| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * AMD SoC Power Management Controller Driver |
| * |
| * Copyright (c) 2020, Advanced Micro Devices, Inc. |
| * All Rights Reserved. |
| * |
| * Author: Shyam Sundar S K <Shyam-sundar.S-k@amd.com> |
| */ |
| |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #include <linux/acpi.h> |
| #include <linux/bitfield.h> |
| #include <linux/bits.h> |
| #include <linux/debugfs.h> |
| #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> |
| |
| /* SMU communication registers */ |
| #define AMD_PMC_REGISTER_MESSAGE 0x538 |
| #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 |
| |
| /* STB Registers */ |
| #define AMD_PMC_STB_INDEX_ADDRESS 0xF8 |
| #define AMD_PMC_STB_INDEX_DATA 0xFC |
| #define AMD_PMC_STB_PMI_0 0x03E30600 |
| #define AMD_PMC_STB_PREDEF 0xC6000001 |
| |
| /* STB S2D(Spill to DRAM) has different message port offset */ |
| #define STB_SPILL_TO_DRAM 0xBE |
| #define AMD_S2D_REGISTER_MESSAGE 0xA20 |
| #define AMD_S2D_REGISTER_RESPONSE 0xA80 |
| #define AMD_S2D_REGISTER_ARGUMENT 0xA88 |
| |
| /* STB Spill to DRAM Parameters */ |
| #define S2D_TELEMETRY_BYTES_MAX 0x100000 |
| #define S2D_TELEMETRY_DRAMBYTES_MAX 0x1000000 |
| |
| /* 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 |
| #define AMD_PMC_MAPPING_SIZE 0x01000 |
| #define AMD_PMC_BASE_ADDR_OFFSET 0x10000 |
| #define AMD_PMC_BASE_ADDR_LO 0x13B102E8 |
| #define AMD_PMC_BASE_ADDR_HI 0x13B102EC |
| #define AMD_PMC_BASE_ADDR_LO_MASK GENMASK(15, 0) |
| #define AMD_PMC_BASE_ADDR_HI_MASK GENMASK(31, 20) |
| |
| /* SMU Response Codes */ |
| #define AMD_PMC_RESULT_OK 0x01 |
| #define AMD_PMC_RESULT_CMD_REJECT_BUSY 0xFC |
| #define AMD_PMC_RESULT_CMD_REJECT_PREREQ 0xFD |
| #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 |
| #define SMU_MSG_LOG_GETDRAM_ADDR_LO 0x05 |
| #define SMU_MSG_LOG_START 0x06 |
| #define SMU_MSG_LOG_RESET 0x07 |
| #define SMU_MSG_LOG_DUMP_DATA 0x08 |
| #define SMU_MSG_GET_SUP_CONSTRAINTS 0x09 |
| /* List of supported CPU ids */ |
| #define AMD_CPU_ID_RV 0x15D0 |
| #define AMD_CPU_ID_RN 0x1630 |
| #define AMD_CPU_ID_PCO AMD_CPU_ID_RV |
| #define AMD_CPU_ID_CZN AMD_CPU_ID_RN |
| #define AMD_CPU_ID_YC 0x14B5 |
| #define AMD_CPU_ID_CB 0x14D8 |
| #define AMD_CPU_ID_PS 0x14E8 |
| |
| #define PMC_MSG_DELAY_MIN_US 50 |
| #define RESPONSE_REGISTER_LOOP_MAX 20000 |
| |
| #define SOC_SUBSYSTEM_IP_MAX 12 |
| #define DELAY_MIN_US 2000 |
| #define DELAY_MAX_US 3000 |
| #define FIFO_SIZE 4096 |
| enum amd_pmc_def { |
| MSG_TEST = 0x01, |
| MSG_OS_HINT_PCO, |
| MSG_OS_HINT_RN, |
| }; |
| |
| enum s2d_arg { |
| S2D_TELEMETRY_SIZE = 0x01, |
| S2D_PHYS_ADDR_LOW, |
| S2D_PHYS_ADDR_HIGH, |
| }; |
| |
| struct amd_pmc_bit_map { |
| const char *name; |
| u32 bit_mask; |
| }; |
| |
| static const struct amd_pmc_bit_map soc15_ip_blk[] = { |
| {"DISPLAY", BIT(0)}, |
| {"CPU", BIT(1)}, |
| {"GFX", BIT(2)}, |
| {"VDD", BIT(3)}, |
| {"ACP", BIT(4)}, |
| {"VCN", BIT(5)}, |
| {"ISP", BIT(6)}, |
| {"NBIO", BIT(7)}, |
| {"DF", BIT(8)}, |
| {"USB0", BIT(9)}, |
| {"USB1", BIT(10)}, |
| {"LAPIC", BIT(11)}, |
| {} |
| }; |
| |
| struct amd_pmc_dev { |
| void __iomem *regbase; |
| void __iomem *smu_virt_addr; |
| void __iomem *stb_virt_addr; |
| void __iomem *fch_virt_addr; |
| bool msg_port; |
| u32 base_addr; |
| u32 cpu_id; |
| u32 active_ips; |
| /* SMU version information */ |
| u8 smu_program; |
| u8 major; |
| u8 minor; |
| u8 rev; |
| struct device *dev; |
| struct pci_dev *rdev; |
| struct mutex lock; /* generic mutex lock */ |
| #if IS_ENABLED(CONFIG_DEBUG_FS) |
| struct dentry *dbgfs_dir; |
| #endif /* CONFIG_DEBUG_FS */ |
| }; |
| |
| static bool enable_stb; |
| module_param(enable_stb, bool, 0644); |
| MODULE_PARM_DESC(enable_stb, "Enable the STB debug mechanism"); |
| |
| static struct amd_pmc_dev pmc; |
| static int amd_pmc_send_cmd(struct amd_pmc_dev *dev, u32 arg, u32 *data, u8 msg, bool ret); |
| static int amd_pmc_read_stb(struct amd_pmc_dev *dev, u32 *buf); |
| #ifdef CONFIG_SUSPEND |
| static int amd_pmc_write_stb(struct amd_pmc_dev *dev, u32 data); |
| #endif |
| |
| static inline u32 amd_pmc_reg_read(struct amd_pmc_dev *dev, int reg_offset) |
| { |
| return ioread32(dev->regbase + reg_offset); |
| } |
| |
| static inline void amd_pmc_reg_write(struct amd_pmc_dev *dev, int reg_offset, u32 val) |
| { |
| iowrite32(val, dev->regbase + reg_offset); |
| } |
| |
| struct smu_metrics { |
| u32 table_version; |
| u32 hint_count; |
| u32 s0i3_last_entry_status; |
| u32 timein_s0i2; |
| u64 timeentering_s0i3_lastcapture; |
| u64 timeentering_s0i3_totaltime; |
| u64 timeto_resume_to_os_lastcapture; |
| u64 timeto_resume_to_os_totaltime; |
| u64 timein_s0i3_lastcapture; |
| u64 timein_s0i3_totaltime; |
| u64 timein_swdrips_lastcapture; |
| u64 timein_swdrips_totaltime; |
| u64 timecondition_notmet_lastcapture[SOC_SUBSYSTEM_IP_MAX]; |
| u64 timecondition_notmet_totaltime[SOC_SUBSYSTEM_IP_MAX]; |
| } __packed; |
| |
| static int amd_pmc_stb_debugfs_open(struct inode *inode, struct file *filp) |
| { |
| struct amd_pmc_dev *dev = filp->f_inode->i_private; |
| u32 size = FIFO_SIZE * sizeof(u32); |
| u32 *buf; |
| int rc; |
| |
| buf = kzalloc(size, GFP_KERNEL); |
| if (!buf) |
| return -ENOMEM; |
| |
| rc = amd_pmc_read_stb(dev, buf); |
| if (rc) { |
| kfree(buf); |
| return rc; |
| } |
| |
| filp->private_data = buf; |
| return rc; |
| } |
| |
| static ssize_t amd_pmc_stb_debugfs_read(struct file *filp, char __user *buf, size_t size, |
| loff_t *pos) |
| { |
| if (!filp->private_data) |
| return -EINVAL; |
| |
| return simple_read_from_buffer(buf, size, pos, filp->private_data, |
| FIFO_SIZE * sizeof(u32)); |
| } |
| |
| static int amd_pmc_stb_debugfs_release(struct inode *inode, struct file *filp) |
| { |
| kfree(filp->private_data); |
| return 0; |
| } |
| |
| static const struct file_operations amd_pmc_stb_debugfs_fops = { |
| .owner = THIS_MODULE, |
| .open = amd_pmc_stb_debugfs_open, |
| .read = amd_pmc_stb_debugfs_read, |
| .release = amd_pmc_stb_debugfs_release, |
| }; |
| |
| static int amd_pmc_stb_debugfs_open_v2(struct inode *inode, struct file *filp) |
| { |
| struct amd_pmc_dev *dev = filp->f_inode->i_private; |
| u32 *buf; |
| |
| buf = kzalloc(S2D_TELEMETRY_BYTES_MAX, GFP_KERNEL); |
| if (!buf) |
| return -ENOMEM; |
| |
| memcpy_fromio(buf, dev->stb_virt_addr, S2D_TELEMETRY_BYTES_MAX); |
| filp->private_data = buf; |
| |
| return 0; |
| } |
| |
| static ssize_t amd_pmc_stb_debugfs_read_v2(struct file *filp, char __user *buf, size_t size, |
| loff_t *pos) |
| { |
| if (!filp->private_data) |
| return -EINVAL; |
| |
| return simple_read_from_buffer(buf, size, pos, filp->private_data, |
| S2D_TELEMETRY_BYTES_MAX); |
| } |
| |
| static int amd_pmc_stb_debugfs_release_v2(struct inode *inode, struct file *filp) |
| { |
| kfree(filp->private_data); |
| return 0; |
| } |
| |
| static const struct file_operations amd_pmc_stb_debugfs_fops_v2 = { |
| .owner = THIS_MODULE, |
| .open = amd_pmc_stb_debugfs_open_v2, |
| .read = amd_pmc_stb_debugfs_read_v2, |
| .release = amd_pmc_stb_debugfs_release_v2, |
| }; |
| |
| #if defined(CONFIG_SUSPEND) || defined(CONFIG_DEBUG_FS) |
| static int amd_pmc_setup_smu_logging(struct amd_pmc_dev *dev) |
| { |
| if (dev->cpu_id == AMD_CPU_ID_PCO) { |
| dev_warn_once(dev->dev, "SMU debugging info not supported on this platform\n"); |
| return -EINVAL; |
| } |
| |
| /* Get Active devices list from SMU */ |
| if (!dev->active_ips) |
| amd_pmc_send_cmd(dev, 0, &dev->active_ips, SMU_MSG_GET_SUP_CONSTRAINTS, 1); |
| |
| /* Get dram address */ |
| if (!dev->smu_virt_addr) { |
| u32 phys_addr_low, phys_addr_hi; |
| u64 smu_phys_addr; |
| |
| amd_pmc_send_cmd(dev, 0, &phys_addr_low, SMU_MSG_LOG_GETDRAM_ADDR_LO, 1); |
| amd_pmc_send_cmd(dev, 0, &phys_addr_hi, SMU_MSG_LOG_GETDRAM_ADDR_HI, 1); |
| smu_phys_addr = ((u64)phys_addr_hi << 32 | phys_addr_low); |
| |
| dev->smu_virt_addr = devm_ioremap(dev->dev, smu_phys_addr, |
| sizeof(struct smu_metrics)); |
| if (!dev->smu_virt_addr) |
| return -ENOMEM; |
| } |
| |
| /* Start the logging */ |
| amd_pmc_send_cmd(dev, 0, NULL, SMU_MSG_LOG_RESET, 0); |
| amd_pmc_send_cmd(dev, 0, NULL, SMU_MSG_LOG_START, 0); |
| |
| 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: |
| case AMD_CPU_ID_CB: |
| case AMD_CPU_ID_PS: |
| 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; |
| } |
| |
| static int get_metrics_table(struct amd_pmc_dev *pdev, struct smu_metrics *table) |
| { |
| if (!pdev->smu_virt_addr) { |
| int ret = amd_pmc_setup_smu_logging(pdev); |
| |
| if (ret) |
| return ret; |
| } |
| |
| if (pdev->cpu_id == AMD_CPU_ID_PCO) |
| return -ENODEV; |
| memcpy_fromio(table, pdev->smu_virt_addr, sizeof(struct smu_metrics)); |
| return 0; |
| } |
| #endif /* CONFIG_SUSPEND || CONFIG_DEBUG_FS */ |
| |
| #ifdef CONFIG_SUSPEND |
| static void amd_pmc_validate_deepest(struct amd_pmc_dev *pdev) |
| { |
| struct smu_metrics table; |
| |
| if (get_metrics_table(pdev, &table)) |
| return; |
| |
| if (!table.s0i3_last_entry_status) |
| dev_warn(pdev->dev, "Last suspend didn't reach deepest state\n"); |
| else |
| dev_dbg(pdev->dev, "Last suspend in deepest state for %lluus\n", |
| table.timein_s0i3_lastcapture); |
| } |
| #endif |
| |
| #ifdef CONFIG_DEBUG_FS |
| static int smu_fw_info_show(struct seq_file *s, void *unused) |
| { |
| struct amd_pmc_dev *dev = s->private; |
| struct smu_metrics table; |
| int idx; |
| |
| if (get_metrics_table(dev, &table)) |
| return -EINVAL; |
| |
| 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, "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++) { |
| if (soc15_ip_blk[idx].bit_mask & dev->active_ips) |
| seq_printf(s, "%-8s : %lld\n", soc15_ip_blk[idx].name, |
| table.timecondition_notmet_lastcapture[idx]); |
| } |
| |
| return 0; |
| } |
| 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; |
| |
| /* Use FCH registers to get the S0ix stats */ |
| if (!dev->fch_virt_addr) { |
| u32 base_addr_lo = FCH_BASE_PHY_ADDR_LOW; |
| u32 base_addr_hi = FCH_BASE_PHY_ADDR_HIGH; |
| u64 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; |
| } |
| |
| 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; |
| do_div(residency, 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 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->smu_program = (val >> 24) & GENMASK(7, 0); |
| dev->major = (val >> 16) & GENMASK(7, 0); |
| dev->minor = (val >> 8) & GENMASK(7, 0); |
| dev->rev = (val >> 0) & GENMASK(7, 0); |
| |
| dev_dbg(dev->dev, "SMU program %u version is %u.%u.%u\n", |
| dev->smu_program, dev->major, dev->minor, dev->rev); |
| |
| return 0; |
| } |
| |
| static int amd_pmc_idlemask_show(struct seq_file *s, void *unused) |
| { |
| struct amd_pmc_dev *dev = s->private; |
| int rc; |
| |
| /* we haven't yet read SMU version */ |
| if (!dev->major) { |
| rc = amd_pmc_get_smu_version(dev); |
| if (rc) |
| return 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); |
| } |
| |
| 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); |
| debugfs_create_file("amd_pmc_idlemask", 0644, dev->dbgfs_dir, dev, |
| &amd_pmc_idlemask_fops); |
| /* Enable STB only when the module_param is set */ |
| if (enable_stb) { |
| if (dev->cpu_id == AMD_CPU_ID_YC || dev->cpu_id == AMD_CPU_ID_CB || |
| dev->cpu_id == AMD_CPU_ID_PS) |
| debugfs_create_file("stb_read", 0644, dev->dbgfs_dir, dev, |
| &amd_pmc_stb_debugfs_fops_v2); |
| else |
| debugfs_create_file("stb_read", 0644, dev->dbgfs_dir, dev, |
| &amd_pmc_stb_debugfs_fops); |
| } |
| } |
| #else |
| static inline void amd_pmc_dbgfs_register(struct amd_pmc_dev *dev) |
| { |
| } |
| |
| static inline void amd_pmc_dbgfs_unregister(struct amd_pmc_dev *dev) |
| { |
| } |
| #endif /* CONFIG_DEBUG_FS */ |
| |
| static void amd_pmc_dump_registers(struct amd_pmc_dev *dev) |
| { |
| u32 value, message, argument, response; |
| |
| if (dev->msg_port) { |
| message = AMD_S2D_REGISTER_MESSAGE; |
| argument = AMD_S2D_REGISTER_ARGUMENT; |
| response = AMD_S2D_REGISTER_RESPONSE; |
| } else { |
| message = AMD_PMC_REGISTER_MESSAGE; |
| argument = AMD_PMC_REGISTER_ARGUMENT; |
| response = AMD_PMC_REGISTER_RESPONSE; |
| } |
| |
| value = amd_pmc_reg_read(dev, response); |
| dev_dbg(dev->dev, "AMD_PMC_REGISTER_RESPONSE:%x\n", value); |
| |
| value = amd_pmc_reg_read(dev, argument); |
| dev_dbg(dev->dev, "AMD_PMC_REGISTER_ARGUMENT:%x\n", value); |
| |
| value = amd_pmc_reg_read(dev, message); |
| dev_dbg(dev->dev, "AMD_PMC_REGISTER_MESSAGE:%x\n", value); |
| } |
| |
| static int amd_pmc_send_cmd(struct amd_pmc_dev *dev, u32 arg, u32 *data, u8 msg, bool ret) |
| { |
| int rc; |
| u32 val, message, argument, response; |
| |
| mutex_lock(&dev->lock); |
| |
| if (dev->msg_port) { |
| message = AMD_S2D_REGISTER_MESSAGE; |
| argument = AMD_S2D_REGISTER_ARGUMENT; |
| response = AMD_S2D_REGISTER_RESPONSE; |
| } else { |
| message = AMD_PMC_REGISTER_MESSAGE; |
| argument = AMD_PMC_REGISTER_ARGUMENT; |
| response = AMD_PMC_REGISTER_RESPONSE; |
| } |
| |
| /* Wait until we get a valid response */ |
| rc = readx_poll_timeout(ioread32, dev->regbase + response, |
| val, val != 0, PMC_MSG_DELAY_MIN_US, |
| PMC_MSG_DELAY_MIN_US * RESPONSE_REGISTER_LOOP_MAX); |
| if (rc) { |
| dev_err(dev->dev, "failed to talk to SMU\n"); |
| goto out_unlock; |
| } |
| |
| /* Write zero to response register */ |
| amd_pmc_reg_write(dev, response, 0); |
| |
| /* Write argument into response register */ |
| amd_pmc_reg_write(dev, argument, arg); |
| |
| /* Write message ID to message ID register */ |
| amd_pmc_reg_write(dev, message, msg); |
| |
| /* Wait until we get a valid response */ |
| rc = readx_poll_timeout(ioread32, dev->regbase + response, |
| val, val != 0, PMC_MSG_DELAY_MIN_US, |
| PMC_MSG_DELAY_MIN_US * RESPONSE_REGISTER_LOOP_MAX); |
| if (rc) { |
| dev_err(dev->dev, "SMU response timed out\n"); |
| goto out_unlock; |
| } |
| |
| switch (val) { |
| case AMD_PMC_RESULT_OK: |
| if (ret) { |
| /* PMFW may take longer time to return back the data */ |
| usleep_range(DELAY_MIN_US, 10 * DELAY_MAX_US); |
| *data = amd_pmc_reg_read(dev, argument); |
| } |
| break; |
| case AMD_PMC_RESULT_CMD_REJECT_BUSY: |
| dev_err(dev->dev, "SMU not ready. err: 0x%x\n", val); |
| rc = -EBUSY; |
| goto out_unlock; |
| case AMD_PMC_RESULT_CMD_UNKNOWN: |
| dev_err(dev->dev, "SMU cmd unknown. err: 0x%x\n", val); |
| rc = -EINVAL; |
| goto out_unlock; |
| case AMD_PMC_RESULT_CMD_REJECT_PREREQ: |
| case AMD_PMC_RESULT_FAILED: |
| default: |
| dev_err(dev->dev, "SMU cmd failed. err: 0x%x\n", val); |
| rc = -EIO; |
| goto out_unlock; |
| } |
| |
| out_unlock: |
| mutex_unlock(&dev->lock); |
| amd_pmc_dump_registers(dev); |
| return rc; |
| } |
| |
| #ifdef CONFIG_SUSPEND |
| static int amd_pmc_get_os_hint(struct amd_pmc_dev *dev) |
| { |
| switch (dev->cpu_id) { |
| case AMD_CPU_ID_PCO: |
| return MSG_OS_HINT_PCO; |
| case AMD_CPU_ID_RN: |
| case AMD_CPU_ID_YC: |
| case AMD_CPU_ID_CB: |
| case AMD_CPU_ID_PS: |
| return MSG_OS_HINT_RN; |
| } |
| 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 void amd_pmc_s2idle_prepare(void) |
| { |
| struct amd_pmc_dev *pdev = &pmc; |
| int rc; |
| u8 msg; |
| u32 arg = 1; |
| |
| /* Reset and Start SMU logging - to monitor the s0i3 stats */ |
| amd_pmc_setup_smu_logging(pdev); |
| |
| /* Activate CZN specific RTC functionality */ |
| if (pdev->cpu_id == AMD_CPU_ID_CZN) { |
| rc = amd_pmc_verify_czn_rtc(pdev, &arg); |
| if (rc) { |
| dev_err(pdev->dev, "failed to set RTC: %d\n", rc); |
| return; |
| } |
| } |
| |
| /* Dump the IdleMask before we send hint to SMU */ |
| amd_pmc_idlemask_read(pdev, pdev->dev, NULL); |
| msg = amd_pmc_get_os_hint(pdev); |
| rc = amd_pmc_send_cmd(pdev, arg, NULL, msg, 0); |
| if (rc) { |
| dev_err(pdev->dev, "suspend failed: %d\n", rc); |
| return; |
| } |
| |
| if (enable_stb) { |
| rc = amd_pmc_write_stb(pdev, AMD_PMC_STB_PREDEF); |
| if (rc) |
| dev_err(pdev->dev, "error writing to STB: %d\n", rc); |
| } |
| } |
| |
| static void amd_pmc_s2idle_restore(void) |
| { |
| struct amd_pmc_dev *pdev = &pmc; |
| int rc; |
| u8 msg; |
| |
| 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: %d\n", rc); |
| |
| /* 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, pdev->dev, NULL); |
| |
| /* Write data incremented by 1 to distinguish in stb_read */ |
| if (enable_stb) { |
| rc = amd_pmc_write_stb(pdev, AMD_PMC_STB_PREDEF + 1); |
| if (rc) |
| dev_err(pdev->dev, "error writing to STB: %d\n", rc); |
| } |
| |
| /* Notify on failed entry */ |
| amd_pmc_validate_deepest(pdev); |
| } |
| |
| static struct acpi_s2idle_dev_ops amd_pmc_s2idle_dev_ops = { |
| .prepare = amd_pmc_s2idle_prepare, |
| .restore = amd_pmc_s2idle_restore, |
| }; |
| #endif |
| |
| static const struct pci_device_id pmc_pci_ids[] = { |
| { PCI_DEVICE(PCI_VENDOR_ID_AMD, AMD_CPU_ID_PS) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_AMD, AMD_CPU_ID_CB) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_AMD, AMD_CPU_ID_YC) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_AMD, AMD_CPU_ID_CZN) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_AMD, AMD_CPU_ID_RN) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_AMD, AMD_CPU_ID_PCO) }, |
| { PCI_DEVICE(PCI_VENDOR_ID_AMD, AMD_CPU_ID_RV) }, |
| { } |
| }; |
| |
| static int amd_pmc_s2d_init(struct amd_pmc_dev *dev) |
| { |
| u32 phys_addr_low, phys_addr_hi; |
| u64 stb_phys_addr; |
| u32 size = 0; |
| |
| /* Spill to DRAM feature uses separate SMU message port */ |
| dev->msg_port = 1; |
| |
| amd_pmc_send_cmd(dev, S2D_TELEMETRY_SIZE, &size, STB_SPILL_TO_DRAM, 1); |
| if (size != S2D_TELEMETRY_BYTES_MAX) |
| return -EIO; |
| |
| /* Get STB DRAM address */ |
| amd_pmc_send_cmd(dev, S2D_PHYS_ADDR_LOW, &phys_addr_low, STB_SPILL_TO_DRAM, 1); |
| amd_pmc_send_cmd(dev, S2D_PHYS_ADDR_HIGH, &phys_addr_hi, STB_SPILL_TO_DRAM, 1); |
| |
| stb_phys_addr = ((u64)phys_addr_hi << 32 | phys_addr_low); |
| |
| /* Clear msg_port for other SMU operation */ |
| dev->msg_port = 0; |
| |
| dev->stb_virt_addr = devm_ioremap(dev->dev, stb_phys_addr, S2D_TELEMETRY_DRAMBYTES_MAX); |
| if (!dev->stb_virt_addr) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_SUSPEND |
| static int amd_pmc_write_stb(struct amd_pmc_dev *dev, u32 data) |
| { |
| int err; |
| |
| err = pci_write_config_dword(dev->rdev, AMD_PMC_STB_INDEX_ADDRESS, AMD_PMC_STB_PMI_0); |
| if (err) { |
| dev_err(dev->dev, "failed to write addr in stb: 0x%X\n", |
| AMD_PMC_STB_INDEX_ADDRESS); |
| return pcibios_err_to_errno(err); |
| } |
| |
| err = pci_write_config_dword(dev->rdev, AMD_PMC_STB_INDEX_DATA, data); |
| if (err) { |
| dev_err(dev->dev, "failed to write data in stb: 0x%X\n", |
| AMD_PMC_STB_INDEX_DATA); |
| return pcibios_err_to_errno(err); |
| } |
| |
| return 0; |
| } |
| #endif |
| |
| static int amd_pmc_read_stb(struct amd_pmc_dev *dev, u32 *buf) |
| { |
| int i, err; |
| |
| err = pci_write_config_dword(dev->rdev, AMD_PMC_STB_INDEX_ADDRESS, AMD_PMC_STB_PMI_0); |
| if (err) { |
| dev_err(dev->dev, "error writing addr to stb: 0x%X\n", |
| AMD_PMC_STB_INDEX_ADDRESS); |
| return pcibios_err_to_errno(err); |
| } |
| |
| for (i = 0; i < FIFO_SIZE; i++) { |
| err = pci_read_config_dword(dev->rdev, AMD_PMC_STB_INDEX_DATA, buf++); |
| if (err) { |
| dev_err(dev->dev, "error reading data from stb: 0x%X\n", |
| AMD_PMC_STB_INDEX_DATA); |
| return pcibios_err_to_errno(err); |
| } |
| } |
| |
| return 0; |
| } |
| |
| 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; |
| int err; |
| u32 val; |
| |
| dev->dev = &pdev->dev; |
| |
| rdev = pci_get_domain_bus_and_slot(0, 0, PCI_DEVFN(0, 0)); |
| if (!rdev || !pci_match_id(pmc_pci_ids, rdev)) { |
| err = -ENODEV; |
| goto err_pci_dev_put; |
| } |
| |
| dev->cpu_id = rdev->device; |
| dev->rdev = rdev; |
| err = pci_write_config_dword(rdev, AMD_PMC_SMU_INDEX_ADDRESS, AMD_PMC_BASE_ADDR_LO); |
| if (err) { |
| dev_err(dev->dev, "error writing to 0x%x\n", AMD_PMC_SMU_INDEX_ADDRESS); |
| err = pcibios_err_to_errno(err); |
| goto err_pci_dev_put; |
| } |
| |
| err = pci_read_config_dword(rdev, AMD_PMC_SMU_INDEX_DATA, &val); |
| if (err) { |
| err = pcibios_err_to_errno(err); |
| goto err_pci_dev_put; |
| } |
| |
| base_addr_lo = val & AMD_PMC_BASE_ADDR_HI_MASK; |
| |
| err = pci_write_config_dword(rdev, AMD_PMC_SMU_INDEX_ADDRESS, AMD_PMC_BASE_ADDR_HI); |
| if (err) { |
| dev_err(dev->dev, "error writing to 0x%x\n", AMD_PMC_SMU_INDEX_ADDRESS); |
| err = pcibios_err_to_errno(err); |
| goto err_pci_dev_put; |
| } |
| |
| err = pci_read_config_dword(rdev, AMD_PMC_SMU_INDEX_DATA, &val); |
| if (err) { |
| err = pcibios_err_to_errno(err); |
| goto err_pci_dev_put; |
| } |
| |
| base_addr_hi = val & AMD_PMC_BASE_ADDR_LO_MASK; |
| base_addr = ((u64)base_addr_hi << 32 | base_addr_lo); |
| |
| dev->regbase = devm_ioremap(dev->dev, base_addr + AMD_PMC_BASE_ADDR_OFFSET, |
| AMD_PMC_MAPPING_SIZE); |
| if (!dev->regbase) { |
| err = -ENOMEM; |
| goto err_pci_dev_put; |
| } |
| |
| mutex_init(&dev->lock); |
| |
| if (enable_stb && (dev->cpu_id == AMD_CPU_ID_YC || dev->cpu_id == AMD_CPU_ID_CB)) { |
| err = amd_pmc_s2d_init(dev); |
| if (err) |
| return err; |
| } |
| |
| platform_set_drvdata(pdev, dev); |
| #ifdef CONFIG_SUSPEND |
| err = acpi_register_lps0_dev(&amd_pmc_s2idle_dev_ops); |
| if (err) |
| dev_warn(dev->dev, "failed to register LPS0 sleep handler, expect increased power consumption\n"); |
| #endif |
| |
| amd_pmc_dbgfs_register(dev); |
| return 0; |
| |
| err_pci_dev_put: |
| pci_dev_put(rdev); |
| return err; |
| } |
| |
| static int amd_pmc_remove(struct platform_device *pdev) |
| { |
| struct amd_pmc_dev *dev = platform_get_drvdata(pdev); |
| |
| #ifdef CONFIG_SUSPEND |
| acpi_unregister_lps0_dev(&amd_pmc_s2idle_dev_ops); |
| #endif |
| amd_pmc_dbgfs_unregister(dev); |
| pci_dev_put(dev->rdev); |
| mutex_destroy(&dev->lock); |
| return 0; |
| } |
| |
| static const struct acpi_device_id amd_pmc_acpi_ids[] = { |
| {"AMDI0005", 0}, |
| {"AMDI0006", 0}, |
| {"AMDI0007", 0}, |
| {"AMDI0008", 0}, |
| {"AMD0004", 0}, |
| {"AMD0005", 0}, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(acpi, amd_pmc_acpi_ids); |
| |
| static struct platform_driver amd_pmc_driver = { |
| .driver = { |
| .name = "amd_pmc", |
| .acpi_match_table = amd_pmc_acpi_ids, |
| }, |
| .probe = amd_pmc_probe, |
| .remove = amd_pmc_remove, |
| }; |
| module_platform_driver(amd_pmc_driver); |
| |
| MODULE_LICENSE("GPL v2"); |
| MODULE_DESCRIPTION("AMD PMC Driver"); |