diff options
Diffstat (limited to 'drivers/platform/x86/intel_pmc_core.c')
| -rw-r--r-- | drivers/platform/x86/intel_pmc_core.c | 180 |
1 files changed, 138 insertions, 42 deletions
diff --git a/drivers/platform/x86/intel_pmc_core.c b/drivers/platform/x86/intel_pmc_core.c index 6b31d410cb09..22dbf115782e 100644 --- a/drivers/platform/x86/intel_pmc_core.c +++ b/drivers/platform/x86/intel_pmc_core.c @@ -12,6 +12,7 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/acpi.h> +#include <linux/bitfield.h> #include <linux/debugfs.h> #include <linux/delay.h> #include <linux/io.h> @@ -101,10 +102,35 @@ static const struct pmc_bit_map spt_pfear_map[] = { {}, }; +static const struct pmc_bit_map spt_ltr_show_map[] = { + {"SOUTHPORT_A", SPT_PMC_LTR_SPA}, + {"SOUTHPORT_B", SPT_PMC_LTR_SPB}, + {"SATA", SPT_PMC_LTR_SATA}, + {"GIGABIT_ETHERNET", SPT_PMC_LTR_GBE}, + {"XHCI", SPT_PMC_LTR_XHCI}, + {"ME", SPT_PMC_LTR_ME}, + /* EVA is Enterprise Value Add, doesn't really exist on PCH */ + {"EVA", SPT_PMC_LTR_EVA}, + {"SOUTHPORT_C", SPT_PMC_LTR_SPC}, + {"HD_AUDIO", SPT_PMC_LTR_AZ}, + {"LPSS", SPT_PMC_LTR_LPSS}, + {"SOUTHPORT_D", SPT_PMC_LTR_SPD}, + {"SOUTHPORT_E", SPT_PMC_LTR_SPE}, + {"CAMERA", SPT_PMC_LTR_CAM}, + {"ESPI", SPT_PMC_LTR_ESPI}, + {"SCC", SPT_PMC_LTR_SCC}, + {"ISH", SPT_PMC_LTR_ISH}, + /* Below two cannot be used for LTR_IGNORE */ + {"CURRENT_PLATFORM", SPT_PMC_LTR_CUR_PLT}, + {"AGGREGATED_SYSTEM", SPT_PMC_LTR_CUR_ASLT}, + {} +}; + static const struct pmc_reg_map spt_reg_map = { .pfear_sts = spt_pfear_map, .mphy_sts = spt_mphy_map, .pll_sts = spt_pll_map, + .ltr_show_sts = spt_ltr_show_map, .slp_s0_offset = SPT_PMC_SLP_S0_RES_COUNTER_OFFSET, .ltr_ignore_offset = SPT_PMC_LTR_IGNORE_OFFSET, .regmap_length = SPT_PMC_MMIO_REG_LEN, @@ -112,6 +138,7 @@ static const struct pmc_reg_map spt_reg_map = { .ppfear_buckets = SPT_PPFEAR_NUM_ENTRIES, .pm_cfg_offset = SPT_PMC_PM_CFG_OFFSET, .pm_read_disable_bit = SPT_PMC_READ_DISABLE_BIT, + .ltr_ignore_max = SPT_NUM_IP_IGN_ALLOWED, }; /* Cannonlake: PGD PFET Enable Ack Status Register(s) bitmap */ @@ -243,10 +270,38 @@ static const struct pmc_bit_map *cnp_slps0_dbg_maps[] = { NULL, }; +static const struct pmc_bit_map cnp_ltr_show_map[] = { + {"SOUTHPORT_A", CNP_PMC_LTR_SPA}, + {"SOUTHPORT_B", CNP_PMC_LTR_SPB}, + {"SATA", CNP_PMC_LTR_SATA}, + {"GIGABIT_ETHERNET", CNP_PMC_LTR_GBE}, + {"XHCI", CNP_PMC_LTR_XHCI}, + {"ME", CNP_PMC_LTR_ME}, + /* EVA is Enterprise Value Add, doesn't really exist on PCH */ + {"EVA", CNP_PMC_LTR_EVA}, + {"SOUTHPORT_C", CNP_PMC_LTR_SPC}, + {"HD_AUDIO", CNP_PMC_LTR_AZ}, + {"CNV", CNP_PMC_LTR_CNV}, + {"LPSS", CNP_PMC_LTR_LPSS}, + {"SOUTHPORT_D", CNP_PMC_LTR_SPD}, + {"SOUTHPORT_E", CNP_PMC_LTR_SPE}, + {"CAMERA", CNP_PMC_LTR_CAM}, + {"ESPI", CNP_PMC_LTR_ESPI}, + {"SCC", CNP_PMC_LTR_SCC}, + {"ISH", CNP_PMC_LTR_ISH}, + {"UFSX2", CNP_PMC_LTR_UFSX2}, + {"EMMC", CNP_PMC_LTR_EMMC}, + /* Below two cannot be used for LTR_IGNORE */ + {"CURRENT_PLATFORM", CNP_PMC_LTR_CUR_PLT}, + {"AGGREGATED_SYSTEM", CNP_PMC_LTR_CUR_ASLT}, + {} +}; + static const struct pmc_reg_map cnp_reg_map = { .pfear_sts = cnp_pfear_map, .slp_s0_offset = CNP_PMC_SLP_S0_RES_COUNTER_OFFSET, .slps0_dbg_maps = cnp_slps0_dbg_maps, + .ltr_show_sts = cnp_ltr_show_map, .slps0_dbg_offset = CNP_PMC_SLPS0_DBG_OFFSET, .ltr_ignore_offset = CNP_PMC_LTR_IGNORE_OFFSET, .regmap_length = CNP_PMC_MMIO_REG_LEN, @@ -254,6 +309,7 @@ static const struct pmc_reg_map cnp_reg_map = { .ppfear_buckets = CNP_PPFEAR_NUM_ENTRIES, .pm_cfg_offset = CNP_PMC_PM_CFG_OFFSET, .pm_read_disable_bit = CNP_PMC_READ_DISABLE_BIT, + .ltr_ignore_max = CNP_NUM_IP_IGN_ALLOWED, }; static inline u8 pmc_core_reg_read_byte(struct pmc_dev *pmcdev, int offset) @@ -311,7 +367,7 @@ static void pmc_core_display_map(struct seq_file *s, int index, pf_map[index].bit_mask & pf_reg ? "Off" : "On"); } -static int pmc_core_ppfear_sts_show(struct seq_file *s, void *unused) +static int pmc_core_ppfear_show(struct seq_file *s, void *unused) { struct pmc_dev *pmcdev = s->private; const struct pmc_bit_map *map = pmcdev->map->pfear_sts; @@ -329,18 +385,7 @@ static int pmc_core_ppfear_sts_show(struct seq_file *s, void *unused) 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, -}; +DEFINE_SHOW_ATTRIBUTE(pmc_core_ppfear); /* This function should return link status, 0 means ready */ static int pmc_core_mtpmc_link_status(void) @@ -372,7 +417,7 @@ static int pmc_core_send_msg(u32 *addr_xram) return 0; } -static int pmc_core_mphy_pg_sts_show(struct seq_file *s, void *unused) +static int pmc_core_mphy_pg_show(struct seq_file *s, void *unused) { struct pmc_dev *pmcdev = s->private; const struct pmc_bit_map *map = pmcdev->map->mphy_sts; @@ -424,18 +469,7 @@ out_unlock: mutex_unlock(&pmcdev->lock); return err; } - -static int pmc_core_mphy_pg_sts_open(struct inode *inode, struct file *file) -{ - return single_open(file, pmc_core_mphy_pg_sts_show, inode->i_private); -} - -static const struct file_operations pmc_core_mphy_pg_ops = { - .open = pmc_core_mphy_pg_sts_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; +DEFINE_SHOW_ATTRIBUTE(pmc_core_mphy_pg); static int pmc_core_pll_show(struct seq_file *s, void *unused) { @@ -471,18 +505,7 @@ out_unlock: mutex_unlock(&pmcdev->lock); return err; } - -static int pmc_core_pll_open(struct inode *inode, struct file *file) -{ - return single_open(file, pmc_core_pll_show, inode->i_private); -} - -static const struct file_operations pmc_core_pll_ops = { - .open = pmc_core_pll_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; +DEFINE_SHOW_ATTRIBUTE(pmc_core_pll); static ssize_t pmc_core_ltr_ignore_write(struct file *file, const char __user *userbuf, size_t count, loff_t *ppos) @@ -500,7 +523,7 @@ static ssize_t pmc_core_ltr_ignore_write(struct file *file, const char __user goto out_unlock; } - if (val > NUM_IP_IGN_ALLOWED) { + if (val > map->ltr_ignore_max) { err = -EINVAL; goto out_unlock; } @@ -583,6 +606,77 @@ static int pmc_core_slps0_dbg_show(struct seq_file *s, void *unused) } DEFINE_SHOW_ATTRIBUTE(pmc_core_slps0_dbg); +static u32 convert_ltr_scale(u32 val) +{ + /* + * As per PCIE specification supporting document + * ECN_LatencyTolnReporting_14Aug08.pdf the Latency + * Tolerance Reporting data payload is encoded in a + * 3 bit scale and 10 bit value fields. Values are + * multiplied by the indicated scale to yield an absolute time + * value, expressible in a range from 1 nanosecond to + * 2^25*(2^10-1) = 34,326,183,936 nanoseconds. + * + * scale encoding is as follows: + * + * ---------------------------------------------- + * |scale factor | Multiplier (ns) | + * ---------------------------------------------- + * | 0 | 1 | + * | 1 | 32 | + * | 2 | 1024 | + * | 3 | 32768 | + * | 4 | 1048576 | + * | 5 | 33554432 | + * | 6 | Invalid | + * | 7 | Invalid | + * ---------------------------------------------- + */ + if (val > 5) { + pr_warn("Invalid LTR scale factor.\n"); + return 0; + } + + return 1U << (5 * val); +} + +static int pmc_core_ltr_show(struct seq_file *s, void *unused) +{ + struct pmc_dev *pmcdev = s->private; + const struct pmc_bit_map *map = pmcdev->map->ltr_show_sts; + u64 decoded_snoop_ltr, decoded_non_snoop_ltr; + u32 ltr_raw_data, scale, val; + u16 snoop_ltr, nonsnoop_ltr; + int index; + + for (index = 0; map[index].name ; index++) { + decoded_snoop_ltr = decoded_non_snoop_ltr = 0; + ltr_raw_data = pmc_core_reg_read(pmcdev, + map[index].bit_mask); + snoop_ltr = ltr_raw_data & ~MTPMC_MASK; + nonsnoop_ltr = (ltr_raw_data >> 0x10) & ~MTPMC_MASK; + + if (FIELD_GET(LTR_REQ_NONSNOOP, ltr_raw_data)) { + scale = FIELD_GET(LTR_DECODED_SCALE, nonsnoop_ltr); + val = FIELD_GET(LTR_DECODED_VAL, nonsnoop_ltr); + decoded_non_snoop_ltr = val * convert_ltr_scale(scale); + } + + if (FIELD_GET(LTR_REQ_SNOOP, ltr_raw_data)) { + scale = FIELD_GET(LTR_DECODED_SCALE, snoop_ltr); + val = FIELD_GET(LTR_DECODED_VAL, snoop_ltr); + decoded_snoop_ltr = val * convert_ltr_scale(scale); + } + + seq_printf(s, "%-32s\tLTR: RAW: 0x%-16x\tNon-Snoop(ns): %-16llu\tSnoop(ns): %-16llu\n", + map[index].name, ltr_raw_data, + decoded_non_snoop_ltr, + decoded_snoop_ltr); + } + return 0; +} +DEFINE_SHOW_ATTRIBUTE(pmc_core_ltr); + static void pmc_core_dbgfs_unregister(struct pmc_dev *pmcdev) { debugfs_remove_recursive(pmcdev->dbgfs_dir); @@ -602,19 +696,21 @@ static int pmc_core_dbgfs_register(struct pmc_dev *pmcdev) &pmc_core_dev_state); debugfs_create_file("pch_ip_power_gating_status", 0444, dir, pmcdev, - &pmc_core_ppfear_ops); + &pmc_core_ppfear_fops); debugfs_create_file("ltr_ignore", 0644, dir, pmcdev, &pmc_core_ltr_ignore_ops); + debugfs_create_file("ltr_show", 0644, dir, pmcdev, &pmc_core_ltr_fops); + if (pmcdev->map->pll_sts) debugfs_create_file("pll_status", 0444, dir, pmcdev, - &pmc_core_pll_ops); + &pmc_core_pll_fops); if (pmcdev->map->mphy_sts) debugfs_create_file("mphy_core_lanes_power_gating_status", 0444, dir, pmcdev, - &pmc_core_mphy_pg_ops); + &pmc_core_mphy_pg_fops); if (pmcdev->map->slps0_dbg_maps) { debugfs_create_file("slp_s0_debug_status", 0444, |