| /* Copyright (c) 2014-2018, The Linux Foundation. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 and |
| * only version 2 as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| */ |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/slab.h> |
| #include <linux/of.h> |
| #include <linux/err.h> |
| #include <linux/sysfs.h> |
| #include <linux/device.h> |
| #include <linux/platform_device.h> |
| #include <linux/moduleparam.h> |
| #include "lpm-levels-legacy.h" |
| |
| bool use_psci; |
| enum lpm_type { |
| IDLE = 0, |
| SUSPEND, |
| LPM_TYPE_NR |
| }; |
| |
| struct lpm_type_str { |
| enum lpm_type type; |
| char *str; |
| }; |
| |
| static const struct lpm_type_str lpm_types[] = { |
| {IDLE, "idle_enabled"}, |
| {SUSPEND, "suspend_enabled"}, |
| }; |
| |
| static DEFINE_PER_CPU(uint32_t *, max_residency); |
| static struct lpm_level_avail *cpu_level_available[NR_CPUS]; |
| static struct platform_device *lpm_pdev; |
| |
| static void *get_enabled_ptr(struct kobj_attribute *attr, |
| struct lpm_level_avail *avail) |
| { |
| void *arg = NULL; |
| |
| if (!strcmp(attr->attr.name, lpm_types[IDLE].str)) |
| arg = (void *) &avail->idle_enabled; |
| else if (!strcmp(attr->attr.name, lpm_types[SUSPEND].str)) |
| arg = (void *) &avail->suspend_enabled; |
| |
| return arg; |
| } |
| |
| static struct lpm_level_avail *get_avail_ptr(struct kobject *kobj, |
| struct kobj_attribute *attr) |
| { |
| struct lpm_level_avail *avail = NULL; |
| |
| if (!strcmp(attr->attr.name, lpm_types[IDLE].str)) |
| avail = container_of(attr, struct lpm_level_avail, |
| idle_enabled_attr); |
| else if (!strcmp(attr->attr.name, lpm_types[SUSPEND].str)) |
| avail = container_of(attr, struct lpm_level_avail, |
| suspend_enabled_attr); |
| |
| return avail; |
| } |
| |
| static void set_optimum_cpu_residency(struct lpm_cpu *cpu, int cpu_id, |
| bool probe_time) |
| { |
| int i, j; |
| bool mode_avail; |
| uint32_t *residency = per_cpu(max_residency, cpu_id); |
| |
| for (i = 0; i < cpu->nlevels; i++) { |
| struct power_params *pwr = &cpu->levels[i].pwr; |
| |
| mode_avail = probe_time || |
| lpm_cpu_mode_allow(cpu_id, i, true); |
| |
| if (!mode_avail) { |
| residency[i] = 0; |
| continue; |
| } |
| |
| residency[i] = ~0; |
| for (j = i + 1; j < cpu->nlevels; j++) { |
| mode_avail = probe_time || |
| lpm_cpu_mode_allow(cpu_id, j, true); |
| |
| if (mode_avail && |
| (residency[i] > pwr->residencies[j]) && |
| (pwr->residencies[j] != 0)) |
| residency[i] = pwr->residencies[j]; |
| } |
| } |
| } |
| |
| static void set_optimum_cluster_residency(struct lpm_cluster *cluster, |
| bool probe_time) |
| { |
| int i, j; |
| bool mode_avail; |
| |
| for (i = 0; i < cluster->nlevels; i++) { |
| struct power_params *pwr = &cluster->levels[i].pwr; |
| |
| mode_avail = probe_time || |
| lpm_cluster_mode_allow(cluster, i, |
| true); |
| |
| if (!mode_avail) { |
| pwr->max_residency = 0; |
| continue; |
| } |
| |
| pwr->max_residency = ~0; |
| for (j = i+1; j < cluster->nlevels; j++) { |
| mode_avail = probe_time || |
| lpm_cluster_mode_allow(cluster, j, |
| true); |
| if (mode_avail && |
| (pwr->max_residency > pwr->residencies[j]) && |
| (pwr->residencies[j] != 0)) |
| pwr->max_residency = pwr->residencies[j]; |
| } |
| } |
| } |
| |
| uint32_t *get_per_cpu_max_residency(int cpu) |
| { |
| return per_cpu(max_residency, cpu); |
| } |
| |
| static ssize_t lpm_enable_show(struct kobject *kobj, |
| struct kobj_attribute *attr, char *buf) |
| { |
| int ret = 0; |
| struct kernel_param kp; |
| |
| kp.arg = get_enabled_ptr(attr, get_avail_ptr(kobj, attr)); |
| ret = param_get_bool(buf, &kp); |
| if (ret > 0) { |
| strlcat(buf, "\n", PAGE_SIZE); |
| ret++; |
| } |
| |
| return ret; |
| } |
| |
| static ssize_t lpm_enable_store(struct kobject *kobj, |
| struct kobj_attribute *attr, const char *buf, size_t len) |
| { |
| int ret = 0; |
| struct kernel_param kp; |
| struct lpm_level_avail *avail; |
| |
| avail = get_avail_ptr(kobj, attr); |
| if (WARN_ON(!avail)) |
| return -EINVAL; |
| |
| kp.arg = get_enabled_ptr(attr, avail); |
| ret = param_set_bool(buf, &kp); |
| |
| if (avail->cpu_node) |
| set_optimum_cpu_residency(avail->data, avail->idx, false); |
| else |
| set_optimum_cluster_residency(avail->data, false); |
| |
| return ret ? ret : len; |
| } |
| |
| static int create_lvl_avail_nodes(const char *name, |
| struct kobject *parent, struct lpm_level_avail *avail, |
| void *data, int index, bool cpu_node) |
| { |
| struct attribute_group *attr_group = NULL; |
| struct attribute **attr = NULL; |
| struct kobject *kobj = NULL; |
| int ret = 0; |
| |
| kobj = kobject_create_and_add(name, parent); |
| if (!kobj) |
| return -ENOMEM; |
| |
| attr_group = devm_kzalloc(&lpm_pdev->dev, sizeof(*attr_group), |
| GFP_KERNEL); |
| if (!attr_group) { |
| ret = -ENOMEM; |
| goto failed; |
| } |
| |
| attr = devm_kzalloc(&lpm_pdev->dev, |
| sizeof(*attr) * (LPM_TYPE_NR + 1), GFP_KERNEL); |
| if (!attr) { |
| ret = -ENOMEM; |
| goto failed; |
| } |
| |
| sysfs_attr_init(&avail->idle_enabled_attr.attr); |
| avail->idle_enabled_attr.attr.name = lpm_types[IDLE].str; |
| avail->idle_enabled_attr.attr.mode = 0644; |
| avail->idle_enabled_attr.show = lpm_enable_show; |
| avail->idle_enabled_attr.store = lpm_enable_store; |
| |
| sysfs_attr_init(&avail->suspend_enabled_attr.attr); |
| avail->suspend_enabled_attr.attr.name = lpm_types[SUSPEND].str; |
| avail->suspend_enabled_attr.attr.mode = 0644; |
| avail->suspend_enabled_attr.show = lpm_enable_show; |
| avail->suspend_enabled_attr.store = lpm_enable_store; |
| |
| attr[0] = &avail->idle_enabled_attr.attr; |
| attr[1] = &avail->suspend_enabled_attr.attr; |
| attr[2] = NULL; |
| attr_group->attrs = attr; |
| |
| ret = sysfs_create_group(kobj, attr_group); |
| if (ret) { |
| ret = -ENOMEM; |
| goto failed; |
| } |
| |
| avail->idle_enabled = true; |
| avail->suspend_enabled = true; |
| avail->kobj = kobj; |
| avail->data = data; |
| avail->idx = index; |
| avail->cpu_node = cpu_node; |
| |
| return ret; |
| |
| failed: |
| kobject_put(kobj); |
| return ret; |
| } |
| |
| static int create_cpu_lvl_nodes(struct lpm_cluster *p, struct kobject *parent) |
| { |
| int cpu; |
| int i, cpu_idx; |
| struct kobject **cpu_kobj = NULL; |
| struct lpm_level_avail *level_list = NULL; |
| char cpu_name[20] = {0}; |
| int ret = 0; |
| |
| cpu_kobj = devm_kzalloc(&lpm_pdev->dev, sizeof(*cpu_kobj) * |
| cpumask_weight(&p->child_cpus), GFP_KERNEL); |
| if (!cpu_kobj) |
| return -ENOMEM; |
| |
| cpu_idx = 0; |
| for_each_cpu(cpu, &p->child_cpus) { |
| snprintf(cpu_name, sizeof(cpu_name), "cpu%d", cpu); |
| cpu_kobj[cpu_idx] = kobject_create_and_add(cpu_name, parent); |
| if (!cpu_kobj[cpu_idx]) { |
| ret = -ENOMEM; |
| goto release_kobj; |
| } |
| |
| level_list = devm_kzalloc(&lpm_pdev->dev, |
| p->cpu->nlevels * sizeof(*level_list), |
| GFP_KERNEL); |
| if (!level_list) { |
| ret = -ENOMEM; |
| goto release_kobj; |
| } |
| |
| for (i = 0; i < p->cpu->nlevels; i++) { |
| |
| ret = create_lvl_avail_nodes(p->cpu->levels[i].name, |
| cpu_kobj[cpu_idx], &level_list[i], |
| (void *)p->cpu, cpu, true); |
| if (ret) |
| goto release_kobj; |
| } |
| |
| cpu_level_available[cpu] = level_list; |
| cpu_idx++; |
| } |
| |
| return ret; |
| |
| release_kobj: |
| for (i = 0; i < cpumask_weight(&p->child_cpus); i++) |
| kobject_put(cpu_kobj[i]); |
| |
| return ret; |
| } |
| |
| int create_cluster_lvl_nodes(struct lpm_cluster *p, struct kobject *kobj) |
| { |
| int ret = 0; |
| struct lpm_cluster *child = NULL; |
| int i; |
| struct kobject *cluster_kobj = NULL; |
| |
| if (!p) |
| return -ENODEV; |
| |
| cluster_kobj = kobject_create_and_add(p->cluster_name, kobj); |
| if (!cluster_kobj) |
| return -ENOMEM; |
| |
| for (i = 0; i < p->nlevels; i++) { |
| ret = create_lvl_avail_nodes(p->levels[i].level_name, |
| cluster_kobj, &p->levels[i].available, |
| (void *)p, 0, false); |
| if (ret) |
| return ret; |
| } |
| |
| list_for_each_entry(child, &p->child, list) { |
| ret = create_cluster_lvl_nodes(child, cluster_kobj); |
| if (ret) |
| return ret; |
| } |
| |
| if (p->cpu) { |
| ret = create_cpu_lvl_nodes(p, cluster_kobj); |
| if (ret) |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| bool lpm_cpu_mode_allow(unsigned int cpu, |
| unsigned int index, bool from_idle) |
| { |
| struct lpm_level_avail *avail = cpu_level_available[cpu]; |
| |
| if (!lpm_pdev || !avail) |
| return !from_idle; |
| |
| return !!(from_idle ? avail[index].idle_enabled : |
| avail[index].suspend_enabled); |
| } |
| |
| bool lpm_cluster_mode_allow(struct lpm_cluster *cluster, |
| unsigned int mode, bool from_idle) |
| { |
| struct lpm_level_avail *avail = &cluster->levels[mode].available; |
| |
| if (!lpm_pdev || !avail) |
| return false; |
| |
| return !!(from_idle ? avail->idle_enabled : |
| avail->suspend_enabled); |
| } |
| |
| static int parse_legacy_cluster_params(struct device_node *node, |
| struct lpm_cluster *c) |
| { |
| int i; |
| char *key; |
| int ret; |
| struct lpm_match { |
| char *devname; |
| int (*set_mode)(struct low_power_ops *, int, |
| struct lpm_cluster_level *); |
| }; |
| struct lpm_match match_tbl[] = { |
| {"l2", set_l2_mode}, |
| {"cci", set_system_mode}, |
| {"l3", set_l3_mode}, |
| {"cbf", set_system_mode}, |
| }; |
| |
| |
| key = "qcom,spm-device-names"; |
| c->ndevices = of_property_count_strings(node, key); |
| |
| if (c->ndevices < 0) { |
| pr_info("%s(): Ignoring cluster params\n", __func__); |
| c->no_saw_devices = true; |
| c->ndevices = 0; |
| return 0; |
| } |
| |
| c->name = devm_kzalloc(&lpm_pdev->dev, c->ndevices * sizeof(*c->name), |
| GFP_KERNEL); |
| c->lpm_dev = devm_kzalloc(&lpm_pdev->dev, |
| c->ndevices * sizeof(*c->lpm_dev), |
| GFP_KERNEL); |
| if (!c->name || !c->lpm_dev) { |
| ret = -ENOMEM; |
| goto failed; |
| } |
| |
| for (i = 0; i < c->ndevices; i++) { |
| char device_name[20]; |
| int j; |
| |
| ret = of_property_read_string_index(node, key, i, &c->name[i]); |
| if (ret) |
| goto failed; |
| snprintf(device_name, sizeof(device_name), "%s-%s", |
| c->cluster_name, c->name[i]); |
| |
| c->lpm_dev[i].spm = msm_spm_get_device_by_name(device_name); |
| |
| if (IS_ERR_OR_NULL(c->lpm_dev[i].spm)) { |
| pr_err("Failed to get spm device by name:%s\n", |
| device_name); |
| ret = PTR_ERR(c->lpm_dev[i].spm); |
| goto failed; |
| } |
| for (j = 0; j < ARRAY_SIZE(match_tbl); j++) { |
| if (!strcmp(c->name[i], match_tbl[j].devname)) |
| c->lpm_dev[i].set_mode = match_tbl[j].set_mode; |
| } |
| |
| if (!c->lpm_dev[i].set_mode) { |
| ret = -ENODEV; |
| goto failed; |
| } |
| } |
| |
| key = "qcom,default-level"; |
| if (of_property_read_u32(node, key, &c->default_level)) |
| c->default_level = 0; |
| return 0; |
| failed: |
| pr_err("%s(): Failed reading %s\n", __func__, key); |
| return ret; |
| } |
| |
| static int parse_cluster_params(struct device_node *node, |
| struct lpm_cluster *c) |
| { |
| char *key; |
| int ret; |
| |
| key = "label"; |
| ret = of_property_read_string(node, key, &c->cluster_name); |
| if (ret) { |
| pr_err("%s(): Cannot read required param %s\n", __func__, key); |
| return ret; |
| } |
| |
| if (use_psci) { |
| key = "qcom,psci-mode-shift"; |
| ret = of_property_read_u32(node, key, |
| &c->psci_mode_shift); |
| if (ret) { |
| pr_err("%s(): Failed to read param: %s\n", |
| __func__, key); |
| return ret; |
| } |
| |
| key = "qcom,psci-mode-mask"; |
| ret = of_property_read_u32(node, key, |
| &c->psci_mode_mask); |
| if (ret) { |
| pr_err("%s(): Failed to read param: %s\n", |
| __func__, key); |
| return ret; |
| } |
| |
| /* Set ndevice to 1 as default */ |
| c->ndevices = 1; |
| |
| return 0; |
| } else |
| return parse_legacy_cluster_params(node, c); |
| } |
| |
| static int parse_lpm_mode(const char *str) |
| { |
| int i; |
| struct lpm_lookup_table mode_lookup[] = { |
| {MSM_SPM_MODE_POWER_COLLAPSE, "pc"}, |
| {MSM_SPM_MODE_STANDALONE_POWER_COLLAPSE, "spc"}, |
| {MSM_SPM_MODE_FASTPC, "fpc"}, |
| {MSM_SPM_MODE_GDHS, "gdhs"}, |
| {MSM_SPM_MODE_RETENTION, "retention"}, |
| {MSM_SPM_MODE_CLOCK_GATING, "wfi"}, |
| {MSM_SPM_MODE_DISABLED, "active"} |
| }; |
| |
| for (i = 0; i < ARRAY_SIZE(mode_lookup); i++) |
| if (!strcmp(str, mode_lookup[i].mode_name)) |
| return mode_lookup[i].modes; |
| return -EINVAL; |
| } |
| |
| static int parse_power_params(struct device_node *node, |
| struct power_params *pwr) |
| { |
| char *key; |
| int ret; |
| |
| key = "qcom,latency-us"; |
| ret = of_property_read_u32(node, key, &pwr->latency_us); |
| if (ret) |
| goto fail; |
| |
| key = "qcom,ss-power"; |
| ret = of_property_read_u32(node, key, &pwr->ss_power); |
| if (ret) |
| goto fail; |
| |
| key = "qcom,energy-overhead"; |
| ret = of_property_read_u32(node, key, &pwr->energy_overhead); |
| if (ret) |
| goto fail; |
| |
| key = "qcom,time-overhead"; |
| ret = of_property_read_u32(node, key, &pwr->time_overhead_us); |
| if (ret) |
| goto fail; |
| |
| fail: |
| if (ret) |
| pr_err("%s(): %s Error reading %s\n", __func__, node->name, |
| key); |
| return ret; |
| } |
| |
| static int parse_cluster_level(struct device_node *node, |
| struct lpm_cluster *cluster) |
| { |
| int i = 0; |
| struct lpm_cluster_level *level = &cluster->levels[cluster->nlevels]; |
| int ret = -ENOMEM; |
| char *key; |
| |
| key = "label"; |
| ret = of_property_read_string(node, key, &level->level_name); |
| if (ret) |
| goto failed; |
| |
| if (use_psci) { |
| char *k = "qcom,psci-mode"; |
| |
| ret = of_property_read_u32(node, k, &level->psci_id); |
| if (ret) |
| goto failed; |
| |
| level->is_reset = of_property_read_bool(node, "qcom,is-reset"); |
| } else if (!cluster->no_saw_devices) { |
| key = "no saw-devices"; |
| |
| level->mode = devm_kzalloc(&lpm_pdev->dev, |
| cluster->ndevices * sizeof(*level->mode), |
| GFP_KERNEL); |
| if (!level->mode) { |
| pr_err("Memory allocation failed\n"); |
| goto failed; |
| } |
| |
| for (i = 0; i < cluster->ndevices; i++) { |
| const char *spm_mode; |
| char key[25] = {0}; |
| |
| snprintf(key, 25, "qcom,spm-%s-mode", cluster->name[i]); |
| ret = of_property_read_string(node, key, &spm_mode); |
| if (ret) |
| goto failed; |
| |
| level->mode[i] = parse_lpm_mode(spm_mode); |
| |
| if (level->mode[i] < 0) |
| goto failed; |
| |
| if (level->mode[i] == MSM_SPM_MODE_POWER_COLLAPSE |
| || level->mode[i] == |
| MSM_SPM_MODE_STANDALONE_POWER_COLLAPSE) |
| level->is_reset |= true; |
| } |
| } |
| |
| key = "label"; |
| ret = of_property_read_string(node, key, &level->level_name); |
| if (ret) |
| goto failed; |
| |
| if (cluster->nlevels != cluster->default_level) { |
| key = "min child idx"; |
| ret = of_property_read_u32(node, "qcom,min-child-idx", |
| &level->min_child_level); |
| if (ret) |
| goto failed; |
| |
| if (cluster->min_child_level > level->min_child_level) |
| cluster->min_child_level = level->min_child_level; |
| } |
| |
| level->notify_rpm = of_property_read_bool(node, "qcom,notify-rpm"); |
| level->disable_dynamic_routing = of_property_read_bool(node, |
| "qcom,disable-dynamic-int-routing"); |
| level->last_core_only = of_property_read_bool(node, |
| "qcom,last-core-only"); |
| level->no_cache_flush = of_property_read_bool(node, |
| "qcom,no-cache-flush"); |
| |
| key = "parse_power_params"; |
| ret = parse_power_params(node, &level->pwr); |
| if (ret) |
| goto failed; |
| |
| key = "qcom,reset-level"; |
| ret = of_property_read_u32(node, key, &level->reset_level); |
| if (ret == -EINVAL) |
| level->reset_level = LPM_RESET_LVL_NONE; |
| else if (ret) |
| goto failed; |
| |
| cluster->nlevels++; |
| return 0; |
| failed: |
| pr_err("Failed %s() key = %s ret = %d\n", __func__, key, ret); |
| return ret; |
| } |
| |
| static int parse_cpu_spm_mode(const char *mode_name) |
| { |
| struct lpm_lookup_table pm_sm_lookup[] = { |
| {MSM_PM_SLEEP_MODE_WAIT_FOR_INTERRUPT, |
| "wfi"}, |
| {MSM_PM_SLEEP_MODE_POWER_COLLAPSE_STANDALONE, |
| "standalone_pc"}, |
| {MSM_PM_SLEEP_MODE_POWER_COLLAPSE, |
| "pc"}, |
| {MSM_PM_SLEEP_MODE_RETENTION, |
| "retention"}, |
| {MSM_PM_SLEEP_MODE_FASTPC, |
| "fpc"}, |
| }; |
| int i; |
| int ret = -EINVAL; |
| |
| for (i = 0; i < ARRAY_SIZE(pm_sm_lookup); i++) { |
| if (!strcmp(mode_name, pm_sm_lookup[i].mode_name)) { |
| ret = pm_sm_lookup[i].modes; |
| break; |
| } |
| } |
| return ret; |
| } |
| |
| static int parse_cpu_mode(struct device_node *n, struct lpm_cpu_level *l) |
| { |
| char *key; |
| int ret; |
| |
| key = "qcom,spm-cpu-mode"; |
| ret = of_property_read_string(n, key, &l->name); |
| if (ret) { |
| pr_err("Failed %s %d\n", n->name, __LINE__); |
| return ret; |
| } |
| |
| if (use_psci) { |
| key = "qcom,psci-cpu-mode"; |
| |
| ret = of_property_read_u32(n, key, &l->psci_id); |
| if (ret) { |
| pr_err("Failed reading %s on device %s\n", key, |
| n->name); |
| return ret; |
| } |
| key = "qcom,hyp-psci"; |
| |
| l->hyp_psci = of_property_read_bool(n, key); |
| } else { |
| l->mode = parse_cpu_spm_mode(l->name); |
| |
| if (l->mode < 0) |
| return l->mode; |
| } |
| return 0; |
| |
| } |
| |
| static int get_cpumask_for_node(struct device_node *node, struct cpumask *mask) |
| { |
| struct device_node *cpu_node; |
| int cpu; |
| int idx = 0; |
| |
| cpu_node = of_parse_phandle(node, "qcom,cpu", idx++); |
| if (!cpu_node) { |
| pr_info("%s: No CPU phandle, assuming single cluster\n", |
| node->full_name); |
| /* |
| * Not all targets have the cpu node populated in the device |
| * tree. If cpu node is not populated assume all possible |
| * nodes belong to this cluster |
| */ |
| cpumask_copy(mask, cpu_possible_mask); |
| return 0; |
| } |
| |
| while (cpu_node) { |
| for_each_possible_cpu(cpu) { |
| if (of_get_cpu_node(cpu, NULL) == cpu_node) { |
| cpumask_set_cpu(cpu, mask); |
| break; |
| } |
| } |
| of_node_put(cpu_node); |
| cpu_node = of_parse_phandle(node, "qcom,cpu", idx++); |
| } |
| |
| return 0; |
| } |
| |
| static int calculate_residency(struct power_params *base_pwr, |
| struct power_params *next_pwr) |
| { |
| int32_t residency = (int32_t)(next_pwr->energy_overhead - |
| base_pwr->energy_overhead) - |
| ((int32_t)(next_pwr->ss_power * next_pwr->time_overhead_us) |
| - (int32_t)(base_pwr->ss_power * base_pwr->time_overhead_us)); |
| |
| residency /= (int32_t)(base_pwr->ss_power - next_pwr->ss_power); |
| |
| if (residency < 0) { |
| pr_err("%s: residency < 0 for LPM\n", |
| __func__); |
| return next_pwr->time_overhead_us; |
| } |
| |
| return residency < next_pwr->time_overhead_us ? |
| next_pwr->time_overhead_us : residency; |
| } |
| |
| static int parse_cpu_levels(struct device_node *node, struct lpm_cluster *c) |
| { |
| struct device_node *n; |
| int ret = -ENOMEM; |
| int i, j; |
| char *key; |
| |
| c->cpu = devm_kzalloc(&lpm_pdev->dev, sizeof(*c->cpu), GFP_KERNEL); |
| if (!c->cpu) |
| return ret; |
| |
| c->cpu->parent = c; |
| if (use_psci) { |
| |
| key = "qcom,psci-mode-shift"; |
| |
| ret = of_property_read_u32(node, key, &c->cpu->psci_mode_shift); |
| if (ret) { |
| pr_err("Failed reading %s on device %s\n", key, |
| node->name); |
| return ret; |
| } |
| key = "qcom,psci-mode-mask"; |
| |
| ret = of_property_read_u32(node, key, &c->cpu->psci_mode_mask); |
| if (ret) { |
| pr_err("Failed reading %s on device %s\n", key, |
| node->name); |
| return ret; |
| } |
| } |
| for_each_child_of_node(node, n) { |
| struct lpm_cpu_level *l = &c->cpu->levels[c->cpu->nlevels]; |
| |
| c->cpu->nlevels++; |
| |
| ret = parse_cpu_mode(n, l); |
| if (ret < 0) { |
| pr_info("Failed %s\n", l->name); |
| goto failed; |
| } |
| |
| ret = parse_power_params(n, &l->pwr); |
| if (ret) |
| goto failed; |
| |
| key = "qcom,use-broadcast-timer"; |
| l->use_bc_timer = of_property_read_bool(n, key); |
| |
| l->is_reset = of_property_read_bool(n, "qcom,is-reset"); |
| |
| key = "qcom,jtag-save-restore"; |
| l->jtag_save_restore = of_property_read_bool(n, key); |
| |
| key = "qcom,reset-level"; |
| ret = of_property_read_u32(n, key, &l->reset_level); |
| if (ret == -EINVAL) |
| l->reset_level = LPM_RESET_LVL_NONE; |
| else if (ret) |
| goto failed; |
| of_node_put(n); |
| } |
| for (i = 0; i < c->cpu->nlevels; i++) { |
| for (j = 0; j < c->cpu->nlevels; j++) { |
| if (i >= j) { |
| c->cpu->levels[i].pwr.residencies[j] = 0; |
| continue; |
| } |
| |
| c->cpu->levels[i].pwr.residencies[j] = |
| calculate_residency(&c->cpu->levels[i].pwr, |
| &c->cpu->levels[j].pwr); |
| |
| pr_err("%s: idx %d %u\n", __func__, j, |
| c->cpu->levels[i].pwr.residencies[j]); |
| } |
| } |
| |
| return 0; |
| failed: |
| of_node_put(n); |
| pr_err("%s(): Failed with error code:%d\n", __func__, ret); |
| return ret; |
| } |
| |
| void free_cluster_node(struct lpm_cluster *cluster) |
| { |
| struct lpm_cluster *cl, *m; |
| |
| list_for_each_entry_safe(cl, m, &cluster->child, list) { |
| list_del(&cl->list); |
| free_cluster_node(cl); |
| }; |
| |
| cluster->ndevices = 0; |
| } |
| |
| /* |
| * TODO: |
| * Expects a CPU or a cluster only. This ensures that affinity |
| * level of a cluster is consistent with reference to its |
| * child nodes. |
| */ |
| static struct lpm_cluster *parse_cluster(struct device_node *node, |
| struct lpm_cluster *parent) |
| { |
| struct lpm_cluster *c; |
| struct device_node *n; |
| char *key; |
| int ret = 0; |
| int i, j; |
| |
| c = devm_kzalloc(&lpm_pdev->dev, sizeof(*c), GFP_KERNEL); |
| if (!c) |
| return ERR_PTR(-ENOMEM); |
| |
| ret = parse_cluster_params(node, c); |
| |
| if (ret) |
| goto failed_parse_params; |
| |
| INIT_LIST_HEAD(&c->child); |
| c->parent = parent; |
| spin_lock_init(&c->sync_lock); |
| c->min_child_level = NR_LPM_LEVELS; |
| |
| for_each_child_of_node(node, n) { |
| |
| if (!n->name) |
| continue; |
| key = "qcom,pm-cluster-level"; |
| if (!of_node_cmp(n->name, key)) { |
| if (parse_cluster_level(n, c)) { |
| of_node_put(n); |
| goto failed_parse_cluster; |
| } |
| of_node_put(n); |
| continue; |
| } |
| |
| key = "qcom,pm-cluster"; |
| if (!of_node_cmp(n->name, key)) { |
| struct lpm_cluster *child; |
| |
| if (c->no_saw_devices) |
| pr_info("%s: SAW device not provided.\n", |
| __func__); |
| |
| child = parse_cluster(n, c); |
| if (!child) { |
| of_node_put(n); |
| goto failed_parse_cluster; |
| } |
| |
| list_add(&child->list, &c->child); |
| cpumask_or(&c->child_cpus, &c->child_cpus, |
| &child->child_cpus); |
| c->aff_level = child->aff_level + 1; |
| of_node_put(n); |
| continue; |
| } |
| |
| key = "qcom,pm-cpu"; |
| if (!of_node_cmp(n->name, key)) { |
| /* |
| * Parse the the cpu node only if a pm-cpu node |
| * is available, though the mask is defined @ the |
| * cluster level |
| */ |
| if (get_cpumask_for_node(node, &c->child_cpus)) |
| goto failed_parse_cluster; |
| |
| if (parse_cpu_levels(n, c)) { |
| of_node_put(n); |
| goto failed_parse_cluster; |
| } |
| |
| c->aff_level = 1; |
| of_node_put(n); |
| |
| for_each_cpu(i, &c->child_cpus) { |
| per_cpu(max_residency, i) = devm_kzalloc( |
| &lpm_pdev->dev, |
| sizeof(uint32_t) * c->cpu->nlevels, |
| GFP_KERNEL); |
| if (!per_cpu(max_residency, i)) |
| return ERR_PTR(-ENOMEM); |
| set_optimum_cpu_residency(c->cpu, i, true); |
| } |
| } |
| } |
| |
| if (cpumask_intersects(&c->child_cpus, cpu_online_mask)) |
| c->last_level = c->default_level; |
| else |
| c->last_level = c->nlevels-1; |
| |
| for (i = 0; i < c->nlevels; i++) { |
| for (j = 0; j < c->nlevels; j++) { |
| if (i >= j) { |
| c->levels[i].pwr.residencies[j] = 0; |
| continue; |
| } |
| c->levels[i].pwr.residencies[j] = calculate_residency( |
| &c->levels[i].pwr, &c->levels[j].pwr); |
| } |
| } |
| set_optimum_cluster_residency(c, true); |
| return c; |
| |
| failed_parse_cluster: |
| pr_err("Failed parse cluster:%s\n", key); |
| if (parent) |
| list_del(&c->list); |
| free_cluster_node(c); |
| failed_parse_params: |
| pr_err("Failed parse params\n"); |
| return NULL; |
| } |
| struct lpm_cluster *lpm_of_parse_cluster(struct platform_device *pdev) |
| { |
| struct device_node *top = NULL; |
| struct lpm_cluster *c; |
| |
| use_psci = of_property_read_bool(pdev->dev.of_node, "qcom,use-psci"); |
| |
| top = of_find_node_by_name(pdev->dev.of_node, "qcom,pm-cluster"); |
| if (!top) { |
| pr_err("Failed to find root node\n"); |
| return ERR_PTR(-ENODEV); |
| } |
| |
| lpm_pdev = pdev; |
| c = parse_cluster(top, NULL); |
| of_node_put(top); |
| return c; |
| } |
| |
| void cluster_dt_walkthrough(struct lpm_cluster *cluster) |
| { |
| struct list_head *list; |
| int i, j; |
| static int id; |
| char str[10] = {0}; |
| |
| if (!cluster) |
| return; |
| |
| for (i = 0; i < id; i++) |
| snprintf(str+i, 10 - i, "\t"); |
| pr_info("%d\n", __LINE__); |
| |
| for (i = 0; i < cluster->nlevels; i++) { |
| struct lpm_cluster_level *l = &cluster->levels[i]; |
| |
| pr_info("%d ndevices:%d\n", __LINE__, cluster->ndevices); |
| for (j = 0; j < cluster->ndevices; j++) |
| pr_info("%sDevice: %pk id:%pk\n", str, |
| &cluster->name[j], &l->mode[i]); |
| } |
| |
| if (cluster->cpu) { |
| pr_info("%d\n", __LINE__); |
| for (j = 0; j < cluster->cpu->nlevels; j++) |
| pr_info("%s\tCPU mode: %s id:%d\n", str, |
| cluster->cpu->levels[j].name, |
| cluster->cpu->levels[j].mode); |
| } |
| |
| id++; |
| |
| |
| list_for_each(list, &cluster->child) { |
| struct lpm_cluster *n; |
| |
| pr_info("%d\n", __LINE__); |
| n = list_entry(list, typeof(*n), list); |
| cluster_dt_walkthrough(n); |
| } |
| id--; |
| } |