diff options
Diffstat (limited to 'drivers/base')
36 files changed, 1860 insertions, 838 deletions
diff --git a/drivers/base/Makefile b/drivers/base/Makefile index 157452080f3d..41369fc7004f 100644 --- a/drivers/base/Makefile +++ b/drivers/base/Makefile @@ -6,7 +6,7 @@ obj-y := component.o core.o bus.o dd.o syscore.o \ cpu.o firmware.o init.o map.o devres.o \ attribute_container.o transport_class.o \ topology.o container.o property.o cacheinfo.o \ - devcon.o swnode.o + swnode.o obj-$(CONFIG_DEVTMPFS) += devtmpfs.o obj-y += power/ obj-$(CONFIG_ISA_BUS_API) += isa.o diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c index 75f72d684294..de8587cc119e 100644 --- a/drivers/base/arch_topology.c +++ b/drivers/base/arch_topology.c @@ -21,18 +21,27 @@ #include <linux/sched.h> #include <linux/smp.h> -__weak bool arch_freq_counters_available(struct cpumask *cpus) +bool topology_scale_freq_invariant(void) +{ + return cpufreq_supports_freq_invariance() || + arch_freq_counters_available(cpu_online_mask); +} + +__weak bool arch_freq_counters_available(const struct cpumask *cpus) { return false; } DEFINE_PER_CPU(unsigned long, freq_scale) = SCHED_CAPACITY_SCALE; -void arch_set_freq_scale(struct cpumask *cpus, unsigned long cur_freq, - unsigned long max_freq) +void topology_set_freq_scale(const struct cpumask *cpus, unsigned long cur_freq, + unsigned long max_freq) { unsigned long scale; int i; + if (WARN_ON_ONCE(!cur_freq || !max_freq)) + return; + /* * If the use of counters for FIE is enabled, just return as we don't * want to update the scale factor with information from CPUFREQ. @@ -71,7 +80,7 @@ static ssize_t cpu_capacity_show(struct device *dev, { struct cpu *cpu = container_of(dev, struct cpu, dev); - return sprintf(buf, "%lu\n", topology_get_cpu_scale(cpu->dev.id)); + return sysfs_emit(buf, "%lu\n", topology_get_cpu_scale(cpu->dev.id)); } static void update_topology_flags_workfn(struct work_struct *work); diff --git a/drivers/base/bus.c b/drivers/base/bus.c index 886e9054999a..a9c23ecebc7c 100644 --- a/drivers/base/bus.c +++ b/drivers/base/bus.c @@ -229,7 +229,7 @@ static DRIVER_ATTR_IGNORE_LOCKDEP(bind, S_IWUSR, NULL, bind_store); static ssize_t drivers_autoprobe_show(struct bus_type *bus, char *buf) { - return sprintf(buf, "%d\n", bus->p->drivers_autoprobe); + return sysfs_emit(buf, "%d\n", bus->p->drivers_autoprobe); } static ssize_t drivers_autoprobe_store(struct bus_type *bus, diff --git a/drivers/base/cacheinfo.c b/drivers/base/cacheinfo.c index 8d553c92cd32..bfc095956dd1 100644 --- a/drivers/base/cacheinfo.c +++ b/drivers/base/cacheinfo.c @@ -362,7 +362,7 @@ static ssize_t file_name##_show(struct device *dev, \ struct device_attribute *attr, char *buf) \ { \ struct cacheinfo *this_leaf = dev_get_drvdata(dev); \ - return sprintf(buf, "%u\n", this_leaf->object); \ + return sysfs_emit(buf, "%u\n", this_leaf->object); \ } show_one(id, id); @@ -377,44 +377,48 @@ static ssize_t size_show(struct device *dev, { struct cacheinfo *this_leaf = dev_get_drvdata(dev); - return sprintf(buf, "%uK\n", this_leaf->size >> 10); + return sysfs_emit(buf, "%uK\n", this_leaf->size >> 10); } -static ssize_t shared_cpumap_show_func(struct device *dev, bool list, char *buf) +static ssize_t shared_cpu_map_show(struct device *dev, + struct device_attribute *attr, char *buf) { struct cacheinfo *this_leaf = dev_get_drvdata(dev); const struct cpumask *mask = &this_leaf->shared_cpu_map; - return cpumap_print_to_pagebuf(list, buf, mask); -} - -static ssize_t shared_cpu_map_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - return shared_cpumap_show_func(dev, false, buf); + return sysfs_emit(buf, "%*pb\n", nr_cpu_ids, mask); } static ssize_t shared_cpu_list_show(struct device *dev, struct device_attribute *attr, char *buf) { - return shared_cpumap_show_func(dev, true, buf); + struct cacheinfo *this_leaf = dev_get_drvdata(dev); + const struct cpumask *mask = &this_leaf->shared_cpu_map; + + return sysfs_emit(buf, "%*pbl\n", nr_cpu_ids, mask); } static ssize_t type_show(struct device *dev, struct device_attribute *attr, char *buf) { struct cacheinfo *this_leaf = dev_get_drvdata(dev); + const char *output; switch (this_leaf->type) { case CACHE_TYPE_DATA: - return sprintf(buf, "Data\n"); + output = "Data"; + break; case CACHE_TYPE_INST: - return sprintf(buf, "Instruction\n"); + output = "Instruction"; + break; case CACHE_TYPE_UNIFIED: - return sprintf(buf, "Unified\n"); + output = "Unified"; + break; default: return -EINVAL; } + + return sysfs_emit(buf, "%s\n", output); } static ssize_t allocation_policy_show(struct device *dev, @@ -422,15 +426,18 @@ static ssize_t allocation_policy_show(struct device *dev, { struct cacheinfo *this_leaf = dev_get_drvdata(dev); unsigned int ci_attr = this_leaf->attributes; - int n = 0; + const char *output; if ((ci_attr & CACHE_READ_ALLOCATE) && (ci_attr & CACHE_WRITE_ALLOCATE)) - n = sprintf(buf, "ReadWriteAllocate\n"); + output = "ReadWriteAllocate"; else if (ci_attr & CACHE_READ_ALLOCATE) - n = sprintf(buf, "ReadAllocate\n"); + output = "ReadAllocate"; else if (ci_attr & CACHE_WRITE_ALLOCATE) - n = sprintf(buf, "WriteAllocate\n"); - return n; + output = "WriteAllocate"; + else + return 0; + + return sysfs_emit(buf, "%s\n", output); } static ssize_t write_policy_show(struct device *dev, @@ -441,9 +448,9 @@ static ssize_t write_policy_show(struct device *dev, int n = 0; if (ci_attr & CACHE_WRITE_THROUGH) - n = sprintf(buf, "WriteThrough\n"); + n = sysfs_emit(buf, "WriteThrough\n"); else if (ci_attr & CACHE_WRITE_BACK) - n = sprintf(buf, "WriteBack\n"); + n = sysfs_emit(buf, "WriteBack\n"); return n; } diff --git a/drivers/base/class.c b/drivers/base/class.c index bcd410e6d70a..c3451481194e 100644 --- a/drivers/base/class.c +++ b/drivers/base/class.c @@ -478,7 +478,7 @@ ssize_t show_class_attr_string(struct class *class, struct class_attribute_string *cs; cs = container_of(attr, struct class_attribute_string, attr); - return snprintf(buf, PAGE_SIZE, "%s\n", cs->str); + return sysfs_emit(buf, "%s\n", cs->str); } EXPORT_SYMBOL_GPL(show_class_attr_string); diff --git a/drivers/base/core.c b/drivers/base/core.c index d00ff3ec8f0f..b919e6d01d9a 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -26,6 +26,7 @@ #include <linux/pm_runtime.h> #include <linux/netdevice.h> #include <linux/sched/signal.h> +#include <linux/sched/mm.h> #include <linux/sysfs.h> #include "base.h" @@ -239,27 +240,35 @@ void device_pm_move_to_tail(struct device *dev) #define to_devlink(dev) container_of((dev), struct device_link, link_dev) static ssize_t status_show(struct device *dev, - struct device_attribute *attr, char *buf) + struct device_attribute *attr, char *buf) { - char *status; + const char *output; switch (to_devlink(dev)->status) { case DL_STATE_NONE: - status = "not tracked"; break; + output = "not tracked"; + break; case DL_STATE_DORMANT: - status = "dormant"; break; + output = "dormant"; + break; case DL_STATE_AVAILABLE: - status = "available"; break; + output = "available"; + break; case DL_STATE_CONSUMER_PROBE: - status = "consumer probing"; break; + output = "consumer probing"; + break; case DL_STATE_ACTIVE: - status = "active"; break; + output = "active"; + break; case DL_STATE_SUPPLIER_UNBIND: - status = "supplier unbinding"; break; + output = "supplier unbinding"; + break; default: - status = "unknown"; break; + output = "unknown"; + break; } - return sprintf(buf, "%s\n", status); + + return sysfs_emit(buf, "%s\n", output); } static DEVICE_ATTR_RO(status); @@ -267,16 +276,16 @@ static ssize_t auto_remove_on_show(struct device *dev, struct device_attribute *attr, char *buf) { struct device_link *link = to_devlink(dev); - char *str; + const char *output; if (link->flags & DL_FLAG_AUTOREMOVE_SUPPLIER) - str = "supplier unbind"; + output = "supplier unbind"; else if (link->flags & DL_FLAG_AUTOREMOVE_CONSUMER) - str = "consumer unbind"; + output = "consumer unbind"; else - str = "never"; + output = "never"; - return sprintf(buf, "%s\n", str); + return sysfs_emit(buf, "%s\n", output); } static DEVICE_ATTR_RO(auto_remove_on); @@ -285,7 +294,7 @@ static ssize_t runtime_pm_show(struct device *dev, { struct device_link *link = to_devlink(dev); - return sprintf(buf, "%d\n", !!(link->flags & DL_FLAG_PM_RUNTIME)); + return sysfs_emit(buf, "%d\n", !!(link->flags & DL_FLAG_PM_RUNTIME)); } static DEVICE_ATTR_RO(runtime_pm); @@ -294,7 +303,8 @@ static ssize_t sync_state_only_show(struct device *dev, { struct device_link *link = to_devlink(dev); - return sprintf(buf, "%d\n", !!(link->flags & DL_FLAG_SYNC_STATE_ONLY)); + return sysfs_emit(buf, "%d\n", + !!(link->flags & DL_FLAG_SYNC_STATE_ONLY)); } static DEVICE_ATTR_RO(sync_state_only); @@ -1059,7 +1069,7 @@ static ssize_t waiting_for_supplier_show(struct device *dev, && dev->links.need_for_probe; mutex_unlock(&wfs_lock); device_unlock(dev); - return sprintf(buf, "%u\n", val); + return sysfs_emit(buf, "%u\n", val); } static DEVICE_ATTR_RO(waiting_for_supplier); @@ -1709,7 +1719,7 @@ ssize_t device_show_ulong(struct device *dev, char *buf) { struct dev_ext_attribute *ea = to_ext_attr(attr); - return snprintf(buf, PAGE_SIZE, "%lx\n", *(unsigned long *)(ea->var)); + return sysfs_emit(buf, "%lx\n", *(unsigned long *)(ea->var)); } EXPORT_SYMBOL_GPL(device_show_ulong); @@ -1739,7 +1749,7 @@ ssize_t device_show_int(struct device *dev, { struct dev_ext_attribute *ea = to_ext_attr(attr); - return snprintf(buf, PAGE_SIZE, "%d\n", *(int *)(ea->var)); + return sysfs_emit(buf, "%d\n", *(int *)(ea->var)); } EXPORT_SYMBOL_GPL(device_show_int); @@ -1760,7 +1770,7 @@ ssize_t device_show_bool(struct device *dev, struct device_attribute *attr, { struct dev_ext_attribute *ea = to_ext_attr(attr); - return snprintf(buf, PAGE_SIZE, "%d\n", *(bool *)(ea->var)); + return sysfs_emit(buf, "%d\n", *(bool *)(ea->var)); } EXPORT_SYMBOL_GPL(device_show_bool); @@ -1934,7 +1944,7 @@ static ssize_t uevent_show(struct device *dev, struct device_attribute *attr, struct kset *kset; struct kobj_uevent_env *env = NULL; int i; - size_t count = 0; + int len = 0; int retval; /* search the kset, the device belongs to */ @@ -1964,10 +1974,10 @@ static ssize_t uevent_show(struct device *dev, struct device_attribute *attr, /* copy keys to file */ for (i = 0; i < env->envp_idx; i++) - count += sprintf(&buf[count], "%s\n", env->envp[i]); + len += sysfs_emit_at(buf, len, "%s\n", env->envp[i]); out: kfree(env); - return count; + return len; } static ssize_t uevent_store(struct device *dev, struct device_attribute *attr, @@ -1994,7 +2004,7 @@ static ssize_t online_show(struct device *dev, struct device_attribute *attr, device_lock(dev); val = !dev->offline; device_unlock(dev); - return sprintf(buf, "%u\n", val); + return sysfs_emit(buf, "%u\n", val); } static ssize_t online_store(struct device *dev, struct device_attribute *attr, @@ -3064,6 +3074,7 @@ void device_del(struct device *dev) struct device *parent = dev->parent; struct kobject *glue_dir = NULL; struct class_interface *class_intf; + unsigned int noio_flag; device_lock(dev); kill_device(dev); @@ -3075,6 +3086,7 @@ void device_del(struct device *dev) /* Notify clients of device removal. This call must come * before dpm_sysfs_remove(). */ + noio_flag = memalloc_noio_save(); if (dev->bus) blocking_notifier_call_chain(&dev->bus->p->bus_notifier, BUS_NOTIFY_DEL_DEVICE, dev); @@ -3116,6 +3128,7 @@ void device_del(struct device *dev) glue_dir = get_glue_dir(dev); kobject_del(&dev->kobj); cleanup_glue_dir(dev, glue_dir); + memalloc_noio_restore(noio_flag); put_device(parent); } EXPORT_SYMBOL_GPL(device_del); @@ -3326,7 +3339,7 @@ struct device *device_find_child_by_name(struct device *parent, klist_iter_init(&parent->p->klist_children, &i); while ((child = next_device(&i))) - if (!strcmp(dev_name(child), name) && get_device(child)) + if (sysfs_streq(dev_name(child), name) && get_device(child)) break; klist_iter_exit(&i); return child; @@ -4063,22 +4076,21 @@ void device_shutdown(void) */ #ifdef CONFIG_PRINTK -static int -create_syslog_header(const struct device *dev, char *hdr, size_t hdrlen) +static void +set_dev_info(const struct device *dev, struct dev_printk_info *dev_info) { const char *subsys; - size_t pos = 0; + + memset(dev_info, 0, sizeof(*dev_info)); if (dev->class) subsys = dev->class->name; else if (dev->bus) subsys = dev->bus->name; else - return 0; + return; - pos += snprintf(hdr + pos, hdrlen - pos, "SUBSYSTEM=%s", subsys); - if (pos >= hdrlen) - goto overflow; + strscpy(dev_info->subsystem, subsys, sizeof(dev_info->subsystem)); /* * Add device identifier DEVICE=: @@ -4094,41 +4106,28 @@ create_syslog_header(const struct device *dev, char *hdr, size_t hdrlen) c = 'b'; else c = 'c'; - pos++; - pos += snprintf(hdr + pos, hdrlen - pos, - "DEVICE=%c%u:%u", - c, MAJOR(dev->devt), MINOR(dev->devt)); + + snprintf(dev_info->device, sizeof(dev_info->device), + "%c%u:%u", c, MAJOR(dev->devt), MINOR(dev->devt)); } else if (strcmp(subsys, "net") == 0) { struct net_device *net = to_net_dev(dev); - pos++; - pos += snprintf(hdr + pos, hdrlen - pos, - "DEVICE=n%u", net->ifindex); + snprintf(dev_info->device, sizeof(dev_info->device), + "n%u", net->ifindex); } else { - pos++; - pos += snprintf(hdr + pos, hdrlen - pos, - "DEVICE=+%s:%s", subsys, dev_name(dev)); + snprintf(dev_info->device, sizeof(dev_info->device), + "+%s:%s", subsys, dev_name(dev)); } - - if (pos >= hdrlen) - goto overflow; - - return pos; - -overflow: - dev_WARN(dev, "device/subsystem name too long"); - return 0; } int dev_vprintk_emit(int level, const struct device *dev, const char *fmt, va_list args) { - char hdr[128]; - size_t hdrlen; + struct dev_printk_info dev_info; - hdrlen = create_syslog_header(dev, hdr, sizeof(hdr)); + set_dev_info(dev, &dev_info); - return vprintk_emit(0, level, hdrlen ? hdr : NULL, hdrlen, fmt, args); + return vprintk_emit(0, level, &dev_info, fmt, args); } EXPORT_SYMBOL(dev_vprintk_emit); diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c index d2136ab9b14a..8f1d6569564c 100644 --- a/drivers/base/cpu.c +++ b/drivers/base/cpu.c @@ -139,11 +139,11 @@ EXPORT_SYMBOL_GPL(cpu_subsys); #ifdef CONFIG_KEXEC #include <linux/kexec.h> -static ssize_t show_crash_notes(struct device *dev, struct device_attribute *attr, +static ssize_t crash_notes_show(struct device *dev, + struct device_attribute *attr, char *buf) { struct cpu *cpu = container_of(dev, struct cpu, dev); - ssize_t rc; unsigned long long addr; int cpunum; @@ -156,21 +156,18 @@ static ssize_t show_crash_notes(struct device *dev, struct device_attribute *att * operation should be safe. No locking required. */ addr = per_cpu_ptr_to_phys(per_cpu_ptr(crash_notes, cpunum)); - rc = sprintf(buf, "%Lx\n", addr); - return rc; + + return sysfs_emit(buf, "%llx\n", addr); } -static DEVICE_ATTR(crash_notes, 0400, show_crash_notes, NULL); +static DEVICE_ATTR_ADMIN_RO(crash_notes); -static ssize_t show_crash_notes_size(struct device *dev, +static ssize_t crash_notes_size_show(struct device *dev, struct device_attribute *attr, char *buf) { - ssize_t rc; - - rc = sprintf(buf, "%zu\n", sizeof(note_buf_t)); - return rc; + return sysfs_emit(buf, "%zu\n", sizeof(note_buf_t)); } -static DEVICE_ATTR(crash_notes_size, 0400, show_crash_notes_size, NULL); +static DEVICE_ATTR_ADMIN_RO(crash_notes_size); static struct attribute *crash_note_cpu_attrs[] = { &dev_attr_crash_notes.attr, @@ -231,7 +228,7 @@ static struct cpu_attr cpu_attrs[] = { static ssize_t print_cpus_kernel_max(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "%d\n", NR_CPUS - 1); + return sysfs_emit(buf, "%d\n", NR_CPUS - 1); } static DEVICE_ATTR(kernel_max, 0444, print_cpus_kernel_max, NULL); @@ -241,37 +238,37 @@ unsigned int total_cpus; static ssize_t print_cpus_offline(struct device *dev, struct device_attribute *attr, char *buf) { - int n = 0, len = PAGE_SIZE-2; + int len = 0; cpumask_var_t offline; /* display offline cpus < nr_cpu_ids */ if (!alloc_cpumask_var(&offline, GFP_KERNEL)) return -ENOMEM; cpumask_andnot(offline, cpu_possible_mask, cpu_online_mask); - n = scnprintf(buf, len, "%*pbl", cpumask_pr_args(offline)); + len += sysfs_emit_at(buf, len, "%*pbl", cpumask_pr_args(offline)); free_cpumask_var(offline); /* display offline cpus >= nr_cpu_ids */ if (total_cpus && nr_cpu_ids < total_cpus) { - if (n && n < len) - buf[n++] = ','; + len += sysfs_emit_at(buf, len, ","); if (nr_cpu_ids == total_cpus-1) - n += scnprintf(&buf[n], len - n, "%u", nr_cpu_ids); + len += sysfs_emit_at(buf, len, "%u", nr_cpu_ids); else - n += scnprintf(&buf[n], len - n, "%u-%d", - nr_cpu_ids, total_cpus-1); + len += sysfs_emit_at(buf, len, "%u-%d", + nr_cpu_ids, total_cpus - 1); } - n += scnprintf(&buf[n], len - n, "\n"); - return n; + len += sysfs_emit_at(buf, len, "\n"); + + return len; } static DEVICE_ATTR(offline, 0444, print_cpus_offline, NULL); static ssize_t print_cpus_isolated(struct device *dev, struct device_attribute *attr, char *buf) { - int n; + int len; cpumask_var_t isolated; if (!alloc_cpumask_var(&isolated, GFP_KERNEL)) @@ -279,19 +276,19 @@ static ssize_t print_cpus_isolated(struct device *dev, cpumask_andnot(isolated, cpu_possible_mask, housekeeping_cpumask(HK_FLAG_DOMAIN)); - n = sprintf(buf, "%*pbl\n", cpumask_pr_args(isolated)); + len = sysfs_emit(buf, "%*pbl\n", cpumask_pr_args(isolated)); free_cpumask_var(isolated); - return n; + return len; } static DEVICE_ATTR(isolated, 0444, print_cpus_isolated, NULL); #ifdef CONFIG_NO_HZ_FULL static ssize_t print_cpus_nohz_full(struct device *dev, - struct device_attribute *attr, char *buf) + struct device_attribute *attr, char *buf) { - return sprintf(buf, "%*pbl\n", cpumask_pr_args(tick_nohz_full_mask)); + return sysfs_emit(buf, "%*pbl\n", cpumask_pr_args(tick_nohz_full_mask)); } static DEVICE_ATTR(nohz_full, 0444, print_cpus_nohz_full, NULL); #endif @@ -320,22 +317,23 @@ static ssize_t print_cpu_modalias(struct device *dev, struct device_attribute *attr, char *buf) { - ssize_t n; + int len = 0; u32 i; - n = sprintf(buf, "cpu:type:" CPU_FEATURE_TYPEFMT ":feature:", - CPU_FEATURE_TYPEVAL); + len += sysfs_emit_at(buf, len, + "cpu:type:" CPU_FEATURE_TYPEFMT ":feature:", + CPU_FEATURE_TYPEVAL); for (i = 0; i < MAX_CPU_FEATURES; i++) if (cpu_have_feature(i)) { - if (PAGE_SIZE < n + sizeof(",XXXX\n")) { + if (len + sizeof(",XXXX\n") >= PAGE_SIZE) { WARN(1, "CPU features overflow page\n"); break; } - n += sprintf(&buf[n], ",%04X", i); + len += sysfs_emit_at(buf, len, ",%04X", i); } - buf[n++] = '\n'; - return n; + len += sysfs_emit_at(buf, len, "\n"); + return len; } static int cpu_uevent(struct device *dev, struct kobj_uevent_env *env) @@ -516,56 +514,56 @@ static void __init cpu_dev_register_generic(void) ssize_t __weak cpu_show_meltdown(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "Not affected\n"); + return sysfs_emit(buf, "Not affected\n"); } ssize_t __weak cpu_show_spectre_v1(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "Not affected\n"); + return sysfs_emit(buf, "Not affected\n"); } ssize_t __weak cpu_show_spectre_v2(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "Not affected\n"); + return sysfs_emit(buf, "Not affected\n"); } ssize_t __weak cpu_show_spec_store_bypass(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "Not affected\n"); + return sysfs_emit(buf, "Not affected\n"); } ssize_t __weak cpu_show_l1tf(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "Not affected\n"); + return sysfs_emit(buf, "Not affected\n"); } ssize_t __weak cpu_show_mds(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "Not affected\n"); + return sysfs_emit(buf, "Not affected\n"); } ssize_t __weak cpu_show_tsx_async_abort(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "Not affected\n"); + return sysfs_emit(buf, "Not affected\n"); } ssize_t __weak cpu_show_itlb_multihit(struct device *dev, - struct device_attribute *attr, char *buf) + struct device_attribute *attr, char *buf) { - return sprintf(buf, "Not affected\n"); + return sysfs_emit(buf, "Not affected\n"); } ssize_t __weak cpu_show_srbds(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "Not affected\n"); + return sysfs_emit(buf, "Not affected\n"); } static DEVICE_ATTR(meltdown, 0444, cpu_show_meltdown, NULL); diff --git a/drivers/base/dd.c b/drivers/base/dd.c index b3d43ace5c2b..b42229b74fd6 100644 --- a/drivers/base/dd.c +++ b/drivers/base/dd.c @@ -486,7 +486,8 @@ static ssize_t state_synced_show(struct device *dev, device_lock(dev); val = dev->state_synced; device_unlock(dev); - return sprintf(buf, "%u\n", val); + + return sysfs_emit(buf, "%u\n", val); } static DEVICE_ATTR_RO(state_synced); @@ -658,15 +659,14 @@ done: */ static int really_probe_debug(struct device *dev, struct device_driver *drv) { - ktime_t calltime, delta, rettime; + ktime_t calltime, rettime; int ret; calltime = ktime_get(); ret = really_probe(dev, drv); rettime = ktime_get(); - delta = ktime_sub(rettime, calltime); pr_debug("probe of %s returned %d after %lld usecs\n", - dev_name(dev), ret, (s64) ktime_to_us(delta)); + dev_name(dev), ret, ktime_us_delta(rettime, calltime)); return ret; } diff --git a/drivers/base/devcon.c b/drivers/base/devcon.c deleted file mode 100644 index 14e2178e09f8..000000000000 --- a/drivers/base/devcon.c +++ /dev/null @@ -1,231 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/** - * Device connections - * - * Copyright (C) 2018 Intel Corporation - * Author: Heikki Krogerus <heikki.krogerus@linux.intel.com> - */ - -#include <linux/device.h> -#include <linux/property.h> - -static DEFINE_MUTEX(devcon_lock); -static LIST_HEAD(devcon_list); - -static void * -fwnode_graph_devcon_match(struct fwnode_handle *fwnode, const char *con_id, - void *data, devcon_match_fn_t match) -{ - struct device_connection con = { .id = con_id }; - struct fwnode_handle *ep; - void *ret; - - fwnode_graph_for_each_endpoint(fwnode, ep) { - con.fwnode = fwnode_graph_get_remote_port_parent(ep); - if (!fwnode_device_is_available(con.fwnode)) - continue; - - ret = match(&con, -1, data); - fwnode_handle_put(con.fwnode); - if (ret) { - fwnode_handle_put(ep); - return ret; - } - } - return NULL; -} - -static void * -fwnode_devcon_match(struct fwnode_handle *fwnode, const char *con_id, - void *data, devcon_match_fn_t match) -{ - struct device_connection con = { }; - void *ret; - int i; - - for (i = 0; ; i++) { - con.fwnode = fwnode_find_reference(fwnode, con_id, i); - if (IS_ERR(con.fwnode)) - break; - - ret = match(&con, -1, data); - fwnode_handle_put(con.fwnode); - if (ret) - return ret; - } - - return NULL; -} - -/** - * fwnode_connection_find_match - Find connection from a device node - * @fwnode: Device node with the connection - * @con_id: Identifier for the connection - * @data: Data for the match function - * @match: Function to check and convert the connection description - * - * Find a connection with unique identifier @con_id between @fwnode and another - * device node. @match will be used to convert the connection description to - * data the caller is expecting to be returned. - */ -void *fwnode_connection_find_match(struct fwnode_handle *fwnode, - const char *con_id, void *data, - devcon_match_fn_t match) -{ - void *ret; - - if (!fwnode || !match) - return NULL; - - ret = fwnode_graph_devcon_match(fwnode, con_id, data, match); - if (ret) - return ret; - - return fwnode_devcon_match(fwnode, con_id, data, match); -} -EXPORT_SYMBOL_GPL(fwnode_connection_find_match); - -/** - * device_connection_find_match - Find physical connection to a device - * @dev: Device with the connection - * @con_id: Identifier for the connection - * @data: Data for the match function - * @match: Function to check and convert the connection description - * - * Find a connection with unique identifier @con_id between @dev and another - * device. @match will be used to convert the connection description to data the - * caller is expecting to be returned. - */ -void *device_connection_find_match(struct device *dev, const char *con_id, - void *data, devcon_match_fn_t match) -{ - struct fwnode_handle *fwnode = dev_fwnode(dev); - const char *devname = dev_name(dev); - struct device_connection *con; - void *ret = NULL; - int ep; - - if (!match) - return NULL; - - ret = fwnode_connection_find_match(fwnode, con_id, data, match); - if (ret) - return ret; - - mutex_lock(&devcon_lock); - - list_for_each_entry(con, &devcon_list, list) { - ep = match_string(con->endpoint, 2, devname); - if (ep < 0) - continue; - - if (con_id && strcmp(con->id, con_id)) - continue; - - ret = match(con, !ep, data); - if (ret) - break; - } - - mutex_unlock(&devcon_lock); - - return ret; -} -EXPORT_SYMBOL_GPL(device_connection_find_match); - -extern struct bus_type platform_bus_type; -extern struct bus_type pci_bus_type; -extern struct bus_type i2c_bus_type; -extern struct bus_type spi_bus_type; - -static struct bus_type *generic_match_buses[] = { - &platform_bus_type, -#ifdef CONFIG_PCI - &pci_bus_type, -#endif -#ifdef CONFIG_I2C - &i2c_bus_type, -#endif -#ifdef CONFIG_SPI_MASTER - &spi_bus_type, -#endif - NULL, -}; - -static void *device_connection_fwnode_match(struct device_connection *con) -{ - struct bus_type *bus; - struct device *dev; - - for (bus = generic_match_buses[0]; bus; bus++) { - dev = bus_find_device_by_fwnode(bus, con->fwnode); - if (dev && !strncmp(dev_name(dev), con->id, strlen(con->id))) - return dev; - - put_device(dev); - } - return NULL; -} - -/* This tries to find the device from the most common bus types by name. */ -static void *generic_match(struct device_connection *con, int ep, void *data) -{ - struct bus_type *bus; - struct device *dev; - - if (con->fwnode) - return device_connection_fwnode_match(con); - - for (bus = generic_match_buses[0]; bus; bus++) { - dev = bus_find_device_by_name(bus, NULL, con->endpoint[ep]); - if (dev) - return dev; - } - - /* - * We only get called if a connection was found, tell the caller to - * wait for the other device to show up. - */ - return ERR_PTR(-EPROBE_DEFER); -} - -/** - * device_connection_find - Find two devices connected together - * @dev: Device with the connection - * @con_id: Identifier for the connection - * - * Find a connection with unique identifier @con_id between @dev and - * another device. On success returns handle to the device that is connected - * to @dev, with the reference count for the found device incremented. Returns - * NULL if no matching connection was found, or ERR_PTR(-EPROBE_DEFER) when a - * connection was found but the other device has not been enumerated yet. - */ -struct device *device_connection_find(struct device *dev, const char *con_id) -{ - return device_connection_find_match(dev, con_id, NULL, generic_match); -} -EXPORT_SYMBOL_GPL(device_connection_find); - -/** - * device_connection_add - Register a connection description - * @con: The connection description to be registered - */ -void device_connection_add(struct device_connection *con) -{ - mutex_lock(&devcon_lock); - list_add_tail(&con->list, &devcon_list); - mutex_unlock(&devcon_lock); -} -EXPORT_SYMBOL_GPL(device_connection_add); - -/** - * device_connections_remove - Unregister connection description - * @con: The connection description to be unregistered - */ -void device_connection_remove(struct device_connection *con) -{ - mutex_lock(&devcon_lock); - list_del(&con->list); - mutex_unlock(&devcon_lock); -} -EXPORT_SYMBOL_GPL(device_connection_remove); diff --git a/drivers/base/devcoredump.c b/drivers/base/devcoredump.c index e42d0b514384..9243468e2c99 100644 --- a/drivers/base/devcoredump.c +++ b/drivers/base/devcoredump.c @@ -123,7 +123,7 @@ static int devcd_free(struct device *dev, void *data) static ssize_t disabled_show(struct class *class, struct class_attribute *attr, char *buf) { - return sprintf(buf, "%d\n", devcd_disabled); + return sysfs_emit(buf, "%d\n", devcd_disabled); } static ssize_t disabled_store(struct class *class, struct class_attribute *attr, diff --git a/drivers/base/devres.c b/drivers/base/devres.c index ed615d3b9cf1..586e9a75c840 100644 --- a/drivers/base/devres.c +++ b/drivers/base/devres.c @@ -126,6 +126,14 @@ static void add_dr(struct device *dev, struct devres_node *node) list_add_tail(&node->entry, &dev->devres_head); } +static void replace_dr(struct device *dev, + struct devres_node *old, struct devres_node *new) +{ + devres_log(dev, old, "REPLACE"); + BUG_ON(!list_empty(&new->entry)); + list_replace(&old->entry, &new->entry); +} + #ifdef CONFIG_DEBUG_DEVRES void * __devres_alloc_node(dr_release_t release, size_t size, gfp_t gfp, int nid, const char *name) @@ -838,6 +846,103 @@ void *devm_kmalloc(struct device *dev, size_t size, gfp_t gfp) EXPORT_SYMBOL_GPL(devm_kmalloc); /** + * devm_krealloc - Resource-managed krealloc() + * @dev: Device to re-allocate memory for + * @ptr: Pointer to the memory chunk to re-allocate + * @new_size: New allocation size + * @gfp: Allocation gfp flags + * + * Managed krealloc(). Resizes the memory chunk allocated with devm_kmalloc(). + * Behaves similarly to regular krealloc(): if @ptr is NULL or ZERO_SIZE_PTR, + * it's the equivalent of devm_kmalloc(). If new_size is zero, it frees the + * previously allocated memory and returns ZERO_SIZE_PTR. This function doesn't + * change the order in which the release callback for the re-alloc'ed devres + * will be called (except when falling back to devm_kmalloc() or when freeing + * resources when new_size is zero). The contents of the memory are preserved + * up to the lesser of new and old sizes. + */ +void *devm_krealloc(struct device *dev, void *ptr, size_t new_size, gfp_t gfp) +{ + size_t total_new_size, total_old_size; + struct devres *old_dr, *new_dr; + unsigned long flags; + + if (unlikely(!new_size)) { + devm_kfree(dev, ptr); + return ZERO_SIZE_PTR; + } + + if (unlikely(ZERO_OR_NULL_PTR(ptr))) + return devm_kmalloc(dev, new_size, gfp); + + if (WARN_ON(is_kernel_rodata((unsigned long)ptr))) + /* + * We cannot reliably realloc a const string returned by + * devm_kstrdup_const(). + */ + return NULL; + + if (!check_dr_size(new_size, &total_new_size)) + return NULL; + + total_old_size = ksize(container_of(ptr, struct devres, data)); + if (total_old_size == 0) { + WARN(1, "Pointer doesn't point to dynamically allocated memory."); + return NULL; + } + + /* + * If new size is smaller or equal to the actual number of bytes + * allocated previously - just return the same pointer. + */ + if (total_new_size <= total_old_size) + return ptr; + + /* + * Otherwise: allocate new, larger chunk. We need to allocate before + * taking the lock as most probably the caller uses GFP_KERNEL. + */ + new_dr = alloc_dr(devm_kmalloc_release, + total_new_size, gfp, dev_to_node(dev)); + if (!new_dr) + return NULL; + + /* + * The spinlock protects the linked list against concurrent + * modifications but not the resource itself. + */ + spin_lock_irqsave(&dev->devres_lock, flags); + + old_dr = find_dr(dev, devm_kmalloc_release, devm_kmalloc_match, ptr); + if (!old_dr) { + spin_unlock_irqrestore(&dev->devres_lock, flags); + kfree(new_dr); + WARN(1, "Memory chunk not managed or managed by a different device."); + return NULL; + } + + replace_dr(dev, &old_dr->node, &new_dr->node); + + spin_unlock_irqrestore(&dev->devres_lock, flags); + + /* + * We can copy the memory contents after releasing the lock as we're + * no longer modyfing the list links. + */ + memcpy(new_dr->data, old_dr->data, + total_old_size - offsetof(struct devres, data)); + /* + * Same for releasing the old devres - it's now been removed from the + * list. This is also the reason why we must not use devm_kfree() - the + * links are no longer valid. + */ + kfree(old_dr); + + return new_dr->data; +} +EXPORT_SYMBOL_GPL(devm_krealloc); + +/** * devm_kstrdup - Allocate resource managed space and * copy an existing string into that. * @dev: Device to allocate memory for diff --git a/drivers/base/firmware_loader/fallback.c b/drivers/base/firmware_loader/fallback.c index 283ca2de76d4..4dec4b79ae06 100644 --- a/drivers/base/firmware_loader/fallback.c +++ b/drivers/base/firmware_loader/fallback.c @@ -124,7 +124,7 @@ void kill_pending_fw_fallback_reqs(bool only_kill_custom) static ssize_t timeout_show(struct class *class, struct class_attribute *attr, char *buf) { - return sprintf(buf, "%d\n", __firmware_loading_timeout()); + return sysfs_emit(buf, "%d\n", __firmware_loading_timeout()); } /** @@ -219,7 +219,7 @@ static ssize_t firmware_loading_show(struct device *dev, loading = fw_sysfs_loading(fw_sysfs->fw_priv); mutex_unlock(&fw_lock); - return sprintf(buf, "%d\n", loading); + return sysfs_emit(buf, "%d\n", loading); } /** @@ -272,9 +272,9 @@ static ssize_t firmware_loading_store(struct device *dev, dev_err(dev, "%s: map pages failed\n", __func__); else - rc = security_kernel_post_read_file(NULL, - fw_priv->data, fw_priv->size, - READING_FIRMWARE); + rc = security_kernel_post_load_data(fw_priv->data, + fw_priv->size, + LOADING_FIRMWARE, "blob"); /* * Same logic as fw_load_abort, only the DONE bit @@ -490,13 +490,11 @@ exit: /** * fw_load_sysfs_fallback() - load a firmware via the sysfs fallback mechanism * @fw_sysfs: firmware sysfs information for the firmware to load - * @opt_flags: flags of options, FW_OPT_* * @timeout: timeout to wait for the load * * In charge of constructing a sysfs fallback interface for firmware loading. **/ -static int fw_load_sysfs_fallback(struct fw_sysfs *fw_sysfs, - u32 opt_flags, long timeout) +static int fw_load_sysfs_fallback(struct fw_sysfs *fw_sysfs, long timeout) { int retval = 0; struct device *f_dev = &fw_sysfs->dev; @@ -518,7 +516,7 @@ static int fw_load_sysfs_fallback(struct fw_sysfs *fw_sysfs, list_add(&fw_priv->pending_list, &pending_fw_head); mutex_unlock(&fw_lock); - if (opt_flags & FW_OPT_UEVENT) { + if (fw_priv->opt_flags & FW_OPT_UEVENT) { fw_priv->need_uevent = true; dev_set_uevent_suppress(f_dev, false); dev_dbg(f_dev, "firmware: requesting %s\n", fw_priv->fw_name); @@ -580,10 +578,10 @@ static int fw_load_from_user_helper(struct firmware *firmware, } fw_sysfs->fw_priv = firmware->priv; - ret = fw_load_sysfs_fallback(fw_sysfs, opt_flags, timeout); + ret = fw_load_sysfs_fallback(fw_sysfs, timeout); if (!ret) - ret = assign_fw(firmware, device, opt_flags); + ret = assign_fw(firmware, device); out_unlock: usermodehelper_read_unlock(); @@ -613,7 +611,7 @@ static bool fw_run_sysfs_fallback(u32 opt_flags) return false; /* Also permit LSMs and IMA to fail firmware sysfs fallback */ - ret = security_kernel_load_data(LOADING_FIRMWARE); + ret = security_kernel_load_data(LOADING_FIRMWARE, true); if (ret < 0) return false; @@ -625,7 +623,8 @@ static bool fw_run_sysfs_fallback(u32 opt_flags) * @fw: pointer to firmware image * @name: name of firmware file to look for * @device: device for which firmware is being loaded - * @opt_flags: options to control firmware loading behaviour + * @opt_flags: options to control firmware loading behaviour, as defined by + * &enum fw_opt * @ret: return value from direct lookup which triggered the fallback mechanism * * This function is called if direct lookup for the firmware failed, it enables diff --git a/drivers/base/firmware_loader/fallback.h b/drivers/base/firmware_loader/fallback.h index 2afdb6adb23f..3af7205b302f 100644 --- a/drivers/base/firmware_loader/fallback.h +++ b/drivers/base/firmware_loader/fallback.h @@ -67,10 +67,9 @@ static inline void unregister_sysfs_loader(void) #endif /* CONFIG_FW_LOADER_USER_HELPER */ #ifdef CONFIG_EFI_EMBEDDED_FIRMWARE -int firmware_fallback_platform(struct fw_priv *fw_priv, u32 opt_flags); +int firmware_fallback_platform(struct fw_priv *fw_priv); #else -static inline int firmware_fallback_platform(struct fw_priv *fw_priv, - u32 opt_flags) +static inline int firmware_fallback_platform(struct fw_priv *fw_priv) { return -ENOENT; } diff --git a/drivers/base/firmware_loader/fallback_platform.c b/drivers/base/firmware_loader/fallback_platform.c index 685edb7dd05a..00af99f0aff2 100644 --- a/drivers/base/firmware_loader/fallback_platform.c +++ b/drivers/base/firmware_loader/fallback_platform.c @@ -8,16 +8,16 @@ #include "fallback.h" #include "firmware.h" -int firmware_fallback_platform(struct fw_priv *fw_priv, u32 opt_flags) +int firmware_fallback_platform(struct fw_priv *fw_priv) { const u8 *data; size_t size; int rc; - if (!(opt_flags & FW_OPT_FALLBACK_PLATFORM)) + if (!(fw_priv->opt_flags & FW_OPT_FALLBACK_PLATFORM)) return -ENOENT; - rc = security_kernel_load_data(LOADING_FIRMWARE_EFI_EMBEDDED); + rc = security_kernel_load_data(LOADING_FIRMWARE, true); if (rc) return rc; @@ -27,6 +27,12 @@ int firmware_fallback_platform(struct fw_priv *fw_priv, u32 opt_flags) if (fw_priv->data && size > fw_priv->allocated_size) return -ENOMEM; + + rc = security_kernel_post_load_data((u8 *)data, size, LOADING_FIRMWARE, + "platform"); + if (rc) + return rc; + if (!fw_priv->data) fw_priv->data = vmalloc(size); if (!fw_priv->data) diff --git a/drivers/base/firmware_loader/firmware.h b/drivers/base/firmware_loader/firmware.h index d08efc77cf16..63bd29fdcb9c 100644 --- a/drivers/base/firmware_loader/firmware.h +++ b/drivers/base/firmware_loader/firmware.h @@ -32,6 +32,8 @@ * @FW_OPT_FALLBACK_PLATFORM: Enable fallback to device fw copy embedded in * the platform's main firmware. If both this fallback and the sysfs * fallback are enabled, then this fallback will be tried first. + * @FW_OPT_PARTIAL: Allow partial read of firmware instead of needing to read + * entire file. */ enum fw_opt { FW_OPT_UEVENT = BIT(0), @@ -41,6 +43,7 @@ enum fw_opt { FW_OPT_NOCACHE = BIT(4), FW_OPT_NOFALLBACK_SYSFS = BIT(5), FW_OPT_FALLBACK_PLATFORM = BIT(6), + FW_OPT_PARTIAL = BIT(7), }; enum fw_status { @@ -68,6 +71,8 @@ struct fw_priv { void *data; size_t size; size_t allocated_size; + size_t offset; + u32 opt_flags; #ifdef CONFIG_FW_LOADER_PAGED_BUF bool is_paged_buf; struct page **pages; @@ -136,7 +141,7 @@ static inline void fw_state_done(struct fw_priv *fw_priv) __fw_state_set(fw_priv, FW_STATUS_DONE); } -int assign_fw(struct firmware *fw, struct device *device, u32 opt_flags); +int assign_fw(struct firmware *fw, struct device *device); #ifdef CONFIG_FW_LOADER_PAGED_BUF void fw_free_paged_buf(struct fw_priv *fw_priv); diff --git a/drivers/base/firmware_loader/main.c b/drivers/base/firmware_loader/main.c index 63b9714a0154..78355095e00d 100644 --- a/drivers/base/firmware_loader/main.c +++ b/drivers/base/firmware_loader/main.c @@ -12,6 +12,7 @@ #include <linux/capability.h> #include <linux/device.h> +#include <linux/kernel_read_file.h> #include <linux/module.h> #include <linux/init.h> #include <linux/timer.h> @@ -167,10 +168,21 @@ static int fw_cache_piggyback_on_request(const char *name); static struct fw_priv *__allocate_fw_priv(const char *fw_name, struct firmware_cache *fwc, - void *dbuf, size_t size) + void *dbuf, + size_t size, + size_t offset, + u32 opt_flags) { struct fw_priv *fw_priv; + /* For a partial read, the buffer must be preallocated. */ + if ((opt_flags & FW_OPT_PARTIAL) && !dbuf) + return NULL; + + /* Only partial reads are allowed to use an offset. */ + if (offset != 0 && !(opt_flags & FW_OPT_PARTIAL)) + return NULL; + fw_priv = kzalloc(sizeof(*fw_priv), GFP_ATOMIC); if (!fw_priv) return NULL; @@ -185,6 +197,8 @@ static struct fw_priv *__allocate_fw_priv(const char *fw_name, fw_priv->fwc = fwc; fw_priv->data = dbuf; fw_priv->allocated_size = size; + fw_priv->offset = offset; + fw_priv->opt_flags = opt_flags; fw_state_init(fw_priv); #ifdef CONFIG_FW_LOADER_USER_HELPER INIT_LIST_HEAD(&fw_priv->pending_list); @@ -209,13 +223,20 @@ static struct fw_priv *__lookup_fw_priv(const char *fw_name) /* Returns 1 for batching firmware requests with the same name */ static int alloc_lookup_fw_priv(const char *fw_name, struct firmware_cache *fwc, - struct fw_priv **fw_priv, void *dbuf, - size_t size, u32 opt_flags) + struct fw_priv **fw_priv, + void *dbuf, + size_t size, + size_t offset, + u32 opt_flags) { struct fw_priv *tmp; spin_lock(&fwc->lock); - if (!(opt_flags & FW_OPT_NOCACHE)) { + /* + * Do not merge requests that are marked to be non-cached or + * are performing partial reads. + */ + if (!(opt_flags & (FW_OPT_NOCACHE | FW_OPT_PARTIAL))) { tmp = __lookup_fw_priv(fw_name); if (tmp) { kref_get(&tmp->ref); @@ -226,7 +247,7 @@ static int alloc_lookup_fw_priv(const char *fw_name, } } - tmp = __allocate_fw_priv(fw_name, fwc, dbuf, size); + tmp = __allocate_fw_priv(fw_name, fwc, dbuf, size, offset, opt_flags); if (tmp) { INIT_LIST_HEAD(&tmp->list); if (!(opt_flags & FW_OPT_NOCACHE)) @@ -466,18 +487,16 @@ fw_get_filesystem_firmware(struct device *device, struct fw_priv *fw_priv, size_t in_size, const void *in_buffer)) { - loff_t size; + size_t size; int i, len; int rc = -ENOENT; char *path; - enum kernel_read_file_id id = READING_FIRMWARE; size_t msize = INT_MAX; void *buffer = NULL; /* Already populated data member means we're loading into a buffer */ if (!decompress && fw_priv->data) { buffer = fw_priv->data; - id = READING_FIRMWARE_PREALLOC_BUFFER; msize = fw_priv->allocated_size; } @@ -486,6 +505,9 @@ fw_get_filesystem_firmware(struct device *device, struct fw_priv *fw_priv, return -ENOMEM; for (i = 0; i < ARRAY_SIZE(fw_path); i++) { + size_t file_size = 0; + size_t *file_size_ptr = NULL; + /* skip the unset customized path */ if (!fw_path[i][0]) continue; @@ -499,10 +521,20 @@ fw_get_filesystem_firmware(struct device *device, struct fw_priv *fw_priv, fw_priv->size = 0; + /* + * The total file size is only examined when doing a partial + * read; the "full read" case needs to fail if the whole + * firmware was not completely loaded. + */ + if ((fw_priv->opt_flags & FW_OPT_PARTIAL) && buffer) + file_size_ptr = &file_size; + /* load firmware files from the mount namespace of init */ - rc = kernel_read_file_from_path_initns(path, &buffer, - &size, msize, id); - if (rc) { + rc = kernel_read_file_from_path_initns(path, fw_priv->offset, + &buffer, msize, + file_size_ptr, + READING_FIRMWARE); + if (rc < 0) { if (rc != -ENOENT) dev_warn(device, "loading %s failed with error %d\n", path, rc); @@ -511,6 +543,9 @@ fw_get_filesystem_firmware(struct device *device, struct fw_priv *fw_priv, path); continue; } + size = rc; + rc = 0; + dev_dbg(device, "Loading firmware from %s\n", path); if (decompress) { dev_dbg(device, "f/w decompressing %s\n", @@ -637,7 +672,7 @@ static int fw_add_devm_name(struct device *dev, const char *name) } #endif -int assign_fw(struct firmware *fw, struct device *device, u32 opt_flags) +int assign_fw(struct firmware *fw, struct device *device) { struct fw_priv *fw_priv = fw->priv; int ret; @@ -656,8 +691,8 @@ int assign_fw(struct firmware *fw, struct device *device, u32 opt_flags) * should be fixed in devres or driver core. */ /* don't cache firmware handled without uevent */ - if (device && (opt_flags & FW_OPT_UEVENT) && - !(opt_flags & FW_OPT_NOCACHE)) { + if (device && (fw_priv->opt_flags & FW_OPT_UEVENT) && + !(fw_priv->opt_flags & FW_OPT_NOCACHE)) { ret = fw_add_devm_name(device, fw_priv->fw_name); if (ret) { mutex_unlock(&fw_lock); @@ -669,7 +704,7 @@ int assign_fw(struct firmware *fw, struct device *device, u32 opt_flags) * After caching firmware image is started, let it piggyback * on request firmware. */ - if (!(opt_flags & FW_OPT_NOCACHE) && + if (!(fw_priv->opt_flags & FW_OPT_NOCACHE) && fw_priv->fwc->state == FW_LOADER_START_CACHE) { if (fw_cache_piggyback_on_request(fw_priv->fw_name)) kref_get(&fw_priv->ref); @@ -688,7 +723,7 @@ int assign_fw(struct firmware *fw, struct device *device, u32 opt_flags) static int _request_firmware_prepare(struct firmware **firmware_p, const char *name, struct device *device, void *dbuf, size_t size, - u32 opt_flags) + size_t offset, u32 opt_flags) { struct firmware *firmware; struct fw_priv *fw_priv; @@ -707,7 +742,7 @@ _request_firmware_prepare(struct firmware **firmware_p, const char *name, } ret = alloc_lookup_fw_priv(name, &fw_cache, &fw_priv, dbuf, size, - opt_flags); + offset, opt_flags); /* * bind with 'priv' now to avoid warning in failure path @@ -754,9 +789,10 @@ static void fw_abort_batch_reqs(struct firmware *fw) static int _request_firmware(const struct firmware **firmware_p, const char *name, struct device *device, void *buf, size_t size, - u32 opt_flags) + size_t offset, u32 opt_flags) { struct firmware *fw = NULL; + bool nondirect = false; int ret; if (!firmware_p) @@ -768,28 +804,34 @@ _request_firmware(const struct firmware **firmware_p, const char *name, } ret = _request_firmware_prepare(&fw, name, device, buf, size, - opt_flags); + offset, opt_flags); if (ret <= 0) /* error or already assigned */ goto out; ret = fw_get_filesystem_firmware(device, fw->priv, "", NULL); + + /* Only full reads can support decompression, platform, and sysfs. */ + if (!(opt_flags & FW_OPT_PARTIAL)) + nondirect = true; + #ifdef CONFIG_FW_LOADER_COMPRESS - if (ret == -ENOENT) + if (ret == -ENOENT && nondirect) ret = fw_get_filesystem_firmware(device, fw->priv, ".xz", fw_decompress_xz); #endif - - if (ret == -ENOENT) - ret = firmware_fallback_platform(fw->priv, opt_flags); + if (ret == -ENOENT && nondirect) + ret = firmware_fallback_platform(fw->priv); if (ret) { if (!(opt_flags & FW_OPT_NO_WARN)) dev_warn(device, "Direct firmware load for %s failed with error %d\n", name, ret); - ret = firmware_fallback_sysfs(fw, name, device, opt_flags, ret); + if (nondirect) + ret = firmware_fallback_sysfs(fw, name, device, + opt_flags, ret); } else - ret = assign_fw(fw, device, opt_flags); + ret = assign_fw(fw, device); out: if (ret < 0) { @@ -830,7 +872,7 @@ request_firmware(const struct firmware **firmware_p, const char *name, /* Need to pin this module until return */ __module_get(THIS_MODULE); - ret = _request_firmware(firmware_p, name, device, NULL, 0, + ret = _request_firmware(firmware_p, name, device, NULL, 0, 0, FW_OPT_UEVENT); module_put(THIS_MODULE); return ret; @@ -857,7 +899,7 @@ int firmware_request_nowarn(const struct firmware **firmware, const char *name, /* Need to pin this module until return */ __module_get(THIS_MODULE); - ret = _request_firmware(firmware, name, device, NULL, 0, + ret = _request_firmware(firmware, name, device, NULL, 0, 0, FW_OPT_UEVENT | FW_OPT_NO_WARN); module_put(THIS_MODULE); return ret; @@ -881,7 +923,7 @@ int request_firmware_direct(const struct firmware **firmware_p, int ret; __module_get(THIS_MODULE); - ret = _request_firmware(firmware_p, name, device, NULL, 0, + ret = _request_firmware(firmware_p, name, device, NULL, 0, 0, FW_OPT_UEVENT | FW_OPT_NO_WARN | FW_OPT_NOFALLBACK_SYSFS); module_put(THIS_MODULE); @@ -906,7 +948,7 @@ int firmware_request_platform(const struct firmware **firmware, /* Need to pin this module until return */ __module_get(THIS_MODULE); - ret = _request_firmware(firmware, name, device, NULL, 0, + ret = _request_firmware(firmware, name, device, NULL, 0, 0, FW_OPT_UEVENT | FW_OPT_FALLBACK_PLATFORM); module_put(THIS_MODULE); return ret; @@ -962,7 +1004,7 @@ request_firmware_into_buf(const struct firmware **firmware_p, const char *name, return -EOPNOTSUPP; __module_get(THIS_MODULE); - ret = _request_firmware(firmware_p, name, device, buf, size, + ret = _request_firmware(firmware_p, name, device, buf, size, 0, FW_OPT_UEVENT | FW_OPT_NOCACHE); module_put(THIS_MODULE); return ret; @@ -970,6 +1012,37 @@ request_firmware_into_buf(const struct firmware **firmware_p, const char *name, EXPORT_SYMBOL(request_firmware_into_buf); /** + * request_partial_firmware_into_buf() - load partial firmware into a previously allocated buffer + * @firmware_p: pointer to firmware image + * @name: name of firmware file + * @device: device for which firmware is being loaded and DMA region allocated + * @buf: address of buffer to load firmware into + * @size: size of buffer + * @offset: offset into file to read + * + * This function works pretty much like request_firmware_into_buf except + * it allows a partial read of the file. + */ +int +request_partial_firmware_into_buf(const struct firmware **firmware_p, + const char *name, struct device *device, + void *buf, size_t size, size_t offset) +{ + int ret; + + if (fw_cache_is_setup(device, name)) + return -EOPNOTSUPP; + + __module_get(THIS_MODULE); + ret = _request_firmware(firmware_p, name, device, buf, size, offset, + FW_OPT_UEVENT | FW_OPT_NOCACHE | + FW_OPT_PARTIAL); + module_put(THIS_MODULE); + return ret; +} +EXPORT_SYMBOL(request_partial_firmware_into_buf); + +/** * release_firmware() - release the resource associated with a firmware image * @fw: firmware resource to release **/ @@ -1001,7 +1074,7 @@ static void request_firmware_work_func(struct work_struct *work) fw_work = container_of(work, struct firmware_work, work); - _request_firmware(&fw, fw_work->name, fw_work->device, NULL, 0, + _request_firmware(&fw, fw_work->name, fw_work->device, NULL, 0, 0, fw_work->opt_flags); fw_work->cont(fw, fw_work->context); put_device(fw_work->device); /* taken in request_firmware_nowait() */ diff --git a/drivers/base/memory.c b/drivers/base/memory.c index 4db3c660de83..adf828dfccf0 100644 --- a/drivers/base/memory.c +++ b/drivers/base/memory.c @@ -119,7 +119,8 @@ static ssize_t phys_index_show(struct device *dev, unsigned long phys_index; phys_index = mem->start_section_nr / sections_per_block; - return sprintf(buf, "%08lx\n", phys_index); + + return sysfs_emit(buf, "%08lx\n", phys_index); } /* @@ -129,7 +130,7 @@ static ssize_t phys_index_show(struct device *dev, static ssize_t removable_show(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "%d\n", (int)IS_ENABLED(CONFIG_MEMORY_HOTREMOVE)); + return sysfs_emit(buf, "%d\n", (int)IS_ENABLED(CONFIG_MEMORY_HOTREMOVE)); } /* @@ -139,7 +140,7 @@ static ssize_t state_show(struct device *dev, struct device_attribute *attr, char *buf) { struct memory_block *mem = to_memory_block(dev); - ssize_t len = 0; + const char *output; /* * We can probably put these states in a nice little array @@ -147,22 +148,20 @@ static ssize_t state_show(struct device *dev, struct device_attribute *attr, */ switch (mem->state) { case MEM_ONLINE: - len = sprintf(buf, "online\n"); + output = "online"; break; case MEM_OFFLINE: - len = sprintf(buf, "offline\n"); + output = "offline"; break; case MEM_GOING_OFFLINE: - len = sprintf(buf, "going-offline\n"); + output = "going-offline"; break; default: - len = sprintf(buf, "ERROR-UNKNOWN-%ld\n", - mem->state); WARN_ON(1); - break; + return sysfs_emit(buf, "ERROR-UNKNOWN-%ld\n", mem->state); } - return len; + return sysfs_emit(buf, "%s\n", output); } int memory_notify(unsigned long val, void *v) @@ -303,21 +302,22 @@ static ssize_t phys_device_show(struct device *dev, struct device_attribute *attr, char *buf) { struct memory_block *mem = to_memory_block(dev); - return sprintf(buf, "%d\n", mem->phys_device); + + return sysfs_emit(buf, "%d\n", mem->phys_device); } #ifdef CONFIG_MEMORY_HOTREMOVE -static void print_allowed_zone(char *buf, int nid, unsigned long start_pfn, - unsigned long nr_pages, int online_type, - struct zone *default_zone) +static int print_allowed_zone(char *buf, int len, int nid, + unsigned long start_pfn, unsigned long nr_pages, + int online_type, struct zone *default_zone) { struct zone *zone; zone = zone_for_pfn_range(online_type, nid, start_pfn, nr_pages); - if (zone != default_zone) { - strcat(buf, " "); - strcat(buf, zone->name); - } + if (zone == default_zone) + return 0; + + return sysfs_emit_at(buf, len, " %s", zone->name); } static ssize_t valid_zones_show(struct device *dev, @@ -327,6 +327,7 @@ static ssize_t valid_zones_show(struct device *dev, unsigned long start_pfn = section_nr_to_pfn(mem->start_section_nr); unsigned long nr_pages = PAGES_PER_SECTION * sections_per_block; struct zone *default_zone; + int len = 0; int nid; /* @@ -341,24 +342,23 @@ static ssize_t valid_zones_show(struct device *dev, default_zone = test_pages_in_a_zone(start_pfn, start_pfn + nr_pages); if (!default_zone) - return sprintf(buf, "none\n"); - strcat(buf, default_zone->name); + return sysfs_emit(buf, "%s\n", "none"); + len += sysfs_emit_at(buf, len, "%s", default_zone->name); goto out; } nid = mem->nid; default_zone = zone_for_pfn_range(MMOP_ONLINE, nid, start_pfn, nr_pages); - strcat(buf, default_zone->name); - print_allowed_zone(buf, nid, start_pfn, nr_pages, MMOP_ONLINE_KERNEL, - default_zone); - print_allowed_zone(buf, nid, start_pfn, nr_pages, MMOP_ONLINE_MOVABLE, - default_zone); + len += sysfs_emit_at(buf, len, "%s", default_zone->name); + len += print_allowed_zone(buf, len, nid, start_pfn, nr_pages, + MMOP_ONLINE_KERNEL, default_zone); + len += print_allowed_zone(buf, len, nid, start_pfn, nr_pages, + MMOP_ONLINE_MOVABLE, default_zone); out: - strcat(buf, "\n"); - - return strlen(buf); + len += sysfs_emit_at(buf, len, "\n"); + return len; } static DEVICE_ATTR_RO(valid_zones); #endif @@ -374,7 +374,7 @@ static DEVICE_ATTR_RO(removable); static ssize_t block_size_bytes_show(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "%lx\n", memory_block_size_bytes()); + return sysfs_emit(buf, "%lx\n", memory_block_size_bytes()); } static DEVICE_ATTR_RO(block_size_bytes); @@ -386,8 +386,8 @@ static DEVICE_ATTR_RO(block_size_bytes); static ssize_t auto_online_blocks_show(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "%s\n", - online_type_to_str[memhp_default_online_type]); + return sysfs_emit(buf, "%s\n", + online_type_to_str[memhp_default_online_type]); } static ssize_t auto_online_blocks_store(struct device *dev, diff --git a/drivers/base/node.c b/drivers/base/node.c index 508b80f6329b..43d21f9e88b1 100644 --- a/drivers/base/node.c +++ b/drivers/base/node.c @@ -46,19 +46,23 @@ static ssize_t node_read_cpumap(struct device *dev, bool list, char *buf) return n; } -static inline ssize_t node_read_cpumask(struct device *dev, - struct device_attribute *attr, char *buf) +static inline ssize_t cpumap_show(struct device *dev, + struct device_attribute *attr, + char *buf) { return node_read_cpumap(dev, false, buf); } -static inline ssize_t node_read_cpulist(struct device *dev, - struct device_attribute *attr, char *buf) + +static DEVICE_ATTR_RO(cpumap); + +static inline ssize_t cpulist_show(struct device *dev, + struct device_attribute *attr, + char *buf) { return node_read_cpumap(dev, true, buf); } -static DEVICE_ATTR(cpumap, S_IRUGO, node_read_cpumask, NULL); -static DEVICE_ATTR(cpulist, S_IRUGO, node_read_cpulist, NULL); +static DEVICE_ATTR_RO(cpulist); /** * struct node_access_nodes - Access class device to hold user visible @@ -153,19 +157,20 @@ free: } #ifdef CONFIG_HMEM_REPORTING -#define ACCESS_ATTR(name) \ -static ssize_t name##_show(struct device *dev, \ - struct device_attribute *attr, \ - char *buf) \ -{ \ - return sprintf(buf, "%u\n", to_access_nodes(dev)->hmem_attrs.name); \ -} \ -static DEVICE_ATTR_RO(name); - -ACCESS_ATTR(read_bandwidth) -ACCESS_ATTR(read_latency) -ACCESS_ATTR(write_bandwidth) -ACCESS_ATTR(write_latency) +#define ACCESS_ATTR(name) \ +static ssize_t name##_show(struct device *dev, \ + struct device_attribute *attr, \ + char *buf) \ +{ \ + return sysfs_emit(buf, "%u\n", \ + to_access_nodes(dev)->hmem_attrs.name); \ +} \ +static DEVICE_ATTR_RO(name) + +ACCESS_ATTR(read_bandwidth); +ACCESS_ATTR(read_latency); +ACCESS_ATTR(write_bandwidth); +ACCESS_ATTR(write_latency); static struct attribute *access_attrs[] = { &dev_attr_read_bandwidth.attr, @@ -225,7 +230,8 @@ static ssize_t name##_show(struct device *dev, \ struct device_attribute *attr, \ char *buf) \ { \ - return sprintf(buf, fmt "\n", to_cache_info(dev)->cache_attrs.name);\ + return sysfs_emit(buf, fmt "\n", \ + to_cache_info(dev)->cache_attrs.name); \ } \ DEVICE_ATTR_RO(name); @@ -361,7 +367,7 @@ static void node_remove_caches(struct node *node) { } static ssize_t node_read_meminfo(struct device *dev, struct device_attribute *attr, char *buf) { - int n; + int len = 0; int nid = dev->id; struct pglist_data *pgdat = NODE_DATA(nid); struct sysinfo i; @@ -370,128 +376,128 @@ static ssize_t node_read_meminfo(struct device *dev, si_meminfo_node(&i, nid); sreclaimable = node_page_state_pages(pgdat, NR_SLAB_RECLAIMABLE_B); sunreclaimable = node_page_state_pages(pgdat, NR_SLAB_UNRECLAIMABLE_B); - n = sprintf(buf, - "Node %d MemTotal: %8lu kB\n" - "Node %d MemFree: %8lu kB\n" - "Node %d MemUsed: %8lu kB\n" - "Node %d Active: %8lu kB\n" - "Node %d Inactive: %8lu kB\n" - "Node %d Active(anon): %8lu kB\n" - "Node %d Inactive(anon): %8lu kB\n" - "Node %d Active(file): %8lu kB\n" - "Node %d Inactive(file): %8lu kB\n" - "Node %d Unevictable: %8lu kB\n" - "Node %d Mlocked: %8lu kB\n", - nid, K(i.totalram), - nid, K(i.freeram), - nid, K(i.totalram - i.freeram), - nid, K(node_page_state(pgdat, NR_ACTIVE_ANON) + - node_page_state(pgdat, NR_ACTIVE_FILE)), - nid, K(node_page_state(pgdat, NR_INACTIVE_ANON) + - node_page_state(pgdat, NR_INACTIVE_FILE)), - nid, K(node_page_state(pgdat, NR_ACTIVE_ANON)), - nid, K(node_page_state(pgdat, NR_INACTIVE_ANON)), - nid, K(node_page_state(pgdat, NR_ACTIVE_FILE)), - nid, K(node_page_state(pgdat, NR_INACTIVE_FILE)), - nid, K(node_page_state(pgdat, NR_UNEVICTABLE)), - nid, K(sum_zone_node_page_state(nid, NR_MLOCK))); + len = sysfs_emit_at(buf, len, + "Node %d MemTotal: %8lu kB\n" + "Node %d MemFree: %8lu kB\n" + "Node %d MemUsed: %8lu kB\n" + "Node %d Active: %8lu kB\n" + "Node %d Inactive: %8lu kB\n" + "Node %d Active(anon): %8lu kB\n" + "Node %d Inactive(anon): %8lu kB\n" + "Node %d Active(file): %8lu kB\n" + "Node %d Inactive(file): %8lu kB\n" + "Node %d Unevictable: %8lu kB\n" + "Node %d Mlocked: %8lu kB\n", + nid, K(i.totalram), + nid, K(i.freeram), + nid, K(i.totalram - i.freeram), + nid, K(node_page_state(pgdat, NR_ACTIVE_ANON) + + node_page_state(pgdat, NR_ACTIVE_FILE)), + nid, K(node_page_state(pgdat, NR_INACTIVE_ANON) + + node_page_state(pgdat, NR_INACTIVE_FILE)), + nid, K(node_page_state(pgdat, NR_ACTIVE_ANON)), + nid, K(node_page_state(pgdat, NR_INACTIVE_ANON)), + nid, K(node_page_state(pgdat, NR_ACTIVE_FILE)), + nid, K(node_page_state(pgdat, NR_INACTIVE_FILE)), + nid, K(node_page_state(pgdat, NR_UNEVICTABLE)), + nid, K(sum_zone_node_page_state(nid, NR_MLOCK))); #ifdef CONFIG_HIGHMEM - n += sprintf(buf + n, - "Node %d HighTotal: %8lu kB\n" - "Node %d HighFree: %8lu kB\n" - "Node %d LowTotal: %8lu kB\n" - "Node %d LowFree: %8lu kB\n", - nid, K(i.totalhigh), - nid, K(i.freehigh), - nid, K(i.totalram - i.totalhigh), - nid, K(i.freeram - i.freehigh)); + len += sysfs_emit_at(buf, len, + "Node %d HighTotal: %8lu kB\n" + "Node %d HighFree: %8lu kB\n" + "Node %d LowTotal: %8lu kB\n" + "Node %d LowFree: %8lu kB\n", + nid, K(i.totalhigh), + nid, K(i.freehigh), + nid, K(i.totalram - i.totalhigh), + nid, K(i.freeram - i.freehigh)); #endif - n += sprintf(buf + n, - "Node %d Dirty: %8lu kB\n" - "Node %d Writeback: %8lu kB\n" - "Node %d FilePages: %8lu kB\n" - "Node %d Mapped: %8lu kB\n" - "Node %d AnonPages: %8lu kB\n" - "Node %d Shmem: %8lu kB\n" - "Node %d KernelStack: %8lu kB\n" + len += sysfs_emit_at(buf, len, + "Node %d Dirty: %8lu kB\n" + "Node %d Writeback: %8lu kB\n" + "Node %d FilePages: %8lu kB\n" + "Node %d Mapped: %8lu kB\n" + "Node %d AnonPages: %8lu kB\n" + "Node %d Shmem: %8lu kB\n" + "Node %d KernelStack: %8lu kB\n" #ifdef CONFIG_SHADOW_CALL_STACK - "Node %d ShadowCallStack:%8lu kB\n" + "Node %d ShadowCallStack:%8lu kB\n" #endif - "Node %d PageTables: %8lu kB\n" - "Node %d NFS_Unstable: %8lu kB\n" - "Node %d Bounce: %8lu kB\n" - "Node %d WritebackTmp: %8lu kB\n" - "Node %d KReclaimable: %8lu kB\n" - "Node %d Slab: %8lu kB\n" - "Node %d SReclaimable: %8lu kB\n" - "Node %d SUnreclaim: %8lu kB\n" + "Node %d PageTables: %8lu kB\n" + "Node %d NFS_Unstable: %8lu kB\n" + "Node %d Bounce: %8lu kB\n" + "Node %d WritebackTmp: %8lu kB\n" + "Node %d KReclaimable: %8lu kB\n" + "Node %d Slab: %8lu kB\n" + "Node %d SReclaimable: %8lu kB\n" + "Node %d SUnreclaim: %8lu kB\n" #ifdef CONFIG_TRANSPARENT_HUGEPAGE - "Node %d AnonHugePages: %8lu kB\n" - "Node %d ShmemHugePages: %8lu kB\n" - "Node %d ShmemPmdMapped: %8lu kB\n" - "Node %d FileHugePages: %8lu kB\n" - "Node %d FilePmdMapped: %8lu kB\n" + "Node %d AnonHugePages: %8lu kB\n" + "Node %d ShmemHugePages: %8lu kB\n" + "Node %d ShmemPmdMapped: %8lu kB\n" + "Node %d FileHugePages: %8lu kB\n" + "Node %d FilePmdMapped: %8lu kB\n" #endif - , - nid, K(node_page_state(pgdat, NR_FILE_DIRTY)), - nid, K(node_page_state(pgdat, NR_WRITEBACK)), - nid, K(node_page_state(pgdat, NR_FILE_PAGES)), - nid, K(node_page_state(pgdat, NR_FILE_MAPPED)), - nid, K(node_page_state(pgdat, NR_ANON_MAPPED)), - nid, K(i.sharedram), - nid, node_page_state(pgdat, NR_KERNEL_STACK_KB), + , + nid, K(node_page_state(pgdat, NR_FILE_DIRTY)), + nid, K(node_page_state(pgdat, NR_WRITEBACK)), + nid, K(node_page_state(pgdat, NR_FILE_PAGES)), + nid, K(node_page_state(pgdat, NR_FILE_MAPPED)), + nid, K(node_page_state(pgdat, NR_ANON_MAPPED)), + nid, K(i.sharedram), + nid, node_page_state(pgdat, NR_KERNEL_STACK_KB), #ifdef CONFIG_SHADOW_CALL_STACK - nid, node_page_state(pgdat, NR_KERNEL_SCS_KB), + nid, node_page_state(pgdat, NR_KERNEL_SCS_KB), #endif - nid, K(sum_zone_node_page_state(nid, NR_PAGETABLE)), - nid, 0UL, - nid, K(sum_zone_node_page_state(nid, NR_BOUNCE)), - nid, K(node_page_state(pgdat, NR_WRITEBACK_TEMP)), - nid, K(sreclaimable + - node_page_state(pgdat, NR_KERNEL_MISC_RECLAIMABLE)), - nid, K(sreclaimable + sunreclaimable), - nid, K(sreclaimable), - nid, K(sunreclaimable) + nid, K(sum_zone_node_page_state(nid, NR_PAGETABLE)), + nid, 0UL, + nid, K(sum_zone_node_page_state(nid, NR_BOUNCE)), + nid, K(node_page_state(pgdat, NR_WRITEBACK_TEMP)), + nid, K(sreclaimable + + node_page_state(pgdat, NR_KERNEL_MISC_RECLAIMABLE)), + nid, K(sreclaimable + sunreclaimable), + nid, K(sreclaimable), + nid, K(sunreclaimable) #ifdef CONFIG_TRANSPARENT_HUGEPAGE - , - nid, K(node_page_state(pgdat, NR_ANON_THPS) * - HPAGE_PMD_NR), - nid, K(node_page_state(pgdat, NR_SHMEM_THPS) * - HPAGE_PMD_NR), - nid, K(node_page_state(pgdat, NR_SHMEM_PMDMAPPED) * - HPAGE_PMD_NR), - nid, K(node_page_state(pgdat, NR_FILE_THPS) * - HPAGE_PMD_NR), - nid, K(node_page_state(pgdat, NR_FILE_PMDMAPPED) * - HPAGE_PMD_NR) + , + nid, K(node_page_state(pgdat, NR_ANON_THPS) * + HPAGE_PMD_NR), + nid, K(node_page_state(pgdat, NR_SHMEM_THPS) * + HPAGE_PMD_NR), + nid, K(node_page_state(pgdat, NR_SHMEM_PMDMAPPED) * + HPAGE_PMD_NR), + nid, K(node_page_state(pgdat, NR_FILE_THPS) * + HPAGE_PMD_NR), + nid, K(node_page_state(pgdat, NR_FILE_PMDMAPPED) * + HPAGE_PMD_NR) #endif - ); - n += hugetlb_report_node_meminfo(nid, buf + n); - return n; + ); + len += hugetlb_report_node_meminfo(buf, len, nid); + return len; } #undef K -static DEVICE_ATTR(meminfo, S_IRUGO, node_read_meminfo, NULL); +static DEVICE_ATTR(meminfo, 0444, node_read_meminfo, NULL); static ssize_t node_read_numastat(struct device *dev, - struct device_attribute *attr, char *buf) + struct device_attribute *attr, char *buf) { - return sprintf(buf, - "numa_hit %lu\n" - "numa_miss %lu\n" - "numa_foreign %lu\n" - "interleave_hit %lu\n" - "local_node %lu\n" - "other_node %lu\n", - sum_zone_numa_state(dev->id, NUMA_HIT), - sum_zone_numa_state(dev->id, NUMA_MISS), - sum_zone_numa_state(dev->id, NUMA_FOREIGN), - sum_zone_numa_state(dev->id, NUMA_INTERLEAVE_HIT), - sum_zone_numa_state(dev->id, NUMA_LOCAL), - sum_zone_numa_state(dev->id, NUMA_OTHER)); + return sysfs_emit(buf, + "numa_hit %lu\n" + "numa_miss %lu\n" + "numa_foreign %lu\n" + "interleave_hit %lu\n" + "local_node %lu\n" + "other_node %lu\n", + sum_zone_numa_state(dev->id, NUMA_HIT), + sum_zone_numa_state(dev->id, NUMA_MISS), + sum_zone_numa_state(dev->id, NUMA_FOREIGN), + sum_zone_numa_state(dev->id, NUMA_INTERLEAVE_HIT), + sum_zone_numa_state(dev->id, NUMA_LOCAL), + sum_zone_numa_state(dev->id, NUMA_OTHER)); } -static DEVICE_ATTR(numastat, S_IRUGO, node_read_numastat, NULL); +static DEVICE_ATTR(numastat, 0444, node_read_numastat, NULL); static ssize_t node_read_vmstat(struct device *dev, struct device_attribute *attr, char *buf) @@ -499,28 +505,31 @@ static ssize_t node_read_vmstat(struct device *dev, int nid = dev->id; struct pglist_data *pgdat = NODE_DATA(nid); int i; - int n = 0; + int len = 0; for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++) - n += sprintf(buf+n, "%s %lu\n", zone_stat_name(i), - sum_zone_node_page_state(nid, i)); + len += sysfs_emit_at(buf, len, "%s %lu\n", + zone_stat_name(i), + sum_zone_node_page_state(nid, i)); #ifdef CONFIG_NUMA for (i = 0; i < NR_VM_NUMA_STAT_ITEMS; i++) - n += sprintf(buf+n, "%s %lu\n", numa_stat_name(i), - sum_zone_numa_state(nid, i)); -#endif + len += sysfs_emit_at(buf, len, "%s %lu\n", + numa_stat_name(i), + sum_zone_numa_state(nid, i)); +#endif for (i = 0; i < NR_VM_NODE_STAT_ITEMS; i++) - n += sprintf(buf+n, "%s %lu\n", node_stat_name(i), - node_page_state_pages(pgdat, i)); + len += sysfs_emit_at(buf, len, "%s %lu\n", + node_stat_name(i), + node_page_state_pages(pgdat, i)); - return n; + return len; } -static DEVICE_ATTR(vmstat, S_IRUGO, node_read_vmstat, NULL); +static DEVICE_ATTR(vmstat, 0444, node_read_vmstat, NULL); static ssize_t node_read_distance(struct device *dev, - struct device_attribute *attr, char *buf) + struct device_attribute *attr, char *buf) { int nid = dev->id; int len = 0; @@ -532,13 +541,15 @@ static ssize_t node_read_distance(struct device *dev, */ BUILD_BUG_ON(MAX_NUMNODES * 4 > PAGE_SIZE); - for_each_online_node(i) - len += sprintf(buf + len, "%s%d", i ? " " : "", node_distance(nid, i)); + for_each_online_node(i) { + len += sysfs_emit_at(buf, len, "%s%d", + i ? " " : "", node_distance(nid, i)); + } - len += sprintf(buf + len, "\n"); + len += sysfs_emit_at(buf, len, "\n"); return len; } -static DEVICE_ATTR(distance, S_IRUGO, node_read_distance, NULL); +static DEVICE_ATTR(distance, 0444, node_read_distance, NULL); static struct attribute *node_dev_attrs[] = { &dev_attr_cpumap.attr, @@ -761,14 +772,36 @@ static int __ref get_nid_for_pfn(unsigned long pfn) return pfn_to_nid(pfn); } +static int do_register_memory_block_under_node(int nid, + struct memory_block *mem_blk) +{ + int ret; + + /* + * If this memory block spans multiple nodes, we only indicate + * the last processed node. + */ + mem_blk->nid = nid; + + ret = sysfs_create_link_nowarn(&node_devices[nid]->dev.kobj, + &mem_blk->dev.kobj, + kobject_name(&mem_blk->dev.kobj)); + if (ret) + return ret; + + return sysfs_create_link_nowarn(&mem_blk->dev.kobj, + &node_devices[nid]->dev.kobj, + kobject_name(&node_devices[nid]->dev.kobj)); +} + /* register memory section under specified node if it spans that node */ -static int register_mem_sect_under_node(struct memory_block *mem_blk, - void *arg) +static int register_mem_block_under_node_early(struct memory_block *mem_blk, + void *arg) { unsigned long memory_block_pfns = memory_block_size_bytes() / PAGE_SIZE; unsigned long start_pfn = section_nr_to_pfn(mem_blk->start_section_nr); unsigned long end_pfn = start_pfn + memory_block_pfns - 1; - int ret, nid = *(int *)arg; + int nid = *(int *)arg; unsigned long pfn; for (pfn = start_pfn; pfn <= end_pfn; pfn++) { @@ -785,39 +818,34 @@ static int register_mem_sect_under_node(struct memory_block *mem_blk, } /* - * We need to check if page belongs to nid only for the boot - * case, during hotplug we know that all pages in the memory - * block belong to the same node. - */ - if (system_state == SYSTEM_BOOTING) { - page_nid = get_nid_for_pfn(pfn); - if (page_nid < 0) - continue; - if (page_nid != nid) - continue; - } - - /* - * If this memory block spans multiple nodes, we only indicate - * the last processed node. + * We need to check if page belongs to nid only at the boot + * case because node's ranges can be interleaved. */ - mem_blk->nid = nid; - - ret = sysfs_create_link_nowarn(&node_devices[nid]->dev.kobj, - &mem_blk->dev.kobj, - kobject_name(&mem_blk->dev.kobj)); - if (ret) - return ret; + page_nid = get_nid_for_pfn(pfn); + if (page_nid < 0) + continue; + if (page_nid != nid) + continue; - return sysfs_create_link_nowarn(&mem_blk->dev.kobj, - &node_devices[nid]->dev.kobj, - kobject_name(&node_devices[nid]->dev.kobj)); + return do_register_memory_block_under_node(nid, mem_blk); } /* mem section does not span the specified node */ return 0; } /* + * During hotplug we know that all pages in the memory block belong to the same + * node. + */ +static int register_mem_block_under_node_hotplug(struct memory_block *mem_blk, + void *arg) +{ + int nid = *(int *)arg; + + return do_register_memory_block_under_node(nid, mem_blk); +} + +/* * Unregister a memory block device under the node it spans. Memory blocks * with multiple nodes cannot be offlined and therefore also never be removed. */ @@ -832,11 +860,19 @@ void unregister_memory_block_under_nodes(struct memory_block *mem_blk) kobject_name(&node_devices[mem_blk->nid]->dev.kobj)); } -int link_mem_sections(int nid, unsigned long start_pfn, unsigned long end_pfn) +int link_mem_sections(int nid, unsigned long start_pfn, unsigned long end_pfn, + enum meminit_context context) { + walk_memory_blocks_func_t func; + + if (context == MEMINIT_HOTPLUG) + func = register_mem_block_under_node_hotplug; + else + func = register_mem_block_under_node_early; + return walk_memory_blocks(PFN_PHYS(start_pfn), PFN_PHYS(end_pfn - start_pfn), (void *)&nid, - register_mem_sect_under_node); + func); } #ifdef CONFIG_HUGETLBFS @@ -945,17 +981,6 @@ void unregister_one_node(int nid) * node states attributes */ -static ssize_t print_nodes_state(enum node_states state, char *buf) -{ - int n; - - n = scnprintf(buf, PAGE_SIZE - 1, "%*pbl", - nodemask_pr_args(&node_states[state])); - buf[n++] = '\n'; - buf[n] = '\0'; - return n; -} - struct node_attr { struct device_attribute attr; enum node_states state; @@ -965,7 +990,9 @@ static ssize_t show_node_state(struct device *dev, struct device_attribute *attr, char *buf) { struct node_attr *na = container_of(attr, struct node_attr, attr); - return print_nodes_state(na->state, buf); + + return sysfs_emit(buf, "%*pbl\n", + nodemask_pr_args(&node_states[na->state])); } #define _NODE_ATTR(name, state) \ @@ -980,6 +1007,8 @@ static struct node_attr node_state_attr[] = { #endif [N_MEMORY] = _NODE_ATTR(has_memory, N_MEMORY), [N_CPU] = _NODE_ATTR(has_cpu, N_CPU), + [N_GENERIC_INITIATOR] = _NODE_ATTR(has_generic_initiator, + N_GENERIC_INITIATOR), }; static struct attribute *node_state_attrs[] = { @@ -991,6 +1020,7 @@ static struct attribute *node_state_attrs[] = { #endif &node_state_attr[N_MEMORY].attr.attr, &node_state_attr[N_CPU].attr.attr, + &node_state_attr[N_GENERIC_INITIATOR].attr.attr, NULL }; diff --git a/drivers/base/platform.c b/drivers/base/platform.c index e5d8a0503b4f..88aef93eb4dd 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -45,6 +45,8 @@ EXPORT_SYMBOL_GPL(platform_bus); * @dev: platform device * @type: resource type * @num: resource index + * + * Return: a pointer to the resource or NULL on failure. */ struct resource *platform_get_resource(struct platform_device *dev, unsigned int type, unsigned int num) @@ -70,6 +72,9 @@ EXPORT_SYMBOL_GPL(platform_get_resource); * resource management * @index: resource index * @res: optional output parameter to store a pointer to the obtained resource. + * + * Return: a pointer to the remapped memory or an ERR_PTR() encoded error code + * on failure. */ void __iomem * devm_platform_get_and_ioremap_resource(struct platform_device *pdev, @@ -91,6 +96,9 @@ EXPORT_SYMBOL_GPL(devm_platform_get_and_ioremap_resource); * @pdev: platform device to use both for memory resource lookup as well as * resource management * @index: resource index + * + * Return: a pointer to the remapped memory or an ERR_PTR() encoded error code + * on failure. */ void __iomem *devm_platform_ioremap_resource(struct platform_device *pdev, unsigned int index) @@ -106,6 +114,9 @@ EXPORT_SYMBOL_GPL(devm_platform_ioremap_resource); * @pdev: platform device to use both for memory resource lookup as well as * resource management * @index: resource index + * + * Return: a pointer to the remapped memory or an ERR_PTR() encoded error code + * on failure. */ void __iomem *devm_platform_ioremap_resource_wc(struct platform_device *pdev, unsigned int index) @@ -124,6 +135,9 @@ void __iomem *devm_platform_ioremap_resource_wc(struct platform_device *pdev, * @pdev: platform device to use both for memory resource lookup as well as * resource management * @name: name of the resource + * + * Return: a pointer to the remapped memory or an ERR_PTR() encoded error code + * on failure. */ void __iomem * devm_platform_ioremap_resource_byname(struct platform_device *pdev, @@ -559,7 +573,7 @@ int platform_device_add(struct platform_device *pdev) * that we remember it must be freed, and we append a suffix * to avoid namespace collision with explicit IDs. */ - ret = ida_simple_get(&platform_devid_ida, 0, 0, GFP_KERNEL); + ret = ida_alloc(&platform_devid_ida, GFP_KERNEL); if (ret < 0) goto err_out; pdev->id = ret; @@ -600,7 +614,7 @@ int platform_device_add(struct platform_device *pdev) failed: if (pdev->id_auto) { - ida_simple_remove(&platform_devid_ida, pdev->id); + ida_free(&platform_devid_ida, pdev->id); pdev->id = PLATFORM_DEVID_AUTO; } @@ -631,7 +645,7 @@ void platform_device_del(struct platform_device *pdev) device_del(&pdev->dev); if (pdev->id_auto) { - ida_simple_remove(&platform_devid_ida, pdev->id); + ida_free(&platform_devid_ida, pdev->id); pdev->id = PLATFORM_DEVID_AUTO; } @@ -1009,10 +1023,10 @@ EXPORT_SYMBOL_GPL(platform_unregister_drivers); * (b) sysfs attribute lets new-style coldplug recover from hotplug events * mishandled before system is fully running: "modprobe $(cat modalias)" */ -static ssize_t modalias_show(struct device *dev, struct device_attribute *a, - char *buf) +static ssize_t modalias_show(struct device *dev, + struct device_attribute *attr, char *buf) { - struct platform_device *pdev = to_platform_device(dev); + struct platform_device *pdev = to_platform_device(dev); int len; len = of_device_modalias(dev, buf, PAGE_SIZE); @@ -1023,9 +1037,7 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *a, if (len != -ENODEV) return len; - len = snprintf(buf, PAGE_SIZE, "platform:%s\n", pdev->name); - - return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len; + return sysfs_emit(buf, "platform:%s\n", pdev->name); } static DEVICE_ATTR_RO(modalias); @@ -1070,16 +1082,17 @@ static ssize_t driver_override_show(struct device *dev, ssize_t len; device_lock(dev); - len = sprintf(buf, "%s\n", pdev->driver_override); + len = sysfs_emit(buf, "%s\n", pdev->driver_override); device_unlock(dev); + return len; } static DEVICE_ATTR_RW(driver_override); static ssize_t numa_node_show(struct device *dev, - struct device_attribute *attr, char *buf) + struct device_attribute *attr, char *buf) { - return sprintf(buf, "%d\n", dev_to_node(dev)); + return sysfs_emit(buf, "%d\n", dev_to_node(dev)); } static DEVICE_ATTR_RO(numa_node); diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 2cb5e04cf86c..05bb4d4401b2 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -123,7 +123,7 @@ static const struct genpd_lock_ops genpd_spin_ops = { #define genpd_lock_interruptible(p) p->lock_ops->lock_interruptible(p) #define genpd_unlock(p) p->lock_ops->unlock(p) -#define genpd_status_on(genpd) (genpd->status == GPD_STATE_ACTIVE) +#define genpd_status_on(genpd) (genpd->status == GENPD_STATE_ON) #define genpd_is_irq_safe(genpd) (genpd->flags & GENPD_FLAG_IRQ_SAFE) #define genpd_is_always_on(genpd) (genpd->flags & GENPD_FLAG_ALWAYS_ON) #define genpd_is_active_wakeup(genpd) (genpd->flags & GENPD_FLAG_ACTIVE_WAKEUP) @@ -222,7 +222,7 @@ static void genpd_update_accounting(struct generic_pm_domain *genpd) * out of off and so update the idle time and vice * versa. */ - if (genpd->status == GPD_STATE_ACTIVE) { + if (genpd->status == GENPD_STATE_ON) { int state_idx = genpd->state_idx; genpd->states[state_idx].idle_time = @@ -497,6 +497,7 @@ static int genpd_power_off(struct generic_pm_domain *genpd, bool one_dev_on, struct pm_domain_data *pdd; struct gpd_link *link; unsigned int not_suspended = 0; + int ret; /* * Do not try to power off the domain in the following situations: @@ -544,26 +545,15 @@ static int genpd_power_off(struct generic_pm_domain *genpd, bool one_dev_on, if (!genpd->gov) genpd->state_idx = 0; - if (genpd->power_off) { - int ret; - - if (atomic_read(&genpd->sd_count) > 0) - return -EBUSY; + /* Don't power off, if a child domain is waiting to power on. */ + if (atomic_read(&genpd->sd_count) > 0) + return -EBUSY; - /* - * If sd_count > 0 at this point, one of the subdomains hasn't - * managed to call genpd_power_on() for the parent yet after - * incrementing it. In that case genpd_power_on() will wait - * for us to drop the lock, so we can call .power_off() and let - * the genpd_power_on() restore power for us (this shouldn't - * happen very often). - */ - ret = _genpd_power_off(genpd, true); - if (ret) - return ret; - } + ret = _genpd_power_off(genpd, true); + if (ret) + return ret; - genpd->status = GPD_STATE_POWER_OFF; + genpd->status = GENPD_STATE_OFF; genpd_update_accounting(genpd); list_for_each_entry(link, &genpd->child_links, child_node) { @@ -616,7 +606,7 @@ static int genpd_power_on(struct generic_pm_domain *genpd, unsigned int depth) if (ret) goto err; - genpd->status = GPD_STATE_ACTIVE; + genpd->status = GENPD_STATE_ON; genpd_update_accounting(genpd); return 0; @@ -961,7 +951,7 @@ static void genpd_sync_power_off(struct generic_pm_domain *genpd, bool use_lock, if (_genpd_power_off(genpd, false)) return; - genpd->status = GPD_STATE_POWER_OFF; + genpd->status = GENPD_STATE_OFF; list_for_each_entry(link, &genpd->child_links, child_node) { genpd_sd_counter_dec(link->parent); @@ -1007,8 +997,7 @@ static void genpd_sync_power_on(struct generic_pm_domain *genpd, bool use_lock, } _genpd_power_on(genpd, false); - - genpd->status = GPD_STATE_ACTIVE; + genpd->status = GENPD_STATE_ON; } /** @@ -1287,7 +1276,7 @@ static int genpd_restore_noirq(struct device *dev) * so make it appear as powered off to genpd_sync_power_on(), * so that it tries to power it on in case it was really off. */ - genpd->status = GPD_STATE_POWER_OFF; + genpd->status = GENPD_STATE_OFF; genpd_sync_power_on(genpd, true, 0); genpd_unlock(genpd); @@ -1777,7 +1766,7 @@ int pm_genpd_init(struct generic_pm_domain *genpd, genpd->gov = gov; INIT_WORK(&genpd->power_off_work, genpd_power_off_work_fn); atomic_set(&genpd->sd_count, 0); - genpd->status = is_off ? GPD_STATE_POWER_OFF : GPD_STATE_ACTIVE; + genpd->status = is_off ? GENPD_STATE_OFF : GENPD_STATE_ON; genpd->device_count = 0; genpd->max_off_time_ns = -1; genpd->max_off_time_changed = true; @@ -2044,8 +2033,9 @@ int of_genpd_add_provider_simple(struct device_node *np, if (genpd->set_performance_state) { ret = dev_pm_opp_of_add_table(&genpd->dev); if (ret) { - dev_err(&genpd->dev, "Failed to add OPP table: %d\n", - ret); + if (ret != -EPROBE_DEFER) + dev_err(&genpd->dev, "Failed to add OPP table: %d\n", + ret); goto unlock; } @@ -2054,7 +2044,7 @@ int of_genpd_add_provider_simple(struct device_node *np, * state. */ genpd->opp_table = dev_pm_opp_get_opp_table(&genpd->dev); - WARN_ON(!genpd->opp_table); + WARN_ON(IS_ERR(genpd->opp_table)); } ret = genpd_add_provider(np, genpd_xlate_simple, genpd); @@ -2111,8 +2101,9 @@ int of_genpd_add_provider_onecell(struct device_node *np, if (genpd->set_performance_state) { ret = dev_pm_opp_of_add_table_indexed(&genpd->dev, i); if (ret) { - dev_err(&genpd->dev, "Failed to add OPP table for index %d: %d\n", - i, ret); + if (ret != -EPROBE_DEFER) + dev_err(&genpd->dev, "Failed to add OPP table for index %d: %d\n", + i, ret); goto error; } @@ -2121,7 +2112,7 @@ int of_genpd_add_provider_onecell(struct device_node *np, * performance state. */ genpd->opp_table = dev_pm_opp_get_opp_table_indexed(&genpd->dev, i); - WARN_ON(!genpd->opp_table); + WARN_ON(IS_ERR(genpd->opp_table)); } genpd->provider = &np->fwnode; @@ -2802,8 +2793,8 @@ static int genpd_summary_one(struct seq_file *s, struct generic_pm_domain *genpd) { static const char * const status_lookup[] = { - [GPD_STATE_ACTIVE] = "on", - [GPD_STATE_POWER_OFF] = "off" + [GENPD_STATE_ON] = "on", + [GENPD_STATE_OFF] = "off" }; struct pm_domain_data *pm_data; const char *kobj_path; @@ -2881,8 +2872,8 @@ static int summary_show(struct seq_file *s, void *data) static int status_show(struct seq_file *s, void *data) { static const char * const status_lookup[] = { - [GPD_STATE_ACTIVE] = "on", - [GPD_STATE_POWER_OFF] = "off" + [GENPD_STATE_ON] = "on", + [GENPD_STATE_OFF] = "off" }; struct generic_pm_domain *genpd = s->private; @@ -2895,7 +2886,7 @@ static int status_show(struct seq_file *s, void *data) if (WARN_ON_ONCE(genpd->status >= ARRAY_SIZE(status_lookup))) goto exit; - if (genpd->status == GPD_STATE_POWER_OFF) + if (genpd->status == GENPD_STATE_OFF) seq_printf(s, "%s-%u\n", status_lookup[genpd->status], genpd->state_idx); else @@ -2938,7 +2929,7 @@ static int idle_states_show(struct seq_file *s, void *data) ktime_t delta = 0; s64 msecs; - if ((genpd->status == GPD_STATE_POWER_OFF) && + if ((genpd->status == GENPD_STATE_OFF) && (genpd->state_idx == i)) delta = ktime_sub(ktime_get(), genpd->accounting_time); @@ -2961,7 +2952,7 @@ static int active_time_show(struct seq_file *s, void *data) if (ret) return -ERESTARTSYS; - if (genpd->status == GPD_STATE_ACTIVE) + if (genpd->status == GENPD_STATE_ON) delta = ktime_sub(ktime_get(), genpd->accounting_time); seq_printf(s, "%lld ms\n", ktime_to_ms( @@ -2984,7 +2975,7 @@ static int total_idle_time_show(struct seq_file *s, void *data) for (i = 0; i < genpd->state_count; i++) { - if ((genpd->status == GPD_STATE_POWER_OFF) && + if ((genpd->status == GENPD_STATE_OFF) && (genpd->state_idx == i)) delta = ktime_sub(ktime_get(), genpd->accounting_time); diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c index 8143210a5c54..6f605f7820bb 100644 --- a/drivers/base/power/runtime.c +++ b/drivers/base/power/runtime.c @@ -291,8 +291,7 @@ static int rpm_get_suppliers(struct device *dev) device_links_read_lock_held()) { int retval; - if (!(link->flags & DL_FLAG_PM_RUNTIME) || - READ_ONCE(link->status) == DL_STATE_SUPPLIER_UNBIND) + if (!(link->flags & DL_FLAG_PM_RUNTIME)) continue; retval = pm_runtime_get_sync(link->supplier); @@ -312,8 +311,6 @@ static void rpm_put_suppliers(struct device *dev) list_for_each_entry_rcu(link, &dev->links.suppliers, c_node, device_links_read_lock_held()) { - if (READ_ONCE(link->status) == DL_STATE_SUPPLIER_UNBIND) - continue; while (refcount_dec_not_one(&link->rpm_active)) pm_runtime_put(link->supplier); diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c index c7b24812523c..a1474fb67db9 100644 --- a/drivers/base/power/sysfs.c +++ b/drivers/base/power/sysfs.c @@ -101,8 +101,8 @@ static const char ctrl_on[] = "on"; static ssize_t control_show(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "%s\n", - dev->power.runtime_auto ? ctrl_auto : ctrl_on); + return sysfs_emit(buf, "%s\n", + dev->power.runtime_auto ? ctrl_auto : ctrl_on); } static ssize_t control_store(struct device * dev, struct device_attribute *attr, @@ -122,67 +122,71 @@ static ssize_t control_store(struct device * dev, struct device_attribute *attr, static DEVICE_ATTR_RW(control); static ssize_t runtime_active_time_show(struct device *dev, - struct device_attribute *attr, char *buf) + struct device_attribute *attr, + char *buf) { - int ret; u64 tmp = pm_runtime_active_time(dev); + do_div(tmp, NSEC_PER_MSEC); - ret = sprintf(buf, "%llu\n", tmp); - return ret; + + return sysfs_emit(buf, "%llu\n", tmp); } static DEVICE_ATTR_RO(runtime_active_time); static ssize_t runtime_suspended_time_show(struct device *dev, - struct device_attribute *attr, char *buf) + struct device_attribute *attr, + char *buf) { - int ret; u64 tmp = pm_runtime_suspended_time(dev); + do_div(tmp, NSEC_PER_MSEC); - ret = sprintf(buf, "%llu\n", tmp); - return ret; + + return sysfs_emit(buf, "%llu\n", tmp); } static DEVICE_ATTR_RO(runtime_suspended_time); static ssize_t runtime_status_show(struct device *dev, - struct device_attribute *attr, char *buf) + struct device_attribute *attr, char *buf) { - const char *p; + const char *output; if (dev->power.runtime_error) { - p = "error\n"; + output = "error"; } else if (dev->power.disable_depth) { - p = "unsupported\n"; + output = "unsupported"; } else { switch (dev->power.runtime_status) { case RPM_SUSPENDED: - p = "suspended\n"; + output = "suspended"; break; case RPM_SUSPENDING: - p = "suspending\n"; + output = "suspending"; break; case RPM_RESUMING: - p = "resuming\n"; + output = "resuming"; break; case RPM_ACTIVE: - p = "active\n"; + output = "active"; break; default: return -EIO; } } - return sprintf(buf, p); + return sysfs_emit(buf, "%s\n", output); } static DEVICE_ATTR_RO(runtime_status); static ssize_t autosuspend_delay_ms_show(struct device *dev, - struct device_attribute *attr, char *buf) + struct device_attribute *attr, + char *buf) { if (!dev->power.use_autosuspend) return -EIO; - return sprintf(buf, "%d\n", dev->power.autosuspend_delay); + + return sysfs_emit(buf, "%d\n", dev->power.autosuspend_delay); } static ssize_t autosuspend_delay_ms_store(struct device *dev, @@ -211,11 +215,11 @@ static ssize_t pm_qos_resume_latency_us_show(struct device *dev, s32 value = dev_pm_qos_requested_resume_latency(dev); if (value == 0) - return sprintf(buf, "n/a\n"); + return sysfs_emit(buf, "n/a\n"); if (value == PM_QOS_RESUME_LATENCY_NO_CONSTRAINT) value = 0; - return sprintf(buf, "%d\n", value); + return sysfs_emit(buf, "%d\n", value); } static ssize_t pm_qos_resume_latency_us_store(struct device *dev, @@ -255,11 +259,11 @@ static ssize_t pm_qos_latency_tolerance_us_show(struct device *dev, s32 value = dev_pm_qos_get_user_latency_tolerance(dev); if (value < 0) - return sprintf(buf, "auto\n"); + return sysfs_emit(buf, "%s\n", "auto"); if (value == PM_QOS_LATENCY_ANY) - return sprintf(buf, "any\n"); + return sysfs_emit(buf, "%s\n", "any"); - return sprintf(buf, "%d\n", value); + return sysfs_emit(buf, "%d\n", value); } static ssize_t pm_qos_latency_tolerance_us_store(struct device *dev, @@ -291,8 +295,8 @@ static ssize_t pm_qos_no_power_off_show(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "%d\n", !!(dev_pm_qos_requested_flags(dev) - & PM_QOS_FLAG_NO_POWER_OFF)); + return sysfs_emit(buf, "%d\n", !!(dev_pm_qos_requested_flags(dev) + & PM_QOS_FLAG_NO_POWER_OFF)); } static ssize_t pm_qos_no_power_off_store(struct device *dev, @@ -320,9 +324,9 @@ static const char _disabled[] = "disabled"; static ssize_t wakeup_show(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "%s\n", device_can_wakeup(dev) - ? (device_may_wakeup(dev) ? _enabled : _disabled) - : ""); + return sysfs_emit(buf, "%s\n", device_can_wakeup(dev) + ? (device_may_wakeup(dev) ? _enabled : _disabled) + : ""); } static ssize_t wakeup_store(struct device *dev, struct device_attribute *attr, @@ -345,7 +349,7 @@ static DEVICE_ATTR_RW(wakeup); static ssize_t wakeup_count_show(struct device *dev, struct device_attribute *attr, char *buf) { - unsigned long count = 0; + unsigned long count; bool enabled = false; spin_lock_irq(&dev->power.lock); @@ -354,7 +358,10 @@ static ssize_t wakeup_count_show(struct device *dev, enabled = true; } spin_unlock_irq(&dev->power.lock); - return enabled ? sprintf(buf, "%lu\n", count) : sprintf(buf, "\n"); + + if (!enabled) + return sysfs_emit(buf, "\n"); + return sysfs_emit(buf, "%lu\n", count); } static DEVICE_ATTR_RO(wakeup_count); @@ -363,7 +370,7 @@ static ssize_t wakeup_active_count_show(struct device *dev, struct device_attribute *attr, char *buf) { - unsigned long count = 0; + unsigned long count; bool enabled = false; spin_lock_irq(&dev->power.lock); @@ -372,7 +379,10 @@ static ssize_t wakeup_active_count_show(struct device *dev, enabled = true; } spin_unlock_irq(&dev->power.lock); - return enabled ? sprintf(buf, "%lu\n", count) : sprintf(buf, "\n"); + + if (!enabled) + return sysfs_emit(buf, "\n"); + return sysfs_emit(buf, "%lu\n", count); } static DEVICE_ATTR_RO(wakeup_active_count); @@ -381,7 +391,7 @@ static ssize_t wakeup_abort_count_show(struct device *dev, struct device_attribute *attr, char *buf) { - unsigned long count = 0; + unsigned long count; bool enabled = false; spin_lock_irq(&dev->power.lock); @@ -390,7 +400,10 @@ static ssize_t wakeup_abort_count_show(struct device *dev, enabled = true; } spin_unlock_irq(&dev->power.lock); - return enabled ? sprintf(buf, "%lu\n", count) : sprintf(buf, "\n"); + + if (!enabled) + return sysfs_emit(buf, "\n"); + return sysfs_emit(buf, "%lu\n", count); } static DEVICE_ATTR_RO(wakeup_abort_count); @@ -399,7 +412,7 @@ static ssize_t wakeup_expire_count_show(struct device *dev, struct device_attribute *attr, char *buf) { - unsigned long count = 0; + unsigned long count; bool enabled = false; spin_lock_irq(&dev->power.lock); @@ -408,7 +421,10 @@ static ssize_t wakeup_expire_count_show(struct device *dev, enabled = true; } spin_unlock_irq(&dev->power.lock); - return enabled ? sprintf(buf, "%lu\n", count) : sprintf(buf, "\n"); + + if (!enabled) + return sysfs_emit(buf, "\n"); + return sysfs_emit(buf, "%lu\n", count); } static DEVICE_ATTR_RO(wakeup_expire_count); @@ -416,7 +432,7 @@ static DEVICE_ATTR_RO(wakeup_expire_count); static ssize_t wakeup_active_show(struct device *dev, struct device_attribute *attr, char *buf) { - unsigned int active = 0; + unsigned int active; bool enabled = false; spin_lock_irq(&dev->power.lock); @@ -425,7 +441,10 @@ static ssize_t wakeup_active_show(struct device *dev, enabled = true; } spin_unlock_irq(&dev->power.lock); - return enabled ? sprintf(buf, "%u\n", active) : sprintf(buf, "\n"); + + if (!enabled) + return sysfs_emit(buf, "\n"); + return sysfs_emit(buf, "%u\n", active); } static DEVICE_ATTR_RO(wakeup_active); @@ -434,7 +453,7 @@ static ssize_t wakeup_total_time_ms_show(struct device *dev, struct device_attribute *attr, char *buf) { - s64 msec = 0; + s64 msec; bool enabled = false; spin_lock_irq(&dev->power.lock); @@ -443,7 +462,10 @@ static ssize_t wakeup_total_time_ms_show(struct device *dev, enabled = true; } spin_unlock_irq(&dev->power.lock); - return enabled ? sprintf(buf, "%lld\n", msec) : sprintf(buf, "\n"); + + if (!enabled) + return sysfs_emit(buf, "\n"); + return sysfs_emit(buf, "%lld\n", msec); } static DEVICE_ATTR_RO(wakeup_total_time_ms); @@ -451,7 +473,7 @@ static DEVICE_ATTR_RO(wakeup_total_time_ms); static ssize_t wakeup_max_time_ms_show(struct device *dev, struct device_attribute *attr, char *buf) { - s64 msec = 0; + s64 msec; bool enabled = false; spin_lock_irq(&dev->power.lock); @@ -460,7 +482,10 @@ static ssize_t wakeup_max_time_ms_show(struct device *dev, enabled = true; } spin_unlock_irq(&dev->power.lock); - return enabled ? sprintf(buf, "%lld\n", msec) : sprintf(buf, "\n"); + + if (!enabled) + return sysfs_emit(buf, "\n"); + return sysfs_emit(buf, "%lld\n", msec); } static DEVICE_ATTR_RO(wakeup_max_time_ms); @@ -469,7 +494,7 @@ static ssize_t wakeup_last_time_ms_show(struct device *dev, struct device_attribute *attr, char *buf) { - s64 msec = 0; + s64 msec; bool enabled = false; spin_lock_irq(&dev->power.lock); @@ -478,7 +503,10 @@ static ssize_t wakeup_last_time_ms_show(struct device *dev, enabled = true; } spin_unlock_irq(&dev->power.lock); - return enabled ? sprintf(buf, "%lld\n", msec) : sprintf(buf, "\n"); + + if (!enabled) + return sysfs_emit(buf, "\n"); + return sysfs_emit(buf, "%lld\n", msec); } static inline int dpm_sysfs_wakeup_change_owner(struct device *dev, kuid_t kuid, @@ -496,7 +524,7 @@ static ssize_t wakeup_prevent_sleep_time_ms_show(struct device *dev, struct device_attribute *attr, char *buf) { - s64 msec = 0; + s64 msec; bool enabled = false; spin_lock_irq(&dev->power.lock); @@ -505,7 +533,10 @@ static ssize_t wakeup_prevent_sleep_time_ms_show(struct device *dev, enabled = true; } spin_unlock_irq(&dev->power.lock); - return enabled ? sprintf(buf, "%lld\n", msec) : sprintf(buf, "\n"); + + if (!enabled) + return sysfs_emit(buf, "\n"); + return sysfs_emit(buf, "%lld\n", msec); } static DEVICE_ATTR_RO(wakeup_prevent_sleep_time_ms); @@ -522,7 +553,7 @@ static inline int dpm_sysfs_wakeup_change_owner(struct device *dev, kuid_t kuid, static ssize_t runtime_usage_show(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "%d\n", atomic_read(&dev->power.usage_count)); + return sysfs_emit(buf, "%d\n", atomic_read(&dev->power.usage_count)); } static DEVICE_ATTR_RO(runtime_usage); @@ -530,21 +561,26 @@ static ssize_t runtime_active_kids_show(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "%d\n", dev->power.ignore_children ? - 0 : atomic_read(&dev->power.child_count)); + return sysfs_emit(buf, "%d\n", dev->power.ignore_children ? + 0 : atomic_read(&dev->power.child_count)); } static DEVICE_ATTR_RO(runtime_active_kids); static ssize_t runtime_enabled_show(struct device *dev, struct device_attribute *attr, char *buf) { - if (dev->power.disable_depth && (dev->power.runtime_auto == false)) - return sprintf(buf, "disabled & forbidden\n"); - if (dev->power.disable_depth) - return sprintf(buf, "disabled\n"); - if (dev->power.runtime_auto == false) - return sprintf(buf, "forbidden\n"); - return sprintf(buf, "enabled\n"); + const char *output; + + if (dev->power.disable_depth && !dev->power.runtime_auto) + output = "disabled & forbidden"; + else if (dev->power.disable_depth) + output = "disabled"; + else if (!dev->power.runtime_auto) + output = "forbidden"; + else + output = "enabled"; + + return sysfs_emit(buf, "%s\n", output); } static DEVICE_ATTR_RO(runtime_enabled); @@ -552,9 +588,9 @@ static DEVICE_ATTR_RO(runtime_enabled); static ssize_t async_show(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "%s\n", - device_async_suspend_enabled(dev) ? - _enabled : _disabled); + return sysfs_emit(buf, "%s\n", + device_async_suspend_enabled(dev) ? + _enabled : _disabled); } static ssize_t async_store(struct device *dev, struct device_attribute *attr, diff --git a/drivers/base/power/wakeup_stats.c b/drivers/base/power/wakeup_stats.c index c7734914d914..d638259b829a 100644 --- a/drivers/base/power/wakeup_stats.c +++ b/drivers/base/power/wakeup_stats.c @@ -26,7 +26,7 @@ static ssize_t _name##_show(struct device *dev, \ { \ struct wakeup_source *ws = dev_get_drvdata(dev); \ \ - return sprintf(buf, "%lu\n", ws->_name); \ + return sysfs_emit(buf, "%lu\n", ws->_name); \ } \ static DEVICE_ATTR_RO(_name) @@ -42,7 +42,7 @@ static ssize_t active_time_ms_show(struct device *dev, ktime_t active_time = ws->active ? ktime_sub(ktime_get(), ws->last_time) : 0; - return sprintf(buf, "%lld\n", ktime_to_ms(active_time)); + return sysfs_emit(buf, "%lld\n", ktime_to_ms(active_time)); } static DEVICE_ATTR_RO(active_time_ms); @@ -57,7 +57,8 @@ static ssize_t total_time_ms_show(struct device *dev, active_time = ktime_sub(ktime_get(), ws->last_time); total_time = ktime_add(total_time, active_time); } - return sprintf(buf, "%lld\n", ktime_to_ms(total_time)); + + return sysfs_emit(buf, "%lld\n", ktime_to_ms(total_time)); } static DEVICE_ATTR_RO(total_time_ms); @@ -73,7 +74,8 @@ static ssize_t max_time_ms_show(struct device *dev, if (active_time > max_time) max_time = active_time; } - return sprintf(buf, "%lld\n", ktime_to_ms(max_time)); + + return sysfs_emit(buf, "%lld\n", ktime_to_ms(max_time)); } static DEVICE_ATTR_RO(max_time_ms); @@ -82,7 +84,7 @@ static ssize_t last_change_ms_show(struct device *dev, { struct wakeup_source *ws = dev_get_drvdata(dev); - return sprintf(buf, "%lld\n", ktime_to_ms(ws->last_time)); + return sysfs_emit(buf, "%lld\n", ktime_to_ms(ws->last_time)); } static DEVICE_ATTR_RO(last_change_ms); @@ -91,7 +93,7 @@ static ssize_t name_show(struct device *dev, struct device_attribute *attr, { struct wakeup_source *ws = dev_get_drvdata(dev); - return sprintf(buf, "%s\n", ws->name); + return sysfs_emit(buf, "%s\n", ws->name); } static DEVICE_ATTR_RO(name); @@ -106,7 +108,8 @@ static ssize_t prevent_suspend_time_ms_show(struct device *dev, prevent_sleep_time = ktime_add(prevent_sleep_time, ktime_sub(ktime_get(), ws->start_prevent_time)); } - return sprintf(buf, "%lld\n", ktime_to_ms(prevent_sleep_time)); + + return sysfs_emit(buf, "%lld\n", ktime_to_ms(prevent_sleep_time)); } static DEVICE_ATTR_RO(prevent_suspend_time_ms); diff --git a/drivers/base/property.c b/drivers/base/property.c index d58aa98fe964..4c43d30145c6 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -1184,3 +1184,76 @@ const void *device_get_match_data(struct device *dev) return fwnode_call_ptr_op(dev_fwnode(dev), device_get_match_data, dev); } EXPORT_SYMBOL_GPL(device_get_match_data); + +static void * +fwnode_graph_devcon_match(struct fwnode_handle *fwnode, const char *con_id, + void *data, devcon_match_fn_t match) +{ + struct fwnode_handle *node; + struct fwnode_handle *ep; + void *ret; + + fwnode_graph_for_each_endpoint(fwnode, ep) { + node = fwnode_graph_get_remote_port_parent(ep); + if (!fwnode_device_is_available(node)) + continue; + + ret = match(node, con_id, data); + fwnode_handle_put(node); + if (ret) { + fwnode_handle_put(ep); + return ret; + } + } + return NULL; +} + +static void * +fwnode_devcon_match(struct fwnode_handle *fwnode, const char *con_id, + void *data, devcon_match_fn_t match) +{ + struct fwnode_handle *node; + void *ret; + int i; + + for (i = 0; ; i++) { + node = fwnode_find_reference(fwnode, con_id, i); + if (IS_ERR(node)) + break; + + ret = match(node, NULL, data); + fwnode_handle_put(node); + if (ret) + return ret; + } + + return NULL; +} + +/** + * fwnode_connection_find_match - Find connection from a device node + * @fwnode: Device node with the connection + * @con_id: Identifier for the connection + * @data: Data for the match function + * @match: Function to check and convert the connection description + * + * Find a connection with unique identifier @con_id between @fwnode and another + * device node. @match will be used to convert the connection description to + * data the caller is expecting to be returned. + */ +void *fwnode_connection_find_match(struct fwnode_handle *fwnode, + const char *con_id, void *data, + devcon_match_fn_t match) +{ + void *ret; + + if (!fwnode || !match) + return NULL; + + ret = fwnode_graph_devcon_match(fwnode, con_id, data, match); + if (ret) + return ret; + + return fwnode_devcon_match(fwnode, con_id, data, match); +} +EXPORT_SYMBOL_GPL(fwnode_connection_find_match); diff --git a/drivers/base/regmap/Kconfig b/drivers/base/regmap/Kconfig index 1d1d26b0d279..bcb90d8c3960 100644 --- a/drivers/base/regmap/Kconfig +++ b/drivers/base/regmap/Kconfig @@ -4,7 +4,7 @@ # subsystems should select the appropriate symbols. config REGMAP - default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_SPMI || REGMAP_W1 || REGMAP_AC97 || REGMAP_MMIO || REGMAP_IRQ || REGMAP_SOUNDWIRE || REGMAP_SCCB || REGMAP_I3C) + default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_SPMI || REGMAP_W1 || REGMAP_AC97 || REGMAP_MMIO || REGMAP_IRQ || REGMAP_SOUNDWIRE || REGMAP_SCCB || REGMAP_I3C || REGMAP_SPI_AVMM) select IRQ_DOMAIN if REGMAP_IRQ bool @@ -53,3 +53,7 @@ config REGMAP_SCCB config REGMAP_I3C tristate depends on I3C + +config REGMAP_SPI_AVMM + tristate + depends on SPI diff --git a/drivers/base/regmap/Makefile b/drivers/base/regmap/Makefile index ff6c7d8ec1cd..ac1b69ee4051 100644 --- a/drivers/base/regmap/Makefile +++ b/drivers/base/regmap/Makefile @@ -17,3 +17,4 @@ obj-$(CONFIG_REGMAP_W1) += regmap-w1.o obj-$(CONFIG_REGMAP_SOUNDWIRE) += regmap-sdw.o obj-$(CONFIG_REGMAP_SCCB) += regmap-sccb.o obj-$(CONFIG_REGMAP_I3C) += regmap-i3c.o +obj-$(CONFIG_REGMAP_SPI_AVMM) += regmap-spi-avmm.o diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h index 3d80c4b43f72..0097696c31de 100644 --- a/drivers/base/regmap/internal.h +++ b/drivers/base/regmap/internal.h @@ -161,6 +161,9 @@ struct regmap { void *selector_work_buf; /* Scratch buffer used for selector */ struct hwspinlock *hwlock; + + /* if set, the regmap core can sleep */ + bool can_sleep; }; struct regcache_ops { @@ -217,7 +220,7 @@ struct regmap_field { #ifdef CONFIG_DEBUG_FS extern void regmap_debugfs_initcall(void); -extern void regmap_debugfs_init(struct regmap *map, const char *name); +extern void regmap_debugfs_init(struct regmap *map); extern void regmap_debugfs_exit(struct regmap *map); static inline void regmap_debugfs_disable(struct regmap *map) @@ -227,7 +230,7 @@ static inline void regmap_debugfs_disable(struct regmap *map) #else static inline void regmap_debugfs_initcall(void) { } -static inline void regmap_debugfs_init(struct regmap *map, const char *name) { } +static inline void regmap_debugfs_init(struct regmap *map) { } static inline void regmap_debugfs_exit(struct regmap *map) { } static inline void regmap_debugfs_disable(struct regmap *map) { } #endif @@ -259,7 +262,7 @@ bool regcache_set_val(struct regmap *map, void *base, unsigned int idx, int regcache_lookup_reg(struct regmap *map, unsigned int reg); int _regmap_raw_write(struct regmap *map, unsigned int reg, - const void *val, size_t val_len); + const void *val, size_t val_len, bool noinc); void regmap_async_complete_cb(struct regmap_async *async, int ret); diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c index a93cafd7be4f..7f4b3b62492c 100644 --- a/drivers/base/regmap/regcache.c +++ b/drivers/base/regmap/regcache.c @@ -717,7 +717,7 @@ static int regcache_sync_block_raw_flush(struct regmap *map, const void **data, map->cache_bypass = true; - ret = _regmap_raw_write(map, base, *data, count * val_bytes); + ret = _regmap_raw_write(map, base, *data, count * val_bytes, false); if (ret) dev_err(map->dev, "Unable to sync registers %#x-%#x. %d\n", base, cur - map->reg_stride, ret); diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c index f58baff2be0a..8dfac7f3ed7a 100644 --- a/drivers/base/regmap/regmap-debugfs.c +++ b/drivers/base/regmap/regmap-debugfs.c @@ -17,7 +17,6 @@ struct regmap_debugfs_node { struct regmap *map; - const char *name; struct list_head link; }; @@ -184,7 +183,7 @@ static inline void regmap_calc_tot_len(struct regmap *map, { /* Calculate the length of a fixed format */ if (!map->debugfs_tot_len) { - map->debugfs_reg_len = regmap_calc_reg_len(map->max_register), + map->debugfs_reg_len = regmap_calc_reg_len(map->max_register); map->debugfs_val_len = 2 * map->format.val_bytes; map->debugfs_tot_len = map->debugfs_reg_len + map->debugfs_val_len + 3; /* : \n */ @@ -544,11 +543,12 @@ static const struct file_operations regmap_cache_bypass_fops = { .write = regmap_cache_bypass_write_file, }; -void regmap_debugfs_init(struct regmap *map, const char *name) +void regmap_debugfs_init(struct regmap *map) { struct rb_node *next; struct regmap_range_node *range_node; const char *devname = "dummy"; + const char *name = map->name; /* * Userspace can initiate reads from the hardware over debugfs. @@ -569,7 +569,6 @@ void regmap_debugfs_init(struct regmap *map, const char *name) if (!node) return; node->map = map; - node->name = name; mutex_lock(®map_debugfs_early_lock); list_add(&node->link, ®map_debugfs_early_list); mutex_unlock(®map_debugfs_early_lock); @@ -679,7 +678,7 @@ void regmap_debugfs_initcall(void) mutex_lock(®map_debugfs_early_lock); list_for_each_entry_safe(node, tmp, ®map_debugfs_early_list, link) { - regmap_debugfs_init(node->map, node->name); + regmap_debugfs_init(node->map); list_del(&node->link); kfree(node); } diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c index 369a57e6f89d..ad5c2de395d1 100644 --- a/drivers/base/regmap/regmap-irq.c +++ b/drivers/base/regmap/regmap-irq.c @@ -168,6 +168,14 @@ static void regmap_irq_sync_unlock(struct irq_data *data) ret = regmap_write(map, reg, ~d->mask_buf[i]); else ret = regmap_write(map, reg, d->mask_buf[i]); + if (d->chip->clear_ack) { + if (d->chip->ack_invert && !ret) + ret = regmap_write(map, reg, + d->mask_buf[i]); + else if (!ret) + ret = regmap_write(map, reg, + ~d->mask_buf[i]); + } if (ret != 0) dev_err(d->map->dev, "Failed to ack 0x%x: %d\n", reg, ret); @@ -493,7 +501,20 @@ static irqreturn_t regmap_irq_thread(int irq, void *d) if (data->status_buf[i] && (chip->ack_base || chip->use_ack)) { reg = chip->ack_base + (i * map->reg_stride * data->irq_reg_stride); - ret = regmap_write(map, reg, data->status_buf[i]); + if (chip->ack_invert) + ret = regmap_write(map, reg, + ~data->status_buf[i]); + else + ret = regmap_write(map, reg, + data->status_buf[i]); + if (chip->clear_ack) { + if (chip->ack_invert && !ret) + ret = regmap_write(map, reg, + data->status_buf[i]); + else if (!ret) + ret = regmap_write(map, reg, + ~data->status_buf[i]); + } if (ret != 0) dev_err(map->dev, "Failed to ack 0x%x: %d\n", reg, ret); @@ -722,6 +743,16 @@ int regmap_add_irq_chip_fwnode(struct fwnode_handle *fwnode, else ret = regmap_write(map, reg, d->status_buf[i] & d->mask_buf[i]); + if (chip->clear_ack) { + if (chip->ack_invert && !ret) + ret = regmap_write(map, reg, + (d->status_buf[i] & + d->mask_buf[i])); + else if (!ret) + ret = regmap_write(map, reg, + ~(d->status_buf[i] & + d->mask_buf[i])); + } if (ret != 0) { dev_err(map->dev, "Failed to ack 0x%x: %d\n", reg, ret); diff --git a/drivers/base/regmap/regmap-sdw.c b/drivers/base/regmap/regmap-sdw.c index 50a66382d87d..c92d614b4943 100644 --- a/drivers/base/regmap/regmap-sdw.c +++ b/drivers/base/regmap/regmap-sdw.c @@ -2,7 +2,6 @@ // Copyright(c) 2015-17 Intel Corporation. #include <linux/device.h> -#include <linux/mod_devicetable.h> #include <linux/module.h> #include <linux/soundwire/sdw.h> #include "internal.h" diff --git a/drivers/base/regmap/regmap-spi-avmm.c b/drivers/base/regmap/regmap-spi-avmm.c new file mode 100644 index 000000000000..ad1da83e849f --- /dev/null +++ b/drivers/base/regmap/regmap-spi-avmm.c @@ -0,0 +1,719 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Register map access API - SPI AVMM support +// +// Copyright (C) 2018-2020 Intel Corporation. All rights reserved. + +#include <linux/module.h> +#include <linux/regmap.h> +#include <linux/spi/spi.h> + +/* + * This driver implements the regmap operations for a generic SPI + * master to access the registers of the spi slave chip which has an + * Avalone bus in it. + * + * The "SPI slave to Avalon Master Bridge" (spi-avmm) IP should be integrated + * in the spi slave chip. The IP acts as a bridge to convert encoded streams of + * bytes from the host to the internal register read/write on Avalon bus. In + * order to issue register access requests to the slave chip, the host should + * send formatted bytes that conform to the transfer protocol. + * The transfer protocol contains 3 layers: transaction layer, packet layer + * and physical layer. + * + * Reference Documents could be found at: + * https://www.intel.com/content/www/us/en/programmable/documentation/sfo1400787952932.html + * + * Chapter "SPI Slave/JTAG to Avalon Master Bridge Cores" is a general + * introduction to the protocol. + * + * Chapter "Avalon Packets to Transactions Converter Core" describes + * the transaction layer. + * + * Chapter "Avalon-ST Bytes to Packets and Packets to Bytes Converter Cores" + * describes the packet layer. + * + * Chapter "Avalon-ST Serial Peripheral Interface Core" describes the + * physical layer. + * + * + * When host issues a regmap read/write, the driver will transform the request + * to byte stream layer by layer. It formats the register addr, value and + * length to the transaction layer request, then converts the request to packet + * layer bytes stream and then to physical layer bytes stream. Finally the + * driver sends the formatted byte stream over SPI bus to the slave chip. + * + * The spi-avmm IP on the slave chip decodes the byte stream and initiates + * register read/write on its internal Avalon bus, and then encodes the + * response to byte stream and sends back to host. + * + * The driver receives the byte stream, reverses the 3 layers transformation, + * and finally gets the response value (read out data for register read, + * successful written size for register write). + */ + +#define PKT_SOP 0x7a +#define PKT_EOP 0x7b +#define PKT_CHANNEL 0x7c +#define PKT_ESC 0x7d + +#define PHY_IDLE 0x4a +#define PHY_ESC 0x4d + +#define TRANS_CODE_WRITE 0x0 +#define TRANS_CODE_SEQ_WRITE 0x4 +#define TRANS_CODE_READ 0x10 +#define TRANS_CODE_SEQ_READ 0x14 +#define TRANS_CODE_NO_TRANS 0x7f + +#define SPI_AVMM_XFER_TIMEOUT (msecs_to_jiffies(200)) + +/* slave's register addr is 32 bits */ +#define SPI_AVMM_REG_SIZE 4UL +/* slave's register value is 32 bits */ +#define SPI_AVMM_VAL_SIZE 4UL + +/* + * max rx size could be larger. But considering the buffer consuming, + * it is proper that we limit 1KB xfer at max. + */ +#define MAX_READ_CNT 256UL +#define MAX_WRITE_CNT 1UL + +struct trans_req_header { + u8 code; + u8 rsvd; + __be16 size; + __be32 addr; +} __packed; + +struct trans_resp_header { + u8 r_code; + u8 rsvd; + __be16 size; +} __packed; + +#define TRANS_REQ_HD_SIZE (sizeof(struct trans_req_header)) +#define TRANS_RESP_HD_SIZE (sizeof(struct trans_resp_header)) + +/* + * In transaction layer, + * the write request format is: Transaction request header + data + * the read request format is: Transaction request header + * the write response format is: Transaction response header + * the read response format is: pure data, no Transaction response header + */ +#define TRANS_WR_TX_SIZE(n) (TRANS_REQ_HD_SIZE + SPI_AVMM_VAL_SIZE * (n)) +#define TRANS_RD_TX_SIZE TRANS_REQ_HD_SIZE +#define TRANS_TX_MAX TRANS_WR_TX_SIZE(MAX_WRITE_CNT) + +#define TRANS_RD_RX_SIZE(n) (SPI_AVMM_VAL_SIZE * (n)) +#define TRANS_WR_RX_SIZE TRANS_RESP_HD_SIZE +#define TRANS_RX_MAX TRANS_RD_RX_SIZE(MAX_READ_CNT) + +/* tx & rx share one transaction layer buffer */ +#define TRANS_BUF_SIZE ((TRANS_TX_MAX > TRANS_RX_MAX) ? \ + TRANS_TX_MAX : TRANS_RX_MAX) + +/* + * In tx phase, the host prepares all the phy layer bytes of a request in the + * phy buffer and sends them in a batch. + * + * The packet layer and physical layer defines several special chars for + * various purpose, when a transaction layer byte hits one of these special + * chars, it should be escaped. The escape rule is, "Escape char first, + * following the byte XOR'ed with 0x20". + * + * This macro defines the max possible length of the phy data. In the worst + * case, all transaction layer bytes need to be escaped (so the data length + * doubles), plus 4 special chars (SOP, CHANNEL, CHANNEL_NUM, EOP). Finally + * we should make sure the length is aligned to SPI BPW. + */ +#define PHY_TX_MAX ALIGN(2 * TRANS_TX_MAX + 4, 4) + +/* + * Unlike tx, phy rx is affected by possible PHY_IDLE bytes from slave, the max + * length of the rx bit stream is unpredictable. So the driver reads the words + * one by one, and parses each word immediately into transaction layer buffer. + * Only one word length of phy buffer is used for rx. + */ +#define PHY_BUF_SIZE PHY_TX_MAX + +/** + * struct spi_avmm_bridge - SPI slave to AVMM bus master bridge + * + * @spi: spi slave associated with this bridge. + * @word_len: bytes of word for spi transfer. + * @trans_len: length of valid data in trans_buf. + * @phy_len: length of valid data in phy_buf. + * @trans_buf: the bridge buffer for transaction layer data. + * @phy_buf: the bridge buffer for physical layer data. + * @swap_words: the word swapping cb for phy data. NULL if not needed. + * + * As a device's registers are implemented on the AVMM bus address space, it + * requires the driver to issue formatted requests to spi slave to AVMM bus + * master bridge to perform register access. + */ +struct spi_avmm_bridge { + struct spi_device *spi; + unsigned char word_len; + unsigned int trans_len; + unsigned int phy_len; + /* bridge buffer used in translation between protocol layers */ + char trans_buf[TRANS_BUF_SIZE]; + char phy_buf[PHY_BUF_SIZE]; + void (*swap_words)(char *buf, unsigned int len); +}; + +static void br_swap_words_32(char *buf, unsigned int len) +{ + u32 *p = (u32 *)buf; + unsigned int count; + + count = len / 4; + while (count--) { + *p = swab32p(p); + p++; + } +} + +/* + * Format transaction layer data in br->trans_buf according to the register + * access request, Store valid transaction layer data length in br->trans_len. + */ +static int br_trans_tx_prepare(struct spi_avmm_bridge *br, bool is_read, u32 reg, + u32 *wr_val, u32 count) +{ + struct trans_req_header *header; + unsigned int trans_len; + u8 code; + __le32 *data; + int i; + + if (is_read) { + if (count == 1) + code = TRANS_CODE_READ; + else + code = TRANS_CODE_SEQ_READ; + } else { + if (count == 1) + code = TRANS_CODE_WRITE; + else + code = TRANS_CODE_SEQ_WRITE; + } + + header = (struct trans_req_header *)br->trans_buf; + header->code = code; + header->rsvd = 0; + header->size = cpu_to_be16((u16)count * SPI_AVMM_VAL_SIZE); + header->addr = cpu_to_be32(reg); + + trans_len = TRANS_REQ_HD_SIZE; + + if (!is_read) { + trans_len += SPI_AVMM_VAL_SIZE * count; + if (trans_len > sizeof(br->trans_buf)) + return -ENOMEM; + + data = (__le32 *)(br->trans_buf + TRANS_REQ_HD_SIZE); + + for (i = 0; i < count; i++) + *data++ = cpu_to_le32(*wr_val++); + } + + /* Store valid trans data length for next layer */ + br->trans_len = trans_len; + + return 0; +} + +/* + * Convert transaction layer data (in br->trans_buf) to phy layer data, store + * them in br->phy_buf. Pad the phy_buf aligned with SPI's BPW. Store valid phy + * layer data length in br->phy_len. + * + * phy_buf len should be aligned with SPI's BPW. Spare bytes should be padded + * with PHY_IDLE, then the slave will just drop them. + * + * The driver will not simply pad 4a at the tail. The concern is that driver + * will not store MISO data during tx phase, if the driver pads 4a at the tail, + * it is possible that if the slave is fast enough to response at the padding + * time. As a result these rx bytes are lost. In the following case, 7a,7c,00 + * will lost. + * MOSI ...|7a|7c|00|10| |00|00|04|02| |4b|7d|5a|7b| |40|4a|4a|4a| |XX|XX|... + * MISO ...|4a|4a|4a|4a| |4a|4a|4a|4a| |4a|4a|4a|4a| |4a|7a|7c|00| |78|56|... + * + * So the driver moves EOP and bytes after EOP to the end of the aligned size, + * then fill the hole with PHY_IDLE. As following: + * before pad ...|7a|7c|00|10| |00|00|04|02| |4b|7d|5a|7b| |40| + * after pad ...|7a|7c|00|10| |00|00|04|02| |4b|7d|5a|4a| |4a|4a|7b|40| + * Then if the slave will not get the entire packet before the tx phase is + * over, it can't responsed to anything either. + */ +static int br_pkt_phy_tx_prepare(struct spi_avmm_bridge *br) +{ + char *tb, *tb_end, *pb, *pb_limit, *pb_eop = NULL; + unsigned int aligned_phy_len, move_size; + bool need_esc = false; + + tb = br->trans_buf; + tb_end = tb + br->trans_len; + pb = br->phy_buf; + pb_limit = pb + ARRAY_SIZE(br->phy_buf); + + *pb++ = PKT_SOP; + + /* + * The driver doesn't support multiple channels so the channel number + * is always 0. + */ + *pb++ = PKT_CHANNEL; + *pb++ = 0x0; + + for (; pb < pb_limit && tb < tb_end; pb++) { + if (need_esc) { + *pb = *tb++ ^ 0x20; + need_esc = false; + continue; + } + + /* EOP should be inserted before the last valid char */ + if (tb == tb_end - 1 && !pb_eop) { + *pb = PKT_EOP; + pb_eop = pb; + continue; + } + + /* + * insert an ESCAPE char if the data value equals any special + * char. + */ + switch (*tb) { + case PKT_SOP: + case PKT_EOP: + case PKT_CHANNEL: + case PKT_ESC: + *pb = PKT_ESC; + need_esc = true; + break; + case PHY_IDLE: + case PHY_ESC: + *pb = PHY_ESC; + need_esc = true; + break; + default: + *pb = *tb++; + break; + } + } + + /* The phy buffer is used out but transaction layer data remains */ + if (tb < tb_end) + return -ENOMEM; + + /* Store valid phy data length for spi transfer */ + br->phy_len = pb - br->phy_buf; + + if (br->word_len == 1) + return 0; + + /* Do phy buf padding if word_len > 1 byte. */ + aligned_phy_len = ALIGN(br->phy_len, br->word_len); + if (aligned_phy_len > sizeof(br->phy_buf)) + return -ENOMEM; + + if (aligned_phy_len == br->phy_len) + return 0; + + /* move EOP and bytes after EOP to the end of aligned size */ + move_size = pb - pb_eop; + memmove(&br->phy_buf[aligned_phy_len - move_size], pb_eop, move_size); + + /* fill the hole with PHY_IDLEs */ + memset(pb_eop, PHY_IDLE, aligned_phy_len - br->phy_len); + + /* update the phy data length */ + br->phy_len = aligned_phy_len; + + return 0; +} + +/* + * In tx phase, the slave only returns PHY_IDLE (0x4a). So the driver will + * ignore rx in tx phase. + */ +static int br_do_tx(struct spi_avmm_bridge *br) +{ + /* reorder words for spi transfer */ + if (br->swap_words) + br->swap_words(br->phy_buf, br->phy_len); + + /* send all data in phy_buf */ + return spi_write(br->spi, br->phy_buf, br->phy_len); +} + +/* + * This function read the rx byte stream from SPI word by word and convert + * them to transaction layer data in br->trans_buf. It also stores the length + * of rx transaction layer data in br->trans_len + * + * The slave may send an unknown number of PHY_IDLEs in rx phase, so we cannot + * prepare a fixed length buffer to receive all of the rx data in a batch. We + * have to read word by word and convert them to transaction layer data at + * once. + */ +static int br_do_rx_and_pkt_phy_parse(struct spi_avmm_bridge *br) +{ + bool eop_found = false, channel_found = false, esc_found = false; + bool valid_word = false, last_try = false; + struct device *dev = &br->spi->dev; + char *pb, *tb_limit, *tb = NULL; + unsigned long poll_timeout; + int ret, i; + + tb_limit = br->trans_buf + ARRAY_SIZE(br->trans_buf); + pb = br->phy_buf; + poll_timeout = jiffies + SPI_AVMM_XFER_TIMEOUT; + while (tb < tb_limit) { + ret = spi_read(br->spi, pb, br->word_len); + if (ret) + return ret; + + /* reorder the word back */ + if (br->swap_words) + br->swap_words(pb, br->word_len); + + valid_word = false; + for (i = 0; i < br->word_len; i++) { + /* drop everything before first SOP */ + if (!tb && pb[i] != PKT_SOP) + continue; + + /* drop PHY_IDLE */ + if (pb[i] == PHY_IDLE) + continue; + + valid_word = true; + + /* + * We don't support multiple channels, so error out if + * a non-zero channel number is found. + */ + if (channel_found) { + if (pb[i] != 0) { + dev_err(dev, "%s channel num != 0\n", + __func__); + return -EFAULT; + } + + channel_found = false; + continue; + } + + switch (pb[i]) { + case PKT_SOP: + /* + * reset the parsing if a second SOP appears. + */ + tb = br->trans_buf; + eop_found = false; + channel_found = false; + esc_found = false; + break; + case PKT_EOP: + /* + * No special char is expected after ESC char. + * No special char (except ESC & PHY_IDLE) is + * expected after EOP char. + * + * The special chars are all dropped. + */ + if (esc_found || eop_found) + return -EFAULT; + + eop_found = true; + break; + case PKT_CHANNEL: + if (esc_found || eop_found) + return -EFAULT; + + channel_found = true; + break; + case PKT_ESC: + case PHY_ESC: + if (esc_found) + return -EFAULT; + + esc_found = true; + break; + default: + /* Record the normal byte in trans_buf. */ + if (esc_found) { + *tb++ = pb[i] ^ 0x20; + esc_found = false; + } else { + *tb++ = pb[i]; + } + + /* + * We get the last normal byte after EOP, it is + * time we finish. Normally the function should + * return here. + */ + if (eop_found) { + br->trans_len = tb - br->trans_buf; + return 0; + } + } + } + + if (valid_word) { + /* update poll timeout when we get valid word */ + poll_timeout = jiffies + SPI_AVMM_XFER_TIMEOUT; + last_try = false; + } else { + /* + * We timeout when rx keeps invalid for some time. But + * it is possible we are scheduled out for long time + * after a spi_read. So when we are scheduled in, a SW + * timeout happens. But actually HW may have worked fine and + * has been ready long time ago. So we need to do an extra + * read, if we get a valid word then we could continue rx, + * otherwise real a HW issue happens. + */ + if (last_try) + return -ETIMEDOUT; + + if (time_after(jiffies, poll_timeout)) + last_try = true; + } + } + + /* + * We have used out all transfer layer buffer but cannot find the end + * of the byte stream. + */ + dev_err(dev, "%s transfer buffer is full but rx doesn't end\n", + __func__); + + return -EFAULT; +} + +/* + * For read transactions, the avmm bus will directly return register values + * without transaction response header. + */ +static int br_rd_trans_rx_parse(struct spi_avmm_bridge *br, + u32 *val, unsigned int expected_count) +{ + unsigned int i, trans_len = br->trans_len; + __le32 *data; + + if (expected_count * SPI_AVMM_VAL_SIZE != trans_len) + return -EFAULT; + + data = (__le32 *)br->trans_buf; + for (i = 0; i < expected_count; i++) + *val++ = le32_to_cpu(*data++); + + return 0; +} + +/* + * For write transactions, the slave will return a transaction response + * header. + */ +static int br_wr_trans_rx_parse(struct spi_avmm_bridge *br, + unsigned int expected_count) +{ + unsigned int trans_len = br->trans_len; + struct trans_resp_header *resp; + u8 code; + u16 val_len; + + if (trans_len != TRANS_RESP_HD_SIZE) + return -EFAULT; + + resp = (struct trans_resp_header *)br->trans_buf; + + code = resp->r_code ^ 0x80; + val_len = be16_to_cpu(resp->size); + if (!val_len || val_len != expected_count * SPI_AVMM_VAL_SIZE) + return -EFAULT; + + /* error out if the trans code doesn't align with the val size */ + if ((val_len == SPI_AVMM_VAL_SIZE && code != TRANS_CODE_WRITE) || + (val_len > SPI_AVMM_VAL_SIZE && code != TRANS_CODE_SEQ_WRITE)) + return -EFAULT; + + return 0; +} + +static int do_reg_access(void *context, bool is_read, unsigned int reg, + unsigned int *value, unsigned int count) +{ + struct spi_avmm_bridge *br = context; + int ret; + + /* invalidate bridge buffers first */ + br->trans_len = 0; + br->phy_len = 0; + + ret = br_trans_tx_prepare(br, is_read, reg, value, count); + if (ret) + return ret; + + ret = br_pkt_phy_tx_prepare(br); + if (ret) + return ret; + + ret = br_do_tx(br); + if (ret) + return ret; + + ret = br_do_rx_and_pkt_phy_parse(br); + if (ret) + return ret; + + if (is_read) + return br_rd_trans_rx_parse(br, value, count); + else + return br_wr_trans_rx_parse(br, count); +} + +static int regmap_spi_avmm_gather_write(void *context, + const void *reg_buf, size_t reg_len, + const void *val_buf, size_t val_len) +{ + if (reg_len != SPI_AVMM_REG_SIZE) + return -EINVAL; + + if (!IS_ALIGNED(val_len, SPI_AVMM_VAL_SIZE)) + return -EINVAL; + + return do_reg_access(context, false, *(u32 *)reg_buf, (u32 *)val_buf, + val_len / SPI_AVMM_VAL_SIZE); +} + +static int regmap_spi_avmm_write(void *context, const void *data, size_t bytes) +{ + if (bytes < SPI_AVMM_REG_SIZE + SPI_AVMM_VAL_SIZE) + return -EINVAL; + + return regmap_spi_avmm_gather_write(context, data, SPI_AVMM_REG_SIZE, + data + SPI_AVMM_REG_SIZE, + bytes - SPI_AVMM_REG_SIZE); +} + +static int regmap_spi_avmm_read(void *context, + const void *reg_buf, size_t reg_len, + void *val_buf, size_t val_len) +{ + if (reg_len != SPI_AVMM_REG_SIZE) + return -EINVAL; + + if (!IS_ALIGNED(val_len, SPI_AVMM_VAL_SIZE)) + return -EINVAL; + + return do_reg_access(context, true, *(u32 *)reg_buf, val_buf, + (val_len / SPI_AVMM_VAL_SIZE)); +} + +static struct spi_avmm_bridge * +spi_avmm_bridge_ctx_gen(struct spi_device *spi) +{ + struct spi_avmm_bridge *br; + + if (!spi) + return ERR_PTR(-ENODEV); + + /* Only support BPW == 8 or 32 now. Try 32 BPW first. */ + spi->mode = SPI_MODE_1; + spi->bits_per_word = 32; + if (spi_setup(spi)) { + spi->bits_per_word = 8; + if (spi_setup(spi)) + return ERR_PTR(-EINVAL); + } + + br = kzalloc(sizeof(*br), GFP_KERNEL); + if (!br) + return ERR_PTR(-ENOMEM); + + br->spi = spi; + br->word_len = spi->bits_per_word / 8; + if (br->word_len == 4) { + /* + * The protocol requires little endian byte order but MSB + * first. So driver needs to swap the byte order word by word + * if word length > 1. + */ + br->swap_words = br_swap_words_32; + } + + return br; +} + +static void spi_avmm_bridge_ctx_free(void *context) +{ + kfree(context); +} + +static const struct regmap_bus regmap_spi_avmm_bus = { + .write = regmap_spi_avmm_write, + .gather_write = regmap_spi_avmm_gather_write, + .read = regmap_spi_avmm_read, + .reg_format_endian_default = REGMAP_ENDIAN_NATIVE, + .val_format_endian_default = REGMAP_ENDIAN_NATIVE, + .max_raw_read = SPI_AVMM_VAL_SIZE * MAX_READ_CNT, + .max_raw_write = SPI_AVMM_VAL_SIZE * MAX_WRITE_CNT, + .free_context = spi_avmm_bridge_ctx_free, +}; + +struct regmap *__regmap_init_spi_avmm(struct spi_device *spi, + const struct regmap_config *config, + struct lock_class_key *lock_key, + const char *lock_name) +{ + struct spi_avmm_bridge *bridge; + struct regmap *map; + + bridge = spi_avmm_bridge_ctx_gen(spi); + if (IS_ERR(bridge)) + return ERR_CAST(bridge); + + map = __regmap_init(&spi->dev, ®map_spi_avmm_bus, + bridge, config, lock_key, lock_name); + if (IS_ERR(map)) { + spi_avmm_bridge_ctx_free(bridge); + return ERR_CAST(map); + } + + return map; +} +EXPORT_SYMBOL_GPL(__regmap_init_spi_avmm); + +struct regmap *__devm_regmap_init_spi_avmm(struct spi_device *spi, + const struct regmap_config *config, + struct lock_class_key *lock_key, + const char *lock_name) +{ + struct spi_avmm_bridge *bridge; + struct regmap *map; + + bridge = spi_avmm_bridge_ctx_gen(spi); + if (IS_ERR(bridge)) + return ERR_CAST(bridge); + + map = __devm_regmap_init(&spi->dev, ®map_spi_avmm_bus, + bridge, config, lock_key, lock_name); + if (IS_ERR(map)) { + spi_avmm_bridge_ctx_free(bridge); + return ERR_CAST(map); + } + + return map; +} +EXPORT_SYMBOL_GPL(__devm_regmap_init_spi_avmm); + +MODULE_LICENSE("GPL v2"); diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index e93700af7e6e..5db536ccfcd6 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -209,6 +209,18 @@ static bool regmap_volatile_range(struct regmap *map, unsigned int reg, return true; } +static void regmap_format_12_20_write(struct regmap *map, + unsigned int reg, unsigned int val) +{ + u8 *out = map->work_buf; + + out[0] = reg >> 4; + out[1] = (reg << 4) | (val >> 16); + out[2] = val >> 8; + out[3] = val; +} + + static void regmap_format_2_6_write(struct regmap *map, unsigned int reg, unsigned int val) { @@ -581,14 +593,34 @@ static void regmap_range_exit(struct regmap *map) kfree(map->selector_work_buf); } +static int regmap_set_name(struct regmap *map, const struct regmap_config *config) +{ + if (config->name) { + const char *name = kstrdup_const(config->name, GFP_KERNEL); + + if (!name) + return -ENOMEM; + + kfree_const(map->name); + map->name = name; + } + + return 0; +} + int regmap_attach_dev(struct device *dev, struct regmap *map, const struct regmap_config *config) { struct regmap **m; + int ret; map->dev = dev; - regmap_debugfs_init(map, config->name); + ret = regmap_set_name(map, config); + if (ret) + return ret; + + regmap_debugfs_init(map); /* Add a devres resource for dev_get_regmap() */ m = devres_alloc(dev_get_regmap_release, sizeof(*m), GFP_KERNEL); @@ -687,21 +719,21 @@ struct regmap *__regmap_init(struct device *dev, goto err; } - if (config->name) { - map->name = kstrdup_const(config->name, GFP_KERNEL); - if (!map->name) { - ret = -ENOMEM; - goto err_map; - } - } + ret = regmap_set_name(map, config); + if (ret) + goto err_map; + + ret = -EINVAL; /* Later error paths rely on this */ if (config->disable_locking) { map->lock = map->unlock = regmap_lock_unlock_none; + map->can_sleep = config->can_sleep; regmap_debugfs_disable(map); } else if (config->lock && config->unlock) { map->lock = config->lock; map->unlock = config->unlock; map->lock_arg = config->lock_arg; + map->can_sleep = config->can_sleep; } else if (config->use_hwlock) { map->hwlock = hwspin_lock_request_specific(config->hwlock_id); if (!map->hwlock) { @@ -737,6 +769,7 @@ struct regmap *__regmap_init(struct device *dev, mutex_init(&map->mutex); map->lock = regmap_lock_mutex; map->unlock = regmap_unlock_mutex; + map->can_sleep = true; lockdep_set_class_and_name(&map->mutex, lock_key, lock_name); } @@ -867,6 +900,16 @@ struct regmap *__regmap_init(struct device *dev, } break; + case 12: + switch (config->val_bits) { + case 20: + map->format.format_write = regmap_format_12_20_write; + break; + default: + goto err_hwlock; + } + break; + case 8: map->format.format_reg = regmap_format_8; break; @@ -1137,7 +1180,7 @@ skip_format_initialization: if (ret != 0) goto err_regcache; } else { - regmap_debugfs_init(map, config->name); + regmap_debugfs_init(map); } return map; @@ -1227,6 +1270,106 @@ struct regmap_field *devm_regmap_field_alloc(struct device *dev, } EXPORT_SYMBOL_GPL(devm_regmap_field_alloc); + +/** + * regmap_field_bulk_alloc() - Allocate and initialise a bulk register field. + * + * @regmap: regmap bank in which this register field is located. + * @rm_field: regmap register fields within the bank. + * @reg_field: Register fields within the bank. + * @num_fields: Number of register fields. + * + * The return value will be an -ENOMEM on error or zero for success. + * Newly allocated regmap_fields should be freed by calling + * regmap_field_bulk_free() + */ +int regmap_field_bulk_alloc(struct regmap *regmap, + struct regmap_field **rm_field, + struct reg_field *reg_field, + int num_fields) +{ + struct regmap_field *rf; + int i; + + rf = kcalloc(num_fields, sizeof(*rf), GFP_KERNEL); + if (!rf) + return -ENOMEM; + + for (i = 0; i < num_fields; i++) { + regmap_field_init(&rf[i], regmap, reg_field[i]); + rm_field[i] = &rf[i]; + } + + return 0; +} +EXPORT_SYMBOL_GPL(regmap_field_bulk_alloc); + +/** + * devm_regmap_field_bulk_alloc() - Allocate and initialise a bulk register + * fields. + * + * @dev: Device that will be interacted with + * @regmap: regmap bank in which this register field is located. + * @rm_field: regmap register fields within the bank. + * @reg_field: Register fields within the bank. + * @num_fields: Number of register fields. + * + * The return value will be an -ENOMEM on error or zero for success. + * Newly allocated regmap_fields will be automatically freed by the + * device management code. + */ +int devm_regmap_field_bulk_alloc(struct device *dev, + struct regmap *regmap, + struct regmap_field **rm_field, + struct reg_field *reg_field, + int num_fields) +{ + struct regmap_field *rf; + int i; + + rf = devm_kcalloc(dev, num_fields, sizeof(*rf), GFP_KERNEL); + if (!rf) + return -ENOMEM; + + for (i = 0; i < num_fields; i++) { + regmap_field_init(&rf[i], regmap, reg_field[i]); + rm_field[i] = &rf[i]; + } + + return 0; +} +EXPORT_SYMBOL_GPL(devm_regmap_field_bulk_alloc); + +/** + * regmap_field_bulk_free() - Free register field allocated using + * regmap_field_bulk_alloc. + * + * @field: regmap fields which should be freed. + */ +void regmap_field_bulk_free(struct regmap_field *field) +{ + kfree(field); +} +EXPORT_SYMBOL_GPL(regmap_field_bulk_free); + +/** + * devm_regmap_field_bulk_free() - Free a bulk register field allocated using + * devm_regmap_field_bulk_alloc. + * + * @dev: Device that will be interacted with + * @field: regmap field which should be freed. + * + * Free register field allocated using devm_regmap_field_bulk_alloc(). Usually + * drivers need not call this function, as the memory allocated via devm + * will be freed as per device-driver life-cycle. + */ +void devm_regmap_field_bulk_free(struct device *dev, + struct regmap_field *field) +{ + devm_kfree(dev, field); +} +EXPORT_SYMBOL_GPL(devm_regmap_field_bulk_free); + /** * devm_regmap_field_free() - Free a register field allocated using * devm_regmap_field_alloc. @@ -1297,6 +1440,8 @@ EXPORT_SYMBOL_GPL(regmap_field_free); */ int regmap_reinit_cache(struct regmap *map, const struct regmap_config *config) { + int ret; + regcache_exit(map); regmap_debugfs_exit(map); @@ -1309,7 +1454,11 @@ int regmap_reinit_cache(struct regmap *map, const struct regmap_config *config) map->readable_noinc_reg = config->readable_noinc_reg; map->cache_type = config->cache_type; - regmap_debugfs_init(map, config->name); + ret = regmap_set_name(map, config); + if (ret) + return ret; + + regmap_debugfs_init(map); map->cache_bypass = false; map->cache_only = false; @@ -1343,6 +1492,8 @@ void regmap_exit(struct regmap *map) } if (map->hwlock) hwspin_lock_free(map->hwlock); + if (map->lock == regmap_lock_mutex) + mutex_destroy(&map->mutex); kfree_const(map->name); kfree(map->patch); kfree(map); @@ -1464,7 +1615,7 @@ static void regmap_set_work_buf_flag_mask(struct regmap *map, int max_bytes, } static int _regmap_raw_write_impl(struct regmap *map, unsigned int reg, - const void *val, size_t val_len) + const void *val, size_t val_len, bool noinc) { struct regmap_range_node *range; unsigned long flags; @@ -1523,7 +1674,7 @@ static int _regmap_raw_write_impl(struct regmap *map, unsigned int reg, win_residue, val_len / map->format.val_bytes); ret = _regmap_raw_write_impl(map, reg, val, win_residue * - map->format.val_bytes); + map->format.val_bytes, noinc); if (ret != 0) return ret; @@ -1537,7 +1688,7 @@ static int _regmap_raw_write_impl(struct regmap *map, unsigned int reg, win_residue = range->window_len - win_offset; } - ret = _regmap_select_page(map, ®, range, val_num); + ret = _regmap_select_page(map, ®, range, noinc ? 1 : val_num); if (ret != 0) return ret; } @@ -1745,7 +1896,8 @@ static int _regmap_bus_raw_write(void *context, unsigned int reg, map->work_buf + map->format.reg_bytes + map->format.pad_bytes, - map->format.val_bytes); + map->format.val_bytes, + false); } static inline void *_regmap_map_get_context(struct regmap *map) @@ -1839,7 +1991,7 @@ int regmap_write_async(struct regmap *map, unsigned int reg, unsigned int val) EXPORT_SYMBOL_GPL(regmap_write_async); int _regmap_raw_write(struct regmap *map, unsigned int reg, - const void *val, size_t val_len) + const void *val, size_t val_len, bool noinc) { size_t val_bytes = map->format.val_bytes; size_t val_count = val_len / val_bytes; @@ -1860,7 +2012,7 @@ int _regmap_raw_write(struct regmap *map, unsigned int reg, /* Write as many bytes as possible with chunk_size */ for (i = 0; i < chunk_count; i++) { - ret = _regmap_raw_write_impl(map, reg, val, chunk_bytes); + ret = _regmap_raw_write_impl(map, reg, val, chunk_bytes, noinc); if (ret) return ret; @@ -1871,7 +2023,7 @@ int _regmap_raw_write(struct regmap *map, unsigned int reg, /* Write remaining bytes */ if (val_len) - ret = _regmap_raw_write_impl(map, reg, val, val_len); + ret = _regmap_raw_write_impl(map, reg, val, val_len, noinc); return ret; } @@ -1904,7 +2056,7 @@ int regmap_raw_write(struct regmap *map, unsigned int reg, map->lock(map->lock_arg); - ret = _regmap_raw_write(map, reg, val, val_len); + ret = _regmap_raw_write(map, reg, val, val_len, false); map->unlock(map->lock_arg); @@ -1962,7 +2114,7 @@ int regmap_noinc_write(struct regmap *map, unsigned int reg, write_len = map->max_raw_write; else write_len = val_len; - ret = _regmap_raw_write(map, reg, val, write_len); + ret = _regmap_raw_write(map, reg, val, write_len, true); if (ret) goto out_unlock; val = ((u8 *)val) + write_len; @@ -2230,8 +2382,12 @@ static int _regmap_range_multi_paged_reg_write(struct regmap *map, if (ret != 0) return ret; - if (regs[i].delay_us) - udelay(regs[i].delay_us); + if (regs[i].delay_us) { + if (map->can_sleep) + fsleep(regs[i].delay_us); + else + udelay(regs[i].delay_us); + } base += n; n = 0; @@ -2267,8 +2423,12 @@ static int _regmap_multi_reg_write(struct regmap *map, if (ret != 0) return ret; - if (regs[i].delay_us) - udelay(regs[i].delay_us); + if (regs[i].delay_us) { + if (map->can_sleep) + fsleep(regs[i].delay_us); + else + udelay(regs[i].delay_us); + } } return 0; } @@ -2439,7 +2599,7 @@ int regmap_raw_write_async(struct regmap *map, unsigned int reg, map->async = true; - ret = _regmap_raw_write(map, reg, val, val_len); + ret = _regmap_raw_write(map, reg, val, val_len, false); map->async = false; @@ -2450,7 +2610,7 @@ int regmap_raw_write_async(struct regmap *map, unsigned int reg, EXPORT_SYMBOL_GPL(regmap_raw_write_async); static int _regmap_raw_read(struct regmap *map, unsigned int reg, void *val, - unsigned int val_len) + unsigned int val_len, bool noinc) { struct regmap_range_node *range; int ret; @@ -2463,7 +2623,7 @@ static int _regmap_raw_read(struct regmap *map, unsigned int reg, void *val, range = _regmap_range_lookup(map, reg); if (range) { ret = _regmap_select_page(map, ®, range, - val_len / map->format.val_bytes); + noinc ? 1 : val_len / map->format.val_bytes); if (ret != 0) return ret; } @@ -2501,7 +2661,7 @@ static int _regmap_bus_read(void *context, unsigned int reg, if (!map->format.parse_val) return -EINVAL; - ret = _regmap_raw_read(map, reg, work_val, map->format.val_bytes); + ret = _regmap_raw_read(map, reg, work_val, map->format.val_bytes, false); if (ret == 0) *val = map->format.parse_val(work_val); @@ -2617,7 +2777,7 @@ int regmap_raw_read(struct regmap *map, unsigned int reg, void *val, /* Read bytes that fit into whole chunks */ for (i = 0; i < chunk_count; i++) { - ret = _regmap_raw_read(map, reg, val, chunk_bytes); + ret = _regmap_raw_read(map, reg, val, chunk_bytes, false); if (ret != 0) goto out; @@ -2628,7 +2788,7 @@ int regmap_raw_read(struct regmap *map, unsigned int reg, void *val, /* Read remaining bytes */ if (val_len) { - ret = _regmap_raw_read(map, reg, val, val_len); + ret = _regmap_raw_read(map, reg, val, val_len, false); if (ret != 0) goto out; } @@ -2703,7 +2863,7 @@ int regmap_noinc_read(struct regmap *map, unsigned int reg, read_len = map->max_raw_read; else read_len = val_len; - ret = _regmap_raw_read(map, reg, val, read_len); + ret = _regmap_raw_read(map, reg, val, read_len, true); if (ret) goto out_unlock; val = ((u8 *)val) + read_len; diff --git a/drivers/base/soc.c b/drivers/base/soc.c index a5bae551167d..d34609bb7386 100644 --- a/drivers/base/soc.c +++ b/drivers/base/soc.c @@ -17,9 +17,9 @@ static DEFINE_IDA(soc_ida); -static ssize_t soc_info_get(struct device *dev, - struct device_attribute *attr, - char *buf); +/* Prototype to allow declarations of DEVICE_ATTR(<foo>) before soc_info_show */ +static ssize_t soc_info_show(struct device *dev, struct device_attribute *attr, + char *buf); struct soc_device { struct device dev; @@ -31,11 +31,11 @@ static struct bus_type soc_bus_type = { .name = "soc", }; -static DEVICE_ATTR(machine, S_IRUGO, soc_info_get, NULL); -static DEVICE_ATTR(family, S_IRUGO, soc_info_get, NULL); -static DEVICE_ATTR(serial_number, S_IRUGO, soc_info_get, NULL); -static DEVICE_ATTR(soc_id, S_IRUGO, soc_info_get, NULL); -static DEVICE_ATTR(revision, S_IRUGO, soc_info_get, NULL); +static DEVICE_ATTR(machine, 0444, soc_info_show, NULL); +static DEVICE_ATTR(family, 0444, soc_info_show, NULL); +static DEVICE_ATTR(serial_number, 0444, soc_info_show, NULL); +static DEVICE_ATTR(soc_id, 0444, soc_info_show, NULL); +static DEVICE_ATTR(revision, 0444, soc_info_show, NULL); struct device *soc_device_to_device(struct soc_device *soc_dev) { @@ -49,45 +49,41 @@ static umode_t soc_attribute_mode(struct kobject *kobj, struct device *dev = kobj_to_dev(kobj); struct soc_device *soc_dev = container_of(dev, struct soc_device, dev); - if ((attr == &dev_attr_machine.attr) - && (soc_dev->attr->machine != NULL)) + if ((attr == &dev_attr_machine.attr) && soc_dev->attr->machine) return attr->mode; - if ((attr == &dev_attr_family.attr) - && (soc_dev->attr->family != NULL)) + if ((attr == &dev_attr_family.attr) && soc_dev->attr->family) return attr->mode; - if ((attr == &dev_attr_revision.attr) - && (soc_dev->attr->revision != NULL)) + if ((attr == &dev_attr_revision.attr) && soc_dev->attr->revision) return attr->mode; - if ((attr == &dev_attr_serial_number.attr) - && (soc_dev->attr->serial_number != NULL)) + if ((attr == &dev_attr_serial_number.attr) && soc_dev->attr->serial_number) return attr->mode; - if ((attr == &dev_attr_soc_id.attr) - && (soc_dev->attr->soc_id != NULL)) + if ((attr == &dev_attr_soc_id.attr) && soc_dev->attr->soc_id) return attr->mode; - /* Unknown or unfilled attribute. */ + /* Unknown or unfilled attribute */ return 0; } -static ssize_t soc_info_get(struct device *dev, - struct device_attribute *attr, - char *buf) +static ssize_t soc_info_show(struct device *dev, struct device_attribute *attr, + char *buf) { struct soc_device *soc_dev = container_of(dev, struct soc_device, dev); + const char *output; if (attr == &dev_attr_machine) - return sprintf(buf, "%s\n", soc_dev->attr->machine); - if (attr == &dev_attr_family) - return sprintf(buf, "%s\n", soc_dev->attr->family); - if (attr == &dev_attr_revision) - return sprintf(buf, "%s\n", soc_dev->attr->revision); - if (attr == &dev_attr_serial_number) - return sprintf(buf, "%s\n", soc_dev->attr->serial_number); - if (attr == &dev_attr_soc_id) - return sprintf(buf, "%s\n", soc_dev->attr->soc_id); - - return -EINVAL; - + output = soc_dev->attr->machine; + else if (attr == &dev_attr_family) + output = soc_dev->attr->family; + else if (attr == &dev_attr_revision) + output = soc_dev->attr->revision; + else if (attr == &dev_attr_serial_number) + output = soc_dev->attr->serial_number; + else if (attr == &dev_attr_soc_id) + output = soc_dev->attr->soc_id; + else + return -EINVAL; + + return sysfs_emit(buf, "%s\n", output); } static struct attribute *soc_attr[] = { diff --git a/drivers/base/syscore.c b/drivers/base/syscore.c index 0d346a307140..13db1f78d2ce 100644 --- a/drivers/base/syscore.c +++ b/drivers/base/syscore.c @@ -50,7 +50,7 @@ int syscore_suspend(void) int ret = 0; trace_suspend_resume(TPS("syscore_suspend"), 0, true); - pr_debug("Checking wakeup interrupts\n"); + pm_pr_dbg("Checking wakeup interrupts\n"); /* Return error code if there are any wakeup interrupts pending. */ if (pm_wakeup_pending()) @@ -61,8 +61,7 @@ int syscore_suspend(void) list_for_each_entry_reverse(ops, &syscore_ops_list, node) if (ops->suspend) { - if (initcall_debug) - pr_info("PM: Calling %pS\n", ops->suspend); + pm_pr_dbg("Calling %pS\n", ops->suspend); ret = ops->suspend(); if (ret) goto err_out; @@ -99,8 +98,7 @@ void syscore_resume(void) list_for_each_entry(ops, &syscore_ops_list, node) if (ops->resume) { - if (initcall_debug) - pr_info("PM: Calling %pS\n", ops->resume); + pm_pr_dbg("Calling %pS\n", ops->resume); ops->resume(); WARN_ONCE(!irqs_disabled(), "Interrupts enabled after %pS\n", ops->resume); diff --git a/drivers/base/topology.c b/drivers/base/topology.c index ad8d33c6077b..4d254fcc93d1 100644 --- a/drivers/base/topology.c +++ b/drivers/base/topology.c @@ -14,11 +14,11 @@ #include <linux/hardirq.h> #include <linux/topology.h> -#define define_id_show_func(name) \ -static ssize_t name##_show(struct device *dev, \ - struct device_attribute *attr, char *buf) \ -{ \ - return sprintf(buf, "%d\n", topology_##name(dev->id)); \ +#define define_id_show_func(name) \ +static ssize_t name##_show(struct device *dev, \ + struct device_attribute *attr, char *buf) \ +{ \ + return sysfs_emit(buf, "%d\n", topology_##name(dev->id)); \ } #define define_siblings_show_map(name, mask) \ |