Keyboard lights, TLB shootdowns, battery in sysfs, /proc/pid/maps
Caps, Num and Scroll Lock now light their LEDs on PS/2 and USB keyboards, share one state between keyboards, and stop toggling on key repeat. X sets them through evdev writes while it holds the keyboard. Unmapping memory in a process with threads on other CPUs now flushes their TLBs with an IPI. Without it a freed page stayed reachable through stale translations, which corrupted Epiphany's heap on SMP. ACPI batteries and AC adapters appear under /sys/class/power_supply. /proc/<pid>/maps lists file mappings, and a process killed by a fault names the file and offset it died in. r8169 gets a 256-entry RX ring. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01S1giNvrHTrPMPw7V6x1kQ4
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Nexoniarz
parent
73dcea7496
commit
438e7af141
18 changed files with 945 additions and 9 deletions
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@ -384,3 +384,145 @@ acpi_pci_route(void)
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kinfo("acpi: %d more on a second I/O APIC, which is not driven; "
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"those devices need MSI\n", beyond);
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}
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// --- batteries and adapters --------------------------------------------------
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//
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// A laptop's battery is an ACPI device, PNP0C0A, with methods that answer in
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// packages: _BIX (or the older _BIF) for what it is -- capacities, units,
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// names -- and _BST for how it is now. The adapter is ACPI0003 and _PSR says
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// whether it is plugged in. Read on demand, from /sys/class/power_supply,
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// which is where fastfetch and every battery widget look.
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#define MAXPSU 4
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static uacpi_namespace_node *psu_node[MAXPSU];
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static int psu_isbat[MAXPSU];
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static int npsu;
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static uacpi_iteration_decision
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found_psu(void *user, uacpi_namespace_node *node, uacpi_u32 depth)
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{
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(void)depth;
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if (npsu < MAXPSU) {
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psu_node[npsu] = node;
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psu_isbat[npsu] = user != 0;
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npsu++;
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}
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return UACPI_ITERATION_DECISION_CONTINUE;
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}
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static int psu_found;
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static void
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psu_find(void)
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{
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if (psu_found || !ready)
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return;
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psu_found = 1;
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uacpi_find_devices("PNP0C0A", found_psu, (void *)1);
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uacpi_find_devices("ACPI0003", found_psu, 0);
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}
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int
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acpi_psu_count(void)
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{
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psu_find();
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return npsu;
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}
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static uint32
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pkg_int(uacpi_object_array *p, uacpi_size i)
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{
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uacpi_u64 v;
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if (i >= p->count || uacpi_object_get_integer(p->objects[i], &v) != UACPI_STATUS_OK)
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return ACPI_UNKNOWN;
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return (uint32)v;
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}
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static void
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pkg_str(uacpi_object_array *p, uacpi_size i, char *out, int cap)
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{
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uacpi_data_view d;
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out[0] = 0;
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if (i >= p->count ||
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uacpi_object_get_string_or_buffer(p->objects[i], &d) != UACPI_STATUS_OK)
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return;
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int n = 0;
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for (uacpi_size k = 0; k < d.length && n < cap - 1 && d.const_text[k]; k++)
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if (d.const_text[k] >= ' ' && d.const_text[k] < 127)
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out[n++] = d.const_text[k];
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// Firmware pads with spaces.
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while (n > 0 && out[n - 1] == ' ')
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n--;
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out[n] = 0;
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}
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int
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acpi_psu_get(int i, struct acpi_psu *b)
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{
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uacpi_object *o;
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uacpi_object_array p;
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uacpi_u32 sta = 0xF;
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psu_find();
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if (i < 0 || i >= npsu)
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return -1;
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memset(b, 0, sizeof(*b));
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b->battery = psu_isbat[i];
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if (!b->battery) {
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uacpi_u64 v = 0;
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uacpi_eval_simple_integer(psu_node[i], "_PSR", &v);
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b->online = v != 0;
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return 0;
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}
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// Bit 4 of _STA: a battery is in the bay. A missing _STA means present.
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uacpi_eval_sta(psu_node[i], &sta);
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b->present = (sta & 0x10) != 0;
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b->rate = b->remaining = b->voltage = ACPI_UNKNOWN;
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b->design = b->full = b->design_voltage = b->cycles = ACPI_UNKNOWN;
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if (!b->present)
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return 0;
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// _BIX: a revision first, then _BIF's fields shifted by one, with the
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// cycle count after the design voltage's neighbours.
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if (uacpi_eval_package(psu_node[i], "_BIX", 0, &o) == UACPI_STATUS_OK) {
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if (uacpi_object_get_package(o, &p) == UACPI_STATUS_OK) {
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b->unit = (int)pkg_int(&p, 1);
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b->design = pkg_int(&p, 2);
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b->full = pkg_int(&p, 3);
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b->technology = (int)pkg_int(&p, 4);
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b->design_voltage = pkg_int(&p, 5);
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b->cycles = pkg_int(&p, 8);
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pkg_str(&p, 16, b->model, sizeof(b->model));
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pkg_str(&p, 17, b->serial, sizeof(b->serial));
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pkg_str(&p, 18, b->kind, sizeof(b->kind));
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pkg_str(&p, 19, b->oem, sizeof(b->oem));
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}
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uacpi_object_unref(o);
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} else if (uacpi_eval_package(psu_node[i], "_BIF", 0, &o) == UACPI_STATUS_OK) {
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if (uacpi_object_get_package(o, &p) == UACPI_STATUS_OK) {
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b->unit = (int)pkg_int(&p, 0);
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b->design = pkg_int(&p, 1);
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b->full = pkg_int(&p, 2);
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b->technology = (int)pkg_int(&p, 3);
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b->design_voltage = pkg_int(&p, 4);
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pkg_str(&p, 9, b->model, sizeof(b->model));
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pkg_str(&p, 10, b->serial, sizeof(b->serial));
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pkg_str(&p, 11, b->kind, sizeof(b->kind));
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pkg_str(&p, 12, b->oem, sizeof(b->oem));
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}
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uacpi_object_unref(o);
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}
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if (uacpi_eval_package(psu_node[i], "_BST", 0, &o) == UACPI_STATUS_OK) {
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if (uacpi_object_get_package(o, &p) == UACPI_STATUS_OK) {
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b->state = pkg_int(&p, 0);
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b->rate = pkg_int(&p, 1);
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b->remaining = pkg_int(&p, 2);
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b->voltage = pkg_int(&p, 3);
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}
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uacpi_object_unref(o);
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}
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return 0;
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}
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