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// MIT License, Copyright (c) 2021 Marvin Borner
#include <assert.h>
#include <bus.h>
#include <def.h>
#include <drivers/cpu.h>
#include <drivers/interrupts.h>
#include <drivers/ps2.h>
#include <drivers/timer.h>
#include <drivers/vbe.h>
#include <drivers/vmware.h>
#include <io.h>
#include <list.h>
#include <logger.h>
#include <mem.h>
#include <mm.h>
#include <multiboot.h>
#include <proc.h>
#include <rand.h>
#include <str.h>
#include <syscall.h>
struct io_listener {
u32 group;
struct proc *proc;
};
PROTECTED static struct io_dev *io_mappings[IO_MAX] = { 0 };
PROTECTED static struct list *io_listeners[IO_MAX] = { 0 };
static u32 group_id = 0;
static u8 io_type_valid(enum io_type io)
{
return io > IO_MIN && io < IO_MAX;
}
static struct io_dev *io_get(enum io_type io)
{
if (!io_type_valid(io))
return NULL;
return io_mappings[io];
}
// TODO: Efficiency
static void io_remove_group(u32 group)
{
for (u32 io = IO_MIN; io < IO_MAX; io++) {
struct node *iterator = io_listeners[io]->head;
while (iterator) {
struct io_listener *listener = iterator->data;
struct node *next = iterator->next;
if (listener->group == group)
list_remove(io_listeners[io], iterator);
iterator = next;
}
}
if (group + 1 == group_id)
group_id--;
}
CLEAR void io_add(enum io_type io, struct io_dev *dev)
{
assert(io_type_valid(io) && !io_mappings[io]);
io_mappings[io] = dev;
}
res io_poll(u32 *devs)
{
if (!memory_readable(devs))
return -EFAULT;
u32 group = group_id++;
for (u32 *p = devs; p && memory_readable(p); p++) {
stac();
enum io_type io = *p;
clac();
if (!io)
break;
struct io_dev *dev = io_get(io);
if (!dev || !dev->read) {
io_remove_group(group);
return -ENOENT;
}
if (dev->ready) {
res ready = dev->ready();
if (ready == EOK) {
io_remove_group(group);
return io;
} else if (ready != -EAGAIN) {
return ready;
}
}
struct io_listener *listener = zalloc(sizeof(*listener));
listener->group = group;
listener->proc = proc_current();
list_add(io_listeners[io], listener);
}
proc_state(proc_current(), PROC_BLOCKED);
proc_yield();
return io_poll(devs);
}
res io_control(enum io_type io, u32 request, void *arg1, void *arg2, void *arg3)
{
struct io_dev *dev;
if (!(dev = io_get(io)) || !dev->control)
return -ENOENT;
return dev->control(request, arg1, arg2, arg3);
}
res io_write(enum io_type io, const void *buf, u32 offset, u32 count)
{
if (!memory_readable_range(memory_range(buf, count)))
return -EFAULT;
struct io_dev *dev;
if (!(dev = io_get(io)) || !dev->write)
return -ENOENT;
return dev->write(buf, offset, count);
}
res io_read(enum io_type io, void *buf, u32 offset, u32 count)
{
if (!memory_writable_range(memory_range(buf, count)))
return -EFAULT;
struct io_dev *dev;
if (!(dev = io_get(io)) || !dev->read)
return -ENOENT;
if (dev->ready && dev->ready() != EOK)
return -EAGAIN;
return dev->read(buf, offset, count);
}
res io_ready(enum io_type io)
{
struct io_dev *dev;
if (!(dev = io_get(io)))
return -ENOENT;
if (dev->ready && dev->ready() != EOK)
return -EAGAIN;
return EOK;
}
void io_block(enum io_type io, struct proc *proc)
{
assert(io_type_valid(io));
struct io_listener *listener = zalloc(sizeof(*listener));
listener->group = group_id++;
listener->proc = proc;
list_add(io_listeners[io], listener);
proc_state(proc_current(), PROC_BLOCKED);
proc_yield();
}
void io_unblock(enum io_type io)
{
assert(io_type_valid(io));
struct node *iterator = io_listeners[io]->head;
while (iterator) {
struct io_listener *listener = iterator->data;
struct proc *proc = listener->proc;
proc_state(proc, PROC_RUNNING);
struct node *next = iterator->next;
io_remove_group(listener->group);
free(listener);
iterator = next;
}
if (proc_idle())
proc_yield();
}
void io_unblock_pid(u32 pid)
{
for (u32 io = IO_MIN; io < IO_MAX; io++) {
struct node *iterator = io_listeners[io]->head;
while (iterator) {
struct io_listener *listener = iterator->data;
struct proc *proc = listener->proc;
proc_state(proc, PROC_RUNNING);
struct node *next = iterator->next;
if (proc->pid == pid) {
list_remove(io_listeners[io], iterator);
free(listener);
}
iterator = next;
}
}
if (proc_idle())
proc_yield();
}
CLEAR void io_install(void)
{
for (u32 i = 0; i < IO_MAX; i++)
io_listeners[i] = list_new();
/**
* Keyboard & mouse detection
*/
ps2_detect();
u8 ps2_keyboard = ps2_keyboard_detect();
if (ps2_keyboard != U8_MAX) {
ps2_keyboard_install(ps2_keyboard);
}
u8 ps2_mouse = ps2_mouse_detect();
if (ps2_mouse != U8_MAX) {
if (vmware_detect() && vmware_mouse_detect())
vmware_mouse_install(ps2_mouse);
else
ps2_mouse_install(ps2_mouse);
}
/**
* Framebuffer detection
*/
u32 vbe = multiboot_vbe();
if (vbe)
vbe_install(vbe);
/**
* Other devices
*/
timer_install();
logger_install();
bus_install();
}
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