From bbf700a0c6b2f8ca9a73c2a334973286d5b8afcc Mon Sep 17 00:00:00 2001 From: Marvin Borner Date: Fri, 12 Mar 2021 19:11:26 +0100 Subject: Started basic ioctl fb interface --- kernel/Makefile | 1 + kernel/drivers/fb.c | 45 +++++++++++++++++++++++++++++++++++++++++++++ kernel/features/fs.c | 46 +++++++++++++++++++++++++++++++++++++++++----- kernel/features/proc.c | 9 --------- kernel/features/syscall.c | 5 +++++ kernel/inc/boot.h | 1 - kernel/inc/fb.h | 10 ++++++++++ kernel/inc/fs.h | 4 ++++ kernel/main.c | 8 ++------ 9 files changed, 108 insertions(+), 21 deletions(-) create mode 100644 kernel/drivers/fb.c create mode 100644 kernel/inc/fb.h (limited to 'kernel') diff --git a/kernel/Makefile b/kernel/Makefile index 2db201b..e9ade73 100644 --- a/kernel/Makefile +++ b/kernel/Makefile @@ -8,6 +8,7 @@ COBJS = main.o \ drivers/mouse.o \ drivers/pci.o \ drivers/ide.o \ + drivers/fb.o \ drivers/timer.o \ drivers/rtl8139.o \ features/mm.o \ diff --git a/kernel/drivers/fb.c b/kernel/drivers/fb.c new file mode 100644 index 0000000..a1a7729 --- /dev/null +++ b/kernel/drivers/fb.c @@ -0,0 +1,45 @@ +// MIT License, Copyright (c) 2021 Marvin Borner + +#include +#include +#include +#include +#include +#include +#include + +static u32 dev_id = 0; +static struct vid_info *info = NULL; + +static s32 fb_ioctl(u32 request, void *arg1, void *arg2, void *arg3, struct device *dev) +{ + UNUSED(arg2); + UNUSED(arg3); + UNUSED(dev); + + switch (request) { + case IO_FB_GET: + memcpy(arg1, info->vbe, 256); + return 0; + default: + return -1; + } +} + +static u8 fb_ready(void) +{ + return 1; +} + +void fb_install(struct vid_info *boot) +{ + info = boot; + + struct device *dev = zalloc(sizeof(*dev)); + dev->name = strdup("fb"); + dev->type = DEV_CHAR; + dev->ioctl = fb_ioctl; + dev->ready = fb_ready; + device_add(dev); + dev_id = dev->id; +} diff --git a/kernel/features/fs.c b/kernel/features/fs.c index 687d7ad..4d19dde 100644 --- a/kernel/features/fs.c +++ b/kernel/features/fs.c @@ -131,7 +131,8 @@ s32 vfs_read(const char *path, void *buf, u32 offset, u32 count) path++; struct mount_info *m = vfs_find_mount_info(path); - assert(m && m->dev && m->dev->vfs && m->dev->vfs->read && m->dev->vfs->perm); + if (!(m && m->dev && m->dev->vfs && m->dev->vfs->read && m->dev->vfs->perm)) + return -1; u32 len = strlen(m->path); if (len > 1) @@ -156,7 +157,8 @@ s32 vfs_write(const char *path, void *buf, u32 offset, u32 count) path++; struct mount_info *m = vfs_find_mount_info(path); - assert(m && m->dev && m->dev->vfs && m->dev->vfs->write && m->dev->vfs->perm); + if (!(m && m->dev && m->dev->vfs && m->dev->vfs->write && m->dev->vfs->perm)) + return -1; u32 len = strlen(m->path); if (len > 1) @@ -168,6 +170,25 @@ s32 vfs_write(const char *path, void *buf, u32 offset, u32 count) return m->dev->vfs->write(path, buf, offset, count, m->dev); } +s32 vfs_ioctl(const char *path, u32 request, void *arg1, void *arg2, void *arg3) +{ + while (*path == ' ') + path++; + + struct mount_info *m = vfs_find_mount_info(path); + if (!(m && m->dev && m->dev->vfs && m->dev->vfs->ioctl && m->dev->vfs->perm)) + return -1; + + u32 len = strlen(m->path); + if (len > 1) + path += len; + + if (!m->dev->vfs->perm(path, VFS_WRITE, m->dev) && !proc_super()) + return -1; + + return m->dev->vfs->ioctl(path, request, arg1, arg2, arg3, m->dev); +} + s32 vfs_stat(const char *path, struct stat *buf) { while (*path == ' ') @@ -177,12 +198,16 @@ s32 vfs_stat(const char *path, struct stat *buf) return -1; struct mount_info *m = vfs_find_mount_info(path); - assert(m && m->dev && m->dev->vfs && m->dev->vfs->stat); + if (!(m && m->dev && m->dev->vfs && m->dev->vfs->stat && m->dev->vfs->perm)) + return -1; u32 len = strlen(m->path); if (len > 1) path += len; + if (!m->dev->vfs->perm(path, VFS_WRITE, m->dev) && !proc_super()) + return -1; + return m->dev->vfs->stat(path, buf, m->dev); } @@ -192,7 +217,8 @@ s32 vfs_wait(const char *path, u32 func_ptr) path++; struct mount_info *m = vfs_find_mount_info(path); - assert(m && m->dev && m->dev->vfs); + if (!(m && m->dev && m->dev->vfs)) + return -1; // Default wait if (!m->dev->vfs->wait) { @@ -280,10 +306,19 @@ static s32 devfs_read(const char *path, void *buf, u32 offset, u32 count, struct { struct device *target = device_get_by_name(path + 1); if (!target || !target->read) - return 0; + return -1; return target->read(buf, offset, count, dev); } +static s32 devfs_ioctl(const char *path, u32 request, void *arg1, void *arg2, void *arg3, + struct device *dev) +{ + struct device *target = device_get_by_name(path + 1); + if (!target || !target->ioctl) + return -1; + return target->ioctl(request, arg1, arg2, arg3, dev); +} + static u8 devfs_perm(const char *path, enum vfs_perm perm, struct device *dev) { (void)path; @@ -309,6 +344,7 @@ void device_install(void) struct vfs *vfs = zalloc(sizeof(*vfs)); vfs->type = VFS_DEVFS; vfs->read = devfs_read; + vfs->ioctl = devfs_ioctl; vfs->perm = devfs_perm; vfs->ready = devfs_ready; struct device *dev = zalloc(sizeof(*dev)); diff --git a/kernel/features/proc.c b/kernel/features/proc.c index db2291c..38d88f8 100644 --- a/kernel/features/proc.c +++ b/kernel/features/proc.c @@ -479,15 +479,6 @@ void proc_init(void) _eip = ((struct proc *)new->data)->regs.eip; _esp = ((struct proc *)new->data)->regs.useresp; - /* u32 argc = 2; */ - /* char **argv = malloc(sizeof(*argv) * (argc + 1)); */ - /* argv[0] = strdup("init"); */ - /* argv[1] = (char *)boot_passed->vbe; */ - /* argv[2] = NULL; */ - - /* ((u32 *)_esp)[0] = argc; // First argument (argc) */ - /* ((u32 *)_esp)[-1] = (u32)argv; // Second argument (argv) */ - printf("Jumping to userspace!\n"); memory_switch_dir(((struct proc *)new->data)->page_dir); proc_jump_userspace(); diff --git a/kernel/features/syscall.c b/kernel/features/syscall.c index b3e69e0..bac1738 100644 --- a/kernel/features/syscall.c +++ b/kernel/features/syscall.c @@ -52,6 +52,11 @@ static void syscall_handler(struct regs *r) r->eax = (u32)vfs_write((char *)r->ebx, (void *)r->ecx, r->edx, r->esi); break; } + case SYS_IOCTL: { + r->eax = (u32)vfs_ioctl((char *)r->ebx, r->ecx, (void *)r->edx, (void *)r->esi, + (void *)r->edi); + break; + } case SYS_POLL: { s32 ret = vfs_poll((const char **)r->ebx); if (ret == PROC_MAX_WAIT_IDS + 1) diff --git a/kernel/inc/boot.h b/kernel/inc/boot.h index 052a56f..7f085cd 100644 --- a/kernel/inc/boot.h +++ b/kernel/inc/boot.h @@ -6,7 +6,6 @@ #include -extern struct vid_info *boot_passed; struct vid_info { u32 mode; u32 *vbe; diff --git a/kernel/inc/fb.h b/kernel/inc/fb.h new file mode 100644 index 0000000..3e7b08f --- /dev/null +++ b/kernel/inc/fb.h @@ -0,0 +1,10 @@ +// MIT License, Copyright (c) 2021 Marvin Borner + +#ifndef FB +#define FB + +#include + +void fb_install(struct vid_info *boot); + +#endif diff --git a/kernel/inc/fs.h b/kernel/inc/fs.h index 33b1afb..cd97b99 100644 --- a/kernel/inc/fs.h +++ b/kernel/inc/fs.h @@ -20,6 +20,7 @@ struct device { void *data; s32 (*read)(void *buf, u32 offset, u32 count, struct device *dev); s32 (*write)(void *buf, u32 offset, u32 count, struct device *dev); + s32 (*ioctl)(u32 request, void *arg1, void *arg2, void *arg3, struct device *dev); u8 (*ready)(void); }; @@ -40,6 +41,8 @@ struct vfs { void *data; s32 (*read)(const char *path, void *buf, u32 offset, u32 count, struct device *dev); s32 (*write)(const char *path, void *buf, u32 offset, u32 count, struct device *dev); + s32 (*ioctl)(const char *path, u32 request, void *arg1, void *arg2, void *arg3, + struct device *dev); s32 (*stat)(const char *path, struct stat *buf, struct device *dev); s32 (*wait)(const char *path, u32 func_ptr, struct device *dev); u8 (*perm)(const char *path, enum vfs_perm perm, struct device *dev); @@ -60,6 +63,7 @@ struct device *vfs_find_dev(const char *path); s32 vfs_read(const char *path, void *buf, u32 offset, u32 count); s32 vfs_write(const char *path, void *buf, u32 offset, u32 count); +s32 vfs_ioctl(const char *path, u32 request, void *arg1, void *arg2, void *arg3); s32 vfs_stat(const char *path, struct stat *buf); s32 vfs_wait(const char *path, u32 func_ptr); s32 vfs_poll(const char **files); diff --git a/kernel/main.c b/kernel/main.c index 8247672..118fe11 100644 --- a/kernel/main.c +++ b/kernel/main.c @@ -2,6 +2,7 @@ #include #include +#include #include #include #include @@ -17,10 +18,6 @@ #include #include -#include - -struct vid_info *boot_passed; - void kernel_main(struct mem_info *mem_info, struct vid_info *vid_info); // Decl void kernel_main(struct mem_info *mem_info, struct vid_info *vid_info) { @@ -35,8 +32,6 @@ void kernel_main(struct mem_info *mem_info, struct vid_info *vid_info) memory_install(mem_info); - boot_passed = vid_info; - cpu_enable_features(); cpu_print(); srand(rdseed()); @@ -50,6 +45,7 @@ void kernel_main(struct mem_info *mem_info, struct vid_info *vid_info) timer_install(); keyboard_install(); mouse_install(); + fb_install(vid_info); /* net_install(); */ // Enable drivers -- cgit v1.2.3