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framebuffer: changes to mmap and how the ioctl information is stored and accessed

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Matheus
2022-10-24 15:30:16 -03:00
parent b14a285b9e
commit 88d7818c39
1 changed files with 126 additions and 116 deletions
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src/video/framebuffer.c
+126 -116
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@@ -4,6 +4,67 @@
#include <errno.h>
#include <arch/mmu.h>
#include <arch/cls.h>
#include <kernel/alloc.h>
#include <kernel/pmm.h>
struct fb_bitfield {
uint32_t offset;
uint32_t length;
uint32_t msb_right;
};
typedef struct{
uint32_t xres;
uint32_t yres;
uint32_t xres_virtual;
uint32_t yres_virtual;
uint32_t xoffset;
uint32_t yoffset;
uint32_t bits_per_pixel;
uint32_t grayscale;
struct fb_bitfield red;
struct fb_bitfield green;
struct fb_bitfield blue;
struct fb_bitfield transp;
uint32_t nonstd;
uint32_t activate;
uint32_t height;
uint32_t width;
uint32_t accel_flags;
uint32_t pixclock;
uint32_t left_margin;
uint32_t right_margin;
uint32_t upper_margin;
uint32_t lower_margin;
uint32_t hsync_len;
uint32_t vsync_len;
uint32_t sync;
uint32_t vmode;
uint32_t rotate;
uint32_t colorspace;
uint32_t reserved[4];
}fb_var_screeninfo;
typedef struct {
char id[16];
unsigned long smem_start;
uint32_t smem_len;
uint32_t type;
uint32_t type_aux;
uint32_t visual;
uint16_t xpanstep;
uint16_t ypanstep;
uint16_t ywrapstep;
uint32_t line_length;
unsigned long mmio_start;
uint32_t mmio_len;
uint32_t accel;
uint16_t capabilities;
uint16_t reserved[2];
} fb_fix_screeninfo;
#define FB_VISUAL_TRUECOLOR 2
#define FB_TYPE_PACKED_PIXELS 0
static volatile struct limine_framebuffer_request fbreq = {
.id = LIMINE_FRAMEBUFFER_REQUEST,
@@ -12,6 +73,8 @@ static volatile struct limine_framebuffer_request fbreq = {
static struct limine_framebuffer** fbs;
static size_t fbcount;
fb_var_screeninfo* fbvs;
fb_fix_screeninfo* fbfs;
static int devchecks(int fb, size_t* count, size_t offset){
@@ -75,66 +138,7 @@ static int isseekable(int minor, size_t* max){
#define FBIOGET_VSCREENINFO 0x4600
#define FBIOPUT_VSCREENINFO 0x4601
#define FBIOGET_FSCREENINFO 0x4602
struct fb_bitfield {
uint32_t offset;
uint32_t length;
uint32_t msb_right;
};
typedef struct{
uint32_t xres;
uint32_t yres;
uint32_t xres_virtual;
uint32_t yres_virtual;
uint32_t xoffset;
uint32_t yoffset;
uint32_t bits_per_pixel;
uint32_t grayscale;
struct fb_bitfield red;
struct fb_bitfield green;
struct fb_bitfield blue;
struct fb_bitfield transp;
uint32_t nonstd;
uint32_t activate;
uint32_t height;
uint32_t width;
uint32_t accel_flags;
uint32_t pixclock;
uint32_t left_margin;
uint32_t right_margin;
uint32_t upper_margin;
uint32_t lower_margin;
uint32_t hsync_len;
uint32_t vsync_len;
uint32_t sync;
uint32_t vmode;
uint32_t rotate;
uint32_t colorspace;
uint32_t reserved[4];
}fb_var_screeninfo;
typedef struct {
char id[16];
unsigned long smem_start;
uint32_t smem_len;
uint32_t type;
uint32_t type_aux;
uint32_t visual;
uint16_t xpanstep;
uint16_t ypanstep;
uint16_t ywrapstep;
uint32_t line_length;
unsigned long mmio_start;
uint32_t mmio_len;
uint32_t accel;
uint16_t capabilities;
uint16_t reserved[2];
} fb_fix_screeninfo;
#define FB_VISUAL_TRUECOLOR 2
#define FB_TYPE_PACKED_PIXELS 0
#define FBIOBLANK 0x4611
static int ioctl(int minor, unsigned long req, void* arg){
@@ -143,63 +147,24 @@ static int ioctl(int minor, unsigned long req, void* arg){
struct limine_framebuffer* fb = fbs[minor];
switch(req){
case FBIOPUT_VSCREENINFO: // TODO maybe this should be done properly
case FBIOBLANK:
break;
case FBIOPUT_VSCREENINFO:
{
fb_var_screeninfo* i = arg;
fbvs[minor] = *i;
}
break;
case FBIOGET_FSCREENINFO:
{
fb_fix_screeninfo* i = arg;
strcpy(i->id, "LIMINE FB");
i->smem_start = fb->address;
i->smem_len = fb->pitch*fb->height;
i->type = FB_TYPE_PACKED_PIXELS;
i->visual = FB_VISUAL_TRUECOLOR;
i->xpanstep = 0;
i->ypanstep = 0;
i->line_length = fb->pitch;
i->mmio_start = 0;
i->mmio_len = 0;
i->accel = 0;
i->capabilities = 0;
*i = fbfs[minor];
}
break;
case FBIOGET_VSCREENINFO:
{
fb_var_screeninfo* i = arg;
i->xres = fb->width;
i->yres = fb->height;
i->xres_virtual = fb->width;
i->yres_virtual = fb->height;
i->xoffset = 0;
i->yoffset = 0;
i->bits_per_pixel = fb->bpp;
i->grayscale = 0;
i->red.msb_right = 1;
i->green.msb_right = 1;
i->blue.msb_right = 1;
i->transp.msb_right = 1;
i->red.offset = fb->red_mask_shift;
i->red.length = fb->red_mask_size;
i->blue.offset = fb->blue_mask_shift;
i->blue.length = fb->blue_mask_size;
i->green.offset = fb->green_mask_shift;
i->green.length = fb->green_mask_size;
i->transp.offset = 28;
i->transp.length = 8;
i->nonstd = 0;
i->activate = 0;
i->height = 0;
i->width = 0;
i->accel_flags = 0;
i->pixclock = 0;
i->left_margin = 0;
i->upper_margin = 0;
i->lower_margin = 0;
i->right_margin = 0;
i->hsync_len = 0;
i->vsync_len = 0;
i->vmode = 0;
i->rotate = 0;
i->colorspace = 0;
*i = fbvs[minor];
}
break;
default:
@@ -216,17 +181,19 @@ static map(int minor, void* addr, size_t len, size_t offset, size_t mmuflags){
int err = devchecks(minor, &properlen, offset);
if(properlen % PAGE_SIZE)
properlen += PAGE_SIZE;
properlen /= PAGE_SIZE;
if(properlen % PAGE_SIZE)
++properlen;
if(err)
return err;
for(uintmax_t page = 0; page < len; ++page){
if(page < properlen)
arch_mmu_map(arch_getcls()->context->context, fbs[minor]->address + offset, addr, mmuflags);
for(uintmax_t page = 0; page < properlen; ++page){
if(page < properlen){
arch_mmu_map(arch_getcls()->context->context, (fbs[minor]->address - (size_t)limine_hhdm_offset)+ offset + PAGE_SIZE*page, addr + page*PAGE_SIZE, mmuflags);
}
}
@@ -246,14 +213,57 @@ void fb_init(){
fbcount = fbreq.response->framebuffer_count;
fbs = fbreq.response->framebuffers;
fbfs = alloc(sizeof(fb_fix_screeninfo) * fbcount);
fbvs = alloc(sizeof(fb_var_screeninfo) * fbcount);
if(fbfs == NULL || fbvs == NULL)
_panic("Out of memory", 0);
char name[] = { 'f', 'b', '0', 0};
for(uintmax_t fb = 0; fb < fbcount; ++fb){
for(uintmax_t ifb = 0; ifb < fbcount; ++ifb){
devman_newdevice(name, TYPE_CHARDEV, MAJOR_FB, fb, &calls);
devman_newdevice(name, TYPE_CHARDEV, MAJOR_FB, ifb, &calls);
++name[2]; // increase the fbX num
// initialise info
struct limine_framebuffer* fb = fbs[ifb];
// variable
{
fb_var_screeninfo* i = &fbvs[ifb];
i->xres = fb->width;
i->yres = fb->height;
i->xres_virtual = fb->width;
i->yres_virtual = fb->height;
i->bits_per_pixel = fb->bpp;
i->red.msb_right = 1;
i->green.msb_right = 1;
i->blue.msb_right = 1;
i->transp.msb_right = 1;
i->red.offset = fb->red_mask_shift;
i->red.length = fb->red_mask_size;
i->blue.offset = fb->blue_mask_shift;
i->blue.length = fb->blue_mask_size;
i->green.offset = fb->green_mask_shift;
i->green.length = fb->green_mask_size;
i->height = -1;
i->width = -1;
}
// fixed
{
fb_fix_screeninfo* i = &fbfs[ifb];
strcpy(i->id, "LIMINE FB");
i->smem_len = fb->pitch*fb->height;
i->type = FB_TYPE_PACKED_PIXELS;
i->visual = FB_VISUAL_TRUECOLOR;
i->line_length = fb->pitch;
i->mmio_len = fb->pitch*fb->height;
}
}
}