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/* Definitions for front buffer */
#include <stdio.h>
#include <stdint.h>
#include <inttypes.h>
#include <nouveau_drm.h>
#include <nouveau_drmif.h>
#include <nouveau_bo.h>
#include "screen.h"
#include "object.h"
/* Global variables */
int screen_width;
int screen_height;
int screen_bpp;
int screen_offset;
int screen_pitch;
int viewport_x=32, viewport_y=32;
int viewport_w=512, viewport_h=512;
int drm_fd = -1;
struct nouveau_device *dev = NULL;
/* Functions */
int screen_open(int width, int height, int bpp)
{
int ret;
drm_fd = drmOpen("nouveau", 0);
if (drm_fd < 0) {
drmError(drm_fd, __func__);
fprintf(stderr, "failed to open drm\n");
return 1;
}
ret = nouveau_device_open_existing(&dev, 0, drm_fd, 0);
if (ret) {
screen_close();
return 1;
}
printf("screen: chipset: 0x%08x\n", dev->chipset);
printf("screen: vm_vram_base: 0x%" PRIu64 "\n", dev->vm_vram_base);
printf("screen: vm_vram_size: %d MB\n", (int) (dev->vm_vram_size >> 20));
printf("screen: vm_gart_size: %d MB\n", (int) (dev->vm_gart_size >> 20));
screen_width = width;
screen_height = height;
screen_bpp = bpp;
/* NOTE: find vt console fb in dmesg log:
[ 9.435846] [drm] nouveau 0000:01:00.0: allocated 1680x1050 fb: 0x49000, bo ffff88007c0e8600
*/
screen_offset = 0x49000;
screen_pitch = screen_width*(screen_bpp/8);
if ((screen_pitch & 255)!=0) {
screen_pitch = (screen_pitch | 255)+1; /* Align on 256 bytes boundary */
}
printf("screen: %dx%dx%d, pitch=%d, offset=0x%08x\n",
screen_width, screen_height, screen_bpp,
screen_pitch, screen_offset
);
/* TODO: if running with X, try to find front buffer offset and resolution */
return 0;
}
void screen_close(void)
{
if (dev) {
nouveau_device_close(&dev);
dev = NULL;
}
if (drm_fd>=0) {
drmClose(drm_fd);
drm_fd = -1;
}
}
struct nouveau_bo *screen_allocmem(int size)
{
struct nouveau_bo *bo = NULL;
uint32_t flags = NOUVEAU_BO_MAP;
int ret;
ret = nouveau_bo_new(dev, flags, 0x100, size, &bo);
if (ret)
return NULL;
ret = nouveau_bo_map(bo, NOUVEAU_BO_WR);
if (ret) {
printf("screen: map failed: %d\n", ret);
nouveau_bo_ref(NULL, &bo);
return NULL;
}
return bo;
}
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