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This commit is contained in:
JerryXiao 2023-04-26 15:16:47 +08:00
parent a5fbfa7a59
commit 87c91c0c5a
Signed by: Jerry
GPG key ID: 22618F758B5BE2E5
1 changed files with 131 additions and 92 deletions
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191
server.c
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@ -9,6 +9,7 @@
#include <libdrm/amdgpu_drm.h> #include <libdrm/amdgpu_drm.h>
#include <xf86drmMode.h> #include <xf86drmMode.h>
#include <linux/uinput.h> #include <linux/uinput.h>
#include <linux/dma-buf.h>
#include <xkbcommon/xkbcommon.h> #include <xkbcommon/xkbcommon.h>
#include <math.h> #include <math.h>
@ -55,28 +56,91 @@ static void convert_bgrx_to_rgb(const char* in, int width, int height, char* buf
} }
} }
#define XSTRIPE 16 char *kms_convert_buf = NULL;
#define YSTRIPE 128 size_t kms_convert_buf_len = 0;
char *nv_stripe_buf = NULL; static inline void convert_kmsbuf(const int XSTRIPE, const int YSTRIPE, const char* in, int width, int height, char* buff) {
static void convert_nv_stripe(const char* in, int width, int height, char* buff) {
if (width % XSTRIPE) { if (width % XSTRIPE) {
return; return;
} }
if (!nv_stripe_buf) nv_stripe_buf = malloc(width * height * 4); if (kms_convert_buf_len < width * height * 4) {
convert_bgrx_to_rgb(in, width, height, nv_stripe_buf); if (kms_convert_buf) free(kms_convert_buf);
for (int i = 0; i < height*width; i++) kms_convert_buf = malloc(width * height * 4);
kms_convert_buf_len = width * height * 4;
}
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++)
{ {
int sno = i / (XSTRIPE * YSTRIPE); int sno = (x / XSTRIPE) + (y / YSTRIPE) * (width / XSTRIPE);
int ord = i % (XSTRIPE * YSTRIPE); int ord = (x % XSTRIPE) + (y % YSTRIPE) * XSTRIPE;
int base_x = sno % (width / XSTRIPE) * XSTRIPE; int offset = sno * XSTRIPE * YSTRIPE + ord;
int base_y = sno / (width / XSTRIPE) * YSTRIPE;
int sx = ord % XSTRIPE + base_x;
int sy = ord / XSTRIPE + base_y;
int offset = sy * width + sx;
if (offset < height*width) { if (offset < height*width) {
memcpy(buff + offset*4, nv_stripe_buf + i*4, 4); memcpy(kms_convert_buf + (x+y*width)*4, in + offset*4, 4);
} }
} }
}
convert_bgrx_to_rgb(kms_convert_buf, width, height, buff);
}
static size_t get_extra_mmap_bytes(const int XSTRIPE, const int YSTRIPE, int width, int height) {
if (height % YSTRIPE) {
int offset_max = 0;
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++)
{
int sno = (x / XSTRIPE) + (y / YSTRIPE) * (width / XSTRIPE);
int ord = (x % XSTRIPE) + (y % YSTRIPE) * XSTRIPE;
int offset = sno * XSTRIPE * YSTRIPE + ord;
if (offset > offset_max) {
offset_max = offset;
}
}
}
return offset_max * 4 - height*width * 4;
}
else {
return 0;
}
}
#define XSTRIPE_INTEL 128
#define YSTRIPE_INTEL 8
#define XSTRIPE_NVIDIA 16
#define YSTRIPE_NVIDIA 128
#define XSTRIPE_INTEL 16
#define YSTRIPE_INTEL 128
static size_t get_nvidia_extra_mmap_bytes(int width, int height) {
return get_extra_mmap_bytes(XSTRIPE_NVIDIA, YSTRIPE_NVIDIA, width, height);
}
static size_t get_intel_extra_mmap_bytes(int width, int height) {
return get_extra_mmap_bytes(XSTRIPE_NVIDIA, YSTRIPE_NVIDIA, width, height);
}
static void convert_nvidia_kmsbuf(const char* in, int width, int height, char* buff) {
convert_kmsbuf(XSTRIPE_INTEL, YSTRIPE_INTEL, in, width, height, buff);
}
static void convert_intel_kmsbuf(const char* in, int width, int height, char* buff) {
convert_kmsbuf(XSTRIPE_INTEL, YSTRIPE_INTEL, in, width, height, buff);
}
struct vnc_drm_attr {
void (*sync_start)(int);
void (*sync_end)(int);
void (*convert)(const char*, int, int, char*);
};
static inline void drm_sync(int drmfd, uint64_t flags) {
int ioctl_err;
struct dma_buf_sync sync = {
.flags = flags,
};
if (ioctl_err = ioctl(drmfd, DMA_BUF_IOCTL_SYNC, &sync))
fprintf(stderr, "DRM ioctl error %d on line %d\n", ioctl_err, __LINE__);
}
static void drm_sync_start(int drmfd) {
drm_sync(drmfd, DMA_BUF_SYNC_START | DMA_BUF_SYNC_READ);
}
static void drm_sync_end(int drmfd) {
drm_sync(drmfd, DMA_BUF_SYNC_END | DMA_BUF_SYNC_READ);
}
static void drm_sync_noop(int drmfd) {
} }
struct vnc_xkb { struct vnc_xkb {
@ -282,18 +346,6 @@ static void rfb_ptr_hook(int mask, int screen_x, int screen_y, rfbClientPtr cl)
} }
static void drm_wait_vblank_noop(int x) {
}
static void drm_wait_vblank(int drmfd) {
int ioctl_err;
union drm_wait_vblank vbl;
memset(&vbl, 0, sizeof(vbl));
vbl.request.type = DRM_VBLANK_RELATIVE;
vbl.request.sequence = 1;
if (ioctl_err = drmIoctl(drmfd, DRM_IOCTL_WAIT_VBLANK, &vbl))
fprintf(stderr, "DRM ioctl error %d on line %d\n", ioctl_err, __LINE__);
}
int main(int argc, const char **argv) int main(int argc, const char **argv)
{ {
if (argc < 2) { if (argc < 2) {
@ -305,6 +357,7 @@ int main(int argc, const char **argv)
const char *card = argv[1]; const char *card = argv[1];
const int drmfd = open(card, O_RDONLY); const int drmfd = open(card, O_RDONLY);
int primefd = -1;
if (drmfd < 0) { if (drmfd < 0) {
fprintf(stderr, "card %s open failed: %s\n", card, strerror(errno)); fprintf(stderr, "card %s open failed: %s\n", card, strerror(errno));
return 1; return 1;
@ -383,6 +436,29 @@ int main(int argc, const char **argv)
} }
int ioctl_err = 0; int ioctl_err = 0;
printf("drm driver is %s\n", drm_ver->name);
char *mapped = NULL;
struct vnc_drm_attr funcs = {
.sync_start = &drm_sync_start,
.sync_end = &drm_sync_end,
.convert = &convert_bgrx_to_rgb,
};
err = drmPrimeHandleToFD(drmfd, fb->handle, O_RDWR, &primefd);
if (err < 0 || primefd < 0) {
perror("Failed to get PRIME fd from framebuffer handle");
goto cleanup;
}
int mmap_fd = primefd;
size_t mmap_size = fb->width * fb->height * 32 / 8;
off_t mmap_offset = 0;
if (strcmp(drm_ver->name, "i915") == 0) {
funcs.convert = &convert_intel_kmsbuf;
mmap_size += get_intel_extra_mmap_bytes(fb->width, fb->height);
}
else if (strcmp(drm_ver->name, "amdgpu") == 0) {
struct drm_gem_flink flink; struct drm_gem_flink flink;
flink.handle = fb->handle; flink.handle = fb->handle;
if (ioctl_err = drmIoctl(drmfd, DRM_IOCTL_GEM_FLINK, &flink)) { if (ioctl_err = drmIoctl(drmfd, DRM_IOCTL_GEM_FLINK, &flink)) {
@ -391,27 +467,11 @@ int main(int argc, const char **argv)
} }
struct drm_gem_open open_arg; struct drm_gem_open open_arg;
open_arg.name = flink.name; open_arg.name = flink.name;
printf("global name = %d\n", flink.name);
if (ioctl_err = drmIoctl(drmfd, DRM_IOCTL_GEM_OPEN, &open_arg)) { if (ioctl_err = drmIoctl(drmfd, DRM_IOCTL_GEM_OPEN, &open_arg)) {
fprintf(stderr, "DRM ioctl error %d on line %d\n", ioctl_err, __LINE__); fprintf(stderr, "DRM ioctl error %d on line %d\n", ioctl_err, __LINE__);
goto cleanup; goto cleanup;
} }
off_t mmap_offset = 0;
size_t mmap_size = 0;
printf("drm driver is %s\n", drm_ver->name);
char *mapped = NULL;
void (*convert_func)(const char*, int, int, char*) = &convert_bgrx_to_rgb;
void (*vblank_func)(int) = &drm_wait_vblank;
if (strcmp(drm_ver->name, "i915") == 0) {
struct drm_i915_gem_mmap_gtt mmap_arg;
mmap_arg.handle = open_arg.handle;
if (ioctl_err = drmIoctl(drmfd, DRM_IOCTL_I915_GEM_MMAP_GTT, &mmap_arg)) {
fprintf(stderr, "DRM ioctl error %d on line %d\n", ioctl_err, __LINE__);
goto cleanup;
}
mmap_size = open_arg.size;
mmap_offset = mmap_arg.offset;
}
else if (strcmp(drm_ver->name, "amdgpu") == 0) {
union drm_amdgpu_gem_mmap mmap_arg; union drm_amdgpu_gem_mmap mmap_arg;
memset(&mmap_arg, 0, sizeof(mmap_arg)); memset(&mmap_arg, 0, sizeof(mmap_arg));
mmap_arg.in.handle = open_arg.handle; mmap_arg.in.handle = open_arg.handle;
@ -422,33 +482,23 @@ int main(int argc, const char **argv)
mmap_size = open_arg.size; mmap_size = open_arg.size;
mmap_offset = mmap_arg.out.addr_ptr; mmap_offset = mmap_arg.out.addr_ptr;
} }
else { else if (strcmp(drm_ver->name, "nvidia-drm") == 0) {
if (strcmp(drm_ver->name, "nvidia-drm") == 0) {
// quirky and slow // quirky and slow
convert_func = &convert_nv_stripe; funcs.convert = &convert_nvidia_kmsbuf;
vblank_func = &drm_wait_vblank_noop; mmap_size += get_nvidia_extra_mmap_bytes(fb->width, fb->height);
} }
else if (strcmp(drm_ver->name, "vmwgfx") == 0 || strcmp(drm_ver->name, "vboxvideo") == 0 || strcmp(drm_ver->name, "virtio_gpu") == 0) { else if (strcmp(drm_ver->name, "vmwgfx") == 0 || strcmp(drm_ver->name, "vboxvideo") == 0 || strcmp(drm_ver->name, "virtio_gpu") == 0) {
// virgl does not work // virgl does not work
vblank_func = &drm_wait_vblank_noop; //funcs.sync_start = &drm_sync_noop;
//funcs.sync_end = &drm_sync_noop;
} }
else { else {
fprintf(stderr, "Untested drm driver, use at your own risk!\n"); fprintf(stderr, "Untested drm driver, use at your own risk!\n");
} }
struct drm_mode_map_dumb mreq;
memset(&mreq, 0, sizeof(mreq));
mreq.handle = open_arg.handle;
if (ioctl_err = drmIoctl(drmfd, DRM_IOCTL_MODE_MAP_DUMB, &mreq)) {
fprintf(stderr, "DRM ioctl error %d on line %d\n", ioctl_err, __LINE__);
goto cleanup;
}
mmap_size = open_arg.size;
mmap_offset = mreq.offset;
}
if (!mapped) { if (!mapped) {
printf("mapping with size = %d, offset = %d, drmfd = %d\n", mmap_size, mmap_offset, drmfd); printf("mapping with size = %d, offset = %d, fd = %d\n", mmap_size, mmap_offset, mmap_fd);
mapped = mmap(NULL, mmap_size, PROT_READ, MAP_SHARED, drmfd, mmap_offset); mapped = mmap(NULL, mmap_size, PROT_READ, MAP_SHARED, mmap_fd, mmap_offset);
if (mapped == MAP_FAILED) { if (mapped == MAP_FAILED) {
perror("mmap"); perror("mmap");
goto cleanup; goto cleanup;
@ -458,8 +508,6 @@ int main(int argc, const char **argv)
size_t buflen = fb->width * fb->height * 32 / 8; size_t buflen = fb->width * fb->height * 32 / 8;
char *buf = malloc(buflen); char *buf = malloc(buflen);
memset(buf, 0, buflen); memset(buf, 0, buflen);
char *buf2 = malloc(buflen);
memset(buf2, 0, buflen);
resolution.x = fb->width; resolution.x = fb->width;
resolution.y = fb->height; resolution.y = fb->height;
@ -479,23 +527,13 @@ int main(int argc, const char **argv)
rfbRunEventLoop(server,-1,TRUE); rfbRunEventLoop(server,-1,TRUE);
while (rfbIsActive(server)) { while (rfbIsActive(server)) {
if (server->clientHead && TimeToTakePicture()) { if (server->clientHead && TimeToTakePicture()) {
vblank_func(drmfd); funcs.sync_start(primefd);
// still tearing funcs.convert(mapped, fb->width, fb->height, buf);
memcpy(buf2, mapped, buflen); funcs.sync_end(primefd);
convert_func(buf2, fb->width, fb->height, buf);
rfbMarkRectAsModified(server, 0, 0, fb->width, fb->height); rfbMarkRectAsModified(server, 0, 0, fb->width, fb->height);
} }
} }
if (drm_ver != NULL) drmFreeVersion(drm_ver);
if (fb != NULL) drmModeFreeFB(fb);
if (uinput_fd > 0) {
ioctl(uinput_fd, UI_DEV_DESTROY);
close(uinput_fd);
}
close(drmfd);
return 0;
cleanup: cleanup:
if (drm_ver != NULL) drmFreeVersion(drm_ver); if (drm_ver != NULL) drmFreeVersion(drm_ver);
if (fb != NULL) drmModeFreeFB(fb); if (fb != NULL) drmModeFreeFB(fb);
@ -503,6 +541,7 @@ int main(int argc, const char **argv)
ioctl(uinput_fd, UI_DEV_DESTROY); ioctl(uinput_fd, UI_DEV_DESTROY);
close(uinput_fd); close(uinput_fd);
} }
if (primefd > 0) close(primefd);
close(drmfd); close(drmfd);
return 1; return 1;
} }