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Diffstat (limited to 'kms')
-rw-r--r--kms/client/kms_client.c23
-rw-r--r--kms/client/kms_client.h1
-rw-r--r--kms/kms_shared.h8
-rw-r--r--kms/server/kms_server.c235
4 files changed, 150 insertions, 117 deletions
diff --git a/kms/client/kms_client.c b/kms/client/kms_client.c
index f0c6d3c..957e184 100644
--- a/kms/client/kms_client.c
+++ b/kms/client/kms_client.c
@@ -88,7 +88,6 @@ static int recv_msg_from_server(int server_fd, gsr_kms_response *response) {
int gsr_kms_client_init(gsr_kms_client *self, const char *card_path) {
self->kms_server_pid = -1;
- self->card_path = NULL;
self->socket_fd = -1;
self->client_fd = -1;
self->socket_path[0] = '\0';
@@ -144,12 +143,6 @@ int gsr_kms_client_init(gsr_kms_client *self, const char *card_path) {
}
}
- self->card_path = strdup(card_path);
- if(!self->card_path) {
- fprintf(stderr, "gsr error: gsr_kms_client_init: failed to duplicate card_path\n");
- goto err;
- }
-
self->socket_fd = socket(AF_UNIX, SOCK_STREAM, 0);
if(self->socket_fd == -1) {
fprintf(stderr, "gsr error: gsr_kms_client_init: socket failed, error: %s\n", strerror(errno));
@@ -174,13 +167,13 @@ int gsr_kms_client_init(gsr_kms_client *self, const char *card_path) {
goto err;
} else if(pid == 0) { /* child */
if(inside_flatpak) {
- const char *args[] = { "flatpak-spawn", "--host", "pkexec", "flatpak", "run", "--command=gsr-kms-server", "com.dec05eba.gpu_screen_recorder", self->socket_path, NULL };
+ const char *args[] = { "flatpak-spawn", "--host", "pkexec", "flatpak", "run", "--command=gsr-kms-server", "com.dec05eba.gpu_screen_recorder", self->socket_path, card_path, NULL };
execvp(args[0], (char *const*)args);
} else if(has_perm) {
- const char *args[] = { server_filepath, self->socket_path, NULL };
+ const char *args[] = { server_filepath, self->socket_path, card_path, NULL };
execvp(args[0], (char *const*)args);
} else {
- const char *args[] = { "pkexec", server_filepath, self->socket_path, NULL };
+ const char *args[] = { "pkexec", server_filepath, self->socket_path, card_path, NULL };
execvp(args[0], (char *const*)args);
}
fprintf(stderr, "gsr error: gsr_kms_client_init: execvp failed, error: %s\n", strerror(errno));
@@ -189,7 +182,7 @@ int gsr_kms_client_init(gsr_kms_client *self, const char *card_path) {
self->kms_server_pid = pid;
}
- fprintf(stderr, "gsr info: gsr_kms_client_init: waiting for client to connect\n");
+ fprintf(stderr, "gsr info: gsr_kms_client_init: waiting for server to connect\n");
for(;;) {
struct timeval tv;
fd_set rfds;
@@ -217,7 +210,7 @@ int gsr_kms_client_init(gsr_kms_client *self, const char *card_path) {
}
}
}
- fprintf(stderr, "gsr info: gsr_kms_client_init: client connected\n");
+ fprintf(stderr, "gsr info: gsr_kms_client_init: server connected\n");
return 0;
@@ -227,11 +220,6 @@ int gsr_kms_client_init(gsr_kms_client *self, const char *card_path) {
}
void gsr_kms_client_deinit(gsr_kms_client *self) {
- if(self->card_path) {
- free(self->card_path);
- self->card_path = NULL;
- }
-
if(self->client_fd != -1) {
close(self->client_fd);
self->client_fd = -1;
@@ -261,7 +249,6 @@ int gsr_kms_client_get_kms(gsr_kms_client *self, gsr_kms_response *response) {
gsr_kms_request request;
request.type = KMS_REQUEST_TYPE_GET_KMS;
- strcpy(request.data.card_path, self->card_path);
if(send_msg_to_server(self->client_fd, &request) == -1) {
fprintf(stderr, "gsr error: gsr_kms_client_get_kms: failed to send request message to server\n");
return -1;
diff --git a/kms/client/kms_client.h b/kms/client/kms_client.h
index 41de507..dceef20 100644
--- a/kms/client/kms_client.h
+++ b/kms/client/kms_client.h
@@ -9,7 +9,6 @@ typedef struct {
int socket_fd;
int client_fd;
char socket_path[255];
- char *card_path;
} gsr_kms_client;
/* |card_path| should be a path to card, for example /dev/dri/card0 */
diff --git a/kms/kms_shared.h b/kms/kms_shared.h
index f63c2f3..35d54c4 100644
--- a/kms/kms_shared.h
+++ b/kms/kms_shared.h
@@ -10,18 +10,12 @@ typedef enum {
typedef enum {
KMS_RESULT_OK,
KMS_RESULT_INVALID_REQUEST,
- KMS_RESULT_FAILED_TO_OPEN_CARD,
- KMS_RESULT_INSUFFICIENT_PERMISSIONS,
- KMS_RESULT_FAILED_TO_GET_KMS,
- KMS_RESULT_NO_KMS_AVAILABLE,
+ KMS_RESULT_FAILED_TO_GET_PLANE,
KMS_RESULT_FAILED_TO_SEND
} gsr_kms_result;
typedef struct {
int type; /* gsr_kms_request_type */
- union {
- char card_path[255];
- } data;
} gsr_kms_request;
typedef struct {
diff --git a/kms/server/kms_server.c b/kms/server/kms_server.c
index 73cf9d0..7d0ed5c 100644
--- a/kms/server/kms_server.c
+++ b/kms/server/kms_server.c
@@ -16,6 +16,11 @@
#define DRM_CLIENT_CAP_UNIVERSAL_PLANES 2
+typedef struct {
+ int drmfd;
+ uint32_t plane_id;
+} gsr_drm;
+
static int max_int(int a, int b) {
return a > b ? a : b;
}
@@ -57,99 +62,135 @@ static int send_msg_to_client(int client_fd, gsr_kms_response *response, int *fd
return sendmsg(client_fd, &response_message, 0);
}
-static int get_kms(const char *card_path, gsr_kms_response *response) {
- response->result = KMS_RESULT_OK;
- response->data.fd.fd = 0;
- response->data.fd.width = 0;
- response->data.fd.height = 0;
-
- const int drmfd = open(card_path, O_RDONLY);
- if (drmfd < 0) {
- response->result = KMS_RESULT_FAILED_TO_OPEN_CARD;
- snprintf(response->data.err_msg, sizeof(response->data.err_msg), "failed to open %s, error: %s", card_path, strerror(errno));
- return -1;
- }
+static int kms_get_plane_id(gsr_drm *drm) {
+ drmModePlaneResPtr planes = NULL;
+ drmModePlanePtr plane = NULL;
+ drmModeFB2Ptr drmfb = NULL;
+ int result = -1;
- if (0 != drmSetClientCap(drmfd, DRM_CLIENT_CAP_UNIVERSAL_PLANES, 1)) {
- response->result = KMS_RESULT_INSUFFICIENT_PERMISSIONS;
- snprintf(response->data.err_msg, sizeof(response->data.err_msg), "drmSetClientCap failed, error: %s", strerror(errno));
- close(drmfd);
- return -1;
+ if(drmSetClientCap(drm->drmfd, DRM_CLIENT_CAP_UNIVERSAL_PLANES, 1) != 0) {
+ fprintf(stderr, "kms server error: drmSetClientCap failed, error: %s\n", strerror(errno));
+ goto error;
}
- drmModePlaneResPtr planes = drmModeGetPlaneResources(drmfd);
- if (!planes) {
- response->result = KMS_RESULT_FAILED_TO_GET_KMS;
- snprintf(response->data.err_msg, sizeof(response->data.err_msg), "failed to access planes, error: %s", strerror(errno));
- close(drmfd);
- return -1;
+ planes = drmModeGetPlaneResources(drm->drmfd);
+ if(!planes) {
+ fprintf(stderr, "kms server error: failed to access planes, error: %s\n", strerror(errno));
+ goto error;
}
- fprintf(stderr, "DRM planes %d:\n", planes->count_planes);
- for (uint32_t i = 0; i < planes->count_planes; ++i) {
- drmModePlanePtr plane = drmModeGetPlane(drmfd, planes->planes[i]);
- if (!plane) {
- fprintf(stderr, "Cannot get drmModePlanePtr for plane %#x: %s (%d)\n", planes->planes[i], strerror(errno), errno);
+ for(uint32_t i = 0; i < planes->count_planes; ++i) {
+ plane = drmModeGetPlane(drm->drmfd, planes->planes[i]);
+ if(!plane) {
+ fprintf(stderr, "kms server warning: failed to get drmModePlanePtr for plane %#x: %s (%d)\n", planes->planes[i], strerror(errno), errno);
continue;
}
- fprintf(stderr, "\t%d: fb_id=%#x\n", i, plane->fb_id);
-
- if (!plane->fb_id)
- goto plane_continue;
-
- drmModeFB2Ptr drmfb = drmModeGetFB2(drmfd, plane->fb_id);
- if (!drmfb) {
- fprintf(stderr, "Cannot get drmModeFBPtr for fb %#x: %s (%d)\n", plane->fb_id, strerror(errno), errno);
- } else {
- if (!drmfb->handles[0]) {
- fprintf(stderr, "\t\tFB handle for fb %#x is NULL\n", plane->fb_id);
- fprintf(stderr, "\t\tPossible reason: not permitted to get FB handles. Do `sudo setcap cap_sys_admin+ep`\n");
- } else {
- int fb_fd = -1;
- const int ret = drmPrimeHandleToFD(drmfd, drmfb->handles[0], 0, &fb_fd);
- if (ret != 0 || fb_fd == -1) {
- fprintf(stderr, "Cannot get fd for fb %#x handle %#x: %s (%d)\n", plane->fb_id, drmfb->handles[0], strerror(errno), errno);
- } else if(drmfb->width * drmfb->height > response->data.fd.width * response->data.fd.height) {
- if(response->data.fd.fd != 0) {
- close(response->data.fd.fd);
- response->data.fd.fd = 0;
- }
-
- response->data.fd.fd = fb_fd;
- response->data.fd.width = drmfb->width;
- response->data.fd.height = drmfb->height;
- response->data.fd.pitch = drmfb->pitches[0];
- response->data.fd.offset = drmfb->offsets[0];
- response->data.fd.pixel_format = drmfb->pixel_format;
- response->data.fd.modifier = drmfb->modifier;
- fprintf(stderr, "kms width: %u, height: %u, pixel format: %u, modifier: %lu\n", response->data.fd.width, response->data.fd.height, response->data.fd.pixel_format, response->data.fd.modifier);
- } else {
- close(fb_fd);
- }
- }
- drmModeFreeFB2(drmfb);
+ if(!plane->fb_id) {
+ drmModeFreePlane(plane);
+ continue;
}
- plane_continue:
+ break;
+ }
+
+ if(!plane) {
+ fprintf(stderr, "kms server error: failed to find a usable plane\n");
+ goto error;
+ }
+
+ // TODO: Fallback to getfb(1)?
+ drmfb = drmModeGetFB2(drm->drmfd, plane->fb_id);
+ if(!drmfb) {
+ fprintf(stderr, "kms server error: drmModeGetFB2 failed on plane fb id %d, error: %s\n", plane->fb_id, strerror(errno));
+ goto error;
+ }
+
+ if(!drmfb->handles[0]) {
+ fprintf(stderr, "kms server error: drmfb handle is NULL\n");
+ goto error;
+ }
+
+ drm->plane_id = plane->plane_id;
+ result = 0;
+
+ error:
+ if(drmfb)
+ drmModeFreeFB2(drmfb);
+ if(plane)
drmModeFreePlane(plane);
+ if(planes)
+ drmModeFreePlaneResources(planes);
+
+ return result;
+}
+
+static int kms_get_fb(gsr_drm *drm, gsr_kms_response *response) {
+ drmModePlanePtr plane = NULL;
+ drmModeFB2 *drmfb = NULL;
+ int result = -1;
+
+ response->result = KMS_RESULT_OK;
+ response->data.fd.fd = 0;
+ response->data.fd.width = 0;
+ response->data.fd.height = 0;
+
+ plane = drmModeGetPlane(drm->drmfd, drm->plane_id);
+ if(!plane) {
+ response->result = KMS_RESULT_FAILED_TO_GET_PLANE;
+ snprintf(response->data.err_msg, sizeof(response->data.err_msg), "failed to get drm plane with id %u, error: %s\n", drm->plane_id, strerror(errno));
+ fprintf(stderr, "kms server error: %s\n", response->data.err_msg);
+ goto error;
+ }
+
+ drmfb = drmModeGetFB2(drm->drmfd, plane->fb_id);
+ if(!drmfb) {
+ response->result = KMS_RESULT_FAILED_TO_GET_PLANE;
+ snprintf(response->data.err_msg, sizeof(response->data.err_msg), "drmModeGetFB2 failed, error: %s", strerror(errno));
+ fprintf(stderr, "kms server error: %s\n", response->data.err_msg);
+ goto error;
+ }
+
+ if(!drmfb->handles[0]) {
+ response->result = KMS_RESULT_FAILED_TO_GET_PLANE;
+ snprintf(response->data.err_msg, sizeof(response->data.err_msg), "drmfb handle is NULL");
+ fprintf(stderr, "kms server error: %s\n", response->data.err_msg);
+ goto error;
}
- drmModeFreePlaneResources(planes);
- close(drmfd);
+ // TODO: Check if dimensions have changed by comparing width and height to previous time this was called.
+ // TODO: Support other plane formats than rgb (with multiple planes, such as direct YUV420 on wayland).
- if(response->data.fd.fd == 0) {
- response->result = KMS_RESULT_NO_KMS_AVAILABLE;
- snprintf(response->data.err_msg, sizeof(response->data.err_msg), "no kms found");
- return -1;
+ int fb_fd = -1;
+ const int ret = drmPrimeHandleToFD(drm->drmfd, drmfb->handles[0], O_RDONLY, &fb_fd);
+ if(ret != 0 || fb_fd == -1) {
+ response->result = KMS_RESULT_FAILED_TO_GET_PLANE;
+ snprintf(response->data.err_msg, sizeof(response->data.err_msg), "failed to get fd from drm handle, error: %s", strerror(errno));
+ fprintf(stderr, "kms server error: %s\n", response->data.err_msg);
+ goto error;
}
- return 0;
+ response->data.fd.fd = fb_fd;
+ response->data.fd.width = drmfb->width;
+ response->data.fd.height = drmfb->height;
+ response->data.fd.pitch = drmfb->pitches[0];
+ response->data.fd.offset = drmfb->offsets[0];
+ response->data.fd.pixel_format = drmfb->pixel_format;
+ response->data.fd.modifier = drmfb->modifier;
+ result = 0;
+
+ error:
+ if(drmfb)
+ drmModeFreeFB2(drmfb);
+ if(plane)
+ drmModeFreePlane(plane);
+
+ return result;
}
int main(int argc, char **argv) {
- if(argc != 2) {
- fprintf(stderr, "usage: kms_server <domain_socket_path>\n");
+ if(argc != 3) {
+ fprintf(stderr, "usage: kms_server <domain_socket_path> <card_path>\n");
return 1;
}
@@ -160,7 +201,22 @@ int main(int argc, char **argv) {
return 2;
}
- fprintf(stderr, "kms server info: connecting to the server\n");
+ const char *card_path = argv[2];
+
+ gsr_drm drm;
+ drm.plane_id = 0;
+ drm.drmfd = open(card_path, O_RDONLY);
+ if(drm.drmfd < 0) {
+ fprintf(stderr, "kms server error: failed to open %s, error: %s", card_path, strerror(errno));
+ return 2;
+ }
+
+ if(kms_get_plane_id(&drm) != 0) {
+ close(drm.drmfd);
+ return 2;
+ }
+
+ fprintf(stderr, "kms server info: connecting to the client\n");
for(;;) {
struct sockaddr_un remote_addr = {0};
remote_addr.sun_family = AF_UNIX;
@@ -171,11 +227,13 @@ int main(int argc, char **argv) {
continue; // Host not ready yet? TODO: sleep
if(errno == EISCONN) // TODO?
break;
+
fprintf(stderr, "kms server error: connect failed, error: %s (%d)\n", strerror(errno), errno);
+ close(drm.drmfd);
return 2;
}
}
- fprintf(stderr, "kms server info: connected to the server\n");
+ fprintf(stderr, "kms server info: connected to the client\n");
int res = 0;
for(;;) {
@@ -202,33 +260,27 @@ int main(int argc, char **argv) {
}
continue;
}
- request.data.card_path[254] = '\0';
switch(request.type) {
case KMS_REQUEST_TYPE_GET_KMS: {
gsr_kms_response response;
- int kms_fd = 0;
- if (get_kms(request.data.card_path, &response) == 0) {
- kms_fd = response.data.fd.fd;
- }
-
- if(send_msg_to_client(socket_fd, &response, &kms_fd, kms_fd == 0 ? 0 : 1) == -1) {
- fprintf(stderr, "kms server error: failed to respond to client KMS_REQUEST_TYPE_GET_KMS request\n");
- if(kms_fd != 0)
- close(kms_fd);
- break;
+
+ if(kms_get_fb(&drm, &response) == 0) {
+ if(send_msg_to_client(socket_fd, &response, &response.data.fd.fd, 1) == -1)
+ fprintf(stderr, "kms server error: failed to respond to client KMS_REQUEST_TYPE_GET_KMS request\n");
+ close(response.data.fd.fd);
+ } else {
+ if(send_msg_to_client(socket_fd, &response, NULL, 0) == -1)
+ fprintf(stderr, "kms server error: failed to respond to client KMS_REQUEST_TYPE_GET_KMS request\n");
}
- if(kms_fd != 0)
- close(kms_fd);
-
break;
}
default: {
gsr_kms_response response;
response.result = KMS_RESULT_INVALID_REQUEST;
snprintf(response.data.err_msg, sizeof(response.data.err_msg), "invalid request type %d, expected %d (%s)", request.type, KMS_REQUEST_TYPE_GET_KMS, "KMS_REQUEST_TYPE_GET_KMS");
- fprintf(stderr, "%s\n", response.data.err_msg);
+ fprintf(stderr, "kms server error: %s\n", response.data.err_msg);
if(send_msg_to_client(socket_fd, &response, NULL, 0) == -1) {
fprintf(stderr, "kms server error: failed to respond to client request\n");
break;
@@ -239,6 +291,7 @@ int main(int argc, char **argv) {
}
done:
+ close(drm.drmfd);
close(socket_fd);
return res;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-28 21:41:05 +0000