--- /dev/null
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+That's all there is to it!
--- /dev/null
+/*********************************************************
+ * Copyright (C) 2021 VMware, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation version 2.1 and no later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the Lesser GNU General Public
+ * License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ *********************************************************/
+
+/*
+ * main.c --
+ *
+ * vmwgfxctrl is a utility application used to control the
+ * vmwgfx drm linux kernel driver.
+ *
+ *
+ * To print the information about the current display topology
+ * vmwgfxctrl --print-topology
+ *
+ * Setting topology will most likely require root privileges
+ * sudo vmwgfxctrl --set-topology 1024x768+0+0
+ *
+ * The format to set-topology is
+ * sudo vmwgfxctrl --set-topology WxH+x+y
+ *
+ * with "WxH+x+y" repeated as many times as the number of screens
+ * being set e.g.
+ * sudo vmwgfxctrl --set-topology 800x600+0+0 800x600+800+0
+ * will set two screen right next to each other (the second starts at
+ * x=800, where the first one ends), both with height of 600.
+ *
+ */
+
+#include "vm_basic_defs.h"
+#include "resolutionDL.h"
+
+#include <assert.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+/* The DRM device we are looking for */
+#define VMWGFXCTRL_VENDOR "0x15ad"
+#define VMWGFXCTRL_DEVICE "0x0405"
+#define VMWGFXCTRL_KERNELNAME "vmwgfx"
+
+/* Required DRM version for resolutionKMS */
+#define VMWGFXCTRL_DRM_MAJOR 2
+#define VMWGFXCTRL_DRM_MINOR 14
+
+static int
+vmwgfxOpenDRM(const char *node) // IN: Device node base name.
+{
+ struct udev *udev;
+ struct udev_enumerate *enumerate;
+ struct udev_list_entry *devices, *devListEntry;
+ struct udev_device *dev;
+ int fd = -1;
+ int drmFd;
+ const char *devNode = NULL;
+
+ /* Force load the kernel module. */
+ drmFd = drmOpen(VMWGFXCTRL_KERNELNAME, NULL);
+ if (drmFd >= 0) {
+ (void) drmDropMaster(drmFd);
+ }
+
+ udev = udev_new();
+ if (!udev) {
+ goto outNoUdev;
+ }
+
+ /*
+ * Udev error return codes that are not caught immediately are
+ * typically caught in the input argument check in the udev
+ * function calls following the failing call!
+ */
+ enumerate = udev_enumerate_new(udev);
+ if (udev_enumerate_add_match_subsystem(enumerate, "drm")) {
+ goto outErr;
+ }
+ if (udev_enumerate_add_match_property(enumerate, "DEVTYPE", "drm_minor")) {
+ goto outErr;
+ }
+ if (udev_enumerate_scan_devices(enumerate)) {
+ goto outErr;
+ }
+
+ devices = udev_enumerate_get_list_entry(enumerate);
+ udev_list_entry_foreach(devListEntry, devices) {
+ const char *path, *vendor, *device;
+ struct udev_device *parent;
+
+ path = udev_list_entry_get_name(devListEntry);
+ if (!path) {
+ continue;
+ }
+ if (!strstr(path, node)) {
+ continue;
+ }
+
+ dev = udev_device_new_from_syspath(udev, path);
+ if (!dev) {
+ goto outErr;
+ }
+
+ parent = udev_device_get_parent_with_subsystem_devtype(dev,
+ "pci",
+ NULL);
+ if (!parent) {
+ goto skipCheck;
+ }
+
+ vendor = udev_device_get_sysattr_value(parent, "vendor");
+ device = udev_device_get_sysattr_value(parent, "device");
+ if (!vendor || !device) {
+ goto skipCheck;
+ }
+
+ if (strcmp(vendor, VMWGFXCTRL_VENDOR) != 0 ||
+ strcmp(device, VMWGFXCTRL_DEVICE) != 0) {
+ goto skipCheck;
+ }
+
+ devNode = udev_device_get_devnode(dev);
+ if (!devNode) {
+ goto outFound;
+ }
+
+ fd = open(devNode, O_RDWR);
+ udev_device_unref(dev);
+ break;
+
+skipCheck:
+ udev_device_unref(dev);
+ }
+
+ udev_enumerate_unref(enumerate);
+ udev_unref(udev);
+
+ if (drmFd >= 0) {
+ drmClose(drmFd);
+ }
+
+ return fd;
+
+outFound:
+ udev_device_unref(dev);
+outErr:
+ udev_enumerate_unref(enumerate);
+ udev_unref(udev);
+outNoUdev:
+ if (drmFd >= 0) {
+ drmClose(drmFd);
+ }
+
+ return -1;
+}
+
+
+static bool
+checkDRMVersion(int fd) // IN: An open DRM file descriptor.
+{
+ drmVersionPtr ver = drmGetVersion(fd);
+
+ if (!ver) {
+ fprintf(stderr, "%s: Failed to get DRM version.\n", __func__);
+ return false;
+ }
+
+ if (ver->version_major != VMWGFXCTRL_DRM_MAJOR ||
+ ver->version_minor < VMWGFXCTRL_DRM_MINOR) {
+ fprintf(stderr, "%s: Insufficient DRM version %d.%d for resolutionKMS.\n",
+ __func__, ver->version_major, ver->version_minor);
+ drmFreeVersion(ver);
+ return false;
+ }
+ printf("DRM version %d.%d.\n", ver->version_major, ver->version_minor);
+
+ drmFreeVersion(ver);
+ return true;
+}
+
+static int
+vmwgfxOpen(bool use_render_node)
+{
+ int fd = -1;
+
+ if (use_render_node) {
+ fd = vmwgfxOpenDRM("renderD");
+ if (fd < 0) {
+ fprintf(stderr, "%s: Failed to open DRM render node.\n", __func__);
+ }
+ }
+ if (fd < 0) {
+ fd = vmwgfxOpenDRM("card");
+ if (fd >= 0) {
+ (void) drmDropMaster(fd);
+ }
+ }
+ if (fd < 0) {
+ fprintf(stderr, "%s: Failed to open DRM card node.\n", __func__);
+ goto outErr;
+ }
+
+ if (checkDRMVersion(fd)) {
+ return fd;
+ }
+
+ close(fd);
+outErr:
+ return -1;
+}
+
+static bool
+setTopology(int fd,
+ const struct drm_vmw_rect *rects,
+ unsigned int num_rects)
+{
+ struct drm_vmw_update_layout_arg arg;
+ int ret;
+
+ memset(&arg, 0, sizeof arg);
+ arg.num_outputs = num_rects;
+ arg.rects = (unsigned long) rects;
+
+ ret = drmCommandWrite(fd, DRM_VMW_UPDATE_LAYOUT, &arg, sizeof arg);
+ if (ret < 0) {
+ fprintf(stderr, "%s, Error: write to kernel failed: %d\n",
+ __func__, ret);
+ return false;
+ }
+
+ return true;
+}
+
+static bool
+parseRects(uint32_t num_rects,
+ int arg,
+ char **argv,
+ struct drm_vmw_rect **rects)
+{
+ /*
+ * The argument string will look something like:
+ * WxH+x+y * count.
+ *
+ * e.g.
+ * 640x480+0+0 640x480+640+0 640x480+1280+0
+ * will set three 640x480 screens horizontally next to
+ * each other (i.e. one 1920x480 viewport)
+ */
+
+ *rects = malloc(sizeof *rects[0] * num_rects);
+ if (!*rects) {
+ fprintf(stderr,
+ "Failed to alloc buffer for display info");
+ return false;
+ }
+
+ for (uint32_t j = 0; j < num_rects; ++j) {
+ char *p = argv[arg++];
+ if (sscanf(p, "%ux%u+%d+%d", &(*rects)[j].w, &(*rects)[j].h,
+ &(*rects)[j].x, &(*rects)[j].y) != 4) {
+ fprintf(stderr,
+ "Couldn't parse screen dimensions for topology #%d: '%s'. Expected WxH+x+y format (no spaces).\n",
+ j, p);
+ return false;
+ }
+ }
+ return true;
+}
+
+static const char *connector_type_names[] = {
+ "unknown",
+ "VGA",
+ "DVI-I",
+ "DVI-D",
+ "DVI-A",
+ "composite",
+ "s-video",
+ "LVDS",
+ "component",
+ "9-pin DIN",
+ "DP",
+ "HDMI-A",
+ "HDMI-B",
+ "TV",
+ "eDP",
+ "Virtual",
+ "DSI",
+ "DPI",
+ "WRITEBACK"
+};
+
+
+
+static void
+printProperty(int fd, int idx, drmModePropertyPtr props, uint64_t value)
+{
+ int j;
+
+ printf("\t %d: %s (id=%i, flags=%i, count_values=%d)\n", idx, props->name,
+ props->prop_id, props->flags, props->count_values);
+
+ if (props->count_values) {
+ printf("\t\tvalues :");
+ for (j = 0; j < props->count_values; j++) {
+ printf(" %" PRIu64, props->values[j]);
+ }
+ printf("\n");
+ }
+
+
+ printf("\t\tcount_enums : %d\n", props->count_enums);
+
+ if (props->flags & DRM_MODE_PROP_BLOB) {
+ drmModePropertyBlobPtr blob;
+
+ blob = drmModeGetPropertyBlob(fd, value);
+ if (blob) {
+ printf("\t\tblob is %d length, %08X\n", blob->length, *(uint32_t *)blob->data);
+ drmModeFreePropertyBlob(blob);
+ } else {
+ printf("\t\terror getting blob %" PRIu64 "\n", value);
+ }
+
+ } else {
+ const char *name = NULL;
+ for (j = 0; j < props->count_enums; j++) {
+ printf("\t\t\t%lld = %s\n", props->enums[j].value, props->enums[j].name);
+ if (props->enums[j].value == value) {
+ name = props->enums[j].name;
+ }
+ }
+
+ if (props->count_enums && name) {
+ printf("\t\tcon_value : %s\n", name);
+ } else {
+ printf("\t\tcon_value : %" PRIu64 "\n", value);
+ }
+ }
+}
+
+
+static void
+printMode(const struct drm_mode_modeinfo *mode, int idx, bool verbose)
+{
+ if (verbose) {
+ printf("\t %d: %s\n", idx, mode->name);
+ printf("\t\tclock : %i\n", mode->clock);
+ printf("\t\thdisplay : %i\n", mode->hdisplay);
+ printf("\t\thsync_start : %i\n", mode->hsync_start);
+ printf("\t\thsync_end : %i\n", mode->hsync_end);
+ printf("\t\thtotal : %i\n", mode->htotal);
+ printf("\t\thskew : %i\n", mode->hskew);
+ printf("\t\tvdisplay : %i\n", mode->vdisplay);
+ printf("\t\tvsync_start : %i\n", mode->vsync_start);
+ printf("\t\tvsync_end : %i\n", mode->vsync_end);
+ printf("\t\tvtotal : %i\n", mode->vtotal);
+ printf("\t\tvscan : %i\n", mode->vscan);
+ printf("\t\tvrefresh : %i\n", mode->vrefresh);
+ printf("\t\tflags : %i\n", mode->flags);
+ } else {
+ printf("\t %d: \"%s\" %ix%i %i\n", idx,
+ mode->name, mode->hdisplay,
+ mode->vdisplay, mode->vrefresh);
+ }
+}
+
+
+static const char *
+drmModeConnectionToString(drmModeConnection modeConnection)
+{
+ switch (modeConnection) {
+ case DRM_MODE_CONNECTED:
+ return "DRM_MODE_CONNECTED";
+ case DRM_MODE_DISCONNECTED:
+ return "DRM_MODE_DISCONNECTED";
+ case DRM_MODE_UNKNOWNCONNECTION:
+ return "DRM_MODE_UNKNOWNCONNECTION";
+ default:
+ return "invalid";
+ }
+}
+
+
+static void
+printTopology(void)
+{
+ int fd = vmwgfxOpen(false);
+ if (fd < 0) {
+ fprintf(stderr, "Wasn't able to open the drm device\n");
+ exit(1);
+ }
+
+ drmModeResPtr res = drmModeGetResources(fd);
+ if (res == 0) {
+ printf("Failed to get resources from card\n");
+ drmClose(fd);
+ return;
+ }
+
+ printf("Resources\n");
+ printf(" count_connectors : %i\n", res->count_connectors);
+ printf(" count_encoders : %i\n", res->count_encoders);
+ printf(" count_crtcs : %i\n", res->count_crtcs);
+ printf(" count_fbs : %i\n", res->count_fbs);
+ printf(" min_size : [%u, %u]\n", res->min_width, res->min_height);
+ printf(" max_size : [%u, %u]\n", res->max_width, res->max_height);
+ printf("\n");
+
+ for (int i = 0; i < res->count_connectors; i++) {
+ drmModeConnectorPtr connector = drmModeGetConnector(fd, res->connectors[i]);
+ if (!connector) {
+ printf("Could not get connector %i\n", res->connectors[i]);
+ continue;
+ }
+
+ assert(ARRAYSIZE(connector_type_names) > connector->connector_type);
+ const char *connector_type_name =
+ connector_type_names[connector->connector_type];
+ printf("Connector: %s-%d (%s)\n", connector_type_name,
+ connector->connector_type_id,
+ drmModeConnectionToString(connector->connection));
+
+ if (connector->connection == DRM_MODE_CONNECTED) {
+ printf("\tencoder id : %i\n", connector->encoder_id);
+ printf("\tsize : %ix%i (mm)\n", connector->mmWidth, connector->mmHeight);
+ printf("\tcount_modes : %i\n", connector->count_modes);
+ printf("\tcount_props : %i\n", connector->count_props);
+
+ if (connector->count_props) {
+ printf("\tProperties:\n");
+ }
+ for (int j = 0; j < connector->count_props; j++) {
+ drmModePropertyPtr props = drmModeGetProperty(fd, connector->props[j]);
+ if (props) {
+ printProperty(fd, j, props, connector->prop_values[j]);
+ drmModeFreeProperty(props);
+ }
+ }
+ if (connector->count_modes) {
+ printf("\tModes:\n");
+ }
+ for (int j = 0; j < connector->count_modes; j++) {
+ struct drm_mode_modeinfo *mode = (struct drm_mode_modeinfo *)&connector->modes[j];
+ printMode(mode, j, false);
+ }
+ }
+
+ drmModeFreeConnector(connector);
+ }
+ printf("\n");
+
+ drmModeFreeResources(res);
+
+ close(fd);
+}
+
+static void
+run(int argc, char **argv)
+{
+ for (int i = 1; i < argc; ++i) {
+ if (strcmp(argv[i], "--help") == 0) {
+ printf("%s: \n", argv[0]);
+ printf("\t--help prints out the help screen\n");
+ printf("\t--print-topology prints out the currently set topology\n");
+ printf("\t--set-topology WxH+x+y (WxH+x+y repeated for each screen)\n");
+ printf("\t\te.g. 640x480+0+0 800x480+640+0 640x800+0+480\n");
+ return;
+ } else if (strcmp(argv[i], "--set-topology") == 0) {
+ struct drm_vmw_rect *rects;
+ uint32_t num_rects = argc - i - 1;
+
+ if (num_rects == 0) {
+ fprintf(stderr, "%s: set-topology is missing the dimensions\n",
+ argv[0]);
+ exit(1);
+ }
+ if (!parseRects(num_rects, i + 1, argv, &rects)) {
+ exit(1);
+ }
+
+ printf("Setting topology for %d screens", num_rects);
+ for (uint32_t j = 0; j < num_rects; ++j) {
+ printf(", [%d, %d, %u, %u]",
+ rects[j].x, rects[j].y,
+ rects[j].w, rects[j].h);
+ }
+ printf("\n");
+
+ int fd = vmwgfxOpen(true);
+ if (fd < 0) {
+ fprintf(stderr, "Wasn't able to open the drm device\n");
+ free(rects);
+ exit(1);
+ }
+ setTopology(fd, rects, num_rects);
+ close(fd);
+ free(rects);
+ return;
+ } else if (strcmp(argv[i], "--print-topology") == 0) {
+ printTopology();
+ return;
+ } else {
+ fprintf(stderr, "Unknown argument '%s'\n", argv[i]);
+ exit(1);
+ }
+ }
+}
+
+int main(int argc, char **argv)
+{
+ run(argc, argv);
+
+ return 0;
+}
projects / thirdparty / open-vm-tools.git / commitdiff
