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src/util/libdrm.h

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+/*
+ * Copyright © 2023 Google, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+/*
+ * A simple header that either gives you the real libdrm or a no-op shim,
+ * depending on whether HAVE_LIBDRM is defined.  This is intended to avoid
+ * the proliferation of #ifdef'ery to support environments without libdrm.
+ */
+
+#ifndef LIBDRM_H
+#define LIBDRM_H
+
+#ifdef HAVE_LIBDRM
+#include <xf86drm.h>
+#else
+
+#include <errno.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <sys/types.h>
+
+#define DRM_NODE_PRIMARY 0
+#define DRM_NODE_CONTROL 1
+#define DRM_NODE_RENDER  2
+#define DRM_NODE_MAX     3
+
+#define DRM_BUS_PCI       0
+#define DRM_BUS_USB       1
+#define DRM_BUS_PLATFORM  2
+#define DRM_BUS_HOST1X    3
+
+typedef unsigned int drm_magic_t;
+
+static int
+drmGetMagic(int fd, drm_magic_t * magic)
+{
+  return -EINVAL;
+}
+
+typedef struct _drmPciDeviceInfo {
+    uint16_t vendor_id;
+    uint16_t device_id;
+    uint16_t subvendor_id;
+    uint16_t subdevice_id;
+    uint8_t revision_id;
+} drmPciDeviceInfo, *drmPciDeviceInfoPtr;
+
+#define DRM_PLATFORM_DEVICE_NAME_LEN 512
+
+typedef struct _drmPlatformBusInfo {
+    char fullname[DRM_PLATFORM_DEVICE_NAME_LEN];
+} drmPlatformBusInfo, *drmPlatformBusInfoPtr;
+
+typedef struct _drmPlatformDeviceInfo {
+    char **compatible; /* NULL terminated list of compatible strings */
+} drmPlatformDeviceInfo, *drmPlatformDeviceInfoPtr;
+
+#define DRM_HOST1X_DEVICE_NAME_LEN 512
+
+typedef struct _drmHost1xBusInfo {
+    char fullname[DRM_HOST1X_DEVICE_NAME_LEN];
+} drmHost1xBusInfo, *drmHost1xBusInfoPtr;
+
+typedef struct _drmPciBusInfo {
+   uint16_t domain;
+   uint8_t bus;
+   uint8_t dev;
+   uint8_t func;
+} drmPciBusInfo, *drmPciBusInfoPtr;
+
+typedef struct _drmDevice {
+    char **nodes; /* DRM_NODE_MAX sized array */
+    int available_nodes; /* DRM_NODE_* bitmask */
+    int bustype;
+    union {
+       drmPciBusInfoPtr pci;
+       drmPlatformBusInfoPtr platform;
+       drmHost1xBusInfoPtr host1x;
+    } businfo;
+    union {
+        drmPciDeviceInfoPtr pci;
+    } deviceinfo;
+    /* ... */
+} drmDevice, *drmDevicePtr;
+
+#define DRM_DEVICE_GET_PCI_REVISION (1 << 0)
+static inline int
+drmGetDevice2(int fd, uint32_t flags, drmDevicePtr *device)
+{
+   return -ENOENT;
+}
+
+static inline int
+drmGetDevices2(uint32_t flags, drmDevicePtr devices[], int max_devices)
+{
+   return -ENOENT;
+}
+
+static inline int
+drmGetDeviceFromDevId(dev_t dev_id, uint32_t flags, drmDevicePtr *device)
+{
+   return -ENOENT;
+}
+
+static inline void
+drmFreeDevice(drmDevicePtr *device) {}
+
+static inline void
+drmFreeDevices(drmDevicePtr devices[], int count) {}
+
+static inline char*
+drmGetDeviceNameFromFd2(int fd) { return NULL;}
+
+static inline int
+drmGetNodeTypeFromFd(int fd)
+{
+   return -1;
+}
+
+static inline char *
+drmGetRenderDeviceNameFromFd(int fd)
+{
+   return NULL;
+}
+
+typedef struct _drmVersion {
+    int     version_major;        /**< Major version */
+    int     version_minor;        /**< Minor version */
+    int     version_patchlevel;   /**< Patch level */
+    int     name_len;             /**< Length of name buffer */
+    char    *name;                /**< Name of driver */
+    int     date_len;             /**< Length of date buffer */
+    char    *date;                /**< User-space buffer to hold date */
+    int     desc_len;             /**< Length of desc buffer */
+    char    *desc;                /**< User-space buffer to hold desc */
+} drmVersion, *drmVersionPtr;
+
+static inline struct _drmVersion *
+drmGetVersion(int fd) { return NULL; }
+
+static inline void
+drmFreeVersion(struct _drmVersion *v) {}
+
+#endif
+
+#endif