gbm: Use the kms dumb ioctls for cursor instead of libkms

We need to create bos suitable for cursor usage that we can map and
write data into.  The kms dumb ioctls is all we need for this, so drop
the dependency on libkms.

configure.ac

@@ -1222,8 +1222,6 @@ if test "x$enable_gbm" = xyes; then
         if test "x$enable_shared_glapi" = xno; then
             AC_MSG_ERROR([gbm_dri requires --enable-shared-glapi])
         fi
-        PKG_CHECK_MODULES([LIBKMS], [libkms], [],
-                          AC_MSG_ERROR([gbm needs libkms]))
     fi
 fi
 GBM_PC_REQ_PRIV="libudev"

src/gbm/backends/dri/gbm_dri.c

@@ -33,8 +33,10 @@
 #include <limits.h>
 
 #include <sys/types.h>
+#include <sys/mman.h>
 #include <unistd.h>
 #include <dlfcn.h>
+#include <xf86drm.h>
 
 #include <GL/gl.h> /* dri_interface needs GL types */
 #include <GL/internal/dri_interface.h>
@@ -300,19 +302,12 @@ static int
 gbm_dri_bo_write(struct gbm_bo *_bo, const void *buf, size_t count)
 {
    struct gbm_dri_bo *bo = gbm_dri_bo(_bo);
-   void *ptr;
-   int ret;
-
-   if (bo->bo == NULL)
-      return -1;
 
-   ret = kms_bo_map(bo->bo, &ptr);
-   if (ret < 0)
+   if (bo->image != NULL)
       return -1;
 
-   memcpy(ptr, buf, count);
+   memcpy(bo->map, buf, count);
 
-   kms_bo_unmap(bo->bo);
    return 0;
 }
 
@@ -321,11 +316,17 @@ gbm_dri_bo_destroy(struct gbm_bo *_bo)
 {
    struct gbm_dri_device *dri = gbm_dri_device(_bo->gbm);
    struct gbm_dri_bo *bo = gbm_dri_bo(_bo);
+   struct drm_mode_destroy_dumb arg;
 
-   if (bo->image != NULL)
+   if (bo->image != NULL) {
       dri->image->destroyImage(bo->image);
-   if (bo->bo != NULL)
-      kms_bo_destroy(&bo->bo);
+   } else {
+      munmap(bo->map, bo->size);
+      memset(&arg, 0, sizeof(arg));
+      arg.handle = bo->handle;
+      drmIoctl(dri->base.base.fd, DRM_IOCTL_MODE_DESTROY_DUMB, &arg);
+   }
+
    free(bo);
 }
 
@@ -448,49 +449,86 @@ gbm_dri_bo_import(struct gbm_device *gbm,
 }
 
 static struct gbm_bo *
-gbm_dri_bo_create(struct gbm_device *gbm,
+create_dumb(struct gbm_device *gbm,
                   uint32_t width, uint32_t height,
                   uint32_t format, uint32_t usage)
 {
    struct gbm_dri_device *dri = gbm_dri_device(gbm);
+   struct drm_mode_create_dumb create_arg;
+   struct drm_mode_map_dumb map_arg;
    struct gbm_dri_bo *bo;
-   int dri_format;
-   unsigned dri_use = 0;
+   struct drm_mode_destroy_dumb destroy_arg;
+   int ret;
+
+   if (!(usage & GBM_BO_USE_CURSOR_64X64))
+      return NULL;
+   if (format != GBM_FORMAT_ARGB8888)
+      return NULL;
 
    bo = calloc(1, sizeof *bo);
    if (bo == NULL)
       return NULL;
 
+   create_arg.bpp = 32;
+   create_arg.width = width;
+   create_arg.height = height;
+
+   ret = drmIoctl(dri->base.base.fd, DRM_IOCTL_MODE_CREATE_DUMB, &create_arg);
+   if (ret)
+      goto free_bo;
+
    bo->base.base.gbm = gbm;
    bo->base.base.width = width;
    bo->base.base.height = height;
+   bo->base.base.stride = create_arg.pitch;
+   bo->base.base.handle.u32 = create_arg.handle;
+   bo->handle = create_arg.handle;
+   bo->size = create_arg.size;
 
-   if (usage & GBM_BO_USE_WRITE) {
-      int ret;
-      unsigned attrs[7] = {
-         KMS_WIDTH, 64,
-         KMS_HEIGHT, 64,
-         KMS_BO_TYPE, KMS_BO_TYPE_SCANOUT_X8R8G8B8,
-         KMS_TERMINATE_PROP_LIST,
-      };
+   memset(&map_arg, 0, sizeof(map_arg));
+   map_arg.handle = bo->handle;
 
-      if (!(usage & GBM_BO_USE_CURSOR_64X64))
-         return NULL;
+   ret = drmIoctl(dri->base.base.fd, DRM_IOCTL_MODE_MAP_DUMB, &map_arg);
+   if (ret)
+      goto destroy_dumb;
 
-      if (dri->kms == NULL)
-         return NULL;
+   bo->map = mmap(0, bo->size, PROT_WRITE,
+                  MAP_SHARED, dri->base.base.fd, map_arg.offset);
+   if (bo->map == MAP_FAILED)
+      goto destroy_dumb;
 
-      ret = kms_bo_create(dri->kms, attrs, &bo->bo);
-      if (ret < 0) {
-         free(bo);
-         return NULL;
-      }
+   return &bo->base.base;
+
+destroy_dumb:
+   memset(&destroy_arg, 0, sizeof destroy_arg);
+   destroy_arg.handle = create_arg.handle;
+   drmIoctl(dri->base.base.fd, DRM_IOCTL_MODE_DESTROY_DUMB, &destroy_arg);
+free_bo:
+   free(bo);
 
-      kms_bo_get_prop(bo->bo, KMS_PITCH, &bo->base.base.stride);
-      kms_bo_get_prop(bo->bo, KMS_HANDLE, (unsigned*)&bo->base.base.handle);
+   return NULL;
+}
 
-      return &bo->base.base;
-   }
+static struct gbm_bo *
+gbm_dri_bo_create(struct gbm_device *gbm,
+                  uint32_t width, uint32_t height,
+                  uint32_t format, uint32_t usage)
+{
+   struct gbm_dri_device *dri = gbm_dri_device(gbm);
+   struct gbm_dri_bo *bo;
+   int dri_format;
+   unsigned dri_use = 0;
+
+   if (usage & GBM_BO_USE_WRITE)
+      return create_dumb(gbm, width, height, format, usage);
+
+   bo = calloc(1, sizeof *bo);
+   if (bo == NULL)
+      return NULL;
+
+   bo->base.base.gbm = gbm;
+   bo->base.base.width = width;
+   bo->base.base.height = height;
 
    switch (format) {
    case GBM_FORMAT_RGB565:
@@ -597,10 +635,6 @@ dri_device_create(int fd)
    dri->base.type = GBM_DRM_DRIVER_TYPE_DRI;
    dri->base.base.name = "drm";
 
-   kms_create(fd, &dri->kms);
-   if (dri->kms == NULL)
-      goto err_kms;
-
    ret = dri_screen_create(dri);
    if (ret)
       goto err_dri;
@@ -608,9 +642,8 @@ dri_device_create(int fd)
    return &dri->base.base;
 
 err_dri:
-   kms_destroy(&dri->kms);
-err_kms:
    free(dri);
+
    return NULL;
 }
 

src/gbm/backends/dri/gbm_driint.h

@@ -30,8 +30,6 @@
 
 #include "gbmint.h"
 
-#include "libkms.h"
-
 #include "common.h"
 #include "common_drm.h"
 
@@ -43,9 +41,6 @@ struct gbm_dri_surface;
 struct gbm_dri_device {
    struct gbm_drm_device base;
 
-   /* Only used for cursors */
-   struct kms_driver *kms;
-
    void *driver;
 
    __DRIscreen *screen;
@@ -79,7 +74,8 @@ struct gbm_dri_bo {
    __DRIimage *image;
 
    /* Only used for cursors */
-   struct kms_bo *bo;
+   uint32_t handle, size;
+   void *map;
 };
 
 struct gbm_dri_surface {