lima: Add a noop drm-shim

Hard-code Mali450 with six cores for now, matching the hardware I
have.

Reviewed-by: Vasily Khoruzhick <anarsoul@gmail.com>
Reviewed-by: Erico Nunes <nunes.erico@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12737>

src/gallium/drivers/lima/drm-shim/lima_noop.c

@@ -0,0 +1,120 @@
+/*
+ * Copyright (C) 2021 Icecream95
+ * Copyright (C) 2019 Google LLC
+ *
+ * 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.
+ */
+
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "drm-shim/drm_shim.h"
+#include "drm-uapi/lima_drm.h"
+
+#include "util/u_math.h"
+
+bool drm_shim_driver_prefers_first_render_node = true;
+
+static int
+lima_ioctl_noop(int fd, unsigned long request, void *arg)
+{
+   return 0;
+}
+
+static int
+lima_ioctl_get_param(int fd, unsigned long request, void *arg)
+{
+   struct drm_lima_get_param *gp = arg;
+
+   switch (gp->param) {
+   case DRM_LIMA_PARAM_GPU_ID:
+      gp->value = DRM_LIMA_PARAM_GPU_ID_MALI450;
+      return 0;
+   case DRM_LIMA_PARAM_NUM_PP:
+      gp->value = 6;
+      return 0;
+   default:
+      fprintf(stderr, "Unknown DRM_IOCTL_LIMA_GET_PARAM %d\n", gp->param);
+      return -1;
+   }
+}
+
+static int
+lima_ioctl_gem_create(int fd, unsigned long request, void *arg)
+{
+   struct drm_lima_gem_create *create = arg;
+
+   struct shim_fd *shim_fd = drm_shim_fd_lookup(fd);
+   struct shim_bo *bo = calloc(1, sizeof(*bo));
+   size_t size = ALIGN(create->size, 4096);
+
+   drm_shim_bo_init(bo, size);
+
+   create->handle = drm_shim_bo_get_handle(shim_fd, bo);
+
+   drm_shim_bo_put(bo);
+
+   return 0;
+}
+
+static int
+lima_ioctl_gem_info(int fd, unsigned long request, void *arg)
+{
+   struct drm_lima_gem_info *gem_info = arg;
+
+   struct shim_fd *shim_fd = drm_shim_fd_lookup(fd);
+   struct shim_bo *bo = drm_shim_bo_lookup(shim_fd, gem_info->handle);
+
+   gem_info->va = bo->mem_addr;
+   gem_info->offset = drm_shim_bo_get_mmap_offset(shim_fd, bo);
+
+   return 0;
+}
+
+static ioctl_fn_t driver_ioctls[] = {
+   [DRM_LIMA_GET_PARAM] = lima_ioctl_get_param,
+   [DRM_LIMA_GEM_CREATE] = lima_ioctl_gem_create,
+   [DRM_LIMA_GEM_INFO] = lima_ioctl_gem_info,
+   [DRM_LIMA_GEM_SUBMIT] = lima_ioctl_noop,
+   [DRM_LIMA_GEM_WAIT] = lima_ioctl_noop,
+   [DRM_LIMA_CTX_CREATE] = lima_ioctl_noop,
+   [DRM_LIMA_CTX_FREE] = lima_ioctl_noop,
+};
+
+void
+drm_shim_driver_init(void)
+{
+   shim_device.bus_type = DRM_BUS_PLATFORM;
+   shim_device.driver_name = "lima";
+   shim_device.driver_ioctls = driver_ioctls;
+   shim_device.driver_ioctl_count = ARRAY_SIZE(driver_ioctls);
+
+   /* lima uses the DRM version to expose features, instead of getparam. */
+   shim_device.version_major = 1;
+   shim_device.version_minor = 1;
+   shim_device.version_patchlevel = 0;
+
+   drm_shim_override_file("DRIVER=lima\n"
+                          "OF_FULLNAME=/soc/mali\n"
+                          "OF_COMPATIBLE_0=arm,mali-450\n"
+                          "OF_COMPATIBLE_N=1\n",
+                          "/sys/dev/char/%d:%d/device/uevent", DRM_MAJOR,
+                          render_node_minor);
+}

src/gallium/drivers/lima/drm-shim/meson.build

@@ -0,0 +1,29 @@
+# Copyright (C) 2021 Icecream95
+#
+# 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.
+
+liblima_noop_drm_shim = shared_library(
+  ['lima_noop_drm_shim'],
+  'lima_noop.c',
+  include_directories: [inc_include, inc_src],
+  dependencies: dep_drm_shim,
+  gnu_symbol_visibility : 'hidden',
+  install : true,
+)

src/gallium/drivers/lima/meson.build

@@ -153,3 +153,7 @@ lima_disasm = executable(
   build_by_default : with_tools.contains('lima'),
   install : with_tools.contains('lima'),
 )
+
+if with_tools.contains('drm-shim')
+  subdir('drm-shim')
+endif