panfrost: drm-shim support

Reviewed-and-tested-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12431>

src/panfrost/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.
+
+libpanfrost_noop_drm_shim = shared_library(
+  ['panfrost_noop_drm_shim'],
+  'panfrost_noop.c',
+  include_directories: [inc_include, inc_src],
+  dependencies: dep_drm_shim,
+  gnu_symbol_visibility : 'hidden',
+  install : true,
+)

src/panfrost/drm-shim/panfrost_noop.c

@@ -0,0 +1,146 @@
+/*
+ * 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/panfrost_drm.h"
+
+#include "util/u_math.h"
+
+bool drm_shim_driver_prefers_first_render_node = true;
+
+static int
+pan_ioctl_noop(int fd, unsigned long request, void *arg)
+{
+   return 0;
+}
+
+static int
+pan_ioctl_get_param(int fd, unsigned long request, void *arg)
+{
+   struct drm_panfrost_get_param *gp = arg;
+
+   switch (gp->param) {
+   case DRM_PANFROST_PARAM_GPU_PROD_ID:
+      /* Other GPUs can be set using PAN_GPU_ID */
+      gp->value = 0x860;
+      return 0;
+   case DRM_PANFROST_PARAM_GPU_REVISION:
+      gp->value = 0;
+      return 0;
+   case DRM_PANFROST_PARAM_SHADER_PRESENT:
+      /* Assume an MP4 GPU */
+      gp->value = 0xF;
+      return 0;
+   case DRM_PANFROST_PARAM_TEXTURE_FEATURES0:
+      gp->value = 0;
+      return 0;
+   case DRM_PANFROST_PARAM_THREAD_TLS_ALLOC:
+      gp->value = 0;
+      return 0;
+   case DRM_PANFROST_PARAM_TILER_FEATURES:
+      gp->value = 0x809;
+      return 0;
+   default:
+      fprintf(stderr, "Unknown DRM_IOCTL_PANFROST_GET_PARAM %d\n", gp->param);
+      return -1;
+   }
+}
+
+static int
+pan_ioctl_create_bo(int fd, unsigned long request, void *arg)
+{
+   struct drm_panfrost_create_bo *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);
+   create->offset = bo->mem_addr;
+
+   drm_shim_bo_put(bo);
+
+   return 0;
+}
+
+static int
+pan_ioctl_mmap_bo(int fd, unsigned long request, void *arg)
+{
+   struct drm_panfrost_mmap_bo *mmap_bo = arg;
+
+   struct shim_fd *shim_fd = drm_shim_fd_lookup(fd);
+   struct shim_bo *bo = drm_shim_bo_lookup(shim_fd, mmap_bo->handle);
+
+   mmap_bo->offset = drm_shim_bo_get_mmap_offset(shim_fd, bo);
+
+   return 0;
+}
+
+static int
+pan_ioctl_madvise(int fd, unsigned long request, void *arg)
+{
+   struct drm_panfrost_madvise *madvise = arg;
+
+   madvise->retained = 1;
+
+   return 0;
+}
+
+static ioctl_fn_t driver_ioctls[] = {
+   [DRM_PANFROST_SUBMIT] = pan_ioctl_noop,
+   [DRM_PANFROST_WAIT_BO] = pan_ioctl_noop,
+   [DRM_PANFROST_CREATE_BO] = pan_ioctl_create_bo,
+   [DRM_PANFROST_MMAP_BO] = pan_ioctl_mmap_bo,
+   [DRM_PANFROST_GET_PARAM] = pan_ioctl_get_param,
+   [DRM_PANFROST_GET_BO_OFFSET] = pan_ioctl_noop,
+   [DRM_PANFROST_PERFCNT_ENABLE] = pan_ioctl_noop,
+   [DRM_PANFROST_PERFCNT_DUMP] = pan_ioctl_noop,
+   [DRM_PANFROST_MADVISE] = pan_ioctl_madvise,
+};
+
+void
+drm_shim_driver_init(void)
+{
+   shim_device.bus_type = DRM_BUS_PLATFORM;
+   shim_device.driver_name = "panfrost";
+   shim_device.driver_ioctls = driver_ioctls;
+   shim_device.driver_ioctl_count = ARRAY_SIZE(driver_ioctls);
+
+   /* panfrost 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=panfrost\n"
+                          "OF_FULLNAME=/soc/mali\n"
+                          "OF_COMPATIBLE_0=arm,mali-t860\n"
+                          "OF_COMPATIBLE_N=1\n",
+                          "/sys/dev/char/%d:%d/device/uevent", DRM_MAJOR,
+                          render_node_minor);
+}

src/panfrost/meson.build

@@ -74,3 +74,7 @@ endif
 if with_perfetto and (with_datasources.contains('panfrost') or with_datasources.contains('auto'))
   subdir('ds')
 endif
+
+if with_tools.contains('drm-shim')
+  subdir('drm-shim')
+endif