virgl: add virgl_context

It will be the base class for contexts of renderers.

Signed-off-by: Chia-I Wu <olvaffe@gmail.com>
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>

src/Makefile.am

@@ -19,6 +19,8 @@ AM_CFLAGS = \
 	$(CODE_COVERAGE_CFLAGS)
 
 libvrend_la_SOURCES = \
+        virgl_context.c \
+        virgl_context.h \
         virgl_hw.h \
         virgl_protocol.h \
         virgl_util.c \

src/meson.build

@@ -25,6 +25,8 @@ subdir('gallium')
 
 virgl_sources = [
    'iov.c',
+   'virgl_context.c',
+   'virgl_context.h',
    'virgl_hw.h',
    'virgl_protocol.h',
    'virgl_util.c',

src/virgl_context.c

@@ -0,0 +1,85 @@
+/**************************************************************************
+ *
+ * Copyright (C) 2020 Chromium.
+ *
+ * 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 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 "virgl_context.h"
+
+#include <errno.h>
+
+#include "util/u_hash_table.h"
+#include "util/u_pointer.h"
+#include "virgl_util.h"
+
+static struct util_hash_table *virgl_context_table;
+
+static void
+virgl_context_destroy_func(void *val)
+{
+   struct virgl_context *ctx = val;
+   ctx->destroy(ctx);
+}
+
+int
+virgl_context_table_init(void)
+{
+   virgl_context_table = util_hash_table_create(hash_func_u32,
+                                                compare_func,
+                                                virgl_context_destroy_func);
+   return virgl_context_table ? 0 : ENOMEM;
+}
+
+void
+virgl_context_table_cleanup(void)
+{
+   if (virgl_context_table) {
+      util_hash_table_destroy(virgl_context_table);
+      virgl_context_table = NULL;
+   }
+}
+
+void
+virgl_context_table_reset(void)
+{
+   util_hash_table_clear(virgl_context_table);
+}
+
+int
+virgl_context_add(struct virgl_context *ctx)
+{
+   const enum pipe_error err = util_hash_table_set(
+         virgl_context_table, uintptr_to_pointer(ctx->ctx_id), ctx);
+   return err == PIPE_OK ? 0 : ENOMEM;
+}
+
+void
+virgl_context_remove(uint32_t ctx_id)
+{
+   util_hash_table_remove(virgl_context_table, uintptr_to_pointer(ctx_id));
+}
+
+struct virgl_context *
+virgl_context_lookup(uint32_t ctx_id)
+{
+   return util_hash_table_get(virgl_context_table,
+                              uintptr_to_pointer(ctx_id));
+}

src/virgl_context.h

@@ -0,0 +1,54 @@
+/**************************************************************************
+ *
+ * Copyright (C) 2020 Chromium.
+ *
+ * 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 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.
+ *
+ **************************************************************************/
+
+#ifndef VIRGL_CONTEXT_H
+#define VIRGL_CONTEXT_H
+
+#include <stdint.h>
+
+struct virgl_context {
+   uint32_t ctx_id;
+
+   void (*destroy)(struct virgl_context *ctx);
+};
+
+int
+virgl_context_table_init(void);
+
+void
+virgl_context_table_cleanup(void);
+
+void
+virgl_context_table_reset(void);
+
+int
+virgl_context_add(struct virgl_context *ctx);
+
+void
+virgl_context_remove(uint32_t ctx_id);
+
+struct virgl_context *
+virgl_context_lookup(uint32_t ctx_id);
+
+#endif /* VIRGL_CONTEXT_H */

src/virglrenderer.c

@@ -38,6 +38,8 @@
 
 #include "virglrenderer.h"
 
+#include "virgl_context.h"
+
 #ifdef HAVE_EPOXY_EGL_H
 #include "virgl_gbm.h"
 #include "virgl_egl.h"
@@ -291,6 +293,8 @@ void virgl_renderer_poll(void)
 void virgl_renderer_cleanup(UNUSED void *cookie)
 {
    vrend_renderer_fini();
+   virgl_context_table_cleanup();
+
 #ifdef HAVE_EPOXY_EGL_H
    if (use_context == CONTEXT_EGL) {
       virgl_egl_destroy(egl);
@@ -366,6 +370,9 @@ int virgl_renderer_init(void *cookie, int flags, struct virgl_renderer_callbacks
 #endif
    }
 
+   if (virgl_context_table_init())
+      return -1;
+
    if (flags & VIRGL_RENDERER_THREAD_SYNC)
       renderer_flags |= VREND_USE_THREAD_SYNC;