Move gralloc from vendor to here

Change-Id: I47bca624cfcbeaeb67321e17a2f755785da16aa5
Signed-off-by: Rebecca Schultz Zavin <rebecca@android.com>

1 files changed, 149 insertions, 0 deletions

diff --git a/gralloc/mapper.cpp b/gralloc/mapper.cpp
new file mode 100644
index 0000000..1f5cf8f
--- /dev/null
+++ b/gralloc/mapper.cpp
@@ -0,0 +1,149 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <limits.h>
+#include <errno.h>
+#include <pthread.h>
+#include <unistd.h>
+#include <string.h>
+
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include <cutils/log.h>
+#include <cutils/atomic.h>
+
+#include <hardware/hardware.h>
+#include <hardware/gralloc.h>
+
+#include "gralloc_priv.h"
+
+#include <ion/ion.h>
+#include <linux/ion.h>
+
+/*****************************************************************************/
+
+static int gralloc_map(gralloc_module_t const* module, buffer_handle_t handle)
+{
+    private_handle_t* hnd = (private_handle_t*)handle;
+
+    void* mappedAddress = mmap(0, hnd->size, PROT_READ|PROT_WRITE, MAP_SHARED, 
+                               hnd->fd, 0);
+    if (mappedAddress == MAP_FAILED) {
+        ALOGE("%s: could not mmap %s", __func__, strerror(errno));
+        return -errno;
+    }
+    ALOGV("%s: base %p %d %d %d %d\n", __func__, mappedAddress, hnd->size,
+          hnd->width, hnd->height, hnd->stride);
+    hnd->base = mappedAddress;
+    return 0;
+}
+
+static int gralloc_unmap(gralloc_module_t const* module, buffer_handle_t handle)
+{
+    private_handle_t* hnd = (private_handle_t*)handle;
+
+    if (!hnd->base)
+        return 0;
+
+    if (munmap(hnd->base, hnd->size) < 0) {
+        ALOGE("%s :could not unmap %s %p %d", __func__, strerror(errno),
+              hnd->base, hnd->size);
+    }
+    ALOGV("%s: base %p %d %d %d %d\n", __func__, hnd->base, hnd->size,
+          hnd->width, hnd->height, hnd->stride);
+    hnd->base = 0;
+    return 0;
+}
+
+/*****************************************************************************/
+
+int grallocMap(gralloc_module_t const* module, private_handle_t *hnd)
+{
+    return gralloc_map(module, hnd);
+}
+
+int grallocUnmap(gralloc_module_t const* module, private_handle_t *hnd)	
+{
+    return gralloc_unmap(module, hnd);
+}
+
+static pthread_mutex_t sMapLock = PTHREAD_MUTEX_INITIALIZER; 
+
+/*****************************************************************************/
+
+int gralloc_register_buffer(gralloc_module_t const* module,
+                            buffer_handle_t handle)
+{
+    int err;
+    if (private_handle_t::validate(handle) < 0)
+        return -EINVAL;
+
+    err = gralloc_map(module, handle);
+
+    private_handle_t* hnd = (private_handle_t*)handle;
+    ALOGV("%s: base %p %d %d %d %d\n", __func__, hnd->base, hnd->size,
+          hnd->width, hnd->height, hnd->stride);
+    return err;
+}
+
+int gralloc_unregister_buffer(gralloc_module_t const* module,
+                              buffer_handle_t handle)
+{
+    if (private_handle_t::validate(handle) < 0)
+        return -EINVAL;
+
+    private_handle_t* hnd = (private_handle_t*)handle;
+    ALOGV("%s: base %p %d %d %d %d\n", __func__, hnd->base, hnd->size,
+          hnd->width, hnd->height, hnd->stride);
+
+    gralloc_unmap(module, handle);
+
+    return 0;
+}
+
+int gralloc_lock(gralloc_module_t const* module,
+                 buffer_handle_t handle, int usage,
+                 int l, int t, int w, int h,
+                 void** vaddr)
+{
+    // this is called when a buffer is being locked for software
+    // access. in thin implementation we have nothing to do since
+    // not synchronization with the h/w is needed.
+    // typically this is used to wait for the h/w to finish with
+    // this buffer if relevant. the data cache may need to be
+    // flushed or invalidated depending on the usage bits and the
+    // hardware.
+
+    if (private_handle_t::validate(handle) < 0)
+        return -EINVAL;
+
+    private_handle_t* hnd = (private_handle_t*)handle;
+    *vaddr = (void*)hnd->base;
+    return 0;
+}
+
+int gralloc_unlock(gralloc_module_t const* module, 
+                   buffer_handle_t handle)
+{
+    // we're done with a software buffer. nothing to do in this
+    // implementation. typically this is used to flush the data cache.
+
+    if (private_handle_t::validate(handle) < 0)
+        return -EINVAL;
+    return 0;
+}