HiKey960: Integrate ARM's reference gralloc for mali bifrost

This integrates the BX304L01B-SW-99005-r4p0-01rel0
mali bifrost package from ARM available here:
 https://developer.arm.com/products/software/mali-drivers/android-gralloc-module

Change-Id: I737bce784d21d1a870229a16bcddd3668738405a
Signed-off-by: John Stultz <john.stultz@linaro.org>

1 files changed, 129 insertions, 0 deletions

diff --git a/gralloc960/gralloc_buffer_priv.cpp b/gralloc960/gralloc_buffer_priv.cpp
new file mode 100644
index 00000000..a3570308
--- /dev/null
+++ b/gralloc960/gralloc_buffer_priv.cpp
@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2014 ARM Limited. All rights reserved.
+ *
+ * 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 <cutils/ashmem.h>
+#include <cutils/log.h>
+#include <sys/mman.h>
+#include "gralloc_priv.h"
+#include "gralloc_buffer_priv.h"
+
+
+/*
+ * Allocate shared memory for attribute storage. Only to be
+ * used by gralloc internally.
+ *
+ * Return 0 on success.
+ */
+int gralloc_buffer_attr_allocate( private_handle_t *hnd )
+{
+	int rval = -1;
+
+	if( !hnd )
+		goto out;
+
+	if( hnd->share_attr_fd >= 0 )
+	{
+		ALOGW("Warning share attribute fd already exists during create. Closing.");
+		close( hnd->share_attr_fd );
+	}
+
+	hnd->share_attr_fd = ashmem_create_region( "gralloc_shared_attr", PAGE_SIZE );
+	if(hnd->share_attr_fd < 0)
+	{
+		ALOGE("Failed to allocate page for shared attribute region");
+		goto err_ashmem;
+	}
+
+	/*
+	 * Default protection on the shm region is PROT_EXEC | PROT_READ | PROT_WRITE.
+	 *
+	 * Personality flag READ_IMPLIES_EXEC which is used by some processes, namely gdbserver,
+	 * causes a mmap with PROT_READ to be translated to PROT_READ | PROT_EXEC.
+	 *
+	 * If we were to drop PROT_EXEC here with a call to ashmem_set_prot_region()
+	 * this can potentially cause clients to fail importing this gralloc attribute buffer
+	 * with EPERM error since PROT_EXEC is not allowed.
+	 *
+	 * Because of this we keep the PROT_EXEC flag.
+	 */
+
+	hnd->attr_base = mmap( NULL, PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, hnd->share_attr_fd, 0 );
+	if(hnd->attr_base != MAP_FAILED)
+	{
+		/* The attribute region contains signed integers only.
+		 * The reason for this is because we can set a value less than 0 for
+		 * not-initialized values.
+		 */
+		attr_region *region = (attr_region *) hnd->attr_base;
+
+		memset(hnd->attr_base, 0xff, PAGE_SIZE);
+		munmap( hnd->attr_base, PAGE_SIZE );
+		hnd->attr_base = MAP_FAILED;
+	}
+	else
+	{
+		ALOGE("Failed to mmap shared attribute region");
+		goto err_ashmem;
+	}
+
+	rval = 0;
+	goto out;
+
+err_ashmem:
+	if( hnd->share_attr_fd >= 0 )
+	{
+		close( hnd->share_attr_fd );
+		hnd->share_attr_fd = -1;
+	}
+
+out:
+	return rval;
+}
+
+/*
+ * Frees the shared memory allocated for attribute storage.
+ * Only to be used by gralloc internally.
+
+ * Return 0 on success.
+ */
+int gralloc_buffer_attr_free( private_handle_t *hnd )
+{
+	int rval = -1;
+
+	if( !hnd )
+		goto out;
+
+	if( hnd->share_attr_fd < 0 )
+	{
+		ALOGE("Shared attribute region not avail to free");
+		goto out;
+	}
+	if( hnd->attr_base != MAP_FAILED )
+	{
+		ALOGW("Warning shared attribute region mapped at free. Unmapping");
+		munmap( hnd->attr_base, PAGE_SIZE );
+		hnd->attr_base = MAP_FAILED;
+	}
+
+	close( hnd->share_attr_fd );
+	hnd->share_attr_fd = -1;
+	rval = 0;
+
+out:
+	return rval;
+}