goldfish: get a default gralloc
Right now, the default gralloc is at hardware/libhardware
and it is used by emulator and other vendors (maybe during
some hardware bringup)
Having our own gralloc for -gpu guest will make working on
-gpu guest bugs faster (we own goldfish project) and safer
(as it only impacts emulator)
note: the number of framebuffer is changed from 2 to 1
Change-Id: Ic4620fb579769793b406d87a364548a5af5aa45a
diff --git a/gralloc/Android.mk b/gralloc/Android.mk
new file mode 100644
index 0000000..a837f0a
--- /dev/null
+++ b/gralloc/Android.mk
@@ -0,0 +1,39 @@
+# 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.
+
+
+LOCAL_PATH := $(call my-dir)
+
+# HAL module implemenation stored in
+# hw/<OVERLAY_HARDWARE_MODULE_ID>.<ro.product.board>.so
+include $(CLEAR_VARS)
+
+LOCAL_MODULE_RELATIVE_PATH := hw
+LOCAL_PROPRIETARY_MODULE := true
+LOCAL_SHARED_LIBRARIES := liblog libcutils
+
+LOCAL_SRC_FILES := \
+ gralloc.cpp \
+ framebuffer.cpp \
+ mapper.cpp
+
+LOCAL_HEADER_LIBRARIES := libhardware_headers
+
+LOCAL_MODULE := gralloc.goldfish.default
+LOCAL_CFLAGS:= -DLOG_TAG=\"gralloc\" -Wno-missing-field-initializers
+ifeq ($(TARGET_USE_PAN_DISPLAY),true)
+LOCAL_CFLAGS += -DUSE_PAN_DISPLAY=1
+endif
+
+include $(BUILD_SHARED_LIBRARY)
diff --git a/gralloc/framebuffer.cpp b/gralloc/framebuffer.cpp
new file mode 100644
index 0000000..34c0225
--- /dev/null
+++ b/gralloc/framebuffer.cpp
@@ -0,0 +1,357 @@
+/*
+ * 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 <dlfcn.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+
+#include <cutils/ashmem.h>
+#include <cutils/atomic.h>
+#include <log/log.h>
+
+#include <hardware/gralloc.h>
+#include <hardware/hardware.h>
+
+#ifdef __ANDROID__
+#include <linux/fb.h>
+#endif
+
+#include "gralloc_priv.h"
+#include "gr.h"
+
+/*****************************************************************************/
+
+// Set TARGET_USE_PAN_DISPLAY to true at compile time if the
+// board uses FBIOPAN_DISPLAY to setup page flipping, otherwise
+// default ioctl to do page-flipping is FBIOPUT_VSCREENINFO.
+#ifndef USE_PAN_DISPLAY
+#define USE_PAN_DISPLAY 0
+#endif
+
+// numbers of buffers for page flipping
+#define NUM_BUFFERS 1
+
+
+enum {
+ PAGE_FLIP = 0x00000001,
+ LOCKED = 0x00000002
+};
+
+struct fb_context_t {
+ framebuffer_device_t device;
+};
+
+/*****************************************************************************/
+
+static int fb_setSwapInterval(struct framebuffer_device_t* dev,
+ int interval)
+{
+ fb_context_t* ctx = (fb_context_t*)dev;
+ if (interval < dev->minSwapInterval || interval > dev->maxSwapInterval)
+ return -EINVAL;
+ // FIXME: implement fb_setSwapInterval
+ return 0;
+}
+
+static int fb_setUpdateRect(struct framebuffer_device_t* dev,
+ int l, int t, int w, int h)
+{
+ if (((w|h) <= 0) || ((l|t)<0))
+ return -EINVAL;
+
+ fb_context_t* ctx = (fb_context_t*)dev;
+ private_module_t* m = reinterpret_cast<private_module_t*>(
+ dev->common.module);
+ m->info.reserved[0] = 0x54445055; // "UPDT";
+ m->info.reserved[1] = (uint16_t)l | ((uint32_t)t << 16);
+ m->info.reserved[2] = (uint16_t)(l+w) | ((uint32_t)(t+h) << 16);
+ return 0;
+}
+
+static int fb_post(struct framebuffer_device_t* dev, buffer_handle_t buffer)
+{
+ if (private_handle_t::validate(buffer) < 0)
+ return -EINVAL;
+
+ fb_context_t* ctx = (fb_context_t*)dev;
+
+ private_handle_t const* hnd = reinterpret_cast<private_handle_t const*>(buffer);
+ private_module_t* m = reinterpret_cast<private_module_t*>(
+ dev->common.module);
+
+ if (hnd->flags & private_handle_t::PRIV_FLAGS_FRAMEBUFFER) {
+ const size_t offset = hnd->base - m->framebuffer->base;
+ m->info.activate = FB_ACTIVATE_VBL;
+ m->info.yoffset = offset / m->finfo.line_length;
+ if (ioctl(m->framebuffer->fd, FBIOPUT_VSCREENINFO, &m->info) == -1) {
+ ALOGE("FBIOPUT_VSCREENINFO failed");
+ m->base.unlock(&m->base, buffer);
+ return -errno;
+ }
+ m->currentBuffer = buffer;
+
+ } else {
+ // If we can't do the page_flip, just copy the buffer to the front
+ // FIXME: use copybit HAL instead of memcpy
+
+ void* fb_vaddr;
+ void* buffer_vaddr;
+
+ m->base.lock(&m->base, m->framebuffer,
+ GRALLOC_USAGE_SW_WRITE_RARELY,
+ 0, 0, m->info.xres, m->info.yres,
+ &fb_vaddr);
+
+ m->base.lock(&m->base, buffer,
+ GRALLOC_USAGE_SW_READ_RARELY,
+ 0, 0, m->info.xres, m->info.yres,
+ &buffer_vaddr);
+
+ memcpy(fb_vaddr, buffer_vaddr, m->finfo.line_length * m->info.yres);
+
+ m->base.unlock(&m->base, buffer);
+ m->base.unlock(&m->base, m->framebuffer);
+ }
+
+ return 0;
+}
+
+/*****************************************************************************/
+
+int mapFrameBufferLocked(struct private_module_t* module)
+{
+ // already initialized...
+ if (module->framebuffer) {
+ return 0;
+ }
+
+ char const * const device_template[] = {
+ "/dev/graphics/fb%u",
+ "/dev/fb%u",
+ 0 };
+
+ int fd = -1;
+ int i=0;
+ char name[64];
+
+ while ((fd==-1) && device_template[i]) {
+ snprintf(name, 64, device_template[i], 0);
+ fd = open(name, O_RDWR, 0);
+ i++;
+ }
+ if (fd < 0)
+ return -errno;
+
+ struct fb_fix_screeninfo finfo;
+ if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1)
+ return -errno;
+
+ struct fb_var_screeninfo info;
+ if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1)
+ return -errno;
+
+ info.reserved[0] = 0;
+ info.reserved[1] = 0;
+ info.reserved[2] = 0;
+ info.xoffset = 0;
+ info.yoffset = 0;
+ info.activate = FB_ACTIVATE_NOW;
+
+ /*
+ * Request NUM_BUFFERS screens (at lest 2 for page flipping)
+ */
+ info.yres_virtual = info.yres * NUM_BUFFERS;
+
+
+ uint32_t flags = PAGE_FLIP;
+#if USE_PAN_DISPLAY
+ if (ioctl(fd, FBIOPAN_DISPLAY, &info) == -1) {
+ ALOGW("FBIOPAN_DISPLAY failed, page flipping not supported");
+#else
+ if (ioctl(fd, FBIOPUT_VSCREENINFO, &info) == -1) {
+ ALOGW("FBIOPUT_VSCREENINFO failed, page flipping not supported");
+#endif
+ info.yres_virtual = info.yres;
+ flags &= ~PAGE_FLIP;
+ }
+
+ if (info.yres_virtual < info.yres * 2) {
+ // we need at least 2 for page-flipping
+ info.yres_virtual = info.yres;
+ flags &= ~PAGE_FLIP;
+ ALOGW("page flipping not supported (yres_virtual=%d, requested=%d)",
+ info.yres_virtual, info.yres*2);
+ }
+
+ if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1)
+ return -errno;
+
+ uint64_t refreshQuotient =
+ (
+ uint64_t( info.upper_margin + info.lower_margin + info.yres )
+ * ( info.left_margin + info.right_margin + info.xres )
+ * info.pixclock
+ );
+
+ /* Beware, info.pixclock might be 0 under emulation, so avoid a
+ * division-by-0 here (SIGFPE on ARM) */
+ int refreshRate = refreshQuotient > 0 ? (int)(1000000000000000LLU / refreshQuotient) : 0;
+
+ if (refreshRate == 0) {
+ // bleagh, bad info from the driver
+ refreshRate = 60*1000; // 60 Hz
+ }
+
+ if (int(info.width) <= 0 || int(info.height) <= 0) {
+ // the driver doesn't return that information
+ // default to 160 dpi
+ info.width = ((info.xres * 25.4f)/160.0f + 0.5f);
+ info.height = ((info.yres * 25.4f)/160.0f + 0.5f);
+ }
+
+ float xdpi = (info.xres * 25.4f) / info.width;
+ float ydpi = (info.yres * 25.4f) / info.height;
+ float fps = refreshRate / 1000.0f;
+
+ ALOGI( "using (fd=%d)\n"
+ "id = %s\n"
+ "xres = %d px\n"
+ "yres = %d px\n"
+ "xres_virtual = %d px\n"
+ "yres_virtual = %d px\n"
+ "bpp = %d\n"
+ "r = %2u:%u\n"
+ "g = %2u:%u\n"
+ "b = %2u:%u\n",
+ fd,
+ finfo.id,
+ info.xres,
+ info.yres,
+ info.xres_virtual,
+ info.yres_virtual,
+ info.bits_per_pixel,
+ info.red.offset, info.red.length,
+ info.green.offset, info.green.length,
+ info.blue.offset, info.blue.length
+ );
+
+ ALOGI( "width = %d mm (%f dpi)\n"
+ "height = %d mm (%f dpi)\n"
+ "refresh rate = %.2f Hz\n",
+ info.width, xdpi,
+ info.height, ydpi,
+ fps
+ );
+
+
+ if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1)
+ return -errno;
+
+ if (finfo.smem_len <= 0)
+ return -errno;
+
+
+ module->flags = flags;
+ module->info = info;
+ module->finfo = finfo;
+ module->xdpi = xdpi;
+ module->ydpi = ydpi;
+ module->fps = fps;
+
+ /*
+ * map the framebuffer
+ */
+
+ int err;
+ size_t fbSize = roundUpToPageSize(finfo.line_length * info.yres_virtual);
+ module->framebuffer = new private_handle_t(dup(fd), fbSize, 0);
+
+ module->numBuffers = info.yres_virtual / info.yres;
+ module->bufferMask = 0;
+
+ void* vaddr = mmap(0, fbSize, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
+ if (vaddr == MAP_FAILED) {
+ ALOGE("Error mapping the framebuffer (%s)", strerror(errno));
+ return -errno;
+ }
+ module->framebuffer->base = intptr_t(vaddr);
+ memset(vaddr, 0, fbSize);
+ return 0;
+}
+
+static int mapFrameBuffer(struct private_module_t* module)
+{
+ pthread_mutex_lock(&module->lock);
+ int err = mapFrameBufferLocked(module);
+ pthread_mutex_unlock(&module->lock);
+ return err;
+}
+
+/*****************************************************************************/
+
+static int fb_close(struct hw_device_t *dev)
+{
+ fb_context_t* ctx = (fb_context_t*)dev;
+ if (ctx) {
+ free(ctx);
+ }
+ return 0;
+}
+
+int fb_device_open(hw_module_t const* module, const char* name,
+ hw_device_t** device)
+{
+ int status = -EINVAL;
+ if (!strcmp(name, GRALLOC_HARDWARE_FB0)) {
+ /* initialize our state here */
+ fb_context_t *dev = (fb_context_t*)malloc(sizeof(*dev));
+ memset(dev, 0, sizeof(*dev));
+
+ /* initialize the procs */
+ dev->device.common.tag = HARDWARE_DEVICE_TAG;
+ dev->device.common.version = 0;
+ dev->device.common.module = const_cast<hw_module_t*>(module);
+ dev->device.common.close = fb_close;
+ dev->device.setSwapInterval = fb_setSwapInterval;
+ dev->device.post = fb_post;
+ dev->device.setUpdateRect = 0;
+
+ private_module_t* m = (private_module_t*)module;
+ status = mapFrameBuffer(m);
+ if (status >= 0) {
+ int stride = m->finfo.line_length / (m->info.bits_per_pixel >> 3);
+ int format = (m->info.bits_per_pixel == 32)
+ ? (m->info.red.offset ? HAL_PIXEL_FORMAT_BGRA_8888 : HAL_PIXEL_FORMAT_RGBX_8888)
+ : HAL_PIXEL_FORMAT_RGB_565;
+ const_cast<uint32_t&>(dev->device.flags) = 0;
+ const_cast<uint32_t&>(dev->device.width) = m->info.xres;
+ const_cast<uint32_t&>(dev->device.height) = m->info.yres;
+ const_cast<int&>(dev->device.stride) = stride;
+ const_cast<int&>(dev->device.format) = format;
+ const_cast<float&>(dev->device.xdpi) = m->xdpi;
+ const_cast<float&>(dev->device.ydpi) = m->ydpi;
+ const_cast<float&>(dev->device.fps) = m->fps;
+ const_cast<int&>(dev->device.minSwapInterval) = 1;
+ const_cast<int&>(dev->device.maxSwapInterval) = 1;
+ *device = &dev->device.common;
+ }
+ }
+ return status;
+}
diff --git a/gralloc/gr.h b/gralloc/gr.h
new file mode 100644
index 0000000..ac7e967
--- /dev/null
+++ b/gralloc/gr.h
@@ -0,0 +1,60 @@
+/*
+ * 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.
+ */
+
+#ifndef GR_H_
+#define GR_H_
+
+#include <stdint.h>
+#include <sys/user.h>
+#include <limits.h>
+#include <sys/cdefs.h>
+#include <hardware/gralloc.h>
+#include <pthread.h>
+#include <errno.h>
+
+#include <cutils/native_handle.h>
+
+/*****************************************************************************/
+
+struct private_module_t;
+struct private_handle_t;
+
+inline size_t roundUpToPageSize(size_t x) {
+ return (x + (PAGE_SIZE-1)) & ~(PAGE_SIZE-1);
+}
+
+int mapFrameBufferLocked(struct private_module_t* module);
+int terminateBuffer(gralloc_module_t const* module, private_handle_t* hnd);
+int mapBuffer(gralloc_module_t const* module, private_handle_t* hnd);
+
+/*****************************************************************************/
+
+class Locker {
+ pthread_mutex_t mutex;
+public:
+ class Autolock {
+ Locker& locker;
+ public:
+ inline explicit Autolock(Locker& locker) : locker(locker) { locker.lock(); }
+ inline ~Autolock() { locker.unlock(); }
+ };
+ inline Locker() { pthread_mutex_init(&mutex, 0); }
+ inline ~Locker() { pthread_mutex_destroy(&mutex); }
+ inline void lock() { pthread_mutex_lock(&mutex); }
+ inline void unlock() { pthread_mutex_unlock(&mutex); }
+};
+
+#endif /* GR_H_ */
diff --git a/gralloc/gralloc.cpp b/gralloc/gralloc.cpp
new file mode 100644
index 0000000..07bbfba
--- /dev/null
+++ b/gralloc/gralloc.cpp
@@ -0,0 +1,317 @@
+/*
+ * 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 <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <pthread.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <cutils/ashmem.h>
+#include <cutils/atomic.h>
+#include <log/log.h>
+
+#include <hardware/gralloc.h>
+#include <hardware/hardware.h>
+
+#include "gralloc_priv.h"
+#include "gr.h"
+
+/*****************************************************************************/
+
+struct gralloc_context_t {
+ alloc_device_t device;
+ /* our private data here */
+};
+
+static int gralloc_alloc_buffer(alloc_device_t* dev,
+ size_t size, int usage, buffer_handle_t* pHandle);
+
+/*****************************************************************************/
+
+int fb_device_open(const hw_module_t* module, const char* name,
+ hw_device_t** device);
+
+static int gralloc_device_open(const hw_module_t* module, const char* name,
+ hw_device_t** device);
+
+extern int gralloc_lock(gralloc_module_t const* module,
+ buffer_handle_t handle, int usage,
+ int l, int t, int w, int h,
+ void** vaddr);
+
+extern int gralloc_unlock(gralloc_module_t const* module,
+ buffer_handle_t handle);
+
+extern int gralloc_register_buffer(gralloc_module_t const* module,
+ buffer_handle_t handle);
+
+extern int gralloc_unregister_buffer(gralloc_module_t const* module,
+ buffer_handle_t handle);
+
+/*****************************************************************************/
+
+static struct hw_module_methods_t gralloc_module_methods = {
+ .open = gralloc_device_open
+};
+
+struct private_module_t HAL_MODULE_INFO_SYM = {
+ .base = {
+ .common = {
+ .tag = HARDWARE_MODULE_TAG,
+ .version_major = 1,
+ .version_minor = 0,
+ .id = GRALLOC_HARDWARE_MODULE_ID,
+ .name = "Graphics Memory Allocator Module",
+ .author = "The Android Open Source Project",
+ .methods = &gralloc_module_methods
+ },
+ .registerBuffer = gralloc_register_buffer,
+ .unregisterBuffer = gralloc_unregister_buffer,
+ .lock = gralloc_lock,
+ .unlock = gralloc_unlock,
+ },
+ .framebuffer = 0,
+ .flags = 0,
+ .numBuffers = 0,
+ .bufferMask = 0,
+ .lock = PTHREAD_MUTEX_INITIALIZER,
+ .currentBuffer = 0,
+};
+
+/*****************************************************************************/
+
+static int gralloc_alloc_framebuffer_locked(alloc_device_t* dev,
+ size_t size, int usage, buffer_handle_t* pHandle)
+{
+ private_module_t* m = reinterpret_cast<private_module_t*>(
+ dev->common.module);
+
+ // allocate the framebuffer
+ if (m->framebuffer == NULL) {
+ // initialize the framebuffer, the framebuffer is mapped once
+ // and forever.
+ int err = mapFrameBufferLocked(m);
+ if (err < 0) {
+ return err;
+ }
+ }
+
+ const uint32_t bufferMask = m->bufferMask;
+ const uint32_t numBuffers = m->numBuffers;
+ const size_t bufferSize = m->finfo.line_length * m->info.yres;
+ if (numBuffers == 1) {
+ // If we have only one buffer, we never use page-flipping. Instead,
+ // we return a regular buffer which will be memcpy'ed to the main
+ // screen when post is called.
+ int newUsage = (usage & ~GRALLOC_USAGE_HW_FB) | GRALLOC_USAGE_HW_2D;
+ return gralloc_alloc_buffer(dev, bufferSize, newUsage, pHandle);
+ }
+
+ if (bufferMask >= ((1LU<<numBuffers)-1)) {
+ // We ran out of buffers.
+ return -ENOMEM;
+ }
+
+ // create a "fake" handles for it
+ intptr_t vaddr = intptr_t(m->framebuffer->base);
+ private_handle_t* hnd = new private_handle_t(dup(m->framebuffer->fd), size,
+ private_handle_t::PRIV_FLAGS_FRAMEBUFFER);
+
+ // find a free slot
+ for (uint32_t i=0 ; i<numBuffers ; i++) {
+ if ((bufferMask & (1LU<<i)) == 0) {
+ m->bufferMask |= (1LU<<i);
+ break;
+ }
+ vaddr += bufferSize;
+ }
+
+ hnd->base = vaddr;
+ hnd->offset = vaddr - intptr_t(m->framebuffer->base);
+ *pHandle = hnd;
+
+ return 0;
+}
+
+static int gralloc_alloc_framebuffer(alloc_device_t* dev,
+ size_t size, int usage, buffer_handle_t* pHandle)
+{
+ private_module_t* m = reinterpret_cast<private_module_t*>(
+ dev->common.module);
+ pthread_mutex_lock(&m->lock);
+ int err = gralloc_alloc_framebuffer_locked(dev, size, usage, pHandle);
+ pthread_mutex_unlock(&m->lock);
+ return err;
+}
+
+static int gralloc_alloc_buffer(alloc_device_t* dev,
+ size_t size, int /*usage*/, buffer_handle_t* pHandle)
+{
+ int err = 0;
+ int fd = -1;
+
+ size = roundUpToPageSize(size);
+
+ fd = ashmem_create_region("gralloc-buffer", size);
+ if (fd < 0) {
+ ALOGE("couldn't create ashmem (%s)", strerror(-errno));
+ err = -errno;
+ }
+
+ if (err == 0) {
+ private_handle_t* hnd = new private_handle_t(fd, size, 0);
+ gralloc_module_t* module = reinterpret_cast<gralloc_module_t*>(
+ dev->common.module);
+ err = mapBuffer(module, hnd);
+ if (err == 0) {
+ *pHandle = hnd;
+ }
+ }
+
+ ALOGE_IF(err, "gralloc failed err=%s", strerror(-err));
+
+ return err;
+}
+
+/*****************************************************************************/
+
+inline size_t align(size_t value, size_t alignment)
+{
+ return ((value + alignment - 1) / alignment) * alignment;
+}
+
+static int gralloc_alloc(alloc_device_t* dev,
+ int width, int height, int format, int usage,
+ buffer_handle_t* pHandle, int* pStride)
+{
+ if (!pHandle || !pStride)
+ return -EINVAL;
+
+ int bytesPerPixel = 0;
+ switch (format) {
+ case HAL_PIXEL_FORMAT_RGBA_FP16:
+ bytesPerPixel = 8;
+ break;
+ case HAL_PIXEL_FORMAT_RGBA_8888:
+ case HAL_PIXEL_FORMAT_RGBX_8888:
+ case HAL_PIXEL_FORMAT_BGRA_8888:
+ bytesPerPixel = 4;
+ break;
+ case HAL_PIXEL_FORMAT_RGB_888:
+ bytesPerPixel = 3;
+ break;
+ case HAL_PIXEL_FORMAT_RGB_565:
+ case HAL_PIXEL_FORMAT_RAW16:
+ bytesPerPixel = 2;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ const size_t tileWidth = 2;
+ const size_t tileHeight = 2;
+
+ size_t stride = align(width, tileWidth);
+ size_t size = align(height, tileHeight) * stride * bytesPerPixel + 4;
+
+ int err;
+ if (usage & GRALLOC_USAGE_HW_FB) {
+ err = gralloc_alloc_framebuffer(dev, size, usage, pHandle);
+ } else {
+ err = gralloc_alloc_buffer(dev, size, usage, pHandle);
+ }
+
+ if (err < 0) {
+ return err;
+ }
+
+ *pStride = stride;
+ return 0;
+}
+
+static int gralloc_free(alloc_device_t* dev,
+ buffer_handle_t handle)
+{
+ if (private_handle_t::validate(handle) < 0)
+ return -EINVAL;
+
+ private_handle_t const* hnd = reinterpret_cast<private_handle_t const*>(handle);
+ if (hnd->flags & private_handle_t::PRIV_FLAGS_FRAMEBUFFER) {
+ // free this buffer
+ private_module_t* m = reinterpret_cast<private_module_t*>(
+ dev->common.module);
+ const size_t bufferSize = m->finfo.line_length * m->info.yres;
+ int index = (hnd->base - m->framebuffer->base) / bufferSize;
+ m->bufferMask &= ~(1<<index);
+ } else {
+ gralloc_module_t* module = reinterpret_cast<gralloc_module_t*>(
+ dev->common.module);
+ terminateBuffer(module, const_cast<private_handle_t*>(hnd));
+ }
+
+ close(hnd->fd);
+ delete hnd;
+ return 0;
+}
+
+/*****************************************************************************/
+
+static int gralloc_close(struct hw_device_t *dev)
+{
+ gralloc_context_t* ctx = reinterpret_cast<gralloc_context_t*>(dev);
+ if (ctx) {
+ /* TODO: keep a list of all buffer_handle_t created, and free them
+ * all here.
+ */
+ free(ctx);
+ }
+ return 0;
+}
+
+int gralloc_device_open(const hw_module_t* module, const char* name,
+ hw_device_t** device)
+{
+ int status = -EINVAL;
+ if (!strcmp(name, GRALLOC_HARDWARE_GPU0)) {
+ gralloc_context_t *dev;
+ dev = (gralloc_context_t*)malloc(sizeof(*dev));
+
+ /* initialize our state here */
+ memset(dev, 0, sizeof(*dev));
+
+ /* initialize the procs */
+ dev->device.common.tag = HARDWARE_DEVICE_TAG;
+ dev->device.common.version = 0;
+ dev->device.common.module = const_cast<hw_module_t*>(module);
+ dev->device.common.close = gralloc_close;
+
+ dev->device.alloc = gralloc_alloc;
+ dev->device.free = gralloc_free;
+
+ *device = &dev->device.common;
+ status = 0;
+ } else {
+ status = fb_device_open(module, name, device);
+ }
+ return status;
+}
diff --git a/gralloc/gralloc_priv.h b/gralloc/gralloc_priv.h
new file mode 100644
index 0000000..2cd1007
--- /dev/null
+++ b/gralloc/gralloc_priv.h
@@ -0,0 +1,114 @@
+/*
+ * 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.
+ */
+
+#ifndef GRALLOC_PRIV_H_
+#define GRALLOC_PRIV_H_
+
+#include <stdint.h>
+#include <limits.h>
+#include <sys/cdefs.h>
+#include <hardware/gralloc.h>
+#include <pthread.h>
+#include <errno.h>
+#include <unistd.h>
+
+#include <cutils/native_handle.h>
+
+#include <linux/fb.h>
+
+/*****************************************************************************/
+
+struct private_module_t;
+struct private_handle_t;
+
+struct private_module_t {
+ gralloc_module_t base;
+
+ private_handle_t* framebuffer;
+ uint32_t flags;
+ uint32_t numBuffers;
+ uint32_t bufferMask;
+ pthread_mutex_t lock;
+ buffer_handle_t currentBuffer;
+ int pmem_master;
+ void* pmem_master_base;
+
+ struct fb_var_screeninfo info;
+ struct fb_fix_screeninfo finfo;
+ float xdpi;
+ float ydpi;
+ float fps;
+};
+
+/*****************************************************************************/
+
+#ifdef __cplusplus
+struct private_handle_t : public native_handle {
+#else
+struct private_handle_t {
+ struct native_handle nativeHandle;
+#endif
+
+ enum {
+ PRIV_FLAGS_FRAMEBUFFER = 0x00000001
+ };
+
+ // file-descriptors
+ int fd;
+ // ints
+ int magic;
+ int flags;
+ int size;
+ int offset;
+
+ // FIXME: the attributes below should be out-of-line
+ uint64_t base __attribute__((aligned(8)));
+ int pid;
+
+#ifdef __cplusplus
+ static inline int sNumInts() {
+ return (((sizeof(private_handle_t) - sizeof(native_handle_t))/sizeof(int)) - sNumFds);
+ }
+ static const int sNumFds = 1;
+ static const int sMagic = 0x3141592;
+
+ private_handle_t(int fd, int size, int flags) :
+ fd(fd), magic(sMagic), flags(flags), size(size), offset(0),
+ base(0), pid(getpid())
+ {
+ version = sizeof(native_handle);
+ numInts = sNumInts();
+ numFds = sNumFds;
+ }
+ ~private_handle_t() {
+ magic = 0;
+ }
+
+ static int validate(const native_handle* h) {
+ const private_handle_t* hnd = (const private_handle_t*)h;
+ if (!h || h->version != sizeof(native_handle) ||
+ h->numInts != sNumInts() || h->numFds != sNumFds ||
+ hnd->magic != sMagic)
+ {
+ ALOGE("invalid gralloc handle (at %p)", h);
+ return -EINVAL;
+ }
+ return 0;
+ }
+#endif
+};
+
+#endif /* GRALLOC_PRIV_H_ */
diff --git a/gralloc/mapper.cpp b/gralloc/mapper.cpp
new file mode 100644
index 0000000..ee3e40e
--- /dev/null
+++ b/gralloc/mapper.cpp
@@ -0,0 +1,187 @@
+/*
+ * 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 <errno.h>
+#include <limits.h>
+#include <pthread.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <cutils/atomic.h>
+#include <log/log.h>
+
+#include <hardware/hardware.h>
+#include <hardware/gralloc.h>
+
+#include "gralloc_priv.h"
+
+
+/*****************************************************************************/
+
+static int gralloc_map(gralloc_module_t const* /*module*/,
+ buffer_handle_t handle,
+ void** vaddr)
+{
+ private_handle_t* hnd = (private_handle_t*)handle;
+ if (!(hnd->flags & private_handle_t::PRIV_FLAGS_FRAMEBUFFER)) {
+ size_t size = hnd->size;
+ void* mappedAddress = mmap(0, size,
+ PROT_READ|PROT_WRITE, MAP_SHARED, hnd->fd, 0);
+ if (mappedAddress == MAP_FAILED) {
+ ALOGE("Could not mmap %s", strerror(errno));
+ return -errno;
+ }
+ hnd->base = uintptr_t(mappedAddress) + hnd->offset;
+ //ALOGD("gralloc_map() succeeded fd=%d, off=%d, size=%d, vaddr=%p",
+ // hnd->fd, hnd->offset, hnd->size, mappedAddress);
+ }
+ *vaddr = (void*)hnd->base;
+ 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->flags & private_handle_t::PRIV_FLAGS_FRAMEBUFFER)) {
+ void* base = (void*)hnd->base;
+ size_t size = hnd->size;
+ //ALOGD("unmapping from %p, size=%d", base, size);
+ if (munmap(base, size) < 0) {
+ ALOGE("Could not unmap %s", strerror(errno));
+ }
+ }
+ hnd->base = 0;
+ return 0;
+}
+
+/*****************************************************************************/
+
+int gralloc_register_buffer(gralloc_module_t const* module,
+ buffer_handle_t handle)
+{
+ if (private_handle_t::validate(handle) < 0)
+ return -EINVAL;
+
+ // *** WARNING WARNING WARNING ***
+ //
+ // If a buffer handle is passed from the process that allocated it to a
+ // different process, and then back to the allocator process, we will
+ // create a second mapping of the buffer. If the process reads and writes
+ // through both mappings, normal memory ordering guarantees may be
+ // violated, depending on the processor cache implementation*.
+ //
+ // If you are deriving a new gralloc implementation from this code, don't
+ // do this. A "real" gralloc should provide a single reference-counted
+ // mapping for each buffer in a process.
+ //
+ // In the current system, there is one case that needs a buffer to be
+ // registered in the same process that allocated it. The SurfaceFlinger
+ // process acts as the IGraphicBufferAlloc Binder provider, so all gralloc
+ // allocations happen in its process. After returning the buffer handle to
+ // the IGraphicBufferAlloc client, SurfaceFlinger free's its handle to the
+ // buffer (unmapping it from the SurfaceFlinger process). If
+ // SurfaceFlinger later acts as the producer end of the buffer queue the
+ // buffer belongs to, it will get a new handle to the buffer in response
+ // to IGraphicBufferProducer::requestBuffer(). Like any buffer handle
+ // received through Binder, the SurfaceFlinger process will register it.
+ // Since it already freed its original handle, it will only end up with
+ // one mapping to the buffer and there will be no problem.
+ //
+ // Currently SurfaceFlinger only acts as a buffer producer for a remote
+ // consumer when taking screenshots and when using virtual displays.
+ //
+ // Eventually, each application should be allowed to make its own gralloc
+ // allocations, solving the problem. Also, this ashmem-based gralloc
+ // should go away, replaced with a real ion-based gralloc.
+ //
+ // * Specifically, associative virtually-indexed caches are likely to have
+ // problems. Most modern L1 caches fit that description.
+
+ private_handle_t* hnd = (private_handle_t*)handle;
+ ALOGD_IF(hnd->pid == getpid(),
+ "Registering a buffer in the process that created it. "
+ "This may cause memory ordering problems.");
+
+ void *vaddr;
+ return gralloc_map(module, handle, &vaddr);
+}
+
+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;
+ if (hnd->base)
+ gralloc_unmap(module, handle);
+
+ return 0;
+}
+
+int mapBuffer(gralloc_module_t const* module,
+ private_handle_t* hnd)
+{
+ void* vaddr;
+ return gralloc_map(module, hnd, &vaddr);
+}
+
+int terminateBuffer(gralloc_module_t const* module,
+ private_handle_t* hnd)
+{
+ if (hnd->base) {
+ // this buffer was mapped, unmap it now
+ gralloc_unmap(module, hnd);
+ }
+
+ 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;
+}
