LOCAL_MODULE:= libhardware
include $(BUILD_SHARED_LIBRARY)
+
+include $(addsuffix /Android.mk, $(addprefix $(LOCAL_PATH)/, \
+ modules/gralloc \
+ ))
+
\ No newline at end of file
* led.default.so
*/
-#define HAL_DEFAULT_VARIANT "default"
static const char *variant_keys[] = {
"ro.hardware", /* This goes first so that it can pick up a different
file on the emulator. */
"ro.board.platform",
"ro.arch"
};
-#define HAL_VARIANT_KEYS_COUNT (sizeof(variant_keys)/sizeof(variant_keys[0]))
+
+static const int HAL_VARIANT_KEYS_COUNT =
+ (sizeof(variant_keys)/sizeof(variant_keys[0]));
/**
- * Load the file defined by the variant and if succesfull
+ * Load the file defined by the variant and if successful
* return the dlopen handle and the hmi.
* @return 0 = success, !0 = failure.
*/
static int load(const char *id,
- const char *variant,
- const struct hw_module_t **pHmi)
+ const char *path,
+ const struct hw_module_t **pHmi)
{
int status;
void *handle;
- const struct hw_module_t *hmi;
- char path[PATH_MAX];
-
- /* Construct the path. */
- snprintf(path, sizeof(path), "%s/%s.%s.so", HAL_LIBRARY_PATH, id, variant);
-
- LOGV("load: E id=%s path=%s", id, path);
+ struct hw_module_t *hmi;
/*
* load the symbols resolving undefined symbols before
handle = dlopen(path, RTLD_NOW);
if (handle == NULL) {
char const *err_str = dlerror();
- LOGW("load: module=%s error=%s", path, err_str);
+ LOGE("load: module=%s\n%s", path, err_str?err_str:"unknown");
status = -EINVAL;
goto done;
}
/* Get the address of the struct hal_module_info. */
const char *sym = HAL_MODULE_INFO_SYM_AS_STR;
- hmi = (const struct hw_module_t *)dlsym(handle, sym);
+ hmi = (struct hw_module_t *)dlsym(handle, sym);
if (hmi == NULL) {
- char const *err_str = dlerror();
LOGE("load: couldn't find symbol %s", sym);
status = -EINVAL;
goto done;
goto done;
}
+ hmi->dso = handle;
+
/* success */
status = 0;
-done:
+ done:
if (status != 0) {
hmi = NULL;
if (handle != NULL) {
dlclose(handle);
handle = NULL;
}
+ } else {
+ LOGV("loaded HAL id=%s path=%s hmi=%p handle=%p",
+ id, path, *pHmi, handle);
}
*pHmi = hmi;
- LOGV("load: X id=%s path=%s hmi=%p handle=%p status=%d",
- id, path, *pHmi, handle, status);
return status;
}
int i;
const struct hw_module_t *hmi = NULL;
char prop[PATH_MAX];
+ char path[PATH_MAX];
/*
* Here we rely on the fact that calling dlopen multiple times on
* a new copy of the library).
* We also assume that dlopen() is thread-safe.
*/
-
- LOGV("hal_module_info_get: Load module id=%s", id);
-
- status = -EINVAL;
/* Loop through the configuration variants looking for a module */
- for (i = 0; (status != 0) && (i < HAL_VARIANT_KEYS_COUNT); i++) {
- if (property_get(variant_keys[i], prop, NULL) == 0) {
+ for (i=0 ; i<HAL_VARIANT_KEYS_COUNT+1 ; i++) {
+ if (i < HAL_VARIANT_KEYS_COUNT) {
+ if (property_get(variant_keys[i], prop, NULL) == 0) {
+ continue;
+ }
+ snprintf(path, sizeof(path), "%s/%s.%s.so",
+ HAL_LIBRARY_PATH, id, prop);
+ } else {
+ snprintf(path, sizeof(path), "%s/%s.default.so",
+ HAL_LIBRARY_PATH, id);
+ }
+ if (access(path, R_OK)) {
continue;
}
- status = load(id, prop, &hmi);
+ /* we found a library matching this id/variant */
+ break;
}
- /* Try default */
- if (status != 0) {
- status = load(id, HAL_DEFAULT_VARIANT, &hmi);
+ status = -ENOENT;
+ if (i < HAL_VARIANT_KEYS_COUNT+1) {
+ /* load the module, if this fails, we're doomed, and we should not try
+ * to load a different variant. */
+ status = load(id, path, module);
}
-
- *module = hmi;
- LOGV("hal_module_info_get: X id=%s hmi=%p status=%d", id, hmi, status);
return status;
}
*/
enum {
COPYBIT_FORMAT_RGBA_8888 = HAL_PIXEL_FORMAT_RGBA_8888,
+ COPYBIT_FORMAT_RGBX_8888 = HAL_PIXEL_FORMAT_RGBX_8888,
+ COPYBIT_FORMAT_RGB_888 = HAL_PIXEL_FORMAT_RGB_888,
COPYBIT_FORMAT_RGB_565 = HAL_PIXEL_FORMAT_RGB_565,
COPYBIT_FORMAT_BGRA_8888 = HAL_PIXEL_FORMAT_BGRA_8888,
COPYBIT_FORMAT_RGBA_5551 = HAL_PIXEL_FORMAT_RGBA_5551,
uint32_t h;
/* format COPYBIT_FORMAT_xxx */
int32_t format;
- /* offset from base to first pixel */
- uint32_t offset;
/* base of buffer with image */
- void *base;
- /* file descriptor for image */
- int fd;
+ void *base;
+ /* handle to the image */
+ native_handle_t* handle;
};
/* Rectangle */
--- /dev/null
+/*
+ * 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 ANDROID_GRALLOC_INTERFACE_H
+#define ANDROID_GRALLOC_INTERFACE_H
+
+#include <cutils/native_handle.h>
+
+#include <hardware/hardware.h>
+
+#include <stdint.h>
+#include <sys/cdefs.h>
+#include <sys/types.h>
+
+__BEGIN_DECLS
+
+/**
+ * The id of this module
+ */
+#define GRALLOC_HARDWARE_MODULE_ID "gralloc"
+
+/**
+ * Name of the graphics device to open
+ */
+
+#define GRALLOC_HARDWARE_FB0 "fb0"
+#define GRALLOC_HARDWARE_GPU0 "gpu0"
+
+enum {
+ /* buffer is never read in software */
+ GRALLOC_USAGE_SW_READ_NEVER = 0x00000000,
+ /* buffer is rarely read in software */
+ GRALLOC_USAGE_SW_READ_RARELY = 0x00000002,
+ /* buffer is often read in software */
+ GRALLOC_USAGE_SW_READ_OFTEN = 0x00000003,
+ /* mask for the software read values */
+ GRALLOC_USAGE_SW_READ_MASK = 0x0000000F,
+
+ /* buffer is never written in software */
+ GRALLOC_USAGE_SW_WRITE_NEVER = 0x00000000,
+ /* buffer is never written in software */
+ GRALLOC_USAGE_SW_WRITE_RARELY = 0x00000020,
+ /* buffer is never written in software */
+ GRALLOC_USAGE_SW_WRITE_OFTEN = 0x00000030,
+ /* mask for the software write values */
+ GRALLOC_USAGE_SW_WRITE_MASK = 0x000000F0,
+
+ /* buffer will be used as an OpenGL ES texture */
+ GRALLOC_USAGE_HW_TEXTURE = 0x00000100,
+ /* buffer will be used as an OpenGL ES render target */
+ GRALLOC_USAGE_HW_RENDER = 0x00000200,
+ /* buffer will be used by the 2D hardware blitter */
+ GRALLOC_USAGE_HW_2D = 0x00000C00,
+ /* buffer will be used with the framebuffer device */
+ GRALLOC_USAGE_HW_FB = 0x00001000,
+ /* mask for the software usage bit-mask */
+ GRALLOC_USAGE_HW_MASK = 0x00001F00,
+};
+
+/*****************************************************************************/
+
+typedef const native_handle* buffer_handle_t;
+
+enum {
+ /* FIXME: this only exists to work-around some issues with
+ * the video and camera frameworks. don't implement unless
+ * you know what you're doing.
+ */
+ GRALLOC_MODULE_PERFORM_CREATE_HANDLE_FROM_BUFFER = 0x080000001,
+};
+
+/**
+ * Every hardware module must have a data structure named HAL_MODULE_INFO_SYM
+ * and the fields of this data structure must begin with hw_module_t
+ * followed by module specific information.
+ */
+typedef struct gralloc_module_t {
+ struct hw_module_t common;
+
+ /*
+ * (*registerBuffer)() must be called before a buffer_handle_t that has not
+ * been created with (*alloc_device_t::alloc)() can be used.
+ *
+ * This is intended to be used with buffer_handle_t's that have been
+ * received in this process through IPC.
+ *
+ * This function checks that the handle is indeed a valid one and prepares
+ * it for use with (*lock)() and (*unlock)().
+ *
+ * It is not necessary to call (*registerBuffer)() on a handle created
+ * with (*alloc_device_t::alloc)().
+ *
+ * returns an error if this buffer_handle_t is not valid.
+ */
+ int (*registerBuffer)(struct gralloc_module_t const* module,
+ buffer_handle_t handle);
+
+ /*
+ * (*unregisterBuffer)() is called once this handle is no longer needed in
+ * this process. After this call, it is an error to call (*lock)(),
+ * (*unlock)(), or (*registerBuffer)().
+ *
+ * This function doesn't close or free the handle itself; this is done
+ * by other means, usually through libcutils's native_handle_close() and
+ * native_handle_free().
+ *
+ * It is an error to call (*unregisterBuffer)() on a buffer that wasn't
+ * explicitly registered first.
+ */
+ int (*unregisterBuffer)(struct gralloc_module_t const* module,
+ buffer_handle_t handle);
+
+ /*
+ * The (*lock)() method is called before a buffer is accessed for the
+ * specified usage. This call may block, for instance if the h/w needs
+ * to finish rendering or if CPU caches need to be synchronized.
+ *
+ * The caller promises to modify only pixels in the area specified
+ * by (l,t,w,h).
+ *
+ * The content of the buffer outside of the specified area is NOT modified
+ * by this call.
+ *
+ * If usage specifies GRALLOC_USAGE_SW_*, vaddr is filled with the address
+ * of the buffer in virtual memory.
+ *
+ * THREADING CONSIDERATIONS:
+ *
+ * It is legal for several different threads to lock a buffer from
+ * read access, none of the threads are blocked.
+ *
+ * However, locking a buffer simultaneously for write or read/write is
+ * undefined, but:
+ * - shall not result in termination of the process
+ * - shall not block the caller
+ * It is acceptable to return an error or to leave the buffer's content
+ * into an indeterminate state.
+ *
+ * If the buffer was created with a usage mask incompatible with the
+ * requested usage flags here, -EINVAL is returned.
+ *
+ */
+
+ int (*lock)(struct gralloc_module_t const* module,
+ buffer_handle_t handle, int usage,
+ int l, int t, int w, int h,
+ void** vaddr);
+
+
+ /*
+ * The (*unlock)() method must be called after all changes to the buffer
+ * are completed.
+ */
+
+ int (*unlock)(struct gralloc_module_t const* module,
+ buffer_handle_t handle);
+
+
+ /* reserved for future use */
+ int (*perform)(struct gralloc_module_t const* module,
+ int operation, ... );
+
+ /* reserved for future use */
+ void* reserved_proc[7];
+} gralloc_module_t;
+
+/*****************************************************************************/
+
+/**
+ * Every device data structure must begin with hw_device_t
+ * followed by module specific public methods and attributes.
+ */
+
+typedef struct alloc_device_t {
+ struct hw_device_t common;
+
+ /*
+ * (*alloc)() Allocates a buffer in graphic memory with the requested
+ * parameters and returns a buffer_handle_t and the stride in pixels to
+ * allow the implementation to satisfy hardware constraints on the width
+ * of a pixmap (eg: it may have to be multiple of 8 pixels).
+ * The CALLER TAKES OWNERSHIP of the buffer_handle_t.
+ *
+ * Returns 0 on success or -errno on error.
+ */
+
+ int (*alloc)(struct alloc_device_t* dev,
+ int w, int h, int format, int usage,
+ buffer_handle_t* handle, int* stride);
+
+ /*
+ * (*free)() Frees a previously allocated buffer.
+ * Behavior is undefined if the buffer is still mapped in any process,
+ * but shall not result in termination of the program or security breaches
+ * (allowing a process to get access to another process' buffers).
+ * THIS FUNCTION TAKES OWNERSHIP of the buffer_handle_t which becomes
+ * invalid after the call.
+ *
+ * Returns 0 on success or -errno on error.
+ */
+ int (*free)(struct alloc_device_t* dev,
+ buffer_handle_t handle);
+
+} alloc_device_t;
+
+
+typedef struct framebuffer_device_t {
+ struct hw_device_t common;
+
+ /* flags describing some attributes of the framebuffer */
+ const uint32_t flags;
+
+ /* dimensions of the framebuffer in pixels */
+ const uint32_t width;
+ const uint32_t height;
+
+ /* frambuffer stride in pixels */
+ const int stride;
+
+ /* framebuffer pixel format */
+ const int format;
+
+ /* resolution of the framebuffer's display panel in pixel per inch*/
+ const float xdpi;
+ const float ydpi;
+
+ /* framebuffer's display panel refresh rate in frames per second */
+ const float fps;
+
+ /* min swap interval supported by this framebuffer */
+ const int minSwapInterval;
+
+ /* max swap interval supported by this framebuffer */
+ const int maxSwapInterval;
+
+ int reserved[8];
+
+ /*
+ * requests a specific swap-interval (same definition than EGL)
+ *
+ * Returns 0 on success or -errno on error.
+ */
+ int (*setSwapInterval)(struct framebuffer_device_t* window,
+ int interval);
+
+ /*
+ * This hook is OPTIONAL.
+ *
+ * It is non NULL If the framebuffer driver supports "update-on-demand"
+ * and the given rectangle is the area of the screen that gets
+ * updated during (*post)().
+ *
+ * This is useful on devices that are able to DMA only a portion of
+ * the screen to the display panel, upon demand -- as opposed to
+ * constantly refreshing the panel 60 times per second, for instance.
+ *
+ * Only the area defined by this rectangle is guaranteed to be valid, that
+ * is, the driver is not allowed to post anything outside of this
+ * rectangle.
+ *
+ * The rectangle evaluated during (*post)() and specifies which area
+ * of the buffer passed in (*post)() shall to be posted.
+ *
+ * return -EINVAL if width or height <=0, or if left or top < 0
+ */
+ int (*setUpdateRect)(struct framebuffer_device_t* window,
+ int left, int top, int width, int height);
+
+ /*
+ * Post <buffer> to the display (display it on the screen)
+ * The buffer must have been allocated with the
+ * GRALLOC_USAGE_HW_FB usage flag.
+ * buffer must be the same width and height as the display and must NOT
+ * be locked.
+ *
+ * The buffer is shown during the next VSYNC.
+ *
+ * If the same buffer is posted again (possibly after some other buffer),
+ * post() will block until the the first post is completed.
+ *
+ * Internally, post() is expected to lock the buffer so that a
+ * subsequent call to gralloc_module_t::(*lock)() with USAGE_RENDER or
+ * USAGE_*_WRITE will block until it is safe; that is typically once this
+ * buffer is shown and another buffer has been posted.
+ *
+ * Returns 0 on success or -errno on error.
+ */
+ int (*post)(struct framebuffer_device_t* dev, buffer_handle_t buffer);
+
+
+ /*
+ * The (*compositionComplete)() method must be called after the
+ * compositor has finished issuing GL commands for client buffers.
+ */
+
+ int (*compositionComplete)(struct framebuffer_device_t* dev);
+
+
+ void* reserved_proc[8];
+
+} framebuffer_device_t;
+
+
+/** convenience API for opening and closing a supported device */
+
+static inline int gralloc_open(const struct hw_module_t* module,
+ struct alloc_device_t** device) {
+ return module->methods->open(module,
+ GRALLOC_HARDWARE_GPU0, (struct hw_device_t**)device);
+}
+
+static inline int gralloc_close(struct alloc_device_t* device) {
+ return device->common.close(&device->common);
+}
+
+
+static inline int framebuffer_open(const struct hw_module_t* module,
+ struct framebuffer_device_t** device) {
+ return module->methods->open(module,
+ GRALLOC_HARDWARE_FB0, (struct hw_device_t**)device);
+}
+
+static inline int framebuffer_close(struct framebuffer_device_t* device) {
+ return device->common.close(&device->common);
+}
+
+
+__END_DECLS
+
+#endif // ANDROID_ALLOC_INTERFACE_H
#include <stdint.h>
#include <sys/cdefs.h>
+#include <cutils/native_handle.h>
+
__BEGIN_DECLS
/*
* Value for the hw_module_t.tag field
*/
-#define HARDWARE_MODULE_TAG 'HWMT'
-#define HARDWARE_DEVICE_TAG 'HWDT'
+
+#define MAKE_TAG_CONSTANT(A,B,C,D) (((A) << 24) | ((B) << 16) | ((C) << 8) | (D))
+
+#define HARDWARE_MODULE_TAG MAKE_TAG_CONSTANT('H', 'W', 'M', 'T')
+#define HARDWARE_DEVICE_TAG MAKE_TAG_CONSTANT('H', 'W', 'D', 'T')
struct hw_module_t;
struct hw_module_methods_t;
* and the fields of this data structure must begin with hw_module_t
* followed by module specific information.
*/
-struct hw_module_t {
+typedef struct hw_module_t {
/** tag must be initialized to HARDWARE_MODULE_TAG */
uint32_t tag;
/** Modules methods */
struct hw_module_methods_t* methods;
-
+
+ /** module's dso */
+ void* dso;
+
/** padding to 128 bytes, reserved for future use */
- uint32_t reserved[32-6];
-};
+ uint32_t reserved[32-7];
-struct hw_module_methods_t {
+} hw_module_t;
+
+typedef struct hw_module_methods_t {
/** Open a specific device */
int (*open)(const struct hw_module_t* module, const char* id,
struct hw_device_t** device);
-};
+
+} hw_module_methods_t;
/**
* Every device data structure must begin with hw_device_t
* followed by module specific public methods and attributes.
*/
-struct hw_device_t {
+typedef struct hw_device_t {
/** tag must be initialized to HARDWARE_DEVICE_TAG */
uint32_t tag;
/** Close this device */
int (*close)(struct hw_device_t* device);
-};
+
+} hw_device_t;
/**
- * Name of the hal_module_info
+ * Name of the hal_module_info
*/
#define HAL_MODULE_INFO_SYM HMI
enum {
HAL_PIXEL_FORMAT_RGBA_8888 = 1,
+ HAL_PIXEL_FORMAT_RGBX_8888 = 2,
+ HAL_PIXEL_FORMAT_RGB_888 = 3,
HAL_PIXEL_FORMAT_RGB_565 = 4,
HAL_PIXEL_FORMAT_BGRA_8888 = 5,
HAL_PIXEL_FORMAT_RGBA_5551 = 6,
HAL_PIXEL_FORMAT_YCbCr_422_P = 0x12,
HAL_PIXEL_FORMAT_YCbCr_420_P = 0x13,
HAL_PIXEL_FORMAT_YCbCr_422_I = 0x14,
- HAL_PIXEL_FORMAT_YCbCr_420_I = 0x15
+ HAL_PIXEL_FORMAT_YCbCr_420_I = 0x15,
+ HAL_PIXEL_FORMAT_CbYCrY_422_I = 0x16,
+ HAL_PIXEL_FORMAT_CbYCrY_420_I = 0x17
};
*/
#define LIGHT_FLASH_TIMED 1
+/**
+ * To flash the light using hardware assist, set flashMode to
+ * the hardware mode.
+ */
+#define LIGHT_FLASH_HARDWARE 2
+
+/**
+ * Light brightness is managed by a user setting.
+ */
+#define BRIGHTNESS_MODE_USER 0
+
+/**
+ * Light brightness is managed by a light sensor.
+ */
+#define BRIGHTNESS_MODE_SENSOR 1
/**
* The parameters that can be set for a given light.
int flashMode;
int flashOnMS;
int flashOffMS;
+
+ /**
+ * Policy used by the framework to manage the light's brightness.
+ * Currently the values are BRIGHTNESS_MODE_USER and BRIGHTNESS_MODE_SENSOR.
+ */
+ int brightnessMode;
};
struct light_device_t {
OVERLAY_FORMAT_RGBA_8888 = HAL_PIXEL_FORMAT_RGBA_8888,
OVERLAY_FORMAT_RGB_565 = HAL_PIXEL_FORMAT_RGB_565,
OVERLAY_FORMAT_BGRA_8888 = HAL_PIXEL_FORMAT_BGRA_8888,
- OVERLAY_FORMAT_YCbCr_422_I = HAL_PIXEL_FORMAT_YCbCr_422_I,
- OVERLAY_FORMAT_YCbCr_420_I = HAL_PIXEL_FORMAT_YCbCr_420_I
+ OVERLAY_FORMAT_YCbCr_422_SP = HAL_PIXEL_FORMAT_YCbCr_422_SP,
+ OVERLAY_FORMAT_YCbCr_420_SP = HAL_PIXEL_FORMAT_YCbCr_420_SP,
+ OVERLAY_FORMAT_YCbYCr_422_I = HAL_PIXEL_FORMAT_YCbCr_422_I,
+ OVERLAY_FORMAT_YCbYCr_420_I = HAL_PIXEL_FORMAT_YCbCr_420_I,
+ OVERLAY_FORMAT_CbYCrY_422_I = HAL_PIXEL_FORMAT_CbYCrY_422_I,
+ OVERLAY_FORMAT_CbYCrY_420_I = HAL_PIXEL_FORMAT_CbYCrY_420_I,
+ OVERLAY_FORMAT_DEFAULT = 99 // The actual color format is determined
+ // by the overlay
};
/* values for copybit_set_parameter(OVERLAY_TRANSFORM) */
* supported. */
int (*setParameter)(struct overlay_control_device_t *dev,
overlay_t* overlay, int param, int value);
+
+ int (*stage)(struct overlay_control_device_t *dev, overlay_t* overlay);
+ int (*commit)(struct overlay_control_device_t *dev, overlay_t* overlay);
};
* overlay data module to its control module */
int (*initialize)(struct overlay_data_device_t *dev,
overlay_handle_t handle);
-
+
+ /* can be called to change the width and height of the overlay. */
+ int (*resizeInput)(struct overlay_data_device_t *dev,
+ uint32_t w, uint32_t h);
+
+ int (*setCrop)(struct overlay_data_device_t *dev,
+ uint32_t x, uint32_t y, uint32_t w, uint32_t h) ;
+
+ int (*getCrop)(struct overlay_data_device_t *dev,
+ uint32_t* x, uint32_t* y, uint32_t* w, uint32_t* h) ;
+
+ int (*setParameter)(struct overlay_data_device_t *dev,
+ int param, int value);
+
/* blocks until an overlay buffer is available and return that buffer. */
int (*dequeueBuffer)(struct overlay_data_device_t *dev,
overlay_buffer_t *buf);
*
* All values are in micro-Tesla (uT) and measure the ambient magnetic
* field in the X, Y and Z axis.
- *
+ *
+ * Proximity
+ * ---------
+ *
+ * The distance value is measured in centimeters. Note that some proximity
+ * sensors only support a binary "close" or "far" measurement. In this case,
+ * the sensor should report its maxRange value in the "far" state and a value
+ * less than maxRange in the "near" state.
+ *
+ * Light
+ * -----
+ *
+ * The light sensor value is returned in SI lux units.
+ *
*/
typedef struct {
union {
/* temperature is in degrees centigrade (Celsius) */
float temperature;
+
+ /* distance in centimeters */
+ float distance;
+
+ /* light in SI lux units */
+ float light;
};
/* time is in nanosecond */
* @return a native_handle_t if successful, NULL on error
*/
native_handle_t* (*open_data_source)(struct sensors_control_device_t *dev);
-
+
+ /**
+ * Releases any resources that were created by open_data_source.
+ * This call is optional and can be NULL if not implemented
+ * by the sensor HAL.
+ *
+ * @return 0 if successful, < 0 on error
+ */
+ int (*close_data_source)(struct sensors_control_device_t *dev);
+
/** Activate/deactivate one sensor.
*
* @param handle is the handle of the sensor to change.
--- /dev/null
+# 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, not prelinked and stored in
+# hw/<OVERLAY_HARDWARE_MODULE_ID>.<ro.product.board>.so
+include $(CLEAR_VARS)
+LOCAL_PRELINK_MODULE := false
+LOCAL_MODULE_PATH := $(TARGET_OUT_SHARED_LIBRARIES)/hw
+LOCAL_SHARED_LIBRARIES := liblog libcutils
+
+LOCAL_SRC_FILES := \
+ allocator.cpp \
+ gralloc.cpp \
+ framebuffer.cpp \
+ mapper.cpp
+
+LOCAL_MODULE := gralloc.default
+LOCAL_CFLAGS:= -DLOG_TAG=\"gralloc\"
+include $(BUILD_SHARED_LIBRARY)
--- /dev/null
+/*
+ * Copyright (C) 2009 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/log.h>
+
+#include "allocator.h"
+
+
+// align all the memory blocks on a cache-line boundary
+const int SimpleBestFitAllocator::kMemoryAlign = 32;
+
+SimpleBestFitAllocator::SimpleBestFitAllocator()
+ : mHeapSize(0)
+{
+}
+
+SimpleBestFitAllocator::SimpleBestFitAllocator(size_t size)
+ : mHeapSize(0)
+{
+ setSize(size);
+}
+
+SimpleBestFitAllocator::~SimpleBestFitAllocator()
+{
+ while(!mList.isEmpty()) {
+ delete mList.remove(mList.head());
+ }
+}
+
+ssize_t SimpleBestFitAllocator::setSize(size_t size)
+{
+ Locker::Autolock _l(mLock);
+ if (mHeapSize != 0) return -EINVAL;
+ size_t pagesize = getpagesize();
+ mHeapSize = ((size + pagesize-1) & ~(pagesize-1));
+ chunk_t* node = new chunk_t(0, mHeapSize / kMemoryAlign);
+ mList.insertHead(node);
+ return size;
+}
+
+
+size_t SimpleBestFitAllocator::size() const
+{
+ return mHeapSize;
+}
+
+ssize_t SimpleBestFitAllocator::allocate(size_t size, uint32_t flags)
+{
+ Locker::Autolock _l(mLock);
+ if (mHeapSize == 0) return -EINVAL;
+ ssize_t offset = alloc(size, flags);
+ return offset;
+}
+
+ssize_t SimpleBestFitAllocator::deallocate(size_t offset)
+{
+ Locker::Autolock _l(mLock);
+ if (mHeapSize == 0) return -EINVAL;
+ chunk_t const * const freed = dealloc(offset);
+ if (freed) {
+ return 0;
+ }
+ return -ENOENT;
+}
+
+ssize_t SimpleBestFitAllocator::alloc(size_t size, uint32_t flags)
+{
+ if (size == 0) {
+ return 0;
+ }
+ size = (size + kMemoryAlign-1) / kMemoryAlign;
+ chunk_t* free_chunk = 0;
+ chunk_t* cur = mList.head();
+
+ size_t pagesize = getpagesize();
+ while (cur) {
+ int extra = ( -cur->start & ((pagesize/kMemoryAlign)-1) ) ;
+
+ // best fit
+ if (cur->free && (cur->size >= (size+extra))) {
+ if ((!free_chunk) || (cur->size < free_chunk->size)) {
+ free_chunk = cur;
+ }
+ if (cur->size == size) {
+ break;
+ }
+ }
+ cur = cur->next;
+ }
+
+ if (free_chunk) {
+ const size_t free_size = free_chunk->size;
+ free_chunk->free = 0;
+ free_chunk->size = size;
+ if (free_size > size) {
+ int extra = ( -free_chunk->start & ((pagesize/kMemoryAlign)-1) ) ;
+ if (extra) {
+ chunk_t* split = new chunk_t(free_chunk->start, extra);
+ free_chunk->start += extra;
+ mList.insertBefore(free_chunk, split);
+ }
+
+ LOGE_IF(((free_chunk->start*kMemoryAlign)&(pagesize-1)),
+ "page is not aligned!!!");
+
+ const ssize_t tail_free = free_size - (size+extra);
+ if (tail_free > 0) {
+ chunk_t* split = new chunk_t(
+ free_chunk->start + free_chunk->size, tail_free);
+ mList.insertAfter(free_chunk, split);
+ }
+ }
+ return (free_chunk->start)*kMemoryAlign;
+ }
+ return -ENOMEM;
+}
+
+SimpleBestFitAllocator::chunk_t* SimpleBestFitAllocator::dealloc(size_t start)
+{
+ start = start / kMemoryAlign;
+ chunk_t* cur = mList.head();
+ while (cur) {
+ if (cur->start == start) {
+ LOG_FATAL_IF(cur->free,
+ "block at offset 0x%08lX of size 0x%08lX already freed",
+ cur->start*kMemoryAlign, cur->size*kMemoryAlign);
+
+ // merge freed blocks together
+ chunk_t* freed = cur;
+ cur->free = 1;
+ do {
+ chunk_t* const p = cur->prev;
+ chunk_t* const n = cur->next;
+ if (p && (p->free || !cur->size)) {
+ freed = p;
+ p->size += cur->size;
+ mList.remove(cur);
+ delete cur;
+ }
+ cur = n;
+ } while (cur && cur->free);
+
+ #ifndef NDEBUG
+ if (!freed->free) {
+ dump_l("dealloc (!freed->free)");
+ }
+ #endif
+ LOG_FATAL_IF(!freed->free,
+ "freed block at offset 0x%08lX of size 0x%08lX is not free!",
+ freed->start * kMemoryAlign, freed->size * kMemoryAlign);
+
+ return freed;
+ }
+ cur = cur->next;
+ }
+ return 0;
+}
--- /dev/null
+/*
+ * Copyright (C) 2009 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_ALLOCATOR_H_
+#define GRALLOC_ALLOCATOR_H_
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include "gr.h"
+
+// ----------------------------------------------------------------------------
+
+/*
+ * A simple templatized doubly linked-list implementation
+ */
+
+template <typename NODE>
+class LinkedList
+{
+ NODE* mFirst;
+ NODE* mLast;
+
+public:
+ LinkedList() : mFirst(0), mLast(0) { }
+ bool isEmpty() const { return mFirst == 0; }
+ NODE const* head() const { return mFirst; }
+ NODE* head() { return mFirst; }
+ NODE const* tail() const { return mLast; }
+ NODE* tail() { return mLast; }
+
+ void insertAfter(NODE* node, NODE* newNode) {
+ newNode->prev = node;
+ newNode->next = node->next;
+ if (node->next == 0) mLast = newNode;
+ else node->next->prev = newNode;
+ node->next = newNode;
+ }
+
+ void insertBefore(NODE* node, NODE* newNode) {
+ newNode->prev = node->prev;
+ newNode->next = node;
+ if (node->prev == 0) mFirst = newNode;
+ else node->prev->next = newNode;
+ node->prev = newNode;
+ }
+
+ void insertHead(NODE* newNode) {
+ if (mFirst == 0) {
+ mFirst = mLast = newNode;
+ newNode->prev = newNode->next = 0;
+ } else {
+ newNode->prev = 0;
+ newNode->next = mFirst;
+ mFirst->prev = newNode;
+ mFirst = newNode;
+ }
+ }
+
+ void insertTail(NODE* newNode) {
+ if (mLast == 0) {
+ insertHead(newNode);
+ } else {
+ newNode->prev = mLast;
+ newNode->next = 0;
+ mLast->next = newNode;
+ mLast = newNode;
+ }
+ }
+
+ NODE* remove(NODE* node) {
+ if (node->prev == 0) mFirst = node->next;
+ else node->prev->next = node->next;
+ if (node->next == 0) mLast = node->prev;
+ else node->next->prev = node->prev;
+ return node;
+ }
+};
+
+class SimpleBestFitAllocator
+{
+public:
+
+ SimpleBestFitAllocator();
+ SimpleBestFitAllocator(size_t size);
+ ~SimpleBestFitAllocator();
+
+ ssize_t setSize(size_t size);
+
+ ssize_t allocate(size_t size, uint32_t flags = 0);
+ ssize_t deallocate(size_t offset);
+ size_t size() const;
+
+private:
+ struct chunk_t {
+ chunk_t(size_t start, size_t size)
+ : start(start), size(size), free(1), prev(0), next(0) {
+ }
+ size_t start;
+ size_t size : 28;
+ int free : 4;
+ mutable chunk_t* prev;
+ mutable chunk_t* next;
+ };
+
+ ssize_t alloc(size_t size, uint32_t flags);
+ chunk_t* dealloc(size_t start);
+
+ static const int kMemoryAlign;
+ mutable Locker mLock;
+ LinkedList<chunk_t> mList;
+ size_t mHeapSize;
+};
+
+#endif /* GRALLOC_ALLOCATOR_H_ */
--- /dev/null
+/*
+ * 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 <sys/mman.h>
+
+#include <dlfcn.h>
+
+#include <cutils/ashmem.h>
+#include <cutils/log.h>
+
+#include <hardware/hardware.h>
+#include <hardware/gralloc.h>
+
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/ioctl.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include <cutils/log.h>
+#include <cutils/atomic.h>
+
+#if HAVE_ANDROID_OS
+#include <linux/fb.h>
+#endif
+
+#include "gralloc_priv.h"
+#include "gr.h"
+
+/*****************************************************************************/
+
+// numbers of buffers for page flipping
+#define NUM_BUFFERS 2
+
+
+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 (m->currentBuffer) {
+ m->base.unlock(&m->base, m->currentBuffer);
+ m->currentBuffer = 0;
+ }
+
+ if (hnd->flags & private_handle_t::PRIV_FLAGS_FRAMEBUFFER) {
+
+ m->base.lock(&m->base, buffer,
+ private_module_t::PRIV_USAGE_LOCKED_FOR_POST,
+ 0, 0, m->info.xres, m->info.yres, NULL);
+
+ 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) {
+ LOGE("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;
+
+ /*
+ * Explicitly request 5/6/5
+ */
+ info.bits_per_pixel = 16;
+ info.red.offset = 11;
+ info.red.length = 5;
+ info.green.offset = 5;
+ info.green.length = 6;
+ info.blue.offset = 0;
+ info.blue.length = 5;
+ info.transp.offset = 0;
+ info.transp.length = 0;
+
+ /*
+ * Request NUM_BUFFERS screens (at lest 2 for page flipping)
+ */
+ info.yres_virtual = info.yres * NUM_BUFFERS;
+
+
+ uint32_t flags = PAGE_FLIP;
+ if (ioctl(fd, FBIOPUT_VSCREENINFO, &info) == -1) {
+ info.yres_virtual = info.yres;
+ flags &= ~PAGE_FLIP;
+ LOGW("FBIOPUT_VSCREENINFO failed, page flipping not supported");
+ }
+
+ if (info.yres_virtual < info.yres * 2) {
+ // we need at least 2 for page-flipping
+ info.yres_virtual = info.yres;
+ flags &= ~PAGE_FLIP;
+ LOGW("page flipping not supported (yres_virtual=%d, requested=%d)",
+ info.yres_virtual, info.yres*2);
+ }
+
+ if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1)
+ return -errno;
+
+ int refreshRate = 1000000000000000LLU /
+ (
+ uint64_t( info.upper_margin + info.lower_margin + info.yres )
+ * ( info.left_margin + info.right_margin + info.xres )
+ * info.pixclock
+ );
+
+ 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;
+
+ LOGI( "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
+ );
+
+ LOGI( "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,
+ private_handle_t::PRIV_FLAGS_USES_PMEM);
+
+ 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) {
+ LOGE("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)) {
+ alloc_device_t* gralloc_device;
+ status = gralloc_open(module, &gralloc_device);
+ if (status < 0)
+ return status;
+
+ /* 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);
+ 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) = HAL_PIXEL_FORMAT_RGB_565;
+ 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;
+}
--- /dev/null
+/*
+ * 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>
+#ifdef HAVE_ANDROID_OS // just want PAGE_SIZE define
+# include <asm/page.h>
+#else
+# include <sys/user.h>
+#endif
+#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);
+
+/*****************************************************************************/
+
+class Locker {
+ pthread_mutex_t mutex;
+public:
+ class Autolock {
+ Locker& locker;
+ public:
+ inline 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_ */
--- /dev/null
+/*
+ * 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 <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <pthread.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/ioctl.h>
+
+#include <cutils/ashmem.h>
+#include <cutils/log.h>
+#include <cutils/atomic.h>
+
+#include <hardware/hardware.h>
+#include <hardware/gralloc.h>
+
+#include "gralloc_priv.h"
+#include "allocator.h"
+
+#if HAVE_ANDROID_OS
+#include <linux/android_pmem.h>
+#endif
+
+/*****************************************************************************/
+
+static SimpleBestFitAllocator sAllocator;
+
+/*****************************************************************************/
+
+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,
+ pmem_master: -1,
+ pmem_master_base: 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_USES_PMEM |
+ 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 init_pmem_area_locked(private_module_t* m)
+{
+ int err = 0;
+#if HAVE_ANDROID_OS // should probably define HAVE_PMEM somewhere
+ int master_fd = open("/dev/pmem", O_RDWR, 0);
+ if (master_fd >= 0) {
+
+ size_t size;
+ pmem_region region;
+ if (ioctl(master_fd, PMEM_GET_TOTAL_SIZE, ®ion) < 0) {
+ LOGE("PMEM_GET_TOTAL_SIZE failed, limp mode");
+ size = 8<<20; // 8 MiB
+ } else {
+ size = region.len;
+ }
+ sAllocator.setSize(size);
+
+ void* base = mmap(0, size,
+ PROT_READ|PROT_WRITE, MAP_SHARED, master_fd, 0);
+ if (base == MAP_FAILED) {
+ err = -errno;
+ base = 0;
+ close(master_fd);
+ master_fd = -1;
+ }
+ m->pmem_master = master_fd;
+ m->pmem_master_base = base;
+ } else {
+ err = -errno;
+ }
+ return err;
+#else
+ return -1;
+#endif
+}
+
+static int init_pmem_area(private_module_t* m)
+{
+ pthread_mutex_lock(&m->lock);
+ int err = m->pmem_master;
+ if (err == -1) {
+ // first time, try to initialize pmem
+ err = init_pmem_area_locked(m);
+ if (err) {
+ m->pmem_master = err;
+ }
+ } else if (err < 0) {
+ // pmem couldn't be initialized, never use it
+ } else {
+ // pmem OK
+ err = 0;
+ }
+ 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 flags = 0;
+
+ int fd = -1;
+ void* base = 0;
+ int offset = 0;
+ int lockState = 0;
+
+ size = roundUpToPageSize(size);
+
+#if HAVE_ANDROID_OS // should probably define HAVE_PMEM somewhere
+
+ if (usage & GRALLOC_USAGE_HW_TEXTURE) {
+ // enable pmem in that case, so our software GL can fallback to
+ // the copybit module.
+ flags |= private_handle_t::PRIV_FLAGS_USES_PMEM;
+ }
+
+ if (usage & GRALLOC_USAGE_HW_2D) {
+ flags |= private_handle_t::PRIV_FLAGS_USES_PMEM;
+ }
+
+ if ((flags & private_handle_t::PRIV_FLAGS_USES_PMEM) == 0) {
+try_ashmem:
+ fd = ashmem_create_region("gralloc-buffer", size);
+ if (fd < 0) {
+ LOGE("couldn't create ashmem (%s)", strerror(-errno));
+ err = -errno;
+ }
+ } else {
+ private_module_t* m = reinterpret_cast<private_module_t*>(
+ dev->common.module);
+
+ err = init_pmem_area(m);
+ if (err == 0) {
+ // PMEM buffers are always mmapped
+ base = m->pmem_master_base;
+ lockState |= private_handle_t::LOCK_STATE_MAPPED;
+
+ offset = sAllocator.allocate(size);
+ if (offset < 0) {
+ // no more pmem memory
+ err = -ENOMEM;
+ } else {
+ struct pmem_region sub = { offset, size };
+
+ // now create the "sub-heap"
+ fd = open("/dev/pmem", O_RDWR, 0);
+ err = fd < 0 ? fd : 0;
+
+ // and connect to it
+ if (err == 0)
+ err = ioctl(fd, PMEM_CONNECT, m->pmem_master);
+
+ // and make it available to the client process
+ if (err == 0)
+ err = ioctl(fd, PMEM_MAP, &sub);
+
+ if (err < 0) {
+ err = -errno;
+ close(fd);
+ sAllocator.deallocate(offset);
+ fd = -1;
+ }
+ //LOGD_IF(!err, "allocating pmem size=%d, offset=%d", size, offset);
+ memset((char*)base + offset, 0, size);
+ }
+ } else {
+ if ((usage & GRALLOC_USAGE_HW_2D) == 0) {
+ // the caller didn't request PMEM, so we can try something else
+ flags &= ~private_handle_t::PRIV_FLAGS_USES_PMEM;
+ err = 0;
+ goto try_ashmem;
+ } else {
+ LOGE("couldn't open pmem (%s)", strerror(-errno));
+ }
+ }
+ }
+
+#else // HAVE_ANDROID_OS
+
+ fd = ashmem_create_region("Buffer", size);
+ if (fd < 0) {
+ LOGE("couldn't create ashmem (%s)", strerror(-errno));
+ err = -errno;
+ }
+
+#endif // HAVE_ANDROID_OS
+
+ if (err == 0) {
+ private_handle_t* hnd = new private_handle_t(fd, size, flags);
+ hnd->offset = offset;
+ hnd->base = int(base)+offset;
+ hnd->lockState = lockState;
+ *pHandle = hnd;
+ }
+
+ LOGE_IF(err, "gralloc failed err=%s", strerror(-err));
+
+ return err;
+}
+
+/*****************************************************************************/
+
+static int gralloc_alloc(alloc_device_t* dev,
+ int w, int h, int format, int usage,
+ buffer_handle_t* pHandle, int* pStride)
+{
+ if (!pHandle || !pStride)
+ return -EINVAL;
+
+ size_t size, stride;
+ if (format == HAL_PIXEL_FORMAT_YCbCr_420_SP ||
+ format == HAL_PIXEL_FORMAT_YCbCr_422_SP)
+ {
+ // FIXME: there is no way to return the vstride
+ int vstride;
+ stride = (w + 1) & ~1;
+ switch (format) {
+ case HAL_PIXEL_FORMAT_YCbCr_420_SP:
+ size = stride * h * 2;
+ break;
+ case HAL_PIXEL_FORMAT_YCbCr_422_SP:
+ vstride = (h+1) & ~1;
+ size = (stride * vstride) + (w/2 * h/2) * 2;
+ break;
+ default:
+ return -EINVAL;
+ }
+ } else {
+ int align = 4;
+ int bpp = 0;
+ switch (format) {
+ case HAL_PIXEL_FORMAT_RGBA_8888:
+ case HAL_PIXEL_FORMAT_RGBX_8888:
+ case HAL_PIXEL_FORMAT_BGRA_8888:
+ bpp = 4;
+ break;
+ case HAL_PIXEL_FORMAT_RGB_888:
+ bpp = 3;
+ break;
+ case HAL_PIXEL_FORMAT_RGB_565:
+ case HAL_PIXEL_FORMAT_RGBA_5551:
+ case HAL_PIXEL_FORMAT_RGBA_4444:
+ bpp = 2;
+ break;
+ default:
+ return -EINVAL;
+ }
+ size_t bpr = (w*bpp + (align-1)) & ~(align-1);
+ size = bpr * h;
+ stride = bpr / bpp;
+ }
+
+ 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 {
+#if HAVE_ANDROID_OS
+ if (hnd->flags & private_handle_t::PRIV_FLAGS_USES_PMEM) {
+ if (hnd->fd >= 0) {
+ struct pmem_region sub = { hnd->offset, hnd->size };
+ int err = ioctl(hnd->fd, PMEM_UNMAP, &sub);
+ LOGE_IF(err<0, "PMEM_UNMAP failed (%s), "
+ "fd=%d, sub.offset=%lu, sub.size=%lu",
+ strerror(errno), hnd->fd, hnd->offset, hnd->size);
+ if (err == 0) {
+ // we can't deallocate the memory in case of UNMAP failure
+ // because it would give that process access to someone else's
+ // surfaces, which would be a security breach.
+ sAllocator.deallocate(hnd->offset);
+ }
+ }
+ }
+#endif // HAVE_ANDROID_OS
+ 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;
+}
--- /dev/null
+/*
+ * 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;
+
+ enum {
+ // flag to indicate we'll post this buffer
+ PRIV_USAGE_LOCKED_FOR_POST = 0x80000000
+ };
+};
+
+/*****************************************************************************/
+
+#ifdef __cplusplus
+struct private_handle_t : public native_handle {
+#else
+struct private_handle_t {
+ struct native_handle nativeHandle;
+#endif
+
+ enum {
+ PRIV_FLAGS_FRAMEBUFFER = 0x00000001,
+ PRIV_FLAGS_USES_PMEM = 0x00000002,
+ };
+
+ enum {
+ LOCK_STATE_WRITE = 1<<31,
+ LOCK_STATE_MAPPED = 1<<30,
+ LOCK_STATE_READ_MASK = 0x3FFFFFFF
+ };
+
+ // file-descriptors
+ int fd;
+ // ints
+ int magic;
+ int flags;
+ int size;
+ int offset;
+
+ // FIXME: the attributes below should be out-of-line
+ int base;
+ int lockState;
+ int writeOwner;
+ int pid;
+
+#ifdef __cplusplus
+ static const int sNumInts = 8;
+ 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), lockState(0), writeOwner(0), pid(getpid())
+ {
+ version = sizeof(native_handle);
+ numInts = sNumInts;
+ numFds = sNumFds;
+ }
+ ~private_handle_t() {
+ magic = 0;
+ }
+
+ bool usesPhysicallyContiguousMemory() {
+ return (flags & PRIV_FLAGS_USES_PMEM) != 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)
+ {
+ LOGE("invalid gralloc handle (at %p)", h);
+ return -EINVAL;
+ }
+ return 0;
+ }
+
+ static private_handle_t* dynamicCast(const native_handle* in) {
+ if (validate(in) == 0) {
+ return (private_handle_t*) in;
+ }
+ return NULL;
+ }
+#endif
+};
+
+#endif /* GRALLOC_PRIV_H_ */
--- /dev/null
+/*
+ * 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"
+
+
+// we need this for now because pmem cannot mmap at an offset
+#define PMEM_HACK 1
+
+/* desktop Linux needs a little help with gettid() */
+#if defined(ARCH_X86) && !defined(HAVE_ANDROID_OS)
+#define __KERNEL__
+# include <linux/unistd.h>
+pid_t gettid() { return syscall(__NR_gettid);}
+#undef __KERNEL__
+#endif
+
+/*****************************************************************************/
+
+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;
+#if PMEM_HACK
+ size += hnd->offset;
+#endif
+ void* mappedAddress = mmap(0, size,
+ PROT_READ|PROT_WRITE, MAP_SHARED, hnd->fd, 0);
+ if (mappedAddress == MAP_FAILED) {
+ LOGE("Could not mmap %s", strerror(errno));
+ return -errno;
+ }
+ hnd->base = intptr_t(mappedAddress) + hnd->offset;
+ //LOGD("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;
+#if PMEM_HACK
+ base = (void*)(intptr_t(base) - hnd->offset);
+ size += hnd->offset;
+#endif
+ //LOGD("unmapping from %p, size=%d", base, size);
+ if (munmap(base, size) < 0) {
+ LOGE("Could not unmap %s", strerror(errno));
+ }
+ }
+ hnd->base = 0;
+ return 0;
+}
+
+/*****************************************************************************/
+
+static pthread_mutex_t sMapLock = PTHREAD_MUTEX_INITIALIZER;
+
+/*****************************************************************************/
+
+int gralloc_register_buffer(gralloc_module_t const* module,
+ buffer_handle_t handle)
+{
+ if (private_handle_t::validate(handle) < 0)
+ return -EINVAL;
+
+ // In this implementation, we don't need to do anything here
+
+ /* NOTE: we need to initialize the buffer as not mapped/not locked
+ * because it shouldn't when this function is called the first time
+ * in a new process. Ideally these flags shouldn't be part of the
+ * handle, but instead maintained in the kernel or at least
+ * out-of-line
+ */
+
+ // if this handle was created in this process, then we keep it as is.
+ private_handle_t* hnd = (private_handle_t*)handle;
+ if (hnd->pid != getpid()) {
+ hnd->base = 0;
+ hnd->lockState = 0;
+ hnd->writeOwner = 0;
+ }
+ return 0;
+}
+
+int gralloc_unregister_buffer(gralloc_module_t const* module,
+ buffer_handle_t handle)
+{
+ if (private_handle_t::validate(handle) < 0)
+ return -EINVAL;
+
+ /*
+ * If the buffer has been mapped during a lock operation, it's time
+ * to un-map it. It's an error to be here with a locked buffer.
+ * NOTE: the framebuffer is handled differently and is never unmapped.
+ */
+
+ private_handle_t* hnd = (private_handle_t*)handle;
+
+ LOGE_IF(hnd->lockState & private_handle_t::LOCK_STATE_READ_MASK,
+ "[unregister] handle %p still locked (state=%08x)",
+ hnd, hnd->lockState);
+
+ // never unmap buffers that were created in this process
+ if (hnd->pid != getpid()) {
+ if (hnd->lockState & private_handle_t::LOCK_STATE_MAPPED) {
+ gralloc_unmap(module, handle);
+ }
+ hnd->base = 0;
+ hnd->lockState = 0;
+ hnd->writeOwner = 0;
+ }
+ return 0;
+}
+
+int terminateBuffer(gralloc_module_t const* module,
+ private_handle_t* hnd)
+{
+ /*
+ * If the buffer has been mapped during a lock operation, it's time
+ * to un-map it. It's an error to be here with a locked buffer.
+ */
+
+ LOGE_IF(hnd->lockState & private_handle_t::LOCK_STATE_READ_MASK,
+ "[terminate] handle %p still locked (state=%08x)",
+ hnd, hnd->lockState);
+
+ if (hnd->lockState & private_handle_t::LOCK_STATE_MAPPED) {
+ // this buffer was mapped, unmap it now
+ if ((hnd->flags & private_handle_t::PRIV_FLAGS_USES_PMEM) &&
+ (hnd->pid == getpid())) {
+ // ... unless it's a "master" pmem buffer, that is a buffer
+ // mapped in the process it's been allocated.
+ // (see gralloc_alloc_buffer())
+ } else {
+ 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)
+{
+ if (private_handle_t::validate(handle) < 0)
+ return -EINVAL;
+
+ int err = 0;
+ private_handle_t* hnd = (private_handle_t*)handle;
+ int32_t current_value, new_value;
+ int retry;
+
+ do {
+ current_value = hnd->lockState;
+ new_value = current_value;
+
+ if (current_value & private_handle_t::LOCK_STATE_WRITE) {
+ // already locked for write
+ LOGE("handle %p already locked for write", handle);
+ return -EBUSY;
+ } else if (current_value & private_handle_t::LOCK_STATE_READ_MASK) {
+ // already locked for read
+ if (usage & (GRALLOC_USAGE_SW_WRITE_MASK | GRALLOC_USAGE_HW_RENDER)) {
+ LOGE("handle %p already locked for read", handle);
+ return -EBUSY;
+ } else {
+ // this is not an error
+ //LOGD("%p already locked for read... count = %d",
+ // handle, (current_value & ~(1<<31)));
+ }
+ }
+
+ // not currently locked
+ if (usage & (GRALLOC_USAGE_SW_WRITE_MASK | GRALLOC_USAGE_HW_RENDER)) {
+ // locking for write
+ new_value |= private_handle_t::LOCK_STATE_WRITE;
+ }
+ new_value++;
+
+ retry = android_atomic_cmpxchg(current_value, new_value,
+ (volatile int32_t*)&hnd->lockState);
+ } while (retry);
+
+ if (new_value & private_handle_t::LOCK_STATE_WRITE) {
+ // locking for write, store the tid
+ hnd->writeOwner = gettid();
+ }
+
+ if (usage & (GRALLOC_USAGE_SW_READ_MASK | GRALLOC_USAGE_SW_WRITE_MASK)) {
+ if (!(current_value & private_handle_t::LOCK_STATE_MAPPED)) {
+ // we need to map for real
+ pthread_mutex_t* const lock = &sMapLock;
+ pthread_mutex_lock(lock);
+ if (!(hnd->lockState & private_handle_t::LOCK_STATE_MAPPED)) {
+ err = gralloc_map(module, handle, vaddr);
+ if (err == 0) {
+ android_atomic_or(private_handle_t::LOCK_STATE_MAPPED,
+ (volatile int32_t*)&(hnd->lockState));
+ }
+ }
+ pthread_mutex_unlock(lock);
+ }
+ *vaddr = (void*)hnd->base;
+ }
+
+ return err;
+}
+
+int gralloc_unlock(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;
+ int32_t current_value, new_value;
+
+ do {
+ current_value = hnd->lockState;
+ new_value = current_value;
+
+ if (current_value & private_handle_t::LOCK_STATE_WRITE) {
+ // locked for write
+ if (hnd->writeOwner == gettid()) {
+ hnd->writeOwner = 0;
+ new_value &= ~private_handle_t::LOCK_STATE_WRITE;
+ }
+ }
+
+ if ((new_value & private_handle_t::LOCK_STATE_READ_MASK) == 0) {
+ LOGE("handle %p not locked", handle);
+ return -EINVAL;
+ }
+
+ new_value--;
+
+ } while (android_atomic_cmpxchg(current_value, new_value,
+ (volatile int32_t*)&hnd->lockState));
+
+ return 0;
+}
open: overlay_device_open
};
-const struct overlay_module_t HAL_MODULE_INFO_SYM = {
+struct overlay_module_t HAL_MODULE_INFO_SYM = {
common: {
tag: HARDWARE_MODULE_TAG,
version_major: 1,
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