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-rw-r--r--exynos/exynos_drm.c444
1 files changed, 444 insertions, 0 deletions
diff --git a/exynos/exynos_drm.c b/exynos/exynos_drm.c
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+++ b/exynos/exynos_drm.c
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+/*
+ * Copyright (C) 2012 Samsung Electronics Co., Ltd.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Authors:
+ * Inki Dae <inki.dae@samsung.com>
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+
+#include <sys/mman.h>
+#include <linux/stddef.h>
+
+#include <xf86drm.h>
+
+#include "libdrm_macros.h"
+#include "exynos_drm.h"
+#include "exynos_drmif.h"
+
+#define U642VOID(x) ((void *)(unsigned long)(x))
+
+/*
+ * Create exynos drm device object.
+ *
+ * @fd: file descriptor to exynos drm driver opened.
+ *
+ * if true, return the device object else NULL.
+ */
+drm_public struct exynos_device * exynos_device_create(int fd)
+{
+ struct exynos_device *dev;
+
+ dev = calloc(sizeof(*dev), 1);
+ if (!dev) {
+ fprintf(stderr, "failed to create device[%s].\n",
+ strerror(errno));
+ return NULL;
+ }
+
+ dev->fd = fd;
+
+ return dev;
+}
+
+/*
+ * Destroy exynos drm device object
+ *
+ * @dev: exynos drm device object.
+ */
+drm_public void exynos_device_destroy(struct exynos_device *dev)
+{
+ free(dev);
+}
+
+/*
+ * Create a exynos buffer object to exynos drm device.
+ *
+ * @dev: exynos drm device object.
+ * @size: user-desired size.
+ * flags: user-desired memory type.
+ * user can set one or more types among several types to memory
+ * allocation and cache attribute types. and as default,
+ * EXYNOS_BO_NONCONTIG and EXYNOS-BO_NONCACHABLE types would
+ * be used.
+ *
+ * if true, return a exynos buffer object else NULL.
+ */
+drm_public struct exynos_bo * exynos_bo_create(struct exynos_device *dev,
+ size_t size, uint32_t flags)
+{
+ struct exynos_bo *bo;
+ struct drm_exynos_gem_create req = {
+ .size = size,
+ .flags = flags,
+ };
+
+ if (size == 0) {
+ fprintf(stderr, "invalid size.\n");
+ goto fail;
+ }
+
+ bo = calloc(sizeof(*bo), 1);
+ if (!bo) {
+ fprintf(stderr, "failed to create bo[%s].\n",
+ strerror(errno));
+ goto err_free_bo;
+ }
+
+ bo->dev = dev;
+
+ if (drmIoctl(dev->fd, DRM_IOCTL_EXYNOS_GEM_CREATE, &req)){
+ fprintf(stderr, "failed to create gem object[%s].\n",
+ strerror(errno));
+ goto err_free_bo;
+ }
+
+ bo->handle = req.handle;
+ bo->size = size;
+ bo->flags = flags;
+
+ return bo;
+
+err_free_bo:
+ free(bo);
+fail:
+ return NULL;
+}
+
+/*
+ * Get information to gem region allocated.
+ *
+ * @dev: exynos drm device object.
+ * @handle: gem handle to request gem info.
+ * @size: size to gem object and returned by kernel side.
+ * @flags: gem flags to gem object and returned by kernel side.
+ *
+ * with this function call, you can get flags and size to gem handle
+ * through bo object.
+ *
+ * if true, return 0 else negative.
+ */
+drm_public int exynos_bo_get_info(struct exynos_device *dev, uint32_t handle,
+ size_t *size, uint32_t *flags)
+{
+ int ret;
+ struct drm_exynos_gem_info req = {
+ .handle = handle,
+ };
+
+ ret = drmIoctl(dev->fd, DRM_IOCTL_EXYNOS_GEM_GET, &req);
+ if (ret < 0) {
+ fprintf(stderr, "failed to get gem object information[%s].\n",
+ strerror(errno));
+ return ret;
+ }
+
+ *size = req.size;
+ *flags = req.flags;
+
+ return 0;
+}
+
+/*
+ * Destroy a exynos buffer object.
+ *
+ * @bo: a exynos buffer object to be destroyed.
+ */
+drm_public void exynos_bo_destroy(struct exynos_bo *bo)
+{
+ if (!bo)
+ return;
+
+ if (bo->vaddr)
+ munmap(bo->vaddr, bo->size);
+
+ if (bo->handle) {
+ drmCloseBufferHandle(bo->dev->fd, bo->handle);
+ }
+
+ free(bo);
+}
+
+
+/*
+ * Get a exynos buffer object from a gem global object name.
+ *
+ * @dev: a exynos device object.
+ * @name: a gem global object name exported by another process.
+ *
+ * this interface is used to get a exynos buffer object from a gem
+ * global object name sent by another process for buffer sharing.
+ *
+ * if true, return a exynos buffer object else NULL.
+ *
+ */
+drm_public struct exynos_bo *
+exynos_bo_from_name(struct exynos_device *dev, uint32_t name)
+{
+ struct exynos_bo *bo;
+ struct drm_gem_open req = {
+ .name = name,
+ };
+
+ bo = calloc(sizeof(*bo), 1);
+ if (!bo) {
+ fprintf(stderr, "failed to allocate bo[%s].\n",
+ strerror(errno));
+ return NULL;
+ }
+
+ if (drmIoctl(dev->fd, DRM_IOCTL_GEM_OPEN, &req)) {
+ fprintf(stderr, "failed to open gem object[%s].\n",
+ strerror(errno));
+ goto err_free_bo;
+ }
+
+ bo->dev = dev;
+ bo->name = name;
+ bo->handle = req.handle;
+
+ return bo;
+
+err_free_bo:
+ free(bo);
+ return NULL;
+}
+
+/*
+ * Get a gem global object name from a gem object handle.
+ *
+ * @bo: a exynos buffer object including gem handle.
+ * @name: a gem global object name to be got by kernel driver.
+ *
+ * this interface is used to get a gem global object name from a gem object
+ * handle to a buffer that wants to share it with another process.
+ *
+ * if true, return 0 else negative.
+ */
+drm_public int exynos_bo_get_name(struct exynos_bo *bo, uint32_t *name)
+{
+ if (!bo->name) {
+ struct drm_gem_flink req = {
+ .handle = bo->handle,
+ };
+ int ret;
+
+ ret = drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_FLINK, &req);
+ if (ret) {
+ fprintf(stderr, "failed to get gem global name[%s].\n",
+ strerror(errno));
+ return ret;
+ }
+
+ bo->name = req.name;
+ }
+
+ *name = bo->name;
+
+ return 0;
+}
+
+drm_public uint32_t exynos_bo_handle(struct exynos_bo *bo)
+{
+ return bo->handle;
+}
+
+/*
+ * Mmap a buffer to user space.
+ *
+ * @bo: a exynos buffer object including a gem object handle to be mmapped
+ * to user space.
+ *
+ * if true, user pointer mmapped else NULL.
+ */
+drm_public void *exynos_bo_map(struct exynos_bo *bo)
+{
+ if (!bo->vaddr) {
+ struct exynos_device *dev = bo->dev;
+ struct drm_mode_map_dumb arg;
+ void *map = NULL;
+ int ret;
+
+ memset(&arg, 0, sizeof(arg));
+ arg.handle = bo->handle;
+
+ ret = drmIoctl(dev->fd, DRM_IOCTL_MODE_MAP_DUMB, &arg);
+ if (ret) {
+ fprintf(stderr, "failed to map dumb buffer[%s].\n",
+ strerror(errno));
+ return NULL;
+ }
+
+ map = drm_mmap(0, bo->size, PROT_READ | PROT_WRITE, MAP_SHARED,
+ dev->fd, arg.offset);
+
+ if (map != MAP_FAILED)
+ bo->vaddr = map;
+ }
+
+ return bo->vaddr;
+}
+
+/*
+ * Export gem object to dmabuf as file descriptor.
+ *
+ * @dev: exynos device object
+ * @handle: gem handle to export as file descriptor of dmabuf
+ * @fd: file descriptor returned from kernel
+ *
+ * @return: 0 on success, -1 on error, and errno will be set
+ */
+drm_public int
+exynos_prime_handle_to_fd(struct exynos_device *dev, uint32_t handle, int *fd)
+{
+ return drmPrimeHandleToFD(dev->fd, handle, 0, fd);
+}
+
+/*
+ * Import file descriptor into gem handle.
+ *
+ * @dev: exynos device object
+ * @fd: file descriptor of dmabuf to import
+ * @handle: gem handle returned from kernel
+ *
+ * @return: 0 on success, -1 on error, and errno will be set
+ */
+drm_public int
+exynos_prime_fd_to_handle(struct exynos_device *dev, int fd, uint32_t *handle)
+{
+ return drmPrimeFDToHandle(dev->fd, fd, handle);
+}
+
+
+
+/*
+ * Request Wireless Display connection or disconnection.
+ *
+ * @dev: a exynos device object.
+ * @connect: indicate whether connectoin or disconnection request.
+ * @ext: indicate whether edid data includes extensions data or not.
+ * @edid: a pointer to edid data from Wireless Display device.
+ *
+ * this interface is used to request Virtual Display driver connection or
+ * disconnection. for this, user should get a edid data from the Wireless
+ * Display device and then send that data to kernel driver with connection
+ * request
+ *
+ * if true, return 0 else negative.
+ */
+drm_public int
+exynos_vidi_connection(struct exynos_device *dev, uint32_t connect,
+ uint32_t ext, void *edid)
+{
+ struct drm_exynos_vidi_connection req = {
+ .connection = connect,
+ .extensions = ext,
+ .edid = (uint64_t)(uintptr_t)edid,
+ };
+ int ret;
+
+ ret = drmIoctl(dev->fd, DRM_IOCTL_EXYNOS_VIDI_CONNECTION, &req);
+ if (ret) {
+ fprintf(stderr, "failed to request vidi connection[%s].\n",
+ strerror(errno));
+ return ret;
+ }
+
+ return 0;
+}
+
+static void
+exynos_handle_vendor(int fd, struct drm_event *e, void *ctx)
+{
+ struct drm_exynos_g2d_event *g2d;
+ struct exynos_event_context *ectx = ctx;
+
+ switch (e->type) {
+ case DRM_EXYNOS_G2D_EVENT:
+ if (ectx->version < 1 || ectx->g2d_event_handler == NULL)
+ break;
+ g2d = (struct drm_exynos_g2d_event *)e;
+ ectx->g2d_event_handler(fd, g2d->cmdlist_no, g2d->tv_sec,
+ g2d->tv_usec, U642VOID(g2d->user_data));
+ break;
+
+ default:
+ break;
+ }
+}
+
+drm_public int
+exynos_handle_event(struct exynos_device *dev, struct exynos_event_context *ctx)
+{
+ char buffer[1024];
+ int len, i;
+ struct drm_event *e;
+ struct drm_event_vblank *vblank;
+ drmEventContextPtr evctx = &ctx->base;
+
+ /* The DRM read semantics guarantees that we always get only
+ * complete events. */
+ len = read(dev->fd, buffer, sizeof buffer);
+ if (len == 0)
+ return 0;
+ if (len < (int)sizeof *e)
+ return -1;
+
+ i = 0;
+ while (i < len) {
+ e = (struct drm_event *)(buffer + i);
+ switch (e->type) {
+ case DRM_EVENT_VBLANK:
+ if (evctx->version < 1 ||
+ evctx->vblank_handler == NULL)
+ break;
+ vblank = (struct drm_event_vblank *) e;
+ evctx->vblank_handler(dev->fd,
+ vblank->sequence,
+ vblank->tv_sec,
+ vblank->tv_usec,
+ U642VOID (vblank->user_data));
+ break;
+ case DRM_EVENT_FLIP_COMPLETE:
+ if (evctx->version < 2 ||
+ evctx->page_flip_handler == NULL)
+ break;
+ vblank = (struct drm_event_vblank *) e;
+ evctx->page_flip_handler(dev->fd,
+ vblank->sequence,
+ vblank->tv_sec,
+ vblank->tv_usec,
+ U642VOID (vblank->user_data));
+ break;
+ default:
+ exynos_handle_vendor(dev->fd, e, evctx);
+ break;
+ }
+ i += e->length;
+ }
+
+ return 0;
+}