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backend_kms.c
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backend_kms.c
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/*
* Copyright (c) 2013 Renesas Solutions Corp.
*
* 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:
* Takanari Hayama <[email protected]>
*/
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <stdint.h>
#include <string.h>
#include <limits.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <dlfcn.h>
#include <xf86drm.h>
#include <libkms.h>
#include <errno.h>
#include <wayland-kms.h>
#include "gbmint.h"
#include "common_drm.h"
#include "gbm_kmsint.h"
#if defined(DEBUG)
# define GBM_DEBUG(s, x...) { printf(s, ## x); }
#else
# define GBM_DEBUG(s, x...) { }
#endif
/*
* Destroy gbm backend
*/
static void gbm_kms_destroy(struct gbm_device *gbm)
{
free(gbm);
}
/*
* Check if the given format is supported
*
* Weston requires GBM_FORMAT_XRGB8888 only for now.
*/
static int gbm_kms_is_format_supported(struct gbm_device *gbm,
uint32_t format, uint32_t usage)
{
switch (format) {
// 32bpp
case GBM_FORMAT_ARGB8888:
case GBM_BO_FORMAT_ARGB8888:
case GBM_FORMAT_XRGB8888:
case GBM_BO_FORMAT_XRGB8888:
return 1;
default:
return 0;
}
}
static void gbm_kms_bo_destroy(struct gbm_bo *_bo)
{
struct gbm_kms_bo *bo = (struct gbm_kms_bo*)_bo;
if (!bo)
return;
if (bo->allocated) {
if (bo->addr)
kms_bo_unmap(bo->bo);
if (bo->fd)
close(bo->fd);
if (bo->bo)
kms_bo_destroy(&bo->bo);
}
free(bo);
return;
}
static struct gbm_bo *gbm_kms_bo_create(struct gbm_device *gbm,
uint32_t width, uint32_t height,
uint32_t format, uint32_t usage)
{
struct gbm_kms_device *dev = (struct gbm_kms_device*)gbm;
struct gbm_kms_bo *bo;
unsigned attr[] = {
KMS_BO_TYPE, KMS_BO_TYPE_SCANOUT_X8R8G8B8,
KMS_WIDTH, 0,
KMS_HEIGHT, 0,
KMS_TERMINATE_PROP_LIST
};
GBM_DEBUG("%s: %s: %d\n", __FILE__, __func__, __LINE__);
if (!(bo = calloc(1, sizeof(struct gbm_kms_bo))))
return NULL;
switch (format) {
// 32bpp
case GBM_FORMAT_ARGB8888:
case GBM_BO_FORMAT_ARGB8888:
case GBM_FORMAT_XRGB8888:
case GBM_BO_FORMAT_XRGB8888:
break;
default:
// unsupported...
goto error;
}
if (usage & (uint32_t)GBM_BO_USE_CURSOR_64X64)
attr[1] = KMS_BO_TYPE_CURSOR_64X64_A8R8G8B8;
attr[3] = width;
attr[5] = height;
// Create BO
if (kms_bo_create(dev->kms, attr, &bo->bo))
goto error;
bo->base.gbm = gbm;
bo->base.width = width;
bo->base.height = height;
bo->base.format = format;
kms_bo_get_prop(bo->bo, KMS_HANDLE, &bo->base.handle.u32);
kms_bo_get_prop(bo->bo, KMS_PITCH, &bo->base.stride);
bo->size = bo->base.stride * bo->base.height;
bo->allocated = true;
if (drmPrimeHandleToFD(dev->base.base.fd, bo->base.handle.u32, DRM_CLOEXEC, &bo->fd)) {
GBM_DEBUG("%s: %s: drmPrimeHandleToFD() failed. %s\n", __FILE__, __func__, strerror(errno));
goto error;
}
// Map to the user space for bo_write
if (usage & (uint32_t)GBM_BO_USE_WRITE) {
if (kms_bo_map(bo->bo, &bo->addr))
goto error;
}
return (struct gbm_bo*)bo;
error:
GBM_DEBUG("%s: %s: %d: ERROR!!!!\n", __FILE__, __func__, __LINE__);
gbm_kms_bo_destroy((struct gbm_bo*)bo);
return NULL;
}
static int gbm_kms_bo_write(struct gbm_bo *_bo, const void *buf, size_t count)
{
struct gbm_kms_bo *bo = (struct gbm_kms_bo*)_bo;
if (!bo->addr)
return -1;
memcpy(bo->addr, buf, count);
return 0;
}
static struct gbm_kms_bo* gbm_kms_import_wl_buffer(struct gbm_device *gbm,
void *_buffer)
{
struct wl_kms_buffer *buffer;
struct gbm_kms_bo *bo;
buffer = wayland_kms_buffer_get((struct wl_resource*)_buffer);
if (!buffer)
return NULL;
// XXX: BO handle is imported in wayland-kms.
if (!(bo = calloc(1, sizeof(struct gbm_kms_bo))))
return NULL;
bo->base.gbm = gbm;
bo->base.width = buffer->width;
bo->base.height = buffer->height;
bo->base.format = buffer->format;
bo->base.stride = buffer->stride;
bo->base.handle.u32 = buffer->handle;
if (buffer->num_planes > 0 && buffer->num_planes <= MAX_PLANES) {
int i;
bo->num_planes = buffer->num_planes;
for (i = 0; i < buffer->num_planes; i++) {
bo->planes[i].handle = buffer->planes[i].handle;
bo->planes[i].stride = buffer->planes[i].stride;
}
} else {
bo->num_planes = 1;
}
return bo;
}
static struct gbm_kms_bo* gbm_kms_import_fd(struct gbm_device *gbm,
void *_buffer)
{
struct gbm_import_fd_data *fd_data = _buffer;
struct gbm_kms_device *dev = (struct gbm_kms_device*)gbm;
struct gbm_kms_bo *bo;
uint32_t handle;
if (drmPrimeFDToHandle(dev->base.base.fd, fd_data->fd, &handle)) {
GBM_DEBUG("%s: %s: drmPrimeFDToHandle() failed. %s\n",
__FILE__, __func__, strerror(errno));
return NULL;
}
// XXX: BO handle is imported in wayland-kms.
if (!(bo = calloc(1, sizeof(struct gbm_kms_bo))))
return NULL;
bo->base.gbm = gbm;
bo->base.width = fd_data->width;
bo->base.height = fd_data->height;
bo->base.format = fd_data->format;
bo->base.stride = fd_data->stride;
bo->base.handle.u32 = handle;
bo->num_planes = 1;
return bo;
}
static struct gbm_bo *gbm_kms_bo_import(struct gbm_device *gbm,
uint32_t type, void *_buffer,
uint32_t usage)
{
struct gbm_kms_bo *bo = NULL;
/*
* We need to import wl_buffer/gbm_import_fd_data for Weston,
* i.e. client's rendering buffer.
*
* To make gbm_kms backend to be agnostic to none-DRM/KMS as much as
* possible, wl_buffer that we receive must be DRM BO, nothing else.
* We are already kind of wayland dependent which is enough.
*/
switch (type) {
case GBM_BO_IMPORT_WL_BUFFER:
bo = gbm_kms_import_wl_buffer(gbm, _buffer);
break;
case GBM_BO_IMPORT_FD:
bo = gbm_kms_import_fd(gbm, _buffer);
break;
default:
GBM_DEBUG("%s: invalid type = %d\n", __func__, type);
break;
}
return (struct gbm_bo*)bo;
}
static int gbm_kms_surface_set_bo(struct gbm_kms_surface *surface, int n, void *addr, int fd, uint32_t stride)
{
struct gbm_kms_bo *bo;
if (n < 0 || n > 1)
return -1;
if (surface->bo[n])
free(surface->bo[n]);
if (addr == NULL && stride == 0)
return 0;
if (!(bo = calloc(1, sizeof(struct gbm_kms_bo))))
return -1;
bo->base.gbm = surface->base.gbm;
bo->base.width = surface->base.width;
bo->base.height = surface->base.height;
bo->base.format = surface->base.format;
bo->base.stride = stride;
bo->size = stride * surface->base.height;
bo->addr = addr;
bo->fd = fd;
bo->allocated = false;
surface->bo[n] = bo;
return 0;
}
static void gbm_kms_surface_destroy(struct gbm_surface *_surface);
static struct gbm_surface *gbm_kms_surface_create(struct gbm_device *gbm,
uint32_t width,
uint32_t height,
uint32_t format,
uint32_t flags)
{
struct gbm_kms_surface *surface;
GBM_DEBUG("%s: %s: %d\n", __FILE__, __func__, __LINE__);
if (!(surface = calloc(1, sizeof(struct gbm_kms_surface))))
return NULL;
surface->base.gbm = gbm;
surface->base.width = width;
surface->base.height = height;
surface->base.format = format;
surface->base.flags = flags;
GBM_DEBUG("%s: %s: %d: created surface %dx%d\n", __FILE__, __func__, __LINE__, width, height);
surface->front = -1;
surface->set_bo = gbm_kms_surface_set_bo;
return (struct gbm_surface*)surface;
}
static void gbm_kms_surface_destroy(struct gbm_surface *_surface)
{
struct gbm_kms_surface *surface = (struct gbm_kms_surface*)_surface;
if (!surface)
return;
free(surface);
}
static struct gbm_bo *gbm_kms_surface_lock_front_buffer(struct gbm_surface *_surface)
{
struct gbm_kms_surface *surface = (struct gbm_kms_surface*)_surface;
/*
* Drm-compositor in the weston server relies on this API. After
* composing clients' surfaces with gl-renderer, drm-compositor locks
* the gbm_surface and queries BO attached to it with this API.
* Drm-compositor then sets it to DRM/KMS with drmModeAddFB() and
* drmModeAddFB2().
*/
if (surface->front >= 0) {
struct gbm_kms_bo *front = surface->bo[surface->front];
front->locked = 1;
return (struct gbm_bo*)front;
}
return NULL;
}
static void gbm_kms_surface_release_buffer(struct gbm_surface *_surface, struct gbm_bo *_bo)
{
struct gbm_kms_bo *bo = (struct gbm_kms_bo*)_bo;
bo->locked = 0;
return;
}
static int gbm_kms_surface_has_free_buffers(struct gbm_surface *_surface)
{
struct gbm_kms_surface *surface = (struct gbm_kms_surface*)_surface;
return ((!surface->bo[0]->locked) || (!surface->bo[1]->locked));
}
struct gbm_device kms_gbm_device = {
.name = "kms",
.destroy = gbm_kms_destroy,
.is_format_supported = gbm_kms_is_format_supported,
.bo_create = gbm_kms_bo_create,
.bo_import = gbm_kms_bo_import,
.bo_write = gbm_kms_bo_write,
.bo_destroy = gbm_kms_bo_destroy,
.surface_create = gbm_kms_surface_create,
.surface_lock_front_buffer = gbm_kms_surface_lock_front_buffer,
.surface_release_buffer = gbm_kms_surface_release_buffer,
.surface_has_free_buffers = gbm_kms_surface_has_free_buffers,
.surface_destroy = gbm_kms_surface_destroy,
};
static struct gbm_device *kms_device_create(int fd)
{
struct gbm_kms_device *dev;
GBM_DEBUG("%s: %d\n", __func__, __LINE__);
if (!(dev = calloc(1, sizeof(struct gbm_kms_device))))
return NULL;
dev->base.type = GBM_DRM_DRIVER_TYPE_CUSTOM;
dev->base.base = kms_gbm_device;
dev->base.base.fd = fd;
if (kms_create(fd, &dev->kms)) {
free(dev);
return NULL;
}
return &dev->base.base;
}
/* backend loader looks for symbol "gbm_backend" */
struct gbm_backend gbm_backend = {
.backend_name = "kms",
.create_device = kms_device_create,
};