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kmsallocator: Port to the new DRM Dumb Allocator
This ports the KMS allocator to use the DRM Dumb allocator from the allocators library. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3801>
This commit is contained in:
Nicolas Dufresne
GStreamer Marge Bot
parent
7c7f2bb6df
commit
37f2d2ac42
2 changed files with 85 additions and 158 deletions
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@ -38,6 +38,7 @@
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#include <drm.h>
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#include <gst/allocators/gstdmabuf.h>
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#include <gst/allocators/gstdrmdumb.h>
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#include "gstkmsallocator.h"
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#include "gstkmsutils.h"
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@ -51,20 +52,12 @@ GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
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#define GST_KMS_MEMORY_TYPE "KMSMemory"
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struct kms_bo
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{
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void *ptr;
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size_t size;
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unsigned handle;
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unsigned int refs;
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};
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struct _GstKMSAllocatorPrivate
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{
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int fd;
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/* protected by GstKMSAllocator object lock */
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GList *mem_cache;
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GstAllocator *dmabuf_alloc;
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GstAllocator *dumb_alloc;
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};
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#define parent_class gst_kms_allocator_parent_class
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@ -101,92 +94,40 @@ check_fd (GstKMSAllocator * alloc)
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return alloc->priv->fd > -1;
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}
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static void
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gst_kms_allocator_memory_reset (GstKMSAllocator * allocator, GstKMSMemory * mem)
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{
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int err;
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struct drm_mode_destroy_dumb arg = { 0, };
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if (!check_fd (allocator))
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return;
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if (mem->fb_id) {
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GST_DEBUG_OBJECT (allocator, "removing fb id %d", mem->fb_id);
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drmModeRmFB (allocator->priv->fd, mem->fb_id);
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mem->fb_id = 0;
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}
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if (!mem->bo)
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return;
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if (mem->bo->ptr != NULL) {
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GST_WARNING_OBJECT (allocator, "destroying mapped bo (refcount=%d)",
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mem->bo->refs);
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munmap (mem->bo->ptr, mem->bo->size);
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mem->bo->ptr = NULL;
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}
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arg.handle = mem->bo->handle;
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err = drmIoctl (allocator->priv->fd, DRM_IOCTL_MODE_DESTROY_DUMB, &arg);
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if (err)
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GST_WARNING_OBJECT (allocator,
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"Failed to destroy dumb buffer object: %s %d",
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g_strerror (errno), errno);
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g_free (mem->bo);
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mem->bo = NULL;
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}
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static gboolean
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gst_kms_allocator_memory_create (GstKMSAllocator * allocator,
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GstKMSMemory * kmsmem, GstVideoInfo * vinfo)
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{
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gint i, ret, h;
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struct drm_mode_create_dumb arg = { 0, };
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guint32 fmt;
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gint i, h;
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gint num_planes = GST_VIDEO_INFO_N_PLANES (vinfo);
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gsize offs = 0;
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guint32 pitch;
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if (kmsmem->bo)
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return TRUE;
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if (!check_fd (allocator))
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return FALSE;
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kmsmem->bo = g_malloc0 (sizeof (*kmsmem->bo));
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kmsmem->bo = gst_drm_dumb_allocator_alloc (allocator->priv->dumb_alloc,
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gst_drm_format_from_video (GST_VIDEO_INFO_FORMAT (vinfo)),
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GST_VIDEO_INFO_WIDTH (vinfo), GST_VIDEO_INFO_HEIGHT (vinfo), &pitch);
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if (!kmsmem->bo)
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return FALSE;
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fmt = gst_drm_format_from_video (GST_VIDEO_INFO_FORMAT (vinfo));
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arg.bpp = gst_drm_bpp_from_drm (fmt);
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arg.width = GST_VIDEO_INFO_WIDTH (vinfo);
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h = GST_VIDEO_INFO_HEIGHT (vinfo);
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arg.height = gst_drm_height_from_drm (fmt, h);
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ret = drmIoctl (allocator->priv->fd, DRM_IOCTL_MODE_CREATE_DUMB, &arg);
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if (ret)
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goto create_failed;
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if (!arg.pitch)
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if (!pitch)
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goto done;
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h = GST_VIDEO_INFO_HEIGHT (vinfo);
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for (i = 0; i < num_planes; i++) {
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guint32 pitch;
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if (!arg.pitch)
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continue;
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guint32 stride;
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/* Overwrite the video info's stride and offset using the pitch calculcated
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* by the kms driver. */
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pitch = gst_video_format_info_extrapolate_stride (vinfo->finfo, i,
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arg.pitch);
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stride = gst_video_format_info_extrapolate_stride (vinfo->finfo, i, pitch);
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GST_VIDEO_INFO_PLANE_STRIDE (vinfo, i) = pitch;
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GST_VIDEO_INFO_PLANE_OFFSET (vinfo, i) = offs;
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/* Note that we cannot negotiate special padding betweem each planes,
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* hence using the display height here. */
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offs += pitch * GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (vinfo->finfo, i, h);
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offs += stride * GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (vinfo->finfo, i, h);
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GST_DEBUG_OBJECT (allocator, "Created BO plane %i with stride %i and "
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"offset %" G_GSIZE_FORMAT, i,
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@ -198,10 +139,6 @@ gst_kms_allocator_memory_create (GstKMSAllocator * allocator,
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GST_VIDEO_INFO_SIZE (vinfo) = offs;
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done:
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kmsmem->bo->handle = arg.handle;
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/* will be used a memory maxsize */
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kmsmem->bo->size = arg.size;
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/* Validate the size to prevent overflow */
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if (kmsmem->bo->size < GST_VIDEO_INFO_SIZE (vinfo)) {
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GST_ERROR_OBJECT (allocator,
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@ -218,8 +155,6 @@ create_failed:
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{
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GST_ERROR_OBJECT (allocator, "Failed to create buffer object: %s (%d)",
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g_strerror (errno), errno);
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g_free (kmsmem->bo);
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kmsmem->bo = NULL;
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return FALSE;
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}
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}
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@ -233,7 +168,17 @@ gst_kms_allocator_free (GstAllocator * allocator, GstMemory * mem)
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alloc = GST_KMS_ALLOCATOR (allocator);
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kmsmem = (GstKMSMemory *) mem;
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gst_kms_allocator_memory_reset (alloc, kmsmem);
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if (check_fd (alloc) && kmsmem->fb_id) {
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GST_DEBUG_OBJECT (allocator, "removing fb id %d", kmsmem->fb_id);
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drmModeRmFB (alloc->priv->fd, kmsmem->fb_id);
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kmsmem->fb_id = 0;
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}
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if (kmsmem->bo) {
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gst_memory_unref (kmsmem->bo);
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kmsmem->bo = NULL;
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}
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g_free (kmsmem);
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}
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@ -276,6 +221,22 @@ gst_kms_allocator_get_property (GObject * object, guint prop_id,
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}
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}
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static void
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gst_kms_allocator_constructed (GObject * obj)
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{
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GstKMSAllocator *alloc;
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alloc = GST_KMS_ALLOCATOR (obj);
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/* Should be called after the properties are set */
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g_assert (check_fd (alloc));
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alloc->priv->dumb_alloc =
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gst_drm_dumb_allocator_new_with_fd (alloc->priv->fd);
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/* Its already opened and we already checked for dumb allocation support */
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g_assert (alloc->priv->dumb_alloc);
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}
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static void
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gst_kms_allocator_finalize (GObject * obj)
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{
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@ -285,8 +246,8 @@ gst_kms_allocator_finalize (GObject * obj)
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gst_kms_allocator_clear_cache (GST_ALLOCATOR (alloc));
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if (alloc->priv->dmabuf_alloc)
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gst_object_unref (alloc->priv->dmabuf_alloc);
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if (alloc->priv->dumb_alloc)
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gst_object_unref (alloc->priv->dumb_alloc);
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if (check_fd (alloc))
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close (alloc->priv->fd);
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@ -307,11 +268,12 @@ gst_kms_allocator_class_init (GstKMSAllocatorClass * klass)
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gobject_class->set_property = gst_kms_allocator_set_property;
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gobject_class->get_property = gst_kms_allocator_get_property;
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gobject_class->constructed = gst_kms_allocator_constructed;
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gobject_class->finalize = gst_kms_allocator_finalize;
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g_props[PROP_DRM_FD] = g_param_spec_int ("drm-fd", "DRM fd",
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"DRM file descriptor", -1, G_MAXINT, -1,
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G_PARAM_READWRITE | G_PARAM_CONSTRUCT);
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G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY);
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g_object_class_install_properties (gobject_class, PROP_N, g_props);
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}
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@ -320,46 +282,20 @@ static gpointer
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gst_kms_memory_map (GstMemory * mem, gsize maxsize, GstMapFlags flags)
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{
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GstKMSMemory *kmsmem;
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GstKMSAllocator *alloc;
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int err;
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gpointer out;
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struct drm_mode_map_dumb arg = { 0, };
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alloc = (GstKMSAllocator *) mem->allocator;
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if (!check_fd (alloc))
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return NULL;
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kmsmem = (GstKMSMemory *) mem;
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if (!kmsmem->bo)
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return NULL;
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/* Reuse existing buffer object mapping if possible */
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if (kmsmem->bo->ptr != NULL) {
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if (kmsmem->bo_map.data)
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goto out;
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}
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arg.handle = kmsmem->bo->handle;
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err = drmIoctl (alloc->priv->fd, DRM_IOCTL_MODE_MAP_DUMB, &arg);
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if (err) {
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GST_ERROR_OBJECT (alloc, "Failed to get offset of buffer object: %s %d",
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g_strerror (errno), errno);
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if (!gst_memory_map (kmsmem->bo, &kmsmem->bo_map, flags))
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return NULL;
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}
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out = mmap (0, kmsmem->bo->size,
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PROT_READ | PROT_WRITE, MAP_SHARED, alloc->priv->fd, arg.offset);
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if (out == MAP_FAILED) {
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GST_ERROR_OBJECT (alloc, "Failed to map dumb buffer object: %s %d",
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g_strerror (errno), errno);
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return NULL;
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}
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kmsmem->bo->ptr = out;
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out:
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g_atomic_int_inc (&kmsmem->bo->refs);
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return kmsmem->bo->ptr;
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g_atomic_int_inc (&kmsmem->bo_map_refs);
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return kmsmem->bo_map.data;
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}
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static void
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@ -367,16 +303,13 @@ gst_kms_memory_unmap (GstMemory * mem)
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{
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GstKMSMemory *kmsmem;
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if (!check_fd ((GstKMSAllocator *) mem->allocator))
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return;
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kmsmem = (GstKMSMemory *) mem;
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if (!kmsmem->bo)
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return;
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if (g_atomic_int_dec_and_test (&kmsmem->bo->refs)) {
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munmap (kmsmem->bo->ptr, kmsmem->bo->size);
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kmsmem->bo->ptr = NULL;
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if (g_atomic_int_dec_and_test (&kmsmem->bo_map_refs)) {
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gst_memory_unmap (kmsmem->bo, &kmsmem->bo_map);
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kmsmem->bo_map.data = NULL;
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}
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}
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@ -414,11 +347,12 @@ gst_kms_allocator_new (int fd)
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* which are relative to the GstBuffer start. */
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static gboolean
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gst_kms_allocator_add_fb (GstKMSAllocator * alloc, GstKMSMemory * kmsmem,
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gsize in_offsets[GST_VIDEO_MAX_PLANES], GstVideoInfo * vinfo)
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gsize in_offsets[GST_VIDEO_MAX_PLANES], GstVideoInfo * vinfo,
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guint32 bo_handles[4])
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{
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gint i, ret;
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gint num_planes = GST_VIDEO_INFO_N_PLANES (vinfo);
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guint32 w, h, fmt, bo_handles[4] = { 0, };
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guint32 w, h, fmt;
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guint32 pitches[4] = { 0, };
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guint32 offsets[4] = { 0, };
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@ -430,11 +364,6 @@ gst_kms_allocator_add_fb (GstKMSAllocator * alloc, GstKMSMemory * kmsmem,
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fmt = gst_drm_format_from_video (GST_VIDEO_INFO_FORMAT (vinfo));
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for (i = 0; i < num_planes; i++) {
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if (kmsmem->bo)
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bo_handles[i] = kmsmem->bo->handle;
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else
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bo_handles[i] = kmsmem->gem_handle[i];
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pitches[i] = GST_VIDEO_INFO_PLANE_STRIDE (vinfo, i);
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offsets[i] = in_offsets[i];
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}
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@ -459,6 +388,8 @@ gst_kms_allocator_bo_alloc (GstAllocator * allocator, GstVideoInfo * vinfo)
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GstKMSAllocator *alloc;
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GstKMSMemory *kmsmem;
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GstMemory *mem;
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guint32 bo_handle[4] = { 0, };
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gint i;
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kmsmem = g_new0 (GstKMSMemory, 1);
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@ -472,9 +403,13 @@ gst_kms_allocator_bo_alloc (GstAllocator * allocator, GstVideoInfo * vinfo)
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}
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gst_memory_init (mem, GST_MEMORY_FLAG_NO_SHARE, allocator, NULL,
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kmsmem->bo->size, 0, 0, GST_VIDEO_INFO_SIZE (vinfo));
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kmsmem->bo->maxsize, 0, 0, GST_VIDEO_INFO_SIZE (vinfo));
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if (!gst_kms_allocator_add_fb (alloc, kmsmem, vinfo->offset, vinfo))
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for (i = 0; i < GST_VIDEO_INFO_N_PLANES (vinfo); i++)
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bo_handle[i] = gst_drm_dumb_memory_get_handle (kmsmem->bo);
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if (!gst_kms_allocator_add_fb (alloc, kmsmem, vinfo->offset, vinfo,
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bo_handle))
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goto fail;
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return mem;
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@ -493,6 +428,7 @@ gst_kms_allocator_dmabuf_import (GstAllocator * allocator, gint * prime_fds,
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GstKMSMemory *kmsmem;
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GstMemory *mem;
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gint i, ret;
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guint32 gem_handle[4] = { 0, };
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g_return_val_if_fail (n_planes <= GST_VIDEO_MAX_PLANES, FALSE);
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@ -504,42 +440,41 @@ gst_kms_allocator_dmabuf_import (GstAllocator * allocator, gint * prime_fds,
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alloc = GST_KMS_ALLOCATOR (allocator);
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for (i = 0; i < n_planes; i++) {
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ret = drmPrimeFDToHandle (alloc->priv->fd, prime_fds[i],
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&kmsmem->gem_handle[i]);
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ret = drmPrimeFDToHandle (alloc->priv->fd, prime_fds[i], &gem_handle[i]);
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if (ret)
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goto import_fd_failed;
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}
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if (!gst_kms_allocator_add_fb (alloc, kmsmem, offsets, vinfo))
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if (!gst_kms_allocator_add_fb (alloc, kmsmem, offsets, vinfo, gem_handle))
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goto failed;
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done:
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for (i = 0; i < n_planes; i++) {
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struct drm_gem_close arg = { kmsmem->gem_handle[i], };
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struct drm_gem_close arg = { gem_handle[i], };
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gint err;
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if (!gem_handle[i])
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continue;
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err = drmIoctl (alloc->priv->fd, DRM_IOCTL_GEM_CLOSE, &arg);
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if (err)
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GST_WARNING_OBJECT (allocator,
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"Failed to close GEM handle: %s %d", g_strerror (errno), errno);
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kmsmem->gem_handle[i] = 0;
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}
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return kmsmem;
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/* ERRORS */
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import_fd_failed:
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{
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GST_ERROR_OBJECT (alloc, "Failed to import prime fd %d: %s (%d)",
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prime_fds[i], g_strerror (errno), errno);
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/* fallback */
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}
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GST_ERROR_OBJECT (alloc, "Failed to import prime fd %d: %s (%d)",
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prime_fds[i], g_strerror (errno), errno);
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/* fallthrough */
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failed:
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{
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gst_memory_unref (mem);
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return NULL;
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}
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gst_memory_unref (mem);
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mem = NULL;
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kmsmem = NULL;
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goto done;
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}
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GstMemory *
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@ -548,30 +483,21 @@ gst_kms_allocator_dmabuf_export (GstAllocator * allocator, GstMemory * _kmsmem)
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GstKMSMemory *kmsmem = (GstKMSMemory *) _kmsmem;
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GstKMSAllocator *alloc = GST_KMS_ALLOCATOR (allocator);
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GstMemory *mem;
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gint ret;
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gint prime_fd;
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/* We can only export DUMB buffers */
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g_return_val_if_fail (kmsmem->bo, NULL);
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ret = drmPrimeHandleToFD (alloc->priv->fd, kmsmem->bo->handle,
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DRM_CLOEXEC | DRM_RDWR, &prime_fd);
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if (ret)
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mem = gst_drm_dumb_memory_export_dmabuf (kmsmem->bo);
|
||||
if (!mem)
|
||||
goto export_fd_failed;
|
||||
|
||||
if (G_UNLIKELY (alloc->priv->dmabuf_alloc == NULL))
|
||||
alloc->priv->dmabuf_alloc = gst_dmabuf_allocator_new ();
|
||||
|
||||
mem = gst_dmabuf_allocator_alloc (alloc->priv->dmabuf_alloc, prime_fd,
|
||||
gst_memory_get_sizes (_kmsmem, NULL, NULL));
|
||||
|
||||
/* Populate the cache so KMSSink can find the kmsmem back when it receives
|
||||
* one of these DMABuf. This call takes ownership of the kmsmem. */
|
||||
gst_kms_allocator_cache (allocator, mem, _kmsmem);
|
||||
|
||||
GST_DEBUG_OBJECT (alloc, "Exported bo handle %d as %d", kmsmem->bo->handle,
|
||||
prime_fd);
|
||||
GST_DEBUG_OBJECT (alloc, "Exported bo handle %d as %d",
|
||||
gst_drm_dumb_memory_get_handle (kmsmem->bo),
|
||||
gst_dmabuf_memory_get_fd (mem));
|
||||
|
||||
return mem;
|
||||
|
||||
|
|
@ -579,7 +505,7 @@ gst_kms_allocator_dmabuf_export (GstAllocator * allocator, GstMemory * _kmsmem)
|
|||
export_fd_failed:
|
||||
{
|
||||
GST_ERROR_OBJECT (alloc, "Failed to export bo handle %d: %s (%d)",
|
||||
kmsmem->bo->handle, g_strerror (errno), ret);
|
||||
gst_drm_dumb_memory_get_handle (kmsmem->bo), g_strerror (errno), errno);
|
||||
return NULL;
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -56,8 +56,9 @@ struct _GstKMSMemory
|
|||
GstMemory parent;
|
||||
|
||||
guint32 fb_id;
|
||||
guint32 gem_handle[GST_VIDEO_MAX_PLANES];
|
||||
struct kms_bo *bo;
|
||||
GstMemory *bo;
|
||||
GstMapInfo bo_map;
|
||||
gint bo_map_refs;
|
||||
};
|
||||
|
||||
struct _GstKMSAllocator
|
||||
|
|
|
|||
Loading…
Reference in a new issue