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virglrenderer/src/vrend_winsys_gbm.c

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/**************************************************************************
*
* Copyright (C) 2019 Chromium.
*
* 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 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.
*
**************************************************************************/
#ifndef _GNU_SOURCE
#define _GNU_SOURCE 1
#endif
#include <stdio.h>
#include <dirent.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <xf86drm.h>
#include <unistd.h>
#include "util/u_math.h"
#include "util/u_memory.h"
#include "pipe/p_state.h"
#include "vrend_winsys.h"
#include "vrend_winsys_gbm.h"
#include "virgl_hw.h"
#include "vrend_debug.h"
struct planar_layout {
size_t num_planes;
int horizontal_subsampling[VIRGL_GBM_MAX_PLANES];
int vertical_subsampling[VIRGL_GBM_MAX_PLANES];
int bytes_per_pixel[VIRGL_GBM_MAX_PLANES];
};
struct format_conversion {
uint32_t gbm_format;
uint32_t virgl_format;
};
static const struct planar_layout packed_1bpp_layout = {
.num_planes = 1,
.horizontal_subsampling = { 1 },
.vertical_subsampling = { 1 },
.bytes_per_pixel = { 1 }
};
static const struct planar_layout packed_2bpp_layout = {
.num_planes = 1,
.horizontal_subsampling = { 1 },
.vertical_subsampling = { 1 },
.bytes_per_pixel = { 2 }
};
static const struct planar_layout packed_4bpp_layout = {
.num_planes = 1,
.horizontal_subsampling = { 1 },
.vertical_subsampling = { 1 },
.bytes_per_pixel = { 4 }
};
static const struct planar_layout packed_8bpp_layout = {
.num_planes = 1,
.horizontal_subsampling = { 1 },
.vertical_subsampling = { 1 },
.bytes_per_pixel = { 8 }
};
static const struct planar_layout biplanar_yuv_420_layout = {
.num_planes = 2,
.horizontal_subsampling = { 1, 2 },
.vertical_subsampling = { 1, 2 },
.bytes_per_pixel = { 1, 2 }
};
static const struct planar_layout triplanar_yuv_420_layout = {
.num_planes = 3,
.horizontal_subsampling = { 1, 2, 2 },
.vertical_subsampling = { 1, 2, 2 },
.bytes_per_pixel = { 1, 1, 1 }
};
static const struct format_conversion conversions[] = {
{ GBM_FORMAT_RGB565, VIRGL_FORMAT_B5G6R5_UNORM },
{ GBM_FORMAT_ABGR8888, VIRGL_FORMAT_B8G8R8A8_UNORM },
{ GBM_FORMAT_XBGR8888, VIRGL_FORMAT_B8G8R8X8_UNORM },
{ GBM_FORMAT_ABGR2101010, VIRGL_FORMAT_R10G10B10A2_UNORM },
{ GBM_FORMAT_ABGR16161616F, VIRGL_FORMAT_R16G16B16A16_FLOAT },
{ GBM_FORMAT_NV12, VIRGL_FORMAT_NV12 },
{ GBM_FORMAT_ABGR8888, VIRGL_FORMAT_R8G8B8A8_UNORM},
{ GBM_FORMAT_XBGR8888, VIRGL_FORMAT_R8G8B8X8_UNORM},
{ GBM_FORMAT_R8, VIRGL_FORMAT_R8_UNORM},
{ GBM_FORMAT_YVU420, VIRGL_FORMAT_YV12},
};
static int rendernode_open(void)
{
DIR *dir;
int ret, fd;
bool undesired_found;
drmVersionPtr version;
char *rendernode_name;
struct dirent *dir_ent;
const char *undesired[3] = { "vgem", "pvr", NULL };
dir = opendir("/dev/dri");
if (!dir)
return -1;
fd = -1;
while ((dir_ent = readdir(dir))) {
if (dir_ent->d_type != DT_CHR)
continue;
if (strncmp(dir_ent->d_name, "renderD", 7))
continue;
ret = asprintf(&rendernode_name, "/dev/dri/%s", dir_ent->d_name);
if (ret < 0)
goto out;
fd = open(rendernode_name, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK);
free(rendernode_name);
if (fd < 0)
continue;
version = drmGetVersion(fd);
if (!version) {
close(fd);
fd = -1;
continue;
}
undesired_found = false;
for (uint32_t i = 0; i < ARRAY_SIZE(undesired); i++) {
if (undesired[i] && !strcmp(version->name, undesired[i]))
undesired_found = true;
}
drmFreeVersion(version);
if (undesired_found) {
close(fd);
fd = -1;
continue;
}
break;
}
out:
closedir(dir);
return fd;
}
static const struct planar_layout *layout_from_format(uint32_t format)
{
switch (format) {
case GBM_FORMAT_R8:
return &packed_1bpp_layout;
case GBM_FORMAT_YVU420:
return &triplanar_yuv_420_layout;
case GBM_FORMAT_NV12:
return &biplanar_yuv_420_layout;
case GBM_FORMAT_RGB565:
return &packed_2bpp_layout;
case GBM_FORMAT_ARGB8888:
case GBM_FORMAT_XRGB8888:
case GBM_FORMAT_ABGR8888:
case GBM_FORMAT_XBGR8888:
case GBM_FORMAT_ABGR2101010:
return &packed_4bpp_layout;
case GBM_FORMAT_ABGR16161616F:
return &packed_8bpp_layout;
default:
return NULL;
}
}
#ifdef ENABLE_MINIGBM_ALLOCATION
static void virgl_gbm_transfer_internal(uint32_t planar_bytes_per_pixel,
uint32_t subsampled_width,
uint32_t subsampled_height,
uint32_t guest_plane_stride,
uint32_t guest_resource_offset,
uint32_t host_plane_stride, uint8_t *host_address,
const struct iovec *iovecs, uint32_t num_iovecs,
uint32_t direction)
{
bool next_iovec, next_line;
uint32_t current_height, current_iovec, iovec_start_offset;
current_height = current_iovec = iovec_start_offset = 0;
while (current_height < subsampled_height && current_iovec < num_iovecs) {
uint32_t iovec_size = iovecs[current_iovec].iov_len;
uint32_t iovec_end_offset = iovec_start_offset + iovec_size;
uint32_t box_start_offset = guest_resource_offset + current_height * guest_plane_stride;
uint32_t box_end_offset = box_start_offset + subsampled_width * planar_bytes_per_pixel;
uint32_t max_start = MAX2(iovec_start_offset, box_start_offset);
uint32_t min_end = MIN2(iovec_end_offset, box_end_offset);
if (max_start < min_end) {
uint32_t offset_in_iovec = (max_start > iovec_start_offset) ?
(max_start - iovec_start_offset) : 0;
uint32_t copy_iovec_size = min_end - max_start;
if (min_end >= iovec_end_offset) {
next_iovec = true;
next_line = false;
} else {
next_iovec = false;
next_line = true;
}
uint8_t *guest_start = (uint8_t*)iovecs[current_iovec].iov_base + offset_in_iovec;
uint8_t *host_start = host_address + (current_height * host_plane_stride) +
(max_start - box_start_offset);
if (direction == VIRGL_TRANSFER_TO_HOST)
memcpy(host_start, guest_start, copy_iovec_size);
else
memcpy(guest_start, host_start, copy_iovec_size);
} else {
if (box_start_offset >= iovec_start_offset) {
next_iovec = true;
next_line = false;
} else {
next_iovec = false;
next_line = true;
}
}
if (next_iovec) {
iovec_start_offset += iovec_size;
current_iovec++;
}
if (next_line)
current_height++;
}
}
#endif /* ENABLE_MINIGBM_ALLOCATION */
struct virgl_gbm *virgl_gbm_init(int fd)
{
struct virgl_gbm *gbm = calloc(1, sizeof(struct virgl_gbm));
if (!gbm)
return NULL;
gbm->fd = -1;
if (fd < 0) {
#ifdef ENABLE_MINIGBM_ALLOCATION
gbm->fd = gbm_get_default_device_fd();
if (gbm->fd < 0)
#endif
gbm->fd = rendernode_open();
if (gbm->fd < 0)
goto out_error;
gbm->device = gbm_create_device(gbm->fd);
if (!gbm->device) {
close(gbm->fd);
goto out_error;
}
} else {
gbm->device = gbm_create_device(fd);
if (!gbm->device)
goto out_error;
gbm->fd = fd;
}
return gbm;
out_error:
free(gbm);
return NULL;
}
void virgl_gbm_fini(struct virgl_gbm *gbm)
{
gbm_device_destroy(gbm->device);
if (gbm->fd >= 0)
close(gbm->fd);
free(gbm);
}
int virgl_gbm_convert_format(uint32_t *virgl_format, uint32_t *gbm_format)
{
if (!virgl_format || !gbm_format)
return -1;
if (*virgl_format != 0 && *gbm_format != 0)
return -1;
for (uint32_t i = 0; i < ARRAY_SIZE(conversions); i++) {
if (conversions[i].gbm_format == *gbm_format ||
conversions[i].virgl_format == *virgl_format) {
*gbm_format = conversions[i].gbm_format;
*virgl_format = conversions[i].virgl_format;
return 0;
}
}
return -1;
}
#ifdef ENABLE_MINIGBM_ALLOCATION
int virgl_gbm_transfer(struct gbm_bo *bo, uint32_t direction, const struct iovec *iovecs,
uint32_t num_iovecs, const struct vrend_transfer_info *info)
{
void *map_data;
uint32_t guest_plane_offset, guest_stride0, host_map_stride0;
uint32_t width = gbm_bo_get_width(bo);
uint32_t height = gbm_bo_get_height(bo);
uint32_t format = gbm_bo_get_format(bo);
int plane_count = gbm_bo_get_plane_count(bo);
const struct planar_layout *layout = layout_from_format(format);
if (!layout)
return -1;
host_map_stride0 = 0;
uint32_t map_flags = (direction == VIRGL_TRANSFER_TO_HOST) ? GBM_BO_TRANSFER_WRITE :
GBM_BO_TRANSFER_READ;
/* XXX remove this and map just the region when single plane and GBM honors the region */
if (direction == VIRGL_TRANSFER_TO_HOST &&
!(info->box->x == 0 && info->box->y == 0 &&
info->box->width == (int)width && info->box->height == (int)height))
map_flags |= GBM_BO_TRANSFER_READ;
void *addr = gbm_bo_map(bo, 0, 0, width, height, map_flags, &host_map_stride0, &map_data);
if (!addr)
return -1;
guest_plane_offset = info->offset;
guest_stride0 = 0;
/*
* Unfortunately, the kernel doesn't actually pass the guest layer_stride and
* guest stride to the host (compare virtio_gpu.h and virtgpu_drm.h). We can use
* the level (always zero for 2D images) to work around this.
*/
if (info->stride || info->level) {
guest_stride0 = info->stride ? info->stride : info->level;
if (guest_stride0 < (uint32_t)info->box->width * layout->bytes_per_pixel[0])
return -1;
} else {
guest_stride0 = width * layout->bytes_per_pixel[0];
}
if (guest_stride0 > host_map_stride0)
return -1;
for (int plane = 0; plane < plane_count; plane++) {
uint32_t host_plane_offset = gbm_bo_get_offset(bo, plane);
uint32_t subsampled_x = info->box->x / layout->horizontal_subsampling[plane];
uint32_t subsampled_y = info->box->y / layout->vertical_subsampling[plane];
uint32_t subsampled_width = info->box->width / layout->horizontal_subsampling[plane];
uint32_t subsampled_height = info->box->height / layout->vertical_subsampling[plane];
uint32_t plane_height = height / layout->vertical_subsampling[plane];
uint32_t plane_byte_ratio = layout->bytes_per_pixel[plane] / layout->bytes_per_pixel[0];
uint32_t guest_plane_stride = (guest_stride0 * plane_byte_ratio)
/ layout->horizontal_subsampling[plane];
uint32_t host_plane_stride = plane == 0
? host_map_stride0 : gbm_bo_get_stride_for_plane(bo, plane);
uint32_t guest_resource_offset = guest_plane_offset;
uint32_t host_resource_offset = host_plane_offset + (subsampled_y * host_plane_stride)
+ subsampled_x * layout->bytes_per_pixel[plane];
uint8_t *host_address = (uint8_t*)addr + host_resource_offset;
/*
* Here we apply another hack. info->offset does not account for
* info->box for planar resources and we need to make adjustments.
*/
if (plane_count > 1) {
guest_resource_offset += (subsampled_y * guest_plane_stride)
+ subsampled_x * layout->bytes_per_pixel[plane];
}
virgl_gbm_transfer_internal(layout->bytes_per_pixel[plane], subsampled_width,
subsampled_height, guest_plane_stride, guest_resource_offset,
host_plane_stride, host_address, iovecs, num_iovecs, direction);
if (info->layer_stride) {
guest_plane_offset += (info->layer_stride * plane_byte_ratio)
/ (layout->horizontal_subsampling[plane] * layout->vertical_subsampling[plane]);
} else {
guest_plane_offset += plane_height * guest_plane_stride;
}
}
gbm_bo_unmap(bo, map_data);
return 0;
}
uint32_t virgl_gbm_convert_flags(uint32_t virgl_bind_flags)
{
uint32_t flags = 0;
if (virgl_bind_flags & VIRGL_BIND_SAMPLER_VIEW)
flags |= GBM_BO_USE_TEXTURING;
if (virgl_bind_flags & VIRGL_BIND_RENDER_TARGET)
flags |= GBM_BO_USE_RENDERING;
if (virgl_bind_flags & VIRGL_BIND_SCANOUT)
flags |= GBM_BO_USE_SCANOUT;
if (virgl_bind_flags & VIRGL_BIND_CURSOR)
flags |= GBM_BO_USE_CURSOR;
if (virgl_bind_flags & VIRGL_BIND_LINEAR)
flags |= GBM_BO_USE_LINEAR;
if (virgl_bind_flags & VIRGL_BIND_MINIGBM_CAMERA_WRITE)
flags |= GBM_BO_USE_CAMERA_WRITE;
if (virgl_bind_flags & VIRGL_BIND_MINIGBM_CAMERA_READ)
flags |= GBM_BO_USE_CAMERA_READ;
if (virgl_bind_flags & VIRGL_BIND_MINIGBM_HW_VIDEO_DECODER)
flags |= GBM_BO_USE_HW_VIDEO_DECODER;
if (virgl_bind_flags & VIRGL_BIND_MINIGBM_HW_VIDEO_ENCODER)
flags |= GBM_BO_USE_HW_VIDEO_ENCODER;
if ((virgl_bind_flags & VIRGL_BIND_MINIGBM_PROTECTED) ==
(uint32_t)VIRGL_BIND_MINIGBM_PROTECTED) {
flags |= GBM_BO_USE_PROTECTED;
} else {
if (virgl_bind_flags & VIRGL_BIND_MINIGBM_SW_READ_OFTEN)
flags |= GBM_BO_USE_SW_READ_OFTEN;
if (virgl_bind_flags & VIRGL_BIND_MINIGBM_SW_READ_RARELY)
flags |= GBM_BO_USE_SW_READ_RARELY;
if (virgl_bind_flags & VIRGL_BIND_MINIGBM_SW_WRITE_OFTEN)
flags |= GBM_BO_USE_SW_WRITE_OFTEN;
if (virgl_bind_flags & VIRGL_BIND_MINIGBM_SW_WRITE_RARELY)
flags |= GBM_BO_USE_SW_WRITE_RARELY;
}
return flags;
}
int virgl_gbm_export_query(struct gbm_bo *bo, struct virgl_renderer_export_query *query)
{
int ret = -1;
uint32_t handles[VIRGL_GBM_MAX_PLANES] = { 0 };
struct gbm_device *gbm = gbm_bo_get_device(bo);
int num_planes = gbm_bo_get_plane_count(bo);
if (num_planes < 0 || num_planes > VIRGL_GBM_MAX_PLANES)
return ret;
query->out_num_fds = 0;
query->out_fourcc = 0;
query->out_modifier = DRM_FORMAT_MOD_INVALID;
for (int plane = 0; plane < VIRGL_GBM_MAX_PLANES; plane++) {
query->out_fds[plane] = -1;
query->out_strides[plane] = 0;
query->out_offsets[plane] = 0;
}
for (int plane = 0; plane < num_planes; plane++) {
uint32_t i, handle;
query->out_strides[plane] = gbm_bo_get_stride_for_plane(bo, plane);
query->out_offsets[plane] = gbm_bo_get_offset(bo, plane);
handle = gbm_bo_get_handle_for_plane(bo, plane).u32;
for (i = 0; i < query->out_num_fds; i++) {
if (handles[i] == handle)
break;
}
if (i == query->out_num_fds) {
if (query->in_export_fds) {
ret = virgl_gbm_export_fd(gbm, handle, &query->out_fds[query->out_num_fds]);
if (ret)
goto err_close;
}
handles[query->out_num_fds] = handle;
query->out_num_fds++;
}
}
query->out_modifier = gbm_bo_get_modifier(bo);
query->out_fourcc = gbm_bo_get_format(bo);
return 0;
err_close:
for (int plane = 0; plane < VIRGL_GBM_MAX_PLANES; plane++) {
if (query->out_fds[plane] >= 0) {
close(query->out_fds[plane]);
query->out_fds[plane] = -1;
}
query->out_strides[plane] = 0;
query->out_offsets[plane] = 0;
}
query->out_num_fds = 0;
return ret;
}
#endif
int virgl_gbm_export_fd(struct gbm_device *gbm, uint32_t handle, int32_t *out_fd)
{
int ret;
ret = drmPrimeHandleToFD(gbm_device_get_fd(gbm), handle, DRM_CLOEXEC | DRM_RDWR, out_fd);
// Kernels with older DRM core versions block DRM_RDWR but give a
// read/write mapping anyway.
if (ret)
ret = drmPrimeHandleToFD(gbm_device_get_fd(gbm), handle, DRM_CLOEXEC, out_fd);
return ret;
}
int virgl_gbm_get_plane_width(struct gbm_bo *bo, int plane) {
uint32_t format = gbm_bo_get_format(bo);
const struct planar_layout *layout = layout_from_format(format);
if (!layout)
return -1;
return gbm_bo_get_width(bo) / layout->horizontal_subsampling[plane];
}
int virgl_gbm_get_plane_height(struct gbm_bo *bo, int plane) {
uint32_t format = gbm_bo_get_format(bo);
const struct planar_layout *layout = layout_from_format(format);
if (!layout)
return -1;
return gbm_bo_get_height(bo) / layout->vertical_subsampling[plane];
}
int virgl_gbm_get_plane_bytes_per_pixel(struct gbm_bo *bo, int plane) {
uint32_t format = gbm_bo_get_format(bo);
const struct planar_layout *layout = layout_from_format(format);
if (!layout)
return -1;
return layout->bytes_per_pixel[plane];
}
bool virgl_gbm_external_allocation_preferred(uint32_t flags) {
return (flags & (VIRGL_RES_BIND_SCANOUT | VIRGL_RES_BIND_SHARED)) != 0;
}
bool virgl_gbm_gpu_import_required(uint32_t flags) {
return !virgl_gbm_external_allocation_preferred(flags) ||
(flags & (VIRGL_BIND_RENDER_TARGET | VIRGL_BIND_SAMPLER_VIEW)) != 0;
}