/**
* Request a transfer map to the texture resource
*/
static void *
svga_texture_transfer_map(struct pipe_context *pipe,
struct pipe_resource *texture,
unsigned level,
unsigned usage,
const struct pipe_box *box,
struct pipe_transfer **ptransfer)
{
struct svga_context *svga = svga_context(pipe);
struct svga_winsys_screen *sws = svga_screen(pipe->screen)->sws;
struct svga_texture *tex = svga_texture(texture);
struct svga_transfer *st;
struct svga_winsys_surface *surf = tex->handle;
boolean use_direct_map = svga_have_gb_objects(svga) &&
!svga_have_gb_dma(svga);
void *map = NULL;
int64_t begin = svga_get_time(svga);
SVGA_STATS_TIME_PUSH(sws, SVGA_STATS_TIME_TEXTRANSFERMAP);
if (!surf)
goto done;
/* We can't map texture storage directly unless we have GB objects */
if (usage & PIPE_TRANSFER_MAP_DIRECTLY) {
if (svga_have_gb_objects(svga))
use_direct_map = TRUE;
else
goto done;
}
st = CALLOC_STRUCT(svga_transfer);
if (!st)
goto done;
st->base.level = level;
st->base.usage = usage;
st->base.box = *box;
/* The modified transfer map box with the array index removed from z.
* The array index is specified in slice.
*/
st->box.x = box->x;
st->box.y = box->y;
st->box.z = box->z;
st->box.w = box->width;
st->box.h = box->height;
st->box.d = box->depth;
switch (tex->b.b.target) {
case PIPE_TEXTURE_CUBE:
st->slice = st->base.box.z;
st->box.z = 0; /* so we don't apply double offsets below */
break;
case PIPE_TEXTURE_1D_ARRAY:
case PIPE_TEXTURE_2D_ARRAY:
case PIPE_TEXTURE_CUBE_ARRAY:
st->slice = st->base.box.z;
st->box.z = 0; /* so we don't apply double offsets below */
/* Force direct map for transfering multiple slices */
if (st->base.box.depth > 1)
use_direct_map = svga_have_gb_objects(svga);
break;
default:
st->slice = 0;
break;
}
/* Force direct map for multisample surface */
if (texture->nr_samples > 1) {
assert(svga_have_gb_objects(svga));
assert(sws->have_sm4_1);
use_direct_map = TRUE;
}
st->use_direct_map = use_direct_map;
pipe_resource_reference(&st->base.resource, texture);
/* If this is the first time mapping to the surface in this
* command buffer, clear the dirty masks of this surface.
*/
if (sws->surface_is_flushed(sws, surf)) {
svga_clear_texture_dirty(tex);
}
if (!use_direct_map) {
/* upload to the DMA buffer */
map = svga_texture_transfer_map_dma(svga, st);
}
else {
boolean can_use_upload = tex->can_use_upload &&
!(st->base.usage & PIPE_TRANSFER_READ);
boolean was_rendered_to =
svga_was_texture_rendered_to(svga_texture(texture),
st->slice, st->base.level);
/* If the texture was already rendered to and upload buffer
* is supported, then we will use upload buffer to
* avoid the need to read back the texture content; otherwise,
* we'll first try to map directly to the GB surface, if it is blocked,
* then we'll try the upload buffer.
*/
if (was_rendered_to && can_use_upload) {
map = svga_texture_transfer_map_upload(svga, st);
}
else {
unsigned orig_usage = st->base.usage;
/* First try directly map to the GB surface */
if (can_use_upload)
st->base.usage |= PIPE_TRANSFER_DONTBLOCK;
map = svga_texture_transfer_map_direct(svga, st);
st->base.usage = orig_usage;
if (!map && can_use_upload) {
/* if direct map with DONTBLOCK fails, then try upload to the
* texture upload buffer.
*/
map = svga_texture_transfer_map_upload(svga, st);
}
}
/* If upload fails, then try direct map again without forcing it
* to DONTBLOCK.
*/
if (!map) {
map = svga_texture_transfer_map_direct(svga, st);
}
}
if (!map) {
FREE(st);
}
else {
*ptransfer = &st->base;
svga->hud.num_textures_mapped++;
if (usage & PIPE_TRANSFER_WRITE) {
/* record texture upload for HUD */
svga->hud.num_bytes_uploaded +=
st->base.layer_stride * st->box.d;
/* mark this texture level as dirty */
svga_set_texture_dirty(tex, st->slice, level);
}
}
done:
svga->hud.map_buffer_time += (svga_get_time(svga) - begin);
SVGA_STATS_TIME_POP(sws);
(void) sws;
return map;
}
static void *
svga_texture_transfer_map(struct pipe_context *pipe,
struct pipe_resource *texture,
unsigned level,
unsigned usage,
const struct pipe_box *box,
struct pipe_transfer **ptransfer)
{
struct svga_context *svga = svga_context(pipe);
struct svga_screen *ss = svga_screen(pipe->screen);
struct svga_winsys_screen *sws = ss->sws;
struct svga_texture *tex = svga_texture(texture);
struct svga_transfer *st;
unsigned nblocksx, nblocksy;
boolean use_direct_map = svga_have_gb_objects(svga) &&
!svga_have_gb_dma(svga);
unsigned d;
void *returnVal;
int64_t begin = os_time_get();
/* We can't map texture storage directly unless we have GB objects */
if (usage & PIPE_TRANSFER_MAP_DIRECTLY) {
if (svga_have_gb_objects(svga))
use_direct_map = TRUE;
else
return NULL;
}
st = CALLOC_STRUCT(svga_transfer);
if (!st)
return NULL;
st->base.level = level;
st->base.usage = usage;
st->base.box = *box;
switch (tex->b.b.target) {
case PIPE_TEXTURE_CUBE:
st->slice = st->base.box.z;
st->base.box.z = 0; /* so we don't apply double offsets below */
break;
case PIPE_TEXTURE_2D_ARRAY:
case PIPE_TEXTURE_1D_ARRAY:
st->slice = st->base.box.z;
st->base.box.z = 0; /* so we don't apply double offsets below */
/* Force direct map for transfering multiple slices */
if (st->base.box.depth > 1)
use_direct_map = svga_have_gb_objects(svga);
break;
default:
st->slice = 0;
break;
}
{
unsigned w, h;
if (use_direct_map) {
/* we'll directly access the guest-backed surface */
w = u_minify(texture->width0, level);
h = u_minify(texture->height0, level);
d = u_minify(texture->depth0, level);
}
else {
/* we'll put the data into a tightly packed buffer */
w = box->width;
h = box->height;
d = box->depth;
}
nblocksx = util_format_get_nblocksx(texture->format, w);
nblocksy = util_format_get_nblocksy(texture->format, h);
}
pipe_resource_reference(&st->base.resource, texture);
st->base.stride = nblocksx*util_format_get_blocksize(texture->format);
st->base.layer_stride = st->base.stride * nblocksy;
if (usage & PIPE_TRANSFER_WRITE) {
/* record texture upload for HUD */
svga->hud.num_bytes_uploaded +=
nblocksx * nblocksy * d * util_format_get_blocksize(texture->format);
}
if (!use_direct_map) {
/* Use a DMA buffer */
st->hw_nblocksy = nblocksy;
st->hwbuf = svga_winsys_buffer_create(svga, 1, 0,
st->hw_nblocksy * st->base.stride * d);
while(!st->hwbuf && (st->hw_nblocksy /= 2)) {
st->hwbuf = svga_winsys_buffer_create(svga, 1, 0,
st->hw_nblocksy * st->base.stride * d);
}
if (!st->hwbuf) {
FREE(st);
return NULL;
}
if (st->hw_nblocksy < nblocksy) {
/* We couldn't allocate a hardware buffer big enough for the transfer,
* so allocate regular malloc memory instead */
if (0) {
debug_printf("%s: failed to allocate %u KB of DMA, "
"splitting into %u x %u KB DMA transfers\n",
__FUNCTION__,
(nblocksy*st->base.stride + 1023)/1024,
(nblocksy + st->hw_nblocksy - 1)/st->hw_nblocksy,
(st->hw_nblocksy*st->base.stride + 1023)/1024);
}
st->swbuf = MALLOC(nblocksy * st->base.stride * d);
if (!st->swbuf) {
sws->buffer_destroy(sws, st->hwbuf);
FREE(st);
return NULL;
}
}
if (usage & PIPE_TRANSFER_READ) {
SVGA3dSurfaceDMAFlags flags;
memset(&flags, 0, sizeof flags);
svga_transfer_dma(svga, st, SVGA3D_READ_HOST_VRAM, flags);
}
} else {
struct pipe_transfer *transfer = &st->base;
struct svga_winsys_surface *surf = tex->handle;
if (!surf) {
FREE(st);
return NULL;
}
/* If this is the first time mapping to the surface in this
* command buffer, clear the dirty masks of this surface.
*/
if (sws->surface_is_flushed(sws, surf)) {
svga_clear_texture_dirty(tex);
}
if (need_tex_readback(transfer)) {
enum pipe_error ret;
svga_surfaces_flush(svga);
if (svga_have_vgpu10(svga)) {
ret = readback_image_vgpu10(svga, surf, st->slice, transfer->level,
tex->b.b.last_level + 1);
} else {
ret = readback_image_vgpu9(svga, surf, st->slice, transfer->level);
}
svga->hud.num_readbacks++;
assert(ret == PIPE_OK);
(void) ret;
svga_context_flush(svga, NULL);
/*
* Note: if PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE were specified
* we could potentially clear the flag for all faces/layers/mips.
*/
svga_clear_texture_rendered_to(tex, st->slice, transfer->level);
}
else {
assert(transfer->usage & PIPE_TRANSFER_WRITE);
if ((transfer->usage & PIPE_TRANSFER_UNSYNCHRONIZED) == 0) {
if (svga_is_texture_dirty(tex, st->slice, transfer->level)) {
/*
* do a surface flush if the subresource has been modified
* in this command buffer.
*/
svga_surfaces_flush(svga);
if (!sws->surface_is_flushed(sws, surf)) {
svga->hud.surface_write_flushes++;
svga_context_flush(svga, NULL);
}
}
}
}
if (transfer->usage & PIPE_TRANSFER_WRITE) {
/* mark this texture level as dirty */
svga_set_texture_dirty(tex, st->slice, transfer->level);
}
}
st->use_direct_map = use_direct_map;
*ptransfer = &st->base;
/*
* Begin mapping code
*/
if (st->swbuf) {
returnVal = st->swbuf;
}
else if (!st->use_direct_map) {
returnVal = sws->buffer_map(sws, st->hwbuf, usage);
}
else {
SVGA3dSize baseLevelSize;
struct svga_texture *tex = svga_texture(texture);
struct svga_winsys_surface *surf = tex->handle;
uint8_t *map;
boolean retry;
unsigned offset, mip_width, mip_height;
unsigned xoffset = st->base.box.x;
unsigned yoffset = st->base.box.y;
unsigned zoffset = st->base.box.z;
map = svga->swc->surface_map(svga->swc, surf, usage, &retry);
if (map == NULL && retry) {
/*
* At this point, the svga_surfaces_flush() should already have
* called in svga_texture_get_transfer().
*/
svga_context_flush(svga, NULL);
map = svga->swc->surface_map(svga->swc, surf, usage, &retry);
}
/*
* Make sure we return NULL if the map fails
*/
if (!map) {
FREE(st);
return map;
}
/**
* Compute the offset to the specific texture slice in the buffer.
*/
baseLevelSize.width = tex->b.b.width0;
baseLevelSize.height = tex->b.b.height0;
baseLevelSize.depth = tex->b.b.depth0;
if ((tex->b.b.target == PIPE_TEXTURE_1D_ARRAY) ||
(tex->b.b.target == PIPE_TEXTURE_2D_ARRAY)) {
st->base.layer_stride =
svga3dsurface_get_image_offset(tex->key.format, baseLevelSize,
tex->b.b.last_level + 1, 1, 0);
}
offset = svga3dsurface_get_image_offset(tex->key.format, baseLevelSize,
tex->b.b.last_level + 1, /* numMips */
st->slice, level);
if (level > 0) {
assert(offset > 0);
}
mip_width = u_minify(tex->b.b.width0, level);
mip_height = u_minify(tex->b.b.height0, level);
offset += svga3dsurface_get_pixel_offset(tex->key.format,
mip_width, mip_height,
xoffset, yoffset, zoffset);
returnVal = (void *) (map + offset);
}
svga->hud.map_buffer_time += (os_time_get() - begin);
svga->hud.num_resources_mapped++;
return returnVal;
}
