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/*
* Copyright 2014, 2015 Red Hat.
*
* 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
* on the rights to use, copy, modify, merge, publish, distribute, sub
* license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
* THE AUTHOR(S) AND/OR THEIR SUPPLIERS 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.
*/
#include "util/u_format.h"
#include "util/u_inlines.h"
#include "util/u_memory.h"
#include "virgl_context.h"
#include "virgl_resource.h"
#include "virgl_screen.h"
/* We need to flush to properly sync the transfer with the current cmdbuf.
* But there are cases where the flushing can be skipped:
*
* - synchronization is disabled
* - the resource is not referenced by the current cmdbuf
* - the current cmdbuf has no draw/compute command that accesses the
* resource (XXX there are also clear or blit commands)
* - the transfer is to an undefined region and we can assume the current
* cmdbuf has no command that accesses the region (XXX we cannot just check
* for overlapping transfers)
*/
static bool virgl_res_needs_flush(struct virgl_context *vctx,
struct virgl_transfer *trans)
{
struct virgl_winsys *vws = virgl_screen(vctx->base.screen)->vws;
struct virgl_resource *res = virgl_resource(trans->base.resource);
if (trans->base.usage & PIPE_TRANSFER_UNSYNCHRONIZED)
return false;
if (!vws->res_is_referenced(vws, vctx->cbuf, res->hw_res))
return false;
if (res->clean_mask & (1 << trans->base.level)) {
/* XXX Consider
*
* glCopyBufferSubData(src, dst, ...);
* glBufferSubData(src, ...);
*
* at the beginning of a cmdbuf. glBufferSubData will be incorrectly
* reordered before glCopyBufferSubData.
*/
if (vctx->num_draws == 0 && vctx->num_compute == 0)
return false;
/* XXX Consider
*
* glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(float) * 3, data1);
* glFlush();
* glDrawArrays(GL_TRIANGLES, 0, 3);
* glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(float) * 3, data2);
* glDrawArrays(GL_TRIANGLES, 0, 3);
*
* Both draws will see data2.
*/
if (!virgl_transfer_queue_is_queued(&vctx->queue, trans))
return false;
}
return true;
}
/* We need to read back from the host storage to make sure the guest storage
* is up-to-date. But there are cases where the readback can be skipped:
*
* - the content can be discarded
* - the host storage is read-only
*
* Note that PIPE_TRANSFER_WRITE without discard bits requires readback.
* PIPE_TRANSFER_READ becomes irrelevant. PIPE_TRANSFER_UNSYNCHRONIZED and
* PIPE_TRANSFER_FLUSH_EXPLICIT are also irrelevant.
*/
static bool virgl_res_needs_readback(struct virgl_context *vctx,
struct virgl_resource *res,
unsigned usage, unsigned level)
{
if (usage & (PIPE_TRANSFER_DISCARD_RANGE |
PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE))
return false;
if (res->clean_mask & (1 << level))
return false;
return true;
}
void
virgl_resource_transfer_prepare(struct virgl_context *vctx,
struct virgl_transfer *xfer)
{
struct virgl_winsys *vws = virgl_screen(vctx->base.screen)->vws;
struct virgl_resource *res = virgl_resource(xfer->base.resource);
bool flush;
bool readback;
bool wait;
flush = virgl_res_needs_flush(vctx, xfer);
readback = virgl_res_needs_readback(vctx, res, xfer->base.usage,
xfer->base.level);
/* XXX This is incorrect. Consider
*
* glTexImage2D(..., data1);
* glDrawArrays();
* glFlush();
* glTexImage2D(..., data2);
*
* readback and flush are both false in the second glTexImage2D call. The
* draw call might end up seeing data2. Same applies to buffers with
* glBufferSubData.
*/
wait = flush || readback;
if (flush)
vctx->base.flush(&vctx->base, NULL, 0);
if (readback) {
vws->transfer_get(vws, res->hw_res, &xfer->base.box, xfer->base.stride,
xfer->l_stride, xfer->offset, xfer->base.level);
}
if (wait)
vws->resource_wait(vws, res->hw_res);
}
static struct pipe_resource *virgl_resource_create(struct pipe_screen *screen,
const struct pipe_resource *templ)
{
unsigned vbind;
struct virgl_screen *vs = virgl_screen(screen);
struct virgl_resource *res = CALLOC_STRUCT(virgl_resource);
res->u.b = *templ;
res->u.b.screen = &vs->base;
pipe_reference_init(&res->u.b.reference, 1);
vbind = pipe_to_virgl_bind(vs, templ->bind);
virgl_resource_layout(&res->u.b, &res->metadata);
res->hw_res = vs->vws->resource_create(vs->vws, templ->target,
templ->format, vbind,
templ->width0,
templ->height0,
templ->depth0,
templ->array_size,
templ->last_level,
templ->nr_samples,
res->metadata.total_size);
if (!res->hw_res) {
FREE(res);
return NULL;
}
res->clean_mask = (1 << VR_MAX_TEXTURE_2D_LEVELS) - 1;
if (templ->target == PIPE_BUFFER)
virgl_buffer_init(res);
else
virgl_texture_init(res);
return &res->u.b;
}
static struct pipe_resource *virgl_resource_from_handle(struct pipe_screen *screen,
const struct pipe_resource *templ,
struct winsys_handle *whandle,
unsigned usage)
{
struct virgl_screen *vs = virgl_screen(screen);
if (templ->target == PIPE_BUFFER)
return NULL;
struct virgl_resource *res = CALLOC_STRUCT(virgl_resource);
res->u.b = *templ;
res->u.b.screen = &vs->base;
pipe_reference_init(&res->u.b.reference, 1);
res->hw_res = vs->vws->resource_create_from_handle(vs->vws, whandle);
if (!res->hw_res) {
FREE(res);
return NULL;
}
virgl_texture_init(res);
return &res->u.b;
}
void virgl_init_screen_resource_functions(struct pipe_screen *screen)
{
screen->resource_create = virgl_resource_create;
screen->resource_from_handle = virgl_resource_from_handle;
screen->resource_get_handle = u_resource_get_handle_vtbl;
screen->resource_destroy = u_resource_destroy_vtbl;
}
static bool virgl_buffer_transfer_extend(struct pipe_context *ctx,
struct pipe_resource *resource,
unsigned usage,
const struct pipe_box *box,
const void *data)
{
struct virgl_context *vctx = virgl_context(ctx);
struct virgl_resource *vbuf = virgl_resource(resource);
struct virgl_transfer dummy_trans = { 0 };
bool flush;
struct virgl_transfer *queued;
/*
* Attempts to short circuit the entire process of mapping and unmapping
* a resource if there is an existing transfer that can be extended.
* Pessimestically falls back if a flush is required.
*/
dummy_trans.base.resource = resource;
dummy_trans.base.usage = usage;
dummy_trans.base.box = *box;
dummy_trans.base.stride = vbuf->metadata.stride[0];
dummy_trans.base.layer_stride = vbuf->metadata.layer_stride[0];
dummy_trans.offset = box->x;
flush = virgl_res_needs_flush(vctx, &dummy_trans);
if (flush)
return false;
queued = virgl_transfer_queue_extend(&vctx->queue, &dummy_trans);
if (!queued || !queued->hw_res_map)
return false;
memcpy(queued->hw_res_map + dummy_trans.offset, data, box->width);
return true;
}
static void virgl_buffer_subdata(struct pipe_context *pipe,
struct pipe_resource *resource,
unsigned usage, unsigned offset,
unsigned size, const void *data)
{
struct pipe_transfer *transfer;
uint8_t *map;
struct pipe_box box;
assert(!(usage & PIPE_TRANSFER_READ));
/* the write flag is implicit by the nature of buffer_subdata */
usage |= PIPE_TRANSFER_WRITE;
if (offset == 0 && size == resource->width0)
usage |= PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE;
else
usage |= PIPE_TRANSFER_DISCARD_RANGE;
u_box_1d(offset, size, &box);
if (usage & PIPE_TRANSFER_DISCARD_RANGE &&
virgl_buffer_transfer_extend(pipe, resource, usage, &box, data))
return;
map = pipe->transfer_map(pipe, resource, 0, usage, &box, &transfer);
if (map) {
memcpy(map, data, size);
pipe_transfer_unmap(pipe, transfer);
}
}
void virgl_init_context_resource_functions(struct pipe_context *ctx)
{
ctx->transfer_map = u_transfer_map_vtbl;
ctx->transfer_flush_region = u_transfer_flush_region_vtbl;
ctx->transfer_unmap = u_transfer_unmap_vtbl;
ctx->buffer_subdata = virgl_buffer_subdata;
ctx->texture_subdata = u_default_texture_subdata;
}
void virgl_resource_layout(struct pipe_resource *pt,
struct virgl_resource_metadata *metadata)
{
unsigned level, nblocksy;
unsigned width = pt->width0;
unsigned height = pt->height0;
unsigned depth = pt->depth0;
unsigned buffer_size = 0;
for (level = 0; level <= pt->last_level; level++) {
unsigned slices;
if (pt->target == PIPE_TEXTURE_CUBE)
slices = 6;
else if (pt->target == PIPE_TEXTURE_3D)
slices = depth;
else
slices = pt->array_size;
nblocksy = util_format_get_nblocksy(pt->format, height);
metadata->stride[level] = util_format_get_stride(pt->format, width);
metadata->layer_stride[level] = nblocksy * metadata->stride[level];
metadata->level_offset[level] = buffer_size;
buffer_size += slices * metadata->layer_stride[level];
width = u_minify(width, 1);
height = u_minify(height, 1);
depth = u_minify(depth, 1);
}
if (pt->nr_samples <= 1)
metadata->total_size = buffer_size;
else /* don't create guest backing store for MSAA */
metadata->total_size = 0;
}
struct virgl_transfer *
virgl_resource_create_transfer(struct slab_child_pool *pool,
struct pipe_resource *pres,
const struct virgl_resource_metadata *metadata,
unsigned level, unsigned usage,
const struct pipe_box *box)
{
struct virgl_transfer *trans;
enum pipe_format format = pres->format;
const unsigned blocksy = box->y / util_format_get_blockheight(format);
const unsigned blocksx = box->x / util_format_get_blockwidth(format);
unsigned offset = metadata->level_offset[level];
if (pres->target == PIPE_TEXTURE_CUBE ||
pres->target == PIPE_TEXTURE_CUBE_ARRAY ||
pres->target == PIPE_TEXTURE_3D ||
pres->target == PIPE_TEXTURE_2D_ARRAY) {
offset += box->z * metadata->layer_stride[level];
}
else if (pres->target == PIPE_TEXTURE_1D_ARRAY) {
offset += box->z * metadata->stride[level];
assert(box->y == 0);
} else if (pres->target == PIPE_BUFFER) {
assert(box->y == 0 && box->z == 0);
} else {
assert(box->z == 0);
}
offset += blocksy * metadata->stride[level];
offset += blocksx * util_format_get_blocksize(format);
trans = slab_alloc(pool);
if (!trans)
return NULL;
trans->base.resource = pres;
trans->base.level = level;
trans->base.usage = usage;
trans->base.box = *box;
trans->base.stride = metadata->stride[level];
trans->base.layer_stride = metadata->layer_stride[level];
trans->offset = offset;
util_range_init(&trans->range);
if (trans->base.resource->target != PIPE_TEXTURE_3D &&
trans->base.resource->target != PIPE_TEXTURE_CUBE &&
trans->base.resource->target != PIPE_TEXTURE_1D_ARRAY &&
trans->base.resource->target != PIPE_TEXTURE_2D_ARRAY &&
trans->base.resource->target != PIPE_TEXTURE_CUBE_ARRAY)
trans->l_stride = 0;
else
trans->l_stride = trans->base.layer_stride;
return trans;
}
void virgl_resource_destroy_transfer(struct slab_child_pool *pool,
struct virgl_transfer *trans)
{
util_range_destroy(&trans->range);
slab_free(pool, trans);
}
void virgl_resource_destroy(struct pipe_screen *screen,
struct pipe_resource *resource)
{
struct virgl_screen *vs = virgl_screen(screen);
struct virgl_resource *res = virgl_resource(resource);
vs->vws->resource_unref(vs->vws, res->hw_res);
FREE(res);
}
boolean virgl_resource_get_handle(struct pipe_screen *screen,
struct pipe_resource *resource,
struct winsys_handle *whandle)
{
struct virgl_screen *vs = virgl_screen(screen);
struct virgl_resource *res = virgl_resource(resource);
if (res->u.b.target == PIPE_BUFFER)
return FALSE;
return vs->vws->resource_get_handle(vs->vws, res->hw_res,
res->metadata.stride[0],
whandle);
}
void virgl_resource_dirty(struct virgl_resource *res, uint32_t level)
{
if (res) {
if (res->u.b.target == PIPE_BUFFER)
res->clean_mask &= ~1;
else
res->clean_mask &= ~(1 << level);
}
}
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