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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_inlines.h"
#include "util/u_memory.h"
#include "virgl_context.h"
#include "virgl_encode.h"
#include "virgl_resource.h"
#include "virgl_screen.h"
static void *virgl_buffer_transfer_map(struct pipe_context *ctx,
struct pipe_resource *resource,
unsigned level,
unsigned usage,
const struct pipe_box *box,
struct pipe_transfer **transfer)
{
struct virgl_context *vctx = virgl_context(ctx);
struct virgl_screen *vs = virgl_screen(ctx->screen);
struct virgl_resource *vbuf = virgl_resource(resource);
struct virgl_transfer *trans;
enum virgl_transfer_map_type map_type;
void *map_addr;
trans = virgl_resource_create_transfer(vctx, resource,
&vbuf->metadata, level, usage, box);
map_type = virgl_resource_transfer_prepare(vctx, trans);
switch (map_type) {
case VIRGL_TRANSFER_MAP_REALLOC:
if (!virgl_resource_realloc(vctx, vbuf)) {
map_addr = NULL;
break;
}
vs->vws->resource_reference(vs->vws, &trans->hw_res, vbuf->hw_res);
/* fall through */
case VIRGL_TRANSFER_MAP_HW_RES:
trans->hw_res_map = vs->vws->resource_map(vs->vws, vbuf->hw_res);
if (trans->hw_res_map)
map_addr = trans->hw_res_map + trans->offset;
else
map_addr = NULL;
break;
case VIRGL_TRANSFER_MAP_STAGING:
map_addr = virgl_staging_map(vctx, trans);
/* Copy transfers don't make use of hw_res_map at the moment. */
trans->hw_res_map = NULL;
break;
case VIRGL_TRANSFER_MAP_ERROR:
default:
trans->hw_res_map = NULL;
map_addr = NULL;
break;
}
if (!map_addr) {
virgl_resource_destroy_transfer(vctx, trans);
return NULL;
}
/* For the checks below to be able to use 'usage', we assume that
* transfer preparation doesn't affect the usage.
*/
assert(usage == trans->base.usage);
/* If we are doing a whole resource discard with a hw_res map, the buffer
* storage can now be considered unused and we don't care about previous
* contents. We can thus mark the storage as uninitialized, but only if the
* buffer is not host writable (in which case we can't clear the valid
* range, since that would result in missed readbacks in future transfers).
* We only do this for VIRGL_TRANSFER_MAP_HW_RES, since for
* VIRGL_TRANSFER_MAP_REALLOC we already take care of the buffer range when
* reallocating and rebinding, and VIRGL_TRANSFER_MAP_STAGING is not
* currently used for whole resource discards.
*/
if (map_type == VIRGL_TRANSFER_MAP_HW_RES &&
(usage & PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE) &&
(vbuf->clean_mask & 1)) {
util_range_set_empty(&vbuf->valid_buffer_range);
}
if (usage & PIPE_TRANSFER_WRITE)
util_range_add(&vbuf->valid_buffer_range, box->x, box->x + box->width);
*transfer = &trans->base;
return map_addr;
}
static void virgl_buffer_transfer_unmap(struct pipe_context *ctx,
struct pipe_transfer *transfer)
{
struct virgl_context *vctx = virgl_context(ctx);
struct virgl_transfer *trans = virgl_transfer(transfer);
if (trans->base.usage & PIPE_TRANSFER_WRITE) {
if (transfer->usage & PIPE_TRANSFER_FLUSH_EXPLICIT) {
if (trans->range.end <= trans->range.start) {
virgl_resource_destroy_transfer(vctx, trans);
return;
}
transfer->box.x += trans->range.start;
transfer->box.width = trans->range.end - trans->range.start;
trans->offset = transfer->box.x;
}
if (trans->copy_src_hw_res) {
virgl_encode_copy_transfer(vctx, trans);
virgl_resource_destroy_transfer(vctx, trans);
} else {
virgl_transfer_queue_unmap(&vctx->queue, trans);
}
} else
virgl_resource_destroy_transfer(vctx, trans);
}
static void virgl_buffer_transfer_flush_region(struct pipe_context *ctx,
struct pipe_transfer *transfer,
const struct pipe_box *box)
{
struct virgl_transfer *trans = virgl_transfer(transfer);
/*
* FIXME: This is not optimal. For example,
*
* glMapBufferRange(.., 0, 100, GL_MAP_FLUSH_EXPLICIT_BIT)
* glFlushMappedBufferRange(.., 25, 30)
* glFlushMappedBufferRange(.., 65, 70)
*
* We'll end up flushing 25 --> 70.
*/
util_range_add(&trans->range, box->x, box->x + box->width);
}
static const struct u_resource_vtbl virgl_buffer_vtbl =
{
u_default_resource_get_handle, /* get_handle */
virgl_resource_destroy, /* resource_destroy */
virgl_buffer_transfer_map, /* transfer_map */
virgl_buffer_transfer_flush_region, /* transfer_flush_region */
virgl_buffer_transfer_unmap, /* transfer_unmap */
};
void virgl_buffer_init(struct virgl_resource *res)
{
res->u.vtbl = &virgl_buffer_vtbl;
}
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