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/*
* Copyright (c) 2008-2024 Broadcom. All Rights Reserved.
* The term “Broadcom” refers to Broadcom Inc.
* and/or its subsidiaries.
* SPDX-License-Identifier: MIT
*/
#include "svga_cmd.h"
#include "pipe/p_state.h"
#include "pipe/p_defines.h"
#include "util/u_inlines.h"
#include "util/u_thread.h"
#include "util/format/u_format.h"
#include "util/u_math.h"
#include "util/u_memory.h"
#include "util/u_string.h"
#include "svga_format.h"
#include "svga_screen.h"
#include "svga_context.h"
#include "svga_resource_texture.h"
#include "svga_sampler_view.h"
#include "svga_debug.h"
#include "svga_surface.h"
void
svga_debug_describe_sampler_view(char *buf, const struct svga_sampler_view *sv)
{
char res[128];
debug_describe_resource(res, sv->texture);
sprintf(buf, "svga_sampler_view<%s,[%u,%u]>",
res, sv->min_lod, sv->max_lod);
}
struct svga_sampler_view *
svga_get_tex_sampler_view(struct pipe_context *pipe,
struct pipe_resource *pt,
unsigned min_lod, unsigned max_lod)
{
struct svga_context *svga = svga_context(pipe);
struct svga_screen *ss = svga_screen(pipe->screen);
struct svga_texture *tex = svga_texture(pt);
struct svga_sampler_view *sv = NULL;
SVGA3dSurface1Flags flags = SVGA3D_SURFACE_HINT_TEXTURE;
SVGA3dSurfaceFormat format = svga_translate_format(ss, pt->format,
PIPE_BIND_SAMPLER_VIEW);
bool view = true;
assert(pt);
assert(min_lod <= max_lod);
assert(max_lod <= pt->last_level);
assert(!svga_have_vgpu10(svga));
/* Is a view needed */
{
/*
* Can't control max lod. For first level views and when we only
* look at one level we disable mip filtering to achive the same
* results as a view.
*/
if (min_lod == 0 && max_lod >= pt->last_level)
view = false;
if (ss->debug.no_sampler_view)
view = false;
if (ss->debug.force_sampler_view)
view = true;
}
/* First try the cache */
if (view) {
mtx_lock(&ss->tex_mutex);
if (tex->cached_view &&
tex->cached_view->min_lod == min_lod &&
tex->cached_view->max_lod == max_lod) {
svga_sampler_view_reference(&sv, tex->cached_view);
mtx_unlock(&ss->tex_mutex);
SVGA_DBG(DEBUG_VIEWS, "svga: Sampler view: reuse %p, %u %u, last %u\n",
pt, min_lod, max_lod, pt->last_level);
svga_validate_sampler_view(svga_context(pipe), sv);
return sv;
}
mtx_unlock(&ss->tex_mutex);
}
sv = CALLOC_STRUCT(svga_sampler_view);
if (!sv)
return NULL;
pipe_reference_init(&sv->reference, 1);
/* Note: we're not refcounting the texture resource here to avoid
* a circular dependency.
*/
sv->texture = pt;
sv->min_lod = min_lod;
sv->max_lod = max_lod;
/* No view needed just use the whole texture */
if (!view) {
SVGA_DBG(DEBUG_VIEWS,
"svga: Sampler view: no %p, mips %u..%u, nr %u, size (%ux%ux%u), last %u\n",
pt, min_lod, max_lod,
max_lod - min_lod + 1,
pt->width0,
pt->height0,
pt->depth0,
pt->last_level);
sv->key.cachable = 0;
sv->handle = tex->handle;
debug_reference(&sv->reference,
(debug_reference_descriptor)svga_debug_describe_sampler_view, 0);
return sv;
}
SVGA_DBG(DEBUG_VIEWS,
"svga: Sampler view: yes %p, mips %u..%u, nr %u, size (%ux%ux%u), last %u\n",
pt, min_lod, max_lod,
max_lod - min_lod + 1,
pt->width0,
pt->height0,
pt->depth0,
pt->last_level);
sv->age = tex->age;
sv->handle = svga_texture_view_surface(svga, tex,
PIPE_BIND_SAMPLER_VIEW,
flags, format,
min_lod,
max_lod - min_lod + 1,
-1, 1, -1, false,
&sv->key);
if (!sv->handle) {
sv->key.cachable = 0;
sv->handle = tex->handle;
debug_reference(&sv->reference,
(debug_reference_descriptor)
svga_debug_describe_sampler_view, 0);
return sv;
}
mtx_lock(&ss->tex_mutex);
svga_sampler_view_reference(&tex->cached_view, sv);
mtx_unlock(&ss->tex_mutex);
debug_reference(&sv->reference,
(debug_reference_descriptor)
svga_debug_describe_sampler_view, 0);
return sv;
}
void
svga_validate_sampler_view(struct svga_context *svga,
struct svga_sampler_view *v)
{
struct svga_texture *tex = svga_texture(v->texture);
unsigned numFaces;
unsigned age = 0;
int i;
unsigned k;
assert(svga);
assert(!svga_have_vgpu10(svga));
if (v->handle == tex->handle)
return;
age = tex->age;
if (tex->b.target == PIPE_TEXTURE_CUBE)
numFaces = 6;
else
numFaces = 1;
for (i = v->min_lod; i <= v->max_lod; i++) {
for (k = 0; k < numFaces; k++) {
assert(i < ARRAY_SIZE(tex->view_age));
if (v->age < tex->view_age[i])
svga_texture_copy_handle(svga,
tex->handle, 0, 0, 0, i, k,
v->handle, 0, 0, 0, i - v->min_lod, k,
u_minify(tex->b.width0, i),
u_minify(tex->b.height0, i),
u_minify(tex->b.depth0, i));
}
}
v->age = age;
}
void
svga_destroy_sampler_view_priv(struct svga_sampler_view *v)
{
struct svga_texture *tex = svga_texture(v->texture);
if (v->handle != tex->handle) {
struct svga_screen *ss = svga_screen(v->texture->screen);
SVGA_DBG(DEBUG_DMA, "unref sid %p (sampler view)\n", v->handle);
svga_screen_surface_destroy(ss, &v->key,
svga_was_texture_rendered_to(tex),
&v->handle);
}
/* Note: we're not refcounting the texture resource here to avoid
* a circular dependency.
*/
v->texture = NULL;
FREE(v);
}
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