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/*
* © Copyright 2018 Alyssa Rosenzweig
* Copyright (C) 2019 Collabora, Ltd.
*
* 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 (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 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.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <panfrost-misc.h>
#include <panfrost-job.h>
#include "pan_context.h"
/* TODO: What does this actually have to be? */
#define ALIGNMENT 128
/* Allocate a new transient slab */
static struct panfrost_bo *
panfrost_create_slab(struct panfrost_screen *screen, unsigned *index)
{
/* Allocate a new slab on the screen */
struct panfrost_bo **new =
util_dynarray_grow(&screen->transient_bo,
struct panfrost_bo *, 1);
struct panfrost_bo *alloc = panfrost_drm_create_bo(screen, TRANSIENT_SLAB_SIZE, 0);
*new = alloc;
/* Return the BO as well as the index we just added */
*index = util_dynarray_num_elements(&screen->transient_bo, void *) - 1;
return alloc;
}
/* Transient command stream pooling: command stream uploads try to simply copy
* into whereever we left off. If there isn't space, we allocate a new entry
* into the pool and copy there */
struct panfrost_transfer
panfrost_allocate_transient(struct panfrost_context *ctx, size_t sz)
{
struct panfrost_screen *screen = pan_screen(ctx->base.screen);
struct panfrost_job *batch = panfrost_get_job_for_fbo(ctx);
/* Pad the size */
sz = ALIGN_POT(sz, ALIGNMENT);
/* Find or create a suitable BO */
struct panfrost_bo *bo = NULL;
unsigned offset = 0;
bool update_offset = false;
pthread_mutex_lock(&screen->transient_lock);
bool has_current = batch->transient_indices.size;
bool fits_in_current = (batch->transient_offset + sz) < TRANSIENT_SLAB_SIZE;
if (likely(has_current && fits_in_current)) {
/* We can reuse the topmost BO, so get it */
unsigned idx = util_dynarray_top(&batch->transient_indices, unsigned);
bo = pan_bo_for_index(screen, idx);
/* Use the specified offset */
offset = batch->transient_offset;
update_offset = true;
} else if (sz < TRANSIENT_SLAB_SIZE) {
/* We can't reuse the topmost BO, but we can get a new one.
* First, look for a free slot */
unsigned count = util_dynarray_num_elements(&screen->transient_bo, void *);
unsigned index = 0;
unsigned free = __bitset_ffs(
screen->free_transient,
count / BITSET_WORDBITS);
if (likely(free)) {
/* Use this one */
index = free - 1;
/* It's ours, so no longer free */
BITSET_CLEAR(screen->free_transient, index);
/* Grab the BO */
bo = pan_bo_for_index(screen, index);
} else {
/* Otherwise, create a new BO */
bo = panfrost_create_slab(screen, &index);
}
panfrost_job_add_bo(batch, bo);
/* Remember we created this */
util_dynarray_append(&batch->transient_indices, unsigned, index);
update_offset = true;
} else {
/* Create a new BO and reference it */
bo = panfrost_drm_create_bo(screen, ALIGN_POT(sz, 4096), 0);
panfrost_job_add_bo(batch, bo);
/* Creating a BO adds a reference, and then the job adds a
* second one. So we need to pop back one reference */
panfrost_bo_unreference(&screen->base, bo);
}
struct panfrost_transfer ret = {
.cpu = bo->cpu + offset,
.gpu = bo->gpu + offset,
};
if (update_offset)
batch->transient_offset = offset + sz;
pthread_mutex_unlock(&screen->transient_lock);
return ret;
}
mali_ptr
panfrost_upload_transient(struct panfrost_context *ctx, const void *data, size_t sz)
{
struct panfrost_transfer transfer = panfrost_allocate_transient(ctx, sz);
memcpy(transfer.cpu, data, sz);
return transfer.gpu;
}
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