/*
 * Copyright © 2014 Broadcom
 *
 * 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 "util/u_math.h"
#include "util/ralloc.h"
#include "vc4_context.h"

void
vc4_init_cl(struct vc4_job *job, struct vc4_cl *cl)
{
        cl->base = rzalloc_size(job, 1); /* TODO: don't use rzalloc */
        cl->next = cl->base;
        cl->size = 0;
        cl->job = job;
}

void
cl_ensure_space(struct vc4_cl *cl, uint32_t space)
{
        uint32_t offset = cl_offset(cl);

        if (offset + space <= cl->size)
                return;

        uint32_t size = MAX2(cl->size + space, cl->size * 2);

        cl->base = reralloc(ralloc_parent(cl->base), cl->base, uint8_t, size);
        cl->size = size;
        cl->next = cl->base + offset;
}

void
vc4_reset_cl(struct vc4_cl *cl)
{
        assert(cl->reloc_count == 0);
        cl->next = cl->base;
}

uint32_t
vc4_gem_hindex(struct vc4_job *job, struct vc4_bo *bo)
{
        uint32_t hindex;
        uint32_t *current_handles = job->bo_handles.base;
        uint32_t cl_hindex_count = cl_offset(&job->bo_handles) / 4;
        uint32_t last_hindex = bo->last_hindex; /* volatile read! */

        if (last_hindex < cl_hindex_count &&
            current_handles[last_hindex] == bo->handle) {
                return last_hindex;
        }

        for (hindex = 0; hindex < cl_hindex_count; hindex++) {
                if (current_handles[hindex] == bo->handle) {
                        bo->last_hindex = hindex;
                        return hindex;
                }
        }

        struct vc4_cl_out *out;

        out = cl_start(&job->bo_handles);
        cl_u32(&out, bo->handle);
        cl_end(&job->bo_handles, out);

        out = cl_start(&job->bo_pointers);
        cl_ptr(&out, vc4_bo_reference(bo));
        cl_end(&job->bo_pointers, out);

        job->bo_space += bo->size;

        bo->last_hindex = hindex;
        return hindex;
}