/*
 * Copyright 2018 Red Hat Inc.
 *
 * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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 <nvif/fifo.h>

static int
nvif_fifo_runlists(struct nvif_device *device)
{
        struct nvif_object *object = &device->object;
        TRAILING_OVERLAP(struct nv_device_info_v1, m, data,
                struct {
                        struct nv_device_info_v1_data runlists;
                        struct nv_device_info_v1_data runlist[64];
                } v;
        ) *a;
        int ret, i;

        if (device->runlist)
                return 0;

        if (!(a = kmalloc_obj(*a)))
                return -ENOMEM;
        a->m.version = 1;
        a->m.count = sizeof(a->v) / sizeof(a->v.runlists);
        a->v.runlists.mthd = NV_DEVICE_HOST_RUNLISTS;
        for (i = 0; i < ARRAY_SIZE(a->v.runlist); i++) {
                a->v.runlist[i].mthd = NV_DEVICE_HOST_RUNLIST_ENGINES;
                a->v.runlist[i].data = i;
        }

        ret = nvif_object_mthd(object, NV_DEVICE_V0_INFO, a, sizeof(*a));
        if (ret)
                goto done;

        device->runlists = fls64(a->v.runlists.data);
        device->runlist = kzalloc_objs(*device->runlist, device->runlists);
        if (!device->runlist) {
                ret = -ENOMEM;
                goto done;
        }

        for (i = 0; i < device->runlists; i++) {
                if (a->v.runlist[i].mthd != NV_DEVICE_INFO_INVALID)
                        device->runlist[i].engines = a->v.runlist[i].data;
        }

done:
        kfree(a);
        return ret;
}

u64
nvif_fifo_runlist(struct nvif_device *device, u64 engine)
{
        u64 runm = 0;
        int ret, i;

        if ((ret = nvif_fifo_runlists(device)))
                return runm;

        for (i = 0; i < device->runlists; i++) {
                if (device->runlist[i].engines & engine)
                        runm |= BIT_ULL(i);
        }

        return runm;
}