/*
* Copyright 2021 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.
*/
#define nvkm_uchan(p) container_of((p), struct nvkm_uchan, object)
#include "priv.h"
#include "cgrp.h"
#include "chan.h"
#include "chid.h"
#include "runl.h"
#include <core/gpuobj.h>
#include <core/oproxy.h>
#include <subdev/mmu.h>
#include <engine/dma.h>
#include <nvif/if0020.h>
struct nvkm_uchan {
struct nvkm_object object;
struct nvkm_chan *chan;
};
static int
nvkm_uchan_uevent(struct nvkm_object *object, void *argv, u32 argc, struct nvkm_uevent *uevent)
{
struct nvkm_chan *chan = nvkm_uchan(object)->chan;
struct nvkm_runl *runl = chan->cgrp->runl;
union nvif_chan_event_args *args = argv;
if (!uevent)
return 0;
if (argc != sizeof(args->v0) || args->v0.version != 0)
return -ENOSYS;
switch (args->v0.type) {
case NVIF_CHAN_EVENT_V0_NON_STALL_INTR:
return nvkm_uevent_add(uevent, &runl->fifo->nonstall.event, runl->id,
NVKM_FIFO_NONSTALL_EVENT, NULL);
case NVIF_CHAN_EVENT_V0_KILLED:
return nvkm_uevent_add(uevent, &runl->chid->event, chan->id,
NVKM_CHAN_EVENT_ERRORED, NULL);
default:
break;
}
return -ENOSYS;
}
struct nvkm_uobj {
struct nvkm_oproxy oproxy;
struct nvkm_chan *chan;
struct nvkm_cctx *cctx;
int hash;
};
static int
nvkm_uchan_object_fini_1(struct nvkm_oproxy *oproxy, bool suspend)
{
struct nvkm_uobj *uobj = container_of(oproxy, typeof(*uobj), oproxy);
struct nvkm_chan *chan = uobj->chan;
struct nvkm_cctx *cctx = uobj->cctx;
struct nvkm_ectx *ectx = cctx->vctx->ectx;
if (!ectx->object)
return 0;
/* Unbind engine context from channel, if no longer required. */
if (refcount_dec_and_mutex_lock(&cctx->uses, &chan->cgrp->mutex)) {
nvkm_chan_cctx_bind(chan, ectx->engn, NULL);
if (refcount_dec_and_test(&ectx->uses))
nvkm_object_fini(ectx->object, false);
mutex_unlock(&chan->cgrp->mutex);
}
return 0;
}
static int
nvkm_uchan_object_init_0(struct nvkm_oproxy *oproxy)
{
struct nvkm_uobj *uobj = container_of(oproxy, typeof(*uobj), oproxy);
struct nvkm_chan *chan = uobj->chan;
struct nvkm_cctx *cctx = uobj->cctx;
struct nvkm_ectx *ectx = cctx->vctx->ectx;
int ret = 0;
if (!ectx->object)
return 0;
/* Bind engine context to channel, if it hasn't been already. */
if (!refcount_inc_not_zero(&cctx->uses)) {
mutex_lock(&chan->cgrp->mutex);
if (!refcount_inc_not_zero(&cctx->uses)) {
if (!refcount_inc_not_zero(&ectx->uses)) {
ret = nvkm_object_init(ectx->object);
if (ret == 0)
refcount_set(&ectx->uses, 1);
}
if (ret == 0) {
nvkm_chan_cctx_bind(chan, ectx->engn, cctx);
refcount_set(&cctx->uses, 1);
}
}
mutex_unlock(&chan->cgrp->mutex);
}
return ret;
}
static void
nvkm_uchan_object_dtor(struct nvkm_oproxy *oproxy)
{
struct nvkm_uobj *uobj = container_of(oproxy, typeof(*uobj), oproxy);
struct nvkm_engn *engn;
if (!uobj->cctx)
return;
engn = uobj->cctx->vctx->ectx->engn;
if (engn->func->ramht_del)
engn->func->ramht_del(uobj->chan, uobj->hash);
nvkm_chan_cctx_put(uobj->chan, &uobj->cctx);
}
static const struct nvkm_oproxy_func
nvkm_uchan_object = {
.dtor[1] = nvkm_uchan_object_dtor,
.init[0] = nvkm_uchan_object_init_0,
.fini[1] = nvkm_uchan_object_fini_1,
};
static int
nvkm_uchan_object_new(const struct nvkm_oclass *oclass, void *argv, u32 argc,
struct nvkm_object **pobject)
{
struct nvkm_chan *chan = nvkm_uchan(oclass->parent)->chan;
struct nvkm_cgrp *cgrp = chan->cgrp;
struct nvkm_engn *engn;
struct nvkm_uobj *uobj;
int ret;
/* Lookup host engine state for target engine. */
engn = nvkm_runl_find_engn(engn, cgrp->runl, engn->engine == oclass->engine);
if (WARN_ON(!engn))
return -EINVAL;
/* Allocate SW object. */
if (!(uobj = kzalloc(sizeof(*uobj), GFP_KERNEL)))
return -ENOMEM;
nvkm_oproxy_ctor(&nvkm_uchan_object, oclass, &uobj->oproxy);
uobj->chan = chan;
*pobject = &uobj->oproxy.base;
/* Ref. channel context for target engine.*/
ret = nvkm_chan_cctx_get(chan, engn, &uobj->cctx, oclass->client);
if (ret)
return ret;
/* Allocate HW object. */
ret = oclass->base.ctor(&(const struct nvkm_oclass) {
.base = oclass->base,
.engn = oclass->engn,
.handle = oclass->handle,
.object = oclass->object,
.client = oclass->client,
.parent = uobj->cctx->vctx->ectx->object ?: oclass->parent,
.engine = engn->engine,
}, argv, argc, &uobj->oproxy.object);
if (ret)
return ret;
if (engn->func->ramht_add) {
uobj->hash = engn->func->ramht_add(engn, uobj->oproxy.object, uobj->chan);
if (uobj->hash < 0)
return uobj->hash;
}
return 0;
}
static int
nvkm_uchan_sclass(struct nvkm_object *object, int index, struct nvkm_oclass *oclass)
{
struct nvkm_chan *chan = nvkm_uchan(object)->chan;
struct nvkm_engn *engn;
int ret, runq = 0;
nvkm_runl_foreach_engn(engn, chan->cgrp->runl) {
struct nvkm_engine *engine = engn->engine;
int c = 0;
/* Each runqueue, on runlists with multiple, has its own LCE. */
if (engn->runl->func->runqs) {
if (engine->subdev.type == NVKM_ENGINE_CE) {
if (chan->runq != runq++)
continue;
}
}
oclass->engine = engine;
oclass->base.oclass = 0;
if (engine->func->fifo.sclass) {
ret = engine->func->fifo.sclass(oclass, index);
if (oclass->base.oclass) {
if (!oclass->base.ctor)
oclass->base.ctor = nvkm_object_new;
oclass->ctor = nvkm_uchan_object_new;
return 0;
}
index -= ret;
continue;
}
while (engine->func->sclass[c].oclass) {
if (c++ == index) {
oclass->base = engine->func->sclass[index];
if (!oclass->base.ctor)
oclass->base.ctor = nvkm_object_new;
oclass->ctor = nvkm_uchan_object_new;
return 0;
}
}
index -= c;
}
return -EINVAL;
}
static int
nvkm_uchan_map(struct nvkm_object *object, void *argv, u32 argc,
enum nvkm_object_map *type, u64 *addr, u64 *size)
{
struct nvkm_chan *chan = nvkm_uchan(object)->chan;
struct nvkm_device *device = chan->cgrp->runl->fifo->engine.subdev.device;
if (chan->func->userd->bar < 0)
return -ENOSYS;
*type = NVKM_OBJECT_MAP_IO;
*addr = device->func->resource_addr(device, chan->func->userd->bar) +
chan->func->userd->base + chan->userd.base;
*size = chan->func->userd->size;
return 0;
}
static int
nvkm_uchan_fini(struct nvkm_object *object, bool suspend)
{
struct nvkm_chan *chan = nvkm_uchan(object)->chan;
nvkm_chan_block(chan);
nvkm_chan_remove(chan, true);
if (chan->func->unbind)
chan->func->unbind(chan);
return 0;
}
static int
nvkm_uchan_init(struct nvkm_object *object)
{
struct nvkm_chan *chan = nvkm_uchan(object)->chan;
if (atomic_read(&chan->errored))
return 0;
if (chan->func->bind)
chan->func->bind(chan);
nvkm_chan_allow(chan);
nvkm_chan_insert(chan);
return 0;
}
static void *
nvkm_uchan_dtor(struct nvkm_object *object)
{
struct nvkm_uchan *uchan = nvkm_uchan(object);
nvkm_chan_del(&uchan->chan);
return uchan;
}
static const struct nvkm_object_func
nvkm_uchan = {
.dtor = nvkm_uchan_dtor,
.init = nvkm_uchan_init,
.fini = nvkm_uchan_fini,
.map = nvkm_uchan_map,
.sclass = nvkm_uchan_sclass,
.uevent = nvkm_uchan_uevent,
};
struct nvkm_chan *
nvkm_uchan_chan(struct nvkm_object *object)
{
if (WARN_ON(object->func != &nvkm_uchan))
return NULL;
return nvkm_uchan(object)->chan;
}
int
nvkm_uchan_new(struct nvkm_fifo *fifo, struct nvkm_cgrp *cgrp, const struct nvkm_oclass *oclass,
void *argv, u32 argc, struct nvkm_object **pobject)
{
union nvif_chan_args *args = argv;
struct nvkm_runl *runl;
struct nvkm_vmm *vmm = NULL;
struct nvkm_dmaobj *ctxdma = NULL;
struct nvkm_memory *userd = NULL;
struct nvkm_uchan *uchan;
struct nvkm_chan *chan;
int ret;
if (argc < sizeof(args->v0) || args->v0.version != 0)
return -ENOSYS;
argc -= sizeof(args->v0);
if (args->v0.namelen != argc)
return -EINVAL;
/* Lookup objects referenced in args. */
runl = nvkm_runl_get(fifo, args->v0.runlist, 0);
if (!runl)
return -EINVAL;
if (args->v0.vmm) {
vmm = nvkm_uvmm_search(oclass->client, args->v0.vmm);
if (IS_ERR(vmm))
return PTR_ERR(vmm);
}
if (args->v0.ctxdma) {
ctxdma = nvkm_dmaobj_search(oclass->client, args->v0.ctxdma);
if (IS_ERR(ctxdma)) {
ret = PTR_ERR(ctxdma);
goto done;
}
}
if (args->v0.huserd) {
userd = nvkm_umem_search(oclass->client, args->v0.huserd);
if (IS_ERR(userd)) {
ret = PTR_ERR(userd);
userd = NULL;
goto done;
}
}
/* Allocate channel. */
if (!(uchan = kzalloc(sizeof(*uchan), GFP_KERNEL))) {
ret = -ENOMEM;
goto done;
}
nvkm_object_ctor(&nvkm_uchan, oclass, &uchan->object);
*pobject = &uchan->object;
ret = nvkm_chan_new_(fifo->func->chan.func, runl, args->v0.runq, cgrp, args->v0.name,
args->v0.priv != 0, args->v0.devm, vmm, ctxdma, args->v0.offset,
args->v0.length, userd, args->v0.ouserd, &uchan->chan);
if (ret)
goto done;
chan = uchan->chan;
/* Return channel info to caller. */
if (chan->func->doorbell_handle)
args->v0.token = chan->func->doorbell_handle(chan);
else
args->v0.token = ~0;
args->v0.chid = chan->id;
switch (nvkm_memory_target(chan->inst->memory)) {
case NVKM_MEM_TARGET_INST: args->v0.aper = NVIF_CHAN_V0_INST_APER_INST; break;
case NVKM_MEM_TARGET_VRAM: args->v0.aper = NVIF_CHAN_V0_INST_APER_VRAM; break;
case NVKM_MEM_TARGET_HOST: args->v0.aper = NVIF_CHAN_V0_INST_APER_HOST; break;
case NVKM_MEM_TARGET_NCOH: args->v0.aper = NVIF_CHAN_V0_INST_APER_NCOH; break;
default:
WARN_ON(1);
ret = -EFAULT;
break;
}
args->v0.inst = nvkm_memory_addr(chan->inst->memory);
done:
nvkm_memory_unref(&userd);
nvkm_vmm_unref(&vmm);
return ret;
}
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