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/*
* Copyright 2017 Red Hat Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* Authors: Jérôme Glisse <jglisse@redhat.com>
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/cdev.h>
#include <linux/slab.h>
#include <linux/fs.h>
#include <uapi/drm/compote-uapi.h>
#include "compote.h"
#include <nvif/driver.h>
#include <nvif/class.h>
#include <nvif/cla06f.h>
#include "nouveau_ttm.h"
#include "nouveau_chan.h"
#include "nouveau_usif.h"
#include "nouveau_abi16.h"
#include "nouveau_bo.h"
int compote_channel_new(struct compote_channel **channelp,
struct compote_file *cfile)
{
uint32_t fb_ctxdma_handle, tt_ctxdma_handle;
struct compote_channel *channel;
struct nvif_device *nvifdevice;
struct nouveau_drm *nvdrm;
int ret;
*channelp = NULL;
channel = kzalloc(sizeof(*channel), GFP_KERNEL);
if (channel == NULL)
return -ENOMEM;
channel->cfile = cfile;
kref_init(&channel->kref);
/* create channel object and initialise dma and fence management */
tt_ctxdma_handle = 0;
nvdrm = cfile->cdevice->nvdrm;
nvifdevice = &cfile->nvclient.device;
fb_ctxdma_handle = NVA06F_V0_ENGINE_GR;
ret = nouveau_channel_new(nvdrm, nvifdevice,
fb_ctxdma_handle,
tt_ctxdma_handle,
&channel->nvchan);
if (ret)
goto error;
*channelp = channel;
return 0;
error:
kfree(channel);
return ret;
}
static void compote_channel_kref_put(struct kref *kref)
{
struct compote_channel *channel;
struct compote_file *cfile;
channel = container_of(kref, struct compote_channel, kref);
cfile = channel->cfile;
/*
* Wait for all activity to stop before releasing notify object, which
* may be still in use.
*/
nouveau_channel_idle(channel->nvchan);
nouveau_channel_del(&channel->nvchan);
down_write(&cfile->rwsem);
list_del_init(&channel->list);
up_write(&cfile->rwsem);
kfree(channel);
}
void compote_channel_ref(struct compote_channel *channel)
{
kref_get(&channel->kref);
}
void compote_channel_unref(struct compote_channel *channel)
{
kref_put(&channel->kref, compote_channel_kref_put);
}
int compote_ioctl_channel_alloc(struct compote_file *cfile, void __user *uarg)
{
struct compote_ioctl_channel_alloc arg;
struct compote_channel *channel;
int ret;
ret = compote_channel_new(&channel, cfile);
if (ret)
return ret;
arg.channel = channel->nvchan->chid;
ret = copy_to_user(uarg, &arg, sizeof(arg));
if (ret) {
compote_channel_unref(channel);
return ret;
}
down_write(&cfile->rwsem);
list_add_tail(&channel->list, &cfile->channels);
up_write(&cfile->rwsem);
return 0;
}
int compote_ioctl_channel_free(struct compote_file *cfile,
void __user *uarg)
{
struct compote_ioctl_channel_free arg;
struct compote_channel *channel;
int ret;
ret = copy_from_user(&arg, uarg, sizeof(arg));
if (ret)
return ret;
down_write(&cfile->rwsem);
list_for_each_entry (channel, &cfile->channels, list) {
if (channel->nvchan->chid == arg.channel) {
compote_channel_ref(channel);
up_write(&cfile->rwsem);
compote_channel_unref(channel);
compote_channel_unref(channel);
return 0;
}
}
up_write(&cfile->rwsem);
return -EINVAL;
}
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