linux-hardened/drivers/gpu/drm/nouveau/nouveau_abi16.c
Marcin Slusarz 2b77c1c01b drm/nouveau: idle channel before releasing notify object
Unmapping it while it's still in use (e.g. by M2MF) can lead to page faults
and a lot of TRAP_M2MF spam in dmesg.

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2013-03-11 08:43:05 +10:00

495 lines
13 KiB
C

/*
* Copyright 2012 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 <core/object.h>
#include <core/client.h>
#include <core/device.h>
#include <core/class.h>
#include <core/mm.h>
#include <subdev/fb.h>
#include <subdev/timer.h>
#include <subdev/instmem.h>
#include "nouveau_drm.h"
#include "nouveau_dma.h"
#include "nouveau_gem.h"
#include "nouveau_chan.h"
#include "nouveau_abi16.h"
struct nouveau_abi16 *
nouveau_abi16_get(struct drm_file *file_priv, struct drm_device *dev)
{
struct nouveau_cli *cli = nouveau_cli(file_priv);
mutex_lock(&cli->mutex);
if (!cli->abi16) {
struct nouveau_abi16 *abi16;
cli->abi16 = abi16 = kzalloc(sizeof(*abi16), GFP_KERNEL);
if (cli->abi16) {
INIT_LIST_HEAD(&abi16->channels);
abi16->client = nv_object(cli);
/* allocate device object targeting client's default
* device (ie. the one that belongs to the fd it
* opened)
*/
if (nouveau_object_new(abi16->client, NVDRM_CLIENT,
NVDRM_DEVICE, 0x0080,
&(struct nv_device_class) {
.device = ~0ULL,
},
sizeof(struct nv_device_class),
&abi16->device) == 0)
return cli->abi16;
kfree(cli->abi16);
cli->abi16 = NULL;
}
mutex_unlock(&cli->mutex);
}
return cli->abi16;
}
int
nouveau_abi16_put(struct nouveau_abi16 *abi16, int ret)
{
struct nouveau_cli *cli = (void *)abi16->client;
mutex_unlock(&cli->mutex);
return ret;
}
u16
nouveau_abi16_swclass(struct nouveau_drm *drm)
{
switch (nv_device(drm->device)->card_type) {
case NV_04:
return 0x006e;
case NV_10:
case NV_20:
case NV_30:
case NV_40:
return 0x016e;
case NV_50:
return 0x506e;
case NV_C0:
case NV_D0:
case NV_E0:
return 0x906e;
}
return 0x0000;
}
static void
nouveau_abi16_ntfy_fini(struct nouveau_abi16_chan *chan,
struct nouveau_abi16_ntfy *ntfy)
{
nouveau_mm_free(&chan->heap, &ntfy->node);
list_del(&ntfy->head);
kfree(ntfy);
}
static void
nouveau_abi16_chan_fini(struct nouveau_abi16 *abi16,
struct nouveau_abi16_chan *chan)
{
struct nouveau_abi16_ntfy *ntfy, *temp;
/* wait for all activity to stop before releasing notify object, which
* may be still in use */
if (chan->chan && chan->ntfy)
nouveau_channel_idle(chan->chan);
/* cleanup notifier state */
list_for_each_entry_safe(ntfy, temp, &chan->notifiers, head) {
nouveau_abi16_ntfy_fini(chan, ntfy);
}
if (chan->ntfy) {
nouveau_bo_vma_del(chan->ntfy, &chan->ntfy_vma);
drm_gem_object_unreference_unlocked(chan->ntfy->gem);
}
if (chan->heap.block_size)
nouveau_mm_fini(&chan->heap);
/* destroy channel object, all children will be killed too */
if (chan->chan) {
abi16->handles &= ~(1 << (chan->chan->handle & 0xffff));
nouveau_channel_del(&chan->chan);
}
list_del(&chan->head);
kfree(chan);
}
void
nouveau_abi16_fini(struct nouveau_abi16 *abi16)
{
struct nouveau_cli *cli = (void *)abi16->client;
struct nouveau_abi16_chan *chan, *temp;
/* cleanup channels */
list_for_each_entry_safe(chan, temp, &abi16->channels, head) {
nouveau_abi16_chan_fini(abi16, chan);
}
/* destroy the device object */
nouveau_object_del(abi16->client, NVDRM_CLIENT, NVDRM_DEVICE);
kfree(cli->abi16);
cli->abi16 = NULL;
}
int
nouveau_abi16_ioctl_getparam(ABI16_IOCTL_ARGS)
{
struct nouveau_drm *drm = nouveau_drm(dev);
struct nouveau_device *device = nv_device(drm->device);
struct nouveau_timer *ptimer = nouveau_timer(device);
struct drm_nouveau_getparam *getparam = data;
switch (getparam->param) {
case NOUVEAU_GETPARAM_CHIPSET_ID:
getparam->value = device->chipset;
break;
case NOUVEAU_GETPARAM_PCI_VENDOR:
getparam->value = dev->pci_vendor;
break;
case NOUVEAU_GETPARAM_PCI_DEVICE:
getparam->value = dev->pci_device;
break;
case NOUVEAU_GETPARAM_BUS_TYPE:
if (drm_pci_device_is_agp(dev))
getparam->value = 0;
else
if (!pci_is_pcie(dev->pdev))
getparam->value = 1;
else
getparam->value = 2;
break;
case NOUVEAU_GETPARAM_FB_SIZE:
getparam->value = drm->gem.vram_available;
break;
case NOUVEAU_GETPARAM_AGP_SIZE:
getparam->value = drm->gem.gart_available;
break;
case NOUVEAU_GETPARAM_VM_VRAM_BASE:
getparam->value = 0; /* deprecated */
break;
case NOUVEAU_GETPARAM_PTIMER_TIME:
getparam->value = ptimer->read(ptimer);
break;
case NOUVEAU_GETPARAM_HAS_BO_USAGE:
getparam->value = 1;
break;
case NOUVEAU_GETPARAM_HAS_PAGEFLIP:
getparam->value = 1;
break;
case NOUVEAU_GETPARAM_GRAPH_UNITS:
/* NV40 and NV50 versions are quite different, but register
* address is the same. User is supposed to know the card
* family anyway... */
if (device->chipset >= 0x40) {
getparam->value = nv_rd32(device, 0x001540);
break;
}
/* FALLTHRU */
default:
nv_debug(device, "unknown parameter %lld\n", getparam->param);
return -EINVAL;
}
return 0;
}
int
nouveau_abi16_ioctl_setparam(ABI16_IOCTL_ARGS)
{
return -EINVAL;
}
int
nouveau_abi16_ioctl_channel_alloc(ABI16_IOCTL_ARGS)
{
struct drm_nouveau_channel_alloc *init = data;
struct nouveau_cli *cli = nouveau_cli(file_priv);
struct nouveau_drm *drm = nouveau_drm(dev);
struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv, dev);
struct nouveau_abi16_chan *chan;
struct nouveau_client *client;
struct nouveau_device *device;
struct nouveau_instmem *imem;
struct nouveau_fb *pfb;
int ret;
if (unlikely(!abi16))
return -ENOMEM;
if (!drm->channel)
return nouveau_abi16_put(abi16, -ENODEV);
client = nv_client(abi16->client);
device = nv_device(abi16->device);
imem = nouveau_instmem(device);
pfb = nouveau_fb(device);
/* hack to allow channel engine type specification on kepler */
if (device->card_type >= NV_E0) {
if (init->fb_ctxdma_handle != ~0)
init->fb_ctxdma_handle = NVE0_CHANNEL_IND_ENGINE_GR;
else
init->fb_ctxdma_handle = init->tt_ctxdma_handle;
/* allow flips to be executed if this is a graphics channel */
init->tt_ctxdma_handle = 0;
if (init->fb_ctxdma_handle == NVE0_CHANNEL_IND_ENGINE_GR)
init->tt_ctxdma_handle = 1;
}
if (init->fb_ctxdma_handle == ~0 || init->tt_ctxdma_handle == ~0)
return nouveau_abi16_put(abi16, -EINVAL);
/* allocate "abi16 channel" data and make up a handle for it */
init->channel = ffsll(~abi16->handles);
if (!init->channel--)
return nouveau_abi16_put(abi16, -ENOSPC);
chan = kzalloc(sizeof(*chan), GFP_KERNEL);
if (!chan)
return nouveau_abi16_put(abi16, -ENOMEM);
INIT_LIST_HEAD(&chan->notifiers);
list_add(&chan->head, &abi16->channels);
abi16->handles |= (1 << init->channel);
/* create channel object and initialise dma and fence management */
ret = nouveau_channel_new(drm, cli, NVDRM_DEVICE, NVDRM_CHAN |
init->channel, init->fb_ctxdma_handle,
init->tt_ctxdma_handle, &chan->chan);
if (ret)
goto done;
if (device->card_type >= NV_50)
init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_VRAM |
NOUVEAU_GEM_DOMAIN_GART;
else
if (chan->chan->push.buffer->bo.mem.mem_type == TTM_PL_VRAM)
init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_VRAM;
else
init->pushbuf_domains = NOUVEAU_GEM_DOMAIN_GART;
if (device->card_type < NV_C0) {
init->subchan[0].handle = 0x00000000;
init->subchan[0].grclass = 0x0000;
init->subchan[1].handle = NvSw;
init->subchan[1].grclass = 0x506e;
init->nr_subchan = 2;
}
/* Named memory object area */
ret = nouveau_gem_new(dev, PAGE_SIZE, 0, NOUVEAU_GEM_DOMAIN_GART,
0, 0, &chan->ntfy);
if (ret == 0)
ret = nouveau_bo_pin(chan->ntfy, TTM_PL_FLAG_TT);
if (ret)
goto done;
if (device->card_type >= NV_50) {
ret = nouveau_bo_vma_add(chan->ntfy, client->vm,
&chan->ntfy_vma);
if (ret)
goto done;
}
ret = drm_gem_handle_create(file_priv, chan->ntfy->gem,
&init->notifier_handle);
if (ret)
goto done;
ret = nouveau_mm_init(&chan->heap, 0, PAGE_SIZE, 1);
done:
if (ret)
nouveau_abi16_chan_fini(abi16, chan);
return nouveau_abi16_put(abi16, ret);
}
int
nouveau_abi16_ioctl_channel_free(ABI16_IOCTL_ARGS)
{
struct drm_nouveau_channel_free *req = data;
struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv, dev);
struct nouveau_abi16_chan *chan;
int ret = -ENOENT;
if (unlikely(!abi16))
return -ENOMEM;
list_for_each_entry(chan, &abi16->channels, head) {
if (chan->chan->handle == (NVDRM_CHAN | req->channel)) {
nouveau_abi16_chan_fini(abi16, chan);
return nouveau_abi16_put(abi16, 0);
}
}
return nouveau_abi16_put(abi16, ret);
}
int
nouveau_abi16_ioctl_grobj_alloc(ABI16_IOCTL_ARGS)
{
struct drm_nouveau_grobj_alloc *init = data;
struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv, dev);
struct nouveau_drm *drm = nouveau_drm(dev);
struct nouveau_object *object;
int ret;
if (unlikely(!abi16))
return -ENOMEM;
if (init->handle == ~0)
return nouveau_abi16_put(abi16, -EINVAL);
/* compatibility with userspace that assumes 506e for all chipsets */
if (init->class == 0x506e) {
init->class = nouveau_abi16_swclass(drm);
if (init->class == 0x906e)
return nouveau_abi16_put(abi16, 0);
}
ret = nouveau_object_new(abi16->client, NVDRM_CHAN | init->channel,
init->handle, init->class, NULL, 0, &object);
return nouveau_abi16_put(abi16, ret);
}
int
nouveau_abi16_ioctl_notifierobj_alloc(ABI16_IOCTL_ARGS)
{
struct drm_nouveau_notifierobj_alloc *info = data;
struct nouveau_drm *drm = nouveau_drm(dev);
struct nouveau_device *device = nv_device(drm->device);
struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv, dev);
struct nouveau_abi16_chan *chan, *temp;
struct nouveau_abi16_ntfy *ntfy;
struct nouveau_object *object;
struct nv_dma_class args = {};
int ret;
if (unlikely(!abi16))
return -ENOMEM;
/* completely unnecessary for these chipsets... */
if (unlikely(nv_device(abi16->device)->card_type >= NV_C0))
return nouveau_abi16_put(abi16, -EINVAL);
list_for_each_entry_safe(chan, temp, &abi16->channels, head) {
if (chan->chan->handle == (NVDRM_CHAN | info->channel))
break;
chan = NULL;
}
if (!chan)
return nouveau_abi16_put(abi16, -ENOENT);
ntfy = kzalloc(sizeof(*ntfy), GFP_KERNEL);
if (!ntfy)
return nouveau_abi16_put(abi16, -ENOMEM);
list_add(&ntfy->head, &chan->notifiers);
ntfy->handle = info->handle;
ret = nouveau_mm_head(&chan->heap, 1, info->size, info->size, 1,
&ntfy->node);
if (ret)
goto done;
args.start = ntfy->node->offset;
args.limit = ntfy->node->offset + ntfy->node->length - 1;
if (device->card_type >= NV_50) {
args.flags = NV_DMA_TARGET_VM | NV_DMA_ACCESS_VM;
args.start += chan->ntfy_vma.offset;
args.limit += chan->ntfy_vma.offset;
} else
if (drm->agp.stat == ENABLED) {
args.flags = NV_DMA_TARGET_AGP | NV_DMA_ACCESS_RDWR;
args.start += drm->agp.base + chan->ntfy->bo.offset;
args.limit += drm->agp.base + chan->ntfy->bo.offset;
} else {
args.flags = NV_DMA_TARGET_VM | NV_DMA_ACCESS_RDWR;
args.start += chan->ntfy->bo.offset;
args.limit += chan->ntfy->bo.offset;
}
ret = nouveau_object_new(abi16->client, chan->chan->handle,
ntfy->handle, 0x003d, &args,
sizeof(args), &object);
if (ret)
goto done;
done:
if (ret)
nouveau_abi16_ntfy_fini(chan, ntfy);
return nouveau_abi16_put(abi16, ret);
}
int
nouveau_abi16_ioctl_gpuobj_free(ABI16_IOCTL_ARGS)
{
struct drm_nouveau_gpuobj_free *fini = data;
struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv, dev);
struct nouveau_abi16_chan *chan, *temp;
struct nouveau_abi16_ntfy *ntfy;
int ret;
if (unlikely(!abi16))
return -ENOMEM;
list_for_each_entry_safe(chan, temp, &abi16->channels, head) {
if (chan->chan->handle == (NVDRM_CHAN | fini->channel))
break;
chan = NULL;
}
if (!chan)
return nouveau_abi16_put(abi16, -ENOENT);
/* synchronize with the user channel and destroy the gpu object */
nouveau_channel_idle(chan->chan);
ret = nouveau_object_del(abi16->client, chan->chan->handle, fini->handle);
if (ret)
return nouveau_abi16_put(abi16, ret);
/* cleanup extra state if this object was a notifier */
list_for_each_entry(ntfy, &chan->notifiers, head) {
if (ntfy->handle == fini->handle) {
nouveau_mm_free(&chan->heap, &ntfy->node);
list_del(&ntfy->head);
break;
}
}
return nouveau_abi16_put(abi16, 0);
}