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drm/linux-core/drm_bo.c

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/**************************************************************************
*
* Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND., USA
* All Rights Reserved.
*
* 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, sub license, 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 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 NON-INFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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.
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
*
**************************************************************************/
/*
* Authors: Thomas Hellström <thomas-at-tungstengraphics-dot-com>
*/
#include "drmP.h"
/*
* Buffer object locking policy:
* Lock dev->struct_mutex;
* Increase usage
* Unlock dev->struct_mutex;
* Lock buffer->mutex;
* Do whatever you want;
* Unlock buffer->mutex;
* Decrease usage. Call destruction if zero.
*
* User object visibility ups usage just once, since it has its own
* refcounting.
*
* Destruction:
* lock dev->struct_mutex;
* Verify that usage is zero. Otherwise unlock and continue.
* Destroy object.
* unlock dev->struct_mutex;
*
* Mutex and spinlock locking orders:
* 1.) Buffer mutex
* 2.) Refer to ttm locking orders.
*/
#define DRM_FLAG_MASKED(_old, _new, _mask) {\
(_old) ^= (((_old) ^ (_new)) & (_mask)); \
}
static inline uint32_t drm_bo_type_flags(unsigned type)
{
return (1 << (24 + type));
}
static inline drm_buffer_object_t *drm_bo_entry(struct list_head *list,
unsigned type)
{
switch (type) {
case DRM_BO_MEM_LOCAL:
case DRM_BO_MEM_TT:
return list_entry(list, drm_buffer_object_t, lru_ttm);
case DRM_BO_MEM_VRAM:
case DRM_BO_MEM_VRAM_NM:
return list_entry(list, drm_buffer_object_t, lru_card);
default:
BUG_ON(1);
}
return NULL;
}
static inline drm_mm_node_t *drm_bo_mm_node(drm_buffer_object_t * bo,
unsigned type)
{
switch (type) {
case DRM_BO_MEM_LOCAL:
case DRM_BO_MEM_TT:
return bo->node_ttm;
case DRM_BO_MEM_VRAM:
case DRM_BO_MEM_VRAM_NM:
return bo->node_card;
default:
BUG_ON(1);
}
return NULL;
}
/*
* bo locked. dev->struct_mutex locked.
*/
static void drm_bo_add_to_lru(drm_buffer_object_t * buf,
drm_buffer_manager_t * bm)
{
struct list_head *list;
unsigned mem_type;
if (buf->flags & DRM_BO_FLAG_MEM_TT) {
mem_type = DRM_BO_MEM_TT;
list =
(buf->
flags & (DRM_BO_FLAG_NO_EVICT | DRM_BO_FLAG_NO_MOVE)) ?
&bm->pinned[mem_type] : &bm->lru[mem_type];
list_add_tail(&buf->lru_ttm, list);
} else {
mem_type = DRM_BO_MEM_LOCAL;
list =
(buf->
flags & (DRM_BO_FLAG_NO_EVICT | DRM_BO_FLAG_NO_MOVE)) ?
&bm->pinned[mem_type] : &bm->lru[mem_type];
list_add_tail(&buf->lru_ttm, list);
}
if (buf->flags & DRM_BO_FLAG_MEM_VRAM) {
mem_type = DRM_BO_MEM_VRAM;
list =
(buf->
flags & (DRM_BO_FLAG_NO_EVICT | DRM_BO_FLAG_NO_MOVE)) ?
&bm->pinned[mem_type] : &bm->lru[mem_type];
list_add_tail(&buf->lru_card, list);
}
}
/*
* bo locked.
*/
static int drm_move_tt_to_local(drm_buffer_object_t * buf, int evict,
int force_no_move)
{
drm_device_t *dev = buf->dev;
int ret;
if (buf->node_ttm) {
mutex_lock(&dev->struct_mutex);
if (evict)
ret = drm_evict_ttm(buf->ttm);
else
ret = drm_unbind_ttm(buf->ttm);
if (ret) {
mutex_unlock(&dev->struct_mutex);
if (ret == -EAGAIN)
schedule();
return ret;
}
if (!(buf->flags & DRM_BO_FLAG_NO_MOVE) || force_no_move) {
drm_mm_put_block(buf->node_ttm);
buf->node_ttm = NULL;
}
mutex_unlock(&dev->struct_mutex);
}
buf->flags &= ~DRM_BO_FLAG_MEM_TT;
buf->flags |= DRM_BO_FLAG_MEM_LOCAL | DRM_BO_FLAG_CACHED;
return 0;
}
/*
* Lock dev->struct_mutex
*/
static void drm_bo_destroy_locked(drm_device_t * dev, drm_buffer_object_t * bo)
{
drm_buffer_manager_t *bm = &dev->bm;
DRM_FLAG_MASKED(bo->priv_flags, 0, _DRM_BO_FLAG_UNFENCED);
/*
* Somone might try to access us through the still active BM lists.
*/
if (atomic_read(&bo->usage) != 0)
return;
if (!list_empty(&bo->ddestroy))
return;
if (bo->fence) {
if (!drm_fence_object_signaled(bo->fence, bo->fence_type)) {
drm_fence_object_flush(dev, bo->fence, bo->fence_type);
list_add_tail(&bo->ddestroy, &bm->ddestroy);
schedule_delayed_work(&bm->wq,
((DRM_HZ / 100) <
1) ? 1 : DRM_HZ / 100);
return;
} else {
drm_fence_usage_deref_locked(dev, bo->fence);
bo->fence = NULL;
}
}
/*
* Take away from lru lists.
*/
list_del_init(&bo->lru_ttm);
list_del_init(&bo->lru_card);
if (bo->ttm) {
unsigned long _end = jiffies + DRM_HZ;
int ret;
/*
* This temporarily unlocks struct_mutex.
*/
do {
ret = drm_unbind_ttm(bo->ttm);
if (ret == -EAGAIN) {
mutex_unlock(&dev->struct_mutex);
schedule();
mutex_lock(&dev->struct_mutex);
}
} while (ret == -EAGAIN && !time_after_eq(jiffies, _end));
if (ret) {
DRM_ERROR("Couldn't unbind buffer. "
"Bad. Continuing anyway\n");
}
}
if (bo->node_ttm) {
drm_mm_put_block(bo->node_ttm);
bo->node_ttm = NULL;
}
if (bo->node_card) {
drm_mm_put_block(bo->node_card);
bo->node_card = NULL;
}
if (bo->ttm_object) {
drm_ttm_object_deref_locked(dev, bo->ttm_object);
}
atomic_dec(&bm->count);
drm_ctl_free(bo, sizeof(*bo), DRM_MEM_BUFOBJ);
}
static void drm_bo_delayed_delete(drm_device_t * dev)
{
drm_buffer_manager_t *bm = &dev->bm;
drm_buffer_object_t *entry, *nentry;
struct list_head *list, *next;
drm_fence_object_t *fence;
mutex_lock(&dev->struct_mutex);
if (!bm->initialized)
goto out;
list = bm->ddestroy.next;
list_for_each_safe(list, next, &bm->ddestroy) {
entry = list_entry(list, drm_buffer_object_t, ddestroy);
nentry = NULL;
/*
* Another process may claim access to this entry through the
* lru lists. In that case, just skip it.
*/
if (atomic_read(&entry->usage) != 0)
continue;
/*
* Since we're the only users, No need to take the
* bo->mutex to watch the fence.
*/
fence = entry->fence;
if (fence && drm_fence_object_signaled(fence,
entry->fence_type)) {
drm_fence_usage_deref_locked(dev, fence);
entry->fence = NULL;
}
if (!entry->fence) {
/*
* Protect the "next" entry against destruction in case
* drm_bo_destroy_locked temporarily releases the
* struct_mutex;
*/
nentry = NULL;
if (next != &bm->ddestroy) {
nentry = list_entry(next, drm_buffer_object_t,
ddestroy);
atomic_inc(&nentry->usage);
}
DRM_DEBUG("Destroying delayed buffer object\n");
list_del_init(&entry->ddestroy);
drm_bo_destroy_locked(dev, entry);
if (next != &bm->ddestroy)
atomic_dec(&nentry->usage);
}
}
out:
mutex_unlock(&dev->struct_mutex);
}
static void drm_bo_delayed_workqueue(void *data)
{
drm_device_t *dev = (drm_device_t *) data;
drm_buffer_manager_t *bm = &dev->bm;
DRM_DEBUG("Delayed delete Worker\n");
drm_bo_delayed_delete(dev);
mutex_lock(&dev->struct_mutex);
if (bm->initialized && !list_empty(&bm->ddestroy)) {
schedule_delayed_work(&bm->wq,
((DRM_HZ / 100) < 1) ? 1 : DRM_HZ / 100);
}
mutex_unlock(&dev->struct_mutex);
}
void drm_bo_usage_deref_locked(drm_device_t * dev, drm_buffer_object_t * bo)
{
if (atomic_dec_and_test(&bo->usage)) {
drm_bo_destroy_locked(dev, bo);
}
}
static void drm_bo_base_deref_locked(drm_file_t * priv, drm_user_object_t * uo)
{
drm_bo_usage_deref_locked(priv->head->dev,
drm_user_object_entry(uo, drm_buffer_object_t,
base));
}
void drm_bo_usage_deref_unlocked(drm_device_t * dev, drm_buffer_object_t * bo)
{
if (atomic_dec_and_test(&bo->usage)) {
mutex_lock(&dev->struct_mutex);
if (atomic_read(&bo->usage) == 0)
drm_bo_destroy_locked(dev, bo);
mutex_unlock(&dev->struct_mutex);
}
}
/*
* Note. The caller has to register (if applicable)
* and deregister fence object usage.
*/
int drm_fence_buffer_objects(drm_file_t * priv,
struct list_head *list,
uint32_t fence_flags,
drm_fence_object_t * fence,
drm_fence_object_t ** used_fence)
{
drm_device_t *dev = priv->head->dev;
drm_buffer_manager_t *bm = &dev->bm;
drm_buffer_object_t *entry;
uint32_t fence_type = 0;
int count = 0;
int ret = 0;
struct list_head f_list, *l;
mutex_lock(&dev->struct_mutex);
if (!list)
list = &bm->unfenced;
list_for_each_entry(entry, list, lru_ttm) {
BUG_ON(!(entry->priv_flags & _DRM_BO_FLAG_UNFENCED));
fence_type |= entry->fence_type;
if (entry->fence_class != 0) {
DRM_ERROR("Fence class %d is not implemented yet.\n",
entry->fence_class);
ret = -EINVAL;
goto out;
}
count++;
}
if (!count) {
ret = -EINVAL;
goto out;
}
/*
* Transfer to a local list before we release the dev->struct_mutex;
* This is so we don't get any new unfenced objects while fencing
* the ones we already have..
*/
list_add_tail(&f_list, list);
list_del_init(list);
if (fence) {
if ((fence_type & fence->type) != fence_type) {
DRM_ERROR("Given fence doesn't match buffers "
"on unfenced list.\n");
ret = -EINVAL;
goto out;
}
} else {
mutex_unlock(&dev->struct_mutex);
ret = drm_fence_object_create(dev, fence_type,
fence_flags | DRM_FENCE_FLAG_EMIT,
&fence);
mutex_lock(&dev->struct_mutex);
if (ret)
goto out;
}
count = 0;
l = f_list.next;
while (l != &f_list) {
entry = list_entry(l, drm_buffer_object_t, lru_ttm);
atomic_inc(&entry->usage);
mutex_unlock(&dev->struct_mutex);
mutex_lock(&entry->mutex);
mutex_lock(&dev->struct_mutex);
list_del_init(l);
list_del_init(&entry->lru_card);
if (entry->priv_flags & _DRM_BO_FLAG_UNFENCED) {
count++;
if (entry->fence)
drm_fence_usage_deref_locked(dev, entry->fence);
entry->fence = fence;
DRM_FLAG_MASKED(entry->priv_flags, 0,
_DRM_BO_FLAG_UNFENCED);
DRM_WAKEUP(&entry->event_queue);
drm_bo_add_to_lru(entry, bm);
}
mutex_unlock(&entry->mutex);
drm_bo_usage_deref_locked(dev, entry);
l = f_list.next;
}
atomic_add(count, &fence->usage);
DRM_DEBUG("Fenced %d buffers\n", count);
out:
mutex_unlock(&dev->struct_mutex);
*used_fence = fence;
return ret;
}
EXPORT_SYMBOL(drm_fence_buffer_objects);
/*
* Call bo->mutex locked.
* Wait until the buffer is idle.
*/
static int drm_bo_wait(drm_buffer_object_t * bo, int lazy, int ignore_signals,
int no_wait)
{
drm_fence_object_t *fence = bo->fence;
int ret;
if (fence) {
drm_device_t *dev = bo->dev;
if (drm_fence_object_signaled(fence, bo->fence_type)) {
drm_fence_usage_deref_unlocked(dev, fence);
bo->fence = NULL;
return 0;
}
if (no_wait) {
return -EBUSY;
}
ret =
drm_fence_object_wait(dev, fence, lazy, ignore_signals,
bo->fence_type);
if (ret)
return ret;
drm_fence_usage_deref_unlocked(dev, fence);
bo->fence = NULL;
}
return 0;
}
/*
* bo->mutex locked
*/
static int drm_bo_evict(drm_buffer_object_t * bo, unsigned mem_type,
int no_wait, int force_no_move)
{
int ret = 0;
drm_device_t *dev = bo->dev;
drm_buffer_manager_t *bm = &dev->bm;
/*
* Someone might have modified the buffer before we took the buffer mutex.
*/
if (bo->priv_flags & _DRM_BO_FLAG_UNFENCED)
goto out;
if (!(bo->flags & drm_bo_type_flags(mem_type)))
goto out;
ret = drm_bo_wait(bo, 0, 0, no_wait);
if (ret) {
if (ret != -EAGAIN)
DRM_ERROR("Failed to expire fence before "
"buffer eviction.\n");
goto out;
}
if (mem_type == DRM_BO_MEM_TT) {
ret = drm_move_tt_to_local(bo, 1, force_no_move);
if (ret)
goto out;
mutex_lock(&dev->struct_mutex);
list_del_init(&bo->lru_ttm);
drm_bo_add_to_lru(bo, bm);
mutex_unlock(&dev->struct_mutex);
}
#if 0
else {
ret = drm_move_vram_to_local(bo);
mutex_lock(&dev->struct_mutex);
list_del_init(&bo->lru_card);
mutex_unlock(&dev->struct_mutex);
}
#endif
if (ret)
goto out;
DRM_FLAG_MASKED(bo->priv_flags, _DRM_BO_FLAG_EVICTED,
_DRM_BO_FLAG_EVICTED);
out:
return ret;
}
/*
* buf->mutex locked.
*/
int drm_bo_alloc_space(drm_buffer_object_t * buf, unsigned mem_type,
int no_wait)
{
drm_device_t *dev = buf->dev;
drm_mm_node_t *node;
drm_buffer_manager_t *bm = &dev->bm;
drm_buffer_object_t *bo;
drm_mm_t *mm = &bm->manager[mem_type];
struct list_head *lru;
unsigned long size = buf->num_pages;
int ret;
mutex_lock(&dev->struct_mutex);
do {
node = drm_mm_search_free(mm, size, 0, 1);
if (node)
break;
lru = &bm->lru[mem_type];
if (lru->next == lru)
break;
bo = drm_bo_entry(lru->next, mem_type);
atomic_inc(&bo->usage);
mutex_unlock(&dev->struct_mutex);
mutex_lock(&bo->mutex);
BUG_ON(bo->flags & DRM_BO_FLAG_NO_MOVE);
ret = drm_bo_evict(bo, mem_type, no_wait, 0);
mutex_unlock(&bo->mutex);
drm_bo_usage_deref_unlocked(dev, bo);
if (ret)
return ret;
mutex_lock(&dev->struct_mutex);
} while (1);
if (!node) {
DRM_ERROR("Out of videoram / aperture space\n");
mutex_unlock(&dev->struct_mutex);
return -ENOMEM;
}
node = drm_mm_get_block(node, size, 0);
mutex_unlock(&dev->struct_mutex);
BUG_ON(!node);
node->private = (void *)buf;
if (mem_type == DRM_BO_MEM_TT) {
buf->node_ttm = node;
} else {
buf->node_card = node;
}
buf->offset = node->start * PAGE_SIZE;
return 0;
}
static int drm_move_local_to_tt(drm_buffer_object_t * bo, int no_wait)
{
drm_device_t *dev = bo->dev;
drm_ttm_backend_t *be;
int ret;
if (!(bo->node_ttm && (bo->flags & DRM_BO_FLAG_NO_MOVE))) {
BUG_ON(bo->node_ttm);
ret = drm_bo_alloc_space(bo, DRM_BO_MEM_TT, no_wait);
if (ret)
return ret;
}
DRM_DEBUG("Flipping in to AGP 0x%08lx\n", bo->node_ttm->start);
mutex_lock(&dev->struct_mutex);
ret = drm_bind_ttm(bo->ttm, bo->flags & DRM_BO_FLAG_BIND_CACHED,
bo->node_ttm->start);
if (ret) {
drm_mm_put_block(bo->node_ttm);
bo->node_ttm = NULL;
}
mutex_unlock(&dev->struct_mutex);
if (ret) {
return ret;
}
be = bo->ttm->be;
if (be->needs_ub_cache_adjust(be))
bo->flags &= ~DRM_BO_FLAG_CACHED;
bo->flags &= ~DRM_BO_MASK_MEM;
bo->flags |= DRM_BO_FLAG_MEM_TT;
if (bo->priv_flags & _DRM_BO_FLAG_EVICTED) {
ret = dev->driver->bo_driver->invalidate_caches(dev, bo->flags);
if (ret)
DRM_ERROR("Could not flush read caches\n");
}
DRM_FLAG_MASKED(bo->priv_flags, 0, _DRM_BO_FLAG_EVICTED);
return 0;
}
static int drm_bo_new_flags(drm_device_t * dev,
uint32_t flags, uint32_t new_mask, uint32_t hint,
int init, uint32_t * n_flags, uint32_t * n_mask)
{
uint32_t new_flags = 0;
uint32_t new_props;
drm_bo_driver_t *driver = dev->driver->bo_driver;
drm_buffer_manager_t *bm = &dev->bm;
unsigned i;
/*
* First adjust the mask to take away nonexistant memory types.
*/
for (i = 0; i < DRM_BO_MEM_TYPES; ++i) {
if (!bm->use_type[i])
new_mask &= ~drm_bo_type_flags(i);
}
if ((new_mask & DRM_BO_FLAG_NO_EVICT) && !DRM_SUSER(DRM_CURPROC)) {
DRM_ERROR
("DRM_BO_FLAG_NO_EVICT is only available to priviliged "
"processes\n");
return -EPERM;
}
if (new_mask & DRM_BO_FLAG_BIND_CACHED) {
if (((new_mask & DRM_BO_FLAG_MEM_TT) &&
!driver->cached[DRM_BO_MEM_TT]) &&
((new_mask & DRM_BO_FLAG_MEM_VRAM)
&& !driver->cached[DRM_BO_MEM_VRAM])) {
new_mask &= ~DRM_BO_FLAG_BIND_CACHED;
} else {
if (!driver->cached[DRM_BO_MEM_TT])
new_flags &= DRM_BO_FLAG_MEM_TT;
if (!driver->cached[DRM_BO_MEM_VRAM])
new_flags &= DRM_BO_FLAG_MEM_VRAM;
}
}
if ((new_mask & DRM_BO_FLAG_READ_CACHED) &&
!(new_mask & DRM_BO_FLAG_BIND_CACHED)) {
if ((new_mask & DRM_BO_FLAG_NO_EVICT) &&
!(new_mask & DRM_BO_FLAG_MEM_LOCAL)) {
DRM_ERROR
("Cannot read cached from a pinned VRAM / TT buffer\n");
return -EINVAL;
}
}
/*
* Determine new memory location:
*/
if (!(flags & new_mask & DRM_BO_MASK_MEM) || init) {
new_flags = new_mask & DRM_BO_MASK_MEM;
if (!new_flags) {
DRM_ERROR("Invalid buffer object memory flags\n");
return -EINVAL;
}
if (new_flags & DRM_BO_FLAG_MEM_LOCAL) {
if ((hint & DRM_BO_HINT_AVOID_LOCAL) &&
new_flags & (DRM_BO_FLAG_MEM_VRAM |
DRM_BO_FLAG_MEM_TT)) {
new_flags &= ~DRM_BO_FLAG_MEM_LOCAL;
} else {
new_flags = DRM_BO_FLAG_MEM_LOCAL;
}
}
if (new_flags & DRM_BO_FLAG_MEM_TT) {
if ((new_mask & DRM_BO_FLAG_PREFER_VRAM) &&
new_flags & DRM_BO_FLAG_MEM_VRAM) {
new_flags = DRM_BO_FLAG_MEM_VRAM;
} else {
new_flags = DRM_BO_FLAG_MEM_TT;
}
}
} else {
new_flags = flags & DRM_BO_MASK_MEM;
}
new_props = new_mask & (DRM_BO_FLAG_EXE | DRM_BO_FLAG_WRITE |
DRM_BO_FLAG_READ);
if (!new_props) {
DRM_ERROR("Invalid buffer object rwx properties\n");
return -EINVAL;
}
new_flags |= new_mask & ~DRM_BO_MASK_MEM;
if (((flags ^ new_flags) & DRM_BO_FLAG_BIND_CACHED) &&
(new_flags & DRM_BO_FLAG_NO_EVICT) &&
(flags & (DRM_BO_FLAG_MEM_TT | DRM_BO_FLAG_MEM_VRAM))) {
if (!(flags & DRM_BO_FLAG_CACHED)) {
DRM_ERROR
("Cannot change caching policy of pinned buffer\n");
return -EINVAL;
} else {
new_flags &= ~DRM_BO_FLAG_CACHED;
}
}
*n_flags = new_flags;
*n_mask = new_mask;
return 0;
}
/*
* Call dev->struct_mutex locked.
*/
drm_buffer_object_t *drm_lookup_buffer_object(drm_file_t * priv,
uint32_t handle, int check_owner)
{
drm_user_object_t *uo;
drm_buffer_object_t *bo;
uo = drm_lookup_user_object(priv, handle);
if (!uo || (uo->type != drm_buffer_type)) {
DRM_ERROR("Could not find buffer object 0x%08x\n", handle);
return NULL;
}
if (check_owner && priv != uo->owner) {
if (!drm_lookup_ref_object(priv, uo, _DRM_REF_USE))
return NULL;
}
bo = drm_user_object_entry(uo, drm_buffer_object_t, base);
atomic_inc(&bo->usage);
return bo;
}
/*
* Call bo->mutex locked.
* Returns 1 if the buffer is currently rendered to or from. 0 otherwise.
* Doesn't do any fence flushing as opposed to the drm_bo_busy function.
*/
static int drm_bo_quick_busy(drm_buffer_object_t * bo)
{
drm_fence_object_t *fence = bo->fence;
BUG_ON(bo->priv_flags & _DRM_BO_FLAG_UNFENCED);
if (fence) {
drm_device_t *dev = bo->dev;
if (drm_fence_object_signaled(fence, bo->fence_type)) {
drm_fence_usage_deref_unlocked(dev, fence);
bo->fence = NULL;
return 0;
}
return 1;
}
return 0;
}
/*
* Call bo->mutex locked.
* Returns 1 if the buffer is currently rendered to or from. 0 otherwise.
*/
static int drm_bo_busy(drm_buffer_object_t * bo)
{
drm_fence_object_t *fence = bo->fence;
BUG_ON(bo->priv_flags & _DRM_BO_FLAG_UNFENCED);
if (fence) {
drm_device_t *dev = bo->dev;
if (drm_fence_object_signaled(fence, bo->fence_type)) {
drm_fence_usage_deref_unlocked(dev, fence);
bo->fence = NULL;
return 0;
}
drm_fence_object_flush(dev, fence, DRM_FENCE_TYPE_EXE);
if (drm_fence_object_signaled(fence, bo->fence_type)) {
drm_fence_usage_deref_unlocked(dev, fence);
bo->fence = NULL;
return 0;
}
return 1;
}
return 0;
}
static int drm_bo_read_cached(drm_buffer_object_t * bo)
{
int ret = 0;
BUG_ON(bo->priv_flags & _DRM_BO_FLAG_UNFENCED);
if (bo->node_card)
ret = drm_bo_evict(bo, DRM_BO_MEM_VRAM, 1, 0);
if (ret)
return ret;
if (bo->node_ttm)
ret = drm_bo_evict(bo, DRM_BO_MEM_TT, 1, 0);
return ret;
}
/*
* Wait until a buffer is unmapped.
*/
static int drm_bo_wait_unmapped(drm_buffer_object_t * bo, int no_wait)
{
int ret = 0;
if ((atomic_read(&bo->mapped) >= 0) && no_wait)
return -EBUSY;
DRM_WAIT_ON(ret, bo->event_queue, 3 * DRM_HZ,
atomic_read(&bo->mapped) == -1);
if (ret == -EINTR)
ret = -EAGAIN;
return ret;
}
static int drm_bo_check_unfenced(drm_buffer_object_t * bo)
{
int ret;
mutex_lock(&bo->mutex);
ret = (bo->priv_flags & _DRM_BO_FLAG_UNFENCED);
mutex_unlock(&bo->mutex);
return ret;
}
/*
* Wait until a buffer, scheduled to be fenced moves off the unfenced list.
* Until then, we cannot really do anything with it except delete it.
* The unfenced list is a PITA, and the operations
* 1) validating
* 2) submitting commands
* 3) fencing
* Should really be an atomic operation.
* We now "solve" this problem by keeping
* the buffer "unfenced" after validating, but before fencing.
*/
static int drm_bo_wait_unfenced(drm_buffer_object_t * bo, int no_wait,
int eagain_if_wait)
{
int ret = (bo->priv_flags & _DRM_BO_FLAG_UNFENCED);
unsigned long _end = jiffies + 3 * DRM_HZ;
if (ret && no_wait)
return -EBUSY;
else if (!ret)
return 0;
do {
mutex_unlock(&bo->mutex);
DRM_WAIT_ON(ret, bo->event_queue, 3 * DRM_HZ,
!drm_bo_check_unfenced(bo));
mutex_lock(&bo->mutex);
if (ret == -EINTR)
return -EAGAIN;
if (ret) {
DRM_ERROR
("Error waiting for buffer to become fenced\n");
return ret;
}
ret = (bo->priv_flags & _DRM_BO_FLAG_UNFENCED);
} while (ret && !time_after_eq(jiffies, _end));
if (ret) {
DRM_ERROR("Timeout waiting for buffer to become fenced\n");
return ret;
}
if (eagain_if_wait)
return -EAGAIN;
return 0;
}
/*
* Fill in the ioctl reply argument with buffer info.
* Bo locked.
*/
static void drm_bo_fill_rep_arg(drm_buffer_object_t * bo,
drm_bo_arg_reply_t * rep)
{
rep->handle = bo->base.hash.key;
rep->flags = bo->flags;
rep->size = bo->num_pages * PAGE_SIZE;
rep->offset = bo->offset;
if (bo->ttm_object) {
rep->arg_handle = bo->ttm_object->map_list.user_token;
} else {
rep->arg_handle = 0;
}
rep->mask = bo->mask;
rep->buffer_start = bo->buffer_start;
rep->fence_flags = bo->fence_type;
rep->rep_flags = 0;
if ((bo->priv_flags & _DRM_BO_FLAG_UNFENCED) || drm_bo_quick_busy(bo)) {
DRM_FLAG_MASKED(rep->rep_flags, DRM_BO_REP_BUSY,
DRM_BO_REP_BUSY);
}
}
/*
* Wait for buffer idle and register that we've mapped the buffer.
* Mapping is registered as a drm_ref_object with type _DRM_REF_TYPE1,
* so that if the client dies, the mapping is automatically
* unregistered.
*/
static int drm_buffer_object_map(drm_file_t * priv, uint32_t handle,
uint32_t map_flags, unsigned hint,
drm_bo_arg_reply_t * rep)
{
drm_buffer_object_t *bo;
drm_device_t *dev = priv->head->dev;
int ret = 0;
int no_wait = hint & DRM_BO_HINT_DONT_BLOCK;
mutex_lock(&dev->struct_mutex);
bo = drm_lookup_buffer_object(priv, handle, 1);
mutex_unlock(&dev->struct_mutex);
if (!bo)
return -EINVAL;
mutex_lock(&bo->mutex);
if (!(hint & DRM_BO_HINT_ALLOW_UNFENCED_MAP)) {
ret = drm_bo_wait_unfenced(bo, no_wait, 0);
if (ret)
goto out;
}
/*
* If this returns true, we are currently unmapped.
* We need to do this test, because unmapping can
* be done without the bo->mutex held.
*/
while (1) {
if (atomic_inc_and_test(&bo->mapped)) {
if (no_wait && drm_bo_busy(bo)) {
atomic_dec(&bo->mapped);
ret = -EBUSY;
goto out;
}
ret = drm_bo_wait(bo, 0, 0, no_wait);
if (ret) {
atomic_dec(&bo->mapped);
goto out;
}
if ((map_flags & DRM_BO_FLAG_READ) &&
(bo->flags & DRM_BO_FLAG_READ_CACHED) &&
(!(bo->flags & DRM_BO_FLAG_CACHED))) {
drm_bo_read_cached(bo);
}
break;
} else if ((map_flags & DRM_BO_FLAG_READ) &&
(bo->flags & DRM_BO_FLAG_READ_CACHED) &&
(!(bo->flags & DRM_BO_FLAG_CACHED))) {
/*
* We are already mapped with different flags.
* need to wait for unmap.
*/
ret = drm_bo_wait_unmapped(bo, no_wait);
if (ret)
goto out;
continue;
}
break;
}
mutex_lock(&dev->struct_mutex);
ret = drm_add_ref_object(priv, &bo->base, _DRM_REF_TYPE1);
mutex_unlock(&dev->struct_mutex);
if (ret) {
if (atomic_add_negative(-1, &bo->mapped))
DRM_WAKEUP(&bo->event_queue);
} else
drm_bo_fill_rep_arg(bo, rep);
out:
mutex_unlock(&bo->mutex);
drm_bo_usage_deref_unlocked(dev, bo);
return ret;
}
static int drm_buffer_object_unmap(drm_file_t * priv, uint32_t handle)
{
drm_device_t *dev = priv->head->dev;
drm_buffer_object_t *bo;
drm_ref_object_t *ro;
int ret = 0;
mutex_lock(&dev->struct_mutex);
bo = drm_lookup_buffer_object(priv, handle, 1);
if (!bo) {
ret = -EINVAL;
goto out;
}
ro = drm_lookup_ref_object(priv, &bo->base, _DRM_REF_TYPE1);
if (!ro) {
ret = -EINVAL;
goto out;
}
drm_remove_ref_object(priv, ro);
drm_bo_usage_deref_locked(dev, bo);
out:
mutex_unlock(&dev->struct_mutex);
return ret;
}
/*
* Call struct-sem locked.
*/
static void drm_buffer_user_object_unmap(drm_file_t * priv,
drm_user_object_t * uo,
drm_ref_t action)
{
drm_buffer_object_t *bo =
drm_user_object_entry(uo, drm_buffer_object_t, base);
/*
* We DON'T want to take the bo->lock here, because we want to
* hold it when we wait for unmapped buffer.
*/
BUG_ON(action != _DRM_REF_TYPE1);
if (atomic_add_negative(-1, &bo->mapped))
DRM_WAKEUP(&bo->event_queue);
}
/*
* bo->mutex locked.
*/
static int drm_bo_move_buffer(drm_buffer_object_t * bo, uint32_t new_flags,
int no_wait, int force_no_move)
{
int ret = 0;
/*
* Flush outstanding fences.
*/
drm_bo_busy(bo);
/*
* Make sure we're not mapped.
*/
ret = drm_bo_wait_unmapped(bo, no_wait);
if (ret)
return ret;
/*
* Wait for outstanding fences.
*/
ret = drm_bo_wait(bo, 0, 0, no_wait);
if (ret == -EINTR)
return -EAGAIN;
if (ret)
return ret;
if (new_flags & DRM_BO_FLAG_MEM_TT) {
ret = drm_move_local_to_tt(bo, no_wait);
if (ret)
return ret;
} else {
drm_move_tt_to_local(bo, 0, force_no_move);
}
return 0;
}
/*
* bo locked.
*/
static int drm_buffer_object_validate(drm_buffer_object_t * bo,
uint32_t new_flags,
int move_unfenced, int no_wait)
{
drm_device_t *dev = bo->dev;
drm_buffer_manager_t *bm = &dev->bm;
uint32_t flag_diff = (new_flags ^ bo->flags);
drm_bo_driver_t *driver = dev->driver->bo_driver;
int ret;
if (new_flags & DRM_BO_FLAG_MEM_VRAM) {
DRM_ERROR("Vram support not implemented yet\n");
return -EINVAL;
}
DRM_DEBUG("New flags 0x%08x, Old flags 0x%08x\n", new_flags, bo->flags);
ret = driver->fence_type(new_flags, &bo->fence_class, &bo->fence_type);
if (ret) {
DRM_ERROR("Driver did not support given buffer permissions\n");
return ret;
}
/*
* Move out if we need to change caching policy.
*/
if ((flag_diff & DRM_BO_FLAG_BIND_CACHED) &&
!(bo->flags & DRM_BO_FLAG_MEM_LOCAL)) {
if (bo->flags & (DRM_BO_FLAG_NO_EVICT | DRM_BO_FLAG_NO_MOVE)) {
DRM_ERROR("Cannot change caching policy of "
"pinned buffer.\n");
return -EINVAL;
}
ret = drm_bo_move_buffer(bo, DRM_BO_FLAG_MEM_LOCAL, no_wait, 0);
if (ret) {
if (ret != -EAGAIN)
DRM_ERROR("Failed moving buffer.\n");
return ret;
}
}
DRM_MASK_VAL(bo->flags, DRM_BO_FLAG_BIND_CACHED, new_flags);
flag_diff = (new_flags ^ bo->flags);
/*
* Check whether we dropped no_move policy, and in that case,
* release reserved manager regions.
*/
if ((flag_diff & DRM_BO_FLAG_NO_MOVE) &&
!(new_flags & DRM_BO_FLAG_NO_MOVE)) {
mutex_lock(&dev->struct_mutex);
if (bo->node_ttm) {
drm_mm_put_block(bo->node_ttm);
bo->node_ttm = NULL;
}
if (bo->node_card) {
drm_mm_put_block(bo->node_card);
bo->node_card = NULL;
}
mutex_unlock(&dev->struct_mutex);
}
/*
* Check whether we need to move buffer.
*/
if ((bo->type != drm_bo_type_fake) && (flag_diff & DRM_BO_MASK_MEM)) {
ret = drm_bo_move_buffer(bo, new_flags, no_wait, 1);
if (ret) {
if (ret != -EAGAIN)
DRM_ERROR("Failed moving buffer.\n");
return ret;
}
}
if (move_unfenced) {
/*
* Place on unfenced list.
*/
DRM_FLAG_MASKED(bo->priv_flags, _DRM_BO_FLAG_UNFENCED,
_DRM_BO_FLAG_UNFENCED);
mutex_lock(&dev->struct_mutex);
list_del(&bo->lru_ttm);
list_add_tail(&bo->lru_ttm, &bm->unfenced);
list_del_init(&bo->lru_card);
mutex_unlock(&dev->struct_mutex);
} else {
mutex_lock(&dev->struct_mutex);
list_del_init(&bo->lru_ttm);
list_del_init(&bo->lru_card);
drm_bo_add_to_lru(bo, bm);
mutex_unlock(&dev->struct_mutex);
}
bo->flags = new_flags;
return 0;
}
static int drm_bo_handle_validate(drm_file_t * priv, uint32_t handle,
uint32_t flags, uint32_t mask, uint32_t hint,
drm_bo_arg_reply_t * rep)
{
drm_buffer_object_t *bo;
drm_device_t *dev = priv->head->dev;
int ret;
int no_wait = hint & DRM_BO_HINT_DONT_BLOCK;
uint32_t new_flags;
bo = drm_lookup_buffer_object(priv, handle, 1);
if (!bo) {
return -EINVAL;
}
mutex_lock(&bo->mutex);
ret = drm_bo_wait_unfenced(bo, no_wait, 0);
if (ret)
goto out;
ret = drm_bo_new_flags(dev, bo->flags,
(flags & mask) | (bo->mask & ~mask), hint,
0, &new_flags, &bo->mask);
if (ret)
goto out;
ret =
drm_buffer_object_validate(bo, new_flags,
!(hint & DRM_BO_HINT_DONT_FENCE),
no_wait);
drm_bo_fill_rep_arg(bo, rep);
out:
mutex_unlock(&bo->mutex);
drm_bo_usage_deref_unlocked(dev, bo);
return ret;
}
static int drm_bo_handle_info(drm_file_t * priv, uint32_t handle,
drm_bo_arg_reply_t * rep)
{
drm_buffer_object_t *bo;
bo = drm_lookup_buffer_object(priv, handle, 1);
if (!bo) {
return -EINVAL;
}
mutex_lock(&bo->mutex);
if (!(bo->priv_flags & _DRM_BO_FLAG_UNFENCED))
(void)drm_bo_busy(bo);
drm_bo_fill_rep_arg(bo, rep);
mutex_unlock(&bo->mutex);
drm_bo_usage_deref_unlocked(bo->dev, bo);
return 0;
}
static int drm_bo_handle_wait(drm_file_t * priv, uint32_t handle,
uint32_t hint, drm_bo_arg_reply_t * rep)
{
drm_buffer_object_t *bo;
int no_wait = hint & DRM_BO_HINT_DONT_BLOCK;
int ret;
bo = drm_lookup_buffer_object(priv, handle, 1);
if (!bo) {
return -EINVAL;
}
mutex_lock(&bo->mutex);
ret = drm_bo_wait_unfenced(bo, no_wait, 0);
if (ret)
goto out;
ret = drm_bo_wait(bo, hint & DRM_BO_HINT_WAIT_LAZY, 0, no_wait);
if (ret)
goto out;
drm_bo_fill_rep_arg(bo, rep);
out:
mutex_unlock(&bo->mutex);
drm_bo_usage_deref_unlocked(bo->dev, bo);
return ret;
}
/*
* Call bo->mutex locked.
*/
static int drm_bo_add_ttm(drm_file_t * priv, drm_buffer_object_t * bo)
{
drm_device_t *dev = bo->dev;
drm_ttm_object_t *to = NULL;
int ret = 0;
uint32_t ttm_flags = 0;
bo->ttm_object = NULL;
bo->ttm = NULL;
switch (bo->type) {
case drm_bo_type_dc:
mutex_lock(&dev->struct_mutex);
ret = drm_ttm_object_create(dev, bo->num_pages * PAGE_SIZE,
ttm_flags, &to);
mutex_unlock(&dev->struct_mutex);
break;
case drm_bo_type_user:
case drm_bo_type_fake:
break;
default:
DRM_ERROR("Illegal buffer object type\n");
ret = -EINVAL;
break;
}
if (ret) {
return ret;
}
if (to) {
bo->ttm_object = to;
bo->ttm = drm_ttm_from_object(to);
}
return ret;
}
int drm_buffer_object_create(drm_file_t * priv,
unsigned long size,
drm_bo_type_t type,
uint32_t mask,
uint32_t hint,
unsigned long buffer_start,
drm_buffer_object_t ** buf_obj)
{
drm_device_t *dev = priv->head->dev;
drm_buffer_manager_t *bm = &dev->bm;
drm_buffer_object_t *bo;
int ret = 0;
uint32_t new_flags;
unsigned long num_pages;
drm_bo_delayed_delete(dev);
if ((buffer_start & ~PAGE_MASK) && (type != drm_bo_type_fake)) {
DRM_ERROR("Invalid buffer object start.\n");
return -EINVAL;
}
num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
if (num_pages == 0) {
DRM_ERROR("Illegal buffer object size.\n");
return -EINVAL;
}
bo = drm_ctl_calloc(1, sizeof(*bo), DRM_MEM_BUFOBJ);
if (!bo)
return -ENOMEM;
mutex_init(&bo->mutex);
mutex_lock(&bo->mutex);
atomic_set(&bo->usage, 1);
atomic_set(&bo->mapped, -1);
DRM_INIT_WAITQUEUE(&bo->event_queue);
INIT_LIST_HEAD(&bo->lru_ttm);
INIT_LIST_HEAD(&bo->lru_card);
INIT_LIST_HEAD(&bo->ddestroy);
bo->dev = dev;
bo->type = type;
bo->num_pages = num_pages;
bo->node_card = NULL;
bo->node_ttm = NULL;
if (bo->type == drm_bo_type_fake) {
bo->offset = buffer_start;
bo->buffer_start = 0;
} else {
bo->buffer_start = buffer_start;
}
bo->priv_flags = 0;
bo->flags = DRM_BO_FLAG_MEM_LOCAL | DRM_BO_FLAG_CACHED;
atomic_inc(&bm->count);
ret = drm_bo_new_flags(dev, bo->flags, mask, hint,
1, &new_flags, &bo->mask);
if (ret)
goto out_err;
ret = drm_bo_add_ttm(priv, bo);
if (ret)
goto out_err;
ret = drm_buffer_object_validate(bo, new_flags, 0,
hint & DRM_BO_HINT_DONT_BLOCK);
if (ret)
goto out_err;
mutex_unlock(&bo->mutex);
*buf_obj = bo;
return 0;
out_err:
mutex_unlock(&bo->mutex);
drm_bo_usage_deref_unlocked(dev, bo);
return ret;
}
static int drm_bo_add_user_object(drm_file_t * priv, drm_buffer_object_t * bo,
int shareable)
{
drm_device_t *dev = priv->head->dev;
int ret;
mutex_lock(&dev->struct_mutex);
ret = drm_add_user_object(priv, &bo->base, shareable);
if (ret)
goto out;
bo->base.remove = drm_bo_base_deref_locked;
bo->base.type = drm_buffer_type;
bo->base.ref_struct_locked = NULL;
bo->base.unref = drm_buffer_user_object_unmap;
out:
mutex_unlock(&dev->struct_mutex);
return ret;
}
static int drm_bo_lock_test(drm_device_t * dev, struct file *filp)
{
LOCK_TEST_WITH_RETURN(dev, filp);
return 0;
}
int drm_bo_ioctl(DRM_IOCTL_ARGS)
{
DRM_DEVICE;
drm_bo_arg_t arg;
drm_bo_arg_request_t *req = &arg.d.req;
drm_bo_arg_reply_t rep;
unsigned long next;
drm_user_object_t *uo;
drm_buffer_object_t *entry;
if (!dev->bm.initialized) {
DRM_ERROR("Buffer object manager is not initialized.\n");
return -EINVAL;
}
do {
DRM_COPY_FROM_USER_IOCTL(arg, (void __user *)data, sizeof(arg));
if (arg.handled) {
data = arg.next;
continue;
}
rep.ret = 0;
switch (req->op) {
case drm_bo_create:
rep.ret =
drm_buffer_object_create(priv, req->size,
req->type,
req->mask,
req->hint,
req->buffer_start, &entry);
if (rep.ret)
break;
rep.ret =
drm_bo_add_user_object(priv, entry,
req->
mask &
DRM_BO_FLAG_SHAREABLE);
if (rep.ret)
drm_bo_usage_deref_unlocked(dev, entry);
if (rep.ret)
break;
mutex_lock(&entry->mutex);
drm_bo_fill_rep_arg(entry, &rep);
mutex_unlock(&entry->mutex);
break;
case drm_bo_unmap:
rep.ret = drm_buffer_object_unmap(priv, req->handle);
break;
case drm_bo_map:
rep.ret = drm_buffer_object_map(priv, req->handle,
req->mask,
req->hint, &rep);
break;
case drm_bo_destroy:
mutex_lock(&dev->struct_mutex);
uo = drm_lookup_user_object(priv, req->handle);
if (!uo || (uo->type != drm_buffer_type)
|| uo->owner != priv) {
mutex_unlock(&dev->struct_mutex);
rep.ret = -EINVAL;
break;
}
rep.ret = drm_remove_user_object(priv, uo);
mutex_unlock(&dev->struct_mutex);
break;
case drm_bo_reference:
rep.ret = drm_user_object_ref(priv, req->handle,
drm_buffer_type, &uo);
if (rep.ret)
break;
mutex_lock(&dev->struct_mutex);
uo = drm_lookup_user_object(priv, req->handle);
entry =
drm_user_object_entry(uo, drm_buffer_object_t,
base);
atomic_dec(&entry->usage);
mutex_unlock(&dev->struct_mutex);
mutex_lock(&entry->mutex);
drm_bo_fill_rep_arg(entry, &rep);
mutex_unlock(&entry->mutex);
break;
case drm_bo_unreference:
rep.ret = drm_user_object_unref(priv, req->handle,
drm_buffer_type);
break;
case drm_bo_validate:
rep.ret = drm_bo_lock_test(dev, filp);
if (rep.ret)
break;
rep.ret =
drm_bo_handle_validate(priv, req->handle, req->mask,
req->arg_handle, req->hint,
&rep);
break;
case drm_bo_fence:
rep.ret = drm_bo_lock_test(dev, filp);
if (rep.ret)
break;
/**/ break;
case drm_bo_info:
rep.ret = drm_bo_handle_info(priv, req->handle, &rep);
break;
case drm_bo_wait_idle:
rep.ret = drm_bo_handle_wait(priv, req->handle,
req->hint, &rep);
break;
case drm_bo_ref_fence:
rep.ret = -EINVAL;
DRM_ERROR("Function is not implemented yet.\n");
default:
rep.ret = -EINVAL;
}
next = arg.next;
/*
* A signal interrupted us. Make sure the ioctl is restartable.
*/
if (rep.ret == -EAGAIN)
return -EAGAIN;
arg.handled = 1;
arg.d.rep = rep;
DRM_COPY_TO_USER_IOCTL((void __user *)data, arg, sizeof(arg));
data = next;
} while (data);
return 0;
}
/*
* dev->struct_sem locked.
*/
static int drm_bo_force_list_clean(drm_device_t * dev,
struct list_head *head,
unsigned mem_type,
int force_no_move, int allow_errors)
{
drm_buffer_manager_t *bm = &dev->bm;
struct list_head *list, *next, *prev;
drm_buffer_object_t *entry;
int ret;
int clean;
retry:
clean = 1;
list_for_each_safe(list, next, head) {
prev = list->prev;
entry = drm_bo_entry(list, mem_type);
atomic_inc(&entry->usage);
mutex_unlock(&dev->struct_mutex);
mutex_lock(&entry->mutex);
mutex_lock(&dev->struct_mutex);
if (prev != list->prev || next != list->next) {
mutex_unlock(&entry->mutex);
goto retry;
}
if (drm_bo_mm_node(entry, mem_type)) {
clean = 0;
/*
* Expire the fence.
*/
mutex_unlock(&dev->struct_mutex);
if (entry->fence && bm->nice_mode) {
unsigned long _end = jiffies + 3 * DRM_HZ;
do {
ret = drm_bo_wait(entry, 0, 1, 0);
if (ret && allow_errors) {
if (ret == -EINTR)
ret = -EAGAIN;
goto out_err;
}
} while (ret && !time_after_eq(jiffies, _end));
if (entry->fence) {
bm->nice_mode = 0;
DRM_ERROR("Detected GPU hang or "
"fence manager was taken down. "
"Evicting waiting buffers\n");
}
}
if (entry->fence) {
drm_fence_usage_deref_unlocked(dev,
entry->fence);
entry->fence = NULL;
}
DRM_MASK_VAL(entry->priv_flags, _DRM_BO_FLAG_UNFENCED,
0);
if (force_no_move) {
DRM_MASK_VAL(entry->flags, DRM_BO_FLAG_NO_MOVE,
0);
}
if (entry->flags & DRM_BO_FLAG_NO_EVICT) {
DRM_ERROR("A DRM_BO_NO_EVICT buffer present at "
"cleanup. Removing flag and evicting.\n");
entry->flags &= ~DRM_BO_FLAG_NO_EVICT;
entry->mask &= ~DRM_BO_FLAG_NO_EVICT;
}
ret = drm_bo_evict(entry, mem_type, 1, force_no_move);
if (ret) {
if (allow_errors) {
goto out_err;
} else {
DRM_ERROR("Aargh. Eviction failed.\n");
}
}
mutex_lock(&dev->struct_mutex);
}
mutex_unlock(&entry->mutex);
drm_bo_usage_deref_locked(dev, entry);
if (prev != list->prev || next != list->next) {
goto retry;
}
}
if (!clean)
goto retry;
return 0;
out_err:
mutex_unlock(&entry->mutex);
drm_bo_usage_deref_unlocked(dev, entry);
mutex_lock(&dev->struct_mutex);
return ret;
}
int drm_bo_clean_mm(drm_device_t * dev, unsigned mem_type)
{
drm_buffer_manager_t *bm = &dev->bm;
int ret = -EINVAL;
if (mem_type >= DRM_BO_MEM_TYPES) {
DRM_ERROR("Illegal memory type %d\n", mem_type);
return ret;
}
if (!bm->has_type[mem_type]) {
DRM_ERROR("Trying to take down uninitialized "
"memory manager type\n");
return ret;
}
bm->use_type[mem_type] = 0;
bm->has_type[mem_type] = 0;
ret = 0;
if (mem_type > 0) {
/*
* Throw out unfenced buffers.
*/
drm_bo_force_list_clean(dev, &bm->unfenced, mem_type, 1, 0);
/*
* Throw out evicted no-move buffers.
*/
drm_bo_force_list_clean(dev, &bm->pinned[DRM_BO_MEM_LOCAL],
mem_type, 1, 0);
drm_bo_force_list_clean(dev, &bm->lru[mem_type], mem_type, 1,
0);
drm_bo_force_list_clean(dev, &bm->pinned[mem_type], mem_type, 1,
0);
if (drm_mm_clean(&bm->manager[mem_type])) {
drm_mm_takedown(&bm->manager[mem_type]);
} else {
ret = -EBUSY;
}
}
return ret;
}
static int drm_bo_lock_mm(drm_device_t * dev, unsigned mem_type)
{
int ret;
drm_buffer_manager_t *bm = &dev->bm;
if (mem_type == 0 || mem_type >= DRM_BO_MEM_TYPES) {
DRM_ERROR("Illegal memory manager memory type %u,\n", mem_type);
return -EINVAL;
}
ret = drm_bo_force_list_clean(dev, &bm->unfenced, mem_type, 0, 1);
if (ret)
return ret;
ret = drm_bo_force_list_clean(dev, &bm->lru[mem_type], mem_type, 0, 1);
if (ret)
return ret;
ret =
drm_bo_force_list_clean(dev, &bm->pinned[mem_type], mem_type, 0, 1);
return ret;
}
static int drm_bo_init_mm(drm_device_t * dev,
unsigned type,
unsigned long p_offset, unsigned long p_size)
{
drm_buffer_manager_t *bm = &dev->bm;
int ret = -EINVAL;
if (type >= DRM_BO_MEM_TYPES) {
DRM_ERROR("Illegal memory type %d\n", type);
return ret;
}
if (bm->has_type[type]) {
DRM_ERROR("Memory manager already initialized for type %d\n",
type);
return ret;
}
ret = 0;
if (type != DRM_BO_MEM_LOCAL) {
if (!p_size) {
DRM_ERROR("Zero size memory manager type %d\n", type);
return ret;
}
ret = drm_mm_init(&bm->manager[type], p_offset, p_size);
if (ret)
return ret;
}
bm->has_type[type] = 1;
bm->use_type[type] = 1;
INIT_LIST_HEAD(&bm->lru[type]);
INIT_LIST_HEAD(&bm->pinned[type]);
return 0;
}
int drm_bo_driver_finish(drm_device_t * dev)
{
drm_buffer_manager_t *bm = &dev->bm;
int ret = 0;
unsigned i = DRM_BO_MEM_TYPES;
mutex_lock(&dev->bm.init_mutex);
mutex_lock(&dev->struct_mutex);
if (!bm->initialized)
goto out;
while (i--) {
if (bm->has_type[i]) {
bm->use_type[i] = 0;
if ((i != DRM_BO_MEM_LOCAL) && drm_bo_clean_mm(dev, i)) {
ret = -EBUSY;
DRM_ERROR("DRM memory manager type %d "
"is not clean.\n", i);
}
bm->has_type[i] = 0;
}
}
mutex_unlock(&dev->struct_mutex);
drm_bo_delayed_delete(dev);
mutex_lock(&dev->struct_mutex);
bm->initialized = 0;
mutex_unlock(&dev->struct_mutex);
if (!cancel_delayed_work(&bm->wq)) {
flush_scheduled_work();
}
mutex_lock(&dev->struct_mutex);
out:
mutex_unlock(&dev->struct_mutex);
mutex_unlock(&dev->bm.init_mutex);
return ret;
}
int drm_bo_driver_init(drm_device_t * dev)
{
drm_bo_driver_t *driver = dev->driver->bo_driver;
drm_buffer_manager_t *bm = &dev->bm;
int ret = -EINVAL;
mutex_lock(&dev->bm.init_mutex);
mutex_lock(&dev->struct_mutex);
if (!driver)
goto out_unlock;
/*
* Initialize the system memory buffer type.
* Other types need to be driver / IOCTL initialized.
*/
ret = drm_bo_init_mm(dev, 0, 0, 0);
if (ret)
goto out_unlock;
INIT_WORK(&bm->wq, &drm_bo_delayed_workqueue, dev);
bm->initialized = 1;
bm->nice_mode = 1;
atomic_set(&bm->count, 0);
bm->cur_pages = 0;
INIT_LIST_HEAD(&bm->unfenced);
INIT_LIST_HEAD(&bm->ddestroy);
out_unlock:
mutex_unlock(&dev->struct_mutex);
mutex_unlock(&dev->bm.init_mutex);
return ret;
}
EXPORT_SYMBOL(drm_bo_driver_init);
int drm_mm_init_ioctl(DRM_IOCTL_ARGS)
{
DRM_DEVICE;
int ret = 0;
drm_mm_init_arg_t arg;
drm_buffer_manager_t *bm = &dev->bm;
drm_bo_driver_t *driver = dev->driver->bo_driver;
if (!driver) {
DRM_ERROR("Buffer objects are not supported by this driver\n");
return -EINVAL;
}
DRM_COPY_FROM_USER_IOCTL(arg, (void __user *)data, sizeof(arg));
switch (arg.req.op) {
case mm_init:
ret = -EINVAL;
mutex_lock(&dev->bm.init_mutex);
mutex_lock(&dev->struct_mutex);
if (!bm->initialized) {
DRM_ERROR("DRM memory manager was not initialized.\n");
break;
}
if (arg.req.mem_type == 0) {
DRM_ERROR
("System memory buffers already initialized.\n");
break;
}
ret = drm_bo_init_mm(dev, arg.req.mem_type,
arg.req.p_offset, arg.req.p_size);
break;
case mm_takedown:
LOCK_TEST_WITH_RETURN(dev, filp);
mutex_lock(&dev->bm.init_mutex);
mutex_lock(&dev->struct_mutex);
ret = -EINVAL;
if (!bm->initialized) {
DRM_ERROR("DRM memory manager was not initialized\n");
break;
}
if (arg.req.mem_type == 0) {
DRM_ERROR("No takedown for System memory buffers.\n");
break;
}
ret = 0;
if (drm_bo_clean_mm(dev, arg.req.mem_type)) {
DRM_ERROR("Memory manager type %d not clean. "
"Delaying takedown\n", arg.req.mem_type);
}
break;
case mm_lock:
LOCK_TEST_WITH_RETURN(dev, filp);
mutex_lock(&dev->bm.init_mutex);
mutex_lock(&dev->struct_mutex);
ret = drm_bo_lock_mm(dev, arg.req.mem_type);
break;
case mm_unlock:
LOCK_TEST_WITH_RETURN(dev, filp);
mutex_lock(&dev->bm.init_mutex);
mutex_lock(&dev->struct_mutex);
ret = 0;
break;
default:
DRM_ERROR("Function not implemented yet\n");
return -EINVAL;
}
mutex_unlock(&dev->struct_mutex);
mutex_unlock(&dev->bm.init_mutex);
if (ret)
return ret;
DRM_COPY_TO_USER_IOCTL((void __user *)data, arg, sizeof(arg));
return 0;
}
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