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/*
* Copyright 2013 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.
*
* Authors: Dave Airlie
* Alon Levy
*/
#include "qxl_drv.h"
#include "qxl_object.h"
#include <linux/io-mapping.h>
static void qxl_ttm_bo_destroy(struct ttm_buffer_object *tbo)
{
struct qxl_bo *bo;
struct qxl_device *qdev;
bo = to_qxl_bo(tbo);
qdev = (struct qxl_device *)bo->tbo.base.dev->dev_private;
qxl_surface_evict(qdev, bo, false);
WARN_ON_ONCE(bo->map_count > 0);
mutex_lock(&qdev->gem.mutex);
list_del_init(&bo->list);
mutex_unlock(&qdev->gem.mutex);
drm_gem_object_release(&bo->tbo.base);
kfree(bo);
}
bool qxl_ttm_bo_is_qxl_bo(struct ttm_buffer_object *bo)
{
if (bo->destroy == &qxl_ttm_bo_destroy)
return true;
return false;
}
void qxl_ttm_placement_from_domain(struct qxl_bo *qbo, u32 domain, bool pinned)
{
u32 c = 0;
u32 pflag = pinned ? TTM_PL_FLAG_NO_EVICT : 0;
unsigned int i;
qbo->placement.placement = qbo->placements;
qbo->placement.busy_placement = qbo->placements;
if (domain == QXL_GEM_DOMAIN_VRAM)
qbo->placements[c++].flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_VRAM | pflag;
if (domain == QXL_GEM_DOMAIN_SURFACE) {
qbo->placements[c++].flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_PRIV | pflag;
qbo->placements[c++].flags = TTM_PL_FLAG_CACHED | TTM_PL_FLAG_VRAM | pflag;
}
if (domain == QXL_GEM_DOMAIN_CPU)
qbo->placements[c++].flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM | pflag;
if (!c)
qbo->placements[c++].flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
qbo->placement.num_placement = c;
qbo->placement.num_busy_placement = c;
for (i = 0; i < c; ++i) {
qbo->placements[i].fpfn = 0;
qbo->placements[i].lpfn = 0;
}
}
int qxl_bo_create(struct qxl_device *qdev,
unsigned long size, bool kernel, bool pinned, u32 domain,
struct qxl_surface *surf,
struct qxl_bo **bo_ptr)
{
struct qxl_bo *bo;
enum ttm_bo_type type;
int r;
if (kernel)
type = ttm_bo_type_kernel;
else
type = ttm_bo_type_device;
*bo_ptr = NULL;
bo = kzalloc(sizeof(struct qxl_bo), GFP_KERNEL);
if (bo == NULL)
return -ENOMEM;
size = roundup(size, PAGE_SIZE);
r = drm_gem_object_init(&qdev->ddev, &bo->tbo.base, size);
if (unlikely(r)) {
kfree(bo);
return r;
}
bo->type = domain;
bo->pin_count = pinned ? 1 : 0;
bo->surface_id = 0;
INIT_LIST_HEAD(&bo->list);
if (surf)
bo->surf = *surf;
qxl_ttm_placement_from_domain(bo, domain, pinned);
r = ttm_bo_init(&qdev->mman.bdev, &bo->tbo, size, type,
&bo->placement, 0, !kernel, size,
NULL, NULL, &qxl_ttm_bo_destroy);
if (unlikely(r != 0)) {
if (r != -ERESTARTSYS)
dev_err(qdev->ddev.dev,
"object_init failed for (%lu, 0x%08X)\n",
size, domain);
return r;
}
*bo_ptr = bo;
return 0;
}
int qxl_bo_kmap(struct qxl_bo *bo, void **ptr)
{
bool is_iomem;
int r;
if (bo->kptr) {
if (ptr)
*ptr = bo->kptr;
bo->map_count++;
return 0;
}
r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap);
if (r)
return r;
bo->kptr = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
if (ptr)
*ptr = bo->kptr;
bo->map_count = 1;
return 0;
}
void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev,
struct qxl_bo *bo, int page_offset)
{
struct ttm_mem_type_manager *man = &bo->tbo.bdev->man[bo->tbo.mem.mem_type];
void *rptr;
int ret;
struct io_mapping *map;
if (bo->tbo.mem.mem_type == TTM_PL_VRAM)
map = qdev->vram_mapping;
else if (bo->tbo.mem.mem_type == TTM_PL_PRIV)
map = qdev->surface_mapping;
else
goto fallback;
(void) ttm_mem_io_lock(man, false);
ret = ttm_mem_io_reserve(bo->tbo.bdev, &bo->tbo.mem);
ttm_mem_io_unlock(man);
return io_mapping_map_atomic_wc(map, bo->tbo.mem.bus.offset + page_offset);
fallback:
if (bo->kptr) {
rptr = bo->kptr + (page_offset * PAGE_SIZE);
return rptr;
}
ret = qxl_bo_kmap(bo, &rptr);
if (ret)
return NULL;
rptr += page_offset * PAGE_SIZE;
return rptr;
}
void qxl_bo_kunmap(struct qxl_bo *bo)
{
if (bo->kptr == NULL)
return;
bo->map_count--;
if (bo->map_count > 0)
return;
bo->kptr = NULL;
ttm_bo_kunmap(&bo->kmap);
}
void qxl_bo_kunmap_atomic_page(struct qxl_device *qdev,
struct qxl_bo *bo, void *pmap)
{
struct ttm_mem_type_manager *man = &bo->tbo.bdev->man[bo->tbo.mem.mem_type];
if ((bo->tbo.mem.mem_type != TTM_PL_VRAM) &&
(bo->tbo.mem.mem_type != TTM_PL_PRIV))
goto fallback;
io_mapping_unmap_atomic(pmap);
(void) ttm_mem_io_lock(man, false);
ttm_mem_io_free(bo->tbo.bdev, &bo->tbo.mem);
ttm_mem_io_unlock(man);
return;
fallback:
qxl_bo_kunmap(bo);
}
void qxl_bo_unref(struct qxl_bo **bo)
{
if ((*bo) == NULL)
return;
drm_gem_object_put_unlocked(&(*bo)->tbo.base);
*bo = NULL;
}
struct qxl_bo *qxl_bo_ref(struct qxl_bo *bo)
{
drm_gem_object_get(&bo->tbo.base);
return bo;
}
static int __qxl_bo_pin(struct qxl_bo *bo)
{
struct ttm_operation_ctx ctx = { false, false };
struct drm_device *ddev = bo->tbo.base.dev;
int r;
if (bo->pin_count) {
bo->pin_count++;
return 0;
}
qxl_ttm_placement_from_domain(bo, bo->type, true);
r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
if (likely(r == 0)) {
bo->pin_count = 1;
}
if (unlikely(r != 0))
dev_err(ddev->dev, "%p pin failed\n", bo);
return r;
}
static int __qxl_bo_unpin(struct qxl_bo *bo)
{
struct ttm_operation_ctx ctx = { false, false };
struct drm_device *ddev = bo->tbo.base.dev;
int r, i;
if (!bo->pin_count) {
dev_warn(ddev->dev, "%p unpin not necessary\n", bo);
return 0;
}
bo->pin_count--;
if (bo->pin_count)
return 0;
for (i = 0; i < bo->placement.num_placement; i++)
bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
if (unlikely(r != 0))
dev_err(ddev->dev, "%p validate failed for unpin\n", bo);
return r;
}
/*
* Reserve the BO before pinning the object. If the BO was reserved
* beforehand, use the internal version directly __qxl_bo_pin.
*
*/
int qxl_bo_pin(struct qxl_bo *bo)
{
int r;
r = qxl_bo_reserve(bo, false);
if (r)
return r;
r = __qxl_bo_pin(bo);
qxl_bo_unreserve(bo);
return r;
}
/*
* Reserve the BO before pinning the object. If the BO was reserved
* beforehand, use the internal version directly __qxl_bo_unpin.
*
*/
int qxl_bo_unpin(struct qxl_bo *bo)
{
int r;
r = qxl_bo_reserve(bo, false);
if (r)
return r;
r = __qxl_bo_unpin(bo);
qxl_bo_unreserve(bo);
return r;
}
void qxl_bo_force_delete(struct qxl_device *qdev)
{
struct qxl_bo *bo, *n;
if (list_empty(&qdev->gem.objects))
return;
dev_err(qdev->ddev.dev, "Userspace still has active objects !\n");
list_for_each_entry_safe(bo, n, &qdev->gem.objects, list) {
dev_err(qdev->ddev.dev, "%p %p %lu %lu force free\n",
&bo->tbo.base, bo, (unsigned long)bo->tbo.base.size,
*((unsigned long *)&bo->tbo.base.refcount));
mutex_lock(&qdev->gem.mutex);
list_del_init(&bo->list);
mutex_unlock(&qdev->gem.mutex);
/* this should unref the ttm bo */
drm_gem_object_put_unlocked(&bo->tbo.base);
}
}
int qxl_bo_init(struct qxl_device *qdev)
{
return qxl_ttm_init(qdev);
}
void qxl_bo_fini(struct qxl_device *qdev)
{
qxl_ttm_fini(qdev);
}
int qxl_bo_check_id(struct qxl_device *qdev, struct qxl_bo *bo)
{
int ret;
if (bo->type == QXL_GEM_DOMAIN_SURFACE && bo->surface_id == 0) {
/* allocate a surface id for this surface now */
ret = qxl_surface_id_alloc(qdev, bo);
if (ret)
return ret;
ret = qxl_hw_surface_alloc(qdev, bo);
if (ret)
return ret;
}
return 0;
}
int qxl_surf_evict(struct qxl_device *qdev)
{
return ttm_bo_evict_mm(&qdev->mman.bdev, TTM_PL_PRIV);
}
int qxl_vram_evict(struct qxl_device *qdev)
{
return ttm_bo_evict_mm(&qdev->mman.bdev, TTM_PL_VRAM);
}
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