/*
* 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 <linux/iosys-map.h>
#include <linux/io-mapping.h>
#include "qxl_drv.h"
#include "qxl_object.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 = to_qxl(bo->tbo.base.dev);
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)
{
u32 c = 0;
u32 pflag = 0;
unsigned int i;
if (qbo->tbo.base.size <= PAGE_SIZE)
pflag |= TTM_PL_FLAG_TOPDOWN;
qbo->placement.placement = qbo->placements;
if (domain == QXL_GEM_DOMAIN_VRAM) {
qbo->placements[c].mem_type = TTM_PL_VRAM;
qbo->placements[c++].flags = pflag;
}
if (domain == QXL_GEM_DOMAIN_SURFACE) {
qbo->placements[c].mem_type = TTM_PL_PRIV;
qbo->placements[c++].flags = pflag;
qbo->placements[c].mem_type = TTM_PL_VRAM;
qbo->placements[c++].flags = pflag;
}
if (domain == QXL_GEM_DOMAIN_CPU) {
qbo->placements[c].mem_type = TTM_PL_SYSTEM;
qbo->placements[c++].flags = pflag;
}
if (!c) {
qbo->placements[c].mem_type = TTM_PL_SYSTEM;
qbo->placements[c++].flags = 0;
}
qbo->placement.num_placement = c;
for (i = 0; i < c; ++i) {
qbo->placements[i].fpfn = 0;
qbo->placements[i].lpfn = 0;
}
}
static const struct drm_gem_object_funcs qxl_object_funcs = {
.free = qxl_gem_object_free,
.open = qxl_gem_object_open,
.close = qxl_gem_object_close,
.pin = qxl_gem_prime_pin,
.unpin = qxl_gem_prime_unpin,
.get_sg_table = qxl_gem_prime_get_sg_table,
.vmap = qxl_gem_prime_vmap,
.vunmap = qxl_gem_prime_vunmap,
.mmap = drm_gem_ttm_mmap,
.print_info = drm_gem_ttm_print_info,
};
int qxl_bo_create(struct qxl_device *qdev, unsigned long size,
bool kernel, bool pinned, u32 domain, u32 priority,
struct qxl_surface *surf,
struct qxl_bo **bo_ptr)
{
struct ttm_operation_ctx ctx = { !kernel, false };
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->tbo.base.funcs = &qxl_object_funcs;
bo->type = domain;
bo->surface_id = 0;
INIT_LIST_HEAD(&bo->list);
if (surf)
bo->surf = *surf;
qxl_ttm_placement_from_domain(bo, domain);
bo->tbo.priority = priority;
r = ttm_bo_init_reserved(&qdev->mman.bdev, &bo->tbo, type,
&bo->placement, 0, &ctx, 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;
}
if (pinned)
ttm_bo_pin(&bo->tbo);
ttm_bo_unreserve(&bo->tbo);
*bo_ptr = bo;
return 0;
}
int qxl_bo_vmap_locked(struct qxl_bo *bo, struct iosys_map *map)
{
int r;
dma_resv_assert_held(bo->tbo.base.resv);
if (bo->kptr) {
bo->map_count++;
goto out;
}
r = ttm_bo_vmap(&bo->tbo, &bo->map);
if (r) {
qxl_bo_unpin_locked(bo);
return r;
}
bo->map_count = 1;
/* TODO: Remove kptr in favor of map everywhere. */
if (bo->map.is_iomem)
bo->kptr = (void *)bo->map.vaddr_iomem;
else
bo->kptr = bo->map.vaddr;
out:
*map = bo->map;
return 0;
}
int qxl_bo_pin_and_vmap(struct qxl_bo *bo, struct iosys_map *map)
{
int r;
r = qxl_bo_reserve(bo);
if (r)
return r;
r = qxl_bo_pin_locked(bo);
if (r) {
qxl_bo_unreserve(bo);
return r;
}
r = qxl_bo_vmap_locked(bo, map);
if (r)
qxl_bo_unpin_locked(bo);
qxl_bo_unreserve(bo);
return r;
}
void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev,
struct qxl_bo *bo, int page_offset)
{
unsigned long offset;
void *rptr;
int ret;
struct io_mapping *map;
struct iosys_map bo_map;
if (bo->tbo.resource->mem_type == TTM_PL_VRAM)
map = qdev->vram_mapping;
else if (bo->tbo.resource->mem_type == TTM_PL_PRIV)
map = qdev->surface_mapping;
else
goto fallback;
offset = bo->tbo.resource->start << PAGE_SHIFT;
return io_mapping_map_atomic_wc(map, offset + page_offset);
fallback:
if (bo->kptr) {
rptr = bo->kptr + (page_offset * PAGE_SIZE);
return rptr;
}
ret = qxl_bo_vmap_locked(bo, &bo_map);
if (ret)
return NULL;
rptr = bo_map.vaddr; /* TODO: Use mapping abstraction properly */
rptr += page_offset * PAGE_SIZE;
return rptr;
}
void qxl_bo_vunmap_locked(struct qxl_bo *bo)
{
dma_resv_assert_held(bo->tbo.base.resv);
if (bo->kptr == NULL)
return;
bo->map_count--;
if (bo->map_count > 0)
return;
bo->kptr = NULL;
ttm_bo_vunmap(&bo->tbo, &bo->map);
}
int qxl_bo_vunmap_and_unpin(struct qxl_bo *bo)
{
int r;
r = qxl_bo_reserve(bo);
if (r)
return r;
qxl_bo_vunmap_locked(bo);
qxl_bo_unpin_locked(bo);
qxl_bo_unreserve(bo);
return 0;
}
void qxl_bo_kunmap_atomic_page(struct qxl_device *qdev,
struct qxl_bo *bo, void *pmap)
{
if ((bo->tbo.resource->mem_type != TTM_PL_VRAM) &&
(bo->tbo.resource->mem_type != TTM_PL_PRIV))
goto fallback;
io_mapping_unmap_atomic(pmap);
return;
fallback:
qxl_bo_vunmap_locked(bo);
}
void qxl_bo_unref(struct qxl_bo **bo)
{
if ((*bo) == NULL)
return;
drm_gem_object_put(&(*bo)->tbo.base);
*bo = NULL;
}
struct qxl_bo *qxl_bo_ref(struct qxl_bo *bo)
{
drm_gem_object_get(&bo->tbo.base);
return bo;
}
int qxl_bo_pin_locked(struct qxl_bo *bo)
{
struct ttm_operation_ctx ctx = { false, false };
struct drm_device *ddev = bo->tbo.base.dev;
int r;
dma_resv_assert_held(bo->tbo.base.resv);
if (bo->tbo.pin_count) {
ttm_bo_pin(&bo->tbo);
return 0;
}
qxl_ttm_placement_from_domain(bo, bo->type);
r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
if (likely(r == 0))
ttm_bo_pin(&bo->tbo);
if (unlikely(r != 0))
dev_err(ddev->dev, "%p pin failed\n", bo);
return r;
}
void qxl_bo_unpin_locked(struct qxl_bo *bo)
{
dma_resv_assert_held(bo->tbo.base.resv);
ttm_bo_unpin(&bo->tbo);
}
/*
* Reserve the BO before pinning the object. If the BO was reserved
* beforehand, use the internal version directly qxl_bo_pin_locked.
*
*/
int qxl_bo_pin(struct qxl_bo *bo)
{
int r;
r = qxl_bo_reserve(bo);
if (r)
return r;
r = qxl_bo_pin_locked(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_locked.
*
*/
int qxl_bo_unpin(struct qxl_bo *bo)
{
int r;
r = qxl_bo_reserve(bo);
if (r)
return r;
qxl_bo_unpin_locked(bo);
qxl_bo_unreserve(bo);
return 0;
}
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(&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)
{
struct ttm_resource_manager *man;
man = ttm_manager_type(&qdev->mman.bdev, TTM_PL_PRIV);
return ttm_resource_manager_evict_all(&qdev->mman.bdev, man);
}
int qxl_vram_evict(struct qxl_device *qdev)
{
struct ttm_resource_manager *man;
man = ttm_manager_type(&qdev->mman.bdev, TTM_PL_VRAM);
return ttm_resource_manager_evict_all(&qdev->mman.bdev, man);
}
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