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linux-sg2042/drivers/gpu/drm/qxl/qxl_ttm.c

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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 <ttm/ttm_bo_api.h>
#include <ttm/ttm_bo_driver.h>
#include <ttm/ttm_placement.h>
#include <ttm/ttm_page_alloc.h>
#include <ttm/ttm_module.h>
#include <drm/drmP.h>
#include <drm/drm.h>
#include <drm/qxl_drm.h>
#include "qxl_drv.h"
#include "qxl_object.h"
#include <linux/delay.h>
static int qxl_ttm_debugfs_init(struct qxl_device *qdev);
static struct qxl_device *qxl_get_qdev(struct ttm_bo_device *bdev)
{
struct qxl_mman *mman;
struct qxl_device *qdev;
mman = container_of(bdev, struct qxl_mman, bdev);
qdev = container_of(mman, struct qxl_device, mman);
return qdev;
}
static int qxl_ttm_mem_global_init(struct drm_global_reference *ref)
{
return ttm_mem_global_init(ref->object);
}
static void qxl_ttm_mem_global_release(struct drm_global_reference *ref)
{
ttm_mem_global_release(ref->object);
}
static int qxl_ttm_global_init(struct qxl_device *qdev)
{
struct drm_global_reference *global_ref;
int r;
qdev->mman.mem_global_referenced = false;
global_ref = &qdev->mman.mem_global_ref;
global_ref->global_type = DRM_GLOBAL_TTM_MEM;
global_ref->size = sizeof(struct ttm_mem_global);
global_ref->init = &qxl_ttm_mem_global_init;
global_ref->release = &qxl_ttm_mem_global_release;
r = drm_global_item_ref(global_ref);
if (r != 0) {
DRM_ERROR("Failed setting up TTM memory accounting "
"subsystem.\n");
return r;
}
qdev->mman.bo_global_ref.mem_glob =
qdev->mman.mem_global_ref.object;
global_ref = &qdev->mman.bo_global_ref.ref;
global_ref->global_type = DRM_GLOBAL_TTM_BO;
global_ref->size = sizeof(struct ttm_bo_global);
global_ref->init = &ttm_bo_global_init;
global_ref->release = &ttm_bo_global_release;
r = drm_global_item_ref(global_ref);
if (r != 0) {
DRM_ERROR("Failed setting up TTM BO subsystem.\n");
drm_global_item_unref(&qdev->mman.mem_global_ref);
return r;
}
qdev->mman.mem_global_referenced = true;
return 0;
}
static void qxl_ttm_global_fini(struct qxl_device *qdev)
{
if (qdev->mman.mem_global_referenced) {
drm_global_item_unref(&qdev->mman.bo_global_ref.ref);
drm_global_item_unref(&qdev->mman.mem_global_ref);
qdev->mman.mem_global_referenced = false;
}
}
static struct vm_operations_struct qxl_ttm_vm_ops;
static const struct vm_operations_struct *ttm_vm_ops;
static int qxl_ttm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
{
struct ttm_buffer_object *bo;
int r;
bo = (struct ttm_buffer_object *)vma->vm_private_data;
if (bo == NULL)
return VM_FAULT_NOPAGE;
r = ttm_vm_ops->fault(vma, vmf);
return r;
}
int qxl_mmap(struct file *filp, struct vm_area_struct *vma)
{
struct drm_file *file_priv;
struct qxl_device *qdev;
int r;
if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET)) {
pr_info("%s: vma->vm_pgoff (%ld) < DRM_FILE_PAGE_OFFSET\n",
__func__, vma->vm_pgoff);
return drm_mmap(filp, vma);
}
file_priv = filp->private_data;
qdev = file_priv->minor->dev->dev_private;
if (qdev == NULL) {
DRM_ERROR(
"filp->private_data->minor->dev->dev_private == NULL\n");
return -EINVAL;
}
QXL_INFO(qdev, "%s: filp->private_data = 0x%p, vma->vm_pgoff = %lx\n",
__func__, filp->private_data, vma->vm_pgoff);
r = ttm_bo_mmap(filp, vma, &qdev->mman.bdev);
if (unlikely(r != 0))
return r;
if (unlikely(ttm_vm_ops == NULL)) {
ttm_vm_ops = vma->vm_ops;
qxl_ttm_vm_ops = *ttm_vm_ops;
qxl_ttm_vm_ops.fault = &qxl_ttm_fault;
}
vma->vm_ops = &qxl_ttm_vm_ops;
return 0;
}
static int qxl_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
{
return 0;
}
static int qxl_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
struct ttm_mem_type_manager *man)
{
switch (type) {
case TTM_PL_SYSTEM:
/* System memory */
man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
man->available_caching = TTM_PL_MASK_CACHING;
man->default_caching = TTM_PL_FLAG_CACHED;
break;
case TTM_PL_VRAM:
case TTM_PL_PRIV0:
/* "On-card" video ram */
man->func = &ttm_bo_manager_func;
man->gpu_offset = 0;
man->flags = TTM_MEMTYPE_FLAG_FIXED |
TTM_MEMTYPE_FLAG_MAPPABLE;
man->available_caching = TTM_PL_MASK_CACHING;
man->default_caching = TTM_PL_FLAG_CACHED;
break;
default:
DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
return -EINVAL;
}
return 0;
}
static void qxl_evict_flags(struct ttm_buffer_object *bo,
struct ttm_placement *placement)
{
struct qxl_bo *qbo;
static u32 placements = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
if (!qxl_ttm_bo_is_qxl_bo(bo)) {
placement->fpfn = 0;
placement->lpfn = 0;
placement->placement = &placements;
placement->busy_placement = &placements;
placement->num_placement = 1;
placement->num_busy_placement = 1;
return;
}
qbo = container_of(bo, struct qxl_bo, tbo);
qxl_ttm_placement_from_domain(qbo, QXL_GEM_DOMAIN_CPU, false);
*placement = qbo->placement;
}
static int qxl_verify_access(struct ttm_buffer_object *bo, struct file *filp)
{
struct qxl_bo *qbo = to_qxl_bo(bo);
return drm_vma_node_verify_access(&qbo->gem_base.vma_node, filp);
}
static int qxl_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
struct ttm_mem_reg *mem)
{
struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
struct qxl_device *qdev = qxl_get_qdev(bdev);
mem->bus.addr = NULL;
mem->bus.offset = 0;
mem->bus.size = mem->num_pages << PAGE_SHIFT;
mem->bus.base = 0;
mem->bus.is_iomem = false;
if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
return -EINVAL;
switch (mem->mem_type) {
case TTM_PL_SYSTEM:
/* system memory */
return 0;
case TTM_PL_VRAM:
mem->bus.is_iomem = true;
mem->bus.base = qdev->vram_base;
mem->bus.offset = mem->start << PAGE_SHIFT;
break;
case TTM_PL_PRIV0:
mem->bus.is_iomem = true;
mem->bus.base = qdev->surfaceram_base;
mem->bus.offset = mem->start << PAGE_SHIFT;
break;
default:
return -EINVAL;
}
return 0;
}
static void qxl_ttm_io_mem_free(struct ttm_bo_device *bdev,
struct ttm_mem_reg *mem)
{
}
/*
* TTM backend functions.
*/
struct qxl_ttm_tt {
struct ttm_dma_tt ttm;
struct qxl_device *qdev;
u64 offset;
};
static int qxl_ttm_backend_bind(struct ttm_tt *ttm,
struct ttm_mem_reg *bo_mem)
{
struct qxl_ttm_tt *gtt = (void *)ttm;
gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT);
if (!ttm->num_pages) {
WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n",
ttm->num_pages, bo_mem, ttm);
}
/* Not implemented */
return -1;
}
static int qxl_ttm_backend_unbind(struct ttm_tt *ttm)
{
/* Not implemented */
return -1;
}
static void qxl_ttm_backend_destroy(struct ttm_tt *ttm)
{
struct qxl_ttm_tt *gtt = (void *)ttm;
ttm_dma_tt_fini(&gtt->ttm);
kfree(gtt);
}
static struct ttm_backend_func qxl_backend_func = {
.bind = &qxl_ttm_backend_bind,
.unbind = &qxl_ttm_backend_unbind,
.destroy = &qxl_ttm_backend_destroy,
};
static int qxl_ttm_tt_populate(struct ttm_tt *ttm)
{
int r;
if (ttm->state != tt_unpopulated)
return 0;
r = ttm_pool_populate(ttm);
if (r)
return r;
return 0;
}
static void qxl_ttm_tt_unpopulate(struct ttm_tt *ttm)
{
ttm_pool_unpopulate(ttm);
}
static struct ttm_tt *qxl_ttm_tt_create(struct ttm_bo_device *bdev,
unsigned long size, uint32_t page_flags,
struct page *dummy_read_page)
{
struct qxl_device *qdev;
struct qxl_ttm_tt *gtt;
qdev = qxl_get_qdev(bdev);
gtt = kzalloc(sizeof(struct qxl_ttm_tt), GFP_KERNEL);
if (gtt == NULL)
return NULL;
gtt->ttm.ttm.func = &qxl_backend_func;
gtt->qdev = qdev;
if (ttm_dma_tt_init(&gtt->ttm, bdev, size, page_flags,
dummy_read_page)) {
kfree(gtt);
return NULL;
}
return &gtt->ttm.ttm;
}
static void qxl_move_null(struct ttm_buffer_object *bo,
struct ttm_mem_reg *new_mem)
{
struct ttm_mem_reg *old_mem = &bo->mem;
BUG_ON(old_mem->mm_node != NULL);
*old_mem = *new_mem;
new_mem->mm_node = NULL;
}
static int qxl_bo_move(struct ttm_buffer_object *bo,
bool evict, bool interruptible,
bool no_wait_gpu,
struct ttm_mem_reg *new_mem)
{
struct ttm_mem_reg *old_mem = &bo->mem;
if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
qxl_move_null(bo, new_mem);
return 0;
}
return ttm_bo_move_memcpy(bo, evict, no_wait_gpu, new_mem);
}
static int qxl_sync_obj_wait(void *sync_obj,
bool lazy, bool interruptible)
{
struct qxl_fence *qfence = (struct qxl_fence *)sync_obj;
int count = 0, sc = 0;
struct qxl_bo *bo = container_of(qfence, struct qxl_bo, fence);
if (qfence->num_active_releases == 0)
return 0;
retry:
if (sc == 0) {
if (bo->type == QXL_GEM_DOMAIN_SURFACE)
qxl_update_surface(qfence->qdev, bo);
} else if (sc >= 1) {
qxl_io_notify_oom(qfence->qdev);
}
sc++;
for (count = 0; count < 10; count++) {
bool ret;
ret = qxl_queue_garbage_collect(qfence->qdev, true);
if (ret == false)
break;
if (qfence->num_active_releases == 0)
return 0;
}
if (qfence->num_active_releases) {
bool have_drawable_releases = false;
void **slot;
struct radix_tree_iter iter;
int release_id;
radix_tree_for_each_slot(slot, &qfence->tree, &iter, 0) {
struct qxl_release *release;
release_id = iter.index;
release = qxl_release_from_id_locked(qfence->qdev, release_id);
if (release == NULL)
continue;
if (release->type == QXL_RELEASE_DRAWABLE)
have_drawable_releases = true;
}
qxl_queue_garbage_collect(qfence->qdev, true);
if (have_drawable_releases || sc < 4) {
if (sc > 2)
/* back off */
usleep_range(500, 1000);
if (have_drawable_releases && sc > 300) {
WARN(1, "sync obj %d still has outstanding releases %d %d %d %ld %d\n", sc, bo->surface_id, bo->is_primary, bo->pin_count, (unsigned long)bo->gem_base.size, qfence->num_active_releases);
return -EBUSY;
}
goto retry;
}
}
return 0;
}
static int qxl_sync_obj_flush(void *sync_obj)
{
return 0;
}
static void qxl_sync_obj_unref(void **sync_obj)
{
*sync_obj = NULL;
}
static void *qxl_sync_obj_ref(void *sync_obj)
{
return sync_obj;
}
static bool qxl_sync_obj_signaled(void *sync_obj)
{
struct qxl_fence *qfence = (struct qxl_fence *)sync_obj;
return (qfence->num_active_releases == 0);
}
static void qxl_bo_move_notify(struct ttm_buffer_object *bo,
struct ttm_mem_reg *new_mem)
{
struct qxl_bo *qbo;
struct qxl_device *qdev;
if (!qxl_ttm_bo_is_qxl_bo(bo))
return;
qbo = container_of(bo, struct qxl_bo, tbo);
qdev = qbo->gem_base.dev->dev_private;
if (bo->mem.mem_type == TTM_PL_PRIV0 && qbo->surface_id)
qxl_surface_evict(qdev, qbo, new_mem ? true : false);
}
static struct ttm_bo_driver qxl_bo_driver = {
.ttm_tt_create = &qxl_ttm_tt_create,
.ttm_tt_populate = &qxl_ttm_tt_populate,
.ttm_tt_unpopulate = &qxl_ttm_tt_unpopulate,
.invalidate_caches = &qxl_invalidate_caches,
.init_mem_type = &qxl_init_mem_type,
.evict_flags = &qxl_evict_flags,
.move = &qxl_bo_move,
.verify_access = &qxl_verify_access,
.io_mem_reserve = &qxl_ttm_io_mem_reserve,
.io_mem_free = &qxl_ttm_io_mem_free,
.sync_obj_signaled = &qxl_sync_obj_signaled,
.sync_obj_wait = &qxl_sync_obj_wait,
.sync_obj_flush = &qxl_sync_obj_flush,
.sync_obj_unref = &qxl_sync_obj_unref,
.sync_obj_ref = &qxl_sync_obj_ref,
.move_notify = &qxl_bo_move_notify,
};
int qxl_ttm_init(struct qxl_device *qdev)
{
int r;
int num_io_pages; /* != rom->num_io_pages, we include surface0 */
r = qxl_ttm_global_init(qdev);
if (r)
return r;
/* No others user of address space so set it to 0 */
r = ttm_bo_device_init(&qdev->mman.bdev,
qdev->mman.bo_global_ref.ref.object,
&qxl_bo_driver,
qdev->ddev->anon_inode->i_mapping,
DRM_FILE_PAGE_OFFSET, 0);
if (r) {
DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
return r;
}
/* NOTE: this includes the framebuffer (aka surface 0) */
num_io_pages = qdev->rom->ram_header_offset / PAGE_SIZE;
r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_VRAM,
num_io_pages);
if (r) {
DRM_ERROR("Failed initializing VRAM heap.\n");
return r;
}
r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_PRIV0,
qdev->surfaceram_size / PAGE_SIZE);
if (r) {
DRM_ERROR("Failed initializing Surfaces heap.\n");
return r;
}
DRM_INFO("qxl: %uM of VRAM memory size\n",
(unsigned)qdev->vram_size / (1024 * 1024));
DRM_INFO("qxl: %luM of IO pages memory ready (VRAM domain)\n",
((unsigned)num_io_pages * PAGE_SIZE) / (1024 * 1024));
DRM_INFO("qxl: %uM of Surface memory size\n",
(unsigned)qdev->surfaceram_size / (1024 * 1024));
r = qxl_ttm_debugfs_init(qdev);
if (r) {
DRM_ERROR("Failed to init debugfs\n");
return r;
}
return 0;
}
void qxl_ttm_fini(struct qxl_device *qdev)
{
ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_VRAM);
ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_PRIV0);
ttm_bo_device_release(&qdev->mman.bdev);
qxl_ttm_global_fini(qdev);
DRM_INFO("qxl: ttm finalized\n");
}
#define QXL_DEBUGFS_MEM_TYPES 2
#if defined(CONFIG_DEBUG_FS)
static int qxl_mm_dump_table(struct seq_file *m, void *data)
{
struct drm_info_node *node = (struct drm_info_node *)m->private;
struct drm_mm *mm = (struct drm_mm *)node->info_ent->data;
struct drm_device *dev = node->minor->dev;
struct qxl_device *rdev = dev->dev_private;
int ret;
struct ttm_bo_global *glob = rdev->mman.bdev.glob;
spin_lock(&glob->lru_lock);
ret = drm_mm_dump_table(m, mm);
spin_unlock(&glob->lru_lock);
return ret;
}
#endif
static int qxl_ttm_debugfs_init(struct qxl_device *qdev)
{
#if defined(CONFIG_DEBUG_FS)
static struct drm_info_list qxl_mem_types_list[QXL_DEBUGFS_MEM_TYPES];
static char qxl_mem_types_names[QXL_DEBUGFS_MEM_TYPES][32];
unsigned i;
for (i = 0; i < QXL_DEBUGFS_MEM_TYPES; i++) {
if (i == 0)
sprintf(qxl_mem_types_names[i], "qxl_mem_mm");
else
sprintf(qxl_mem_types_names[i], "qxl_surf_mm");
qxl_mem_types_list[i].name = qxl_mem_types_names[i];
qxl_mem_types_list[i].show = &qxl_mm_dump_table;
qxl_mem_types_list[i].driver_features = 0;
if (i == 0)
qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_VRAM].priv;
else
qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_PRIV0].priv;
}
return qxl_debugfs_add_files(qdev, qxl_mem_types_list, i);
#else
return 0;
#endif
}
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