blob: 4eb410a2a1a830a3889371e702a561cb296f566e [file] [log] [blame]
/*
* Copyright (C) 2013-2017 Oracle Corporation
* This file is based on ast_ttm.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, 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: Dave Airlie <airlied@redhat.com>
* Michael Thayer <michael.thayer@oracle.com>
*/
#include "vbox_drv.h"
#include <ttm/ttm_page_alloc.h>
static inline struct vbox_private *vbox_bdev(struct ttm_bo_device *bd)
{
return container_of(bd, struct vbox_private, ttm.bdev);
}
static int vbox_ttm_mem_global_init(struct drm_global_reference *ref)
{
return ttm_mem_global_init(ref->object);
}
static void vbox_ttm_mem_global_release(struct drm_global_reference *ref)
{
ttm_mem_global_release(ref->object);
}
/**
* Adds the vbox memory manager object/structures to the global memory manager.
*/
static int vbox_ttm_global_init(struct vbox_private *vbox)
{
struct drm_global_reference *global_ref;
int ret;
global_ref = &vbox->ttm.mem_global_ref;
global_ref->global_type = DRM_GLOBAL_TTM_MEM;
global_ref->size = sizeof(struct ttm_mem_global);
global_ref->init = &vbox_ttm_mem_global_init;
global_ref->release = &vbox_ttm_mem_global_release;
ret = drm_global_item_ref(global_ref);
if (ret) {
DRM_ERROR("Failed setting up TTM memory subsystem.\n");
return ret;
}
vbox->ttm.bo_global_ref.mem_glob = vbox->ttm.mem_global_ref.object;
global_ref = &vbox->ttm.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;
ret = drm_global_item_ref(global_ref);
if (ret) {
DRM_ERROR("Failed setting up TTM BO subsystem.\n");
drm_global_item_unref(&vbox->ttm.mem_global_ref);
return ret;
}
return 0;
}
/**
* Removes the vbox memory manager object from the global memory manager.
*/
static void vbox_ttm_global_release(struct vbox_private *vbox)
{
drm_global_item_unref(&vbox->ttm.bo_global_ref.ref);
drm_global_item_unref(&vbox->ttm.mem_global_ref);
}
static void vbox_bo_ttm_destroy(struct ttm_buffer_object *tbo)
{
struct vbox_bo *bo;
bo = container_of(tbo, struct vbox_bo, bo);
drm_gem_object_release(&bo->gem);
kfree(bo);
}
static bool vbox_ttm_bo_is_vbox_bo(struct ttm_buffer_object *bo)
{
if (bo->destroy == &vbox_bo_ttm_destroy)
return true;
return false;
}
static int
vbox_bo_init_mem_type(struct ttm_bo_device *bdev, u32 type,
struct ttm_mem_type_manager *man)
{
switch (type) {
case TTM_PL_SYSTEM:
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:
man->func = &ttm_bo_manager_func;
man->flags = TTM_MEMTYPE_FLAG_FIXED | TTM_MEMTYPE_FLAG_MAPPABLE;
man->available_caching = TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_WC;
man->default_caching = TTM_PL_FLAG_WC;
break;
default:
DRM_ERROR("Unsupported memory type %u\n", (unsigned int)type);
return -EINVAL;
}
return 0;
}
static void
vbox_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
{
struct vbox_bo *vboxbo = vbox_bo(bo);
if (!vbox_ttm_bo_is_vbox_bo(bo))
return;
vbox_ttm_placement(vboxbo, TTM_PL_FLAG_SYSTEM);
*pl = vboxbo->placement;
}
static int vbox_bo_verify_access(struct ttm_buffer_object *bo,
struct file *filp)
{
return 0;
}
static int vbox_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 vbox_private *vbox = vbox_bdev(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.offset = mem->start << PAGE_SHIFT;
mem->bus.base = pci_resource_start(vbox->dev->pdev, 0);
mem->bus.is_iomem = true;
break;
default:
return -EINVAL;
}
return 0;
}
static void vbox_ttm_io_mem_free(struct ttm_bo_device *bdev,
struct ttm_mem_reg *mem)
{
}
static int vbox_bo_move(struct ttm_buffer_object *bo,
bool evict, bool interruptible,
bool no_wait_gpu, struct ttm_mem_reg *new_mem)
{
return ttm_bo_move_memcpy(bo, interruptible, no_wait_gpu, new_mem);
}
static void vbox_ttm_backend_destroy(struct ttm_tt *tt)
{
ttm_tt_fini(tt);
kfree(tt);
}
static struct ttm_backend_func vbox_tt_backend_func = {
.destroy = &vbox_ttm_backend_destroy,
};
static struct ttm_tt *vbox_ttm_tt_create(struct ttm_bo_device *bdev,
unsigned long size,
u32 page_flags,
struct page *dummy_read_page)
{
struct ttm_tt *tt;
tt = kzalloc(sizeof(*tt), GFP_KERNEL);
if (!tt)
return NULL;
tt->func = &vbox_tt_backend_func;
if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) {
kfree(tt);
return NULL;
}
return tt;
}
static int vbox_ttm_tt_populate(struct ttm_tt *ttm)
{
return ttm_pool_populate(ttm);
}
static void vbox_ttm_tt_unpopulate(struct ttm_tt *ttm)
{
ttm_pool_unpopulate(ttm);
}
static struct ttm_bo_driver vbox_bo_driver = {
.ttm_tt_create = vbox_ttm_tt_create,
.ttm_tt_populate = vbox_ttm_tt_populate,
.ttm_tt_unpopulate = vbox_ttm_tt_unpopulate,
.init_mem_type = vbox_bo_init_mem_type,
.eviction_valuable = ttm_bo_eviction_valuable,
.evict_flags = vbox_bo_evict_flags,
.move = vbox_bo_move,
.verify_access = vbox_bo_verify_access,
.io_mem_reserve = &vbox_ttm_io_mem_reserve,
.io_mem_free = &vbox_ttm_io_mem_free,
.io_mem_pfn = ttm_bo_default_io_mem_pfn,
};
int vbox_mm_init(struct vbox_private *vbox)
{
int ret;
struct drm_device *dev = vbox->dev;
struct ttm_bo_device *bdev = &vbox->ttm.bdev;
ret = vbox_ttm_global_init(vbox);
if (ret)
return ret;
ret = ttm_bo_device_init(&vbox->ttm.bdev,
vbox->ttm.bo_global_ref.ref.object,
&vbox_bo_driver,
dev->anon_inode->i_mapping,
DRM_FILE_PAGE_OFFSET, true);
if (ret) {
DRM_ERROR("Error initialising bo driver; %d\n", ret);
goto err_ttm_global_release;
}
ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
vbox->available_vram_size >> PAGE_SHIFT);
if (ret) {
DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
goto err_device_release;
}
#ifdef DRM_MTRR_WC
vbox->fb_mtrr = drm_mtrr_add(pci_resource_start(dev->pdev, 0),
pci_resource_len(dev->pdev, 0),
DRM_MTRR_WC);
#else
vbox->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
pci_resource_len(dev->pdev, 0));
#endif
return 0;
err_device_release:
ttm_bo_device_release(&vbox->ttm.bdev);
err_ttm_global_release:
vbox_ttm_global_release(vbox);
return ret;
}
void vbox_mm_fini(struct vbox_private *vbox)
{
#ifdef DRM_MTRR_WC
drm_mtrr_del(vbox->fb_mtrr,
pci_resource_start(vbox->dev->pdev, 0),
pci_resource_len(vbox->dev->pdev, 0), DRM_MTRR_WC);
#else
arch_phys_wc_del(vbox->fb_mtrr);
#endif
ttm_bo_device_release(&vbox->ttm.bdev);
vbox_ttm_global_release(vbox);
}
void vbox_ttm_placement(struct vbox_bo *bo, int domain)
{
unsigned int i;
u32 c = 0;
bo->placement.placement = bo->placements;
bo->placement.busy_placement = bo->placements;
if (domain & TTM_PL_FLAG_VRAM)
bo->placements[c++].flags =
TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM;
if (domain & TTM_PL_FLAG_SYSTEM)
bo->placements[c++].flags =
TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
if (!c)
bo->placements[c++].flags =
TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
bo->placement.num_placement = c;
bo->placement.num_busy_placement = c;
for (i = 0; i < c; ++i) {
bo->placements[i].fpfn = 0;
bo->placements[i].lpfn = 0;
}
}
int vbox_bo_create(struct drm_device *dev, int size, int align,
u32 flags, struct vbox_bo **pvboxbo)
{
struct vbox_private *vbox = dev->dev_private;
struct vbox_bo *vboxbo;
size_t acc_size;
int ret;
vboxbo = kzalloc(sizeof(*vboxbo), GFP_KERNEL);
if (!vboxbo)
return -ENOMEM;
ret = drm_gem_object_init(dev, &vboxbo->gem, size);
if (ret)
goto err_free_vboxbo;
vboxbo->bo.bdev = &vbox->ttm.bdev;
vbox_ttm_placement(vboxbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
acc_size = ttm_bo_dma_acc_size(&vbox->ttm.bdev, size,
sizeof(struct vbox_bo));
ret = ttm_bo_init(&vbox->ttm.bdev, &vboxbo->bo, size,
ttm_bo_type_device, &vboxbo->placement,
align >> PAGE_SHIFT, false, NULL, acc_size,
NULL, NULL, vbox_bo_ttm_destroy);
if (ret)
goto err_free_vboxbo;
*pvboxbo = vboxbo;
return 0;
err_free_vboxbo:
kfree(vboxbo);
return ret;
}
static inline u64 vbox_bo_gpu_offset(struct vbox_bo *bo)
{
return bo->bo.offset;
}
int vbox_bo_pin(struct vbox_bo *bo, u32 pl_flag, u64 *gpu_addr)
{
int i, ret;
if (bo->pin_count) {
bo->pin_count++;
if (gpu_addr)
*gpu_addr = vbox_bo_gpu_offset(bo);
return 0;
}
vbox_ttm_placement(bo, pl_flag);
for (i = 0; i < bo->placement.num_placement; i++)
bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
if (ret)
return ret;
bo->pin_count = 1;
if (gpu_addr)
*gpu_addr = vbox_bo_gpu_offset(bo);
return 0;
}
int vbox_bo_unpin(struct vbox_bo *bo)
{
int i, ret;
if (!bo->pin_count) {
DRM_ERROR("unpin bad %p\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;
ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
if (ret)
return ret;
return 0;
}
/*
* Move a vbox-owned buffer object to system memory if no one else has it
* pinned. The caller must have pinned it previously, and this call will
* release the caller's pin.
*/
int vbox_bo_push_sysram(struct vbox_bo *bo)
{
int i, ret;
if (!bo->pin_count) {
DRM_ERROR("unpin bad %p\n", bo);
return 0;
}
bo->pin_count--;
if (bo->pin_count)
return 0;
if (bo->kmap.virtual)
ttm_bo_kunmap(&bo->kmap);
vbox_ttm_placement(bo, TTM_PL_FLAG_SYSTEM);
for (i = 0; i < bo->placement.num_placement; i++)
bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
if (ret) {
DRM_ERROR("pushing to VRAM failed\n");
return ret;
}
return 0;
}
int vbox_mmap(struct file *filp, struct vm_area_struct *vma)
{
struct drm_file *file_priv;
struct vbox_private *vbox;
if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
return -EINVAL;
file_priv = filp->private_data;
vbox = file_priv->minor->dev->dev_private;
return ttm_bo_mmap(filp, vma, &vbox->ttm.bdev);
}