geemili
/
drm
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
drm/linux-core/drm_bo_move.c

412 lines
10 KiB
C
Raw Blame History

/**************************************************************************
*
* Copyright (c) 2007 Tungsten Graphics, Inc., Cedar Park, TX., 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 above copyright notice and this permission notice (including the
* next paragraph) 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 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.
*
**************************************************************************/
/*
* Authors: Thomas Hellström <thomas-at-tungstengraphics-dot-com>
*/
#include "drmP.h"
/**
* Free the old memory node unless it's a pinned region and we
* have not been requested to free also pinned regions.
*/
static void drm_bo_free_old_node(drm_buffer_object_t * bo)
{
drm_bo_mem_reg_t *old_mem = &bo->mem;
if (old_mem->mm_node && (old_mem->mm_node != bo->pinned_node)) {
mutex_lock(&bo->dev->struct_mutex);
drm_mm_put_block(old_mem->mm_node);
old_mem->mm_node = NULL;
mutex_unlock(&bo->dev->struct_mutex);
}
old_mem->mm_node = NULL;
}
int drm_bo_move_ttm(drm_buffer_object_t * bo,
int evict, int no_wait, drm_bo_mem_reg_t * new_mem)
{
drm_ttm_t *ttm = bo->ttm;
drm_bo_mem_reg_t *old_mem = &bo->mem;
uint32_t save_flags = old_mem->flags;
uint32_t save_mask = old_mem->mask;
int ret;
if (old_mem->mem_type == DRM_BO_MEM_TT) {
if (evict)
drm_ttm_evict(ttm);
else
drm_ttm_unbind(ttm);
drm_bo_free_old_node(bo);
DRM_FLAG_MASKED(old_mem->flags,
DRM_BO_FLAG_CACHED | DRM_BO_FLAG_MAPPABLE |
DRM_BO_FLAG_MEM_LOCAL, DRM_BO_MASK_MEMTYPE);
old_mem->mem_type = DRM_BO_MEM_LOCAL;
save_flags = old_mem->flags;
}
if (new_mem->mem_type != DRM_BO_MEM_LOCAL) {
ret = drm_bind_ttm(ttm,
new_mem->flags & DRM_BO_FLAG_CACHED,
new_mem->mm_node->start);
if (ret)
return ret;
}
*old_mem = *new_mem;
new_mem->mm_node = NULL;
old_mem->mask = save_mask;
DRM_FLAG_MASKED(save_flags, new_mem->flags, DRM_BO_MASK_MEMTYPE);
return 0;
}
EXPORT_SYMBOL(drm_bo_move_ttm);
/**
* \c Return a kernel virtual address to the buffer object PCI memory.
*
* \param bo The buffer object.
* \return Failure indication.
*
* Returns -EINVAL if the buffer object is currently not mappable.
* Returns -ENOMEM if the ioremap operation failed.
* Otherwise returns zero.
*
* After a successfull call, bo->iomap contains the virtual address, or NULL
* if the buffer object content is not accessible through PCI space.
* Call bo->mutex locked.
*/
int drm_mem_reg_ioremap(drm_device_t * dev, drm_bo_mem_reg_t * mem,
void **virtual)
{
drm_buffer_manager_t *bm = &dev->bm;
drm_mem_type_manager_t *man = &bm->man[mem->mem_type];
unsigned long bus_offset;
unsigned long bus_size;
unsigned long bus_base;
int ret;
void *addr;
*virtual = NULL;
ret = drm_bo_pci_offset(dev, mem, &bus_base, &bus_offset, &bus_size);
if (ret || bus_size == 0)
return ret;
if (!(man->flags & _DRM_FLAG_NEEDS_IOREMAP))
addr = (void *)(((u8 *) man->io_addr) + bus_offset);
else {
addr = ioremap_nocache(bus_base + bus_offset, bus_size);
if (!addr)
return -ENOMEM;
}
*virtual = addr;
return 0;
}
/**
* \c Unmap mapping obtained using drm_bo_ioremap
*
* \param bo The buffer object.
*
* Call bo->mutex locked.
*/
void drm_mem_reg_iounmap(drm_device_t * dev, drm_bo_mem_reg_t * mem,
void *virtual)
{
drm_buffer_manager_t *bm;
drm_mem_type_manager_t *man;
bm = &dev->bm;
man = &bm->man[mem->mem_type];
if (virtual && (man->flags & _DRM_FLAG_NEEDS_IOREMAP)) {
iounmap(virtual);
}
}
static int drm_copy_io_page(void *dst, void *src, unsigned long page)
{
uint32_t *dstP =
(uint32_t *) ((unsigned long)dst + (page << PAGE_SHIFT));
uint32_t *srcP =
(uint32_t *) ((unsigned long)src + (page << PAGE_SHIFT));
int i;
for (i = 0; i < PAGE_SIZE / sizeof(uint32_t); ++i)
iowrite32(ioread32(srcP++), dstP++);
return 0;
}
static int drm_copy_io_ttm_page(drm_ttm_t * ttm, void *src, unsigned long page)
{
struct page *d = drm_ttm_get_page(ttm, page);
void *dst;
if (!d)
return -ENOMEM;
src = (void *)((unsigned long)src + (page << PAGE_SHIFT));
dst = kmap(d);
if (!dst)
return -ENOMEM;
memcpy_fromio(dst, src, PAGE_SIZE);
kunmap(d);
return 0;
}
static int drm_copy_ttm_io_page(drm_ttm_t * ttm, void *dst, unsigned long page)
{
struct page *s = drm_ttm_get_page(ttm, page);
void *src;
if (!s)
return -ENOMEM;
dst = (void *)((unsigned long)dst + (page << PAGE_SHIFT));
src = kmap(s);
if (!src)
return -ENOMEM;
memcpy_toio(dst, src, PAGE_SIZE);
kunmap(s);
return 0;
}
int drm_bo_move_memcpy(drm_buffer_object_t * bo,
int evict, int no_wait, drm_bo_mem_reg_t * new_mem)
{
drm_device_t *dev = bo->dev;
drm_mem_type_manager_t *man = &dev->bm.man[new_mem->mem_type];
drm_ttm_t *ttm = bo->ttm;
drm_bo_mem_reg_t *old_mem = &bo->mem;
drm_bo_mem_reg_t old_copy = *old_mem;
void *old_iomap;
void *new_iomap;
int ret;
uint32_t save_flags = old_mem->flags;
uint32_t save_mask = old_mem->mask;
unsigned long i;
unsigned long page;
unsigned long add = 0;
int dir;
ret = drm_mem_reg_ioremap(dev, old_mem, &old_iomap);
if (ret)
return ret;
ret = drm_mem_reg_ioremap(dev, new_mem, &new_iomap);
if (ret)
goto out;
if (old_iomap == NULL && new_iomap == NULL)
goto out2;
if (old_iomap == NULL && ttm == NULL)
goto out2;
add = 0;
dir = 1;
if ((old_mem->mem_type == new_mem->mem_type) &&
(new_mem->mm_node->start <
old_mem->mm_node->start + old_mem->mm_node->size)) {
dir = -1;
add = new_mem->num_pages - 1;
}
for (i = 0; i < new_mem->num_pages; ++i) {
page = i * dir + add;
if (old_iomap == NULL)
ret = drm_copy_ttm_io_page(ttm, new_iomap, page);
else if (new_iomap == NULL)
ret = drm_copy_io_ttm_page(ttm, old_iomap, page);
else
ret = drm_copy_io_page(new_iomap, old_iomap, page);
if (ret)
goto out1;
}
mb();
out2:
drm_bo_free_old_node(bo);
*old_mem = *new_mem;
new_mem->mm_node = NULL;
old_mem->mask = save_mask;
DRM_FLAG_MASKED(save_flags, new_mem->flags, DRM_BO_MASK_MEMTYPE);
if ((man->flags & _DRM_FLAG_MEMTYPE_FIXED) && (ttm != NULL)) {
drm_ttm_unbind(ttm);
drm_destroy_ttm(ttm);
bo->ttm = NULL;
}
out1:
drm_mem_reg_iounmap(dev, new_mem, new_iomap);
out:
drm_mem_reg_iounmap(dev, &old_copy, old_iomap);
return ret;
}
EXPORT_SYMBOL(drm_bo_move_memcpy);
/*
* Transfer a buffer object's memory and LRU status to a newly
* created object. User-space references remains with the old
* object. Call bo->mutex locked.
*/
int drm_buffer_object_transfer(drm_buffer_object_t * bo,
drm_buffer_object_t ** new_obj)
{
drm_buffer_object_t *fbo;
drm_device_t *dev = bo->dev;
drm_buffer_manager_t *bm = &dev->bm;
fbo = drm_ctl_calloc(1, sizeof(*fbo), DRM_MEM_BUFOBJ);
if (!fbo)
return -ENOMEM;
*fbo = *bo;
mutex_init(&fbo->mutex);
mutex_lock(&fbo->mutex);
mutex_lock(&dev->struct_mutex);
DRM_INIT_WAITQUEUE(&bo->event_queue);
INIT_LIST_HEAD(&fbo->ddestroy);
INIT_LIST_HEAD(&fbo->lru);
INIT_LIST_HEAD(&fbo->pinned_lru);
#ifdef DRM_ODD_MM_COMPAT
INIT_LIST_HEAD(&fbo->vma_list);
INIT_LIST_HEAD(&fbo->p_mm_list);
#endif
drm_fence_reference_unlocked(&fbo->fence, bo->fence);
fbo->pinned_node = NULL;
fbo->mem.mm_node->private = (void *)fbo;
atomic_set(&fbo->usage, 1);
atomic_inc(&bm->count);
mutex_unlock(&dev->struct_mutex);
mutex_unlock(&fbo->mutex);
*new_obj = fbo;
return 0;
}
/*
* Since move is underway, we need to block signals in this function.
* We cannot restart until it has finished.
*/
int drm_bo_move_accel_cleanup(drm_buffer_object_t * bo,
int evict,
int no_wait,
uint32_t fence_class,
uint32_t fence_type,
uint32_t fence_flags, drm_bo_mem_reg_t * new_mem)
{
drm_device_t *dev = bo->dev;
drm_mem_type_manager_t *man = &dev->bm.man[new_mem->mem_type];
drm_bo_mem_reg_t *old_mem = &bo->mem;
int ret;
uint32_t save_flags = old_mem->flags;
uint32_t save_mask = old_mem->mask;
drm_buffer_object_t *old_obj;
if (bo->fence)
drm_fence_usage_deref_unlocked(&bo->fence);
ret = drm_fence_object_create(dev, fence_class, fence_type,
fence_flags | DRM_FENCE_FLAG_EMIT,
&bo->fence);
if (ret)
return ret;
#ifdef DRM_ODD_MM_COMPAT
/*
* In this mode, we don't allow pipelining a copy blit,
* since the buffer will be accessible from user space
* the moment we return and rebuild the page tables.
*
* With normal vm operation, page tables are rebuilt
* on demand using fault(), which waits for buffer idle.
*/
if (1)
#else
if (evict || ((bo->mem.mm_node == bo->pinned_node) &&
bo->mem.mm_node != NULL))
#endif
{
ret = drm_bo_wait(bo, 0, 1, 0);
if (ret)
return ret;
drm_bo_free_old_node(bo);
if ((man->flags & _DRM_FLAG_MEMTYPE_FIXED) && (bo->ttm != NULL)) {
drm_ttm_unbind(bo->ttm);
drm_destroy_ttm(bo->ttm);
bo->ttm = NULL;
}
} else {
/* This should help pipeline ordinary buffer moves.
*
* Hang old buffer memory on a new buffer object,
* and leave it to be released when the GPU
* operation has completed.
*/
ret = drm_buffer_object_transfer(bo, &old_obj);
if (ret)
return ret;
if (!(man->flags & _DRM_FLAG_MEMTYPE_FIXED))
old_obj->ttm = NULL;
else
bo->ttm = NULL;
mutex_lock(&dev->struct_mutex);
list_del_init(&old_obj->lru);
DRM_FLAG_MASKED(bo->priv_flags, 0, _DRM_BO_FLAG_UNFENCED);
drm_bo_add_to_lru(old_obj);
drm_bo_usage_deref_locked(&old_obj);
mutex_unlock(&dev->struct_mutex);
}
*old_mem = *new_mem;
new_mem->mm_node = NULL;
old_mem->mask = save_mask;
DRM_FLAG_MASKED(save_flags, new_mem->flags, DRM_BO_MASK_MEMTYPE);
return 0;
}
EXPORT_SYMBOL(drm_bo_move_accel_cleanup);
Reference in New Issue View Git Blame Copy Permalink