blob: 035d71332d182ce6340c9212f9cf56b4da292b4e [file] [log] [blame]
/*
* Copyright 2020 Advanced Micro Devices, 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: Christian K├Ânig
*/
#include <linux/dma-buf-map.h>
#include <linux/io-mapping.h>
#include <linux/scatterlist.h>
#include <drm/ttm/ttm_resource.h>
#include <drm/ttm/ttm_bo_driver.h>
void ttm_resource_init(struct ttm_buffer_object *bo,
const struct ttm_place *place,
struct ttm_resource *res)
{
res->start = 0;
res->num_pages = PFN_UP(bo->base.size);
res->mem_type = place->mem_type;
res->placement = place->flags;
res->bus.addr = NULL;
res->bus.offset = 0;
res->bus.is_iomem = false;
res->bus.caching = ttm_cached;
}
EXPORT_SYMBOL(ttm_resource_init);
int ttm_resource_alloc(struct ttm_buffer_object *bo,
const struct ttm_place *place,
struct ttm_resource **res_ptr)
{
struct ttm_resource_manager *man =
ttm_manager_type(bo->bdev, place->mem_type);
return man->func->alloc(man, bo, place, res_ptr);
}
void ttm_resource_free(struct ttm_buffer_object *bo, struct ttm_resource **res)
{
struct ttm_resource_manager *man;
if (!*res)
return;
man = ttm_manager_type(bo->bdev, (*res)->mem_type);
man->func->free(man, *res);
*res = NULL;
}
EXPORT_SYMBOL(ttm_resource_free);
static bool ttm_resource_places_compat(struct ttm_resource *res,
const struct ttm_place *places,
unsigned num_placement)
{
unsigned i;
if (res->placement & TTM_PL_FLAG_TEMPORARY)
return false;
for (i = 0; i < num_placement; i++) {
const struct ttm_place *heap = &places[i];
if (res->start < heap->fpfn || (heap->lpfn &&
(res->start + res->num_pages) > heap->lpfn))
continue;
if ((res->mem_type == heap->mem_type) &&
(!(heap->flags & TTM_PL_FLAG_CONTIGUOUS) ||
(res->placement & TTM_PL_FLAG_CONTIGUOUS)))
return true;
}
return false;
}
/**
* ttm_resource_compat - check if resource is compatible with placement
*
* @res: the resource to check
* @placement: the placement to check against
*
* Returns true if the placement is compatible.
*/
bool ttm_resource_compat(struct ttm_resource *res,
struct ttm_placement *placement)
{
if (ttm_resource_places_compat(res, placement->placement,
placement->num_placement))
return true;
if ((placement->busy_placement != placement->placement ||
placement->num_busy_placement > placement->num_placement) &&
ttm_resource_places_compat(res, placement->busy_placement,
placement->num_busy_placement))
return true;
return false;
}
EXPORT_SYMBOL(ttm_resource_compat);
/**
* ttm_resource_manager_init
*
* @man: memory manager object to init
* @p_size: size managed area in pages.
*
* Initialise core parts of a manager object.
*/
void ttm_resource_manager_init(struct ttm_resource_manager *man,
unsigned long p_size)
{
unsigned i;
spin_lock_init(&man->move_lock);
man->size = p_size;
for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i)
INIT_LIST_HEAD(&man->lru[i]);
man->move = NULL;
}
EXPORT_SYMBOL(ttm_resource_manager_init);
/*
* ttm_resource_manager_evict_all
*
* @bdev - device to use
* @man - manager to use
*
* Evict all the objects out of a memory manager until it is empty.
* Part of memory manager cleanup sequence.
*/
int ttm_resource_manager_evict_all(struct ttm_device *bdev,
struct ttm_resource_manager *man)
{
struct ttm_operation_ctx ctx = {
.interruptible = false,
.no_wait_gpu = false,
.force_alloc = true
};
struct dma_fence *fence;
int ret;
unsigned i;
/*
* Can't use standard list traversal since we're unlocking.
*/
spin_lock(&bdev->lru_lock);
for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
while (!list_empty(&man->lru[i])) {
spin_unlock(&bdev->lru_lock);
ret = ttm_mem_evict_first(bdev, man, NULL, &ctx,
NULL);
if (ret)
return ret;
spin_lock(&bdev->lru_lock);
}
}
spin_unlock(&bdev->lru_lock);
spin_lock(&man->move_lock);
fence = dma_fence_get(man->move);
spin_unlock(&man->move_lock);
if (fence) {
ret = dma_fence_wait(fence, false);
dma_fence_put(fence);
if (ret)
return ret;
}
return 0;
}
EXPORT_SYMBOL(ttm_resource_manager_evict_all);
/**
* ttm_resource_manager_debug
*
* @man: manager type to dump.
* @p: printer to use for debug.
*/
void ttm_resource_manager_debug(struct ttm_resource_manager *man,
struct drm_printer *p)
{
drm_printf(p, " use_type: %d\n", man->use_type);
drm_printf(p, " use_tt: %d\n", man->use_tt);
drm_printf(p, " size: %llu\n", man->size);
if (man->func->debug)
man->func->debug(man, p);
}
EXPORT_SYMBOL(ttm_resource_manager_debug);
static void ttm_kmap_iter_iomap_map_local(struct ttm_kmap_iter *iter,
struct dma_buf_map *dmap,
pgoff_t i)
{
struct ttm_kmap_iter_iomap *iter_io =
container_of(iter, typeof(*iter_io), base);
void __iomem *addr;
retry:
while (i >= iter_io->cache.end) {
iter_io->cache.sg = iter_io->cache.sg ?
sg_next(iter_io->cache.sg) : iter_io->st->sgl;
iter_io->cache.i = iter_io->cache.end;
iter_io->cache.end += sg_dma_len(iter_io->cache.sg) >>
PAGE_SHIFT;
iter_io->cache.offs = sg_dma_address(iter_io->cache.sg) -
iter_io->start;
}
if (i < iter_io->cache.i) {
iter_io->cache.end = 0;
iter_io->cache.sg = NULL;
goto retry;
}
addr = io_mapping_map_local_wc(iter_io->iomap, iter_io->cache.offs +
(((resource_size_t)i - iter_io->cache.i)
<< PAGE_SHIFT));
dma_buf_map_set_vaddr_iomem(dmap, addr);
}
static void ttm_kmap_iter_iomap_unmap_local(struct ttm_kmap_iter *iter,
struct dma_buf_map *map)
{
io_mapping_unmap_local(map->vaddr_iomem);
}
static const struct ttm_kmap_iter_ops ttm_kmap_iter_io_ops = {
.map_local = ttm_kmap_iter_iomap_map_local,
.unmap_local = ttm_kmap_iter_iomap_unmap_local,
.maps_tt = false,
};
/**
* ttm_kmap_iter_iomap_init - Initialize a struct ttm_kmap_iter_iomap
* @iter_io: The struct ttm_kmap_iter_iomap to initialize.
* @iomap: The struct io_mapping representing the underlying linear io_memory.
* @st: sg_table into @iomap, representing the memory of the struct
* ttm_resource.
* @start: Offset that needs to be subtracted from @st to make
* sg_dma_address(st->sgl) - @start == 0 for @iomap start.
*
* Return: Pointer to the embedded struct ttm_kmap_iter.
*/
struct ttm_kmap_iter *
ttm_kmap_iter_iomap_init(struct ttm_kmap_iter_iomap *iter_io,
struct io_mapping *iomap,
struct sg_table *st,
resource_size_t start)
{
iter_io->base.ops = &ttm_kmap_iter_io_ops;
iter_io->iomap = iomap;
iter_io->st = st;
iter_io->start = start;
memset(&iter_io->cache, 0, sizeof(iter_io->cache));
return &iter_io->base;
}
EXPORT_SYMBOL(ttm_kmap_iter_iomap_init);
/**
* DOC: Linear io iterator
*
* This code should die in the not too near future. Best would be if we could
* make io-mapping use memremap for all io memory, and have memremap
* implement a kmap_local functionality. We could then strip a huge amount of
* code. These linear io iterators are implemented to mimic old functionality,
* and they don't use kmap_local semantics at all internally. Rather ioremap or
* friends, and at least on 32-bit they add global TLB flushes and points
* of failure.
*/
static void ttm_kmap_iter_linear_io_map_local(struct ttm_kmap_iter *iter,
struct dma_buf_map *dmap,
pgoff_t i)
{
struct ttm_kmap_iter_linear_io *iter_io =
container_of(iter, typeof(*iter_io), base);
*dmap = iter_io->dmap;
dma_buf_map_incr(dmap, i * PAGE_SIZE);
}
static const struct ttm_kmap_iter_ops ttm_kmap_iter_linear_io_ops = {
.map_local = ttm_kmap_iter_linear_io_map_local,
.maps_tt = false,
};
/**
* ttm_kmap_iter_linear_io_init - Initialize an iterator for linear io memory
* @iter_io: The iterator to initialize
* @bdev: The TTM device
* @mem: The ttm resource representing the iomap.
*
* This function is for internal TTM use only. It sets up a memcpy kmap iterator
* pointing at a linear chunk of io memory.
*
* Return: A pointer to the embedded struct ttm_kmap_iter or error pointer on
* failure.
*/
struct ttm_kmap_iter *
ttm_kmap_iter_linear_io_init(struct ttm_kmap_iter_linear_io *iter_io,
struct ttm_device *bdev,
struct ttm_resource *mem)
{
int ret;
ret = ttm_mem_io_reserve(bdev, mem);
if (ret)
goto out_err;
if (!mem->bus.is_iomem) {
ret = -EINVAL;
goto out_io_free;
}
if (mem->bus.addr) {
dma_buf_map_set_vaddr(&iter_io->dmap, mem->bus.addr);
iter_io->needs_unmap = false;
} else {
size_t bus_size = (size_t)mem->num_pages << PAGE_SHIFT;
iter_io->needs_unmap = true;
memset(&iter_io->dmap, 0, sizeof(iter_io->dmap));
if (mem->bus.caching == ttm_write_combined)
dma_buf_map_set_vaddr_iomem(&iter_io->dmap,
ioremap_wc(mem->bus.offset,
bus_size));
else if (mem->bus.caching == ttm_cached)
dma_buf_map_set_vaddr(&iter_io->dmap,
memremap(mem->bus.offset, bus_size,
MEMREMAP_WB |
MEMREMAP_WT |
MEMREMAP_WC));
/* If uncached requested or if mapping cached or wc failed */
if (dma_buf_map_is_null(&iter_io->dmap))
dma_buf_map_set_vaddr_iomem(&iter_io->dmap,
ioremap(mem->bus.offset,
bus_size));
if (dma_buf_map_is_null(&iter_io->dmap)) {
ret = -ENOMEM;
goto out_io_free;
}
}
iter_io->base.ops = &ttm_kmap_iter_linear_io_ops;
return &iter_io->base;
out_io_free:
ttm_mem_io_free(bdev, mem);
out_err:
return ERR_PTR(ret);
}
/**
* ttm_kmap_iter_linear_io_fini - Clean up an iterator for linear io memory
* @iter_io: The iterator to initialize
* @bdev: The TTM device
* @mem: The ttm resource representing the iomap.
*
* This function is for internal TTM use only. It cleans up a memcpy kmap
* iterator initialized by ttm_kmap_iter_linear_io_init.
*/
void
ttm_kmap_iter_linear_io_fini(struct ttm_kmap_iter_linear_io *iter_io,
struct ttm_device *bdev,
struct ttm_resource *mem)
{
if (iter_io->needs_unmap && dma_buf_map_is_set(&iter_io->dmap)) {
if (iter_io->dmap.is_iomem)
iounmap(iter_io->dmap.vaddr_iomem);
else
memunmap(iter_io->dmap.vaddr);
}
ttm_mem_io_free(bdev, mem);
}