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Commit 256dd44b authored by Christian König's avatar Christian König
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drm/ttm: nuke old page allocator 

Not used any more.
Signed-off-by: default avatarChristian König <christian.koenig@amd.com>
Reviewed-by: default avatarDave Airlie <airlied@redhat.com>
Reviewed-by: default avatarMadhav Chauhan <madhav.chauhan@amd.com>
Tested-by: default avatarHuang Rui <ray.huang@amd.com>
Link: https://patchwork.freedesktop.org/patch/397087/?series=83051&rev=1
parent fbf1c39c
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Showing with 2 additions and 2633 deletions
drivers/gpu/drm/Kconfig
View file @ 256dd44b
......@@ -182,13 +182,6 @@ config DRM_TTM
GPU memory types. Will be enabled automatically if a device driver
uses it.
config DRM_TTM_DMA_PAGE_POOL
bool
depends on DRM_TTM && (SWIOTLB || INTEL_IOMMU)
default y
help
Choose this if you need the TTM dma page pool
config DRM_VRAM_HELPER
tristate
depends on DRM
......
drivers/gpu/drm/ttm/Makefile
View file @ 256dd44b
......@@ -4,9 +4,8 @@
ttm-y := ttm_memory.o ttm_tt.o ttm_bo.o \
ttm_bo_util.o ttm_bo_vm.o ttm_module.o \
ttm_execbuf_util.o ttm_page_alloc.o ttm_range_manager.o \
ttm_execbuf_util.o ttm_range_manager.o \
ttm_resource.o ttm_pool.o
ttm-$(CONFIG_AGP) += ttm_agp_backend.o
ttm-$(CONFIG_DRM_TTM_DMA_PAGE_POOL) += ttm_page_alloc_dma.o
obj-$(CONFIG_DRM_TTM) += ttm.o
drivers/gpu/drm/ttm/ttm_agp_backend.c
View file @ 256dd44b
......@@ -34,7 +34,6 @@
#include <drm/ttm/ttm_module.h>
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_page_alloc.h>
#include <drm/ttm/ttm_placement.h>
#include <linux/agp_backend.h>
#include <linux/module.h>
......
drivers/gpu/drm/ttm/ttm_bo.c
View file @ 256dd44b
......@@ -1333,7 +1333,6 @@ int ttm_bo_device_init(struct ttm_bo_device *bdev,
INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue);
INIT_LIST_HEAD(&bdev->ddestroy);
bdev->dev_mapping = mapping;
bdev->need_dma32 = use_dma32;
mutex_lock(&ttm_global_mutex);
list_add_tail(&bdev->device_list, &glob->device_list);
mutex_unlock(&ttm_global_mutex);
......
drivers/gpu/drm/ttm/ttm_memory.c
View file @ 256dd44b
......@@ -30,7 +30,6 @@
#include <drm/ttm/ttm_memory.h>
#include <drm/ttm/ttm_module.h>
#include <drm/ttm/ttm_page_alloc.h>
#include <linux/spinlock.h>
#include <linux/sched.h>
#include <linux/wait.h>
......@@ -452,9 +451,7 @@ int ttm_mem_global_init(struct ttm_mem_global *glob)
pr_info("Zone %7s: Available graphics memory: %llu KiB\n",
zone->name, (unsigned long long)zone->max_mem >> 10);
}
ttm_page_alloc_init(glob, glob->zone_kernel->max_mem/(2*PAGE_SIZE));
ttm_dma_page_alloc_init(glob, glob->zone_kernel->max_mem/(2*PAGE_SIZE));
ttm_pool_mgr_init(glob->zone_kernel->max_mem / (2 * PAGE_SIZE));
ttm_pool_mgr_init(glob->zone_kernel->max_mem/(2*PAGE_SIZE));
return 0;
out_no_zone:
ttm_mem_global_release(glob);
......@@ -467,8 +464,6 @@ void ttm_mem_global_release(struct ttm_mem_global *glob)
unsigned int i;
/* let the page allocator first stop the shrink work. */
ttm_page_alloc_fini();
ttm_dma_page_alloc_fini();
ttm_pool_mgr_fini();
flush_workqueue(glob->swap_queue);
......
drivers/gpu/drm/ttm/ttm_page_alloc.c deleted 100644 → 0
View file @ fbf1c39c
/*
* Copyright (c) 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 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 AUTHORS OR COPYRIGHT HOLDERS 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 <airlied@redhat.com>
* Jerome Glisse <jglisse@redhat.com>
* Pauli Nieminen <suokkos@gmail.com>
*/
/* simple list based uncached page pool
* - Pool collects resently freed pages for reuse
* - Use page->lru to keep a free list
* - doesn't track currently in use pages
*/
#define pr_fmt(fmt) "[TTM] " fmt
#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/highmem.h>
#include <linux/mm_types.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/seq_file.h> /* for seq_printf */
#include <linux/slab.h>
#include <linux/dma-mapping.h>
#include <linux/atomic.h>
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_page_alloc.h>
#include "ttm_set_memory.h"
#define NUM_PAGES_TO_ALLOC (PAGE_SIZE/sizeof(struct page *))
#define SMALL_ALLOCATION 16
#define FREE_ALL_PAGES (~0U)
/* times are in msecs */
#define PAGE_FREE_INTERVAL 1000
/**
* struct ttm_page_pool - Pool to reuse recently allocated uc/wc pages.
*
* @lock: Protects the shared pool from concurrnet access. Must be used with
* irqsave/irqrestore variants because pool allocator maybe called from
* delayed work.
* @fill_lock: Prevent concurrent calls to fill.
* @list: Pool of free uc/wc pages for fast reuse.
* @gfp_flags: Flags to pass for alloc_page.
* @npages: Number of pages in pool.
*/
struct ttm_page_pool {
spinlock_t lock;
bool fill_lock;
struct list_head list;
gfp_t gfp_flags;
unsigned npages;
char *name;
unsigned long nfrees;
unsigned long nrefills;
unsigned int order;
};
/**
* Limits for the pool. They are handled without locks because only place where
* they may change is in sysfs store. They won't have immediate effect anyway
* so forcing serialization to access them is pointless.
*/
struct ttm_pool_opts {
unsigned alloc_size;
unsigned max_size;
unsigned small;
};
#define NUM_POOLS 6
/**
* struct ttm_pool_manager - Holds memory pools for fst allocation
*
* Manager is read only object for pool code so it doesn't need locking.
*
* @free_interval: minimum number of jiffies between freeing pages from pool.
* @page_alloc_inited: reference counting for pool allocation.
* @work: Work that is used to shrink the pool. Work is only run when there is
* some pages to free.
* @small_allocation: Limit in number of pages what is small allocation.
*
* @pools: All pool objects in use.
**/
struct ttm_pool_manager {
struct kobject kobj;
struct shrinker mm_shrink;
struct ttm_pool_opts options;
union {
struct ttm_page_pool pools[NUM_POOLS];
struct {
struct ttm_page_pool wc_pool;
struct ttm_page_pool uc_pool;
struct ttm_page_pool wc_pool_dma32;
struct ttm_page_pool uc_pool_dma32;
struct ttm_page_pool wc_pool_huge;
struct ttm_page_pool uc_pool_huge;
} ;
};
};
static struct attribute ttm_page_pool_max = {
.name = "pool_max_size",
.mode = S_IRUGO | S_IWUSR
};
static struct attribute ttm_page_pool_small = {
.name = "pool_small_allocation",
.mode = S_IRUGO | S_IWUSR
};
static struct attribute ttm_page_pool_alloc_size = {
.name = "pool_allocation_size",
.mode = S_IRUGO | S_IWUSR
};
static struct attribute *ttm_pool_attrs[] = {
&ttm_page_pool_max,
&ttm_page_pool_small,
&ttm_page_pool_alloc_size,
NULL
};
static void ttm_pool_kobj_release(struct kobject *kobj)
{
struct ttm_pool_manager *m =
container_of(kobj, struct ttm_pool_manager, kobj);
kfree(m);
}
static ssize_t ttm_pool_store(struct kobject *kobj,
struct attribute *attr, const char *buffer, size_t size)
{
struct ttm_pool_manager *m =
container_of(kobj, struct ttm_pool_manager, kobj);
int chars;
unsigned val;
chars = sscanf(buffer, "%u", &val);
if (chars == 0)
return size;
/* Convert kb to number of pages */
val = val / (PAGE_SIZE >> 10);
if (attr == &ttm_page_pool_max)
m->options.max_size = val;
else if (attr == &ttm_page_pool_small)
m->options.small = val;
else if (attr == &ttm_page_pool_alloc_size) {
if (val > NUM_PAGES_TO_ALLOC*8) {
pr_err("Setting allocation size to %lu is not allowed. Recommended size is %lu\n",
NUM_PAGES_TO_ALLOC*(PAGE_SIZE >> 7),
NUM_PAGES_TO_ALLOC*(PAGE_SIZE >> 10));
return size;
} else if (val > NUM_PAGES_TO_ALLOC) {
pr_warn("Setting allocation size to larger than %lu is not recommended\n",
NUM_PAGES_TO_ALLOC*(PAGE_SIZE >> 10));
}
m->options.alloc_size = val;
}
return size;
}
static ssize_t ttm_pool_show(struct kobject *kobj,
struct attribute *attr, char *buffer)
{
struct ttm_pool_manager *m =
container_of(kobj, struct ttm_pool_manager, kobj);
unsigned val = 0;
if (attr == &ttm_page_pool_max)
val = m->options.max_size;
else if (attr == &ttm_page_pool_small)
val = m->options.small;
else if (attr == &ttm_page_pool_alloc_size)
val = m->options.alloc_size;
val = val * (PAGE_SIZE >> 10);
return snprintf(buffer, PAGE_SIZE, "%u\n", val);
}
static const struct sysfs_ops ttm_pool_sysfs_ops = {
.show = &ttm_pool_show,
.store = &ttm_pool_store,
};
static struct kobj_type ttm_pool_kobj_type = {
.release = &ttm_pool_kobj_release,
.sysfs_ops = &ttm_pool_sysfs_ops,
.default_attrs = ttm_pool_attrs,
};
static struct ttm_pool_manager *_manager;
/**
* Select the right pool or requested caching state and ttm flags. */
static struct ttm_page_pool *ttm_get_pool(int flags, bool huge,
enum ttm_caching cstate)
{
int pool_index;
if (cstate == ttm_cached)
return NULL;
if (cstate == ttm_write_combined)
pool_index = 0x0;
else
pool_index = 0x1;
if (flags & TTM_PAGE_FLAG_DMA32) {
if (huge)
return NULL;
pool_index |= 0x2;
} else if (huge) {
pool_index |= 0x4;
}
return &_manager->pools[pool_index];
}
/* set memory back to wb and free the pages. */
static void ttm_pages_put(struct page *pages[], unsigned npages,
unsigned int order)
{
unsigned int i, pages_nr = (1 << order);
if (order == 0) {
if (ttm_set_pages_array_wb(pages, npages))
pr_err("Failed to set %d pages to wb!\n", npages);
}
for (i = 0; i < npages; ++i) {
if (order > 0) {
if (ttm_set_pages_wb(pages[i], pages_nr))
pr_err("Failed to set %d pages to wb!\n", pages_nr);
}
__free_pages(pages[i], order);
}
}
static void ttm_pool_update_free_locked(struct ttm_page_pool *pool,
unsigned freed_pages)
{
pool->npages -= freed_pages;
pool->nfrees += freed_pages;
}
/**
* Free pages from pool.
*
* To prevent hogging the ttm_swap process we only free NUM_PAGES_TO_ALLOC
* number of pages in one go.
*
* @pool: to free the pages from
* @free_all: If set to true will free all pages in pool
* @use_static: Safe to use static buffer
**/
static int ttm_page_pool_free(struct ttm_page_pool *pool, unsigned nr_free,
bool use_static)
{
static struct page *static_buf[NUM_PAGES_TO_ALLOC];
unsigned long irq_flags;
struct page *p;
struct page **pages_to_free;
unsigned freed_pages = 0,
npages_to_free = nr_free;
if (NUM_PAGES_TO_ALLOC < nr_free)
npages_to_free = NUM_PAGES_TO_ALLOC;
if (use_static)
pages_to_free = static_buf;
else
pages_to_free = kmalloc_array(npages_to_free,
sizeof(struct page *),
GFP_KERNEL);
if (!pages_to_free) {
pr_debug("Failed to allocate memory for pool free operation\n");
return 0;
}
restart:
spin_lock_irqsave(&pool->lock, irq_flags);
list_for_each_entry_reverse(p, &pool->list, lru) {
if (freed_pages >= npages_to_free)
break;
pages_to_free[freed_pages++] = p;
/* We can only remove NUM_PAGES_TO_ALLOC at a time. */
if (freed_pages >= NUM_PAGES_TO_ALLOC) {
/* remove range of pages from the pool */
__list_del(p->lru.prev, &pool->list);
ttm_pool_update_free_locked(pool, freed_pages);
/**
* Because changing page caching is costly
* we unlock the pool to prevent stalling.
*/
spin_unlock_irqrestore(&pool->lock, irq_flags);
ttm_pages_put(pages_to_free, freed_pages, pool->order);
if (likely(nr_free != FREE_ALL_PAGES))
nr_free -= freed_pages;
if (NUM_PAGES_TO_ALLOC >= nr_free)
npages_to_free = nr_free;
else
npages_to_free = NUM_PAGES_TO_ALLOC;
freed_pages = 0;
/* free all so restart the processing */
if (nr_free)
goto restart;
/* Not allowed to fall through or break because
* following context is inside spinlock while we are
* outside here.
*/
goto out;
}
}
/* remove range of pages from the pool */
if (freed_pages) {
__list_del(&p->lru, &pool->list);
ttm_pool_update_free_locked(pool, freed_pages);
nr_free -= freed_pages;
}
spin_unlock_irqrestore(&pool->lock, irq_flags);
if (freed_pages)
ttm_pages_put(pages_to_free, freed_pages, pool->order);
out:
if (pages_to_free != static_buf)
kfree(pages_to_free);
return nr_free;
}
/**
* Callback for mm to request pool to reduce number of page held.
*
* XXX: (dchinner) Deadlock warning!
*
* This code is crying out for a shrinker per pool....
*/
static unsigned long
ttm_pool_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
{
static DEFINE_MUTEX(lock);
static unsigned start_pool;
unsigned i;
unsigned pool_offset;
struct ttm_page_pool *pool;
int shrink_pages = sc->nr_to_scan;
unsigned long freed = 0;
unsigned int nr_free_pool;
if (!mutex_trylock(&lock))
return SHRINK_STOP;
pool_offset = ++start_pool % NUM_POOLS;
/* select start pool in round robin fashion */
for (i = 0; i < NUM_POOLS; ++i) {
unsigned nr_free = shrink_pages;
unsigned page_nr;
if (shrink_pages == 0)
break;
pool = &_manager->pools[(i + pool_offset)%NUM_POOLS];
page_nr = (1 << pool->order);
/* OK to use static buffer since global mutex is held. */
nr_free_pool = roundup(nr_free, page_nr) >> pool->order;
shrink_pages = ttm_page_pool_free(pool, nr_free_pool, true);
freed += (nr_free_pool - shrink_pages) << pool->order;
if (freed >= sc->nr_to_scan)
break;
shrink_pages <<= pool->order;
}
mutex_unlock(&lock);
return freed;
}
static unsigned long
ttm_pool_shrink_count(struct shrinker *shrink, struct shrink_control *sc)
{
unsigned i;
unsigned long count = 0;
struct ttm_page_pool *pool;
for (i = 0; i < NUM_POOLS; ++i) {
pool = &_manager->pools[i];
count += (pool->npages << pool->order);
}
return count;
}
static int ttm_pool_mm_shrink_init(struct ttm_pool_manager *manager)
{
manager->mm_shrink.count_objects = ttm_pool_shrink_count;
manager->mm_shrink.scan_objects = ttm_pool_shrink_scan;
manager->mm_shrink.seeks = 1;
return register_shrinker(&manager->mm_shrink);
}
static void ttm_pool_mm_shrink_fini(struct ttm_pool_manager *manager)
{
unregister_shrinker(&manager->mm_shrink);
}
static int ttm_set_pages_caching(struct page **pages,
enum ttm_caching cstate, unsigned cpages)
{
int r = 0;
/* Set page caching */
switch (cstate) {
case ttm_uncached:
r = ttm_set_pages_array_uc(pages, cpages);
if (r)
pr_err("Failed to set %d pages to uc!\n", cpages);
break;
case ttm_write_combined:
r = ttm_set_pages_array_wc(pages, cpages);
if (r)
pr_err("Failed to set %d pages to wc!\n", cpages);
break;
default:
break;
}
return r;
}
/**
* Free pages the pages that failed to change the caching state. If there is
* any pages that have changed their caching state already put them to the
* pool.
*/
static void ttm_handle_caching_failure(struct page **failed_pages,
unsigned cpages)
{
unsigned i;
/* Failed pages have to be freed */
for (i = 0; i < cpages; ++i) {
list_del(&failed_pages[i]->lru);
__free_page(failed_pages[i]);
}
}
/**
* Allocate new pages with correct caching.
*
* This function is reentrant if caller updates count depending on number of
* pages returned in pages array.
*/
static int ttm_alloc_new_pages(struct list_head *pages, gfp_t gfp_flags,
int ttm_flags, enum ttm_caching cstate,
unsigned count, unsigned order)
{
struct page **caching_array;
struct page *p;
int r = 0;
unsigned i, j, cpages;
unsigned npages = 1 << order;
unsigned max_cpages = min(count << order, (unsigned)NUM_PAGES_TO_ALLOC);
/* allocate array for page caching change */
caching_array = kmalloc_array(max_cpages, sizeof(struct page *),
GFP_KERNEL);
if (!caching_array) {
pr_debug("Unable to allocate table for new pages\n");
return -ENOMEM;
}
for (i = 0, cpages = 0; i < count; ++i) {
p = alloc_pages(gfp_flags, order);
if (!p) {
pr_debug("Unable to get page %u\n", i);
/* store already allocated pages in the pool after
* setting the caching state */
if (cpages) {
r = ttm_set_pages_caching(caching_array,
cstate, cpages);
if (r)
ttm_handle_caching_failure(caching_array,
cpages);
}
r = -ENOMEM;
goto out;
}
list_add(&p->lru, pages);
#ifdef CONFIG_HIGHMEM
/* gfp flags of highmem page should never be dma32 so we
* we should be fine in such case
*/
if (PageHighMem(p))
continue;
#endif
for (j = 0; j < npages; ++j) {
caching_array[cpages++] = p++;
if (cpages == max_cpages) {
r = ttm_set_pages_caching(caching_array,
cstate, cpages);
if (r) {
ttm_handle_caching_failure(caching_array,
cpages);
goto out;
}
cpages = 0;
}
}
}
if (cpages) {
r = ttm_set_pages_caching(caching_array, cstate, cpages);
if (r)
ttm_handle_caching_failure(caching_array, cpages);
}
out:
kfree(caching_array);
return r;
}
/**
* Fill the given pool if there aren't enough pages and the requested number of
* pages is small.
*/
static void ttm_page_pool_fill_locked(struct ttm_page_pool *pool, int ttm_flags,
enum ttm_caching cstate,
unsigned count, unsigned long *irq_flags)
{
struct page *p;
int r;
unsigned cpages = 0;
/**
* Only allow one pool fill operation at a time.
* If pool doesn't have enough pages for the allocation new pages are
* allocated from outside of pool.
*/
if (pool->fill_lock)
return;
pool->fill_lock = true;
/* If allocation request is small and there are not enough
* pages in a pool we fill the pool up first. */
if (count < _manager->options.small
&& count > pool->npages) {
struct list_head new_pages;
unsigned alloc_size = _manager->options.alloc_size;
/**
* Can't change page caching if in irqsave context. We have to
* drop the pool->lock.
*/
spin_unlock_irqrestore(&pool->lock, *irq_flags);
INIT_LIST_HEAD(&new_pages);
r = ttm_alloc_new_pages(&new_pages, pool->gfp_flags, ttm_flags,
cstate, alloc_size, 0);
spin_lock_irqsave(&pool->lock, *irq_flags);
if (!r) {
list_splice(&new_pages, &pool->list);
++pool->nrefills;
pool->npages += alloc_size;
} else {
pr_debug("Failed to fill pool (%p)\n", pool);
/* If we have any pages left put them to the pool. */
list_for_each_entry(p, &new_pages, lru) {
++cpages;
}
list_splice(&new_pages, &pool->list);
pool->npages += cpages;
}
}
pool->fill_lock = false;
}
/**
* Allocate pages from the pool and put them on the return list.
*
* @return zero for success or negative error code.
*/
static int ttm_page_pool_get_pages(struct ttm_page_pool *pool,
struct list_head *pages,
int ttm_flags,
enum ttm_caching cstate,
unsigned count, unsigned order)
{
unsigned long irq_flags;
struct list_head *p;
unsigned i;
int r = 0;
spin_lock_irqsave(&pool->lock, irq_flags);
if (!order)
ttm_page_pool_fill_locked(pool, ttm_flags, cstate, count,
&irq_flags);
if (count >= pool->npages) {
/* take all pages from the pool */
list_splice_init(&pool->list, pages);
count -= pool->npages;
pool->npages = 0;
goto out;
}
/* find the last pages to include for requested number of pages. Split
* pool to begin and halve it to reduce search space. */
if (count <= pool->npages/2) {
i = 0;
list_for_each(p, &pool->list) {
if (++i == count)
break;
}
} else {
i = pool->npages + 1;
list_for_each_prev(p, &pool->list) {
if (--i == count)
break;
}
}
/* Cut 'count' number of pages from the pool */
list_cut_position(pages, &pool->list, p);
pool->npages -= count;
count = 0;
out:
spin_unlock_irqrestore(&pool->lock, irq_flags);
/* clear the pages coming from the pool if requested */
if (ttm_flags & TTM_PAGE_FLAG_ZERO_ALLOC) {
struct page *page;
list_for_each_entry(page, pages, lru) {
if (PageHighMem(page))
clear_highpage(page);
else
clear_page(page_address(page));
}
}
/* If pool didn't have enough pages allocate new one. */
if (count) {
gfp_t gfp_flags = pool->gfp_flags;
/* set zero flag for page allocation if required */
if (ttm_flags & TTM_PAGE_FLAG_ZERO_ALLOC)
gfp_flags |= __GFP_ZERO;
if (ttm_flags & TTM_PAGE_FLAG_NO_RETRY)
gfp_flags |= __GFP_RETRY_MAYFAIL;
/* ttm_alloc_new_pages doesn't reference pool so we can run
* multiple requests in parallel.
**/
r = ttm_alloc_new_pages(pages, gfp_flags, ttm_flags, cstate,
count, order);
}
return r;
}
/* Put all pages in pages list to correct pool to wait for reuse */
static void ttm_put_pages(struct page **pages, unsigned npages, int flags,
enum ttm_caching cstate)
{
struct ttm_page_pool *pool = ttm_get_pool(flags, false, cstate);
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
struct ttm_page_pool *huge = ttm_get_pool(flags, true, cstate);
#endif
unsigned long irq_flags;
unsigned i;
if (pool == NULL) {
/* No pool for this memory type so free the pages */
i = 0;
while (i < npages) {
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
struct page *p = pages[i];
#endif
unsigned order = 0, j;
if (!pages[i]) {
++i;
continue;
}
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
if (!(flags & TTM_PAGE_FLAG_DMA32) &&
(npages - i) >= HPAGE_PMD_NR) {
for (j = 1; j < HPAGE_PMD_NR; ++j)
if (++p != pages[i + j])
break;
if (j == HPAGE_PMD_NR)
order = HPAGE_PMD_ORDER;
}
#endif
if (page_count(pages[i]) != 1)
pr_err("Erroneous page count. Leaking pages.\n");
__free_pages(pages[i], order);
j = 1 << order;
while (j) {
pages[i++] = NULL;
--j;
}
}
return;
}
i = 0;
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
if (huge) {
unsigned max_size, n2free;
spin_lock_irqsave(&huge->lock, irq_flags);
while ((npages - i) >= HPAGE_PMD_NR) {
struct page *p = pages[i];
unsigned j;
if (!p)
break;
for (j = 1; j < HPAGE_PMD_NR; ++j)
if (++p != pages[i + j])
break;
if (j != HPAGE_PMD_NR)
break;
list_add_tail(&pages[i]->lru, &huge->list);
for (j = 0; j < HPAGE_PMD_NR; ++j)
pages[i++] = NULL;
huge->npages++;
}
/* Check that we don't go over the pool limit */
max_size = _manager->options.max_size;
max_size /= HPAGE_PMD_NR;
if (huge->npages > max_size)
n2free = huge->npages - max_size;
else
n2free = 0;
spin_unlock_irqrestore(&huge->lock, irq_flags);
if (n2free)
ttm_page_pool_free(huge, n2free, false);
}
#endif
spin_lock_irqsave(&pool->lock, irq_flags);
while (i < npages) {
if (pages[i]) {
if (page_count(pages[i]) != 1)
pr_err("Erroneous page count. Leaking pages.\n");
list_add_tail(&pages[i]->lru, &pool->list);
pages[i] = NULL;
pool->npages++;
}
++i;
}
/* Check that we don't go over the pool limit */
npages = 0;
if (pool->npages > _manager->options.max_size) {
npages = pool->npages - _manager->options.max_size;
/* free at least NUM_PAGES_TO_ALLOC number of pages
* to reduce calls to set_memory_wb */
if (npages < NUM_PAGES_TO_ALLOC)
npages = NUM_PAGES_TO_ALLOC;
}
spin_unlock_irqrestore(&pool->lock, irq_flags);
if (npages)
ttm_page_pool_free(pool, npages, false);
}
/*
* On success pages list will hold count number of correctly
* cached pages.
*/
static int ttm_get_pages(struct page **pages, unsigned npages, int flags,
enum ttm_caching cstate)
{
struct ttm_page_pool *pool = ttm_get_pool(flags, false, cstate);
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
struct ttm_page_pool *huge = ttm_get_pool(flags, true, cstate);
#endif
struct list_head plist;
struct page *p = NULL;
unsigned count, first;
int r;
/* No pool for cached pages */
if (pool == NULL) {
gfp_t gfp_flags = GFP_USER;
unsigned i;
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
unsigned j;
#endif
/* set zero flag for page allocation if required */
if (flags & TTM_PAGE_FLAG_ZERO_ALLOC)
gfp_flags |= __GFP_ZERO;
if (flags & TTM_PAGE_FLAG_NO_RETRY)
gfp_flags |= __GFP_RETRY_MAYFAIL;
if (flags & TTM_PAGE_FLAG_DMA32)
gfp_flags |= GFP_DMA32;
else
gfp_flags |= GFP_HIGHUSER;
i = 0;
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
if (!(gfp_flags & GFP_DMA32)) {
while (npages >= HPAGE_PMD_NR) {
gfp_t huge_flags = gfp_flags;
huge_flags |= GFP_TRANSHUGE_LIGHT | __GFP_NORETRY |
__GFP_KSWAPD_RECLAIM;
huge_flags &= ~__GFP_MOVABLE;
huge_flags &= ~__GFP_COMP;
p = alloc_pages(huge_flags, HPAGE_PMD_ORDER);
if (!p)
break;
for (j = 0; j < HPAGE_PMD_NR; ++j)
pages[i++] = p++;
npages -= HPAGE_PMD_NR;
}
}
#endif
first = i;
while (npages) {
p = alloc_page(gfp_flags);
if (!p) {
pr_debug("Unable to allocate page\n");
return -ENOMEM;
}
/* Swap the pages if we detect consecutive order */
if (i > first && pages[i - 1] == p - 1)
swap(p, pages[i - 1]);
pages[i++] = p;
--npages;
}
return 0;
}
count = 0;
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
if (huge && npages >= HPAGE_PMD_NR) {
INIT_LIST_HEAD(&plist);
ttm_page_pool_get_pages(huge, &plist, flags, cstate,
npages / HPAGE_PMD_NR,
HPAGE_PMD_ORDER);
list_for_each_entry(p, &plist, lru) {
unsigned j;
for (j = 0; j < HPAGE_PMD_NR; ++j)
pages[count++] = &p[j];
}
}
#endif
INIT_LIST_HEAD(&plist);
r = ttm_page_pool_get_pages(pool, &plist, flags, cstate,
npages - count, 0);
first = count;
list_for_each_entry(p, &plist, lru) {
struct page *tmp = p;
/* Swap the pages if we detect consecutive order */
if (count > first && pages[count - 1] == tmp - 1)
swap(tmp, pages[count - 1]);
pages[count++] = tmp;
}
if (r) {
/* If there is any pages in the list put them back to
* the pool.
*/
pr_debug("Failed to allocate extra pages for large request\n");
ttm_put_pages(pages, count, flags, cstate);
return r;
}
return 0;
}
static void ttm_page_pool_init_locked(struct ttm_page_pool *pool, gfp_t flags,
char *name, unsigned int order)
{
spin_lock_init(&pool->lock);
pool->fill_lock = false;
INIT_LIST_HEAD(&pool->list);
pool->npages = pool->nfrees = 0;
pool->gfp_flags = flags;
pool->name = name;
pool->order = order;
}
int ttm_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages)
{
int ret;
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
unsigned order = HPAGE_PMD_ORDER;
#else
unsigned order = 0;
#endif
WARN_ON(_manager);
pr_info("Initializing pool allocator\n");
_manager = kzalloc(sizeof(*_manager), GFP_KERNEL);
if (!_manager)
return -ENOMEM;
ttm_page_pool_init_locked(&_manager->wc_pool, GFP_HIGHUSER, "wc", 0);
ttm_page_pool_init_locked(&_manager->uc_pool, GFP_HIGHUSER, "uc", 0);
ttm_page_pool_init_locked(&_manager->wc_pool_dma32,
GFP_USER | GFP_DMA32, "wc dma", 0);
ttm_page_pool_init_locked(&_manager->uc_pool_dma32,
GFP_USER | GFP_DMA32, "uc dma", 0);
ttm_page_pool_init_locked(&_manager->wc_pool_huge,
(GFP_TRANSHUGE_LIGHT | __GFP_NORETRY |
__GFP_KSWAPD_RECLAIM) &
~(__GFP_MOVABLE | __GFP_COMP),
"wc huge", order);
ttm_page_pool_init_locked(&_manager->uc_pool_huge,
(GFP_TRANSHUGE_LIGHT | __GFP_NORETRY |
__GFP_KSWAPD_RECLAIM) &
~(__GFP_MOVABLE | __GFP_COMP)
, "uc huge", order);
_manager->options.max_size = max_pages;
_manager->options.small = SMALL_ALLOCATION;
_manager->options.alloc_size = NUM_PAGES_TO_ALLOC;
ret = kobject_init_and_add(&_manager->kobj, &ttm_pool_kobj_type,
&glob->kobj, "pool");
if (unlikely(ret != 0))
goto error;
ret = ttm_pool_mm_shrink_init(_manager);
if (unlikely(ret != 0))
goto error;
return 0;
error:
kobject_put(&_manager->kobj);
_manager = NULL;
return ret;
}
void ttm_page_alloc_fini(void)
{
int i;
pr_info("Finalizing pool allocator\n");
ttm_pool_mm_shrink_fini(_manager);
/* OK to use static buffer since global mutex is no longer used. */
for (i = 0; i < NUM_POOLS; ++i)
ttm_page_pool_free(&_manager->pools[i], FREE_ALL_PAGES, true);
kobject_put(&_manager->kobj);
_manager = NULL;
}
static void
ttm_pool_unpopulate_helper(struct ttm_tt *ttm, unsigned mem_count_update)
{
struct ttm_mem_global *mem_glob = &ttm_mem_glob;
unsigned i;
if (mem_count_update == 0)
goto put_pages;
for (i = 0; i < mem_count_update; ++i) {
if (!ttm->pages[i])
continue;
ttm_mem_global_free_page(mem_glob, ttm->pages[i], PAGE_SIZE);
}
put_pages:
ttm_put_pages(ttm->pages, ttm->num_pages, ttm->page_flags,
ttm->caching);
}
int ttm_pool_populate(struct ttm_tt *ttm, struct ttm_operation_ctx *ctx)
{
struct ttm_mem_global *mem_glob = &ttm_mem_glob;
unsigned i;
int ret;
if (ttm_tt_is_populated(ttm))
return 0;
if (ttm_check_under_lowerlimit(mem_glob, ttm->num_pages, ctx))
return -ENOMEM;
ret = ttm_get_pages(ttm->pages, ttm->num_pages, ttm->page_flags,
ttm->caching);
if (unlikely(ret != 0)) {
ttm_pool_unpopulate_helper(ttm, 0);
return ret;
}
for (i = 0; i < ttm->num_pages; ++i) {
ret = ttm_mem_global_alloc_page(mem_glob, ttm->pages[i],
PAGE_SIZE, ctx);
if (unlikely(ret != 0)) {
ttm_pool_unpopulate_helper(ttm, i);
return -ENOMEM;
}
}
return 0;
}
EXPORT_SYMBOL(ttm_pool_populate);
void ttm_pool_unpopulate(struct ttm_tt *ttm)
{
ttm_pool_unpopulate_helper(ttm, ttm->num_pages);
}
EXPORT_SYMBOL(ttm_pool_unpopulate);
int ttm_populate_and_map_pages(struct device *dev, struct ttm_tt *tt,
struct ttm_operation_ctx *ctx)
{
unsigned i, j;
int r;
r = ttm_pool_populate(tt, ctx);
if (r)
return r;
for (i = 0; i < tt->num_pages; ++i) {
struct page *p = tt->pages[i];
size_t num_pages = 1;
for (j = i + 1; j < tt->num_pages; ++j) {
if (++p != tt->pages[j])
break;
++num_pages;
}
tt->dma_address[i] = dma_map_page(dev, tt->pages[i],
0, num_pages * PAGE_SIZE,
DMA_BIDIRECTIONAL);
if (dma_mapping_error(dev, tt->dma_address[i])) {
while (i--) {
dma_unmap_page(dev, tt->dma_address[i],
PAGE_SIZE, DMA_BIDIRECTIONAL);
tt->dma_address[i] = 0;
}
ttm_pool_unpopulate(tt);
return -EFAULT;
}
for (j = 1; j < num_pages; ++j) {
tt->dma_address[i + 1] = tt->dma_address[i] + PAGE_SIZE;
++i;
}
}
return 0;
}
EXPORT_SYMBOL(ttm_populate_and_map_pages);
void ttm_unmap_and_unpopulate_pages(struct device *dev, struct ttm_tt *tt)
{
unsigned i, j;
for (i = 0; i < tt->num_pages;) {
struct page *p = tt->pages[i];
size_t num_pages = 1;
if (!tt->dma_address[i] || !tt->pages[i]) {
++i;
continue;
}
for (j = i + 1; j < tt->num_pages; ++j) {
if (++p != tt->pages[j])
break;
++num_pages;
}
dma_unmap_page(dev, tt->dma_address[i], num_pages * PAGE_SIZE,
DMA_BIDIRECTIONAL);
i += num_pages;
}
ttm_pool_unpopulate(tt);
}
EXPORT_SYMBOL(ttm_unmap_and_unpopulate_pages);
int ttm_page_alloc_debugfs(struct seq_file *m, void *data)
{
struct ttm_page_pool *p;
unsigned i;
char *h[] = {"pool", "refills", "pages freed", "size"};
if (!_manager) {
seq_printf(m, "No pool allocator running.\n");
return 0;
}
seq_printf(m, "%7s %12s %13s %8s\n",
h[0], h[1], h[2], h[3]);
for (i = 0; i < NUM_POOLS; ++i) {
p = &_manager->pools[i];
seq_printf(m, "%7s %12ld %13ld %8d\n",
p->name, p->nrefills,
p->nfrees, p->npages);
}
return 0;
}
EXPORT_SYMBOL(ttm_page_alloc_debugfs);
drivers/gpu/drm/ttm/ttm_page_alloc_dma.c deleted 100644 → 0
View file @ fbf1c39c
/*
* Copyright 2011 (c) Oracle Corp.
* 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 AUTHORS OR COPYRIGHT HOLDERS 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.
*
* Author: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
*/
/*
* A simple DMA pool losely based on dmapool.c. It has certain advantages
* over the DMA pools:
* - Pool collects resently freed pages for reuse (and hooks up to
* the shrinker).
* - Tracks currently in use pages
* - Tracks whether the page is UC, WB or cached (and reverts to WB
* when freed).
*/
#define pr_fmt(fmt) "[TTM] " fmt
#include <linux/dma-mapping.h>
#include <linux/list.h>
#include <linux/seq_file.h> /* for seq_printf */
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/highmem.h>
#include <linux/mm_types.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/atomic.h>
#include <linux/device.h>
#include <linux/kthread.h>
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_page_alloc.h>
#include "ttm_set_memory.h"
#define NUM_PAGES_TO_ALLOC (PAGE_SIZE/sizeof(struct page *))
#define SMALL_ALLOCATION 4
#define FREE_ALL_PAGES (~0U)
#define VADDR_FLAG_HUGE_POOL 1UL
#define VADDR_FLAG_UPDATED_COUNT 2UL
enum pool_type {
IS_UNDEFINED = 0,
IS_WC = 1 << 1,
IS_UC = 1 << 2,
IS_CACHED = 1 << 3,
IS_DMA32 = 1 << 4,
IS_HUGE = 1 << 5
};
/*
* The pool structure. There are up to nine pools:
* - generic (not restricted to DMA32):
* - write combined, uncached, cached.
* - dma32 (up to 2^32 - so up 4GB):
* - write combined, uncached, cached.
* - huge (not restricted to DMA32):
* - write combined, uncached, cached.
* for each 'struct device'. The 'cached' is for pages that are actively used.
* The other ones can be shrunk by the shrinker API if neccessary.
* @pools: The 'struct device->dma_pools' link.
* @type: Type of the pool
* @lock: Protects the free_list from concurrnet access. Must be
* used with irqsave/irqrestore variants because pool allocator maybe called
* from delayed work.
* @free_list: Pool of pages that are free to be used. No order requirements.
* @dev: The device that is associated with these pools.
* @size: Size used during DMA allocation.
* @npages_free: Count of available pages for re-use.
* @npages_in_use: Count of pages that are in use.
* @nfrees: Stats when pool is shrinking.
* @nrefills: Stats when the pool is grown.
* @gfp_flags: Flags to pass for alloc_page.
* @name: Name of the pool.
* @dev_name: Name derieved from dev - similar to how dev_info works.
* Used during shutdown as the dev_info during release is unavailable.
*/
struct dma_pool {
struct list_head pools; /* The 'struct device->dma_pools link */
enum pool_type type;
spinlock_t lock;
struct list_head free_list;
struct device *dev;
unsigned size;
unsigned npages_free;
unsigned npages_in_use;
unsigned long nfrees; /* Stats when shrunk. */
unsigned long nrefills; /* Stats when grown. */
gfp_t gfp_flags;
char name[13]; /* "cached dma32" */
char dev_name[64]; /* Constructed from dev */
};
/*
* The accounting page keeping track of the allocated page along with
* the DMA address.
* @page_list: The link to the 'page_list' in 'struct dma_pool'.
* @vaddr: The virtual address of the page and a flag if the page belongs to a
* huge pool
* @dma: The bus address of the page. If the page is not allocated
* via the DMA API, it will be -1.
*/
struct dma_page {
struct list_head page_list;
unsigned long vaddr;
struct page *p;
dma_addr_t dma;
};
/*
* Limits for the pool. They are handled without locks because only place where
* they may change is in sysfs store. They won't have immediate effect anyway
* so forcing serialization to access them is pointless.
*/
struct ttm_pool_opts {
unsigned alloc_size;
unsigned max_size;
unsigned small;
};
/*
* Contains the list of all of the 'struct device' and their corresponding
* DMA pools. Guarded by _mutex->lock.
* @pools: The link to 'struct ttm_pool_manager->pools'
* @dev: The 'struct device' associated with the 'pool'
* @pool: The 'struct dma_pool' associated with the 'dev'
*/
struct device_pools {
struct list_head pools;
struct device *dev;
struct dma_pool *pool;
};
/*
* struct ttm_pool_manager - Holds memory pools for fast allocation
*
* @lock: Lock used when adding/removing from pools
* @pools: List of 'struct device' and 'struct dma_pool' tuples.
* @options: Limits for the pool.
* @npools: Total amount of pools in existence.
* @shrinker: The structure used by [un|]register_shrinker
*/
struct ttm_pool_manager {
struct mutex lock;
struct list_head pools;
struct ttm_pool_opts options;
unsigned npools;
struct shrinker mm_shrink;
struct kobject kobj;
};
static struct ttm_pool_manager *_manager;
static struct attribute ttm_page_pool_max = {
.name = "pool_max_size",
.mode = S_IRUGO | S_IWUSR
};
static struct attribute ttm_page_pool_small = {
.name = "pool_small_allocation",
.mode = S_IRUGO | S_IWUSR
};
static struct attribute ttm_page_pool_alloc_size = {
.name = "pool_allocation_size",
.mode = S_IRUGO | S_IWUSR
};
static struct attribute *ttm_pool_attrs[] = {
&ttm_page_pool_max,
&ttm_page_pool_small,
&ttm_page_pool_alloc_size,
NULL
};
static void ttm_pool_kobj_release(struct kobject *kobj)
{
struct ttm_pool_manager *m =
container_of(kobj, struct ttm_pool_manager, kobj);
kfree(m);
}
static ssize_t ttm_pool_store(struct kobject *kobj, struct attribute *attr,
const char *buffer, size_t size)
{
struct ttm_pool_manager *m =
container_of(kobj, struct ttm_pool_manager, kobj);
int chars;
unsigned val;
chars = sscanf(buffer, "%u", &val);
if (chars == 0)
return size;
/* Convert kb to number of pages */
val = val / (PAGE_SIZE >> 10);
if (attr == &ttm_page_pool_max) {
m->options.max_size = val;
} else if (attr == &ttm_page_pool_small) {
m->options.small = val;
} else if (attr == &ttm_page_pool_alloc_size) {
if (val > NUM_PAGES_TO_ALLOC*8) {
pr_err("Setting allocation size to %lu is not allowed. Recommended size is %lu\n",
NUM_PAGES_TO_ALLOC*(PAGE_SIZE >> 7),
NUM_PAGES_TO_ALLOC*(PAGE_SIZE >> 10));
return size;
} else if (val > NUM_PAGES_TO_ALLOC) {
pr_warn("Setting allocation size to larger than %lu is not recommended\n",
NUM_PAGES_TO_ALLOC*(PAGE_SIZE >> 10));
}
m->options.alloc_size = val;
}
return size;
}
static ssize_t ttm_pool_show(struct kobject *kobj, struct attribute *attr,
char *buffer)
{
struct ttm_pool_manager *m =
container_of(kobj, struct ttm_pool_manager, kobj);
unsigned val = 0;
if (attr == &ttm_page_pool_max)
val = m->options.max_size;
else if (attr == &ttm_page_pool_small)
val = m->options.small;
else if (attr == &ttm_page_pool_alloc_size)
val = m->options.alloc_size;
val = val * (PAGE_SIZE >> 10);
return snprintf(buffer, PAGE_SIZE, "%u\n", val);
}
static const struct sysfs_ops ttm_pool_sysfs_ops = {
.show = &ttm_pool_show,
.store = &ttm_pool_store,
};
static struct kobj_type ttm_pool_kobj_type = {
.release = &ttm_pool_kobj_release,
.sysfs_ops = &ttm_pool_sysfs_ops,
.default_attrs = ttm_pool_attrs,
};
static int ttm_set_pages_caching(struct dma_pool *pool,
struct page **pages, unsigned cpages)
{
int r = 0;
/* Set page caching */
if (pool->type & IS_UC) {
r = ttm_set_pages_array_uc(pages, cpages);
if (r)
pr_err("%s: Failed to set %d pages to uc!\n",
pool->dev_name, cpages);
}
if (pool->type & IS_WC) {
r = ttm_set_pages_array_wc(pages, cpages);
if (r)
pr_err("%s: Failed to set %d pages to wc!\n",
pool->dev_name, cpages);
}
return r;
}
static void __ttm_dma_free_page(struct dma_pool *pool, struct dma_page *d_page)
{
unsigned long attrs = 0;
dma_addr_t dma = d_page->dma;
d_page->vaddr &= ~VADDR_FLAG_HUGE_POOL;
if (pool->type & IS_HUGE)
attrs = DMA_ATTR_NO_WARN;
dma_free_attrs(pool->dev, pool->size, (void *)d_page->vaddr, dma, attrs);
kfree(d_page);
d_page = NULL;
}
static struct dma_page *__ttm_dma_alloc_page(struct dma_pool *pool)
{
struct dma_page *d_page;
unsigned long attrs = 0;
void *vaddr;
d_page = kmalloc(sizeof(struct dma_page), GFP_KERNEL);
if (!d_page)
return NULL;
if (pool->type & IS_HUGE)
attrs = DMA_ATTR_NO_WARN;
vaddr = dma_alloc_attrs(pool->dev, pool->size, &d_page->dma,
pool->gfp_flags, attrs);
if (vaddr) {
if (is_vmalloc_addr(vaddr))
d_page->p = vmalloc_to_page(vaddr);
else
d_page->p = virt_to_page(vaddr);
d_page->vaddr = (unsigned long)vaddr;
if (pool->type & IS_HUGE)
d_page->vaddr |= VADDR_FLAG_HUGE_POOL;
} else {
kfree(d_page);
d_page = NULL;
}
return d_page;
}
static enum pool_type ttm_to_type(int flags, enum ttm_caching cstate)
{
enum pool_type type = IS_UNDEFINED;
if (flags & TTM_PAGE_FLAG_DMA32)
type |= IS_DMA32;
if (cstate == ttm_cached)
type |= IS_CACHED;
else if (cstate == ttm_uncached)
type |= IS_UC;
else
type |= IS_WC;
return type;
}
static void ttm_pool_update_free_locked(struct dma_pool *pool,
unsigned freed_pages)
{
pool->npages_free -= freed_pages;
pool->nfrees += freed_pages;
}
/* set memory back to wb and free the pages. */
static void ttm_dma_page_put(struct dma_pool *pool, struct dma_page *d_page)
{
struct page *page = d_page->p;
unsigned num_pages;
/* Don't set WB on WB page pool. */
if (!(pool->type & IS_CACHED)) {
num_pages = pool->size / PAGE_SIZE;
if (ttm_set_pages_wb(page, num_pages))
pr_err("%s: Failed to set %d pages to wb!\n",
pool->dev_name, num_pages);
}
list_del(&d_page->page_list);
__ttm_dma_free_page(pool, d_page);
}
static void ttm_dma_pages_put(struct dma_pool *pool, struct list_head *d_pages,
struct page *pages[], unsigned npages)
{
struct dma_page *d_page, *tmp;
if (pool->type & IS_HUGE) {
list_for_each_entry_safe(d_page, tmp, d_pages, page_list)
ttm_dma_page_put(pool, d_page);
return;
}
/* Don't set WB on WB page pool. */
if (npages && !(pool->type & IS_CACHED) &&
ttm_set_pages_array_wb(pages, npages))
pr_err("%s: Failed to set %d pages to wb!\n",
pool->dev_name, npages);
list_for_each_entry_safe(d_page, tmp, d_pages, page_list) {
list_del(&d_page->page_list);
__ttm_dma_free_page(pool, d_page);
}
}
/*
* Free pages from pool.
*
* To prevent hogging the ttm_swap process we only free NUM_PAGES_TO_ALLOC
* number of pages in one go.
*
* @pool: to free the pages from
* @nr_free: If set to true will free all pages in pool
* @use_static: Safe to use static buffer
**/
static unsigned ttm_dma_page_pool_free(struct dma_pool *pool, unsigned nr_free,
bool use_static)
{
static struct page *static_buf[NUM_PAGES_TO_ALLOC];
unsigned long irq_flags;
struct dma_page *dma_p, *tmp;
struct page **pages_to_free;
struct list_head d_pages;
unsigned freed_pages = 0,
npages_to_free = nr_free;
if (NUM_PAGES_TO_ALLOC < nr_free)
npages_to_free = NUM_PAGES_TO_ALLOC;
if (use_static)
pages_to_free = static_buf;
else
pages_to_free = kmalloc_array(npages_to_free,
sizeof(struct page *),
GFP_KERNEL);
if (!pages_to_free) {
pr_debug("%s: Failed to allocate memory for pool free operation\n",
pool->dev_name);
return 0;
}
INIT_LIST_HEAD(&d_pages);
restart:
spin_lock_irqsave(&pool->lock, irq_flags);
/* We picking the oldest ones off the list */
list_for_each_entry_safe_reverse(dma_p, tmp, &pool->free_list,
page_list) {
if (freed_pages >= npages_to_free)
break;
/* Move the dma_page from one list to another. */
list_move(&dma_p->page_list, &d_pages);
pages_to_free[freed_pages++] = dma_p->p;
/* We can only remove NUM_PAGES_TO_ALLOC at a time. */
if (freed_pages >= NUM_PAGES_TO_ALLOC) {
ttm_pool_update_free_locked(pool, freed_pages);
/**
* Because changing page caching is costly
* we unlock the pool to prevent stalling.
*/
spin_unlock_irqrestore(&pool->lock, irq_flags);
ttm_dma_pages_put(pool, &d_pages, pages_to_free,
freed_pages);
INIT_LIST_HEAD(&d_pages);
if (likely(nr_free != FREE_ALL_PAGES))
nr_free -= freed_pages;
if (NUM_PAGES_TO_ALLOC >= nr_free)
npages_to_free = nr_free;
else
npages_to_free = NUM_PAGES_TO_ALLOC;
freed_pages = 0;
/* free all so restart the processing */
if (nr_free)
goto restart;
/* Not allowed to fall through or break because
* following context is inside spinlock while we are
* outside here.
*/
goto out;
}
}
/* remove range of pages from the pool */
if (freed_pages) {
ttm_pool_update_free_locked(pool, freed_pages);
nr_free -= freed_pages;
}
spin_unlock_irqrestore(&pool->lock, irq_flags);
if (freed_pages)
ttm_dma_pages_put(pool, &d_pages, pages_to_free, freed_pages);
out:
if (pages_to_free != static_buf)
kfree(pages_to_free);
return nr_free;
}
static void ttm_dma_free_pool(struct device *dev, enum pool_type type)
{
struct device_pools *p;
struct dma_pool *pool;
if (!dev)
return;
mutex_lock(&_manager->lock);
list_for_each_entry_reverse(p, &_manager->pools, pools) {
if (p->dev != dev)
continue;
pool = p->pool;
if (pool->type != type)
continue;
list_del(&p->pools);
kfree(p);
_manager->npools--;
break;
}
list_for_each_entry_reverse(pool, &dev->dma_pools, pools) {
if (pool->type != type)
continue;
/* Takes a spinlock.. */
/* OK to use static buffer since global mutex is held. */
ttm_dma_page_pool_free(pool, FREE_ALL_PAGES, true);
WARN_ON(((pool->npages_in_use + pool->npages_free) != 0));
/* This code path is called after _all_ references to the
* struct device has been dropped - so nobody should be
* touching it. In case somebody is trying to _add_ we are
* guarded by the mutex. */
list_del(&pool->pools);
kfree(pool);
break;
}
mutex_unlock(&_manager->lock);
}
/*
* On free-ing of the 'struct device' this deconstructor is run.
* Albeit the pool might have already been freed earlier.
*/
static void ttm_dma_pool_release(struct device *dev, void *res)
{
struct dma_pool *pool = *(struct dma_pool **)res;
if (pool)
ttm_dma_free_pool(dev, pool->type);
}
static int ttm_dma_pool_match(struct device *dev, void *res, void *match_data)
{
return *(struct dma_pool **)res == match_data;
}
static struct dma_pool *ttm_dma_pool_init(struct device *dev, gfp_t flags,
enum pool_type type)
{
const char *n[] = {"wc", "uc", "cached", " dma32", "huge"};
enum pool_type t[] = {IS_WC, IS_UC, IS_CACHED, IS_DMA32, IS_HUGE};
struct device_pools *sec_pool = NULL;
struct dma_pool *pool = NULL, **ptr;
unsigned i;
int ret = -ENODEV;
char *p;
if (!dev)
return NULL;
ptr = devres_alloc(ttm_dma_pool_release, sizeof(*ptr), GFP_KERNEL);
if (!ptr)
return NULL;
ret = -ENOMEM;
pool = kmalloc_node(sizeof(struct dma_pool), GFP_KERNEL,
dev_to_node(dev));
if (!pool)
goto err_mem;
sec_pool = kmalloc_node(sizeof(struct device_pools), GFP_KERNEL,
dev_to_node(dev));
if (!sec_pool)
goto err_mem;
INIT_LIST_HEAD(&sec_pool->pools);
sec_pool->dev = dev;
sec_pool->pool = pool;
INIT_LIST_HEAD(&pool->free_list);
INIT_LIST_HEAD(&pool->pools);
spin_lock_init(&pool->lock);
pool->dev = dev;
pool->npages_free = pool->npages_in_use = 0;
pool->nfrees = 0;
pool->gfp_flags = flags;
if (type & IS_HUGE)
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
pool->size = HPAGE_PMD_SIZE;
#else
BUG();
#endif
else
pool->size = PAGE_SIZE;
pool->type = type;
pool->nrefills = 0;
p = pool->name;
for (i = 0; i < ARRAY_SIZE(t); i++) {
if (type & t[i]) {
p += scnprintf(p, sizeof(pool->name) - (p - pool->name),
"%s", n[i]);
}
}
*p = 0;
/* We copy the name for pr_ calls b/c when dma_pool_destroy is called
* - the kobj->name has already been deallocated.*/
snprintf(pool->dev_name, sizeof(pool->dev_name), "%s %s",
dev_driver_string(dev), dev_name(dev));
mutex_lock(&_manager->lock);
/* You can get the dma_pool from either the global: */
list_add(&sec_pool->pools, &_manager->pools);
_manager->npools++;
/* or from 'struct device': */
list_add(&pool->pools, &dev->dma_pools);
mutex_unlock(&_manager->lock);
*ptr = pool;
devres_add(dev, ptr);
return pool;
err_mem:
devres_free(ptr);
kfree(sec_pool);
kfree(pool);
return ERR_PTR(ret);
}
static struct dma_pool *ttm_dma_find_pool(struct device *dev,
enum pool_type type)
{
struct dma_pool *pool, *tmp;
if (type == IS_UNDEFINED)
return NULL;
/* NB: We iterate on the 'struct dev' which has no spinlock, but
* it does have a kref which we have taken. The kref is taken during
* graphic driver loading - in the drm_pci_init it calls either
* pci_dev_get or pci_register_driver which both end up taking a kref
* on 'struct device'.
*
* On teardown, the graphic drivers end up quiescing the TTM (put_pages)
* and calls the dev_res deconstructors: ttm_dma_pool_release. The nice
* thing is at that point of time there are no pages associated with the
* driver so this function will not be called.
*/
list_for_each_entry_safe(pool, tmp, &dev->dma_pools, pools)
if (pool->type == type)
return pool;
return NULL;
}
/*
* Free pages the pages that failed to change the caching state. If there
* are pages that have changed their caching state already put them to the
* pool.
*/
static void ttm_dma_handle_caching_failure(struct dma_pool *pool,
struct list_head *d_pages,
struct page **failed_pages,
unsigned cpages)
{
struct dma_page *d_page, *tmp;
struct page *p;
unsigned i = 0;
p = failed_pages[0];
if (!p)
return;
/* Find the failed page. */
list_for_each_entry_safe(d_page, tmp, d_pages, page_list) {
if (d_page->p != p)
continue;
/* .. and then progress over the full list. */
list_del(&d_page->page_list);
__ttm_dma_free_page(pool, d_page);
if (++i < cpages)
p = failed_pages[i];
else
break;
}
}
/*
* Allocate 'count' pages, and put 'need' number of them on the
* 'pages' and as well on the 'dma_address' starting at 'dma_offset' offset.
* The full list of pages should also be on 'd_pages'.
* We return zero for success, and negative numbers as errors.
*/
static int ttm_dma_pool_alloc_new_pages(struct dma_pool *pool,
struct list_head *d_pages,
unsigned count)
{
struct page **caching_array;
struct dma_page *dma_p;
struct page *p;
int r = 0;
unsigned i, j, npages, cpages;
unsigned max_cpages = min(count,
(unsigned)(PAGE_SIZE/sizeof(struct page *)));
/* allocate array for page caching change */
caching_array = kmalloc_array(max_cpages, sizeof(struct page *),
GFP_KERNEL);
if (!caching_array) {
pr_debug("%s: Unable to allocate table for new pages\n",
pool->dev_name);
return -ENOMEM;
}
if (count > 1)
pr_debug("%s: (%s:%d) Getting %d pages\n",
pool->dev_name, pool->name, current->pid, count);
for (i = 0, cpages = 0; i < count; ++i) {
dma_p = __ttm_dma_alloc_page(pool);
if (!dma_p) {
pr_debug("%s: Unable to get page %u\n",
pool->dev_name, i);
/* store already allocated pages in the pool after
* setting the caching state */
if (cpages) {
r = ttm_set_pages_caching(pool, caching_array,
cpages);
if (r)
ttm_dma_handle_caching_failure(
pool, d_pages, caching_array,
cpages);
}
r = -ENOMEM;
goto out;
}
p = dma_p->p;
list_add(&dma_p->page_list, d_pages);
#ifdef CONFIG_HIGHMEM
/* gfp flags of highmem page should never be dma32 so we
* we should be fine in such case
*/
if (PageHighMem(p))
continue;
#endif
npages = pool->size / PAGE_SIZE;
for (j = 0; j < npages; ++j) {
caching_array[cpages++] = p + j;
if (cpages == max_cpages) {
/* Note: Cannot hold the spinlock */
r = ttm_set_pages_caching(pool, caching_array,
cpages);
if (r) {
ttm_dma_handle_caching_failure(
pool, d_pages, caching_array,
cpages);
goto out;
}
cpages = 0;
}
}
}
if (cpages) {
r = ttm_set_pages_caching(pool, caching_array, cpages);
if (r)
ttm_dma_handle_caching_failure(pool, d_pages,
caching_array, cpages);
}
out:
kfree(caching_array);
return r;
}
/*
* @return count of pages still required to fulfill the request.
*/
static int ttm_dma_page_pool_fill_locked(struct dma_pool *pool,
unsigned long *irq_flags)
{
unsigned count = _manager->options.small;
int r = pool->npages_free;
if (count > pool->npages_free) {
struct list_head d_pages;
INIT_LIST_HEAD(&d_pages);
spin_unlock_irqrestore(&pool->lock, *irq_flags);
/* Returns how many more are neccessary to fulfill the
* request. */
r = ttm_dma_pool_alloc_new_pages(pool, &d_pages, count);
spin_lock_irqsave(&pool->lock, *irq_flags);
if (!r) {
/* Add the fresh to the end.. */
list_splice(&d_pages, &pool->free_list);
++pool->nrefills;
pool->npages_free += count;
r = count;
} else {
struct dma_page *d_page;
unsigned cpages = 0;
pr_debug("%s: Failed to fill %s pool (r:%d)!\n",
pool->dev_name, pool->name, r);
list_for_each_entry(d_page, &d_pages, page_list) {
cpages++;
}
list_splice_tail(&d_pages, &pool->free_list);
pool->npages_free += cpages;
r = cpages;
}
}
return r;
}
/*
* The populate list is actually a stack (not that is matters as TTM
* allocates one page at a time.
* return dma_page pointer if success, otherwise NULL.
*/
static struct dma_page *ttm_dma_pool_get_pages(struct dma_pool *pool,
struct ttm_tt *ttm,
unsigned index)
{
struct dma_page *d_page = NULL;
unsigned long irq_flags;
int count;
spin_lock_irqsave(&pool->lock, irq_flags);
count = ttm_dma_page_pool_fill_locked(pool, &irq_flags);
if (count) {
d_page = list_first_entry(&pool->free_list, struct dma_page, page_list);
ttm->pages[index] = d_page->p;
ttm->dma_address[index] = d_page->dma;
list_move_tail(&d_page->page_list, &ttm->pages_list);
pool->npages_in_use += 1;
pool->npages_free -= 1;
}
spin_unlock_irqrestore(&pool->lock, irq_flags);
return d_page;
}
static gfp_t ttm_dma_pool_gfp_flags(struct ttm_tt *ttm, bool huge)
{
gfp_t gfp_flags;
if (ttm->page_flags & TTM_PAGE_FLAG_DMA32)
gfp_flags = GFP_USER | GFP_DMA32;
else
gfp_flags = GFP_HIGHUSER;
if (ttm->page_flags & TTM_PAGE_FLAG_ZERO_ALLOC)
gfp_flags |= __GFP_ZERO;
if (huge) {
gfp_flags |= GFP_TRANSHUGE_LIGHT | __GFP_NORETRY |
__GFP_KSWAPD_RECLAIM;
gfp_flags &= ~__GFP_MOVABLE;
gfp_flags &= ~__GFP_COMP;
}
if (ttm->page_flags & TTM_PAGE_FLAG_NO_RETRY)
gfp_flags |= __GFP_RETRY_MAYFAIL;
return gfp_flags;
}
/*
* On success pages list will hold count number of correctly
* cached pages. On failure will hold the negative return value (-ENOMEM, etc).
*/
int ttm_dma_populate(struct ttm_tt *ttm, struct device *dev,
struct ttm_operation_ctx *ctx)
{
struct ttm_mem_global *mem_glob = &ttm_mem_glob;
unsigned long num_pages = ttm->num_pages;
struct dma_pool *pool;
struct dma_page *d_page;
enum pool_type type;
unsigned i;
int ret;
if (ttm_tt_is_populated(ttm))
return 0;
if (ttm_check_under_lowerlimit(mem_glob, num_pages, ctx))
return -ENOMEM;
INIT_LIST_HEAD(&ttm->pages_list);
i = 0;
type = ttm_to_type(ttm->page_flags, ttm->caching);
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
if (ttm->page_flags & TTM_PAGE_FLAG_DMA32)
goto skip_huge;
pool = ttm_dma_find_pool(dev, type | IS_HUGE);
if (!pool) {
gfp_t gfp_flags = ttm_dma_pool_gfp_flags(ttm, true);
pool = ttm_dma_pool_init(dev, gfp_flags, type | IS_HUGE);
if (IS_ERR_OR_NULL(pool))
goto skip_huge;
}
while (num_pages >= HPAGE_PMD_NR) {
unsigned j;
d_page = ttm_dma_pool_get_pages(pool, ttm, i);
if (!d_page)
break;
ret = ttm_mem_global_alloc_page(mem_glob, ttm->pages[i],
pool->size, ctx);
if (unlikely(ret != 0)) {
ttm_dma_unpopulate(ttm, dev);
return -ENOMEM;
}
d_page->vaddr |= VADDR_FLAG_UPDATED_COUNT;
for (j = i + 1; j < (i + HPAGE_PMD_NR); ++j) {
ttm->pages[j] = ttm->pages[j - 1] + 1;
ttm->dma_address[j] = ttm->dma_address[j - 1] +
PAGE_SIZE;
}
i += HPAGE_PMD_NR;
num_pages -= HPAGE_PMD_NR;
}
skip_huge:
#endif
pool = ttm_dma_find_pool(dev, type);
if (!pool) {
gfp_t gfp_flags = ttm_dma_pool_gfp_flags(ttm, false);
pool = ttm_dma_pool_init(dev, gfp_flags, type);
if (IS_ERR_OR_NULL(pool))
return -ENOMEM;
}
while (num_pages) {
d_page = ttm_dma_pool_get_pages(pool, ttm, i);
if (!d_page) {
ttm_dma_unpopulate(ttm, dev);
return -ENOMEM;
}
ret = ttm_mem_global_alloc_page(mem_glob, ttm->pages[i],
pool->size, ctx);
if (unlikely(ret != 0)) {
ttm_dma_unpopulate(ttm, dev);
return -ENOMEM;
}
d_page->vaddr |= VADDR_FLAG_UPDATED_COUNT;
++i;
--num_pages;
}
return 0;
}
EXPORT_SYMBOL_GPL(ttm_dma_populate);
/* Put all pages in pages list to correct pool to wait for reuse */
void ttm_dma_unpopulate(struct ttm_tt *ttm, struct device *dev)
{
struct ttm_mem_global *mem_glob = &ttm_mem_glob;
struct dma_pool *pool;
struct dma_page *d_page, *next;
enum pool_type type;
bool is_cached = false;
unsigned count, i, npages = 0;
unsigned long irq_flags;
type = ttm_to_type(ttm->page_flags, ttm->caching);
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
pool = ttm_dma_find_pool(dev, type | IS_HUGE);
if (pool) {
count = 0;
list_for_each_entry_safe(d_page, next, &ttm->pages_list,
page_list) {
if (!(d_page->vaddr & VADDR_FLAG_HUGE_POOL))
continue;
count++;
if (d_page->vaddr & VADDR_FLAG_UPDATED_COUNT) {
ttm_mem_global_free_page(mem_glob, d_page->p,
pool->size);
d_page->vaddr &= ~VADDR_FLAG_UPDATED_COUNT;
}
ttm_dma_page_put(pool, d_page);
}
spin_lock_irqsave(&pool->lock, irq_flags);
pool->npages_in_use -= count;
pool->nfrees += count;
spin_unlock_irqrestore(&pool->lock, irq_flags);
}
#endif
pool = ttm_dma_find_pool(dev, type);
if (!pool)
return;
is_cached = (ttm_dma_find_pool(pool->dev,
ttm_to_type(ttm->page_flags, ttm_cached)) == pool);
/* make sure pages array match list and count number of pages */
count = 0;
list_for_each_entry_safe(d_page, next, &ttm->pages_list,
page_list) {
ttm->pages[count] = d_page->p;
count++;
if (d_page->vaddr & VADDR_FLAG_UPDATED_COUNT) {
ttm_mem_global_free_page(mem_glob, d_page->p,
pool->size);
d_page->vaddr &= ~VADDR_FLAG_UPDATED_COUNT;
}
if (is_cached)
ttm_dma_page_put(pool, d_page);
}
spin_lock_irqsave(&pool->lock, irq_flags);
pool->npages_in_use -= count;
if (is_cached) {
pool->nfrees += count;
} else {
pool->npages_free += count;
list_splice(&ttm->pages_list, &pool->free_list);
/*
* Wait to have at at least NUM_PAGES_TO_ALLOC number of pages
* to free in order to minimize calls to set_memory_wb().
*/
if (pool->npages_free >= (_manager->options.max_size +
NUM_PAGES_TO_ALLOC))
npages = pool->npages_free - _manager->options.max_size;
}
spin_unlock_irqrestore(&pool->lock, irq_flags);
INIT_LIST_HEAD(&ttm->pages_list);
for (i = 0; i < ttm->num_pages; i++) {
ttm->pages[i] = NULL;
ttm->dma_address[i] = 0;
}
/* shrink pool if necessary (only on !is_cached pools)*/
if (npages)
ttm_dma_page_pool_free(pool, npages, false);
}
EXPORT_SYMBOL_GPL(ttm_dma_unpopulate);
/**
* Callback for mm to request pool to reduce number of page held.
*
* XXX: (dchinner) Deadlock warning!
*
* I'm getting sadder as I hear more pathetical whimpers about needing per-pool
* shrinkers
*/
static unsigned long
ttm_dma_pool_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
{
static unsigned start_pool;
unsigned idx = 0;
unsigned pool_offset;
unsigned shrink_pages = sc->nr_to_scan;
struct device_pools *p;
unsigned long freed = 0;
if (list_empty(&_manager->pools))
return SHRINK_STOP;
if (!mutex_trylock(&_manager->lock))
return SHRINK_STOP;
if (!_manager->npools)
goto out;
pool_offset = ++start_pool % _manager->npools;
list_for_each_entry(p, &_manager->pools, pools) {
unsigned nr_free;
if (!p->dev)
continue;
if (shrink_pages == 0)
break;
/* Do it in round-robin fashion. */
if (++idx < pool_offset)
continue;
nr_free = shrink_pages;
/* OK to use static buffer since global mutex is held. */
shrink_pages = ttm_dma_page_pool_free(p->pool, nr_free, true);
freed += nr_free - shrink_pages;
pr_debug("%s: (%s:%d) Asked to shrink %d, have %d more to go\n",
p->pool->dev_name, p->pool->name, current->pid,
nr_free, shrink_pages);
}
out:
mutex_unlock(&_manager->lock);
return freed;
}
static unsigned long
ttm_dma_pool_shrink_count(struct shrinker *shrink, struct shrink_control *sc)
{
struct device_pools *p;
unsigned long count = 0;
if (!mutex_trylock(&_manager->lock))
return 0;
list_for_each_entry(p, &_manager->pools, pools)
count += p->pool->npages_free;
mutex_unlock(&_manager->lock);
return count;
}
static int ttm_dma_pool_mm_shrink_init(struct ttm_pool_manager *manager)
{
manager->mm_shrink.count_objects = ttm_dma_pool_shrink_count;
manager->mm_shrink.scan_objects = &ttm_dma_pool_shrink_scan;
manager->mm_shrink.seeks = 1;
return register_shrinker(&manager->mm_shrink);
}
static void ttm_dma_pool_mm_shrink_fini(struct ttm_pool_manager *manager)
{
unregister_shrinker(&manager->mm_shrink);
}
int ttm_dma_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages)
{
int ret;
WARN_ON(_manager);
pr_info("Initializing DMA pool allocator\n");
_manager = kzalloc(sizeof(*_manager), GFP_KERNEL);
if (!_manager)
return -ENOMEM;
mutex_init(&_manager->lock);
INIT_LIST_HEAD(&_manager->pools);
_manager->options.max_size = max_pages;
_manager->options.small = SMALL_ALLOCATION;
_manager->options.alloc_size = NUM_PAGES_TO_ALLOC;
/* This takes care of auto-freeing the _manager */
ret = kobject_init_and_add(&_manager->kobj, &ttm_pool_kobj_type,
&glob->kobj, "dma_pool");
if (unlikely(ret != 0))
goto error;
ret = ttm_dma_pool_mm_shrink_init(_manager);
if (unlikely(ret != 0))
goto error;
return 0;
error:
kobject_put(&_manager->kobj);
_manager = NULL;
return ret;
}
void ttm_dma_page_alloc_fini(void)
{
struct device_pools *p, *t;
pr_info("Finalizing DMA pool allocator\n");
ttm_dma_pool_mm_shrink_fini(_manager);
list_for_each_entry_safe_reverse(p, t, &_manager->pools, pools) {
dev_dbg(p->dev, "(%s:%d) Freeing.\n", p->pool->name,
current->pid);
WARN_ON(devres_destroy(p->dev, ttm_dma_pool_release,
ttm_dma_pool_match, p->pool));
ttm_dma_free_pool(p->dev, p->pool->type);
}
kobject_put(&_manager->kobj);
_manager = NULL;
}
int ttm_dma_page_alloc_debugfs(struct seq_file *m, void *data)
{
struct device_pools *p;
struct dma_pool *pool = NULL;
if (!_manager) {
seq_printf(m, "No pool allocator running.\n");
return 0;
}
seq_printf(m, " pool refills pages freed inuse available name\n");
mutex_lock(&_manager->lock);
list_for_each_entry(p, &_manager->pools, pools) {
struct device *dev = p->dev;
if (!dev)
continue;
pool = p->pool;
seq_printf(m, "%13s %12ld %13ld %8d %8d %8s\n",
pool->name, pool->nrefills,
pool->nfrees, pool->npages_in_use,
pool->npages_free,
pool->dev_name);
}
mutex_unlock(&_manager->lock);
return 0;
}
EXPORT_SYMBOL_GPL(ttm_dma_page_alloc_debugfs);
drivers/gpu/drm/ttm/ttm_set_memory.h deleted 100644 → 0
View file @ fbf1c39c
/**************************************************************************
*
* Copyright (c) 2018 Advanced Micro Devices, Inc.
* 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: Huang Rui <ray.huang@amd.com>
*/
#ifndef TTM_SET_MEMORY
#define TTM_SET_MEMORY
#include <linux/mm.h>
#ifdef CONFIG_X86
#include <asm/set_memory.h>
static inline int ttm_set_pages_array_wb(struct page **pages, int addrinarray)
{
return set_pages_array_wb(pages, addrinarray);
}
static inline int ttm_set_pages_array_wc(struct page **pages, int addrinarray)
{
return set_pages_array_wc(pages, addrinarray);
}
static inline int ttm_set_pages_array_uc(struct page **pages, int addrinarray)
{
return set_pages_array_uc(pages, addrinarray);
}
static inline int ttm_set_pages_wb(struct page *page, int numpages)
{
return set_pages_wb(page, numpages);
}
#else /* for CONFIG_X86 */
static inline int ttm_set_pages_array_wb(struct page **pages, int addrinarray)
{
return 0;
}
static inline int ttm_set_pages_array_wc(struct page **pages, int addrinarray)
{
return 0;
}
static inline int ttm_set_pages_array_uc(struct page **pages, int addrinarray)
{
return 0;
}
static inline int ttm_set_pages_wb(struct page *page, int numpages)
{
return 0;
}
#endif /* for CONFIG_X86 */
#endif
drivers/gpu/drm/ttm/ttm_tt.c
View file @ 256dd44b
......@@ -51,9 +51,6 @@ int ttm_tt_create(struct ttm_buffer_object *bo, bool zero_alloc)
if (bo->ttm)
return 0;
if (bdev->need_dma32)
page_flags |= TTM_PAGE_FLAG_DMA32;
if (bdev->no_retry)
page_flags |= TTM_PAGE_FLAG_NO_RETRY;
......@@ -141,7 +138,6 @@ static void ttm_tt_init_fields(struct ttm_tt *ttm,
ttm->dma_address = NULL;
ttm->swap_storage = NULL;
ttm->sg = bo->sg;
INIT_LIST_HEAD(&ttm->pages_list);
ttm->caching = caching;
}
......
include/drm/ttm/ttm_bo_driver.h
View file @ 256dd44b
......@@ -315,8 +315,6 @@ struct ttm_bo_device {
struct delayed_work wq;
bool need_dma32;
bool no_retry;
};
......
include/drm/ttm/ttm_page_alloc.h deleted 100644 → 0
View file @ fbf1c39c
/*
* Copyright (c) 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 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 AUTHORS OR COPYRIGHT HOLDERS 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 <airlied@redhat.com>
* Jerome Glisse <jglisse@redhat.com>
*/
#ifndef TTM_PAGE_ALLOC
#define TTM_PAGE_ALLOC
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_memory.h>
struct device;
/**
* Initialize pool allocator.
*/
int ttm_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages);
/**
* Free pool allocator.
*/
void ttm_page_alloc_fini(void);
/**
* ttm_pool_populate:
*
* @ttm: The struct ttm_tt to contain the backing pages.
*
* Add backing pages to all of @ttm
*/
int ttm_pool_populate(struct ttm_tt *ttm, struct ttm_operation_ctx *ctx);
/**
* ttm_pool_unpopulate:
*
* @ttm: The struct ttm_tt which to free backing pages.
*
* Free all pages of @ttm
*/
void ttm_pool_unpopulate(struct ttm_tt *ttm);
/**
* Populates and DMA maps pages to fullfil a ttm_dma_populate() request
*/
int ttm_populate_and_map_pages(struct device *dev, struct ttm_tt *tt,
struct ttm_operation_ctx *ctx);
/**
* Unpopulates and DMA unmaps pages as part of a
* ttm_dma_unpopulate() request */
void ttm_unmap_and_unpopulate_pages(struct device *dev, struct ttm_tt *tt);
/**
* Output the state of pools to debugfs file
*/
int ttm_page_alloc_debugfs(struct seq_file *m, void *data);
#if defined(CONFIG_DRM_TTM_DMA_PAGE_POOL)
/**
* Initialize pool allocator.
*/
int ttm_dma_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages);
/**
* Free pool allocator.
*/
void ttm_dma_page_alloc_fini(void);
/**
* Output the state of pools to debugfs file
*/
int ttm_dma_page_alloc_debugfs(struct seq_file *m, void *data);
int ttm_dma_populate(struct ttm_tt *ttm_dma, struct device *dev,
struct ttm_operation_ctx *ctx);
void ttm_dma_unpopulate(struct ttm_tt *ttm_dma, struct device *dev);
#else
static inline int ttm_dma_page_alloc_init(struct ttm_mem_global *glob,
unsigned max_pages)
{
return -ENODEV;
}
static inline void ttm_dma_page_alloc_fini(void) { return; }
static inline int ttm_dma_page_alloc_debugfs(struct seq_file *m, void *data)
{
return 0;
}
static inline int ttm_dma_populate(struct ttm_tt *ttm_dma,
struct device *dev,
struct ttm_operation_ctx *ctx)
{
return -ENOMEM;
}
static inline void ttm_dma_unpopulate(struct ttm_tt *ttm_dma,
struct device *dev)
{
}
#endif
#endif
include/drm/ttm/ttm_tt.h
View file @ 256dd44b
......@@ -37,7 +37,6 @@ struct ttm_operation_ctx;
#define TTM_PAGE_FLAG_SWAPPED (1 << 4)
#define TTM_PAGE_FLAG_ZERO_ALLOC (1 << 6)
#define TTM_PAGE_FLAG_DMA32 (1 << 7)
#define TTM_PAGE_FLAG_SG (1 << 8)
#define TTM_PAGE_FLAG_NO_RETRY (1 << 9)
......@@ -66,7 +65,6 @@ struct ttm_tt {
struct sg_table *sg;
dma_addr_t *dma_address;
struct file *swap_storage;
struct list_head pages_list;
enum ttm_caching caching;
};
......
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