[PATCH 9/9] drm/ttm: nuke old page allocator
Christian König
ckoenig.leichtzumerken at gmail.com
Mon Oct 26 17:41:17 UTC 2020
Not used any more.
Signed-off-by: Christian König <christian.koenig at amd.com>
---
drivers/gpu/drm/Kconfig | 7 -
drivers/gpu/drm/ttm/Makefile | 3 +-
drivers/gpu/drm/ttm/ttm_agp_backend.c | 1 -
drivers/gpu/drm/ttm/ttm_bo.c | 1 -
drivers/gpu/drm/ttm/ttm_memory.c | 5 -
drivers/gpu/drm/ttm/ttm_page_alloc.c | 1176 ---------------------
drivers/gpu/drm/ttm/ttm_page_alloc_dma.c | 1226 ----------------------
drivers/gpu/drm/ttm/ttm_set_memory.h | 84 --
drivers/gpu/drm/ttm/ttm_tt.c | 4 -
include/drm/ttm/ttm_bo_driver.h | 2 -
include/drm/ttm/ttm_page_alloc.h | 122 ---
include/drm/ttm/ttm_tt.h | 2 -
12 files changed, 1 insertion(+), 2632 deletions(-)
delete mode 100644 drivers/gpu/drm/ttm/ttm_page_alloc.c
delete mode 100644 drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
delete mode 100644 drivers/gpu/drm/ttm/ttm_set_memory.h
delete mode 100644 include/drm/ttm/ttm_page_alloc.h
diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index 32257189e09b..64376dd298ed 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -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
diff --git a/drivers/gpu/drm/ttm/Makefile b/drivers/gpu/drm/ttm/Makefile
index 0096bacbcf32..b6f5f87b270f 100644
--- a/drivers/gpu/drm/ttm/Makefile
+++ b/drivers/gpu/drm/ttm/Makefile
@@ -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
diff --git a/drivers/gpu/drm/ttm/ttm_agp_backend.c b/drivers/gpu/drm/ttm/ttm_agp_backend.c
index 4f76c9287159..03c86628e4ac 100644
--- a/drivers/gpu/drm/ttm/ttm_agp_backend.c
+++ b/drivers/gpu/drm/ttm/ttm_agp_backend.c
@@ -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>
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index e9f91cfce5e9..530c9a4af09f 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -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);
diff --git a/drivers/gpu/drm/ttm/ttm_memory.c b/drivers/gpu/drm/ttm/ttm_memory.c
index 3012d0388c51..f9a90bfaa3c1 100644
--- a/drivers/gpu/drm/ttm/ttm_memory.c
+++ b/drivers/gpu/drm/ttm/ttm_memory.c
@@ -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>
@@ -452,8 +451,6 @@ 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));
return 0;
out_no_zone:
@@ -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);
diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc.c b/drivers/gpu/drm/ttm/ttm_page_alloc.c
deleted file mode 100644
index 29e6c29ad60e..000000000000
--- a/drivers/gpu/drm/ttm/ttm_page_alloc.c
+++ /dev/null
@@ -1,1176 +0,0 @@
-/*
- * 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 at redhat.com>
- * Jerome Glisse <jglisse at redhat.com>
- * Pauli Nieminen <suokkos at 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);
diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
deleted file mode 100644
index c0353c25efd6..000000000000
--- a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
+++ /dev/null
@@ -1,1226 +0,0 @@
-/*
- * 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 at 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);
diff --git a/drivers/gpu/drm/ttm/ttm_set_memory.h b/drivers/gpu/drm/ttm/ttm_set_memory.h
deleted file mode 100644
index 2343c18a6133..000000000000
--- a/drivers/gpu/drm/ttm/ttm_set_memory.h
+++ /dev/null
@@ -1,84 +0,0 @@
-/**************************************************************************
- *
- * 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 at 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
diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c
index 90054280cd8f..8861a74ac335 100644
--- a/drivers/gpu/drm/ttm/ttm_tt.c
+++ b/drivers/gpu/drm/ttm/ttm_tt.c
@@ -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;
}
diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h
index 45ae87640909..e9f683fa72dc 100644
--- a/include/drm/ttm/ttm_bo_driver.h
+++ b/include/drm/ttm/ttm_bo_driver.h
@@ -315,8 +315,6 @@ struct ttm_bo_device {
struct delayed_work wq;
- bool need_dma32;
-
bool no_retry;
};
diff --git a/include/drm/ttm/ttm_page_alloc.h b/include/drm/ttm/ttm_page_alloc.h
deleted file mode 100644
index 8fa1e7df6213..000000000000
--- a/include/drm/ttm/ttm_page_alloc.h
+++ /dev/null
@@ -1,122 +0,0 @@
-/*
- * 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 at redhat.com>
- * Jerome Glisse <jglisse at 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
diff --git a/include/drm/ttm/ttm_tt.h b/include/drm/ttm/ttm_tt.h
index df9a80650feb..da27e9d8fa64 100644
--- a/include/drm/ttm/ttm_tt.h
+++ b/include/drm/ttm/ttm_tt.h
@@ -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;
};
--
2.17.1
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