* Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
*/
-#include <linux/vmalloc.h>
#include <linux/sched.h>
#include <linux/highmem.h>
#include <linux/pagemap.h>
#include <linux/file.h>
#include <linux/swap.h>
+#include <linux/slab.h>
+#include "drm_cache.h"
+#include "drm_mem_util.h"
#include "ttm/ttm_module.h"
#include "ttm/ttm_bo_driver.h"
#include "ttm/ttm_placement.h"
+#include "ttm/ttm_page_alloc.h"
static int ttm_tt_swapin(struct ttm_tt *ttm);
-#if defined(CONFIG_X86)
-static void ttm_tt_clflush_page(struct page *page)
-{
- uint8_t *page_virtual;
- unsigned int i;
-
- if (unlikely(page == NULL))
- return;
-
- page_virtual = kmap_atomic(page, KM_USER0);
-
- for (i = 0; i < PAGE_SIZE; i += boot_cpu_data.x86_clflush_size)
- clflush(page_virtual + i);
-
- kunmap_atomic(page_virtual, KM_USER0);
-}
-
-static void ttm_tt_cache_flush_clflush(struct page *pages[],
- unsigned long num_pages)
-{
- unsigned long i;
-
- mb();
- for (i = 0; i < num_pages; ++i)
- ttm_tt_clflush_page(*pages++);
- mb();
-}
-#elif !defined(__powerpc__)
-static void ttm_tt_ipi_handler(void *null)
-{
- ;
-}
-#endif
-
-void ttm_tt_cache_flush(struct page *pages[], unsigned long num_pages)
-{
-
-#if defined(CONFIG_X86)
- if (cpu_has_clflush) {
- ttm_tt_cache_flush_clflush(pages, num_pages);
- return;
- }
-#elif defined(__powerpc__)
- unsigned long i;
-
- for (i = 0; i < num_pages; ++i) {
- struct page *page = pages[i];
- void *page_virtual;
-
- if (unlikely(page == NULL))
- continue;
-
- page_virtual = kmap_atomic(page, KM_USER0);
- flush_dcache_range((unsigned long) page_virtual,
- (unsigned long) page_virtual + PAGE_SIZE);
- kunmap_atomic(page_virtual, KM_USER0);
- }
-#else
- if (on_each_cpu(ttm_tt_ipi_handler, NULL, 1) != 0)
- printk(KERN_ERR TTM_PFX
- "Timed out waiting for drm cache flush.\n");
-#endif
-}
-
/**
* Allocates storage for pointers to the pages that back the ttm.
- *
- * Uses kmalloc if possible. Otherwise falls back to vmalloc.
*/
static void ttm_tt_alloc_page_directory(struct ttm_tt *ttm)
{
- unsigned long size = ttm->num_pages * sizeof(*ttm->pages);
- ttm->pages = NULL;
-
- if (size <= PAGE_SIZE)
- ttm->pages = kzalloc(size, GFP_KERNEL);
-
- if (!ttm->pages) {
- ttm->pages = vmalloc_user(size);
- if (ttm->pages)
- ttm->page_flags |= TTM_PAGE_FLAG_VMALLOC;
- }
+ ttm->pages = drm_calloc_large(ttm->num_pages, sizeof(*ttm->pages));
}
static void ttm_tt_free_page_directory(struct ttm_tt *ttm)
{
- if (ttm->page_flags & TTM_PAGE_FLAG_VMALLOC) {
- vfree(ttm->pages);
- ttm->page_flags &= ~TTM_PAGE_FLAG_VMALLOC;
- } else {
- kfree(ttm->pages);
- }
+ drm_free_large(ttm->pages);
ttm->pages = NULL;
}
-static struct page *ttm_tt_alloc_page(unsigned page_flags)
-{
- gfp_t gfp_flags = GFP_HIGHUSER;
-
- if (page_flags & TTM_PAGE_FLAG_ZERO_ALLOC)
- gfp_flags |= __GFP_ZERO;
-
- if (page_flags & TTM_PAGE_FLAG_DMA32)
- gfp_flags |= __GFP_DMA32;
-
- return alloc_page(gfp_flags);
-}
-
static void ttm_tt_free_user_pages(struct ttm_tt *ttm)
{
int write;
set_page_dirty_lock(page);
ttm->pages[i] = NULL;
- ttm_mem_global_free(ttm->bdev->mem_glob, PAGE_SIZE, false);
+ ttm_mem_global_free(ttm->glob->mem_glob, PAGE_SIZE);
put_page(page);
}
ttm->state = tt_unpopulated;
static struct page *__ttm_tt_get_page(struct ttm_tt *ttm, int index)
{
struct page *p;
- struct ttm_bo_device *bdev = ttm->bdev;
- struct ttm_mem_global *mem_glob = bdev->mem_glob;
+ struct list_head h;
+ struct ttm_mem_global *mem_glob = ttm->glob->mem_glob;
int ret;
while (NULL == (p = ttm->pages[index])) {
- p = ttm_tt_alloc_page(ttm->page_flags);
- if (!p)
+ INIT_LIST_HEAD(&h);
+
+ ret = ttm_get_pages(&h, ttm->page_flags, ttm->caching_state, 1);
+
+ if (ret != 0)
return NULL;
- if (PageHighMem(p)) {
- ret =
- ttm_mem_global_alloc(mem_glob, PAGE_SIZE,
- false, false, true);
- if (unlikely(ret != 0))
- goto out_err;
+ p = list_first_entry(&h, struct page, lru);
+
+ ret = ttm_mem_global_alloc_page(mem_glob, p, false, false);
+ if (unlikely(ret != 0))
+ goto out_err;
+
+ if (PageHighMem(p))
ttm->pages[--ttm->first_himem_page] = p;
- } else {
- ret =
- ttm_mem_global_alloc(mem_glob, PAGE_SIZE,
- false, false, false);
- if (unlikely(ret != 0))
- goto out_err;
+ else
ttm->pages[++ttm->last_lomem_page] = p;
- }
}
return p;
out_err:
ttm->state = tt_unbound;
return 0;
}
+EXPORT_SYMBOL(ttm_tt_populate);
#ifdef CONFIG_X86
static inline int ttm_tt_set_page_caching(struct page *p,
- enum ttm_caching_state c_state)
+ enum ttm_caching_state c_old,
+ enum ttm_caching_state c_new)
{
+ int ret = 0;
+
if (PageHighMem(p))
return 0;
- switch (c_state) {
- case tt_cached:
- return set_pages_wb(p, 1);
- case tt_wc:
- return set_memory_wc((unsigned long) page_address(p), 1);
- default:
- return set_pages_uc(p, 1);
+ if (c_old != tt_cached) {
+ /* p isn't in the default caching state, set it to
+ * writeback first to free its current memtype. */
+
+ ret = set_pages_wb(p, 1);
+ if (ret)
+ return ret;
}
+
+ if (c_new == tt_wc)
+ ret = set_memory_wc((unsigned long) page_address(p), 1);
+ else if (c_new == tt_uncached)
+ ret = set_pages_uc(p, 1);
+
+ return ret;
}
#else /* CONFIG_X86 */
static inline int ttm_tt_set_page_caching(struct page *p,
- enum ttm_caching_state c_state)
+ enum ttm_caching_state c_old,
+ enum ttm_caching_state c_new)
{
return 0;
}
if (ttm->caching_state == c_state)
return 0;
- if (c_state != tt_cached) {
- ret = ttm_tt_populate(ttm);
- if (unlikely(ret != 0))
- return ret;
+ if (ttm->state == tt_unpopulated) {
+ /* Change caching but don't populate */
+ ttm->caching_state = c_state;
+ return 0;
}
if (ttm->caching_state == tt_cached)
- ttm_tt_cache_flush(ttm->pages, ttm->num_pages);
+ drm_clflush_pages(ttm->pages, ttm->num_pages);
for (i = 0; i < ttm->num_pages; ++i) {
cur_page = ttm->pages[i];
if (likely(cur_page != NULL)) {
- ret = ttm_tt_set_page_caching(cur_page, c_state);
+ ret = ttm_tt_set_page_caching(cur_page,
+ ttm->caching_state,
+ c_state);
if (unlikely(ret != 0))
goto out_err;
}
for (j = 0; j < i; ++j) {
cur_page = ttm->pages[j];
if (likely(cur_page != NULL)) {
- (void)ttm_tt_set_page_caching(cur_page,
+ (void)ttm_tt_set_page_caching(cur_page, c_state,
ttm->caching_state);
}
}
return ttm_tt_set_caching(ttm, state);
}
+EXPORT_SYMBOL(ttm_tt_set_placement_caching);
static void ttm_tt_free_alloced_pages(struct ttm_tt *ttm)
{
int i;
+ unsigned count = 0;
+ struct list_head h;
struct page *cur_page;
struct ttm_backend *be = ttm->be;
+ INIT_LIST_HEAD(&h);
+
if (be)
be->func->clear(be);
- (void)ttm_tt_set_caching(ttm, tt_cached);
for (i = 0; i < ttm->num_pages; ++i) {
+
cur_page = ttm->pages[i];
ttm->pages[i] = NULL;
if (cur_page) {
printk(KERN_ERR TTM_PFX
"Erroneous page count. "
"Leaking pages.\n");
- ttm_mem_global_free(ttm->bdev->mem_glob, PAGE_SIZE,
- PageHighMem(cur_page));
- __free_page(cur_page);
+ ttm_mem_global_free_page(ttm->glob->mem_glob,
+ cur_page);
+ list_add(&cur_page->lru, &h);
+ count++;
}
}
+ ttm_put_pages(&h, count, ttm->page_flags, ttm->caching_state);
ttm->state = tt_unpopulated;
ttm->first_himem_page = ttm->num_pages;
ttm->last_lomem_page = -1;
struct mm_struct *mm = tsk->mm;
int ret;
int write = (ttm->page_flags & TTM_PAGE_FLAG_WRITE) != 0;
- struct ttm_mem_global *mem_glob = ttm->bdev->mem_glob;
+ struct ttm_mem_global *mem_glob = ttm->glob->mem_glob;
BUG_ON(num_pages != ttm->num_pages);
BUG_ON((ttm->page_flags & TTM_PAGE_FLAG_USER) == 0);
*/
ret = ttm_mem_global_alloc(mem_glob, num_pages * PAGE_SIZE,
- false, false, false);
+ false, false);
if (unlikely(ret != 0))
return ret;
if (ret != num_pages && write) {
ttm_tt_free_user_pages(ttm);
- ttm_mem_global_free(mem_glob, num_pages * PAGE_SIZE, false);
+ ttm_mem_global_free(mem_glob, num_pages * PAGE_SIZE);
return -ENOMEM;
}
if (!ttm)
return NULL;
- ttm->bdev = bdev;
-
+ ttm->glob = bdev->glob;
ttm->num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
ttm->first_himem_page = ttm->num_pages;
ttm->last_lomem_page = -1;
void *from_virtual;
void *to_virtual;
int i;
- int ret;
+ int ret = -ENOMEM;
if (ttm->page_flags & TTM_PAGE_FLAG_USER) {
ret = ttm_tt_set_user(ttm, ttm->tsk, ttm->start,
for (i = 0; i < ttm->num_pages; ++i) {
from_page = read_mapping_page(swap_space, i, NULL);
- if (IS_ERR(from_page))
+ if (IS_ERR(from_page)) {
+ ret = PTR_ERR(from_page);
goto out_err;
+ }
to_page = __ttm_tt_get_page(ttm, i);
if (unlikely(to_page == NULL))
goto out_err;
return 0;
out_err:
ttm_tt_free_alloced_pages(ttm);
- return -ENOMEM;
+ return ret;
}
int ttm_tt_swapout(struct ttm_tt *ttm, struct file *persistant_swap_storage)
void *from_virtual;
void *to_virtual;
int i;
+ int ret = -ENOMEM;
BUG_ON(ttm->state != tt_unbound && ttm->state != tt_unpopulated);
BUG_ON(ttm->caching_state != tt_cached);
0);
if (unlikely(IS_ERR(swap_storage))) {
printk(KERN_ERR "Failed allocating swap storage.\n");
- return -ENOMEM;
+ return PTR_ERR(swap_storage);
}
} else
swap_storage = persistant_swap_storage;
if (unlikely(from_page == NULL))
continue;
to_page = read_mapping_page(swap_space, i, NULL);
- if (unlikely(to_page == NULL))
+ if (unlikely(IS_ERR(to_page))) {
+ ret = PTR_ERR(to_page);
goto out_err;
-
+ }
preempt_disable();
from_virtual = kmap_atomic(from_page, KM_USER0);
to_virtual = kmap_atomic(to_page, KM_USER1);
if (!persistant_swap_storage)
fput(swap_storage);
- return -ENOMEM;
+ return ret;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff