#include <linux/uaccess.h>
#include <linux/ktime.h>
#include <linux/debugfs.h>
+#include <linux/highmem.h>
#include "gup_test.h"
static void put_back_pages(unsigned int cmd, struct page **pages,
unsigned long nr_pages)
{
unsigned long i;
- struct page *page;
+ struct folio *folio;
switch (cmd) {
case PIN_FAST_BENCHMARK:
case PIN_BASIC_TEST:
case PIN_LONGTERM_BENCHMARK:
for (i = 0; i < nr_pages; i++) {
- page = pages[i];
- if (WARN(!page_maybe_dma_pinned(page),
+ folio = page_folio(pages[i]);
+
+ if (WARN(!folio_maybe_dma_pinned(folio),
"pages[%lu] is NOT dma-pinned\n", i)) {
- dump_page(page, "gup_test failure");
+ dump_page(&folio->page, "gup_test failure");
break;
} else if (cmd == PIN_LONGTERM_BENCHMARK &&
- WARN(!is_longterm_pinnable_page(page),
+ WARN(!folio_is_longterm_pinnable(folio),
"pages[%lu] is NOT pinnable but pinned\n",
i)) {
- dump_page(page, "gup_test failure");
+ dump_page(&folio->page, "gup_test failure");
break;
}
}
pages + i);
break;
case GUP_BASIC_TEST:
- nr = get_user_pages(addr, nr, gup->gup_flags, pages + i,
- NULL);
+ nr = get_user_pages(addr, nr, gup->gup_flags, pages + i);
break;
case PIN_FAST_BENCHMARK:
nr = pin_user_pages_fast(addr, nr, gup->gup_flags,
pages + i);
break;
case PIN_BASIC_TEST:
- nr = pin_user_pages(addr, nr, gup->gup_flags, pages + i,
- NULL);
+ nr = pin_user_pages(addr, nr, gup->gup_flags, pages + i);
break;
case PIN_LONGTERM_BENCHMARK:
nr = pin_user_pages(addr, nr,
gup->gup_flags | FOLL_LONGTERM,
- pages + i, NULL);
+ pages + i);
break;
case DUMP_USER_PAGES_TEST:
if (gup->test_flags & GUP_TEST_FLAG_DUMP_PAGES_USE_PIN)
nr = pin_user_pages(addr, nr, gup->gup_flags,
- pages + i, NULL);
+ pages + i);
else
nr = get_user_pages(addr, nr, gup->gup_flags,
- pages + i, NULL);
+ pages + i);
break;
default:
ret = -EINVAL;
return ret;
}
+static DEFINE_MUTEX(pin_longterm_test_mutex);
+static struct page **pin_longterm_test_pages;
+static unsigned long pin_longterm_test_nr_pages;
+
+static inline void pin_longterm_test_stop(void)
+{
+ if (pin_longterm_test_pages) {
+ if (pin_longterm_test_nr_pages)
+ unpin_user_pages(pin_longterm_test_pages,
+ pin_longterm_test_nr_pages);
+ kvfree(pin_longterm_test_pages);
+ pin_longterm_test_pages = NULL;
+ pin_longterm_test_nr_pages = 0;
+ }
+}
+
+static inline int pin_longterm_test_start(unsigned long arg)
+{
+ long nr_pages, cur_pages, addr, remaining_pages;
+ int gup_flags = FOLL_LONGTERM;
+ struct pin_longterm_test args;
+ struct page **pages;
+ int ret = 0;
+ bool fast;
+
+ if (pin_longterm_test_pages)
+ return -EINVAL;
+
+ if (copy_from_user(&args, (void __user *)arg, sizeof(args)))
+ return -EFAULT;
+
+ if (args.flags &
+ ~(PIN_LONGTERM_TEST_FLAG_USE_WRITE|PIN_LONGTERM_TEST_FLAG_USE_FAST))
+ return -EINVAL;
+ if (!IS_ALIGNED(args.addr | args.size, PAGE_SIZE))
+ return -EINVAL;
+ if (args.size > LONG_MAX)
+ return -EINVAL;
+ nr_pages = args.size / PAGE_SIZE;
+ if (!nr_pages)
+ return -EINVAL;
+
+ pages = kvcalloc(nr_pages, sizeof(void *), GFP_KERNEL);
+ if (!pages)
+ return -ENOMEM;
+
+ if (args.flags & PIN_LONGTERM_TEST_FLAG_USE_WRITE)
+ gup_flags |= FOLL_WRITE;
+ fast = !!(args.flags & PIN_LONGTERM_TEST_FLAG_USE_FAST);
+
+ if (!fast && mmap_read_lock_killable(current->mm)) {
+ kvfree(pages);
+ return -EINTR;
+ }
+
+ pin_longterm_test_pages = pages;
+ pin_longterm_test_nr_pages = 0;
+
+ while (nr_pages - pin_longterm_test_nr_pages) {
+ remaining_pages = nr_pages - pin_longterm_test_nr_pages;
+ addr = args.addr + pin_longterm_test_nr_pages * PAGE_SIZE;
+
+ if (fast)
+ cur_pages = pin_user_pages_fast(addr, remaining_pages,
+ gup_flags, pages);
+ else
+ cur_pages = pin_user_pages(addr, remaining_pages,
+ gup_flags, pages);
+ if (cur_pages < 0) {
+ pin_longterm_test_stop();
+ ret = cur_pages;
+ break;
+ }
+ pin_longterm_test_nr_pages += cur_pages;
+ pages += cur_pages;
+ }
+
+ if (!fast)
+ mmap_read_unlock(current->mm);
+ return ret;
+}
+
+static inline int pin_longterm_test_read(unsigned long arg)
+{
+ __u64 user_addr;
+ unsigned long i;
+
+ if (!pin_longterm_test_pages)
+ return -EINVAL;
+
+ if (copy_from_user(&user_addr, (void __user *)arg, sizeof(user_addr)))
+ return -EFAULT;
+
+ for (i = 0; i < pin_longterm_test_nr_pages; i++) {
+ void *addr = kmap_local_page(pin_longterm_test_pages[i]);
+ unsigned long ret;
+
+ ret = copy_to_user((void __user *)(unsigned long)user_addr, addr,
+ PAGE_SIZE);
+ kunmap_local(addr);
+ if (ret)
+ return -EFAULT;
+ user_addr += PAGE_SIZE;
+ }
+ return 0;
+}
+
+static long pin_longterm_test_ioctl(struct file *filep, unsigned int cmd,
+ unsigned long arg)
+{
+ int ret = -EINVAL;
+
+ if (mutex_lock_killable(&pin_longterm_test_mutex))
+ return -EINTR;
+
+ switch (cmd) {
+ case PIN_LONGTERM_TEST_START:
+ ret = pin_longterm_test_start(arg);
+ break;
+ case PIN_LONGTERM_TEST_STOP:
+ pin_longterm_test_stop();
+ ret = 0;
+ break;
+ case PIN_LONGTERM_TEST_READ:
+ ret = pin_longterm_test_read(arg);
+ break;
+ }
+
+ mutex_unlock(&pin_longterm_test_mutex);
+ return ret;
+}
+
static long gup_test_ioctl(struct file *filep, unsigned int cmd,
unsigned long arg)
{
case PIN_BASIC_TEST:
case DUMP_USER_PAGES_TEST:
break;
+ case PIN_LONGTERM_TEST_START:
+ case PIN_LONGTERM_TEST_STOP:
+ case PIN_LONGTERM_TEST_READ:
+ return pin_longterm_test_ioctl(filep, cmd, arg);
default:
return -EINVAL;
}
return 0;
}
+static int gup_test_release(struct inode *inode, struct file *file)
+{
+ pin_longterm_test_stop();
+
+ return 0;
+}
+
static const struct file_operations gup_test_fops = {
.open = nonseekable_open,
.unlocked_ioctl = gup_test_ioctl,
+ .compat_ioctl = compat_ptr_ioctl,
+ .release = gup_test_release,
};
static int __init gup_test_init(void)
projects / linux-2.6-microblaze.git / blobdiff