#include <linux/dma-mapping.h>
#include <linux/slab.h>
#include <linux/bitmap.h>
-#if defined(CONFIG_X86)
-#include <asm/memtype.h>
-#endif
#include <linux/sched.h>
#include <linux/sched/mm.h>
#include <linux/sched/task.h>
switch (cmd) {
case MLX5_IB_MMAP_WC_PAGE:
case MLX5_IB_MMAP_ALLOC_WC:
-/* Some architectures don't support WC memory */
-#if defined(CONFIG_X86)
- if (!pat_enabled())
- return -EPERM;
-#elif !(defined(CONFIG_PPC) || (defined(CONFIG_ARM) && defined(CONFIG_MMU)))
- return -EPERM;
-#endif
- /* fall through */
case MLX5_IB_MMAP_REGULAR_PAGE:
/* For MLX5_IB_MMAP_REGULAR_PAGE do the best effort to get WC */
prot = pgprot_writecombine(vma->vm_page_prot);
command = get_command(vma->vm_pgoff);
switch (command) {
case MLX5_IB_MMAP_WC_PAGE:
+ case MLX5_IB_MMAP_ALLOC_WC:
+ if (!dev->wc_support)
+ return -EPERM;
+ fallthrough;
case MLX5_IB_MMAP_NC_PAGE:
case MLX5_IB_MMAP_REGULAR_PAGE:
- case MLX5_IB_MMAP_ALLOC_WC:
return uar_mmap(dev, command, vma, context);
case MLX5_IB_MMAP_GET_CONTIGUOUS_PAGES:
if (!dev->mdev->roce.roce_en &&
port_type_cap == MLX5_CAP_PORT_TYPE_ETH) {
if (mlx5_core_is_pf(dev->mdev))
- dev->wc_support = true;
+ dev->wc_support = arch_can_pci_mmap_wc();
return 0;
}