drm: remove drm specific kmap_atomic code

kmap_atomic_prot() is now exported by all architectures.  Use this
function rather than open coding a driver specific kmap_atomic.

[arnd@arndb.de: include linux/highmem.h]
Link: http://lkml.kernel.org/r/20200508220150.649044-1-arnd@arndb.de
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Chris Zankel <chris@zankel.net>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Helge Deller <deller@gmx.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20200507150004.1423069-12-ira.weiny@intel.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c
index 52d2b71..f09b096 100644 (file)
--- a/drivers/gpu/drm/ttm/ttm_bo_util.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_util.c
@@ -257,54 +257,6 @@ static int ttm_copy_io_page(void *dst, void *src, unsigned long page)
        return 0;
 }
 
-#ifdef CONFIG_X86
-#define __ttm_kmap_atomic_prot(__page, __prot) kmap_atomic_prot(__page, __prot)
-#define __ttm_kunmap_atomic(__addr) kunmap_atomic(__addr)
-#else
-#define __ttm_kmap_atomic_prot(__page, __prot) vmap(&__page, 1, 0,  __prot)
-#define __ttm_kunmap_atomic(__addr) vunmap(__addr)
-#endif
-
-
-/**
- * ttm_kmap_atomic_prot - Efficient kernel map of a single page with
- * specified page protection.
- *
- * @page: The page to map.
- * @prot: The page protection.
- *
- * This function maps a TTM page using the kmap_atomic api if available,
- * otherwise falls back to vmap. The user must make sure that the
- * specified page does not have an aliased mapping with a different caching
- * policy unless the architecture explicitly allows it. Also mapping and
- * unmapping using this api must be correctly nested. Unmapping should
- * occur in the reverse order of mapping.
- */
-void *ttm_kmap_atomic_prot(struct page *page, pgprot_t prot)
-{
-       if (pgprot_val(prot) == pgprot_val(PAGE_KERNEL))
-               return kmap_atomic(page);
-       else
-               return __ttm_kmap_atomic_prot(page, prot);
-}
-EXPORT_SYMBOL(ttm_kmap_atomic_prot);
-
-/**
- * ttm_kunmap_atomic_prot - Unmap a page that was mapped using
- * ttm_kmap_atomic_prot.
- *
- * @addr: The virtual address from the map.
- * @prot: The page protection.
- */
-void ttm_kunmap_atomic_prot(void *addr, pgprot_t prot)
-{
-       if (pgprot_val(prot) == pgprot_val(PAGE_KERNEL))
-               kunmap_atomic(addr);
-       else
-               __ttm_kunmap_atomic(addr);
-}
-EXPORT_SYMBOL(ttm_kunmap_atomic_prot);
-
 static int ttm_copy_io_ttm_page(struct ttm_tt *ttm, void *src,
                                unsigned long page,
                                pgprot_t prot)
@@ -316,13 +268,13 @@ static int ttm_copy_io_ttm_page(struct ttm_tt *ttm, void *src,
                return -ENOMEM;
 
        src = (void *)((unsigned long)src + (page << PAGE_SHIFT));
-       dst = ttm_kmap_atomic_prot(d, prot);
+       dst = kmap_atomic_prot(d, prot);
        if (!dst)
                return -ENOMEM;
 
        memcpy_fromio(dst, src, PAGE_SIZE);
 
-       ttm_kunmap_atomic_prot(dst, prot);
+       kunmap_atomic(dst);
 
        return 0;
 }
@@ -338,13 +290,13 @@ static int ttm_copy_ttm_io_page(struct ttm_tt *ttm, void *dst,
                return -ENOMEM;
 
        dst = (void *)((unsigned long)dst + (page << PAGE_SHIFT));
-       src = ttm_kmap_atomic_prot(s, prot);
+       src = kmap_atomic_prot(s, prot);
        if (!src)
                return -ENOMEM;
 
        memcpy_toio(dst, src, PAGE_SIZE);
 
-       ttm_kunmap_atomic_prot(src, prot);
+       kunmap_atomic(src);
 
        return 0;
 }

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_blit.c b/drivers/gpu/drm/vmwgfx/vmwgfx_blit.c
index bb46ca0..1629427 100644 (file)
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_blit.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_blit.c
@@ -27,6 +27,7 @@
  **************************************************************************/
 
 #include "vmwgfx_drv.h"
+#include <linux/highmem.h>
 
 /*
  * Template that implements find_first_diff() for a generic
@@ -374,12 +375,12 @@ static int vmw_bo_cpu_blit_line(struct vmw_bo_blit_line_data *d,
                copy_size = min_t(u32, copy_size, PAGE_SIZE - src_page_offset);
 
                if (unmap_src) {
-                       ttm_kunmap_atomic_prot(d->src_addr, d->src_prot);
+                       kunmap_atomic(d->src_addr);
                        d->src_addr = NULL;
                }
 
                if (unmap_dst) {
-                       ttm_kunmap_atomic_prot(d->dst_addr, d->dst_prot);
+                       kunmap_atomic(d->dst_addr);
                        d->dst_addr = NULL;
                }
 
@@ -388,8 +389,8 @@ static int vmw_bo_cpu_blit_line(struct vmw_bo_blit_line_data *d,
                                return -EINVAL;
 
                        d->dst_addr =
-                               ttm_kmap_atomic_prot(d->dst_pages[dst_page],
-                                                    d->dst_prot);
+                               kmap_atomic_prot(d->dst_pages[dst_page],
+                                                d->dst_prot);
                        if (!d->dst_addr)
                                return -ENOMEM;
 
@@ -401,8 +402,8 @@ static int vmw_bo_cpu_blit_line(struct vmw_bo_blit_line_data *d,
                                return -EINVAL;
 
                        d->src_addr =
-                               ttm_kmap_atomic_prot(d->src_pages[src_page],
-                                                    d->src_prot);
+                               kmap_atomic_prot(d->src_pages[src_page],
+                                                d->src_prot);
                        if (!d->src_addr)
                                return -ENOMEM;
 
@@ -499,9 +500,9 @@ int vmw_bo_cpu_blit(struct ttm_buffer_object *dst,
        }
 out:
        if (d.src_addr)
-               ttm_kunmap_atomic_prot(d.src_addr, d.src_prot);
+               kunmap_atomic(d.src_addr);
        if (d.dst_addr)
-               ttm_kunmap_atomic_prot(d.dst_addr, d.dst_prot);
+               kunmap_atomic(d.dst_addr);
 
        return ret;
 }

diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h
index 0a9d042..de1ccdc 100644 (file)
--- a/include/drm/ttm/ttm_bo_api.h
+++ b/include/drm/ttm/ttm_bo_api.h
@@ -668,10 +668,6 @@ int ttm_bo_mmap_obj(struct vm_area_struct *vma, struct ttm_buffer_object *bo);
 int ttm_bo_mmap(struct file *filp, struct vm_area_struct *vma,
                struct ttm_bo_device *bdev);
 
-void *ttm_kmap_atomic_prot(struct page *page, pgprot_t prot);
-
-void ttm_kunmap_atomic_prot(void *addr, pgprot_t prot);
-
 /**
  * ttm_bo_io
  *