LinuxKPI: Implement dma_map_resource/dma_unmap_resource functions

dma_map_resource() and dma_unmap_resource() functions are used to map
and unmap of memory-mapped IO resources so they can be accessed by
the device.

Required by drm-kmod v5.5 to be built.

While for drm-kmod 6.6-lts only amdgpu uses these in one place and
the code apparently has not been exercised a lot it has been around
like this for years.  With changing the underlying implementations
bring it into the tree; should we find errors with it they can also
be fixed here.

Bump __FreeBSD version to be able to detect this change.

Obtained from:	D30933 (by wulf)
Sponsored by:	The FreeBSD Foundation
MFC after:	3 days
Reviewed by:	dumbbell
Differential Revision: https://reviews.freebsd.org/D49625

3 files changed, 19 insertions, 1 deletions

diff --git a/UPDATING b/UPDATING
index 53ce5a4b3095..bee8b348f113 100644
--- a/UPDATING
+++ b/UPDATING
@@ -27,6 +27,10 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 15.x IS SLOW:
 	world, or to merely disable the most expensive debugging functionality
 	at runtime, run "ln -s 'abort:false,junk:false' /etc/malloc.conf".)
 
+20250603:
+	LinuxKPI dma-mapping.h were pulled into the tree from drm-kmod.
+	Bump _FreeBSD_version to 1500045 to be able to detect this change.
+
 20250527:
 	The CAM target layer userland, i.e. ctld(8), ctladm(8) and ctlstat(8),
 	has moved to the new FreeBSD-ctl package.  If you use pkgbase and you
diff --git a/sys/compat/linuxkpi/common/include/linux/dma-mapping.h b/sys/compat/linuxkpi/common/include/linux/dma-mapping.h
index 09d5e4b6bc22..2d8e1196d3d3 100644
--- a/sys/compat/linuxkpi/common/include/linux/dma-mapping.h
+++ b/sys/compat/linuxkpi/common/include/linux/dma-mapping.h
@@ -214,6 +214,20 @@ dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
 	lkpi_dma_unmap(dev, dma_address, size, direction, 0);
 }
 
+static inline dma_addr_t
+dma_map_resource(struct device *dev, phys_addr_t paddr, size_t size,
+    enum dma_data_direction direction, unsigned long attrs)
+{
+	return (lkpi_dma_map_phys(dev, paddr, size, direction, attrs));
+}
+
+static inline void
+dma_unmap_resource(struct device *dev, dma_addr_t dma, size_t size,
+    enum dma_data_direction direction, unsigned long attrs)
+{
+	lkpi_dma_unmap(dev, dma, size, direction, attrs);
+}
+
 static inline void
 dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma, size_t size,
     enum dma_data_direction direction)
diff --git a/sys/sys/param.h b/sys/sys/param.h
index 0a08d4740593..98fb0aeacef0 100644
--- a/sys/sys/param.h
+++ b/sys/sys/param.h
@@ -73,7 +73,7 @@
  * cannot include sys/param.h and should only be updated here.
  */
 #undef __FreeBSD_version
-#define __FreeBSD_version 1500044
+#define __FreeBSD_version 1500045
 
 /*
  * __FreeBSD_kernel__ indicates that this system uses the kernel of FreeBSD,