From 83b3d2b7b6061bfa7d433fac12d52ba53307d5de Mon Sep 17 00:00:00 2001
From: Mark Kettenis <kettenis@openbsd.org>
Date: Sat, 9 Mar 2013 21:24:32 +0100
Subject: Add agp_bus_dma_rebind(), and interface to re-enter mappings into the
 GART/GTT when we resume or want to change for example the cachability of the
 mapping.

---
 sys/arch/amd64/amd64/sg_dma.c    | 12 ++++++++++++
 sys/arch/amd64/include/bus.h     |  1 +
 sys/arch/amd64/pci/agp_machdep.c |  6 ++++++
 sys/arch/i386/i386/sg_dma.c      | 12 ++++++++++++
 sys/arch/i386/include/bus.h      |  2 +-
 sys/arch/i386/pci/agp_machdep.c  |  6 ++++++
 sys/dev/pci/agpvar.h             |  1 +
 7 files changed, 39 insertions(+), 1 deletion(-)

(limited to 'sys')

diff --git a/sys/arch/amd64/amd64/sg_dma.c b/sys/arch/amd64/amd64/sg_dma.c
index 67d6eee4659..79853971117 100644
--- a/sys/arch/amd64/amd64/sg_dma.c
+++ b/sys/arch/amd64/amd64/sg_dma.c
@@ -786,6 +786,18 @@ sg_dmamap_unload(bus_dma_tag_t t, bus_dmamap_t map)
 	_bus_dmamap_unload(t, map);
 }
 
+/* 
+ * Reload a dvmamap.
+ */
+void
+sg_dmamap_reload(bus_dma_tag_t t, bus_dmamap_t map, int flags)
+{
+	struct sg_cookie	*is = t->_cookie;
+	struct sg_page_map	*spm = map->_dm_cookie;
+
+	sg_iomap_load_map(is, spm, spm->spm_start, flags);
+}
+
 /*
  * Alloc dma safe memory, telling the backend that we're scatter gather
  * to ease pressure on the vm.
diff --git a/sys/arch/amd64/include/bus.h b/sys/arch/amd64/include/bus.h
index 5c8fab5b0bc..8dddac3ccb0 100644
--- a/sys/arch/amd64/include/bus.h
+++ b/sys/arch/amd64/include/bus.h
@@ -670,6 +670,7 @@ int	sg_dmamap_load_buffer(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t,
 	    struct proc *, int, int *, int);
 int	sg_dmamap_load_physarray(bus_dma_tag_t, bus_dmamap_t, paddr_t *,
 	    int, int, int *, int);
+void	sg_dmamap_reload(bus_dma_tag_t, bus_dmamap_t, int);
 int	sg_dmamem_alloc(bus_dma_tag_t, bus_size_t, bus_size_t, bus_size_t,
 	    bus_dma_segment_t *, int, int *, int);
 
diff --git a/sys/arch/amd64/pci/agp_machdep.c b/sys/arch/amd64/pci/agp_machdep.c
index 94a94d5fdb7..ee3bd4671a7 100644
--- a/sys/arch/amd64/pci/agp_machdep.c
+++ b/sys/arch/amd64/pci/agp_machdep.c
@@ -174,6 +174,12 @@ agp_bus_dma_set_alignment(bus_dma_tag_t tag, bus_dmamap_t dmam,
 	sg_dmamap_set_alignment(tag, dmam, alignment);
 }
 
+void
+agp_bus_dma_rebind(bus_dma_tag_t tag, bus_dmamap_t dmam, int flags)
+{
+	sg_dmamap_reload(tag, dmam, flags);
+}
+
 struct agp_map {
 	bus_space_tag_t		bst;
 	bus_space_handle_t	bsh;
diff --git a/sys/arch/i386/i386/sg_dma.c b/sys/arch/i386/i386/sg_dma.c
index 1f45bf21c83..8ae3ae976df 100644
--- a/sys/arch/i386/i386/sg_dma.c
+++ b/sys/arch/i386/i386/sg_dma.c
@@ -786,6 +786,18 @@ sg_dmamap_unload(bus_dma_tag_t t, bus_dmamap_t map)
 	_bus_dmamap_unload(t, map);
 }
 
+/* 
+ * Reload a dvmamap.
+ */
+void
+sg_dmamap_reload(bus_dma_tag_t t, bus_dmamap_t map, int flags)
+{
+	struct sg_cookie	*is = t->_cookie;
+	struct sg_page_map	*spm = map->_dm_cookie;
+
+	sg_iomap_load_map(is, spm, spm->spm_start, flags);
+}
+
 /*
  * Alloc dma safe memory, telling the backend that we're scatter gather
  * to ease pressure on the vm.
diff --git a/sys/arch/i386/include/bus.h b/sys/arch/i386/include/bus.h
index a6f92620a44..4e96f614637 100644
--- a/sys/arch/i386/include/bus.h
+++ b/sys/arch/i386/include/bus.h
@@ -679,8 +679,8 @@ int	sg_dmamap_load_buffer(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t,
 	    struct proc *, int, int *, int);
 int	sg_dmamap_load_physarray(bus_dma_tag_t, bus_dmamap_t, paddr_t *,
 	    int, int, int *, int);
+void	sg_dmamap_reload(bus_dma_tag_t, bus_dmamap_t, int);
 int	sg_dmamem_alloc(bus_dma_tag_t, bus_size_t, bus_size_t, bus_size_t,
 	    bus_dma_segment_t *, int, int *, int);
 
-
 #endif /* _MACHINE_BUS_H_ */
diff --git a/sys/arch/i386/pci/agp_machdep.c b/sys/arch/i386/pci/agp_machdep.c
index e6eaa41a00c..7d69152b9ac 100644
--- a/sys/arch/i386/pci/agp_machdep.c
+++ b/sys/arch/i386/pci/agp_machdep.c
@@ -174,6 +174,12 @@ agp_bus_dma_set_alignment(bus_dma_tag_t tag, bus_dmamap_t dmam,
 	sg_dmamap_set_alignment(tag, dmam, alignment);
 }
 
+void
+agp_bus_dma_rebind(bus_dma_tag_t tag, bus_dmamap_t dmam, int flags)
+{
+	sg_dmamap_reload(tag, dmam, flags);
+}
+
 struct agp_map {
 	bus_space_tag_t	bst;
 	bus_addr_t	addr;
diff --git a/sys/dev/pci/agpvar.h b/sys/dev/pci/agpvar.h
index 21927155e51..cf6e5fce065 100644
--- a/sys/dev/pci/agpvar.h
+++ b/sys/dev/pci/agpvar.h
@@ -193,6 +193,7 @@ int	agp_bus_dma_init(struct agp_softc *, bus_addr_t, bus_addr_t,
 void	agp_bus_dma_destroy(struct agp_softc *, bus_dma_tag_t);
 void	agp_bus_dma_set_alignment(bus_dma_tag_t, bus_dmamap_t,
 	    u_long);
+void	agp_bus_dma_rebind(bus_dma_tag_t, bus_dmamap_t, int);
 
 void	*agp_map(struct agp_softc *, bus_addr_t, bus_size_t,
 	    bus_space_handle_t *);
-- 
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