git: 825b33fccdd9 - stable/13 - linuxkpi: Add for_each_sgtable_dma_sg and for_each_sgtable_dma_page

The branch stable/13 has been updated by manu:

URL: https://cgit.FreeBSD.org/src/commit/?id=825b33fccdd98ff1905cfe3c68a8093b365a5b2c

commit 825b33fccdd98ff1905cfe3c68a8093b365a5b2c
Author:     Emmanuel Vadot <manu@FreeBSD.org>
AuthorDate: 2022-03-29 11:02:25 +0000
Commit:     Emmanuel Vadot <manu@FreeBSD.org>
CommitDate: 2022-04-27 16:38:06 +0000

    linuxkpi: Add for_each_sgtable_dma_sg and for_each_sgtable_dma_page
    
    Variants of for_each_sg/for_each_sg_dma_page but they operate on sgtable
    structs.
    Needed by drm v5.10
    
    MFC after:      1 week
    Sponsored by:   Beckhoff Automation GmbH & Co. KG
    
    (cherry picked from commit 1aca8a6ec61cce1a4673a8f7b5412b106e366aff)
---
 sys/compat/linuxkpi/common/include/linux/scatterlist.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/sys/compat/linuxkpi/common/include/linux/scatterlist.h b/sys/compat/linuxkpi/common/include/linux/scatterlist.h
index 23a083577b30..d51c45853945 100644
--- a/sys/compat/linuxkpi/common/include/linux/scatterlist.h
+++ b/sys/compat/linuxkpi/common/include/linux/scatterlist.h
@@ -99,6 +99,12 @@ struct sg_dma_page_iter {
 #define	for_each_sg(sglist, sg, sgmax, iter)				\
 	for (iter = 0, sg = (sglist); iter < (sgmax); iter++, sg = sg_next(sg))
 
+#define	for_each_sgtable_dma_sg(sgt, sg, iter)				\
+	for_each_sg((sgt)->sgl, sg, (sgt)->nents, iter)
+
+#define	for_each_sgtable_dma_page(sgt, iter, pgoffset)			\
+	for_each_sg_dma_page((sgt)->sgl, iter, (sgt)->nents, pgoffset)
+
 typedef struct scatterlist *(sg_alloc_fn) (unsigned int, gfp_t);
 typedef void (sg_free_fn) (struct scatterlist *, unsigned int);