[Qemu-devel] [PATCH 02/11] dma-helpers: make QEMUSGList target independent

[Paolo Bonzini <pbonzini@redhat.com>]

This lets scsi-* observe the overall s/g list and pass it to the DMA
helpers.

size_t can potentially be smaller than dma_addr_t.  However, the overall
size of a S/G list can actually be bigger than dma_addr_t because (for
writes) you could reuse the same buffer multiple times.  So there is
no difference in practice.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 dma.h |   14 +++++++-------
 1 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/dma.h b/dma.h
index a13209d..d50019b 100644
--- a/dma.h
+++ b/dma.h
@@ -17,6 +17,13 @@
 
 typedef struct ScatterGatherEntry ScatterGatherEntry;
 
+struct QEMUSGList {
+    ScatterGatherEntry *sg;
+    int nsg;
+    int nalloc;
+    size_t size;
+};
+
 #if defined(TARGET_PHYS_ADDR_BITS)
 typedef target_phys_addr_t dma_addr_t;
 
@@ -32,13 +39,6 @@ struct ScatterGatherEntry {
     dma_addr_t len;
 };
 
-struct QEMUSGList {
-    ScatterGatherEntry *sg;
-    int nsg;
-    int nalloc;
-    dma_addr_t size;
-};
-
 void qemu_sglist_init(QEMUSGList *qsg, int alloc_hint);
 void qemu_sglist_add(QEMUSGList *qsg, dma_addr_t base, dma_addr_t len);
 void qemu_sglist_destroy(QEMUSGList *qsg);
-- 
1.7.7.1