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[Qemu-devel] [PATCH 02/11] dma-helpers: make QEMUSGList target independe
From: |
Paolo Bonzini |
Subject: |
[Qemu-devel] [PATCH 02/11] dma-helpers: make QEMUSGList target independent |
Date: |
Tue, 6 Dec 2011 12:01:23 +0100 |
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 <address@hidden>
---
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
- [Qemu-devel] [PATCH 01/11] qiov: prevent double free or use-after-free, (continued)
- [Qemu-devel] [PATCH 01/11] qiov: prevent double free or use-after-free, Paolo Bonzini, 2011/12/06
- [Qemu-devel] [PATCH 04/11] dma-helpers: add accounting wrappers, Paolo Bonzini, 2011/12/06
- [Qemu-devel] [PATCH 06/11] scsi: add scatter/gather functionality, Paolo Bonzini, 2011/12/06
- [Qemu-devel] [PATCH 03/11] dma-helpers: add dma_buf_read and dma_buf_write, Paolo Bonzini, 2011/12/06
- [Qemu-devel] [PATCH 08/11] virtio-scsi: Add virtio-scsi stub device, Paolo Bonzini, 2011/12/06
- [Qemu-devel] [PATCH 05/11] scsi: pass residual amount to command_complete, Paolo Bonzini, 2011/12/06
- [Qemu-devel] [PATCH 09/11] virtio-scsi: Add basic request processing infrastructure, Paolo Bonzini, 2011/12/06
- [Qemu-devel] [PATCH 07/11] scsi-disk: enable scatter/gather functionality, Paolo Bonzini, 2011/12/06
- [Qemu-devel] [PATCH 10/11] virtio-scsi: add basic SCSI bus operation, Paolo Bonzini, 2011/12/06
- [Qemu-devel] [PATCH 11/11] virtio-scsi: process control queue requests, Paolo Bonzini, 2011/12/06
- [Qemu-devel] [PATCH 02/11] dma-helpers: make QEMUSGList target independent,
Paolo Bonzini <=