From 7dff3f6b29af2df6e2209f9f56991d0ad06fa777 Mon Sep 17 00:00:00 2001 From: David Gibson Date: Mon, 31 Oct 2011 17:06:46 +1100 Subject: [PATCH] Use dma_addr_t type for scatter/gather code This patch uses the newly created dma_addr_t type throughout the scatter/gather handling code in dma-helpers.c whenever we need to represent a dma bus address. This makes a better distinction as to what is a bus address and what is a cpu physical address. Since we don't support IOMMUs yet, they can't be very different for now, but that will change in future, and this preliminary helps clarify what's going on. Signed-off-by: David Gibson Signed-off-by: Anthony Liguori --- dma-helpers.c | 5 ++--- dma.h | 9 ++++----- 2 files changed, 6 insertions(+), 8 deletions(-) diff --git a/dma-helpers.c b/dma-helpers.c index 86d2d0a..bdcd38c 100644 --- a/dma-helpers.c +++ b/dma-helpers.c @@ -18,8 +18,7 @@ void qemu_sglist_init(QEMUSGList *qsg, int alloc_hint) qsg->size = 0; } -void qemu_sglist_add(QEMUSGList *qsg, target_phys_addr_t base, - target_phys_addr_t len) +void qemu_sglist_add(QEMUSGList *qsg, dma_addr_t base, dma_addr_t len) { if (qsg->nsg == qsg->nalloc) { qsg->nalloc = 2 * qsg->nalloc + 1; @@ -45,7 +44,7 @@ typedef struct { bool to_dev; bool in_cancel; int sg_cur_index; - target_phys_addr_t sg_cur_byte; + dma_addr_t sg_cur_byte; QEMUIOVector iov; QEMUBH *bh; DMAIOFunc *io_func; diff --git a/dma.h b/dma.h index 56e163a..a13209d 100644 --- a/dma.h +++ b/dma.h @@ -28,20 +28,19 @@ typedef enum { } DMADirection; struct ScatterGatherEntry { - target_phys_addr_t base; - target_phys_addr_t len; + dma_addr_t base; + dma_addr_t len; }; struct QEMUSGList { ScatterGatherEntry *sg; int nsg; int nalloc; - target_phys_addr_t size; + dma_addr_t size; }; void qemu_sglist_init(QEMUSGList *qsg, int alloc_hint); -void qemu_sglist_add(QEMUSGList *qsg, target_phys_addr_t base, - target_phys_addr_t len); +void qemu_sglist_add(QEMUSGList *qsg, dma_addr_t base, dma_addr_t len); void qemu_sglist_destroy(QEMUSGList *qsg); #endif -- 2.7.4