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authorLars-Peter Clausen <lars@metafoo.de>2012-04-25 20:50:51 +0200
committerVinod Koul <vinod.koul@linux.intel.com>2012-05-11 12:04:38 +0530
commitcbb796ccd8c33c50249b876d9773dfa8e67d39cb (patch)
treee1384d10cf0cf86328a69c4f9bf6931dbe9250fe
parent12366ad91adb41a193f93b3b0f2829ea06df1773 (diff)
downloadop-kernel-dev-cbb796ccd8c33c50249b876d9773dfa8e67d39cb.zip
op-kernel-dev-cbb796ccd8c33c50249b876d9773dfa8e67d39cb.tar.gz
dmaengine: Use sg_dma_address instead of sg_phys
dmaengine drivers should always use sg_dma_address instead of sg_phys to get the addresses for the transfer from a sg element. To quote Russel King: sg_phys(sg) of course has nothing to do with DMA addresses. It's the physical address _to the CPU_ of the memory associated with the scatterlist entry. That may, or may not have the same value for the DMA engine, particularly if IOMMUs are involved. And if these drivers are used on ARM, they must be fixed, sooner rather than later. There's patches in the works which will mean we will end up with IOMMU support in the DMA mapping later, which means everything I've said above will become reality. The patch has been generated using the following coccinelle patch: <smpl> @@ struct scatterlist *sg; @@ -sg_phys(sg) +sg_dma_address(sg) </smpl> Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
-rw-r--r--drivers/dma/amba-pl08x.c4
-rw-r--r--drivers/dma/coh901318_lli.c4
-rw-r--r--drivers/dma/dw_dmac.c4
-rw-r--r--drivers/dma/intel_mid_dma.c2
-rw-r--r--drivers/dma/pch_dma.c2
5 files changed, 8 insertions, 8 deletions
diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c
index e7d5550..003220a 100644
--- a/drivers/dma/amba-pl08x.c
+++ b/drivers/dma/amba-pl08x.c
@@ -1382,11 +1382,11 @@ static struct dma_async_tx_descriptor *pl08x_prep_slave_sg(
dsg->len = sg_dma_len(sg);
if (direction == DMA_MEM_TO_DEV) {
- dsg->src_addr = sg_phys(sg);
+ dsg->src_addr = sg_dma_address(sg);
dsg->dst_addr = slave_addr;
} else {
dsg->src_addr = slave_addr;
- dsg->dst_addr = sg_phys(sg);
+ dsg->dst_addr = sg_dma_address(sg);
}
}
diff --git a/drivers/dma/coh901318_lli.c b/drivers/dma/coh901318_lli.c
index 6c0e2d4..780e042 100644
--- a/drivers/dma/coh901318_lli.c
+++ b/drivers/dma/coh901318_lli.c
@@ -270,10 +270,10 @@ coh901318_lli_fill_sg(struct coh901318_pool *pool,
if (dir == DMA_MEM_TO_DEV)
/* increment source address */
- src = sg_phys(sg);
+ src = sg_dma_address(sg);
else
/* increment destination address */
- dst = sg_phys(sg);
+ dst = sg_dma_address(sg);
bytes_to_transfer = sg_dma_len(sg);
diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c
index 13b9298..e23dc82 100644
--- a/drivers/dma/dw_dmac.c
+++ b/drivers/dma/dw_dmac.c
@@ -743,7 +743,7 @@ dwc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
struct dw_desc *desc;
u32 len, dlen, mem;
- mem = sg_phys(sg);
+ mem = sg_dma_address(sg);
len = sg_dma_len(sg);
if (!((mem | len) & 7))
@@ -810,7 +810,7 @@ slave_sg_todev_fill_desc:
struct dw_desc *desc;
u32 len, dlen, mem;
- mem = sg_phys(sg);
+ mem = sg_dma_address(sg);
len = sg_dma_len(sg);
if (!((mem | len) & 7))
diff --git a/drivers/dma/intel_mid_dma.c b/drivers/dma/intel_mid_dma.c
index c900ca7..d0ef593 100644
--- a/drivers/dma/intel_mid_dma.c
+++ b/drivers/dma/intel_mid_dma.c
@@ -398,7 +398,7 @@ static int midc_lli_fill_sg(struct intel_mid_dma_chan *midc,
desc->width,
midc->dma->block_size);
/*Populate SAR and DAR values*/
- sg_phy_addr = sg_phys(sg);
+ sg_phy_addr = sg_dma_address(sg);
if (desc->dirn == DMA_MEM_TO_DEV) {
lli_bloc_desc->sar = sg_phy_addr;
lli_bloc_desc->dar = mids->dma_slave.dst_addr;
diff --git a/drivers/dma/pch_dma.c b/drivers/dma/pch_dma.c
index 65c0495..987ab5c 100644
--- a/drivers/dma/pch_dma.c
+++ b/drivers/dma/pch_dma.c
@@ -621,7 +621,7 @@ static struct dma_async_tx_descriptor *pd_prep_slave_sg(struct dma_chan *chan,
goto err_desc_get;
desc->regs.dev_addr = reg;
- desc->regs.mem_addr = sg_phys(sg);
+ desc->regs.mem_addr = sg_dma_address(sg);
desc->regs.size = sg_dma_len(sg);
desc->regs.next = DMA_DESC_FOLLOW_WITHOUT_IRQ;
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