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authorDan Williams <dan.j.williams@intel.com>2009-07-28 14:44:04 -0700
committerDan Williams <dan.j.williams@intel.com>2009-09-08 17:29:55 -0700
commitc7984f4e4e3af3bf8027d636283ea8658c7f80b9 (patch)
tree81fb1adc44173505d447aa93142cc96a4bf03044 /drivers/dma/ioat/dma.c
parent77867fff033ea549096c49d863c564ad7d8be36f (diff)
ioat: define descriptor control bit-field
This cleans up a mess of and'ing and or'ing bit definitions, and allows simple assignments from the specified dma_ctrl_flags parameter. Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/dma/ioat/dma.c')
-rw-r--r--drivers/dma/ioat/dma.c28
1 files changed, 16 insertions, 12 deletions
diff --git a/drivers/dma/ioat/dma.c b/drivers/dma/ioat/dma.c
index b7508041c6d..4840d4805d8 100644
--- a/drivers/dma/ioat/dma.c
+++ b/drivers/dma/ioat/dma.c
@@ -472,9 +472,9 @@ static dma_cookie_t ioat1_tx_submit(struct dma_async_tx_descriptor *tx)
return -ENOMEM;
}
- hw->ctl = IOAT_DMA_DESCRIPTOR_CTL_CP_STS;
+ hw->ctl_f.compl_write = 1;
if (first->txd.callback) {
- hw->ctl |= IOAT_DMA_DESCRIPTOR_CTL_INT_GN;
+ hw->ctl_f.int_en = 1;
if (first != new) {
/* move callback into to last desc */
new->txd.callback = first->txd.callback;
@@ -563,9 +563,9 @@ static dma_cookie_t ioat2_tx_submit(struct dma_async_tx_descriptor *tx)
return -ENOMEM;
}
- hw->ctl |= IOAT_DMA_DESCRIPTOR_CTL_CP_STS;
+ hw->ctl_f.compl_write = 1;
if (first->txd.callback) {
- hw->ctl |= IOAT_DMA_DESCRIPTOR_CTL_INT_GN;
+ hw->ctl_f.int_en = 1;
if (first != new) {
/* move callback into to last desc */
new->txd.callback = first->txd.callback;
@@ -878,7 +878,8 @@ ioat2_dma_get_next_descriptor(struct ioat_dma_chan *ioat_chan)
noop_desc = to_ioat_desc(ioat_chan->used_desc.next);
/* set size to non-zero value (channel returns error when size is 0) */
noop_desc->hw->size = NULL_DESC_BUFFER_SIZE;
- noop_desc->hw->ctl = IOAT_DMA_DESCRIPTOR_NUL;
+ noop_desc->hw->ctl = 0;
+ noop_desc->hw->ctl_f.null = 1;
noop_desc->hw->src_addr = 0;
noop_desc->hw->dst_addr = 0;
@@ -1230,6 +1231,7 @@ ioat_dma_is_complete(struct dma_chan *chan, dma_cookie_t cookie,
static void ioat_dma_start_null_desc(struct ioat_dma_chan *ioat_chan)
{
struct ioat_desc_sw *desc;
+ struct ioat_dma_descriptor *hw;
spin_lock_bh(&ioat_chan->desc_lock);
@@ -1242,17 +1244,19 @@ static void ioat_dma_start_null_desc(struct ioat_dma_chan *ioat_chan)
return;
}
- desc->hw->ctl = IOAT_DMA_DESCRIPTOR_NUL
- | IOAT_DMA_DESCRIPTOR_CTL_INT_GN
- | IOAT_DMA_DESCRIPTOR_CTL_CP_STS;
+ hw = desc->hw;
+ hw->ctl = 0;
+ hw->ctl_f.null = 1;
+ hw->ctl_f.int_en = 1;
+ hw->ctl_f.compl_write = 1;
/* set size to non-zero value (channel returns error when size is 0) */
- desc->hw->size = NULL_DESC_BUFFER_SIZE;
- desc->hw->src_addr = 0;
- desc->hw->dst_addr = 0;
+ hw->size = NULL_DESC_BUFFER_SIZE;
+ hw->src_addr = 0;
+ hw->dst_addr = 0;
async_tx_ack(&desc->txd);
switch (ioat_chan->device->version) {
case IOAT_VER_1_2:
- desc->hw->next = 0;
+ hw->next = 0;
list_add_tail(&desc->node, &ioat_chan->used_desc);
writel(((u64) desc->txd.phys) & 0x00000000FFFFFFFF,