diff options
Diffstat (limited to 'drivers/dma/ioatdma.c')
| -rw-r--r-- | drivers/dma/ioatdma.c | 25 |
1 files changed, 7 insertions, 18 deletions
diff --git a/drivers/dma/ioatdma.c b/drivers/dma/ioatdma.c index 5fbe56b5cea..41b18c5a314 100644 --- a/drivers/dma/ioatdma.c +++ b/drivers/dma/ioatdma.c @@ -191,17 +191,12 @@ static int ioat_dma_alloc_chan_resources(struct dma_chan *chan) int i; LIST_HEAD(tmp_list); - /* - * In-use bit automatically set by reading chanctrl - * If 0, we got it, if 1, someone else did - */ - chanctrl = readw(ioat_chan->reg_base + IOAT_CHANCTRL_OFFSET); - if (chanctrl & IOAT_CHANCTRL_CHANNEL_IN_USE) - return -EBUSY; + /* have we already been set up? */ + if (!list_empty(&ioat_chan->free_desc)) + return INITIAL_IOAT_DESC_COUNT; /* Setup register to interrupt and write completion status on error */ - chanctrl = IOAT_CHANCTRL_CHANNEL_IN_USE | - IOAT_CHANCTRL_ERR_INT_EN | + chanctrl = IOAT_CHANCTRL_ERR_INT_EN | IOAT_CHANCTRL_ANY_ERR_ABORT_EN | IOAT_CHANCTRL_ERR_COMPLETION_EN; writew(chanctrl, ioat_chan->reg_base + IOAT_CHANCTRL_OFFSET); @@ -282,11 +277,6 @@ static void ioat_dma_free_chan_resources(struct dma_chan *chan) in_use_descs - 1); ioat_chan->last_completion = ioat_chan->completion_addr = 0; - - /* Tell hw the chan is free */ - chanctrl = readw(ioat_chan->reg_base + IOAT_CHANCTRL_OFFSET); - chanctrl &= ~IOAT_CHANCTRL_CHANNEL_IN_USE; - writew(chanctrl, ioat_chan->reg_base + IOAT_CHANCTRL_OFFSET); } static struct dma_async_tx_descriptor * @@ -347,8 +337,7 @@ ioat_dma_prep_memcpy(struct dma_chan *chan, size_t len, int int_en) new->async_tx.ack = 0; /* client is in control of this ack */ new->async_tx.cookie = -EBUSY; - pci_unmap_len_set(new, src_len, orig_len); - pci_unmap_len_set(new, dst_len, orig_len); + pci_unmap_len_set(new, len, orig_len); spin_unlock_bh(&ioat_chan->desc_lock); return new ? &new->async_tx : NULL; @@ -423,11 +412,11 @@ static void ioat_dma_memcpy_cleanup(struct ioat_dma_chan *chan) */ pci_unmap_page(chan->device->pdev, pci_unmap_addr(desc, dst), - pci_unmap_len(desc, dst_len), + pci_unmap_len(desc, len), PCI_DMA_FROMDEVICE); pci_unmap_page(chan->device->pdev, pci_unmap_addr(desc, src), - pci_unmap_len(desc, src_len), + pci_unmap_len(desc, len), PCI_DMA_TODEVICE); } |