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fsldma: implement a private tx_list 

Drop fsldma's use of tx_list from struct dma_async_tx_descriptor in
preparation for removal of this field.

Cc: Li Yang <leoli@freescale.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams 2009-09-08 17:53:02 -07:00
parent e0bd0f8cb0
commit eda3423457
2 changed files with 10 additions and 7 deletions
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16
drivers/dma/fsldma.c
View File

@ -326,7 +326,8 @@ static void fsl_chan_toggle_ext_start(struct fsl_dma_chan *fsl_chan, int enable)
static dma_cookie_t fsl_dma_tx_submit(struct dma_async_tx_descriptor *tx)
{
struct fsl_dma_chan *fsl_chan = to_fsl_chan(tx->chan);
struct fsl_desc_sw *desc;
struct fsl_desc_sw *desc = tx_to_fsl_desc(tx);
struct fsl_desc_sw *child;
unsigned long flags;
dma_cookie_t cookie;
@ -334,7 +335,7 @@ static dma_cookie_t fsl_dma_tx_submit(struct dma_async_tx_descriptor *tx)
spin_lock_irqsave(&fsl_chan->desc_lock, flags);
cookie = fsl_chan->common.cookie;
list_for_each_entry(desc, &tx->tx_list, node) {
list_for_each_entry(child, &desc->tx_list, node) {
cookie++;
if (cookie < 0)
cookie = 1;
@ -343,8 +344,8 @@ static dma_cookie_t fsl_dma_tx_submit(struct dma_async_tx_descriptor *tx)
}
fsl_chan->common.cookie = cookie;
append_ld_queue(fsl_chan, tx_to_fsl_desc(tx));
list_splice_init(&tx->tx_list, fsl_chan->ld_queue.prev);
append_ld_queue(fsl_chan, desc);
list_splice_init(&desc->tx_list, fsl_chan->ld_queue.prev);
spin_unlock_irqrestore(&fsl_chan->desc_lock, flags);
@ -366,6 +367,7 @@ static struct fsl_desc_sw *fsl_dma_alloc_descriptor(
desc_sw = dma_pool_alloc(fsl_chan->desc_pool, GFP_ATOMIC, &pdesc);
if (desc_sw) {
memset(desc_sw, 0, sizeof(struct fsl_desc_sw));
INIT_LIST_HEAD(&desc_sw->tx_list);
dma_async_tx_descriptor_init(&desc_sw->async_tx,
&fsl_chan->common);
desc_sw->async_tx.tx_submit = fsl_dma_tx_submit;
@ -455,7 +457,7 @@ fsl_dma_prep_interrupt(struct dma_chan *chan, unsigned long flags)
new->async_tx.flags = flags;
/* Insert the link descriptor to the LD ring */
list_add_tail(&new->node, &new->async_tx.tx_list);
list_add_tail(&new->node, &new->tx_list);
/* Set End-of-link to the last link descriptor of new list*/
set_ld_eol(fsl_chan, new);
@ -513,7 +515,7 @@ static struct dma_async_tx_descriptor *fsl_dma_prep_memcpy(
dma_dest += copy;
/* Insert the link descriptor to the LD ring */
list_add_tail(&new->node, &first->async_tx.tx_list);
list_add_tail(&new->node, &first->tx_list);
} while (len);
new->async_tx.flags = flags; /* client is in control of this ack */
@ -528,7 +530,7 @@ fail:
if (!first)
return NULL;
list = &first->async_tx.tx_list;
list = &first->tx_list;
list_for_each_entry_safe_reverse(new, prev, list, node) {
list_del(&new->node);
dma_pool_free(fsl_chan->desc_pool, new, new->async_tx.phys);

1
drivers/dma/fsldma.h
View File

@ -90,6 +90,7 @@ struct fsl_dma_ld_hw {
struct fsl_desc_sw {
struct fsl_dma_ld_hw hw;
struct list_head node;
struct list_head tx_list;
struct dma_async_tx_descriptor async_tx;
struct list_head *ld;
void *priv;