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txx9dmac: implement a private tx_list

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Drop txx9dmac's use of tx_list from struct dma_async_tx_descriptor in
preparation for removal of this field.

Cc: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams 2009-09-08 17:53:03 -07:00
parent 285a3c7164
commit 1979b186b8
2 changed files with 12 additions and 13 deletions
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24
drivers/dma/txx9dmac.c
View file

@ -180,9 +180,8 @@ static struct txx9dmac_desc *txx9dmac_first_queued(struct txx9dmac_chan *dc)
static struct txx9dmac_desc *txx9dmac_last_child(struct txx9dmac_desc *desc)
{
if (!list_empty(&desc->txd.tx_list))
desc = list_entry(desc->txd.tx_list.prev,
struct txx9dmac_desc, desc_node);
if (!list_empty(&desc->tx_list))
desc = list_entry(desc->tx_list.prev, typeof(*desc), desc_node);
return desc;
}
@ -197,6 +196,7 @@ static struct txx9dmac_desc *txx9dmac_desc_alloc(struct txx9dmac_chan *dc,
desc = kzalloc(sizeof(*desc), flags);
if (!desc)
return NULL;
INIT_LIST_HEAD(&desc->tx_list);
dma_async_tx_descriptor_init(&desc->txd, &dc->chan);
desc->txd.tx_submit = txx9dmac_tx_submit;
/* txd.flags will be overwritten in prep funcs */
@ -245,7 +245,7 @@ static void txx9dmac_sync_desc_for_cpu(struct txx9dmac_chan *dc,
struct txx9dmac_dev *ddev = dc->ddev;
struct txx9dmac_desc *child;
list_for_each_entry(child, &desc->txd.tx_list, desc_node)
list_for_each_entry(child, &desc->tx_list, desc_node)
dma_sync_single_for_cpu(chan2parent(&dc->chan),
child->txd.phys, ddev->descsize,
DMA_TO_DEVICE);
@ -267,11 +267,11 @@ static void txx9dmac_desc_put(struct txx9dmac_chan *dc,
txx9dmac_sync_desc_for_cpu(dc, desc);
spin_lock_bh(&dc->lock);
list_for_each_entry(child, &desc->txd.tx_list, desc_node)
list_for_each_entry(child, &desc->tx_list, desc_node)
dev_vdbg(chan2dev(&dc->chan),
"moving child desc %p to freelist\n",
child);
list_splice_init(&desc->txd.tx_list, &dc->free_list);
list_splice_init(&desc->tx_list, &dc->free_list);
dev_vdbg(chan2dev(&dc->chan), "moving desc %p to freelist\n",
desc);
list_add(&desc->desc_node, &dc->free_list);
@ -429,7 +429,7 @@ txx9dmac_descriptor_complete(struct txx9dmac_chan *dc,
param = txd->callback_param;
txx9dmac_sync_desc_for_cpu(dc, desc);
list_splice_init(&txd->tx_list, &dc->free_list);
list_splice_init(&desc->tx_list, &dc->free_list);
list_move(&desc->desc_node, &dc->free_list);
if (!ds) {
@ -571,7 +571,7 @@ static void txx9dmac_handle_error(struct txx9dmac_chan *dc, u32 csr)
"Bad descriptor submitted for DMA! (cookie: %d)\n",
bad_desc->txd.cookie);
txx9dmac_dump_desc(dc, &bad_desc->hwdesc);
list_for_each_entry(child, &bad_desc->txd.tx_list, desc_node)
list_for_each_entry(child, &bad_desc->tx_list, desc_node)
txx9dmac_dump_desc(dc, &child->hwdesc);
/* Pretend the descriptor completed successfully */
txx9dmac_descriptor_complete(dc, bad_desc);
@ -613,7 +613,7 @@ static void txx9dmac_scan_descriptors(struct txx9dmac_chan *dc)
return;
}
list_for_each_entry(child, &desc->txd.tx_list, desc_node)
list_for_each_entry(child, &desc->tx_list, desc_node)
if (desc_read_CHAR(dc, child) == chain) {
/* Currently in progress */
if (csr & TXX9_DMA_CSR_ABCHC)
@ -823,8 +823,7 @@ txx9dmac_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
dma_sync_single_for_device(chan2parent(&dc->chan),
prev->txd.phys, ddev->descsize,
DMA_TO_DEVICE);
list_add_tail(&desc->desc_node,
&first->txd.tx_list);
list_add_tail(&desc->desc_node, &first->tx_list);
}
prev = desc;
}
@ -919,8 +918,7 @@ txx9dmac_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
prev->txd.phys,
ddev->descsize,
DMA_TO_DEVICE);
list_add_tail(&desc->desc_node,
&first->txd.tx_list);
list_add_tail(&desc->desc_node, &first->tx_list);
}
prev = desc;
}

1
drivers/dma/txx9dmac.h
View file

@ -231,6 +231,7 @@ struct txx9dmac_desc {
/* THEN values for driver housekeeping */
struct list_head desc_node ____cacheline_aligned;
struct list_head tx_list;
struct dma_async_tx_descriptor txd;
size_t len;
};