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dma: mv_xor: remove the pool_size from platform_data

Browse source 
The pool_size is always PAGE_SIZE, and since it is a software
configuration paramter (and not a hardware description parameter), we
cannot make it part of the Device Tree binding, so we'd better remove
it from the platform_data as well.

Signed-off-by: Thomas Petazzoni <[email protected]>
This commit is contained in:
Thomas Petazzoni 2012-11-15 15:55:30 +01:00
commit b503fa0199
4 changed files with 9 additions and 26 deletions
Download patch file Download diff file Expand all files Collapse all files

15
drivers/dma/mv_xor.c
View file

@ -603,7 +603,7 @@ static int mv_xor_alloc_chan_resources(struct dma_chan *chan)
int idx;
struct mv_xor_chan *mv_chan = to_mv_xor_chan(chan);
struct mv_xor_desc_slot *slot = NULL;
int num_descs_in_pool = mv_chan->pool_size/MV_XOR_SLOT_SIZE;
int num_descs_in_pool = MV_XOR_POOL_SIZE/MV_XOR_SLOT_SIZE;
/* Allocate descriptor slots */
idx = mv_chan->slots_allocated;
@ -1074,7 +1074,7 @@ static int mv_xor_channel_remove(struct mv_xor_chan *mv_chan)
dma_async_device_unregister(&mv_chan->dmadev);
dma_free_coherent(dev, mv_chan->pool_size,
dma_free_coherent(dev, MV_XOR_POOL_SIZE,
mv_chan->dma_desc_pool_virt, mv_chan->dma_desc_pool);
list_for_each_entry_safe(chan, _chan, &mv_chan->dmadev.channels,
@ -1088,8 +1088,7 @@ static int mv_xor_channel_remove(struct mv_xor_chan *mv_chan)
static struct mv_xor_chan *
mv_xor_channel_add(struct mv_xor_device *xordev,
struct platform_device *pdev,
int idx, dma_cap_mask_t cap_mask,
size_t pool_size, int irq)
int idx, dma_cap_mask_t cap_mask, int irq)
{
int ret = 0;
struct mv_xor_chan *mv_chan;
@ -1109,9 +1108,8 @@ mv_xor_channel_add(struct mv_xor_device *xordev,
* note: writecombine gives slightly better performance, but
* requires that we explicitly flush the writes
*/
mv_chan->pool_size = pool_size;
mv_chan->dma_desc_pool_virt =
dma_alloc_writecombine(&pdev->dev, mv_chan->pool_size,
dma_alloc_writecombine(&pdev->dev, MV_XOR_POOL_SIZE,
&mv_chan->dma_desc_pool, GFP_KERNEL);
if (!mv_chan->dma_desc_pool_virt)
return ERR_PTR(-ENOMEM);
@ -1193,7 +1191,7 @@ mv_xor_channel_add(struct mv_xor_device *xordev,
return mv_chan;
err_free_dma:
dma_free_coherent(&pdev->dev, pool_size,
dma_free_coherent(&pdev->dev, MV_XOR_POOL_SIZE,
mv_chan->dma_desc_pool_virt, mv_chan->dma_desc_pool);
return ERR_PTR(ret);
}
@ -1296,8 +1294,7 @@ static int mv_xor_probe(struct platform_device *pdev)
xordev->channels[i] =
mv_xor_channel_add(xordev, pdev, i,
cd->cap_mask,
cd->pool_size, irq);
cd->cap_mask, irq);
if (IS_ERR(xordev->channels[i])) {
ret = PTR_ERR(xordev->channels[i]);
goto err_channel_add;

1
drivers/dma/mv_xor.h
View file

@ -24,6 +24,7 @@
#include <linux/interrupt.h>
#define USE_TIMER
#define MV_XOR_POOL_SIZE PAGE_SIZE
#define MV_XOR_SLOT_SIZE 64
#define MV_XOR_THRESHOLD 1
#define MV_XOR_MAX_CHANNELS 2