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dma: mv_xor: do not use pool_size from platform_data within the driver

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The driver currently pokes into the platform_data structure during its
normal operation to get the pool_size value. Poking into the
platform_data structure is not nice when moving to the Device Tree, so
this commit adds a new pool_size field in the mv_xor_device structure,
which gets initialized at ->probe() time. The driver then uses this
field instead of the platform_data.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Thomas Petazzoni 2012-10-29 16:27:34 +01:00
parent a3fc74bc9b
commit 09f2b7864c
2 changed files with 5 additions and 6 deletions
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10
drivers/dma/mv_xor.c
View file

@ -604,9 +604,7 @@ 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;
struct mv_xor_platform_data *plat_data =
mv_chan->device->pdev->dev.platform_data;
int num_descs_in_pool = plat_data->pool_size/MV_XOR_SLOT_SIZE;
int num_descs_in_pool = mv_chan->device->pool_size/MV_XOR_SLOT_SIZE;
/* Allocate descriptor slots */
idx = mv_chan->slots_allocated;
@ -1084,11 +1082,10 @@ static int __devexit mv_xor_remove(struct platform_device *dev)
struct mv_xor_device *device = platform_get_drvdata(dev);
struct dma_chan *chan, *_chan;
struct mv_xor_chan *mv_chan;
struct mv_xor_platform_data *plat_data = dev->dev.platform_data;
dma_async_device_unregister(&device->common);
dma_free_coherent(&dev->dev, plat_data->pool_size,
dma_free_coherent(&dev->dev, device->pool_size,
device->dma_desc_pool_virt, device->dma_desc_pool);
list_for_each_entry_safe(chan, _chan, &device->common.channels,
@ -1120,8 +1117,9 @@ static int __devinit mv_xor_probe(struct platform_device *pdev)
* note: writecombine gives slightly better performance, but
* requires that we explicitly flush the writes
*/
adev->pool_size = plat_data->pool_size;
adev->dma_desc_pool_virt = dma_alloc_writecombine(&pdev->dev,
plat_data->pool_size,
adev->pool_size,
&adev->dma_desc_pool,
GFP_KERNEL);
if (!adev->dma_desc_pool_virt)

1
drivers/dma/mv_xor.h
View file

@ -72,6 +72,7 @@ struct mv_xor_device {
int id;
dma_addr_t dma_desc_pool;
void *dma_desc_pool_virt;
size_t pool_size;
struct dma_device common;
struct mv_xor_shared_private *shared;
};