dma: mv_xor: remove the pool_size from platform_data
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 <thomas.petazzoni@free-electrons.com>
diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c
index fc983bf..ec741b4 100644
--- a/drivers/dma/mv_xor.c
+++ b/drivers/dma/mv_xor.c
@@ -603,7 +603,7 @@
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 @@
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 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 @@
* 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 @@
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 @@
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;
diff --git a/drivers/dma/mv_xor.h b/drivers/dma/mv_xor.h
index dab9f30..698b448 100644
--- a/drivers/dma/mv_xor.h
+++ b/drivers/dma/mv_xor.h
@@ -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