diff options
| author | Simon Glass <sjg@chromium.org> | 2015-03-25 12:21:53 -0600 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2015-04-18 11:11:19 -0600 |
| commit | 2c03c4633b092d695d04bd38053da4d7dc59a9a5 (patch) | |
| tree | a9cbb4c80fbb9a902056440555e009446a63906a | |
| parent | e23eb614a415afa6bc2b3609b4f7a07c0f425744 (diff) | |
| download | u-boot-imx-2c03c4633b092d695d04bd38053da4d7dc59a9a5.zip u-boot-imx-2c03c4633b092d695d04bd38053da4d7dc59a9a5.tar.gz u-boot-imx-2c03c4633b092d695d04bd38053da4d7dc59a9a5.tar.bz2 | |
dm: core: Support allocating driver-private data for DMA
Some driver want to put DMA buffers in their private data. Add a flag
to tell driver model to align driver-private data to a cache boundary so
that DMA will work correctly in this case.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Marek Vasut <marex@denx.de>
| -rw-r--r-- | drivers/core/device.c | 19 | ||||
| -rw-r--r-- | include/dm/device.h | 3 |
2 files changed, 20 insertions, 2 deletions
diff --git a/drivers/core/device.c b/drivers/core/device.c index 7483405..1ca5d1c 100644 --- a/drivers/core/device.c +++ b/drivers/core/device.c @@ -164,6 +164,21 @@ int device_bind_by_name(struct udevice *parent, bool pre_reloc_only, -1, devp); } +static void *alloc_priv(int size, uint flags) +{ + void *priv; + + if (flags & DM_FLAG_ALLOC_PRIV_DMA) { + priv = memalign(ARCH_DMA_MINALIGN, size); + if (priv) + memset(priv, '\0', size); + } else { + priv = calloc(1, size); + } + + return priv; +} + int device_probe_child(struct udevice *dev, void *parent_priv) { struct driver *drv; @@ -182,7 +197,7 @@ int device_probe_child(struct udevice *dev, void *parent_priv) /* Allocate private data if requested */ if (drv->priv_auto_alloc_size) { - dev->priv = calloc(1, drv->priv_auto_alloc_size); + dev->priv = alloc_priv(drv->priv_auto_alloc_size, drv->flags); if (!dev->priv) { ret = -ENOMEM; goto fail; @@ -206,7 +221,7 @@ int device_probe_child(struct udevice *dev, void *parent_priv) per_child_auto_alloc_size; } if (size) { - dev->parent_priv = calloc(1, size); + dev->parent_priv = alloc_priv(size, drv->flags); if (!dev->parent_priv) { ret = -ENOMEM; goto fail; diff --git a/include/dm/device.h b/include/dm/device.h index 6980954..f27b34b 100644 --- a/include/dm/device.h +++ b/include/dm/device.h @@ -30,6 +30,9 @@ struct driver_info; /* DM is responsible for allocating and freeing parent_platdata */ #define DM_FLAG_ALLOC_PARENT_PDATA (1 << 3) +/* Allocate driver private data on a DMA boundary */ +#define DM_FLAG_ALLOC_PRIV_DMA (1 << 4) + /** * struct udevice - An instance of a driver * |