diff options
| author |   Atsushi Nemoto <anemo@mba.ocn.ne.jp> | 2009-03-06 20:07:14 +0900 |
|---|---|---|
| committer |   Dan Williams <dan.j.williams@intel.com> | 2009-03-26 09:48:09 -0700 |
| commit | 0f571515c332e00b3515dbe0859ceaa30ab66e00 (patch) | |
| tree | 6d67c555714264dda749e387cee6738f770abc5d /include/linux/dmaengine.h | |
| parent | dmatest: add dma interrupts and callbacks (diff) | |
| download | linux-dev-0f571515c332e00b3515dbe0859ceaa30ab66e00.tar.xz linux-dev-0f571515c332e00b3515dbe0859ceaa30ab66e00.zip | |
dmaengine: Add privatecnt to revert DMA_PRIVATE property
Currently dma_request_channel() set DMA_PRIVATE capability but never
clear it. So if a public channel was once grabbed by
dma_request_channel(), the device stay PRIVATE forever. Add
privatecnt member to dma_device to correctly revert it.
[lg@denx.de: fix bad usage of 'chan' in dma_async_device_register]
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Acked-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'include/linux/dmaengine.h')
| -rw-r--r-- | include/linux/dmaengine.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h index 2afc2c95e42d..2e2aa3df170c 100644 --- a/include/linux/dmaengine.h +++ b/include/linux/dmaengine.h @@ -202,6 +202,7 @@ struct dma_async_tx_descriptor { /** * struct dma_device - info on the entity supplying DMA services * @chancnt: how many DMA channels are supported + * @privatecnt: how many DMA channels are requested by dma_request_channel * @channels: the list of struct dma_chan * @global_node: list_head for global dma_device_list * @cap_mask: one or more dma_capability flags @@ -224,6 +225,7 @@ struct dma_async_tx_descriptor { struct dma_device { unsigned int chancnt; + unsigned int privatecnt; struct list_head channels; struct list_head global_node; dma_cap_mask_t cap_mask; @@ -352,6 +354,13 @@ __dma_cap_set(enum dma_transaction_type tx_type, dma_cap_mask_t *dstp) set_bit(tx_type, dstp->bits); } +#define dma_cap_clear(tx, mask) __dma_cap_clear((tx), &(mask)) +static inline void +__dma_cap_clear(enum dma_transaction_type tx_type, dma_cap_mask_t *dstp) +{ + clear_bit(tx_type, dstp->bits); +} + #define dma_cap_zero(mask) __dma_cap_zero(&(mask)) static inline void __dma_cap_zero(dma_cap_mask_t *dstp) { |