diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2007-07-09 11:56:42 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2007-07-13 08:06:13 -0700 |
| commit | d379b01e9087a582d58f4b678208a4f8d8376fe7 (patch) | |
| tree | 155920bca93c18afba66b9d5acfecd359d5bec65 /drivers/dma/ioatdma.c | |
| parent | 7405f74badf46b5d023c5d2b670b4471525f6c91 (diff) | |
dmaengine: make clients responsible for managing channels
The current implementation assumes that a channel will only be used by one
client at a time. In order to enable channel sharing the dmaengine core is
changed to a model where clients subscribe to channel-available-events.
Instead of tracking how many channels a client wants and how many it has
received the core just broadcasts the available channels and lets the
clients optionally take a reference. The core learns about the clients'
needs at dma_event_callback time.
In support of multiple operation types, clients can specify a capability
mask to only be notified of channels that satisfy a certain set of
capabilities.
Changelog:
* removed DMA_TX_ARRAY_INIT, no longer needed
* dma_client_chan_free -> dma_chan_release: switch to global reference
counting only at device unregistration time, before it was also happening
at client unregistration time
* clients now return dma_state_client to dmaengine (ack, dup, nak)
* checkpatch.pl fixes
* fixup merge with git-ioat
Cc: Chris Leech <christopher.leech@intel.com>
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/dma/ioatdma.c')
| -rw-r--r-- | drivers/dma/ioatdma.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/dma/ioatdma.c b/drivers/dma/ioatdma.c index 17104493028..81810b3042f 100644 --- a/drivers/dma/ioatdma.c +++ b/drivers/dma/ioatdma.c @@ -72,7 +72,6 @@ static int enumerate_dma_channels(struct ioat_device *device) INIT_LIST_HEAD(&ioat_chan->used_desc); /* This should be made common somewhere in dmaengine.c */ ioat_chan->common.device = &device->common; - ioat_chan->common.client = NULL; list_add_tail(&ioat_chan->common.device_node, &device->common.channels); } |