This series adds support for polling async transactions for completion even if interrupts are disabled and transactions can complete out of order. Prior to this series, dma_cookie_t was a monotonically increasing integer and cookies could be compared to one another to determine if earlier operations had completed (up until the cookie wraps around, then it would break). Now, cookies are treated as opaque handles. The series also does some API clean up and documents how dma_cookie_t should behave. This closes out by adding support for .device_tx_status() to the idxd driver and then reverting the DMA_OUT_OF_ORDER patch that previously allowed idxd to opt-out of support for polling, which I think is a nice overall simplification to the dmaengine API. Changes since version 4: - Rebased - Removed updates to the various drivers that call dma_async_is_tx_complete. These clean ups will be spun off into a separate patch series since they need acks from other maintainers. Changes since version 3: - Fixed Message-Id in emails. Sorry they were all stripped! Won't happen again. Changes since version 2: - None. Rebased as requested without conflict. Changes since version 1: - Broke up the change to remove dma_async_is_tx_complete into a single patch for each driver - Renamed dma_async_is_tx_complete to dmaengine_async_is_tx_complete. Ben Walker (7): dmaengine: Remove dma_async_is_complete from client API dmaengine: Move dma_set_tx_state to the provider API header dmaengine: Add dmaengine_async_is_tx_complete dmaengine: Add provider documentation on cookie assignment dmaengine: idxd: idxd_desc.id is now a u16 dmaengine: idxd: Support device_tx_status dmaengine: Revert "cookie bypass for out of order completion" Documentation/driver-api/dmaengine/client.rst | 24 ++---- .../driver-api/dmaengine/provider.rst | 64 ++++++++------ drivers/dma/dmaengine.c | 2 +- drivers/dma/dmaengine.h | 21 ++++- drivers/dma/dmatest.c | 14 +-- drivers/dma/idxd/device.c | 1 + drivers/dma/idxd/dma.c | 86 ++++++++++++++++++- drivers/dma/idxd/idxd.h | 3 +- include/linux/dmaengine.h | 43 +++------- 9 files changed, 164 insertions(+), 94 deletions(-) -- 2.37.1
