linux.git/drivers/dma/ioat, branch v4.5

dmaengine: IOATDMA: fix timer code that continues to restart channels during idle

2016-01-30T16:59:03+00:00

The timer_event() function seems to have a bug where it ends up marking the
last entry as non-responding and eventually attempts to restart the
channel.  This also continuously happen when idle. What needs to happen is
for us to make sure there are no descriptors active and then handle that
case properly.  We should only hit the "cleanup" stage if there are still
active descriptors.

Signed-off-by: Dave Jiang 
Signed-off-by: Vinod Koul

dmaengine: ioatdma: constify dca_ops structures

2015-11-16T03:57:32+00:00

The dca_ops structure is never modified, so declare it as const.

Done with the help of Coccinelle.

Signed-off-by: Julia Lawall 
Acked-by: Dan Williams 
Signed-off-by: Vinod Koul

dmaengine: IOATDMA: Cleanup pre v3.0 chansts register reads

2015-11-16T03:40:46+00:00

Remove pre-3.0 channel status reads. 3.0 and later chansts register
is 64bit and can be read 64bit. This was clarified with the hardware
architects and since the driver now only support 3.0+ we don't need the
legacy support

Signed-off-by: Dave Jiang 
Signed-off-by: Vinod Koul

dmaengine: ioatdma: add PCIe AER handlers

2015-09-21T15:40:05+00:00

Adding AER handlers in order to handle any PCIe errors.

Signed-off-by: Dave Jiang 
Signed-off-by: Vinod Koul

dmaengine: ioatdma: adding shutdown support

2015-09-21T15:40:05+00:00

The ioatdma needs to be queisced and block all additional op submission
during reboots. When NET_DMA was used, this caused issue as ops were still
being sent to ioatdma during reboots even though PCI BME has been turned
off. Even though NET_DMA has been deprecated, we need to prevent similar
situations. The shutdown handler should address that.

Signed-off-by: Dave Jiang 
Signed-off-by: Vinod Koul

dmaengine: ioatdma: add Broadwell EP ioatdma PCI dev IDs

2015-08-28T04:36:06+00:00

Adding the Broadwell Xeon ioatdma PCI device IDs and
related bits. This is still IOATDMA 3.2 based hw.

Signed-off-by: Dave Jiang 
Signed-off-by: Vinod Koul

dmaengine: ioatdma: Fix variable array length

2015-08-26T02:23:58+00:00

Sparse reported:
drivers/dma/ioat/prep.c:637:27: sparse: Variable length array is used.

Assigning a static value for the array.

Signed-off-by: Dave Jiang 
Signed-off-by: Vinod Koul

dmaengine: ioatdma: fix sparse "error" with prep lock

2015-08-26T02:23:58+00:00

The prep lock gets acquired in ioat_check_space_lock and released in
ioat_tx_submit_unlock. Setting the annotations so sparse does not freak out.

drivers/dma/ioat/dma.c:273:30: sparse: context imbalance in 'ioat_tx_submit_unlock' - unexpected unlock
drivers/dma/ioat/dma.c:476:5: sparse: context imbalance in 'ioat_check_space_lock' - wrong count at exit

Signed-off-by: Dave Jiang 
Signed-off-by: Vinod Koul

dmaengine: ioatdma: fix coccinelle warning

2015-08-21T08:34:24+00:00

Simplifying the end return. This existed in the original code but was
flagged when refactoring of the code made it appear it's new.

coccinelle warnings: (new ones prefixed by >>)

>> drivers/dma/ioat/init.c:1018:1-3: WARNING: end returns can be simpified

Signed-off-by: Dave Jiang 
Signed-off-by: Vinod Koul

dmaengine: ioatdma: Clean up IOAT_COMPLETION_PENDING flag

2015-08-17T08:07:31+00:00

IOAT_COMPLETION_PENDING flag was deprecated for v2 and v3 drivers but was
not cleaned up. Doing that now. The commit deprecated this flag was
4dec23d7 ioatdma: fix race between updating ioat->head and
IOAT_COMPLETION_PENDING.

Signed-off-by: Dave Jiang 
Signed-off-by: Vinod Koul