linux-kernel - [PATCH v3 0/2] dma: pl330: improve status checking

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-id: <1418208918-28127-1-git-send-email-r.baldyga@samsung.com>
Date:	Wed, 10 Dec 2014 11:55:16 +0100
From:	Robert Baldyga <r.baldyga@...sung.com>
To:	vinod.koul@...el.com
Cc:	dan.j.williams@...el.com, lars@...afoo.de,
	dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org,
	m.szyprowski@...sung.com, k.kozlowski@...sung.com,
	kyungmin.park@...sung.com, l.czerwinski@...sung.com,
	padma.kvr@...il.com, Robert Baldyga <r.baldyga@...sung.com>
Subject: [PATCH v3 0/2] dma: pl330: improve status checking

Hi,

This series allows to check DMA transfer residue (number of bytes left
to send/receive) by modifying pl330_tx_status() function, when struct
dma_tx_state is filled with needed data. It also introduces DMA_PAUSE
feature, which allows to halt DMA transfer before termination and read
residue without risk of data loss.

This features are needed for proper implementation of DMA transfers,
particulary for serial drivers when transfer sizes are unknown and
requests on DMA channels are terminated before transfer completion
very ofter (it's becouse we terminate then in timeout interrupt to
avoid latency which is usually undesirable).

Best regards,
Robert Baldyga

Changelog:

v3:
- remove double pm_runtime_put()

v2: https://lkml.org/lkml/2014/12/5/94
- add pm_runtime support
- make it working for multi-segment transfers
- some cleanups

v1: https://lkml.org/lkml/2014/11/25/554

Robert Baldyga (2):
  dma: pl330: improve pl330_tx_status() function
  dma: pl330: add DMA_PAUSE feature

 drivers/dma/pl330.c | 87 +++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 85 insertions(+), 2 deletions(-)

-- 
1.9.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/