From: Viresh Kumar <viresh.kumar@st.com>
To: <vinod.koul@intel.com>, <dan.j.williams@intel.com>
Cc: <cjb@laptop.org>, <rmk+kernel@arm.linux.org.uk>,
<linus.walleij@linaro.org>, <ulf.hansson@stericsson.com>,
<linux-mmc@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<egtvedt@samfundet.no>, <hskinnemoen@gmail.com>,
<kernel@pengutronix.de>, <perex@perex.cz>,
<linux-arm-kernel@lists.infradead.org>, <armando.visconti@st.com>,
<shiraz.hashim@st.com>, <vipin.kumar@st.com>,
<rajeev-dlh.kumar@st.com>, <deepak.sikri@st.com>,
<vipulkumar.samar@st.com>, <amit.virdi@st.com>,
<viresh.kumar@st.com>, <pratyush.anand@st.com>,
<bhupesh.sharma@st.com>, <viresh.linux@gmail.com>,
<bhavna.yadav@st.com>, <vincenzo.frascino@st.com>,
<mirko.gardi@st.com>
Subject: [PATCH V3 02/12] dmaengine: Add flow controller information to dma_slave_config
Date: Wed, 1 Feb 2012 16:12:18 +0530 [thread overview]
Message-ID: <f43bb2248168c025402c897f0c67fae19b5404e8.1328091915.git.viresh.kumar@st.com> (raw)
In-Reply-To: <cover.1328091915.git.viresh.kumar@st.com>
Flow controller is programmable for few controllers and there are few
intelligent peripherals like, Synopsys JPEG controller, that needs to be a flow
controller of DMA transfers on dest side.
For this, currently two drivers, pl08x and dw_dmac, support flow controller to
be passed from platform to these drivers.
Perhaps, this should be a part of struct dma_slave_config. This patch adds
another field device_fc to this structure. User drivers must pass this as true
if they want to be flow controller of certain transfers.
Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
---
include/linux/dmaengine.h | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index 5532bb8..edfaac9 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -25,6 +25,7 @@
#include <linux/uio.h>
#include <linux/scatterlist.h>
#include <linux/bitmap.h>
+#include <linux/types.h>
#include <asm/page.h>
/**
@@ -330,6 +331,9 @@ enum dma_slave_buswidth {
* may or may not be applicable on memory sources.
* @dst_maxburst: same as src_maxburst but for destination target
* mutatis mutandis.
+ * @device_fc: Flow Controller Settings. Only valid for slave channels. Fill
+ * with 'true' if peripheral should be flow controller. Direction will be
+ * selected at Runtime.
*
* This struct is passed in as configuration data to a DMA engine
* in order to set up a certain channel for DMA transport at runtime.
@@ -356,6 +360,7 @@ struct dma_slave_config {
enum dma_slave_buswidth dst_addr_width;
u32 src_maxburst;
u32 dst_maxburst;
+ bool device_fc;
};
static inline const char *dma_chan_name(struct dma_chan *chan)
--
1.7.8.110.g4cb5d
next prev parent reply other threads:[~2012-02-01 10:53 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-01 10:42 [PATCH V3 00/12] dmaengine: Pl08x and dw_dmac updates Viresh Kumar
2012-02-01 10:42 ` [PATCH V3 01/12] dmaengine/dw_dmac: Hibernation support in dw_dmac Viresh Kumar
2012-02-01 10:42 ` Viresh Kumar [this message]
2012-02-01 10:42 ` [PATCH V3 03/12] dmaengine: Pass dma_slave_config .device_fc = NULL for all existing users Viresh Kumar
2012-02-01 10:42 ` [PATCH V3 04/12] dmaengine/amba-pl08x: Take flow controller info from DMA_SLAVE_CONFIG Viresh Kumar
2012-02-01 10:42 ` [PATCH V3 05/12] dmaengine/dw_dmac: Don't use magic number for total number of channels Viresh Kumar
2012-02-01 10:42 ` [PATCH V3 06/12] dmaengine/dw_dmac: Use dev_get_platdata() instead of accessing dev directly Viresh Kumar
2012-02-01 10:42 ` [PATCH V3 07/12] dmaengine/dw_dmac: Don't handle block interrupts Viresh Kumar
2012-02-01 10:42 ` [PATCH V3 08/12] dmaengine/dw_dmac: Unmap all memory buffers after completion of non-slave transfers Viresh Kumar
2012-02-02 12:15 ` Russell King - ARM Linux
2012-02-01 10:42 ` [PATCH V3 09/12] dmaengine/dw_dmac: Add 64 bit access width support for slave xfers on mem side Viresh Kumar
2012-02-01 10:42 ` [PATCH V3 10/12] dmaengine/dw_dmac: Add support for DMA_SLAVE_CONFIG Viresh Kumar
2012-02-01 10:42 ` [PATCH V3 11/12] dmaengine/dw_dmac: Fix dw_dmac user drivers to adapt to slave_config changes Viresh Kumar
2012-02-01 10:42 ` [PATCH V3 12/12] dmaengine/dw_dmac: Remove unused fields in struct dw_dma_slave Viresh Kumar
2012-02-22 12:51 ` [PATCH V3 00/12] dmaengine: Pl08x and dw_dmac updates Vinod Koul
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=f43bb2248168c025402c897f0c67fae19b5404e8.1328091915.git.viresh.kumar@st.com \
--to=viresh.kumar@st.com \
--cc=amit.virdi@st.com \
--cc=armando.visconti@st.com \
--cc=bhavna.yadav@st.com \
--cc=bhupesh.sharma@st.com \
--cc=cjb@laptop.org \
--cc=dan.j.williams@intel.com \
--cc=deepak.sikri@st.com \
--cc=egtvedt@samfundet.no \
--cc=hskinnemoen@gmail.com \
--cc=kernel@pengutronix.de \
--cc=linus.walleij@linaro.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mmc@vger.kernel.org \
--cc=mirko.gardi@st.com \
--cc=perex@perex.cz \
--cc=pratyush.anand@st.com \
--cc=rajeev-dlh.kumar@st.com \
--cc=rmk+kernel@arm.linux.org.uk \
--cc=shiraz.hashim@st.com \
--cc=ulf.hansson@stericsson.com \
--cc=vincenzo.frascino@st.com \
--cc=vinod.koul@intel.com \
--cc=vipin.kumar@st.com \
--cc=vipulkumar.samar@st.com \
--cc=viresh.linux@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).