From: Alexander Gordeev <a.gordeev.box@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: Alexander Gordeev <a.gordeev.box@gmail.com>,
Michael Chen <micchen@altera.com>,
devel@driverdev.osuosl.org, dmaengine@vger.kernel.org
Subject: [PATCH RFC 0/2] staging: Support Avalon-MM DMA Interface for PCIe
Date: Thu, 19 Sep 2019 11:59:11 +0200 [thread overview]
Message-ID: <cover.1568817357.git.a.gordeev.box@gmail.com> (raw)
The Avalon-MM DMA Interface for PCIe is a design found in hard IPs for
Intel Arria, Cyclone or Stratix FPGAs. It transfers data between on-chip
memory and system memory. This RFC is an attempt to provide a generic API:
typedef void (*avalon_dma_xfer_callback)(void *dma_async_param);
int avalon_dma_submit_xfer(
struct avalon_dma *avalon_dma,
enum dma_data_direction direction,
dma_addr_t dev_addr, dma_addr_t host_addr,
unsigned int size,
avalon_dma_xfer_callback callback,
void *callback_param);
int avalon_dma_submit_xfer_sg(struct avalon_dma *avalon_dma,
enum dma_data_direction direction,
dma_addr_t dev_addr,
struct sg_table *sg_table,
avalon_dma_xfer_callback callback,
void *callback_param);
int avalon_dma_issue_pending(struct avalon_dma *avalon_dma);
Patch 1 introduces "avalon-dma" driver that provides the above-mentioned
generic interface.
Patch 2 adds "avalon-drv" driver using "avalon-dma" to transfer user-
provided data. This driver was used to debug and stress "avalon-dma"
and could be used as a code base for other implementations. Strictly
speaking, it does not need to be part of the kernel tree.
A companion tool using "avalon-drv" to DMA files (not part of this
patchset) is located at git@github.com:a-gordeev/avalon-drv-tool.git
The suggested interface is developed with the standard "dmaengine"
in mind and could be reworked to suit it. I would appreciate, however
gathering some feedback on the implemenation first - as the hardware-
specific code would persist. It is also a call for testing - I only
have access to a single Arria 10 device to try on.
This series is against v5.3 and could be found at
git@github.com:a-gordeev/linux.git avalon-dma-engine
CC: Michael Chen <micchen@altera.com>
CC: devel@driverdev.osuosl.org
CC: dmaengine@vger.kernel.org
Alexander Gordeev (2):
staging: avalon-dma: Avalon DMA engine
staging: avalon-drv: Avalon DMA driver
drivers/staging/Kconfig | 4 +
drivers/staging/Makefile | 2 +
drivers/staging/avalon-dma/Kconfig | 45 ++
drivers/staging/avalon-dma/Makefile | 11 +
drivers/staging/avalon-dma/avalon-dma-core.c | 515 ++++++++++++++
drivers/staging/avalon-dma/avalon-dma-core.h | 52 ++
.../staging/avalon-dma/avalon-dma-interrupt.c | 118 ++++
.../staging/avalon-dma/avalon-dma-interrupt.h | 13 +
drivers/staging/avalon-dma/avalon-dma-util.c | 196 ++++++
drivers/staging/avalon-dma/avalon-dma-util.h | 25 +
drivers/staging/avalon-drv/Kconfig | 34 +
drivers/staging/avalon-drv/Makefile | 14 +
drivers/staging/avalon-drv/avalon-drv-dev.c | 193 ++++++
drivers/staging/avalon-drv/avalon-drv-ioctl.c | 137 ++++
drivers/staging/avalon-drv/avalon-drv-ioctl.h | 12 +
drivers/staging/avalon-drv/avalon-drv-mmap.c | 93 +++
drivers/staging/avalon-drv/avalon-drv-mmap.h | 12 +
.../staging/avalon-drv/avalon-drv-sg-buf.c | 132 ++++
.../staging/avalon-drv/avalon-drv-sg-buf.h | 26 +
drivers/staging/avalon-drv/avalon-drv-util.c | 54 ++
drivers/staging/avalon-drv/avalon-drv-util.h | 12 +
drivers/staging/avalon-drv/avalon-drv-xfer.c | 655 ++++++++++++++++++
drivers/staging/avalon-drv/avalon-drv-xfer.h | 24 +
drivers/staging/avalon-drv/avalon-drv.h | 22 +
include/linux/avalon-dma-hw.h | 72 ++
include/linux/avalon-dma.h | 68 ++
include/uapi/linux/avalon-drv-ioctl.h | 30 +
27 files changed, 2571 insertions(+)
create mode 100644 drivers/staging/avalon-dma/Kconfig
create mode 100644 drivers/staging/avalon-dma/Makefile
create mode 100644 drivers/staging/avalon-dma/avalon-dma-core.c
create mode 100644 drivers/staging/avalon-dma/avalon-dma-core.h
create mode 100644 drivers/staging/avalon-dma/avalon-dma-interrupt.c
create mode 100644 drivers/staging/avalon-dma/avalon-dma-interrupt.h
create mode 100644 drivers/staging/avalon-dma/avalon-dma-util.c
create mode 100644 drivers/staging/avalon-dma/avalon-dma-util.h
create mode 100644 drivers/staging/avalon-drv/Kconfig
create mode 100644 drivers/staging/avalon-drv/Makefile
create mode 100644 drivers/staging/avalon-drv/avalon-drv-dev.c
create mode 100644 drivers/staging/avalon-drv/avalon-drv-ioctl.c
create mode 100644 drivers/staging/avalon-drv/avalon-drv-ioctl.h
create mode 100644 drivers/staging/avalon-drv/avalon-drv-mmap.c
create mode 100644 drivers/staging/avalon-drv/avalon-drv-mmap.h
create mode 100644 drivers/staging/avalon-drv/avalon-drv-sg-buf.c
create mode 100644 drivers/staging/avalon-drv/avalon-drv-sg-buf.h
create mode 100644 drivers/staging/avalon-drv/avalon-drv-util.c
create mode 100644 drivers/staging/avalon-drv/avalon-drv-util.h
create mode 100644 drivers/staging/avalon-drv/avalon-drv-xfer.c
create mode 100644 drivers/staging/avalon-drv/avalon-drv-xfer.h
create mode 100644 drivers/staging/avalon-drv/avalon-drv.h
create mode 100644 include/linux/avalon-dma-hw.h
create mode 100644 include/linux/avalon-dma.h
create mode 100644 include/uapi/linux/avalon-drv-ioctl.h
--
2.22.0
next reply other threads:[~2019-09-19 9:59 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-19 9:59 Alexander Gordeev [this message]
2019-09-19 9:59 ` [PATCH RFC 1/2] staging: avalon-dma: Avalon DMA engine Alexander Gordeev
2019-09-19 9:59 ` [PATCH RFC 2/2] staging: avalon-drv: Avalon DMA driver Alexander Gordeev
2019-09-19 11:37 ` [PATCH RFC 0/2] staging: Support Avalon-MM DMA Interface for PCIe Greg KH
2019-09-19 17:12 ` Vinod Koul
2019-10-09 10:17 ` Alexander Gordeev
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