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Date: Fri, 18 Aug 2017 11:06:38 +0800
From: Wu Hao <hao.wu@...el.com>
To: Moritz Fischer <moritz.fischer@...us.com>
Cc: Alan Tull <atull@...nel.org>, linux-fpga@...r.kernel.org,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
linux-api@...r.kernel.org, "Kang, Luwei" <luwei.kang@...el.com>,
"Zhang, Yi Z" <yi.z.zhang@...el.com>,
Tim Whisonant <tim.whisonant@...el.com>,
Enno Luebbers <enno.luebbers@...el.com>,
Shiva Rao <shiva.rao@...el.com>,
Christopher Rauer <christopher.rauer@...el.com>
Subject: Re: [PATCH v2 16/22] fpga: intel: add fpga bridge platform driver
for FME
On Thu, Aug 17, 2017 at 12:55:37PM -0700, Moritz Fischer wrote:
> Hi Wu,
>
> looks good. Minor nits inline.
Hi Moritz,
Thanks for your comments. : )
>
> On Sun, Jun 25, 2017 at 6:52 PM, Wu Hao <hao.wu@...el.com> wrote:
> > This patch adds fpga bridge platform driver for Intel FPGA Management
> > Engine. It implements the enable_set call back for fpga bridge.
> >
> > Signed-off-by: Tim Whisonant <tim.whisonant@...el.com>
> > Signed-off-by: Enno Luebbers <enno.luebbers@...el.com>
> > Signed-off-by: Shiva Rao <shiva.rao@...el.com>
> > Signed-off-by: Christopher Rauer <christopher.rauer@...el.com>
> > Signed-off-by: Wu Hao <hao.wu@...el.com>
>
> Reviewed-by: Moritz Fischer <mdf@...nel.org> (With fixes below)
> > ---
> > drivers/fpga/Kconfig | 7 ++++
> > drivers/fpga/Makefile | 1 +
> > drivers/fpga/intel-fpga-fme-br.c | 77 ++++++++++++++++++++++++++++++++++++++++
> > 3 files changed, 85 insertions(+)
> > create mode 100644 drivers/fpga/intel-fpga-fme-br.c
> >
> > diff --git a/drivers/fpga/Kconfig b/drivers/fpga/Kconfig
> > index 6f2f623..05e2a8e 100644
> > --- a/drivers/fpga/Kconfig
> > +++ b/drivers/fpga/Kconfig
> > @@ -158,6 +158,13 @@ config INTEL_FPGA_FME_MGR
> > Say Y to enable FPGA Manager driver for Intel FPGA Management
> > Engine.
> >
> > +config INTEL_FPGA_FME_BRIDGE
> > + tristate "Intel FPGA FME Bridge Driver"
> > + depends on INTEL_FPGA_FME && FPGA_BRIDGE
> > + help
> > + Say Y to enable FPGA Bridge driver for Intel FPGA Management
> > + Engine.
> > +
> > endif
> >
> > endif # FPGA
> > diff --git a/drivers/fpga/Makefile b/drivers/fpga/Makefile
> > index d1d588b..131c105 100644
> > --- a/drivers/fpga/Makefile
> > +++ b/drivers/fpga/Makefile
> > @@ -32,6 +32,7 @@ obj-$(CONFIG_OF_FPGA_REGION) += of-fpga-region.o
> > obj-$(CONFIG_INTEL_FPGA_PCI) += intel-fpga-pci.o
> > obj-$(CONFIG_INTEL_FPGA_FME) += intel-fpga-fme.o
> > obj-$(CONFIG_INTEL_FPGA_FME_MGR) += intel-fpga-fme-mgr.o
> > +obj-$(CONFIG_INTEL_FPGA_FME_BRIDGE) += intel-fpga-fme-br.o
> >
> > intel-fpga-pci-objs := intel-pcie.o intel-feature-dev.o
> > intel-fpga-fme-objs := intel-fme-main.o intel-fme-pr.o
> > diff --git a/drivers/fpga/intel-fpga-fme-br.c b/drivers/fpga/intel-fpga-fme-br.c
> > new file mode 100644
> > index 0000000..9b922d2
> > --- /dev/null
> > +++ b/drivers/fpga/intel-fpga-fme-br.c
> > @@ -0,0 +1,77 @@
> > +/*
> > + * FPGA Bridge Driver for Intel FPGA Management Engine (FME)
> > + *
> > + * Copyright (C) 2017 Intel Corporation, Inc.
> > + *
> > + * Authors:
> > + * Wu Hao <hao.wu@...el.com>
> > + * Joseph Grecco <joe.grecco@...el.com>
> > + * Enno Luebbers <enno.luebbers@...el.com>
> > + * Tim Whisonant <tim.whisonant@...el.com>
> > + * Ananda Ravuri <ananda.ravuri@...el.com>
> > + * Henry Mitchel <henry.mitchel@...el.com>
> > + *
> > + * This work is licensed under the terms of the GNU GPL version 2. See
> > + * the COPYING file in the top-level directory.
>
> Could replace that with SPDX-Licence-Identifier: GPL-2.0
Sure, I will update the header like this. : )
* This work is licensed under the terms of the GNU GPL version 2.
* SPDX-License-Identifier: GPL-2.0
*/
> > + */
> > +
> > +#include <linux/module.h>
> > +#include <linux/fpga/fpga-bridge.h>
> > +
> > +#include "intel-feature-dev.h"
> > +#include "intel-fme.h"
> > +
> > +static int fme_bridge_enable_set(struct fpga_bridge *bridge, bool enable)
> > +{
> > + struct fme_br_pdata *pdata = bridge->priv;
> > + int ret = 0;
> > +
> > + if (enable)
> > + fpga_port_enable(pdata->port);
> > + else
> > + ret = fpga_port_disable(pdata->port);
> > +
> > + return ret;
> > +}
> > +
> > +static const struct fpga_bridge_ops fme_bridge_ops = {
> > + .enable_set = fme_bridge_enable_set,
> > +};
> > +
> > +static int fme_br_probe(struct platform_device *pdev)
> > +{
> > + struct device *dev = &pdev->dev;
> > + struct fme_br_pdata *pdata = dev_get_platdata(dev);
> > + int ret;
> > +
> > + ret = fpga_bridge_register(dev, "Intel FPGA FME Bridge",
> > + &fme_bridge_ops, pdata);
> > + if (ret)
> > + dev_err(dev, "unable to register FPGA Bridge\n");
> > +
> > + dev_dbg(dev, "Intel FME FPGA Bridge probed\n");
>
> Mixed signals here. Did it work or did it not. Either return early,
> in case of error. Or get rid of dev_dbg().
Agree, will remove this dev_dbg. As fpga_bridge_register will print
some message using dev_info if success.
Thanks
Hao
> > +
> > + return ret;
> > +}
> > +
> > +static int fme_br_remove(struct platform_device *pdev)
> > +{
> > + fpga_bridge_unregister(&pdev->dev);
> > +
> > + return 0;
> > +}
> > +
> > +static struct platform_driver fme_br_driver = {
> > + .driver = {
> > + .name = INTEL_FPGA_FME_BRIDGE,
> > + },
> > + .probe = fme_br_probe,
> > + .remove = fme_br_remove,
> > +};
> > +
> > +module_platform_driver(fme_br_driver);
> > +
> > +MODULE_DESCRIPTION("FPGA Bridge for Intel FPGA Management Engine");
> > +MODULE_AUTHOR("Intel Corporation");
> > +MODULE_LICENSE("GPL v2");
> > +MODULE_ALIAS("platform:intel-fpga-fme-bridge");
> > --
> > 1.8.3.1
> >
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-fpga" in
> > the body of a message to majordomo@...r.kernel.org
> > More majordomo info at http://vger.kernel.org/majordomo-info.html
>
> Thanks,
>
> Moritz
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