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Date: Wed, 22 Aug 2018 12:20:42 +0000
From: Manish Narani <MNARANI@...inx.com>
To: Borislav Petkov <bp@...en8.de>
CC: "robh+dt@...nel.org" <robh+dt@...nel.org>,
"mark.rutland@....com" <mark.rutland@....com>,
"catalin.marinas@....com" <catalin.marinas@....com>,
"will.deacon@....com" <will.deacon@....com>,
Michal Simek <michals@...inx.com>,
"mchehab@...nel.org" <mchehab@...nel.org>,
"mdf@...nel.org" <mdf@...nel.org>,
Edgar Iglesias <edgari@...inx.com>,
Shubhrajyoti Datta <shubhraj@...inx.com>,
Naga Sureshkumar Relli <nagasure@...inx.com>,
Bharat Kumar Gogada <bharatku@...inx.com>,
"stefan.krsmanovic@...ios.com" <stefan.krsmanovic@...ios.com>,
Srinivas Goud <sgoud@...inx.com>,
Anirudha Sarangi <anirudh@...inx.com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>
Subject: RE: [PATCH v4 1/4] edac: synps: Add platform specific structures for
ddrc controller
Hi Boris,
Thank you so much for the review.
> -----Original Message-----
> From: Borislav Petkov [mailto:bp@...en8.de]
> Sent: Tuesday, August 21, 2018 6:37 PM
> To: Manish Narani <MNARANI@...inx.com>
> Cc: robh+dt@...nel.org; mark.rutland@....com; catalin.marinas@....com;
> will.deacon@....com; Michal Simek <michals@...inx.com>;
> mchehab@...nel.org; mdf@...nel.org; Edgar Iglesias <edgari@...inx.com>;
> Shubhrajyoti Datta <shubhraj@...inx.com>; Naga Sureshkumar Relli
> <nagasure@...inx.com>; Bharat Kumar Gogada <bharatku@...inx.com>;
> stefan.krsmanovic@...ios.com; Srinivas Goud <sgoud@...inx.com>; Anirudha
> Sarangi <anirudh@...inx.com>; linux-kernel@...r.kernel.org;
> devicetree@...r.kernel.org; linux-arm-kernel@...ts.infradead.org; linux-
> edac@...r.kernel.org
> Subject: Re: [PATCH v4 1/4] edac: synps: Add platform specific structures for
> ddrc controller
>
> On Sat, Aug 04, 2018 at 02:55:32PM +0530, Manish Narani wrote:
> > Add platform specific structures, so that we can add different IP
> > support later using quirks.
> >
> > Signed-off-by: Manish Narani <manish.narani@...inx.com>
> > ---
> > drivers/edac/synopsys_edac.c | 83
> > ++++++++++++++++++++++++++++++++++----------
> > 1 file changed, 65 insertions(+), 18 deletions(-)
> >
> > diff --git a/drivers/edac/synopsys_edac.c
> > b/drivers/edac/synopsys_edac.c index 0c9c59e..b3c54e7 100644
> > --- a/drivers/edac/synopsys_edac.c
> > +++ b/drivers/edac/synopsys_edac.c
> > @@ -22,6 +22,7 @@
> > #include <linux/edac.h>
> > #include <linux/module.h>
> > #include <linux/platform_device.h>
> > +#include <linux/of.h>
> >
> > #include "edac_module.h"
> >
> > @@ -130,6 +131,7 @@ struct synps_ecc_status {
> > * @baseaddr: Base address of the DDR controller
> > * @message: Buffer for framing the event specific info
> > * @stat: ECC status information
> > + * @p_data: Pointer to platform data
> > * @ce_cnt: Correctable Error count
> > * @ue_cnt: Uncorrectable Error count
> > */
> > @@ -137,24 +139,47 @@ struct synps_edac_priv {
> > void __iomem *baseaddr;
> > char message[SYNPS_EDAC_MSG_SIZE];
> > struct synps_ecc_status stat;
> > + const struct synps_platform_data *p_data;
> > u32 ce_cnt;
> > u32 ue_cnt;
> > };
> >
> > /**
> > + * struct synps_platform_data - synps platform data structure
> > + * @edac_geterror_info: function pointer to synps edac error info
> > + * @edac_get_mtype: function pointer to synps edac mtype
> > + * @edac_get_dtype: function pointer to synps edac dtype
> > + * @edac_get_eccstate: function pointer to synps edac eccstate
> > + * @quirks: to differentiate IPs
> > + */
> > +struct synps_platform_data {
> > + int (*edac_geterror_info)(struct synps_edac_priv *priv);
> > + enum mem_type (*edac_get_mtype)(const void __iomem *base);
> > + enum dev_type (*edac_get_dtype)(const void __iomem *base);
> > + bool (*edac_get_eccstate)(void __iomem *base);
> > + int quirks;
> > +};
> > +
> > +/**
> > * synps_edac_geterror_info - Get the current ecc error info
> > - * @base: Pointer to the base address of the ddr memory controller
> > - * @p: Pointer to the synopsys ecc status structure
> > + * @priv: Pointer to DDR memory controller private instance data
> > *
> > * Determines there is any ecc error or not
> > *
> > * Return: one if there is no error otherwise returns zero
> > */
> > -static int synps_edac_geterror_info(void __iomem *base,
> > - struct synps_ecc_status *p)
> > +static int synps_edac_geterror_info(struct synps_edac_priv *priv)
> > {
> > + void __iomem *base;
> > + struct synps_ecc_status *p;
> > u32 regval, clearval = 0;
> >
> > + if (!priv)
> > + return 1;
> > +
> > + base = priv->baseaddr;
> > + p = &priv->stat;
> > +
> > regval = readl(base + STAT_OFST);
> > if (!regval)
> > return 1;
> > @@ -240,9 +265,10 @@ static void synps_edac_handle_error(struct
> > mem_ctl_info *mci, static void synps_edac_check(struct mem_ctl_info
> > *mci) {
> > struct synps_edac_priv *priv = mci->pvt_info;
> > + const struct synps_platform_data *p_data = priv->p_data;
> > int status;
> >
> > - status = synps_edac_geterror_info(priv->baseaddr, &priv->stat);
> > + status = p_data->edac_geterror_info(priv);
> > if (status)
> > return;
> >
> > @@ -362,6 +388,7 @@ static int synps_edac_init_csrows(struct
> mem_ctl_info *mci)
> > struct csrow_info *csi;
> > struct dimm_info *dimm;
> > struct synps_edac_priv *priv = mci->pvt_info;
> > + const struct synps_platform_data *p_data = priv->p_data;
> > u32 size;
> > int row, j;
> >
> > @@ -370,12 +397,13 @@ static int synps_edac_init_csrows(struct
> mem_ctl_info *mci)
> > size = synps_edac_get_memsize();
> >
> > for (j = 0; j < csi->nr_channels; j++) {
> > - dimm = csi->channels[j]->dimm;
> > + dimm = csi->channels[j]->dimm;
> > dimm->edac_mode = EDAC_FLAG_SECDED;
> > - dimm->mtype = synps_edac_get_mtype(priv-
> >baseaddr);
> > - dimm->nr_pages = (size >> PAGE_SHIFT) / csi-
> >nr_channels;
> > - dimm->grain = SYNPS_EDAC_ERR_GRAIN;
> > - dimm->dtype = synps_edac_get_dtype(priv-
> >baseaddr);
> > + dimm->mtype = p_data->edac_get_mtype(priv-
> >baseaddr);
> > + dimm->nr_pages = (size >> PAGE_SHIFT) /
> > + csi->nr_channels;
>
> Why do you have to break that line? Just let it stick out.[]
Okay. I will update this in v5.
>
> And why can't you keep the nice vertical alignment on the '=' signs for better
> readability?
Okay. This will bring checkpatch warning (above 80 lines), but for better readability, I will update this in v5.
>
> > + dimm->grain = SYNPS_EDAC_ERR_GRAIN;
> > + dimm->dtype = p_data->edac_get_dtype(priv-
> >baseaddr);
> > }
> > }
> >
> > @@ -423,6 +451,21 @@ static int synps_edac_mc_init(struct mem_ctl_info
> *mci,
> > return status;
> > }
> >
> > +static const struct synps_platform_data zynq_edac_def = {
> > + .edac_geterror_info = synps_edac_geterror_info,
> > + .edac_get_mtype = synps_edac_get_mtype,
> > + .edac_get_dtype = synps_edac_get_dtype,
> > + .edac_get_eccstate = synps_edac_get_eccstate,
> > + .quirks = 0,
>
> ... like you've done here, for example.
>
> > +};
> > +
> > +static const struct of_device_id synps_edac_match[] = {
> > + { .compatible = "xlnx,zynq-ddrc-a05", .data = (void *)&zynq_edac_def },
> > + { /* end of table */ }
> > +};
> > +
> > +MODULE_DEVICE_TABLE(of, synps_edac_match);
> > +
> > /**
> > * synps_edac_mc_probe - Check controller and bind driver
> > * @pdev: Pointer to the platform_device struct
> > @@ -440,13 +483,22 @@ static int synps_edac_mc_probe(struct
> platform_device *pdev)
> > int rc;
> > struct resource *res;
> > void __iomem *baseaddr;
> > + const struct of_device_id *match;
> > + const struct synps_platform_data *p_data;
> >
> > res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > baseaddr = devm_ioremap_resource(&pdev->dev, res);
> > if (IS_ERR(baseaddr))
> > return PTR_ERR(baseaddr);
> >
> > - if (!synps_edac_get_eccstate(baseaddr)) {
> > + match = of_match_node(synps_edac_match, pdev->dev.of_node);
> > + if (!match && !match->data) {
> > + dev_err(&pdev->dev, "of_match_node() failed\n");
>
> That error message is not really helpful.
Okay. I will update that part of code.
Thanks,
Manish Narani
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