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Date: Wed, 1 Apr 2020 14:32:58 +0000
From: Sherry Sun <sherry.sun@....com>
To: Robert Richter <rrichter@...vell.com>
CC: "bp@...en8.de" <bp@...en8.de>,
"mchehab@...nel.org" <mchehab@...nel.org>,
"tony.luck@...el.com" <tony.luck@...el.com>,
"james.morse@....com" <james.morse@....com>,
"michal.simek@...inx.com" <michal.simek@...inx.com>,
"manish.narani@...inx.com" <manish.narani@...inx.com>,
"linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Frank Li <frank.li@....com>
Subject: RE: [PATCH v2 4/4] EDAC: synopsys: Add useful debug and output
information for 64bit systems
Hi Robert,
> -----Original Message-----
> From: Robert Richter <rrichter@...vell.com>
> Sent: 2020年4月1日 18:57
> To: Sherry Sun <sherry.sun@....com>
> Cc: bp@...en8.de; mchehab@...nel.org; tony.luck@...el.com;
> james.morse@....com; michal.simek@...inx.com;
> manish.narani@...inx.com; linux-edac@...r.kernel.org; linux-
> kernel@...r.kernel.org; Frank Li <frank.li@....com>
> Subject: Re: [PATCH v2 4/4] EDAC: synopsys: Add useful debug and output
> information for 64bit systems
>
> On 01.04.20 15:39:09, Sherry Sun wrote:
> > Now the synopsys_edac driver only support to output the 32-bit error
> > data, but for 64 bit systems, such as i.MX8MP, 64 bit error data is
> > needed. At the same time, when CE/UE happens, syndrome data is also
> > useful to showed to user. So here add data_high and syndrome data for
> > 64-bit systems.
> >
> > And in order to distinguish 64-bit systems and other systems, here
> > adjust the position of the zynqmp_get_dtype(), so we can called this
> > function to distinguish it. To ensure that functions of the same
> > function are in the same position, here adjust the position of the
> > zynq_get_dtype() too.
> >
> > Signed-off-by: Sherry Sun <sherry.sun@....com>
> > ---
> > drivers/edac/synopsys_edac.c | 182
> > ++++++++++++++++++++---------------
> > 1 file changed, 102 insertions(+), 80 deletions(-)
> >
> > diff --git a/drivers/edac/synopsys_edac.c
> > b/drivers/edac/synopsys_edac.c index bf4202a24683..e8c3631ddff4
> 100644
> > --- a/drivers/edac/synopsys_edac.c
> > +++ b/drivers/edac/synopsys_edac.c
> > @@ -278,18 +278,22 @@
> > * @col: Column number.
> > * @bank: Bank number.
> > * @bitpos: Bit position.
> > - * @data: Data causing the error.
> > + * @data_low: Low bit data causing the error.
> > + * @data_high: High bit data causing the error(used for 64 bit
> systems).
> > * @bankgrpnr: Bank group number.
> > * @blknr: Block number.
> > + * @syndrome: Syndrome of the error.
> > */
> > struct ecc_error_info {
> > u32 row;
> > u32 col;
> > u32 bank;
> > u32 bitpos;
> > - u32 data;
> > + u32 data_low;
> > + u32 data_high;
>
> Where are 16, 32 and 64 bit widths. You could handle them all the same in a
> u64.
>
> If I am not wrong, the width is fix for the whole mci. So you could create
> various .get_error_info() functions depending on the data width without run
> time width checks.
>
Yes, here we can use u64. Will correct it in v3.
For the zynq, it's 16-bit bus width, for imx8mp, it's 64-bit bus width.
But for zynqmp, it's optional between 32-bit and 64-bit bus width,
So we had better run time check the bus width, what do you think?
> > u32 bankgrpnr;
> > u32 blknr;
> > + u32 syndrome;
> > };
> >
> > /**
>
> > @@ -399,7 +467,7 @@ static int zynq_get_error_info(struct
> synps_edac_priv *priv)
> > p->ueinfo.row = (regval & ADDR_ROW_MASK) >> ADDR_ROW_SHIFT;
> > p->ueinfo.col = regval & ADDR_COL_MASK;
> > p->ueinfo.bank = (regval & ADDR_BANK_MASK) >>
> ADDR_BANK_SHIFT;
> > - p->ueinfo.data = readl(base + UE_DATA_31_0_OFST);
> > + p->ueinfo.data_low = readl(base + UE_DATA_31_0_OFST);
> > clearval |= ECC_CTRL_CLR_UE_ERR;
> >
> > out:
> > @@ -443,10 +511,14 @@ static int zynqmp_get_error_info(struct
> synps_edac_priv *priv)
> > p->ceinfo.bankgrpnr = (regval &
> ECC_CEADDR1_BNKGRP_MASK) >>
> > ECC_CEADDR1_BNKGRP_SHIFT;
> > p->ceinfo.blknr = (regval & ECC_CEADDR1_BLKNR_MASK);
> > - p->ceinfo.data = readl(base + ECC_CSYND0_OFST);
> > - edac_dbg(2, "ECCCSYN0: 0x%08X ECCCSYN1: 0x%08X ECCCSYN2:
> 0x%08X\n",
> > - readl(base + ECC_CSYND0_OFST), readl(base +
> ECC_CSYND1_OFST),
> > - readl(base + ECC_CSYND2_OFST));
> > + p->ceinfo.data_low = readl(base + ECC_CSYND0_OFST);
> > + if (zynqmp_get_dtype(base) == DEV_X8) {
> > + p->ceinfo.data_high = readl(base + ECC_CSYND1_OFST);
> > + p->ceinfo.syndrome = readl(base + ECC_CSYND2_OFST);
> > + edac_dbg(2, "CE data_low: 0x%08X data_high: 0x%08X
> syndrome: 0x%08X\n",
> > + p->ceinfo.data_low, p->ceinfo.data_high,
> > + p->ceinfo.syndrome);
>
> You are loosing edac_dbg() here for the != DEV_X8 cases.
>
> > + }
> > ue_err:
> > if (!p->ue_cnt)
> > goto out;
> > @@ -459,7 +531,14 @@ static int zynqmp_get_error_info(struct
> synps_edac_priv *priv)
> > p->ueinfo.bank = (regval & ECC_CEADDR1_BNKNR_MASK) >>
> > ECC_CEADDR1_BNKNR_SHIFT;
> > p->ueinfo.blknr = (regval & ECC_CEADDR1_BLKNR_MASK);
> > - p->ueinfo.data = readl(base + ECC_UESYND0_OFST);
> > + p->ueinfo.data_low = readl(base + ECC_UESYND0_OFST);
> > + if (zynqmp_get_dtype(base) == DEV_X8) {
> > + p->ueinfo.data_high = readl(base + ECC_UESYND1_OFST);
> > + p->ueinfo.syndrome = readl(base + ECC_UESYND2_OFST);
> > + edac_dbg(2, "UE data_low: 0x%08X data_high: 0x%08X
> syndrome: 0x%08X\n",
> > + p->ueinfo.data_low, p->ueinfo.data_high,
> > + p->ueinfo.syndrome);
>
> Similar here, no edac_dbg() for != DEV_X8.
Thanks, will correct it in v3.
>
> > + }
> > out:
> > clearval = ECC_CTRL_CLR_CE_ERR | ECC_CTRL_CLR_CE_ERRCNT;
> > clearval |= ECC_CTRL_CLR_UE_ERR | ECC_CTRL_CLR_UE_ERRCNT;
> @@ -480,20
> > +559,27 @@ static void handle_error(struct mem_ctl_info *mci, struct
> > synps_ecc_status *p) {
> > struct synps_edac_priv *priv = mci->pvt_info;
> > struct ecc_error_info *pinf;
> > + int n;
> >
> > if (p->ce_cnt) {
> > pinf = &p->ceinfo;
> > if (priv->p_data->quirks & DDR_ECC_INTR_SUPPORT) {
> > - snprintf(priv->message, SYNPS_EDAC_MSG_SIZE,
> > - "DDR ECC error type:%s Row %d Bank %d
> BankGroup Number %d Block Number %d Bit Position: %d Data: 0x%08x",
> > - "CE", pinf->row, pinf->bank,
> > - pinf->bankgrpnr, pinf->blknr,
> > - pinf->bitpos, pinf->data);
> > + n = snprintf(priv->message, SYNPS_EDAC_MSG_SIZE,
> > + "DDR ECC error type:%s Row %d Bank %d
> BankGroup Number %d Block Number %d Bit Position: %d Data: 0x%08x",
> > + "CE", pinf->row, pinf->bank,
> > + pinf->bankgrpnr, pinf->blknr,
> > + pinf->bitpos, pinf->data_low);
> > +
> > + if (zynqmp_get_dtype(priv->baseaddr) == DEV_X8)
>
> This is zynqmp specific, right? but you call it in the generic function
> handle_error().
Yes, although handle_error() is a generic function,
but this operation is checked by priv->p_data->quirks,
so here is zynqmp and imx8mp specific.
Best regards
Sherry Sun
>
> -Robert
>
> > + snprintf(priv->message + n,
> > + SYNPS_EDAC_MSG_SIZE - n,
> > + " Data_high: 0x%08x Syndrome:
> 0x%08x",
> > + pinf->data_high, pinf->syndrome);
> > } else {
> > snprintf(priv->message, SYNPS_EDAC_MSG_SIZE,
> > "DDR ECC error type:%s Row %d Bank %d
> Col %d Bit Position: %d Data: 0x%08x",
> > "CE", pinf->row, pinf->bank, pinf->col,
> > - pinf->bitpos, pinf->data);
> > + pinf->bitpos, pinf->data_low);
> > }
> >
> > edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci,
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