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Date: Wed, 2 Nov 2022 10:09:02 +0100
From: Horatiu Vultur <horatiu.vultur@...rochip.com>
To: Raju Lakkaraju <Raju.Lakkaraju@...rochip.com>
CC: <netdev@...r.kernel.org>, <davem@...emloft.net>, <kuba@...nel.org>,
<linux-kernel@...r.kernel.org>, <bryan.whitehead@...rochip.com>,
<pabeni@...hat.com>, <edumazet@...gle.com>, <olteanv@...il.com>,
<linux@...linux.org.uk>, <UNGLinuxDriver@...rochip.com>,
<andrew@...n.ch>, <Ian.Saturley@...rochip.com>
Subject: Re: [PATCH net-next V5] net: lan743x: Add support to SGMII register
dump for PCI11010/PCI11414 chips
The 11/02/2022 14:16, Raju Lakkaraju wrote:
> > > +static void lan743x_sgmii_regs(struct net_device *dev, void *p)
> > > +{
> > > + struct lan743x_adapter *adp = netdev_priv(dev);
> > > + u32 *rb = p;
> > > + u16 idx;
> > > + int val;
> > > + struct {
> > > + u8 id;
> > > + u8 dev;
> > > + u16 addr;
> > > + } regs[] = {
> > > + { ETH_SR_VSMMD_DEV_ID1, MDIO_MMD_VEND1, 0x0002},
> > > + { ETH_SR_VSMMD_DEV_ID2, MDIO_MMD_VEND1, 0x0003},
> > > + { ETH_SR_VSMMD_PCS_ID1, MDIO_MMD_VEND1, 0x0004},
> > > + { ETH_SR_VSMMD_PCS_ID2, MDIO_MMD_VEND1, 0x0005},
> > > + { ETH_SR_VSMMD_STS, MDIO_MMD_VEND1, 0x0008},
> > > + { ETH_SR_VSMMD_CTRL, MDIO_MMD_VEND1, 0x0009},
> > > + { ETH_SR_MII_CTRL, MDIO_MMD_VEND2, 0x0000},
> > > + { ETH_SR_MII_STS, MDIO_MMD_VEND2, 0x0001},
> > > + { ETH_SR_MII_DEV_ID1, MDIO_MMD_VEND2, 0x0002},
> > > + { ETH_SR_MII_DEV_ID2, MDIO_MMD_VEND2, 0x0003},
> > > + { ETH_SR_MII_AN_ADV, MDIO_MMD_VEND2, 0x0004},
> > > + { ETH_SR_MII_LP_BABL, MDIO_MMD_VEND2, 0x0005},
> > > + { ETH_SR_MII_EXPN, MDIO_MMD_VEND2, 0x0006},
> > > + { ETH_SR_MII_EXT_STS, MDIO_MMD_VEND2, 0x000F},
> > > + { ETH_SR_MII_TIME_SYNC_ABL, MDIO_MMD_VEND2, 0x0708},
> > > + { ETH_SR_MII_TIME_SYNC_TX_MAX_DLY_LWR, MDIO_MMD_VEND2, 0x0709},
> > > + { ETH_SR_MII_TIME_SYNC_TX_MAX_DLY_UPR, MDIO_MMD_VEND2, 0x070A},
> > > + { ETH_SR_MII_TIME_SYNC_TX_MIN_DLY_LWR, MDIO_MMD_VEND2, 0x070B},
> > > + { ETH_SR_MII_TIME_SYNC_TX_MIN_DLY_UPR, MDIO_MMD_VEND2, 0x070C},
> > > + { ETH_SR_MII_TIME_SYNC_RX_MAX_DLY_LWR, MDIO_MMD_VEND2, 0x070D},
> > > + { ETH_SR_MII_TIME_SYNC_RX_MAX_DLY_UPR, MDIO_MMD_VEND2, 0x070E},
> > > + { ETH_SR_MII_TIME_SYNC_RX_MIN_DLY_LWR, MDIO_MMD_VEND2, 0x070F},
> > > + { ETH_SR_MII_TIME_SYNC_RX_MIN_DLY_UPR, MDIO_MMD_VEND2, 0x0710},
> > > + { ETH_VR_MII_DIG_CTRL1, MDIO_MMD_VEND2, 0x8000},
> > > + { ETH_VR_MII_AN_CTRL, MDIO_MMD_VEND2, 0x8001},
> > > + { ETH_VR_MII_AN_INTR_STS, MDIO_MMD_VEND2, 0x8002},
> > > + { ETH_VR_MII_TC, MDIO_MMD_VEND2, 0x8003},
> > > + { ETH_VR_MII_DBG_CTRL, MDIO_MMD_VEND2, 0x8005},
> > > + { ETH_VR_MII_EEE_MCTRL0, MDIO_MMD_VEND2, 0x8006},
> > > + { ETH_VR_MII_EEE_TXTIMER, MDIO_MMD_VEND2, 0x8008},
> > > + { ETH_VR_MII_EEE_RXTIMER, MDIO_MMD_VEND2, 0x8009},
> > > + { ETH_VR_MII_LINK_TIMER_CTRL, MDIO_MMD_VEND2, 0x800A},
> > > + { ETH_VR_MII_EEE_MCTRL1, MDIO_MMD_VEND2, 0x800B},
> > > + { ETH_VR_MII_DIG_STS, MDIO_MMD_VEND2, 0x8010},
> > > + { ETH_VR_MII_ICG_ERRCNT1, MDIO_MMD_VEND2, 0x8011},
> > > + { ETH_VR_MII_GPIO, MDIO_MMD_VEND2, 0x8015},
> > > + { ETH_VR_MII_EEE_LPI_STATUS, MDIO_MMD_VEND2, 0x8016},
> > > + { ETH_VR_MII_EEE_WKERR, MDIO_MMD_VEND2, 0x8017},
> > > + { ETH_VR_MII_MISC_STS, MDIO_MMD_VEND2, 0x8018},
> > > + { ETH_VR_MII_RX_LSTS, MDIO_MMD_VEND2, 0x8020},
> > > + { ETH_VR_MII_GEN2_GEN4_TX_BSTCTRL0, MDIO_MMD_VEND2, 0x8038},
> > > + { ETH_VR_MII_GEN2_GEN4_TX_LVLCTRL0, MDIO_MMD_VEND2, 0x803A},
> > > + { ETH_VR_MII_GEN2_GEN4_TXGENCTRL0, MDIO_MMD_VEND2, 0x803C},
> > > + { ETH_VR_MII_GEN2_GEN4_TXGENCTRL1, MDIO_MMD_VEND2, 0x803D},
> > > + { ETH_VR_MII_GEN4_TXGENCTRL2, MDIO_MMD_VEND2, 0x803E},
> > > + { ETH_VR_MII_GEN2_GEN4_TX_STS, MDIO_MMD_VEND2, 0x8048},
> > > + { ETH_VR_MII_GEN2_GEN4_RXGENCTRL0, MDIO_MMD_VEND2, 0x8058},
> > > + { ETH_VR_MII_GEN2_GEN4_RXGENCTRL1, MDIO_MMD_VEND2, 0x8059},
> > > + { ETH_VR_MII_GEN4_RXEQ_CTRL, MDIO_MMD_VEND2, 0x805B},
> > > + { ETH_VR_MII_GEN4_RXLOS_CTRL0, MDIO_MMD_VEND2, 0x805D},
> > > + { ETH_VR_MII_GEN2_GEN4_MPLL_CTRL0, MDIO_MMD_VEND2, 0x8078},
> > > + { ETH_VR_MII_GEN2_GEN4_MPLL_CTRL1, MDIO_MMD_VEND2, 0x8079},
> > > + { ETH_VR_MII_GEN2_GEN4_MPLL_STS, MDIO_MMD_VEND2, 0x8088},
> > > + { ETH_VR_MII_GEN2_GEN4_LVL_CTRL, MDIO_MMD_VEND2, 0x8090},
> > > + { ETH_VR_MII_GEN4_MISC_CTRL2, MDIO_MMD_VEND2, 0x8093},
> > > + { ETH_VR_MII_GEN2_GEN4_MISC_CTRL0, MDIO_MMD_VEND2, 0x8099},
> > > + { ETH_VR_MII_GEN2_GEN4_MISC_CTRL1, MDIO_MMD_VEND2, 0x809A},
> > > + { ETH_VR_MII_SNPS_CR_CTRL, MDIO_MMD_VEND2, 0x80A0},
> > > + { ETH_VR_MII_SNPS_CR_ADDR, MDIO_MMD_VEND2, 0x80A1},
> > > + { ETH_VR_MII_SNPS_CR_DATA, MDIO_MMD_VEND2, 0x80A2},
> > > + { ETH_VR_MII_DIG_CTRL2, MDIO_MMD_VEND2, 0x80E1},
> > > + { ETH_VR_MII_DIG_ERRCNT, MDIO_MMD_VEND2, 0x80E2},
> > > + };
> > > +
> > > + for (idx = 0; idx < ARRAY_SIZE(regs) / sizeof(regs[0]); idx++) {
> >
> > Is this correct?
>
> Yes.
>
> > You have 62 entries but you go only over the first 15. Or am I
> > misunderstood something?
>
> Your ethtool application don't have SGMII register dump register
> definitions.
> Once This patch accept by Linux community, I will submit ethtool application
> changes to "Ethtool development community".
>
> For your reference, Please find the attached file
> (sgmii_sgmii_regdump_cmd.txt).
I don't think this has anything to do with ethtool.
Your array has 64 entries and the for loop goes from 0 to 15. So it
doesn't read all the registers. Of course ethtool will dump all the
registers but only first 15 might have a value different than 0. After
that all of them will be 0 regardless if in the HW is a different value.
> >
> > > + val = lan743x_sgmii_read(adp, regs[idx].dev, regs[idx].addr);
> > > + if (val < 0)
> > > + rb[regs[idx].id] = 0xFFFF;
> > > + else
> > > + rb[regs[idx].id] = val;
> > > + }
> > > +}
> > > +
--
/Horatiu
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