| Message ID | 20160803135647.23242-3-niklas.soderlund+renesas@ragnatech.se (mailing list archive) |
|---|---|
| State | Accepted |
| Delegated to: | Geert Uytterhoeven |
| Headers | show |
From: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> Date: Wed, 3 Aug 2016 15:56:47 +0200 > The interface would not function after the system had been woken up > after have been suspended (echo mem > /sys/power/state) cycle. The > reason for this is that all device registers have been reset to its > default values. This patch adds sleep suspend and resume functions that > detached the interface at suspend and restore the registers and reattach > the interface at resume. > > Only the registers that are only configured at probe time needs to be > explicitly restored by the resume handler. All other registers are > reconfigured by either reopening the device in the resume handler (if > the device was running when the system was suspended) or when the > interface is opened by a user at a later time. > > Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> Applied to net-next, thanks.
Hello. On 8/3/2016 4:56 PM, Niklas Söderlund wrote: > The interface would not function after the system had been woken up > after have been suspended (echo mem > /sys/power/state) cycle. The > reason for this is that all device registers have been reset to its > default values. This patch adds sleep suspend and resume functions that > detached the interface at suspend and restore the registers and reattach > the interface at resume. > > Only the registers that are only configured at probe time needs to be > explicitly restored by the resume handler. All other registers are > reconfigured by either reopening the device in the resume handler (if > the device was running when the system was suspended) or when the > interface is opened by a user at a later time. > > Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> > --- > drivers/net/ethernet/renesas/ravb_main.c | 72 ++++++++++++++++++++++++++++---- > 1 file changed, 64 insertions(+), 8 deletions(-) > > diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c > index da8da86..1de55c9 100644 > --- a/drivers/net/ethernet/renesas/ravb_main.c > +++ b/drivers/net/ethernet/renesas/ravb_main.c [...] > @@ -2111,6 +2166,7 @@ static int ravb_runtime_nop(struct device *dev) > } > > static const struct dev_pm_ops ravb_dev_pm_ops = { > + SET_SYSTEM_SLEEP_PM_OPS(ravb_runtime_suspend, ravb_runtime_resume) Why in the world you used runtime_ in the usual suspend/resume method names?! Since DaveM have already taken the patch, please send a follow-up patch to remove that infix. > SET_RUNTIME_PM_OPS(ravb_runtime_nop, ravb_runtime_nop, NULL) > }; > MBR, Sergei
Hello. On 8/10/2016 2:16 AM, David Miller wrote: >> The interface would not function after the system had been woken up >> after have been suspended (echo mem > /sys/power/state) cycle. The >> reason for this is that all device registers have been reset to its >> default values. This patch adds sleep suspend and resume functions that >> detached the interface at suspend and restore the registers and reattach >> the interface at resume. >> >> Only the registers that are only configured at probe time needs to be >> explicitly restored by the resume handler. All other registers are >> reconfigured by either reopening the device in the resume handler (if >> the device was running when the system was suspended) or when the >> interface is opened by a user at a later time. >> >> Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> > > Applied to net-next, thanks. Ugh, I should have reviewed the patch earlier -- I was postponing this until I have the time to test it... Since the patch did have some visible issues, it should've been recast before applying. DaveM, please in the future could you ping me before merging? MBR, Sergei
On 2016-08-10 13:40:51 +0300, Sergei Shtylyov wrote: > Hello. > > On 8/3/2016 4:56 PM, Niklas Söderlund wrote: > > > The interface would not function after the system had been woken up > > after have been suspended (echo mem > /sys/power/state) cycle. The > > reason for this is that all device registers have been reset to its > > default values. This patch adds sleep suspend and resume functions that > > detached the interface at suspend and restore the registers and reattach > > the interface at resume. > > > > Only the registers that are only configured at probe time needs to be > > explicitly restored by the resume handler. All other registers are > > reconfigured by either reopening the device in the resume handler (if > > the device was running when the system was suspended) or when the > > interface is opened by a user at a later time. > > > > Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> > > --- > > drivers/net/ethernet/renesas/ravb_main.c | 72 ++++++++++++++++++++++++++++---- > > 1 file changed, 64 insertions(+), 8 deletions(-) > > > > diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c > > index da8da86..1de55c9 100644 > > --- a/drivers/net/ethernet/renesas/ravb_main.c > > +++ b/drivers/net/ethernet/renesas/ravb_main.c > [...] > > @@ -2111,6 +2166,7 @@ static int ravb_runtime_nop(struct device *dev) > > } > > > > static const struct dev_pm_ops ravb_dev_pm_ops = { > > + SET_SYSTEM_SLEEP_PM_OPS(ravb_runtime_suspend, ravb_runtime_resume) > > Why in the world you used runtime_ in the usual suspend/resume method > names?! Since DaveM have already taken the patch, please send a follow-up > patch to remove that infix. Sorry about that, stupid error on my part. Will send a follow-up patch. Thanks for finding it. > > > SET_RUNTIME_PM_OPS(ravb_runtime_nop, ravb_runtime_nop, NULL) > > }; > > > > MBR, Sergei >
From: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Date: Wed, 10 Aug 2016 13:47:26 +0300 > Ugh, I should have reviewed the patch earlier -- I was postponing this > until I have the time to test it... Since the patch did have some > visible issues, it should've been recast before applying. DaveM, > please in the future could you ping me before merging? Review patches in a timely manner. If I can go through a 5 day email outage and still see this patch rotting in patchwork, you could have reviewed it in time.
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c index da8da86..1de55c9 100644 --- a/drivers/net/ethernet/renesas/ravb_main.c +++ b/drivers/net/ethernet/renesas/ravb_main.c @@ -1876,6 +1876,20 @@ static int ravb_set_gti(struct net_device *ndev) return 0; } +static void ravb_set_config_mode(struct net_device *ndev) +{ + struct ravb_private *priv = netdev_priv(ndev); + + if (priv->chip_id == RCAR_GEN2) { + ravb_modify(ndev, CCC, CCC_OPC, CCC_OPC_CONFIG); + /* Set CSEL value */ + ravb_modify(ndev, CCC, CCC_CSEL, CCC_CSEL_HPB); + } else { + ravb_modify(ndev, CCC, CCC_OPC, CCC_OPC_CONFIG | + CCC_GAC | CCC_CSEL_HPB); + } +} + static int ravb_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; @@ -1979,14 +1993,7 @@ static int ravb_probe(struct platform_device *pdev) ndev->ethtool_ops = &ravb_ethtool_ops; /* Set AVB config mode */ - if (chip_id == RCAR_GEN2) { - ravb_modify(ndev, CCC, CCC_OPC, CCC_OPC_CONFIG); - /* Set CSEL value */ - ravb_modify(ndev, CCC, CCC_CSEL, CCC_CSEL_HPB); - } else { - ravb_modify(ndev, CCC, CCC_OPC, CCC_OPC_CONFIG | - CCC_GAC | CCC_CSEL_HPB); - } + ravb_set_config_mode(ndev); /* Set GTI value */ error = ravb_set_gti(ndev); @@ -2098,6 +2105,54 @@ static int ravb_remove(struct platform_device *pdev) } #ifdef CONFIG_PM +static int ravb_runtime_suspend(struct device *dev) +{ + struct net_device *ndev = dev_get_drvdata(dev); + int ret = 0; + + if (netif_running(ndev)) { + netif_device_detach(ndev); + ret = ravb_close(ndev); + } + + return ret; +} + +static int ravb_runtime_resume(struct device *dev) +{ + struct net_device *ndev = dev_get_drvdata(dev); + struct ravb_private *priv = netdev_priv(ndev); + int ret = 0; + + /* All register have been reset to default values. + * Restore all registers which where setup at probe time and + * reopen device if it was running before system suspended. + */ + + /* Set AVB config mode */ + ravb_set_config_mode(ndev); + + /* Set GTI value */ + ret = ravb_set_gti(ndev); + if (ret) + return ret; + + /* Request GTI loading */ + ravb_modify(ndev, GCCR, GCCR_LTI, GCCR_LTI); + + /* Restore descriptor base address table */ + ravb_write(ndev, priv->desc_bat_dma, DBAT); + + if (netif_running(ndev)) { + ret = ravb_open(ndev); + if (ret < 0) + return ret; + netif_device_attach(ndev); + } + + return ret; +} + static int ravb_runtime_nop(struct device *dev) { /* Runtime PM callback shared between ->runtime_suspend() @@ -2111,6 +2166,7 @@ static int ravb_runtime_nop(struct device *dev) } static const struct dev_pm_ops ravb_dev_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(ravb_runtime_suspend, ravb_runtime_resume) SET_RUNTIME_PM_OPS(ravb_runtime_nop, ravb_runtime_nop, NULL) };
The interface would not function after the system had been woken up after have been suspended (echo mem > /sys/power/state) cycle. The reason for this is that all device registers have been reset to its default values. This patch adds sleep suspend and resume functions that detached the interface at suspend and restore the registers and reattach the interface at resume. Only the registers that are only configured at probe time needs to be explicitly restored by the resume handler. All other registers are reconfigured by either reopening the device in the resume handler (if the device was running when the system was suspended) or when the interface is opened by a user at a later time. Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> --- drivers/net/ethernet/renesas/ravb_main.c | 72 ++++++++++++++++++++++++++++---- 1 file changed, 64 insertions(+), 8 deletions(-)