Re: [PATCH 2/3] PCI/AER: Decode Requester ID when no error info found
On Tue, Jan 02, 2024 at 11:22:53AM -0800, Kuppuswamy Sathyanarayanan wrote:
> On 12/6/2023 2:42 PM, Bjorn Helgaas wrote:
> > From: Bjorn Helgaas
> >
> > When a device with AER detects an error, it logs error information in its
> > own AER Error Status registers. It may send an Error Message to the Root
> > Port (RCEC in the case of an RCiEP), which logs the fact that an Error
> > Message was received (Root Error Status) and the Requester ID of the
> > message source (Error Source Identification).
> >
> > aer_print_port_info() prints the Requester ID from the Root Port Error
> > Source in the usual Linux "bb:dd.f" format, but when find_source_device()
> > finds no error details in the hierarchy below the Root Port, it printed the
> > raw Requester ID without decoding it.
> >
> > Decode the Requester ID in the usual Linux format so it matches other
> > messages.
> >
> > Sample message changes:
> >
> > - pcieport :00:1c.5: AER: Correctable error received: :00:1c.5
> > - pcieport :00:1c.5: AER: can't find device of ID00e5
> > + pcieport :00:1c.5: AER: Correctable error message received from
> > :00:1c.5
> > + pcieport :00:1c.5: AER: found no error details for :00:1c.5
> >
> > Signed-off-by: Bjorn Helgaas
>
> Except for the suggestion given below, it looks good to me.
>
> Reviewed-by: Kuppuswamy Sathyanarayanan
>
Thanks for taking a look!
> > @@ -740,7 +740,7 @@ static void aer_print_port_info(struct pci_dev *dev,
> > struct aer_err_info *info)
> > u8 bus = info->id >> 8;
> > u8 devfn = info->id & 0xff;
> >
> > - pci_info(dev, "%s%s error received: %04x:%02x:%02x.%d\n",
> > + pci_info(dev, "%s%s error message received from %04x:%02x:%02x.%d\n",
> > info->multi_error_valid ? "Multiple " : "",
> > aer_error_severity_string[info->severity],
> > pci_domain_nr(dev->bus), bus, PCI_SLOT(devfn),
> > @@ -929,7 +929,12 @@ static bool find_source_device(struct pci_dev *parent,
> > pci_walk_bus(parent->subordinate, find_device_iter, e_info);
> >
> > if (!e_info->error_dev_num) {
> > - pci_info(parent, "can't find device of ID%04x\n", e_info->id);
> > + u8 bus = e_info->id >> 8;
> > + u8 devfn = e_info->id & 0xff;
>
> You can use PCI_BUS_NUM(e_info->id) for getting bus number. Since
> you are extracting this info in more than one place, maybe you can
> also define a macro PCI_DEVFN(id) (following PCI_BUS_NUM()).
Thanks, both good ideas.
We already have a PCI_DEVFN() that *combines* slot + func into devfn,
so we'd have to come up with a different name.
I'll add a patch to use PCI_BUS_NUM() in the two places here and in
pme.c.
I think I'll wait with these until after the v6.7 release.
> > + pci_info(parent, "found no error details for
> > %04x:%02x:%02x.%d\n",
> > +pci_domain_nr(parent->bus), bus, PCI_SLOT(devfn),
> > +PCI_FUNC(devfn));
> > return false;
> > }
> > return true;
>
> --
> Sathyanarayanan Kuppuswamy
> Linux Kernel Developer
Re: [PATCH 2/3] PCI/AER: Decode Requester ID when no error info found
On 12/6/2023 2:42 PM, Bjorn Helgaas wrote:
> From: Bjorn Helgaas
>
> When a device with AER detects an error, it logs error information in its
> own AER Error Status registers. It may send an Error Message to the Root
> Port (RCEC in the case of an RCiEP), which logs the fact that an Error
> Message was received (Root Error Status) and the Requester ID of the
> message source (Error Source Identification).
>
> aer_print_port_info() prints the Requester ID from the Root Port Error
> Source in the usual Linux "bb:dd.f" format, but when find_source_device()
> finds no error details in the hierarchy below the Root Port, it printed the
> raw Requester ID without decoding it.
>
> Decode the Requester ID in the usual Linux format so it matches other
> messages.
>
> Sample message changes:
>
> - pcieport :00:1c.5: AER: Correctable error received: :00:1c.5
> - pcieport :00:1c.5: AER: can't find device of ID00e5
> + pcieport :00:1c.5: AER: Correctable error message received from
> :00:1c.5
> + pcieport :00:1c.5: AER: found no error details for :00:1c.5
>
> Signed-off-by: Bjorn Helgaas
Except for the suggestion given below, it looks good to me.
Reviewed-by: Kuppuswamy Sathyanarayanan
> ---
> drivers/pci/pcie/aer.c | 9 +++--
> 1 file changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
> index 20db80018b5d..2ff6bac9979f 100644
> --- a/drivers/pci/pcie/aer.c
> +++ b/drivers/pci/pcie/aer.c
> @@ -740,7 +740,7 @@ static void aer_print_port_info(struct pci_dev *dev,
> struct aer_err_info *info)
> u8 bus = info->id >> 8;
> u8 devfn = info->id & 0xff;
>
> - pci_info(dev, "%s%s error received: %04x:%02x:%02x.%d\n",
> + pci_info(dev, "%s%s error message received from %04x:%02x:%02x.%d\n",
>info->multi_error_valid ? "Multiple " : "",
>aer_error_severity_string[info->severity],
>pci_domain_nr(dev->bus), bus, PCI_SLOT(devfn),
> @@ -929,7 +929,12 @@ static bool find_source_device(struct pci_dev *parent,
> pci_walk_bus(parent->subordinate, find_device_iter, e_info);
>
> if (!e_info->error_dev_num) {
> - pci_info(parent, "can't find device of ID%04x\n", e_info->id);
> + u8 bus = e_info->id >> 8;
> + u8 devfn = e_info->id & 0xff;
You can use PCI_BUS_NUM(e_info->id) for getting bus number. Since you are
extracting this info in more than one place, maybe you can also define a
macro PCI_DEVFN(id) (following PCI_BUS_NUM()).
> +
> + pci_info(parent, "found no error details for
> %04x:%02x:%02x.%d\n",
> + pci_domain_nr(parent->bus), bus, PCI_SLOT(devfn),
> + PCI_FUNC(devfn));
> return false;
> }
> return true;
--
Sathyanarayanan Kuppuswamy
Linux Kernel Developer
Re: [PATCH 2/3] PCI/AER: Decode Requester ID when no error info found
LGTM
On 12/6/23 16:42, Bjorn Helgaas wrote:
> From: Bjorn Helgaas
>
> When a device with AER detects an error, it logs error information in its
> own AER Error Status registers. It may send an Error Message to the Root
> Port (RCEC in the case of an RCiEP), which logs the fact that an Error
> Message was received (Root Error Status) and the Requester ID of the
> message source (Error Source Identification).
>
> aer_print_port_info() prints the Requester ID from the Root Port Error
> Source in the usual Linux "bb:dd.f" format, but when find_source_device()
> finds no error details in the hierarchy below the Root Port, it printed the
> raw Requester ID without decoding it.
>
> Decode the Requester ID in the usual Linux format so it matches other
> messages.
>
> Sample message changes:
>
> - pcieport :00:1c.5: AER: Correctable error received: :00:1c.5
> - pcieport :00:1c.5: AER: can't find device of ID00e5
> + pcieport :00:1c.5: AER: Correctable error message received from
> :00:1c.5
> + pcieport :00:1c.5: AER: found no error details for :00:1c.5
>
> Signed-off-by: Bjorn Helgaas
> ---
> drivers/pci/pcie/aer.c | 9 +++--
> 1 file changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
> index 20db80018b5d..2ff6bac9979f 100644
> --- a/drivers/pci/pcie/aer.c
> +++ b/drivers/pci/pcie/aer.c
> @@ -740,7 +740,7 @@ static void aer_print_port_info(struct pci_dev *dev,
> struct aer_err_info *info)
> u8 bus = info->id >> 8;
> u8 devfn = info->id & 0xff;
>
> - pci_info(dev, "%s%s error received: %04x:%02x:%02x.%d\n",
> + pci_info(dev, "%s%s error message received from %04x:%02x:%02x.%d\n",
>info->multi_error_valid ? "Multiple " : "",
>aer_error_severity_string[info->severity],
>pci_domain_nr(dev->bus), bus, PCI_SLOT(devfn),
> @@ -929,7 +929,12 @@ static bool find_source_device(struct pci_dev *parent,
> pci_walk_bus(parent->subordinate, find_device_iter, e_info);
>
> if (!e_info->error_dev_num) {
> - pci_info(parent, "can't find device of ID%04x\n", e_info->id);
> + u8 bus = e_info->id >> 8;
> + u8 devfn = e_info->id & 0xff;
> +
> + pci_info(parent, "found no error details for
> %04x:%02x:%02x.%d\n",
> + pci_domain_nr(parent->bus), bus, PCI_SLOT(devfn),
> + PCI_FUNC(devfn));
> return false;
> }
> return true;
Re: [PATCH 2/3] PCI/AER: Decode Requester ID when no error info found
On Wed, 6 Dec 2023 16:42:30 -0600 Bjorn Helgaas wrote: > From: Bjorn Helgaas > > When a device with AER detects an error, it logs error information in its > own AER Error Status registers. It may send an Error Message to the Root > Port (RCEC in the case of an RCiEP), which logs the fact that an Error > Message was received (Root Error Status) and the Requester ID of the > message source (Error Source Identification). > > aer_print_port_info() prints the Requester ID from the Root Port Error > Source in the usual Linux "bb:dd.f" format, but when find_source_device() > finds no error details in the hierarchy below the Root Port, it printed the > raw Requester ID without decoding it. > > Decode the Requester ID in the usual Linux format so it matches other > messages. > > Sample message changes: > > - pcieport :00:1c.5: AER: Correctable error received: :00:1c.5 > - pcieport :00:1c.5: AER: can't find device of ID00e5 > + pcieport :00:1c.5: AER: Correctable error message received from > :00:1c.5 > + pcieport :00:1c.5: AER: found no error details for :00:1c.5 > > Signed-off-by: Bjorn Helgaas LGTM Reviewed-by: Jonathan Cameron
[PATCH 2/3] PCI/AER: Decode Requester ID when no error info found
From: Bjorn Helgaas
When a device with AER detects an error, it logs error information in its
own AER Error Status registers. It may send an Error Message to the Root
Port (RCEC in the case of an RCiEP), which logs the fact that an Error
Message was received (Root Error Status) and the Requester ID of the
message source (Error Source Identification).
aer_print_port_info() prints the Requester ID from the Root Port Error
Source in the usual Linux "bb:dd.f" format, but when find_source_device()
finds no error details in the hierarchy below the Root Port, it printed the
raw Requester ID without decoding it.
Decode the Requester ID in the usual Linux format so it matches other
messages.
Sample message changes:
- pcieport :00:1c.5: AER: Correctable error received: :00:1c.5
- pcieport :00:1c.5: AER: can't find device of ID00e5
+ pcieport :00:1c.5: AER: Correctable error message received from
:00:1c.5
+ pcieport :00:1c.5: AER: found no error details for :00:1c.5
Signed-off-by: Bjorn Helgaas
---
drivers/pci/pcie/aer.c | 9 +++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
index 20db80018b5d..2ff6bac9979f 100644
--- a/drivers/pci/pcie/aer.c
+++ b/drivers/pci/pcie/aer.c
@@ -740,7 +740,7 @@ static void aer_print_port_info(struct pci_dev *dev, struct
aer_err_info *info)
u8 bus = info->id >> 8;
u8 devfn = info->id & 0xff;
- pci_info(dev, "%s%s error received: %04x:%02x:%02x.%d\n",
+ pci_info(dev, "%s%s error message received from %04x:%02x:%02x.%d\n",
info->multi_error_valid ? "Multiple " : "",
aer_error_severity_string[info->severity],
pci_domain_nr(dev->bus), bus, PCI_SLOT(devfn),
@@ -929,7 +929,12 @@ static bool find_source_device(struct pci_dev *parent,
pci_walk_bus(parent->subordinate, find_device_iter, e_info);
if (!e_info->error_dev_num) {
- pci_info(parent, "can't find device of ID%04x\n", e_info->id);
+ u8 bus = e_info->id >> 8;
+ u8 devfn = e_info->id & 0xff;
+
+ pci_info(parent, "found no error details for
%04x:%02x:%02x.%d\n",
+pci_domain_nr(parent->bus), bus, PCI_SLOT(devfn),
+PCI_FUNC(devfn));
return false;
}
return true;
--
2.34.1
