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SubjectRe: [PATCH 1/5] PCI/AER: Define and allocate aer_stats structure for AER capable devices
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On 05/22/2018 06:28 PM, Rajat Jain wrote:
> Define a structure to hold the AER statistics. There are 2 groups
> of statistics: dev_* counters that are to be collected for all AER
> capable devices and rootport_* counters that are collected for all
> (AER capable) rootports only. Allocate and free this structure when
> device is added or released (thus counters survive the lifetime of the
> device).
>
> Add a new file aerdrv_stats.c to hold the AER stats collection logic.
>
> Signed-off-by: Rajat Jain <rajatja@google.com>
> ---
> drivers/pci/pcie/aer/Makefile | 2 +-
> drivers/pci/pcie/aer/aerdrv.h | 6 +++
> drivers/pci/pcie/aer/aerdrv_core.c | 9 ++++
> drivers/pci/pcie/aer/aerdrv_stats.c | 64 +++++++++++++++++++++++++++++
> drivers/pci/probe.c | 1 +
> include/linux/pci.h | 3 ++
> 6 files changed, 84 insertions(+), 1 deletion(-)
> create mode 100644 drivers/pci/pcie/aer/aerdrv_stats.c
>
> diff --git a/drivers/pci/pcie/aer/Makefile b/drivers/pci/pcie/aer/Makefile
>
> -aerdriver-objs := aerdrv_errprint.o aerdrv_core.o aerdrv.o
> +aerdriver-objs := aerdrv_errprint.o aerdrv_core.o aerdrv.o aerdrv_stats.o
> aerdriver-$(CONFIG_ACPI) += aerdrv_acpi.o
>
> obj-$(CONFIG_PCIEAER_INJECT) += aer_inject.o
> diff --git a/drivers/pci/pcie/aer/aerdrv.h b/drivers/pci/pcie/aer/aerdrv.h
> index b4c950683cc7..d8b9fba536ed 100644
> --- a/drivers/pci/pcie/aer/aerdrv.h
> +++ b/drivers/pci/pcie/aer/aerdrv.h
> @@ -33,6 +33,10 @@
> PCI_ERR_UNC_MALF_TLP)
>
> #define AER_MAX_MULTI_ERR_DEVICES 5 /* Not likely to have more */
> +
> +#define AER_MAX_TYPEOF_CORRECTABLE_ERRS 16 /* as per PCI_ERR_COR_STATUS */
> +#define AER_MAX_TYPEOF_UNCORRECTABLE_ERRS 26 /* as per PCI_ERR_UNCOR_STATUS*/
> +
> struct aer_err_info {
> struct pci_dev *dev[AER_MAX_MULTI_ERR_DEVICES];
> int error_dev_num;
> @@ -81,6 +85,8 @@ void aer_isr(struct work_struct *work);
> void aer_print_error(struct pci_dev *dev, struct aer_err_info *info);
> void aer_print_port_info(struct pci_dev *dev, struct aer_err_info *info);
> irqreturn_t aer_irq(int irq, void *context);
> +int pci_aer_stats_init(struct pci_dev *pdev);
> +void pci_aer_stats_exit(struct pci_dev *pdev);
>
> #ifdef CONFIG_ACPI_APEI
> int pcie_aer_get_firmware_first(struct pci_dev *pci_dev);
> diff --git a/drivers/pci/pcie/aer/aerdrv_core.c b/drivers/pci/pcie/aer/aerdrv_core.c
> index 36e622d35c48..42a6f913069a 100644
> --- a/drivers/pci/pcie/aer/aerdrv_core.c
> +++ b/drivers/pci/pcie/aer/aerdrv_core.c
> @@ -95,9 +95,18 @@ int pci_cleanup_aer_error_status_regs(struct pci_dev *dev)
> int pci_aer_init(struct pci_dev *dev)
> {
> dev->aer_cap = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);
> +
> + if (!dev->aer_cap || pci_aer_stats_init(dev))
> + return -EIO;
> +
> return pci_cleanup_aer_error_status_regs(dev);
> }
>
> +void pci_aer_exit(struct pci_dev *dev)
> +{
> + pci_aer_stats_exit(dev);
> +}
> +
> /**
> * add_error_device - list device to be handled
> * @e_info: pointer to error info
> diff --git a/drivers/pci/pcie/aer/aerdrv_stats.c b/drivers/pci/pcie/aer/aerdrv_stats.c
> new file mode 100644
> index 000000000000..b9f251992209
> --- /dev/null
> +++ b/drivers/pci/pcie/aer/aerdrv_stats.c
> @@ -0,0 +1,64 @@
> +// SPDX-License-Identifier: GPL-2.0

Fix the formatting please - that gross // gibberish doesn't belong there.

Jes

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