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Date: Thu, 21 Feb 2013 09:26:07 +0800
From: Huang Ying <ying.huang@...el.com>
To: Mauro Carvalho Chehab <mchehab@...hat.com>
Cc: linux-acpi@...r.kernel.org, Tony Luck <tony.luck@...el.com>,
Linux Edac Mailing List <linux-edac@...r.kernel.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH EDAC 03/13] ghes: add the needed hooks for EDAC error
report
Sorry for late!
On Fri, 2013-02-15 at 10:44 -0200, Mauro Carvalho Chehab wrote:
> In order to allow reporting errors via EDAC, add hooks for:
>
> 1) register an EDAC driver;
> 2) unregister an EDAC driver;
> 3) report errors via EDAC.
>
> As the EDAC driver will need to access the ghes structure, adds it
> as one of the parameters for ghes_do_proc.
>
> Signed-off-by: Mauro Carvalho Chehab <mchehab@...hat.com>
> ---
> drivers/acpi/apei/ghes.c | 17 ++++++++++++++---
> include/acpi/ghes.h | 27 +++++++++++++++++++++++++++
> 2 files changed, 41 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
> index 6d0e146..a21d7da 100644
> --- a/drivers/acpi/apei/ghes.c
> +++ b/drivers/acpi/apei/ghes.c
> @@ -409,7 +409,8 @@ static void ghes_clear_estatus(struct ghes *ghes)
> ghes->flags &= ~GHES_TO_CLEAR;
> }
>
> -static void ghes_do_proc(const struct acpi_hest_generic_status *estatus)
> +static void ghes_do_proc(struct ghes *ghes,
> + const struct acpi_hest_generic_status *estatus)
> {
> int sev, sec_sev;
> struct acpi_hest_generic_data *gdata;
> @@ -421,6 +422,8 @@ static void ghes_do_proc(const struct acpi_hest_generic_status *estatus)
> CPER_SEC_PLATFORM_MEM)) {
> struct cper_sec_mem_err *mem_err;
> mem_err = (struct cper_sec_mem_err *)(gdata+1);
> + ghes_edac_report_mem_error(ghes, sev, mem_err);
> +
> #ifdef CONFIG_X86_MCE
> apei_mce_report_mem_error(sev == GHES_SEV_CORRECTED,
> mem_err);
> @@ -639,7 +642,7 @@ static int ghes_proc(struct ghes *ghes)
> if (ghes_print_estatus(NULL, ghes->generic, ghes->estatus))
> ghes_estatus_cache_add(ghes->generic, ghes->estatus);
> }
> - ghes_do_proc(ghes->estatus);
> + ghes_do_proc(ghes, ghes->estatus);
> out:
> ghes_clear_estatus(ghes);
> return 0;
> @@ -732,7 +735,7 @@ static void ghes_proc_in_irq(struct irq_work *irq_work)
> estatus = GHES_ESTATUS_FROM_NODE(estatus_node);
> len = apei_estatus_len(estatus);
> node_len = GHES_ESTATUS_NODE_LEN(len);
> - ghes_do_proc(estatus);
> + ghes_do_proc(estatus_node->ghes, estatus);
> if (!ghes_estatus_cached(estatus)) {
> generic = estatus_node->generic;
> if (ghes_print_estatus(NULL, generic, estatus))
> @@ -821,6 +824,7 @@ static int ghes_notify_nmi(unsigned int cmd, struct pt_regs *regs)
> estatus_node = (void *)gen_pool_alloc(ghes_estatus_pool,
> node_len);
> if (estatus_node) {
> + estatus_node->ghes = ghes;
> estatus_node->generic = ghes->generic;
> estatus = GHES_ESTATUS_FROM_NODE(estatus_node);
> memcpy(estatus, ghes->estatus, len);
> @@ -942,6 +946,10 @@ static int ghes_probe(struct platform_device *ghes_dev)
> }
> platform_set_drvdata(ghes_dev, ghes);
>
> + rc = ghes_edac_register(ghes, &ghes_dev->dev);
> + if (rc < 0)
> + goto err;
> +
If ghes_edac_register() failed, we need to do some cleanup such as
unregister from hed etc.
Or just move ghes_edac_register() before switch?
> return 0;
> err:
> if (ghes) {
> @@ -995,6 +1003,9 @@ static int ghes_remove(struct platform_device *ghes_dev)
> }
>
> ghes_fini(ghes);
> +
> + ghes_edac_unregister(ghes);
> +
> kfree(ghes);
>
> platform_set_drvdata(ghes_dev, NULL);
> diff --git a/include/acpi/ghes.h b/include/acpi/ghes.h
> index 3eb8dc4..c6fef72 100644
> --- a/include/acpi/ghes.h
> +++ b/include/acpi/ghes.h
> @@ -22,11 +22,14 @@ struct ghes {
> struct timer_list timer;
> unsigned int irq;
> };
> +
> + struct mem_ctl_info *mci;
Why we need this? This is not used by ghes.[hc].
> };
>
> struct ghes_estatus_node {
> struct llist_node llnode;
> struct acpi_hest_generic *generic;
> + struct ghes *ghes;
> };
>
> struct ghes_estatus_cache {
> @@ -43,3 +46,27 @@ enum {
> GHES_SEV_RECOVERABLE = 0x2,
> GHES_SEV_PANIC = 0x3,
> };
> +
> +#ifdef CONFIG_EDAC_GHES
> +void ghes_edac_report_mem_error(struct ghes *ghes, int sev,
> + struct cper_sec_mem_err *mem_err);
> +
> +int ghes_edac_register(struct ghes *ghes, struct device *dev);
> +
> +void ghes_edac_unregister(struct ghes *ghes);
> +
> +#else
> +static inline void ghes_edac_report_mem_error(struct ghes *ghes, int sev,
> + struct cper_sec_mem_err *mem_err)
> +{
> +}
> +
> +static inline int ghes_edac_register(struct ghes *ghes, struct device *dev)
> +{
> + return 0;
> +}
> +
> +static inline void ghes_edac_unregister(struct ghes *ghes)
> +{
> +}
> +#endif
I think it is better to put the above declaration into module which
implement these functions instead of use these functions.
Best Regards,
Huang Ying
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