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Date: Fri, 22 Feb 2013 05:57:55 -0300
From: Mauro Carvalho Chehab <mchehab@...hat.com>
To: Mauro Carvalho Chehab <mchehab@...hat.com>
Cc: Huang Ying <ying.huang@...el.com>, 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
Em Fri, 22 Feb 2013 05:50:21 -0300
Mauro Carvalho Chehab <mchehab@...hat.com> escreveu:
> Em Fri, 22 Feb 2013 08:45:11 +0800
> Huang Ying <ying.huang@...el.com> escreveu:
>
> > On Thu, 2013-02-21 at 09:04 -0300, Mauro Carvalho Chehab wrote:
> > > Em Thu, 21 Feb 2013 09:26:07 +0800
> > > Huang Ying <ying.huang@...el.com> escreveu:
> > >
>
> > > There is also an advantage on taking this approach: this patch can have just
> > > the ghes changes, and will still compile fine, as CONFIG_EDAC_GHES is not
> > > defined yet. So, the patch becomes is simpler and easier to review.
> >
> > Thanks for your explanation. I agree to keep this in header file.
> >
> > My original suggestion is that it may be better to move this from ghes.h
> > to some place like "ghes_edac.h", because these functions are
> > implemented in "ghes_edac.c" instead of ghes.c.
> >
>
> Ah! Well, I considered a separate header when writing this patch, but adding
> another header for just 3 functions where the parameters are more related to
> ghes than with ghes_edac seemed overkill to me.
>
> IMO, a single comment at the header pointing to ghes_edac.c would improve it.
>
...
> +/* From drivers/edac/ghes_acpi.h */
...with is obviously wrong.
Mental note to myself: never hack too early in the morning before drinking a
cup of coffee.
Anyway, fixed on the patch below. Could you please ack?
Regards,
Mauro.
[PATCH EDAC] ghes: add the needed hooks for EDAC error report
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>
diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index 6d0e146..d668a8a 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);
@@ -899,6 +903,11 @@ static int ghes_probe(struct platform_device *ghes_dev)
ghes = NULL;
goto err;
}
+
+ rc = ghes_edac_register(ghes, &ghes_dev->dev);
+ if (rc < 0)
+ goto err;
+
switch (generic->notify.type) {
case ACPI_HEST_NOTIFY_POLLED:
ghes->timer.function = ghes_poll_func;
@@ -911,13 +920,13 @@ static int ghes_probe(struct platform_device *ghes_dev)
if (acpi_gsi_to_irq(generic->notify.vector, &ghes->irq)) {
pr_err(GHES_PFX "Failed to map GSI to IRQ for generic hardware error source: %d\n",
generic->header.source_id);
- goto err;
+ goto err_edac_unreg;
}
if (request_irq(ghes->irq, ghes_irq_func,
0, "GHES IRQ", ghes)) {
pr_err(GHES_PFX "Failed to register IRQ for generic hardware error source: %d\n",
generic->header.source_id);
- goto err;
+ goto err_edac_unreg;
}
break;
case ACPI_HEST_NOTIFY_SCI:
@@ -943,6 +952,8 @@ static int ghes_probe(struct platform_device *ghes_dev)
platform_set_drvdata(ghes_dev, ghes);
return 0;
+err_edac_unreg:
+ ghes_edac_unregister(ghes);
err:
if (ghes) {
ghes_fini(ghes);
@@ -995,6 +1006,9 @@ 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..720446c 100644
--- a/include/acpi/ghes.h
+++ b/include/acpi/ghes.h
@@ -27,6 +27,7 @@ struct ghes {
struct ghes_estatus_node {
struct llist_node llnode;
struct acpi_hest_generic *generic;
+ struct ghes *ghes;
};
struct ghes_estatus_cache {
@@ -43,3 +44,29 @@ enum {
GHES_SEV_RECOVERABLE = 0x2,
GHES_SEV_PANIC = 0x3,
};
+
+/* From drivers/edac/ghes_edac.c */
+
+#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
--
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