From: Robert Richter <rrichter@marvell.com>
Date: Wed, 6 Nov 2019 09:33:07 +0000
Subject: EDAC: Introduce an mci_for_each_dimm() iterator
Git-commit: c498afaf7df87f44e7cb383c135baec52b5259be
Patch-mainline: v5.5-rc1
References: jsc#SLE-9482
Introduce an mci_for_each_dimm() iterator. It returns a pointer to
a struct dimm_info. This makes the declaration and use of an index
obsolete and avoids access to internal data of struct mci (direct array
access etc).
[ bp: push the struct dimm_info *dimm; declaration into the
CONFIG_EDAC_DEBUG block. ]
Signed-off-by: Robert Richter <rrichter@marvell.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Cc: "linux-edac@vger.kernel.org" <linux-edac@vger.kernel.org>
Cc: James Morse <james.morse@arm.com>
Cc: Tony Luck <tony.luck@intel.com>
Link: https://lkml.kernel.org/r/20191106093239.25517-4-rrichter@marvell.com
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
---
drivers/edac/edac_mc.c | 19 +++++++++++--------
drivers/edac/edac_mc_sysfs.c | 29 ++++++++++++-----------------
drivers/edac/ghes_edac.c | 9 +++++----
drivers/edac/i5100_edac.c | 13 +++++--------
include/linux/edac.h | 7 +++++++
5 files changed, 40 insertions(+), 37 deletions(-)
diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c
index cb5356411251..88e24ece3e1e 100644
--- a/drivers/edac/edac_mc.c
+++ b/drivers/edac/edac_mc.c
@@ -145,15 +145,18 @@ static void edac_mc_dump_channel(struct rank_info *chan)
edac_dbg(4, " channel->dimm = %p\n", chan->dimm);
}
-static void edac_mc_dump_dimm(struct dimm_info *dimm, int number)
+static void edac_mc_dump_dimm(struct dimm_info *dimm)
{
char location[80];
+ if (!dimm->nr_pages)
+ return;
+
edac_dimm_info_location(dimm, location, sizeof(location));
edac_dbg(4, "%s%i: %smapped as virtual row %d, chan %d\n",
dimm->mci->csbased ? "rank" : "dimm",
- number, location, dimm->csrow, dimm->cschannel);
+ dimm->idx, location, dimm->csrow, dimm->cschannel);
edac_dbg(4, " dimm = %p\n", dimm);
edac_dbg(4, " dimm->label = '%s'\n", dimm->label);
edac_dbg(4, " dimm->nr_pages = 0x%x\n", dimm->nr_pages);
@@ -712,6 +715,7 @@ int edac_mc_add_mc_with_groups(struct mem_ctl_info *mci,
edac_mc_dump_mci(mci);
if (edac_debug_level >= 4) {
+ struct dimm_info *dimm;
int i;
for (i = 0; i < mci->nr_csrows; i++) {
@@ -728,9 +732,9 @@ int edac_mc_add_mc_with_groups(struct mem_ctl_info *mci,
if (csrow->channels[j]->dimm->nr_pages)
edac_mc_dump_channel(csrow->channels[j]);
}
- for (i = 0; i < mci->tot_dimms; i++)
- if (mci->dimms[i]->nr_pages)
- edac_mc_dump_dimm(mci->dimms[i], i);
+
+ mci_for_each_dimm(mci, dimm)
+ edac_mc_dump_dimm(dimm);
}
#endif
mutex_lock(&mem_ctls_mutex);
@@ -1088,6 +1092,7 @@ void edac_mc_handle_error(const enum hw_event_mc_err_type type,
const char *msg,
const char *other_detail)
{
+ struct dimm_info *dimm;
char *p;
int row = -1, chan = -1;
int pos[EDAC_MAX_LAYERS] = { top_layer, mid_layer, low_layer };
@@ -1148,9 +1153,7 @@ void edac_mc_handle_error(const enum hw_event_mc_err_type type,
p = e->label;
*p = '\0';
- for (i = 0; i < mci->tot_dimms; i++) {
- struct dimm_info *dimm = mci->dimms[i];
-
+ mci_for_each_dimm(mci, dimm) {
if (top_layer >= 0 && top_layer != dimm->location[0])
continue;
if (mid_layer >= 0 && mid_layer != dimm->location[1])
diff --git a/drivers/edac/edac_mc_sysfs.c b/drivers/edac/edac_mc_sysfs.c
index 91e4c8f155af..0367554e7437 100644
--- a/drivers/edac/edac_mc_sysfs.c
+++ b/drivers/edac/edac_mc_sysfs.c
@@ -621,8 +621,7 @@ static const struct device_type dimm_attr_type = {
/* Create a DIMM object under specifed memory controller device */
static int edac_create_dimm_object(struct mem_ctl_info *mci,
- struct dimm_info *dimm,
- int index)
+ struct dimm_info *dimm)
{
int err;
dimm->mci = mci;
@@ -632,9 +631,9 @@ static int edac_create_dimm_object(struct mem_ctl_info *mci,
dimm->dev.parent = &mci->dev;
if (mci->csbased)
- dev_set_name(&dimm->dev, "rank%d", index);
+ dev_set_name(&dimm->dev, "rank%d", dimm->idx);
else
- dev_set_name(&dimm->dev, "dimm%d", index);
+ dev_set_name(&dimm->dev, "dimm%d", dimm->idx);
dev_set_drvdata(&dimm->dev, dimm);
pm_runtime_forbid(&mci->dev);
@@ -916,7 +915,8 @@ static const struct device_type mci_attr_type = {
int edac_create_sysfs_mci_device(struct mem_ctl_info *mci,
const struct attribute_group **groups)
{
- int i, err;
+ struct dimm_info *dimm;
+ int err;
/* get the /sys/devices/system/edac subsys reference */
mci->dev.type = &mci_attr_type;
@@ -940,13 +940,12 @@ int edac_create_sysfs_mci_device(struct mem_ctl_info *mci,
/*
* Create the dimm/rank devices
*/
- for (i = 0; i < mci->tot_dimms; i++) {
- struct dimm_info *dimm = mci->dimms[i];
+ mci_for_each_dimm(mci, dimm) {
/* Only expose populated DIMMs */
if (!dimm->nr_pages)
continue;
- err = edac_create_dimm_object(mci, dimm, i);
+ err = edac_create_dimm_object(mci, dimm);
if (err)
goto fail_unregister_dimm;
}
@@ -961,12 +960,9 @@ int edac_create_sysfs_mci_device(struct mem_ctl_info *mci,
return 0;
fail_unregister_dimm:
- for (i--; i >= 0; i--) {
- struct dimm_info *dimm = mci->dimms[i];
- if (!dimm->nr_pages)
- continue;
-
- device_unregister(&dimm->dev);
+ mci_for_each_dimm(mci, dimm) {
+ if (device_is_registered(&dimm->dev))
+ device_unregister(&dimm->dev);
}
device_unregister(&mci->dev);
@@ -978,7 +974,7 @@ int edac_create_sysfs_mci_device(struct mem_ctl_info *mci,
*/
void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
{
- int i;
+ struct dimm_info *dimm;
edac_dbg(0, "\n");
@@ -989,8 +985,7 @@ void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
edac_delete_csrow_objects(mci);
#endif
- for (i = 0; i < mci->tot_dimms; i++) {
- struct dimm_info *dimm = mci->dimms[i];
+ mci_for_each_dimm(mci, dimm) {
if (dimm->nr_pages == 0)
continue;
edac_dbg(1, "unregistering device %s\n", dev_name(&dimm->dev));
diff --git a/drivers/edac/ghes_edac.c b/drivers/edac/ghes_edac.c
index 2275d6bf6bc5..fbc8b1de3ddd 100644
--- a/drivers/edac/ghes_edac.c
+++ b/drivers/edac/ghes_edac.c
@@ -90,12 +90,13 @@ static void ghes_edac_count_dimms(const struct dmi_header *dh, void *arg)
static int get_dimm_smbios_index(struct mem_ctl_info *mci, u16 handle)
{
- int i;
+ struct dimm_info *dimm;
- for (i = 0; i < mci->tot_dimms; i++) {
- if (mci->dimms[i]->smbios_handle == handle)
- return i;
+ mci_for_each_dimm(mci, dimm) {
+ if (dimm->smbios_handle == handle)
+ return dimm->idx;
}
+
return -1;
}
diff --git a/drivers/edac/i5100_edac.c b/drivers/edac/i5100_edac.c
index 134586753311..0ddc41e47a96 100644
--- a/drivers/edac/i5100_edac.c
+++ b/drivers/edac/i5100_edac.c
@@ -846,20 +846,17 @@ static void i5100_init_interleaving(struct pci_dev *pdev,
static void i5100_init_csrows(struct mem_ctl_info *mci)
{
- int i;
struct i5100_priv *priv = mci->pvt_info;
+ struct dimm_info *dimm;
- for (i = 0; i < mci->tot_dimms; i++) {
- struct dimm_info *dimm;
- const unsigned long npages = i5100_npages(mci, i);
- const unsigned int chan = i5100_csrow_to_chan(mci, i);
- const unsigned int rank = i5100_csrow_to_rank(mci, i);
+ mci_for_each_dimm(mci, dimm) {
+ const unsigned long npages = i5100_npages(mci, dimm->idx);
+ const unsigned int chan = i5100_csrow_to_chan(mci, dimm->idx);
+ const unsigned int rank = i5100_csrow_to_rank(mci, dimm->idx);
if (!npages)
continue;
- dimm = edac_get_dimm(mci, chan, rank, 0);
-
dimm->nr_pages = npages;
dimm->grain = 32;
dimm->dtype = (priv->mtr[chan][rank].width == 4) ?
diff --git a/include/linux/edac.h b/include/linux/edac.h
index f4ebb14bc406..31f99d48b024 100644
--- a/include/linux/edac.h
+++ b/include/linux/edac.h
@@ -599,6 +599,13 @@ struct mem_ctl_info {
u16 fake_inject_count;
};
+#define mci_for_each_dimm(mci, dimm) \
+ for ((dimm) = (mci)->dimms[0]; \
+ (dimm); \
+ (dimm) = (dimm)->idx + 1 < (mci)->tot_dimms \
+ ? (mci)->dimms[(dimm)->idx + 1] \
+ : NULL)
+
/**
* edac_get_dimm_by_index - Get DIMM info at @index from a memory
* controller
--
2.24.1