edac: Create a dimm struct and move the labels into it

The way a DIMM is currently represented implies that they're
linked into a per-csrow struct. However, some drivers don't see
csrows, as they're ridden behind some chip like the AMB's
on FBDIMM's, for example.

This forced drivers to fake^Wvirtualize a csrow struct, and to create
a mess under csrow/channel original's concept.

Move the DIMM labels into a per-DIMM struct, and add there
the real location of the socket, in terms of csrow/channel.
Latter patches will modify the location to properly represent the
memory architecture.

All other drivers will use a per-csrow type of location.
Some of those drivers will require a latter conversion, as
they also fake the csrows internally.

TODO: While this patch doesn't change the existing behavior, on
csrows-based memory controllers, a csrow/channel pair points to a memory
rank. There's a known bug at the EDAC core that allows having different
labels for the same DIMM, if it has more than one rank. A latter patch
is need to merge the several ranks for a DIMM into the same dimm_info
struct, in order to avoid having different labels for the same DIMM.

The edac_mc_alloc() will now contain a per-dimm initialization loop that
will be changed by latter patches in order to match other types of
memory architectures.

Reviewed-by: Aristeu Rozanski <arozansk@redhat.com>
Reviewed-by: Borislav Petkov <borislav.petkov@amd.com>
Cc: Doug Thompson <norsk5@yahoo.com>
Cc: Ranganathan Desikan <ravi@jetztechnologies.com>
Cc: "Arvind R." <arvino55@gmail.com>
Cc: "Niklas Söderlund" <niklas.soderlund@ericsson.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Mauro Carvalho Chehab 2012-01-27 14:12:32 -03:00
parent 76e10d158e
commit a7d7d2e1a0
7 changed files with 72 additions and 32 deletions

View File

@ -44,7 +44,7 @@ static void edac_mc_dump_channel(struct rank_info *chan)
debugf4("\tchannel = %p\n", chan);
debugf4("\tchannel->chan_idx = %d\n", chan->chan_idx);
debugf4("\tchannel->ce_count = %d\n", chan->ce_count);
debugf4("\tchannel->label = '%s'\n", chan->label);
debugf4("\tchannel->label = '%s'\n", chan->dimm->label);
debugf4("\tchannel->csrow = %p\n\n", chan->csrow);
}
@ -157,6 +157,7 @@ struct mem_ctl_info *edac_mc_alloc(unsigned sz_pvt, unsigned nr_csrows,
struct mem_ctl_info *mci;
struct csrow_info *csi, *csrow;
struct rank_info *chi, *chp, *chan;
struct dimm_info *dimm;
void *pvt;
unsigned size;
int row, chn;
@ -170,7 +171,8 @@ struct mem_ctl_info *edac_mc_alloc(unsigned sz_pvt, unsigned nr_csrows,
mci = (struct mem_ctl_info *)0;
csi = edac_align_ptr(&mci[1], sizeof(*csi));
chi = edac_align_ptr(&csi[nr_csrows], sizeof(*chi));
pvt = edac_align_ptr(&chi[nr_chans * nr_csrows], sz_pvt);
dimm = edac_align_ptr(&chi[nr_chans * nr_csrows], sizeof(*dimm));
pvt = edac_align_ptr(&dimm[nr_chans * nr_csrows], sz_pvt);
size = ((unsigned long)pvt) + sz_pvt;
mci = kzalloc(size, GFP_KERNEL);
@ -182,14 +184,22 @@ struct mem_ctl_info *edac_mc_alloc(unsigned sz_pvt, unsigned nr_csrows,
*/
csi = (struct csrow_info *)(((char *)mci) + ((unsigned long)csi));
chi = (struct rank_info *)(((char *)mci) + ((unsigned long)chi));
dimm = (struct dimm_info *)(((char *)mci) + ((unsigned long)dimm));
pvt = sz_pvt ? (((char *)mci) + ((unsigned long)pvt)) : NULL;
/* setup index and various internal pointers */
mci->mc_idx = edac_index;
mci->csrows = csi;
mci->dimms = dimm;
mci->pvt_info = pvt;
mci->nr_csrows = nr_csrows;
/*
* For now, assumes that a per-csrow arrangement for dimms.
* This will be latter changed.
*/
dimm = mci->dimms;
for (row = 0; row < nr_csrows; row++) {
csrow = &csi[row];
csrow->csrow_idx = row;
@ -202,6 +212,12 @@ struct mem_ctl_info *edac_mc_alloc(unsigned sz_pvt, unsigned nr_csrows,
chan = &chp[chn];
chan->chan_idx = chn;
chan->csrow = csrow;
mci->csrows[row].channels[chn].dimm = dimm;
dimm->csrow = row;
dimm->csrow_channel = chn;
dimm++;
mci->nr_dimms++;
}
}
@ -678,6 +694,7 @@ void edac_mc_handle_ce(struct mem_ctl_info *mci,
int row, int channel, const char *msg)
{
unsigned long remapped_page;
char *label = NULL;
debugf3("MC%d: %s()\n", mci->mc_idx, __func__);
@ -701,6 +718,8 @@ void edac_mc_handle_ce(struct mem_ctl_info *mci,
return;
}
label = mci->csrows[row].channels[channel].dimm->label;
if (edac_mc_get_log_ce())
/* FIXME - put in DIMM location */
edac_mc_printk(mci, KERN_WARNING,
@ -708,7 +727,7 @@ void edac_mc_handle_ce(struct mem_ctl_info *mci,
"0x%lx, row %d, channel %d, label \"%s\": %s\n",
page_frame_number, offset_in_page,
mci->csrows[row].grain, syndrome, row, channel,
mci->csrows[row].channels[channel].label, msg);
label, msg);
mci->ce_count++;
mci->csrows[row].ce_count++;
@ -754,6 +773,7 @@ void edac_mc_handle_ue(struct mem_ctl_info *mci,
char *pos = labels;
int chan;
int chars;
char *label = NULL;
debugf3("MC%d: %s()\n", mci->mc_idx, __func__);
@ -767,15 +787,15 @@ void edac_mc_handle_ue(struct mem_ctl_info *mci,
return;
}
chars = snprintf(pos, len + 1, "%s",
mci->csrows[row].channels[0].label);
label = mci->csrows[row].channels[0].dimm->label;
chars = snprintf(pos, len + 1, "%s", label);
len -= chars;
pos += chars;
for (chan = 1; (chan < mci->csrows[row].nr_channels) && (len > 0);
chan++) {
chars = snprintf(pos, len + 1, ":%s",
mci->csrows[row].channels[chan].label);
label = mci->csrows[row].channels[chan].dimm->label;
chars = snprintf(pos, len + 1, ":%s", label);
len -= chars;
pos += chars;
}
@ -824,6 +844,7 @@ void edac_mc_handle_fbd_ue(struct mem_ctl_info *mci,
char labels[len + 1];
char *pos = labels;
int chars;
char *label;
if (csrow >= mci->nr_csrows) {
/* something is wrong */
@ -858,12 +879,12 @@ void edac_mc_handle_fbd_ue(struct mem_ctl_info *mci,
mci->csrows[csrow].ue_count++;
/* Generate the DIMM labels from the specified channels */
chars = snprintf(pos, len + 1, "%s",
mci->csrows[csrow].channels[channela].label);
label = mci->csrows[csrow].channels[channela].dimm->label;
chars = snprintf(pos, len + 1, "%s", label);
len -= chars;
pos += chars;
chars = snprintf(pos, len + 1, "-%s",
mci->csrows[csrow].channels[channelb].label);
mci->csrows[csrow].channels[channelb].dimm->label);
if (edac_mc_get_log_ue())
edac_mc_printk(mci, KERN_EMERG,
@ -885,6 +906,7 @@ EXPORT_SYMBOL(edac_mc_handle_fbd_ue);
void edac_mc_handle_fbd_ce(struct mem_ctl_info *mci,
unsigned int csrow, unsigned int channel, char *msg)
{
char *label = NULL;
/* Ensure boundary values */
if (csrow >= mci->nr_csrows) {
@ -904,12 +926,13 @@ void edac_mc_handle_fbd_ce(struct mem_ctl_info *mci,
return;
}
label = mci->csrows[csrow].channels[channel].dimm->label;
if (edac_mc_get_log_ce())
/* FIXME - put in DIMM location */
edac_mc_printk(mci, KERN_WARNING,
"CE row %d, channel %d, label \"%s\": %s\n",
csrow, channel,
mci->csrows[csrow].channels[channel].label, msg);
csrow, channel, label, msg);
mci->ce_count++;
mci->csrows[csrow].ce_count++;

View File

@ -170,11 +170,11 @@ static ssize_t channel_dimm_label_show(struct csrow_info *csrow,
char *data, int channel)
{
/* if field has not been initialized, there is nothing to send */
if (!csrow->channels[channel].label[0])
if (!csrow->channels[channel].dimm->label[0])
return 0;
return snprintf(data, EDAC_MC_LABEL_LEN, "%s\n",
csrow->channels[channel].label);
csrow->channels[channel].dimm->label);
}
static ssize_t channel_dimm_label_store(struct csrow_info *csrow,
@ -184,8 +184,8 @@ static ssize_t channel_dimm_label_store(struct csrow_info *csrow,
ssize_t max_size = 0;
max_size = min((ssize_t) count, (ssize_t) EDAC_MC_LABEL_LEN - 1);
strncpy(csrow->channels[channel].label, data, max_size);
csrow->channels[channel].label[max_size] = '\0';
strncpy(csrow->channels[channel].dimm->label, data, max_size);
csrow->channels[channel].dimm->label[max_size] = '\0';
return max_size;
}
@ -952,9 +952,8 @@ int edac_create_sysfs_mci_device(struct mem_ctl_info *mci)
/* CSROW error: backout what has already been registered, */
fail1:
for (i--; i >= 0; i--) {
if (csrow->nr_pages > 0) {
if (mci->csrows[i].nr_pages > 0)
kobject_put(&mci->csrows[i].kobj);
}
}
/* remove the mci instance's attributes, if any */

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@ -433,7 +433,7 @@ static void i5100_handle_ce(struct mem_ctl_info *mci,
"CE chan %d, bank %u, rank %u, syndrome 0x%lx, "
"cas %u, ras %u, csrow %u, label \"%s\": %s\n",
chan, bank, rank, syndrome, cas, ras,
csrow, mci->csrows[csrow].channels[0].label, msg);
csrow, mci->csrows[csrow].channels[0].dimm->label, msg);
mci->ce_count++;
mci->csrows[csrow].ce_count++;
@ -455,7 +455,7 @@ static void i5100_handle_ue(struct mem_ctl_info *mci,
"UE chan %d, bank %u, rank %u, syndrome 0x%lx, "
"cas %u, ras %u, csrow %u, label \"%s\": %s\n",
chan, bank, rank, syndrome, cas, ras,
csrow, mci->csrows[csrow].channels[0].label, msg);
csrow, mci->csrows[csrow].channels[0].dimm->label, msg);
mci->ue_count++;
mci->csrows[csrow].ue_count++;
@ -868,8 +868,8 @@ static void __devinit i5100_init_csrows(struct mem_ctl_info *mci)
mci->csrows[i].channels[0].chan_idx = 0;
mci->csrows[i].channels[0].ce_count = 0;
mci->csrows[i].channels[0].csrow = mci->csrows + i;
snprintf(mci->csrows[i].channels[0].label,
sizeof(mci->csrows[i].channels[0].label),
snprintf(mci->csrows[i].channels[0].dimm->label,
sizeof(mci->csrows[i].channels[0].dimm->label),
"DIMM%u", i5100_rank_to_slot(mci, chan, rank));
total_pages += npages;

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@ -746,8 +746,8 @@ static int get_dimm_config(const struct mem_ctl_info *mci)
csr->edac_mode = mode;
csr->mtype = mtype;
snprintf(csr->channels[0].label,
sizeof(csr->channels[0].label),
snprintf(csr->channels[0].dimm->label,
sizeof(csr->channels[0].dimm->label),
"CPU#%uChannel#%u_DIMM#%u",
pvt->i7core_dev->socket, i, j);

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@ -407,7 +407,7 @@ static void i82975x_init_csrows(struct mem_ctl_info *mci,
* [0-3] for dual-channel; i.e. csrow->nr_channels = 2
*/
for (chan = 0; chan < csrow->nr_channels; chan++)
strncpy(csrow->channels[chan].label,
strncpy(csrow->channels[chan].dimm->label,
labels[(index >> 1) + (chan * 2)],
EDAC_MC_LABEL_LEN);

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@ -651,8 +651,8 @@ static int get_dimm_config(const struct mem_ctl_info *mci)
csr->channels[0].chan_idx = i;
csr->channels[0].ce_count = 0;
pvt->csrow_map[i][j] = csrow;
snprintf(csr->channels[0].label,
sizeof(csr->channels[0].label),
snprintf(csr->channels[0].dimm->label,
sizeof(csr->channels[0].dimm->label),
"CPU_SrcID#%u_Channel#%u_DIMM#%u",
pvt->sbridge_dev->source_id, i, j);
last_page += npages;

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@ -312,23 +312,34 @@ enum scrub_type {
* PS - I enjoyed writing all that about as much as you enjoyed reading it.
*/
/* FIXME: add a per-dimm ce error count */
struct dimm_info {
char label[EDAC_MC_LABEL_LEN + 1]; /* DIMM label on motherboard */
unsigned memory_controller;
unsigned csrow;
unsigned csrow_channel;
};
/**
* struct rank_info - contains the information for one DIMM rank
*
* @chan_idx: channel number where the rank is (typically, 0 or 1)
* @ce_count: number of correctable errors for this rank
* @label: DIMM label. Different ranks for the same DIMM should be
* filled, on userspace, with the same label.
* FIXME: The core currently won't enforce it.
* @csrow: A pointer to the chip select row structure (the parent
* structure). The location of the rank is given by
* the (csrow->csrow_idx, chan_idx) vector.
* @dimm: A pointer to the DIMM structure, where the DIMM label
* information is stored.
*
* FIXME: Currently, the EDAC core model will assume one DIMM per rank.
* This is a bad assumption, but it makes this patch easier. Later
* patches in this series will fix this issue.
*/
struct rank_info {
int chan_idx;
u32 ce_count;
char label[EDAC_MC_LABEL_LEN + 1];
struct csrow_info *csrow; /* the parent */
struct csrow_info *csrow;
struct dimm_info *dimm;
};
struct csrow_info {
@ -428,6 +439,13 @@ struct mem_ctl_info {
int mc_idx;
int nr_csrows;
struct csrow_info *csrows;
/*
* DIMM info. Will eventually remove the entire csrows_info some day
*/
unsigned nr_dimms;
struct dimm_info *dimms;
/*
* FIXME - what about controllers on other busses? - IDs must be
* unique. dev pointer should be sufficiently unique, but