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authorMauro Carvalho Chehab <mchehab@redhat.com>2012-03-28 19:37:59 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2012-06-11 13:23:44 -0300
commitfd63312dfe70b8279618b4d77dc951b6e309ffa2 (patch)
treea6a4012398f8977d7059d3dd6e85c120c4fc50fd /drivers/edac
parent452a6bf955ee1842361742833e40e046287308f4 (diff)
downloadlinux-linaro-stable-fd63312dfe70b8279618b4d77dc951b6e309ffa2.tar.gz
edac: Move grain/dtype/edac_type calculus to be out of channel loop
The 3e7bddc changeset (edac: move dimm properties to struct memset_info) moved the calculus inside a loop. However, at those stuff are common to all channels, on several drivers, it is better to put the calculus outside the loop, to optimize the code. Reported-by: Aristeu Rozanski Filho <arozansk@redhat.com> Reviewed-by: Aristeu Rozanski <arozansk@redhat.com> Cc: Mark Gross <mark.gross@intel.com> Cc: Doug Thompson <norsk5@yahoo.com> Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Michal Marek <mmarek@suse.cz> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/edac')
-rw-r--r--drivers/edac/cpc925_edac.c54
-rw-r--r--drivers/edac/e752x_edac.c31
-rw-r--r--drivers/edac/e7xxx_edac.c32
3 files changed, 60 insertions, 57 deletions
diff --git a/drivers/edac/cpc925_edac.c b/drivers/edac/cpc925_edac.c
index 9488723f8138..3510aa446297 100644
--- a/drivers/edac/cpc925_edac.c
+++ b/drivers/edac/cpc925_edac.c
@@ -330,8 +330,9 @@ static void cpc925_init_csrows(struct mem_ctl_info *mci)
struct cpc925_mc_pdata *pdata = mci->pvt_info;
struct csrow_info *csrow;
struct dimm_info *dimm;
+ enum dev_type dtype;
int index, j;
- u32 mbmr, mbbar, bba;
+ u32 mbmr, mbbar, bba, grain;
unsigned long row_size, nr_pages, last_nr_pages = 0;
get_total_mem(pdata);
@@ -355,37 +356,36 @@ static void cpc925_init_csrows(struct mem_ctl_info *mci)
csrow->last_page = csrow->first_page + nr_pages - 1;
last_nr_pages = csrow->last_page + 1;
+ switch (csrow->nr_channels) {
+ case 1: /* Single channel */
+ grain = 32; /* four-beat burst of 32 bytes */
+ break;
+ case 2: /* Dual channel */
+ default:
+ grain = 64; /* four-beat burst of 64 bytes */
+ break;
+ }
+ switch ((mbmr & MBMR_MODE_MASK) >> MBMR_MODE_SHIFT) {
+ case 6: /* 0110, no way to differentiate X8 VS X16 */
+ case 5: /* 0101 */
+ case 8: /* 1000 */
+ dtype = DEV_X16;
+ break;
+ case 7: /* 0111 */
+ case 9: /* 1001 */
+ dtype = DEV_X8;
+ break;
+ default:
+ dtype = DEV_UNKNOWN;
+ break;
+ }
for (j = 0; j < csrow->nr_channels; j++) {
dimm = csrow->channels[j].dimm;
-
dimm->nr_pages = nr_pages / csrow->nr_channels;
dimm->mtype = MEM_RDDR;
dimm->edac_mode = EDAC_SECDED;
-
- switch (csrow->nr_channels) {
- case 1: /* Single channel */
- dimm->grain = 32; /* four-beat burst of 32 bytes */
- break;
- case 2: /* Dual channel */
- default:
- dimm->grain = 64; /* four-beat burst of 64 bytes */
- break;
- }
-
- switch ((mbmr & MBMR_MODE_MASK) >> MBMR_MODE_SHIFT) {
- case 6: /* 0110, no way to differentiate X8 VS X16 */
- case 5: /* 0101 */
- case 8: /* 1000 */
- dimm->dtype = DEV_X16;
- break;
- case 7: /* 0111 */
- case 9: /* 1001 */
- dimm->dtype = DEV_X8;
- break;
- default:
- dimm->dtype = DEV_UNKNOWN;
- break;
- }
+ dimm->grain = grain;
+ dimm->dtype = dtype;
}
}
}
diff --git a/drivers/edac/e752x_edac.c b/drivers/edac/e752x_edac.c
index d75660634b43..d1142ed8bd88 100644
--- a/drivers/edac/e752x_edac.c
+++ b/drivers/edac/e752x_edac.c
@@ -1069,6 +1069,7 @@ static void e752x_init_csrows(struct mem_ctl_info *mci, struct pci_dev *pdev,
u16 ddrcsr)
{
struct csrow_info *csrow;
+ enum edac_type edac_mode;
unsigned long last_cumul_size;
int index, mem_dev, drc_chan;
int drc_drbg; /* DRB granularity 0=64mb, 1=128mb */
@@ -1111,6 +1112,20 @@ static void e752x_init_csrows(struct mem_ctl_info *mci, struct pci_dev *pdev,
nr_pages = cumul_size - last_cumul_size;
last_cumul_size = cumul_size;
+ /*
+ * if single channel or x8 devices then SECDED
+ * if dual channel and x4 then S4ECD4ED
+ */
+ if (drc_ddim) {
+ if (drc_chan && mem_dev) {
+ edac_mode = EDAC_S4ECD4ED;
+ mci->edac_cap |= EDAC_FLAG_S4ECD4ED;
+ } else {
+ edac_mode = EDAC_SECDED;
+ mci->edac_cap |= EDAC_FLAG_SECDED;
+ }
+ } else
+ edac_mode = EDAC_NONE;
for (i = 0; i < csrow->nr_channels; i++) {
struct dimm_info *dimm = csrow->channels[i].dimm;
@@ -1119,21 +1134,7 @@ static void e752x_init_csrows(struct mem_ctl_info *mci, struct pci_dev *pdev,
dimm->grain = 1 << 12; /* 4KiB - resolution of CELOG */
dimm->mtype = MEM_RDDR; /* only one type supported */
dimm->dtype = mem_dev ? DEV_X4 : DEV_X8;
-
- /*
- * if single channel or x8 devices then SECDED
- * if dual channel and x4 then S4ECD4ED
- */
- if (drc_ddim) {
- if (drc_chan && mem_dev) {
- dimm->edac_mode = EDAC_S4ECD4ED;
- mci->edac_cap |= EDAC_FLAG_S4ECD4ED;
- } else {
- dimm->edac_mode = EDAC_SECDED;
- mci->edac_cap |= EDAC_FLAG_SECDED;
- }
- } else
- dimm->edac_mode = EDAC_NONE;
+ dimm->edac_mode = edac_mode;
}
}
}
diff --git a/drivers/edac/e7xxx_edac.c b/drivers/edac/e7xxx_edac.c
index b111266dadf3..bab31aab983d 100644
--- a/drivers/edac/e7xxx_edac.c
+++ b/drivers/edac/e7xxx_edac.c
@@ -362,6 +362,7 @@ static void e7xxx_init_csrows(struct mem_ctl_info *mci, struct pci_dev *pdev,
int drc_chan, drc_drbg, drc_ddim, mem_dev;
struct csrow_info *csrow;
struct dimm_info *dimm;
+ enum edac_type edac_mode;
pci_read_config_dword(pdev, E7XXX_DRA, &dra);
drc_chan = dual_channel_active(drc, dev_idx);
@@ -392,6 +393,21 @@ static void e7xxx_init_csrows(struct mem_ctl_info *mci, struct pci_dev *pdev,
nr_pages = cumul_size - last_cumul_size;
last_cumul_size = cumul_size;
+ /*
+ * if single channel or x8 devices then SECDED
+ * if dual channel and x4 then S4ECD4ED
+ */
+ if (drc_ddim) {
+ if (drc_chan && mem_dev) {
+ edac_mode = EDAC_S4ECD4ED;
+ mci->edac_cap |= EDAC_FLAG_S4ECD4ED;
+ } else {
+ edac_mode = EDAC_SECDED;
+ mci->edac_cap |= EDAC_FLAG_SECDED;
+ }
+ } else
+ edac_mode = EDAC_NONE;
+
for (j = 0; j < drc_chan + 1; j++) {
dimm = csrow->channels[j].dimm;
@@ -399,21 +415,7 @@ static void e7xxx_init_csrows(struct mem_ctl_info *mci, struct pci_dev *pdev,
dimm->grain = 1 << 12; /* 4KiB - resolution of CELOG */
dimm->mtype = MEM_RDDR; /* only one type supported */
dimm->dtype = mem_dev ? DEV_X4 : DEV_X8;
-
- /*
- * if single channel or x8 devices then SECDED
- * if dual channel and x4 then S4ECD4ED
- */
- if (drc_ddim) {
- if (drc_chan && mem_dev) {
- dimm->edac_mode = EDAC_S4ECD4ED;
- mci->edac_cap |= EDAC_FLAG_S4ECD4ED;
- } else {
- dimm->edac_mode = EDAC_SECDED;
- mci->edac_cap |= EDAC_FLAG_SECDED;
- }
- } else
- dimm->edac_mode = EDAC_NONE;
+ dimm->edac_mode = edac_mode;
}
}
}