From fd63312dfe70b8279618b4d77dc951b6e309ffa2 Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Wed, 28 Mar 2012 19:37:59 -0300 Subject: 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 Reviewed-by: Aristeu Rozanski Cc: Mark Gross Cc: Doug Thompson Cc: Dmitry Eremin-Solenikov Cc: Benjamin Herrenschmidt Cc: Michal Marek Signed-off-by: Mauro Carvalho Chehab --- drivers/edac/cpc925_edac.c | 54 +++++++++++++++++++++++----------------------- drivers/edac/e752x_edac.c | 31 +++++++++++++------------- drivers/edac/e7xxx_edac.c | 32 ++++++++++++++------------- 3 files changed, 60 insertions(+), 57 deletions(-) (limited to 'drivers/edac') diff --git a/drivers/edac/cpc925_edac.c b/drivers/edac/cpc925_edac.c index 9488723..3510aa4 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 d756606..d1142ed 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 b111266..bab31aa 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; } } } -- cgit v1.1