From 86f279c3b3b2df4a25216eb34df3750f1cf9d79f Mon Sep 17 00:00:00 2001 From: Borislav Petkov Date: Wed, 12 Sep 2012 19:00:38 +0200 Subject: [PATCH] amd64_edac: Fix csrows size and pages computation Make sure code pays attention to K8 having only one DCT, reformat and cleanup code, correct debug messages, remove unused code. Signed-off-by: Borislav Petkov --- drivers/edac/amd64_edac.c | 48 ++++++++++++++++++++++----------------- 1 file changed, 27 insertions(+), 21 deletions(-) diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c index 0dacf8f736cb..36f1466177b5 100644 --- a/drivers/edac/amd64_edac.c +++ b/drivers/edac/amd64_edac.c @@ -2090,6 +2090,7 @@ static u32 amd64_csrow_nr_pages(struct amd64_pvt *pvt, u8 dct, int csrow_nr) u32 cs_mode, nr_pages; u32 dbam = dct ? pvt->dbam1 : pvt->dbam0; + /* * The math on this doesn't look right on the surface because x/2*4 can * be simplified to x*2 but this expression makes use of the fact that @@ -2101,9 +2102,9 @@ static u32 amd64_csrow_nr_pages(struct amd64_pvt *pvt, u8 dct, int csrow_nr) nr_pages = pvt->ops->dbam_to_cs(pvt, dct, cs_mode) << (20 - PAGE_SHIFT); - edac_dbg(0, " (csrow=%d) DBAM map index= %d\n", csrow_nr, cs_mode); - edac_dbg(0, " nr_pages/channel= %u channel-count = %d\n", - nr_pages, pvt->channel_count); + edac_dbg(0, "csrow: %d, channel: %d, DBAM idx: %d\n", + csrow_nr, dct, cs_mode); + edac_dbg(0, "nr_pages/channel: %u\n", nr_pages); return nr_pages; } @@ -2114,15 +2115,14 @@ static u32 amd64_csrow_nr_pages(struct amd64_pvt *pvt, u8 dct, int csrow_nr) */ static int init_csrows(struct mem_ctl_info *mci) { + struct amd64_pvt *pvt = mci->pvt_info; struct csrow_info *csrow; struct dimm_info *dimm; - struct amd64_pvt *pvt = mci->pvt_info; - u64 base, mask; - u32 val; - int i, j, empty = 1; - enum mem_type mtype; enum edac_type edac_mode; + enum mem_type mtype; + int i, j, empty = 1; int nr_pages = 0; + u32 val; amd64_read_pci_cfg(pvt->F3, NBCFG, &val); @@ -2132,29 +2132,35 @@ static int init_csrows(struct mem_ctl_info *mci) pvt->mc_node_id, val, !!(val & NBCFG_CHIPKILL), !!(val & NBCFG_ECC_ENABLE)); + /* + * We iterate over DCT0 here but we look at DCT1 in parallel, if needed. + */ for_each_chip_select(i, 0, pvt) { - csrow = mci->csrows[i]; + bool row_dct0 = !!csrow_enabled(i, 0, pvt); + bool row_dct1 = false; - if (!csrow_enabled(i, 0, pvt) && !csrow_enabled(i, 1, pvt)) { - edac_dbg(1, "----CSROW %d VALID for MC node %d\n", - i, pvt->mc_node_id); + if (boot_cpu_data.x86 != 0xf) + row_dct1 = !!csrow_enabled(i, 1, pvt); + + if (!row_dct0 && !row_dct1) continue; - } + csrow = mci->csrows[i]; empty = 0; - if (csrow_enabled(i, 0, pvt)) + + edac_dbg(1, "MC node: %d, csrow: %d\n", + pvt->mc_node_id, i); + + if (row_dct0) nr_pages = amd64_csrow_nr_pages(pvt, 0, i); - if (csrow_enabled(i, 1, pvt)) - nr_pages += amd64_csrow_nr_pages(pvt, 1, i); - get_cs_base_and_mask(pvt, i, 0, &base, &mask); - /* 8 bytes of resolution */ + /* K8 has only one DCT */ + if (boot_cpu_data.x86 != 0xf && row_dct1) + nr_pages += amd64_csrow_nr_pages(pvt, 1, i); mtype = amd64_determine_memory_type(pvt, i); - edac_dbg(1, " for MC node %d csrow %d:\n", pvt->mc_node_id, i); - edac_dbg(1, " nr_pages: %u\n", - nr_pages * pvt->channel_count); + edac_dbg(1, "Total csrow%d pages: %u\n", i, nr_pages); /* * determine whether CHIPKILL or JUST ECC or NO ECC is operating -- 2.39.5