148764e41SBenjamin Herrenschmidt /* 248764e41SBenjamin Herrenschmidt * Cell MIC driver for ECC counting 348764e41SBenjamin Herrenschmidt * 448764e41SBenjamin Herrenschmidt * Copyright 2007 Benjamin Herrenschmidt, IBM Corp. 548764e41SBenjamin Herrenschmidt * <benh@kernel.crashing.org> 648764e41SBenjamin Herrenschmidt * 748764e41SBenjamin Herrenschmidt * This file may be distributed under the terms of the 848764e41SBenjamin Herrenschmidt * GNU General Public License. 948764e41SBenjamin Herrenschmidt */ 1048764e41SBenjamin Herrenschmidt #undef DEBUG 1148764e41SBenjamin Herrenschmidt 12992b692dSBenjamin Herrenschmidt #include <linux/edac.h> 1348764e41SBenjamin Herrenschmidt #include <linux/module.h> 1448764e41SBenjamin Herrenschmidt #include <linux/init.h> 1548764e41SBenjamin Herrenschmidt #include <linux/platform_device.h> 1648764e41SBenjamin Herrenschmidt #include <linux/stop_machine.h> 1748764e41SBenjamin Herrenschmidt #include <linux/io.h> 1848764e41SBenjamin Herrenschmidt #include <asm/machdep.h> 1948764e41SBenjamin Herrenschmidt #include <asm/cell-regs.h> 2048764e41SBenjamin Herrenschmidt 2148764e41SBenjamin Herrenschmidt #include "edac_core.h" 2248764e41SBenjamin Herrenschmidt 2348764e41SBenjamin Herrenschmidt struct cell_edac_priv 2448764e41SBenjamin Herrenschmidt { 2548764e41SBenjamin Herrenschmidt struct cbe_mic_tm_regs __iomem *regs; 2648764e41SBenjamin Herrenschmidt int node; 2748764e41SBenjamin Herrenschmidt int chanmask; 2848764e41SBenjamin Herrenschmidt #ifdef DEBUG 2948764e41SBenjamin Herrenschmidt u64 prev_fir; 3048764e41SBenjamin Herrenschmidt #endif 3148764e41SBenjamin Herrenschmidt }; 3248764e41SBenjamin Herrenschmidt 3348764e41SBenjamin Herrenschmidt static void cell_edac_count_ce(struct mem_ctl_info *mci, int chan, u64 ar) 3448764e41SBenjamin Herrenschmidt { 3548764e41SBenjamin Herrenschmidt struct cell_edac_priv *priv = mci->pvt_info; 3648764e41SBenjamin Herrenschmidt struct csrow_info *csrow = &mci->csrows[0]; 37c134fd86SMaxim Shchetynin unsigned long address, pfn, offset, syndrome; 3848764e41SBenjamin Herrenschmidt 394712fff9SStephen Rothwell dev_dbg(mci->dev, "ECC CE err on node %d, channel %d, ar = 0x%016llx\n", 4048764e41SBenjamin Herrenschmidt priv->node, chan, ar); 4148764e41SBenjamin Herrenschmidt 4248764e41SBenjamin Herrenschmidt /* Address decoding is likely a bit bogus, to dbl check */ 4348764e41SBenjamin Herrenschmidt address = (ar & 0xffffffffe0000000ul) >> 29; 4448764e41SBenjamin Herrenschmidt if (priv->chanmask == 0x3) 4548764e41SBenjamin Herrenschmidt address = (address << 1) | chan; 4648764e41SBenjamin Herrenschmidt pfn = address >> PAGE_SHIFT; 4748764e41SBenjamin Herrenschmidt offset = address & ~PAGE_MASK; 48c134fd86SMaxim Shchetynin syndrome = (ar & 0x000000001fe00000ul) >> 21; 4948764e41SBenjamin Herrenschmidt 50b595076aSUwe Kleine-König /* TODO: Decoding of the error address */ 5148764e41SBenjamin Herrenschmidt edac_mc_handle_ce(mci, csrow->first_page + pfn, offset, 52c134fd86SMaxim Shchetynin syndrome, 0, chan, ""); 5348764e41SBenjamin Herrenschmidt } 5448764e41SBenjamin Herrenschmidt 5548764e41SBenjamin Herrenschmidt static void cell_edac_count_ue(struct mem_ctl_info *mci, int chan, u64 ar) 5648764e41SBenjamin Herrenschmidt { 5748764e41SBenjamin Herrenschmidt struct cell_edac_priv *priv = mci->pvt_info; 5848764e41SBenjamin Herrenschmidt struct csrow_info *csrow = &mci->csrows[0]; 5948764e41SBenjamin Herrenschmidt unsigned long address, pfn, offset; 6048764e41SBenjamin Herrenschmidt 614712fff9SStephen Rothwell dev_dbg(mci->dev, "ECC UE err on node %d, channel %d, ar = 0x%016llx\n", 6248764e41SBenjamin Herrenschmidt priv->node, chan, ar); 6348764e41SBenjamin Herrenschmidt 6448764e41SBenjamin Herrenschmidt /* Address decoding is likely a bit bogus, to dbl check */ 6548764e41SBenjamin Herrenschmidt address = (ar & 0xffffffffe0000000ul) >> 29; 6648764e41SBenjamin Herrenschmidt if (priv->chanmask == 0x3) 6748764e41SBenjamin Herrenschmidt address = (address << 1) | chan; 6848764e41SBenjamin Herrenschmidt pfn = address >> PAGE_SHIFT; 6948764e41SBenjamin Herrenschmidt offset = address & ~PAGE_MASK; 7048764e41SBenjamin Herrenschmidt 71b595076aSUwe Kleine-König /* TODO: Decoding of the error address */ 7248764e41SBenjamin Herrenschmidt edac_mc_handle_ue(mci, csrow->first_page + pfn, offset, 0, ""); 7348764e41SBenjamin Herrenschmidt } 7448764e41SBenjamin Herrenschmidt 7548764e41SBenjamin Herrenschmidt static void cell_edac_check(struct mem_ctl_info *mci) 7648764e41SBenjamin Herrenschmidt { 7748764e41SBenjamin Herrenschmidt struct cell_edac_priv *priv = mci->pvt_info; 7848764e41SBenjamin Herrenschmidt u64 fir, addreg, clear = 0; 7948764e41SBenjamin Herrenschmidt 8048764e41SBenjamin Herrenschmidt fir = in_be64(&priv->regs->mic_fir); 8148764e41SBenjamin Herrenschmidt #ifdef DEBUG 8248764e41SBenjamin Herrenschmidt if (fir != priv->prev_fir) { 8348764e41SBenjamin Herrenschmidt dev_dbg(mci->dev, "fir change : 0x%016lx\n", fir); 8448764e41SBenjamin Herrenschmidt priv->prev_fir = fir; 8548764e41SBenjamin Herrenschmidt } 8648764e41SBenjamin Herrenschmidt #endif 8748764e41SBenjamin Herrenschmidt if ((priv->chanmask & 0x1) && (fir & CBE_MIC_FIR_ECC_SINGLE_0_ERR)) { 8848764e41SBenjamin Herrenschmidt addreg = in_be64(&priv->regs->mic_df_ecc_address_0); 8948764e41SBenjamin Herrenschmidt clear |= CBE_MIC_FIR_ECC_SINGLE_0_RESET; 9048764e41SBenjamin Herrenschmidt cell_edac_count_ce(mci, 0, addreg); 9148764e41SBenjamin Herrenschmidt } 9248764e41SBenjamin Herrenschmidt if ((priv->chanmask & 0x2) && (fir & CBE_MIC_FIR_ECC_SINGLE_1_ERR)) { 9348764e41SBenjamin Herrenschmidt addreg = in_be64(&priv->regs->mic_df_ecc_address_1); 9448764e41SBenjamin Herrenschmidt clear |= CBE_MIC_FIR_ECC_SINGLE_1_RESET; 9548764e41SBenjamin Herrenschmidt cell_edac_count_ce(mci, 1, addreg); 9648764e41SBenjamin Herrenschmidt } 9748764e41SBenjamin Herrenschmidt if ((priv->chanmask & 0x1) && (fir & CBE_MIC_FIR_ECC_MULTI_0_ERR)) { 9848764e41SBenjamin Herrenschmidt addreg = in_be64(&priv->regs->mic_df_ecc_address_0); 9948764e41SBenjamin Herrenschmidt clear |= CBE_MIC_FIR_ECC_MULTI_0_RESET; 10048764e41SBenjamin Herrenschmidt cell_edac_count_ue(mci, 0, addreg); 10148764e41SBenjamin Herrenschmidt } 10248764e41SBenjamin Herrenschmidt if ((priv->chanmask & 0x2) && (fir & CBE_MIC_FIR_ECC_MULTI_1_ERR)) { 10348764e41SBenjamin Herrenschmidt addreg = in_be64(&priv->regs->mic_df_ecc_address_1); 10448764e41SBenjamin Herrenschmidt clear |= CBE_MIC_FIR_ECC_MULTI_1_RESET; 10548764e41SBenjamin Herrenschmidt cell_edac_count_ue(mci, 1, addreg); 10648764e41SBenjamin Herrenschmidt } 10748764e41SBenjamin Herrenschmidt 10848764e41SBenjamin Herrenschmidt /* The procedure for clearing FIR bits is a bit ... weird */ 10948764e41SBenjamin Herrenschmidt if (clear) { 11048764e41SBenjamin Herrenschmidt fir &= ~(CBE_MIC_FIR_ECC_ERR_MASK | CBE_MIC_FIR_ECC_SET_MASK); 11148764e41SBenjamin Herrenschmidt fir |= CBE_MIC_FIR_ECC_RESET_MASK; 11248764e41SBenjamin Herrenschmidt fir &= ~clear; 11348764e41SBenjamin Herrenschmidt out_be64(&priv->regs->mic_fir, fir); 11448764e41SBenjamin Herrenschmidt (void)in_be64(&priv->regs->mic_fir); 11548764e41SBenjamin Herrenschmidt 11648764e41SBenjamin Herrenschmidt mb(); /* sync up */ 11748764e41SBenjamin Herrenschmidt #ifdef DEBUG 11848764e41SBenjamin Herrenschmidt fir = in_be64(&priv->regs->mic_fir); 11948764e41SBenjamin Herrenschmidt dev_dbg(mci->dev, "fir clear : 0x%016lx\n", fir); 12048764e41SBenjamin Herrenschmidt #endif 12148764e41SBenjamin Herrenschmidt } 12248764e41SBenjamin Herrenschmidt } 12348764e41SBenjamin Herrenschmidt 12448764e41SBenjamin Herrenschmidt static void __devinit cell_edac_init_csrows(struct mem_ctl_info *mci) 12548764e41SBenjamin Herrenschmidt { 12648764e41SBenjamin Herrenschmidt struct csrow_info *csrow = &mci->csrows[0]; 127*084a4fccSMauro Carvalho Chehab struct dimm_info *dimm; 12848764e41SBenjamin Herrenschmidt struct cell_edac_priv *priv = mci->pvt_info; 12948764e41SBenjamin Herrenschmidt struct device_node *np; 130*084a4fccSMauro Carvalho Chehab int j; 13148764e41SBenjamin Herrenschmidt 13248764e41SBenjamin Herrenschmidt for (np = NULL; 13348764e41SBenjamin Herrenschmidt (np = of_find_node_by_name(np, "memory")) != NULL;) { 13448764e41SBenjamin Herrenschmidt struct resource r; 13548764e41SBenjamin Herrenschmidt 13648764e41SBenjamin Herrenschmidt /* We "know" that the Cell firmware only creates one entry 13748764e41SBenjamin Herrenschmidt * in the "memory" nodes. If that changes, this code will 13848764e41SBenjamin Herrenschmidt * need to be adapted. 13948764e41SBenjamin Herrenschmidt */ 14048764e41SBenjamin Herrenschmidt if (of_address_to_resource(np, 0, &r)) 14148764e41SBenjamin Herrenschmidt continue; 14248764e41SBenjamin Herrenschmidt if (of_node_to_nid(np) != priv->node) 14348764e41SBenjamin Herrenschmidt continue; 14448764e41SBenjamin Herrenschmidt csrow->first_page = r.start >> PAGE_SHIFT; 14528f65c11SJoe Perches csrow->nr_pages = resource_size(&r) >> PAGE_SHIFT; 14648764e41SBenjamin Herrenschmidt csrow->last_page = csrow->first_page + csrow->nr_pages - 1; 147*084a4fccSMauro Carvalho Chehab 148*084a4fccSMauro Carvalho Chehab for (j = 0; j < csrow->nr_channels; j++) { 149*084a4fccSMauro Carvalho Chehab dimm = csrow->channels[j].dimm; 150*084a4fccSMauro Carvalho Chehab dimm->mtype = MEM_XDR; 151*084a4fccSMauro Carvalho Chehab dimm->edac_mode = EDAC_SECDED; 152*084a4fccSMauro Carvalho Chehab } 15348764e41SBenjamin Herrenschmidt dev_dbg(mci->dev, 15448764e41SBenjamin Herrenschmidt "Initialized on node %d, chanmask=0x%x," 15548764e41SBenjamin Herrenschmidt " first_page=0x%lx, nr_pages=0x%x\n", 15648764e41SBenjamin Herrenschmidt priv->node, priv->chanmask, 15748764e41SBenjamin Herrenschmidt csrow->first_page, csrow->nr_pages); 15848764e41SBenjamin Herrenschmidt break; 15948764e41SBenjamin Herrenschmidt } 16048764e41SBenjamin Herrenschmidt } 16148764e41SBenjamin Herrenschmidt 16248764e41SBenjamin Herrenschmidt static int __devinit cell_edac_probe(struct platform_device *pdev) 16348764e41SBenjamin Herrenschmidt { 16448764e41SBenjamin Herrenschmidt struct cbe_mic_tm_regs __iomem *regs; 16548764e41SBenjamin Herrenschmidt struct mem_ctl_info *mci; 16648764e41SBenjamin Herrenschmidt struct cell_edac_priv *priv; 16748764e41SBenjamin Herrenschmidt u64 reg; 16848764e41SBenjamin Herrenschmidt int rc, chanmask; 16948764e41SBenjamin Herrenschmidt 17048764e41SBenjamin Herrenschmidt regs = cbe_get_cpu_mic_tm_regs(cbe_node_to_cpu(pdev->id)); 17148764e41SBenjamin Herrenschmidt if (regs == NULL) 17248764e41SBenjamin Herrenschmidt return -ENODEV; 17348764e41SBenjamin Herrenschmidt 174992b692dSBenjamin Herrenschmidt edac_op_state = EDAC_OPSTATE_POLL; 175992b692dSBenjamin Herrenschmidt 17648764e41SBenjamin Herrenschmidt /* Get channel population */ 17748764e41SBenjamin Herrenschmidt reg = in_be64(®s->mic_mnt_cfg); 1784712fff9SStephen Rothwell dev_dbg(&pdev->dev, "MIC_MNT_CFG = 0x%016llx\n", reg); 17948764e41SBenjamin Herrenschmidt chanmask = 0; 18048764e41SBenjamin Herrenschmidt if (reg & CBE_MIC_MNT_CFG_CHAN_0_POP) 18148764e41SBenjamin Herrenschmidt chanmask |= 0x1; 18248764e41SBenjamin Herrenschmidt if (reg & CBE_MIC_MNT_CFG_CHAN_1_POP) 18348764e41SBenjamin Herrenschmidt chanmask |= 0x2; 18448764e41SBenjamin Herrenschmidt if (chanmask == 0) { 18548764e41SBenjamin Herrenschmidt dev_warn(&pdev->dev, 18648764e41SBenjamin Herrenschmidt "Yuck ! No channel populated ? Aborting !\n"); 18748764e41SBenjamin Herrenschmidt return -ENODEV; 18848764e41SBenjamin Herrenschmidt } 1894712fff9SStephen Rothwell dev_dbg(&pdev->dev, "Initial FIR = 0x%016llx\n", 19048764e41SBenjamin Herrenschmidt in_be64(®s->mic_fir)); 19148764e41SBenjamin Herrenschmidt 19248764e41SBenjamin Herrenschmidt /* Allocate & init EDAC MC data structure */ 19348764e41SBenjamin Herrenschmidt mci = edac_mc_alloc(sizeof(struct cell_edac_priv), 1, 19448764e41SBenjamin Herrenschmidt chanmask == 3 ? 2 : 1, pdev->id); 19548764e41SBenjamin Herrenschmidt if (mci == NULL) 19648764e41SBenjamin Herrenschmidt return -ENOMEM; 19748764e41SBenjamin Herrenschmidt priv = mci->pvt_info; 19848764e41SBenjamin Herrenschmidt priv->regs = regs; 19948764e41SBenjamin Herrenschmidt priv->node = pdev->id; 20048764e41SBenjamin Herrenschmidt priv->chanmask = chanmask; 20148764e41SBenjamin Herrenschmidt mci->dev = &pdev->dev; 20248764e41SBenjamin Herrenschmidt mci->mtype_cap = MEM_FLAG_XDR; 20348764e41SBenjamin Herrenschmidt mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_EC | EDAC_FLAG_SECDED; 20448764e41SBenjamin Herrenschmidt mci->edac_cap = EDAC_FLAG_EC | EDAC_FLAG_SECDED; 20548764e41SBenjamin Herrenschmidt mci->mod_name = "cell_edac"; 20648764e41SBenjamin Herrenschmidt mci->ctl_name = "MIC"; 207031d5518SKay Sievers mci->dev_name = dev_name(&pdev->dev); 20848764e41SBenjamin Herrenschmidt mci->edac_check = cell_edac_check; 20948764e41SBenjamin Herrenschmidt cell_edac_init_csrows(mci); 21048764e41SBenjamin Herrenschmidt 21148764e41SBenjamin Herrenschmidt /* Register with EDAC core */ 21248764e41SBenjamin Herrenschmidt rc = edac_mc_add_mc(mci); 21348764e41SBenjamin Herrenschmidt if (rc) { 21448764e41SBenjamin Herrenschmidt dev_err(&pdev->dev, "failed to register with EDAC core\n"); 21548764e41SBenjamin Herrenschmidt edac_mc_free(mci); 21648764e41SBenjamin Herrenschmidt return rc; 21748764e41SBenjamin Herrenschmidt } 21848764e41SBenjamin Herrenschmidt 21948764e41SBenjamin Herrenschmidt return 0; 22048764e41SBenjamin Herrenschmidt } 22148764e41SBenjamin Herrenschmidt 22248764e41SBenjamin Herrenschmidt static int __devexit cell_edac_remove(struct platform_device *pdev) 22348764e41SBenjamin Herrenschmidt { 22448764e41SBenjamin Herrenschmidt struct mem_ctl_info *mci = edac_mc_del_mc(&pdev->dev); 22548764e41SBenjamin Herrenschmidt if (mci) 22648764e41SBenjamin Herrenschmidt edac_mc_free(mci); 22748764e41SBenjamin Herrenschmidt return 0; 22848764e41SBenjamin Herrenschmidt } 22948764e41SBenjamin Herrenschmidt 23048764e41SBenjamin Herrenschmidt static struct platform_driver cell_edac_driver = { 23148764e41SBenjamin Herrenschmidt .driver = { 23248764e41SBenjamin Herrenschmidt .name = "cbe-mic", 23348764e41SBenjamin Herrenschmidt .owner = THIS_MODULE, 23448764e41SBenjamin Herrenschmidt }, 23548764e41SBenjamin Herrenschmidt .probe = cell_edac_probe, 23620ea8fadSMike Frysinger .remove = __devexit_p(cell_edac_remove), 23748764e41SBenjamin Herrenschmidt }; 23848764e41SBenjamin Herrenschmidt 23948764e41SBenjamin Herrenschmidt static int __init cell_edac_init(void) 24048764e41SBenjamin Herrenschmidt { 24148764e41SBenjamin Herrenschmidt /* Sanity check registers data structure */ 24248764e41SBenjamin Herrenschmidt BUILD_BUG_ON(offsetof(struct cbe_mic_tm_regs, 24348764e41SBenjamin Herrenschmidt mic_df_ecc_address_0) != 0xf8); 24448764e41SBenjamin Herrenschmidt BUILD_BUG_ON(offsetof(struct cbe_mic_tm_regs, 24548764e41SBenjamin Herrenschmidt mic_df_ecc_address_1) != 0x1b8); 24648764e41SBenjamin Herrenschmidt BUILD_BUG_ON(offsetof(struct cbe_mic_tm_regs, 24748764e41SBenjamin Herrenschmidt mic_df_config) != 0x218); 24848764e41SBenjamin Herrenschmidt BUILD_BUG_ON(offsetof(struct cbe_mic_tm_regs, 24948764e41SBenjamin Herrenschmidt mic_fir) != 0x230); 25048764e41SBenjamin Herrenschmidt BUILD_BUG_ON(offsetof(struct cbe_mic_tm_regs, 25148764e41SBenjamin Herrenschmidt mic_mnt_cfg) != 0x210); 25248764e41SBenjamin Herrenschmidt BUILD_BUG_ON(offsetof(struct cbe_mic_tm_regs, 25348764e41SBenjamin Herrenschmidt mic_exc) != 0x208); 25448764e41SBenjamin Herrenschmidt 25548764e41SBenjamin Herrenschmidt return platform_driver_register(&cell_edac_driver); 25648764e41SBenjamin Herrenschmidt } 25748764e41SBenjamin Herrenschmidt 25848764e41SBenjamin Herrenschmidt static void __exit cell_edac_exit(void) 25948764e41SBenjamin Herrenschmidt { 26048764e41SBenjamin Herrenschmidt platform_driver_unregister(&cell_edac_driver); 26148764e41SBenjamin Herrenschmidt } 26248764e41SBenjamin Herrenschmidt 26348764e41SBenjamin Herrenschmidt module_init(cell_edac_init); 26448764e41SBenjamin Herrenschmidt module_exit(cell_edac_exit); 26548764e41SBenjamin Herrenschmidt 26648764e41SBenjamin Herrenschmidt MODULE_LICENSE("GPL"); 26748764e41SBenjamin Herrenschmidt MODULE_AUTHOR("Benjamin Herrenschmidt <benh@kernel.crashing.org>"); 26848764e41SBenjamin Herrenschmidt MODULE_DESCRIPTION("ECC counting for Cell MIC"); 269