From 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 12:05:51 +0200 Subject: Adding upstream version 5.10.209. Signed-off-by: Daniel Baumann --- drivers/edac/i5100_edac.c | 1230 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1230 insertions(+) create mode 100644 drivers/edac/i5100_edac.c (limited to 'drivers/edac/i5100_edac.c') diff --git a/drivers/edac/i5100_edac.c b/drivers/edac/i5100_edac.c new file mode 100644 index 000000000..324a46b84 --- /dev/null +++ b/drivers/edac/i5100_edac.c @@ -0,0 +1,1230 @@ +/* + * Intel 5100 Memory Controllers kernel module + * + * This file may be distributed under the terms of the + * GNU General Public License. + * + * This module is based on the following document: + * + * Intel 5100X Chipset Memory Controller Hub (MCH) - Datasheet + * http://download.intel.com/design/chipsets/datashts/318378.pdf + * + * The intel 5100 has two independent channels. EDAC core currently + * can not reflect this configuration so instead the chip-select + * rows for each respective channel are laid out one after another, + * the first half belonging to channel 0, the second half belonging + * to channel 1. + * + * This driver is for DDR2 DIMMs, and it uses chip select to select among the + * several ranks. However, instead of showing memories as ranks, it outputs + * them as DIMM's. An internal table creates the association between ranks + * and DIMM's. + */ +#include +#include +#include +#include +#include +#include +#include +#include + +#include "edac_module.h" + +/* register addresses */ + +/* device 16, func 1 */ +#define I5100_MC 0x40 /* Memory Control Register */ +#define I5100_MC_SCRBEN_MASK (1 << 7) +#define I5100_MC_SCRBDONE_MASK (1 << 4) +#define I5100_MS 0x44 /* Memory Status Register */ +#define I5100_SPDDATA 0x48 /* Serial Presence Detect Status Reg */ +#define I5100_SPDCMD 0x4c /* Serial Presence Detect Command Reg */ +#define I5100_TOLM 0x6c /* Top of Low Memory */ +#define I5100_MIR0 0x80 /* Memory Interleave Range 0 */ +#define I5100_MIR1 0x84 /* Memory Interleave Range 1 */ +#define I5100_AMIR_0 0x8c /* Adjusted Memory Interleave Range 0 */ +#define I5100_AMIR_1 0x90 /* Adjusted Memory Interleave Range 1 */ +#define I5100_FERR_NF_MEM 0xa0 /* MC First Non Fatal Errors */ +#define I5100_FERR_NF_MEM_M16ERR_MASK (1 << 16) +#define I5100_FERR_NF_MEM_M15ERR_MASK (1 << 15) +#define I5100_FERR_NF_MEM_M14ERR_MASK (1 << 14) +#define I5100_FERR_NF_MEM_M12ERR_MASK (1 << 12) +#define I5100_FERR_NF_MEM_M11ERR_MASK (1 << 11) +#define I5100_FERR_NF_MEM_M10ERR_MASK (1 << 10) +#define I5100_FERR_NF_MEM_M6ERR_MASK (1 << 6) +#define I5100_FERR_NF_MEM_M5ERR_MASK (1 << 5) +#define I5100_FERR_NF_MEM_M4ERR_MASK (1 << 4) +#define I5100_FERR_NF_MEM_M1ERR_MASK (1 << 1) +#define I5100_FERR_NF_MEM_ANY_MASK \ + (I5100_FERR_NF_MEM_M16ERR_MASK | \ + I5100_FERR_NF_MEM_M15ERR_MASK | \ + I5100_FERR_NF_MEM_M14ERR_MASK | \ + I5100_FERR_NF_MEM_M12ERR_MASK | \ + I5100_FERR_NF_MEM_M11ERR_MASK | \ + I5100_FERR_NF_MEM_M10ERR_MASK | \ + I5100_FERR_NF_MEM_M6ERR_MASK | \ + I5100_FERR_NF_MEM_M5ERR_MASK | \ + I5100_FERR_NF_MEM_M4ERR_MASK | \ + I5100_FERR_NF_MEM_M1ERR_MASK) +#define I5100_NERR_NF_MEM 0xa4 /* MC Next Non-Fatal Errors */ +#define I5100_EMASK_MEM 0xa8 /* MC Error Mask Register */ +#define I5100_MEM0EINJMSK0 0x200 /* Injection Mask0 Register Channel 0 */ +#define I5100_MEM1EINJMSK0 0x208 /* Injection Mask0 Register Channel 1 */ +#define I5100_MEMXEINJMSK0_EINJEN (1 << 27) +#define I5100_MEM0EINJMSK1 0x204 /* Injection Mask1 Register Channel 0 */ +#define I5100_MEM1EINJMSK1 0x206 /* Injection Mask1 Register Channel 1 */ + +/* Device 19, Function 0 */ +#define I5100_DINJ0 0x9a + +/* device 21 and 22, func 0 */ +#define I5100_MTR_0 0x154 /* Memory Technology Registers 0-3 */ +#define I5100_DMIR 0x15c /* DIMM Interleave Range */ +#define I5100_VALIDLOG 0x18c /* Valid Log Markers */ +#define I5100_NRECMEMA 0x190 /* Non-Recoverable Memory Error Log Reg A */ +#define I5100_NRECMEMB 0x194 /* Non-Recoverable Memory Error Log Reg B */ +#define I5100_REDMEMA 0x198 /* Recoverable Memory Data Error Log Reg A */ +#define I5100_REDMEMB 0x19c /* Recoverable Memory Data Error Log Reg B */ +#define I5100_RECMEMA 0x1a0 /* Recoverable Memory Error Log Reg A */ +#define I5100_RECMEMB 0x1a4 /* Recoverable Memory Error Log Reg B */ +#define I5100_MTR_4 0x1b0 /* Memory Technology Registers 4,5 */ + +/* bit field accessors */ + +static inline u32 i5100_mc_scrben(u32 mc) +{ + return mc >> 7 & 1; +} + +static inline u32 i5100_mc_errdeten(u32 mc) +{ + return mc >> 5 & 1; +} + +static inline u32 i5100_mc_scrbdone(u32 mc) +{ + return mc >> 4 & 1; +} + +static inline u16 i5100_spddata_rdo(u16 a) +{ + return a >> 15 & 1; +} + +static inline u16 i5100_spddata_sbe(u16 a) +{ + return a >> 13 & 1; +} + +static inline u16 i5100_spddata_busy(u16 a) +{ + return a >> 12 & 1; +} + +static inline u16 i5100_spddata_data(u16 a) +{ + return a & ((1 << 8) - 1); +} + +static inline u32 i5100_spdcmd_create(u32 dti, u32 ckovrd, u32 sa, u32 ba, + u32 data, u32 cmd) +{ + return ((dti & ((1 << 4) - 1)) << 28) | + ((ckovrd & 1) << 27) | + ((sa & ((1 << 3) - 1)) << 24) | + ((ba & ((1 << 8) - 1)) << 16) | + ((data & ((1 << 8) - 1)) << 8) | + (cmd & 1); +} + +static inline u16 i5100_tolm_tolm(u16 a) +{ + return a >> 12 & ((1 << 4) - 1); +} + +static inline u16 i5100_mir_limit(u16 a) +{ + return a >> 4 & ((1 << 12) - 1); +} + +static inline u16 i5100_mir_way1(u16 a) +{ + return a >> 1 & 1; +} + +static inline u16 i5100_mir_way0(u16 a) +{ + return a & 1; +} + +static inline u32 i5100_ferr_nf_mem_chan_indx(u32 a) +{ + return a >> 28 & 1; +} + +static inline u32 i5100_ferr_nf_mem_any(u32 a) +{ + return a & I5100_FERR_NF_MEM_ANY_MASK; +} + +static inline u32 i5100_nerr_nf_mem_any(u32 a) +{ + return i5100_ferr_nf_mem_any(a); +} + +static inline u32 i5100_dmir_limit(u32 a) +{ + return a >> 16 & ((1 << 11) - 1); +} + +static inline u32 i5100_dmir_rank(u32 a, u32 i) +{ + return a >> (4 * i) & ((1 << 2) - 1); +} + +static inline u16 i5100_mtr_present(u16 a) +{ + return a >> 10 & 1; +} + +static inline u16 i5100_mtr_ethrottle(u16 a) +{ + return a >> 9 & 1; +} + +static inline u16 i5100_mtr_width(u16 a) +{ + return a >> 8 & 1; +} + +static inline u16 i5100_mtr_numbank(u16 a) +{ + return a >> 6 & 1; +} + +static inline u16 i5100_mtr_numrow(u16 a) +{ + return a >> 2 & ((1 << 2) - 1); +} + +static inline u16 i5100_mtr_numcol(u16 a) +{ + return a & ((1 << 2) - 1); +} + + +static inline u32 i5100_validlog_redmemvalid(u32 a) +{ + return a >> 2 & 1; +} + +static inline u32 i5100_validlog_recmemvalid(u32 a) +{ + return a >> 1 & 1; +} + +static inline u32 i5100_validlog_nrecmemvalid(u32 a) +{ + return a & 1; +} + +static inline u32 i5100_nrecmema_merr(u32 a) +{ + return a >> 15 & ((1 << 5) - 1); +} + +static inline u32 i5100_nrecmema_bank(u32 a) +{ + return a >> 12 & ((1 << 3) - 1); +} + +static inline u32 i5100_nrecmema_rank(u32 a) +{ + return a >> 8 & ((1 << 3) - 1); +} + +static inline u32 i5100_nrecmema_dm_buf_id(u32 a) +{ + return a & ((1 << 8) - 1); +} + +static inline u32 i5100_nrecmemb_cas(u32 a) +{ + return a >> 16 & ((1 << 13) - 1); +} + +static inline u32 i5100_nrecmemb_ras(u32 a) +{ + return a & ((1 << 16) - 1); +} + +static inline u32 i5100_recmema_merr(u32 a) +{ + return i5100_nrecmema_merr(a); +} + +static inline u32 i5100_recmema_bank(u32 a) +{ + return i5100_nrecmema_bank(a); +} + +static inline u32 i5100_recmema_rank(u32 a) +{ + return i5100_nrecmema_rank(a); +} + +static inline u32 i5100_recmemb_cas(u32 a) +{ + return i5100_nrecmemb_cas(a); +} + +static inline u32 i5100_recmemb_ras(u32 a) +{ + return i5100_nrecmemb_ras(a); +} + +/* some generic limits */ +#define I5100_MAX_RANKS_PER_CHAN 6 +#define I5100_CHANNELS 2 +#define I5100_MAX_RANKS_PER_DIMM 4 +#define I5100_DIMM_ADDR_LINES (6 - 3) /* 64 bits / 8 bits per byte */ +#define I5100_MAX_DIMM_SLOTS_PER_CHAN 4 +#define I5100_MAX_RANK_INTERLEAVE 4 +#define I5100_MAX_DMIRS 5 +#define I5100_SCRUB_REFRESH_RATE (5 * 60 * HZ) + +struct i5100_priv { + /* ranks on each dimm -- 0 maps to not present -- obtained via SPD */ + int dimm_numrank[I5100_CHANNELS][I5100_MAX_DIMM_SLOTS_PER_CHAN]; + + /* + * mainboard chip select map -- maps i5100 chip selects to + * DIMM slot chip selects. In the case of only 4 ranks per + * channel, the mapping is fairly obvious but not unique. + * we map -1 -> NC and assume both channels use the same + * map... + * + */ + int dimm_csmap[I5100_MAX_DIMM_SLOTS_PER_CHAN][I5100_MAX_RANKS_PER_DIMM]; + + /* memory interleave range */ + struct { + u64 limit; + unsigned way[2]; + } mir[I5100_CHANNELS]; + + /* adjusted memory interleave range register */ + unsigned amir[I5100_CHANNELS]; + + /* dimm interleave range */ + struct { + unsigned rank[I5100_MAX_RANK_INTERLEAVE]; + u64 limit; + } dmir[I5100_CHANNELS][I5100_MAX_DMIRS]; + + /* memory technology registers... */ + struct { + unsigned present; /* 0 or 1 */ + unsigned ethrottle; /* 0 or 1 */ + unsigned width; /* 4 or 8 bits */ + unsigned numbank; /* 2 or 3 lines */ + unsigned numrow; /* 13 .. 16 lines */ + unsigned numcol; /* 11 .. 12 lines */ + } mtr[I5100_CHANNELS][I5100_MAX_RANKS_PER_CHAN]; + + u64 tolm; /* top of low memory in bytes */ + unsigned ranksperchan; /* number of ranks per channel */ + + struct pci_dev *mc; /* device 16 func 1 */ + struct pci_dev *einj; /* device 19 func 0 */ + struct pci_dev *ch0mm; /* device 21 func 0 */ + struct pci_dev *ch1mm; /* device 22 func 0 */ + + struct delayed_work i5100_scrubbing; + int scrub_enable; + + /* Error injection */ + u8 inject_channel; + u8 inject_hlinesel; + u8 inject_deviceptr1; + u8 inject_deviceptr2; + u16 inject_eccmask1; + u16 inject_eccmask2; + + struct dentry *debugfs; +}; + +static struct dentry *i5100_debugfs; + +/* map a rank/chan to a slot number on the mainboard */ +static int i5100_rank_to_slot(const struct mem_ctl_info *mci, + int chan, int rank) +{ + const struct i5100_priv *priv = mci->pvt_info; + int i; + + for (i = 0; i < I5100_MAX_DIMM_SLOTS_PER_CHAN; i++) { + int j; + const int numrank = priv->dimm_numrank[chan][i]; + + for (j = 0; j < numrank; j++) + if (priv->dimm_csmap[i][j] == rank) + return i * 2 + chan; + } + + return -1; +} + +static const char *i5100_err_msg(unsigned err) +{ + static const char *merrs[] = { + "unknown", /* 0 */ + "uncorrectable data ECC on replay", /* 1 */ + "unknown", /* 2 */ + "unknown", /* 3 */ + "aliased uncorrectable demand data ECC", /* 4 */ + "aliased uncorrectable spare-copy data ECC", /* 5 */ + "aliased uncorrectable patrol data ECC", /* 6 */ + "unknown", /* 7 */ + "unknown", /* 8 */ + "unknown", /* 9 */ + "non-aliased uncorrectable demand data ECC", /* 10 */ + "non-aliased uncorrectable spare-copy data ECC", /* 11 */ + "non-aliased uncorrectable patrol data ECC", /* 12 */ + "unknown", /* 13 */ + "correctable demand data ECC", /* 14 */ + "correctable spare-copy data ECC", /* 15 */ + "correctable patrol data ECC", /* 16 */ + "unknown", /* 17 */ + "SPD protocol error", /* 18 */ + "unknown", /* 19 */ + "spare copy initiated", /* 20 */ + "spare copy completed", /* 21 */ + }; + unsigned i; + + for (i = 0; i < ARRAY_SIZE(merrs); i++) + if (1 << i & err) + return merrs[i]; + + return "none"; +} + +/* convert csrow index into a rank (per channel -- 0..5) */ +static unsigned int i5100_csrow_to_rank(const struct mem_ctl_info *mci, + unsigned int csrow) +{ + const struct i5100_priv *priv = mci->pvt_info; + + return csrow % priv->ranksperchan; +} + +/* convert csrow index into a channel (0..1) */ +static unsigned int i5100_csrow_to_chan(const struct mem_ctl_info *mci, + unsigned int csrow) +{ + const struct i5100_priv *priv = mci->pvt_info; + + return csrow / priv->ranksperchan; +} + +static void i5100_handle_ce(struct mem_ctl_info *mci, + int chan, + unsigned bank, + unsigned rank, + unsigned long syndrome, + unsigned cas, + unsigned ras, + const char *msg) +{ + char detail[80]; + + /* Form out message */ + snprintf(detail, sizeof(detail), + "bank %u, cas %u, ras %u\n", + bank, cas, ras); + + edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1, + 0, 0, syndrome, + chan, rank, -1, + msg, detail); +} + +static void i5100_handle_ue(struct mem_ctl_info *mci, + int chan, + unsigned bank, + unsigned rank, + unsigned long syndrome, + unsigned cas, + unsigned ras, + const char *msg) +{ + char detail[80]; + + /* Form out message */ + snprintf(detail, sizeof(detail), + "bank %u, cas %u, ras %u\n", + bank, cas, ras); + + edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1, + 0, 0, syndrome, + chan, rank, -1, + msg, detail); +} + +static void i5100_read_log(struct mem_ctl_info *mci, int chan, + u32 ferr, u32 nerr) +{ + struct i5100_priv *priv = mci->pvt_info; + struct pci_dev *pdev = (chan) ? priv->ch1mm : priv->ch0mm; + u32 dw; + u32 dw2; + unsigned syndrome = 0; + unsigned merr; + unsigned bank; + unsigned rank; + unsigned cas; + unsigned ras; + + pci_read_config_dword(pdev, I5100_VALIDLOG, &dw); + + if (i5100_validlog_redmemvalid(dw)) { + pci_read_config_dword(pdev, I5100_REDMEMA, &dw2); + syndrome = dw2; + pci_read_config_dword(pdev, I5100_REDMEMB, &dw2); + } + + if (i5100_validlog_recmemvalid(dw)) { + const char *msg; + + pci_read_config_dword(pdev, I5100_RECMEMA, &dw2); + merr = i5100_recmema_merr(dw2); + bank = i5100_recmema_bank(dw2); + rank = i5100_recmema_rank(dw2); + + pci_read_config_dword(pdev, I5100_RECMEMB, &dw2); + cas = i5100_recmemb_cas(dw2); + ras = i5100_recmemb_ras(dw2); + + /* FIXME: not really sure if this is what merr is... + */ + if (!merr) + msg = i5100_err_msg(ferr); + else + msg = i5100_err_msg(nerr); + + i5100_handle_ce(mci, chan, bank, rank, syndrome, cas, ras, msg); + } + + if (i5100_validlog_nrecmemvalid(dw)) { + const char *msg; + + pci_read_config_dword(pdev, I5100_NRECMEMA, &dw2); + merr = i5100_nrecmema_merr(dw2); + bank = i5100_nrecmema_bank(dw2); + rank = i5100_nrecmema_rank(dw2); + + pci_read_config_dword(pdev, I5100_NRECMEMB, &dw2); + cas = i5100_nrecmemb_cas(dw2); + ras = i5100_nrecmemb_ras(dw2); + + /* FIXME: not really sure if this is what merr is... + */ + if (!merr) + msg = i5100_err_msg(ferr); + else + msg = i5100_err_msg(nerr); + + i5100_handle_ue(mci, chan, bank, rank, syndrome, cas, ras, msg); + } + + pci_write_config_dword(pdev, I5100_VALIDLOG, dw); +} + +static void i5100_check_error(struct mem_ctl_info *mci) +{ + struct i5100_priv *priv = mci->pvt_info; + u32 dw, dw2; + + pci_read_config_dword(priv->mc, I5100_FERR_NF_MEM, &dw); + if (i5100_ferr_nf_mem_any(dw)) { + + pci_read_config_dword(priv->mc, I5100_NERR_NF_MEM, &dw2); + + i5100_read_log(mci, i5100_ferr_nf_mem_chan_indx(dw), + i5100_ferr_nf_mem_any(dw), + i5100_nerr_nf_mem_any(dw2)); + + pci_write_config_dword(priv->mc, I5100_NERR_NF_MEM, dw2); + } + pci_write_config_dword(priv->mc, I5100_FERR_NF_MEM, dw); +} + +/* The i5100 chipset will scrub the entire memory once, then + * set a done bit. Continuous scrubbing is achieved by enqueing + * delayed work to a workqueue, checking every few minutes if + * the scrubbing has completed and if so reinitiating it. + */ + +static void i5100_refresh_scrubbing(struct work_struct *work) +{ + struct delayed_work *i5100_scrubbing = to_delayed_work(work); + struct i5100_priv *priv = container_of(i5100_scrubbing, + struct i5100_priv, + i5100_scrubbing); + u32 dw; + + pci_read_config_dword(priv->mc, I5100_MC, &dw); + + if (priv->scrub_enable) { + + pci_read_config_dword(priv->mc, I5100_MC, &dw); + + if (i5100_mc_scrbdone(dw)) { + dw |= I5100_MC_SCRBEN_MASK; + pci_write_config_dword(priv->mc, I5100_MC, dw); + pci_read_config_dword(priv->mc, I5100_MC, &dw); + } + + schedule_delayed_work(&(priv->i5100_scrubbing), + I5100_SCRUB_REFRESH_RATE); + } +} +/* + * The bandwidth is based on experimentation, feel free to refine it. + */ +static int i5100_set_scrub_rate(struct mem_ctl_info *mci, u32 bandwidth) +{ + struct i5100_priv *priv = mci->pvt_info; + u32 dw; + + pci_read_config_dword(priv->mc, I5100_MC, &dw); + if (bandwidth) { + priv->scrub_enable = 1; + dw |= I5100_MC_SCRBEN_MASK; + schedule_delayed_work(&(priv->i5100_scrubbing), + I5100_SCRUB_REFRESH_RATE); + } else { + priv->scrub_enable = 0; + dw &= ~I5100_MC_SCRBEN_MASK; + cancel_delayed_work(&(priv->i5100_scrubbing)); + } + pci_write_config_dword(priv->mc, I5100_MC, dw); + + pci_read_config_dword(priv->mc, I5100_MC, &dw); + + bandwidth = 5900000 * i5100_mc_scrben(dw); + + return bandwidth; +} + +static int i5100_get_scrub_rate(struct mem_ctl_info *mci) +{ + struct i5100_priv *priv = mci->pvt_info; + u32 dw; + + pci_read_config_dword(priv->mc, I5100_MC, &dw); + + return 5900000 * i5100_mc_scrben(dw); +} + +static struct pci_dev *pci_get_device_func(unsigned vendor, + unsigned device, + unsigned func) +{ + struct pci_dev *ret = NULL; + + while (1) { + ret = pci_get_device(vendor, device, ret); + + if (!ret) + break; + + if (PCI_FUNC(ret->devfn) == func) + break; + } + + return ret; +} + +static unsigned long i5100_npages(struct mem_ctl_info *mci, unsigned int csrow) +{ + struct i5100_priv *priv = mci->pvt_info; + const unsigned int chan_rank = i5100_csrow_to_rank(mci, csrow); + const unsigned int chan = i5100_csrow_to_chan(mci, csrow); + unsigned addr_lines; + + /* dimm present? */ + if (!priv->mtr[chan][chan_rank].present) + return 0ULL; + + addr_lines = + I5100_DIMM_ADDR_LINES + + priv->mtr[chan][chan_rank].numcol + + priv->mtr[chan][chan_rank].numrow + + priv->mtr[chan][chan_rank].numbank; + + return (unsigned long) + ((unsigned long long) (1ULL << addr_lines) / PAGE_SIZE); +} + +static void i5100_init_mtr(struct mem_ctl_info *mci) +{ + struct i5100_priv *priv = mci->pvt_info; + struct pci_dev *mms[2] = { priv->ch0mm, priv->ch1mm }; + int i; + + for (i = 0; i < I5100_CHANNELS; i++) { + int j; + struct pci_dev *pdev = mms[i]; + + for (j = 0; j < I5100_MAX_RANKS_PER_CHAN; j++) { + const unsigned addr = + (j < 4) ? I5100_MTR_0 + j * 2 : + I5100_MTR_4 + (j - 4) * 2; + u16 w; + + pci_read_config_word(pdev, addr, &w); + + priv->mtr[i][j].present = i5100_mtr_present(w); + priv->mtr[i][j].ethrottle = i5100_mtr_ethrottle(w); + priv->mtr[i][j].width = 4 + 4 * i5100_mtr_width(w); + priv->mtr[i][j].numbank = 2 + i5100_mtr_numbank(w); + priv->mtr[i][j].numrow = 13 + i5100_mtr_numrow(w); + priv->mtr[i][j].numcol = 10 + i5100_mtr_numcol(w); + } + } +} + +/* + * FIXME: make this into a real i2c adapter (so that dimm-decode + * will work)? + */ +static int i5100_read_spd_byte(const struct mem_ctl_info *mci, + u8 ch, u8 slot, u8 addr, u8 *byte) +{ + struct i5100_priv *priv = mci->pvt_info; + u16 w; + + pci_read_config_word(priv->mc, I5100_SPDDATA, &w); + if (i5100_spddata_busy(w)) + return -1; + + pci_write_config_dword(priv->mc, I5100_SPDCMD, + i5100_spdcmd_create(0xa, 1, ch * 4 + slot, addr, + 0, 0)); + + /* wait up to 100ms */ + udelay(100); + while (1) { + pci_read_config_word(priv->mc, I5100_SPDDATA, &w); + if (!i5100_spddata_busy(w)) + break; + udelay(100); + } + + if (!i5100_spddata_rdo(w) || i5100_spddata_sbe(w)) + return -1; + + *byte = i5100_spddata_data(w); + + return 0; +} + +/* + * fill dimm chip select map + * + * FIXME: + * o not the only way to may chip selects to dimm slots + * o investigate if there is some way to obtain this map from the bios + */ +static void i5100_init_dimm_csmap(struct mem_ctl_info *mci) +{ + struct i5100_priv *priv = mci->pvt_info; + int i; + + for (i = 0; i < I5100_MAX_DIMM_SLOTS_PER_CHAN; i++) { + int j; + + for (j = 0; j < I5100_MAX_RANKS_PER_DIMM; j++) + priv->dimm_csmap[i][j] = -1; /* default NC */ + } + + /* only 2 chip selects per slot... */ + if (priv->ranksperchan == 4) { + priv->dimm_csmap[0][0] = 0; + priv->dimm_csmap[0][1] = 3; + priv->dimm_csmap[1][0] = 1; + priv->dimm_csmap[1][1] = 2; + priv->dimm_csmap[2][0] = 2; + priv->dimm_csmap[3][0] = 3; + } else { + priv->dimm_csmap[0][0] = 0; + priv->dimm_csmap[0][1] = 1; + priv->dimm_csmap[1][0] = 2; + priv->dimm_csmap[1][1] = 3; + priv->dimm_csmap[2][0] = 4; + priv->dimm_csmap[2][1] = 5; + } +} + +static void i5100_init_dimm_layout(struct pci_dev *pdev, + struct mem_ctl_info *mci) +{ + struct i5100_priv *priv = mci->pvt_info; + int i; + + for (i = 0; i < I5100_CHANNELS; i++) { + int j; + + for (j = 0; j < I5100_MAX_DIMM_SLOTS_PER_CHAN; j++) { + u8 rank; + + if (i5100_read_spd_byte(mci, i, j, 5, &rank) < 0) + priv->dimm_numrank[i][j] = 0; + else + priv->dimm_numrank[i][j] = (rank & 3) + 1; + } + } + + i5100_init_dimm_csmap(mci); +} + +static void i5100_init_interleaving(struct pci_dev *pdev, + struct mem_ctl_info *mci) +{ + u16 w; + u32 dw; + struct i5100_priv *priv = mci->pvt_info; + struct pci_dev *mms[2] = { priv->ch0mm, priv->ch1mm }; + int i; + + pci_read_config_word(pdev, I5100_TOLM, &w); + priv->tolm = (u64) i5100_tolm_tolm(w) * 256 * 1024 * 1024; + + pci_read_config_word(pdev, I5100_MIR0, &w); + priv->mir[0].limit = (u64) i5100_mir_limit(w) << 28; + priv->mir[0].way[1] = i5100_mir_way1(w); + priv->mir[0].way[0] = i5100_mir_way0(w); + + pci_read_config_word(pdev, I5100_MIR1, &w); + priv->mir[1].limit = (u64) i5100_mir_limit(w) << 28; + priv->mir[1].way[1] = i5100_mir_way1(w); + priv->mir[1].way[0] = i5100_mir_way0(w); + + pci_read_config_word(pdev, I5100_AMIR_0, &w); + priv->amir[0] = w; + pci_read_config_word(pdev, I5100_AMIR_1, &w); + priv->amir[1] = w; + + for (i = 0; i < I5100_CHANNELS; i++) { + int j; + + for (j = 0; j < 5; j++) { + int k; + + pci_read_config_dword(mms[i], I5100_DMIR + j * 4, &dw); + + priv->dmir[i][j].limit = + (u64) i5100_dmir_limit(dw) << 28; + for (k = 0; k < I5100_MAX_RANKS_PER_DIMM; k++) + priv->dmir[i][j].rank[k] = + i5100_dmir_rank(dw, k); + } + } + + i5100_init_mtr(mci); +} + +static void i5100_init_csrows(struct mem_ctl_info *mci) +{ + struct i5100_priv *priv = mci->pvt_info; + struct dimm_info *dimm; + + mci_for_each_dimm(mci, dimm) { + const unsigned long npages = i5100_npages(mci, dimm->idx); + const unsigned int chan = i5100_csrow_to_chan(mci, dimm->idx); + const unsigned int rank = i5100_csrow_to_rank(mci, dimm->idx); + + if (!npages) + continue; + + dimm->nr_pages = npages; + dimm->grain = 32; + dimm->dtype = (priv->mtr[chan][rank].width == 4) ? + DEV_X4 : DEV_X8; + dimm->mtype = MEM_RDDR2; + dimm->edac_mode = EDAC_SECDED; + snprintf(dimm->label, sizeof(dimm->label), "DIMM%u", + i5100_rank_to_slot(mci, chan, rank)); + + edac_dbg(2, "dimm channel %d, rank %d, size %ld\n", + chan, rank, (long)PAGES_TO_MiB(npages)); + } +} + +/**************************************************************************** + * Error injection routines + ****************************************************************************/ + +static void i5100_do_inject(struct mem_ctl_info *mci) +{ + struct i5100_priv *priv = mci->pvt_info; + u32 mask0; + u16 mask1; + + /* MEM[1:0]EINJMSK0 + * 31 - ADDRMATCHEN + * 29:28 - HLINESEL + * 00 Reserved + * 01 Lower half of cache line + * 10 Upper half of cache line + * 11 Both upper and lower parts of cache line + * 27 - EINJEN + * 25:19 - XORMASK1 for deviceptr1 + * 9:5 - SEC2RAM for deviceptr2 + * 4:0 - FIR2RAM for deviceptr1 + */ + mask0 = ((priv->inject_hlinesel & 0x3) << 28) | + I5100_MEMXEINJMSK0_EINJEN | + ((priv->inject_eccmask1 & 0xffff) << 10) | + ((priv->inject_deviceptr2 & 0x1f) << 5) | + (priv->inject_deviceptr1 & 0x1f); + + /* MEM[1:0]EINJMSK1 + * 15:0 - XORMASK2 for deviceptr2 + */ + mask1 = priv->inject_eccmask2; + + if (priv->inject_channel == 0) { + pci_write_config_dword(priv->mc, I5100_MEM0EINJMSK0, mask0); + pci_write_config_word(priv->mc, I5100_MEM0EINJMSK1, mask1); + } else { + pci_write_config_dword(priv->mc, I5100_MEM1EINJMSK0, mask0); + pci_write_config_word(priv->mc, I5100_MEM1EINJMSK1, mask1); + } + + /* Error Injection Response Function + * Intel 5100 Memory Controller Hub Chipset (318378) datasheet + * hints about this register but carry no data about them. All + * data regarding device 19 is based on experimentation and the + * Intel 7300 Chipset Memory Controller Hub (318082) datasheet + * which appears to be accurate for the i5100 in this area. + * + * The injection code don't work without setting this register. + * The register needs to be flipped off then on else the hardware + * will only preform the first injection. + * + * Stop condition bits 7:4 + * 1010 - Stop after one injection + * 1011 - Never stop injecting faults + * + * Start condition bits 3:0 + * 1010 - Never start + * 1011 - Start immediately + */ + pci_write_config_byte(priv->einj, I5100_DINJ0, 0xaa); + pci_write_config_byte(priv->einj, I5100_DINJ0, 0xab); +} + +#define to_mci(k) container_of(k, struct mem_ctl_info, dev) +static ssize_t inject_enable_write(struct file *file, const char __user *data, + size_t count, loff_t *ppos) +{ + struct device *dev = file->private_data; + struct mem_ctl_info *mci = to_mci(dev); + + i5100_do_inject(mci); + + return count; +} + +static const struct file_operations i5100_inject_enable_fops = { + .open = simple_open, + .write = inject_enable_write, + .llseek = generic_file_llseek, +}; + +static int i5100_setup_debugfs(struct mem_ctl_info *mci) +{ + struct i5100_priv *priv = mci->pvt_info; + + if (!i5100_debugfs) + return -ENODEV; + + priv->debugfs = edac_debugfs_create_dir_at(mci->bus->name, i5100_debugfs); + + if (!priv->debugfs) + return -ENOMEM; + + edac_debugfs_create_x8("inject_channel", S_IRUGO | S_IWUSR, priv->debugfs, + &priv->inject_channel); + edac_debugfs_create_x8("inject_hlinesel", S_IRUGO | S_IWUSR, priv->debugfs, + &priv->inject_hlinesel); + edac_debugfs_create_x8("inject_deviceptr1", S_IRUGO | S_IWUSR, priv->debugfs, + &priv->inject_deviceptr1); + edac_debugfs_create_x8("inject_deviceptr2", S_IRUGO | S_IWUSR, priv->debugfs, + &priv->inject_deviceptr2); + edac_debugfs_create_x16("inject_eccmask1", S_IRUGO | S_IWUSR, priv->debugfs, + &priv->inject_eccmask1); + edac_debugfs_create_x16("inject_eccmask2", S_IRUGO | S_IWUSR, priv->debugfs, + &priv->inject_eccmask2); + edac_debugfs_create_file("inject_enable", S_IWUSR, priv->debugfs, + &mci->dev, &i5100_inject_enable_fops); + + return 0; + +} + +static int i5100_init_one(struct pci_dev *pdev, const struct pci_device_id *id) +{ + int rc; + struct mem_ctl_info *mci; + struct edac_mc_layer layers[2]; + struct i5100_priv *priv; + struct pci_dev *ch0mm, *ch1mm, *einj; + int ret = 0; + u32 dw; + int ranksperch; + + if (PCI_FUNC(pdev->devfn) != 1) + return -ENODEV; + + rc = pci_enable_device(pdev); + if (rc < 0) { + ret = rc; + goto bail; + } + + /* ECC enabled? */ + pci_read_config_dword(pdev, I5100_MC, &dw); + if (!i5100_mc_errdeten(dw)) { + printk(KERN_INFO "i5100_edac: ECC not enabled.\n"); + ret = -ENODEV; + goto bail_pdev; + } + + /* figure out how many ranks, from strapped state of 48GB_Mode input */ + pci_read_config_dword(pdev, I5100_MS, &dw); + ranksperch = !!(dw & (1 << 8)) * 2 + 4; + + /* enable error reporting... */ + pci_read_config_dword(pdev, I5100_EMASK_MEM, &dw); + dw &= ~I5100_FERR_NF_MEM_ANY_MASK; + pci_write_config_dword(pdev, I5100_EMASK_MEM, dw); + + /* device 21, func 0, Channel 0 Memory Map, Error Flag/Mask, etc... */ + ch0mm = pci_get_device_func(PCI_VENDOR_ID_INTEL, + PCI_DEVICE_ID_INTEL_5100_21, 0); + if (!ch0mm) { + ret = -ENODEV; + goto bail_pdev; + } + + rc = pci_enable_device(ch0mm); + if (rc < 0) { + ret = rc; + goto bail_ch0; + } + + /* device 22, func 0, Channel 1 Memory Map, Error Flag/Mask, etc... */ + ch1mm = pci_get_device_func(PCI_VENDOR_ID_INTEL, + PCI_DEVICE_ID_INTEL_5100_22, 0); + if (!ch1mm) { + ret = -ENODEV; + goto bail_disable_ch0; + } + + rc = pci_enable_device(ch1mm); + if (rc < 0) { + ret = rc; + goto bail_ch1; + } + + layers[0].type = EDAC_MC_LAYER_CHANNEL; + layers[0].size = 2; + layers[0].is_virt_csrow = false; + layers[1].type = EDAC_MC_LAYER_SLOT; + layers[1].size = ranksperch; + layers[1].is_virt_csrow = true; + mci = edac_mc_alloc(0, ARRAY_SIZE(layers), layers, + sizeof(*priv)); + if (!mci) { + ret = -ENOMEM; + goto bail_disable_ch1; + } + + + /* device 19, func 0, Error injection */ + einj = pci_get_device_func(PCI_VENDOR_ID_INTEL, + PCI_DEVICE_ID_INTEL_5100_19, 0); + if (!einj) { + ret = -ENODEV; + goto bail_mc_free; + } + + rc = pci_enable_device(einj); + if (rc < 0) { + ret = rc; + goto bail_einj; + } + + mci->pdev = &pdev->dev; + + priv = mci->pvt_info; + priv->ranksperchan = ranksperch; + priv->mc = pdev; + priv->ch0mm = ch0mm; + priv->ch1mm = ch1mm; + priv->einj = einj; + + INIT_DELAYED_WORK(&(priv->i5100_scrubbing), i5100_refresh_scrubbing); + + /* If scrubbing was already enabled by the bios, start maintaining it */ + pci_read_config_dword(pdev, I5100_MC, &dw); + if (i5100_mc_scrben(dw)) { + priv->scrub_enable = 1; + schedule_delayed_work(&(priv->i5100_scrubbing), + I5100_SCRUB_REFRESH_RATE); + } + + i5100_init_dimm_layout(pdev, mci); + i5100_init_interleaving(pdev, mci); + + mci->mtype_cap = MEM_FLAG_FB_DDR2; + mci->edac_ctl_cap = EDAC_FLAG_SECDED; + mci->edac_cap = EDAC_FLAG_SECDED; + mci->mod_name = "i5100_edac.c"; + mci->ctl_name = "i5100"; + mci->dev_name = pci_name(pdev); + mci->ctl_page_to_phys = NULL; + + mci->edac_check = i5100_check_error; + mci->set_sdram_scrub_rate = i5100_set_scrub_rate; + mci->get_sdram_scrub_rate = i5100_get_scrub_rate; + + priv->inject_channel = 0; + priv->inject_hlinesel = 0; + priv->inject_deviceptr1 = 0; + priv->inject_deviceptr2 = 0; + priv->inject_eccmask1 = 0; + priv->inject_eccmask2 = 0; + + i5100_init_csrows(mci); + + /* this strange construction seems to be in every driver, dunno why */ + switch (edac_op_state) { + case EDAC_OPSTATE_POLL: + case EDAC_OPSTATE_NMI: + break; + default: + edac_op_state = EDAC_OPSTATE_POLL; + break; + } + + if (edac_mc_add_mc(mci)) { + ret = -ENODEV; + goto bail_scrub; + } + + i5100_setup_debugfs(mci); + + return ret; + +bail_scrub: + priv->scrub_enable = 0; + cancel_delayed_work_sync(&(priv->i5100_scrubbing)); + pci_disable_device(einj); + +bail_einj: + pci_dev_put(einj); + +bail_mc_free: + edac_mc_free(mci); + +bail_disable_ch1: + pci_disable_device(ch1mm); + +bail_ch1: + pci_dev_put(ch1mm); + +bail_disable_ch0: + pci_disable_device(ch0mm); + +bail_ch0: + pci_dev_put(ch0mm); + +bail_pdev: + pci_disable_device(pdev); + +bail: + return ret; +} + +static void i5100_remove_one(struct pci_dev *pdev) +{ + struct mem_ctl_info *mci; + struct i5100_priv *priv; + + mci = edac_mc_del_mc(&pdev->dev); + + if (!mci) + return; + + priv = mci->pvt_info; + + edac_debugfs_remove_recursive(priv->debugfs); + + priv->scrub_enable = 0; + cancel_delayed_work_sync(&(priv->i5100_scrubbing)); + + pci_disable_device(pdev); + pci_disable_device(priv->ch0mm); + pci_disable_device(priv->ch1mm); + pci_disable_device(priv->einj); + pci_dev_put(priv->ch0mm); + pci_dev_put(priv->ch1mm); + pci_dev_put(priv->einj); + + edac_mc_free(mci); +} + +static const struct pci_device_id i5100_pci_tbl[] = { + /* Device 16, Function 0, Channel 0 Memory Map, Error Flag/Mask, ... */ + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_5100_16) }, + { 0, } +}; +MODULE_DEVICE_TABLE(pci, i5100_pci_tbl); + +static struct pci_driver i5100_driver = { + .name = KBUILD_BASENAME, + .probe = i5100_init_one, + .remove = i5100_remove_one, + .id_table = i5100_pci_tbl, +}; + +static int __init i5100_init(void) +{ + int pci_rc; + + i5100_debugfs = edac_debugfs_create_dir_at("i5100_edac", NULL); + + pci_rc = pci_register_driver(&i5100_driver); + return (pci_rc < 0) ? pci_rc : 0; +} + +static void __exit i5100_exit(void) +{ + edac_debugfs_remove(i5100_debugfs); + + pci_unregister_driver(&i5100_driver); +} + +module_init(i5100_init); +module_exit(i5100_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR + ("Arthur Jones "); +MODULE_DESCRIPTION("MC Driver for Intel I5100 memory controllers"); -- cgit v1.2.3