276 lines
6.3 KiB
C
276 lines
6.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Driver for Intel(R) 10nm server memory controller.
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* Copyright (c) 2019, Intel Corporation.
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*
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*/
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#include <linux/kernel.h>
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#include <asm/cpu_device_id.h>
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#include <asm/intel-family.h>
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#include <asm/mce.h>
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#include "edac_module.h"
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#include "skx_common.h"
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#define I10NM_REVISION "v0.0.3"
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#define EDAC_MOD_STR "i10nm_edac"
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/* Debug macros */
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#define i10nm_printk(level, fmt, arg...) \
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edac_printk(level, "i10nm", fmt, ##arg)
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#define I10NM_GET_SCK_BAR(d, reg) \
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pci_read_config_dword((d)->uracu, 0xd0, &(reg))
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#define I10NM_GET_IMC_BAR(d, i, reg) \
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pci_read_config_dword((d)->uracu, 0xd8 + (i) * 4, &(reg))
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#define I10NM_GET_DIMMMTR(m, i, j) \
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(*(u32 *)((m)->mbase + 0x2080c + (i) * 0x4000 + (j) * 4))
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#define I10NM_GET_MCDDRTCFG(m, i, j) \
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(*(u32 *)((m)->mbase + 0x20970 + (i) * 0x4000 + (j) * 4))
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#define I10NM_GET_SCK_MMIO_BASE(reg) (GET_BITFIELD(reg, 0, 28) << 23)
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#define I10NM_GET_IMC_MMIO_OFFSET(reg) (GET_BITFIELD(reg, 0, 10) << 12)
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#define I10NM_GET_IMC_MMIO_SIZE(reg) ((GET_BITFIELD(reg, 13, 23) - \
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GET_BITFIELD(reg, 0, 10) + 1) << 12)
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static struct list_head *i10nm_edac_list;
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static struct pci_dev *pci_get_dev_wrapper(int dom, unsigned int bus,
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unsigned int dev, unsigned int fun)
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{
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struct pci_dev *pdev;
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pdev = pci_get_domain_bus_and_slot(dom, bus, PCI_DEVFN(dev, fun));
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if (!pdev) {
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edac_dbg(2, "No device %02x:%02x.%x\n",
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bus, dev, fun);
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return NULL;
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}
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if (unlikely(pci_enable_device(pdev) < 0)) {
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edac_dbg(2, "Failed to enable device %02x:%02x.%x\n",
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bus, dev, fun);
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return NULL;
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}
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pci_dev_get(pdev);
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return pdev;
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}
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static int i10nm_get_all_munits(void)
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{
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struct pci_dev *mdev;
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void __iomem *mbase;
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unsigned long size;
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struct skx_dev *d;
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int i, j = 0;
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u32 reg, off;
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u64 base;
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list_for_each_entry(d, i10nm_edac_list, list) {
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d->util_all = pci_get_dev_wrapper(d->seg, d->bus[1], 29, 1);
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if (!d->util_all)
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return -ENODEV;
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d->uracu = pci_get_dev_wrapper(d->seg, d->bus[0], 0, 1);
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if (!d->uracu)
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return -ENODEV;
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if (I10NM_GET_SCK_BAR(d, reg)) {
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i10nm_printk(KERN_ERR, "Failed to socket bar\n");
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return -ENODEV;
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}
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base = I10NM_GET_SCK_MMIO_BASE(reg);
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edac_dbg(2, "socket%d mmio base 0x%llx (reg 0x%x)\n",
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j++, base, reg);
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for (i = 0; i < I10NM_NUM_IMC; i++) {
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mdev = pci_get_dev_wrapper(d->seg, d->bus[0],
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12 + i, 0);
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if (i == 0 && !mdev) {
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i10nm_printk(KERN_ERR, "No IMC found\n");
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return -ENODEV;
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}
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if (!mdev)
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continue;
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d->imc[i].mdev = mdev;
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if (I10NM_GET_IMC_BAR(d, i, reg)) {
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i10nm_printk(KERN_ERR, "Failed to get mc bar\n");
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return -ENODEV;
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}
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off = I10NM_GET_IMC_MMIO_OFFSET(reg);
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size = I10NM_GET_IMC_MMIO_SIZE(reg);
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edac_dbg(2, "mc%d mmio base 0x%llx size 0x%lx (reg 0x%x)\n",
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i, base + off, size, reg);
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mbase = ioremap(base + off, size);
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if (!mbase) {
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i10nm_printk(KERN_ERR, "Failed to ioremap 0x%llx\n",
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base + off);
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return -ENODEV;
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}
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d->imc[i].mbase = mbase;
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}
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}
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return 0;
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}
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static const struct x86_cpu_id i10nm_cpuids[] = {
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{ X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_TREMONT_X, 0, 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(x86cpu, i10nm_cpuids);
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static bool i10nm_check_ecc(struct skx_imc *imc, int chan)
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{
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u32 mcmtr;
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mcmtr = *(u32 *)(imc->mbase + 0x20ef8 + chan * 0x4000);
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edac_dbg(1, "ch%d mcmtr reg %x\n", chan, mcmtr);
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return !!GET_BITFIELD(mcmtr, 2, 2);
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}
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static int i10nm_get_dimm_config(struct mem_ctl_info *mci)
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{
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struct skx_pvt *pvt = mci->pvt_info;
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struct skx_imc *imc = pvt->imc;
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struct dimm_info *dimm;
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u32 mtr, mcddrtcfg;
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int i, j, ndimms;
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for (i = 0; i < I10NM_NUM_CHANNELS; i++) {
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if (!imc->mbase)
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continue;
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ndimms = 0;
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for (j = 0; j < I10NM_NUM_DIMMS; j++) {
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dimm = EDAC_DIMM_PTR(mci->layers, mci->dimms,
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mci->n_layers, i, j, 0);
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mtr = I10NM_GET_DIMMMTR(imc, i, j);
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mcddrtcfg = I10NM_GET_MCDDRTCFG(imc, i, j);
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edac_dbg(1, "dimmmtr 0x%x mcddrtcfg 0x%x (mc%d ch%d dimm%d)\n",
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mtr, mcddrtcfg, imc->mc, i, j);
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if (IS_DIMM_PRESENT(mtr))
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ndimms += skx_get_dimm_info(mtr, 0, dimm,
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imc, i, j);
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else if (IS_NVDIMM_PRESENT(mcddrtcfg, j))
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ndimms += skx_get_nvdimm_info(dimm, imc, i, j,
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EDAC_MOD_STR);
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}
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if (ndimms && !i10nm_check_ecc(imc, 0)) {
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i10nm_printk(KERN_ERR, "ECC is disabled on imc %d\n",
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imc->mc);
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return -ENODEV;
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}
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}
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return 0;
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}
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static struct notifier_block i10nm_mce_dec = {
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.notifier_call = skx_mce_check_error,
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.priority = MCE_PRIO_EDAC,
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};
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static int __init i10nm_init(void)
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{
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u8 mc = 0, src_id = 0, node_id = 0;
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const struct x86_cpu_id *id;
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const char *owner;
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struct skx_dev *d;
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int rc, i, off[3] = {0xd0, 0xc8, 0xcc};
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u64 tolm, tohm;
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edac_dbg(2, "\n");
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owner = edac_get_owner();
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if (owner && strncmp(owner, EDAC_MOD_STR, sizeof(EDAC_MOD_STR)))
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return -EBUSY;
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id = x86_match_cpu(i10nm_cpuids);
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if (!id)
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return -ENODEV;
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rc = skx_get_hi_lo(0x09a2, off, &tolm, &tohm);
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if (rc)
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return rc;
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rc = skx_get_all_bus_mappings(0x3452, 0xcc, I10NM, &i10nm_edac_list);
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if (rc < 0)
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goto fail;
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if (rc == 0) {
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i10nm_printk(KERN_ERR, "No memory controllers found\n");
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return -ENODEV;
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}
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rc = i10nm_get_all_munits();
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if (rc < 0)
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goto fail;
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list_for_each_entry(d, i10nm_edac_list, list) {
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rc = skx_get_src_id(d, &src_id);
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if (rc < 0)
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goto fail;
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rc = skx_get_node_id(d, &node_id);
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if (rc < 0)
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goto fail;
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edac_dbg(2, "src_id = %d node_id = %d\n", src_id, node_id);
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for (i = 0; i < I10NM_NUM_IMC; i++) {
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if (!d->imc[i].mdev)
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continue;
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d->imc[i].mc = mc++;
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d->imc[i].lmc = i;
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d->imc[i].src_id = src_id;
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d->imc[i].node_id = node_id;
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rc = skx_register_mci(&d->imc[i], d->imc[i].mdev,
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"Intel_10nm Socket", EDAC_MOD_STR,
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i10nm_get_dimm_config);
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if (rc < 0)
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goto fail;
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}
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}
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rc = skx_adxl_get();
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if (rc)
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goto fail;
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opstate_init();
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mce_register_decode_chain(&i10nm_mce_dec);
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setup_skx_debug("i10nm_test");
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i10nm_printk(KERN_INFO, "%s\n", I10NM_REVISION);
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return 0;
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fail:
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skx_remove();
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return rc;
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}
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static void __exit i10nm_exit(void)
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{
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edac_dbg(2, "\n");
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teardown_skx_debug();
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mce_unregister_decode_chain(&i10nm_mce_dec);
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skx_adxl_put();
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skx_remove();
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}
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module_init(i10nm_init);
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module_exit(i10nm_exit);
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MODULE_LICENSE("GPL v2");
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MODULE_DESCRIPTION("MC Driver for Intel 10nm server processors");
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