511 lines
12 KiB
C
511 lines
12 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 <linux/io.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 "v0.0.5"
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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_SAD(d, offset, i, reg)\
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pci_read_config_dword((d)->sad_all, (offset) + (i) * 8, &(reg))
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#define I10NM_GET_HBM_IMC_BAR(d, reg) \
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pci_read_config_dword((d)->uracu, 0xd4, &(reg))
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#define I10NM_GET_CAPID3_CFG(d, reg) \
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pci_read_config_dword((d)->pcu_cr3, 0x90, &(reg))
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#define I10NM_GET_DIMMMTR(m, i, j) \
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readl((m)->mbase + ((m)->hbm_mc ? 0x80c : 0x2080c) + \
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(i) * (m)->chan_mmio_sz + (j) * 4)
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#define I10NM_GET_MCDDRTCFG(m, i, j) \
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readl((m)->mbase + ((m)->hbm_mc ? 0x970 : 0x20970) + \
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(i) * (m)->chan_mmio_sz + (j) * 4)
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#define I10NM_GET_MCMTR(m, i) \
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readl((m)->mbase + ((m)->hbm_mc ? 0xef8 : 0x20ef8) + \
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(i) * (m)->chan_mmio_sz)
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#define I10NM_GET_AMAP(m, i) \
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readl((m)->mbase + ((m)->hbm_mc ? 0x814 : 0x20814) + \
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(i) * (m)->chan_mmio_sz)
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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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#define I10NM_GET_HBM_IMC_MMIO_OFFSET(reg) \
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((GET_BITFIELD(reg, 0, 10) << 12) + 0x140000)
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#define I10NM_HBM_IMC_MMIO_SIZE 0x9000
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#define I10NM_IS_HBM_PRESENT(reg) GET_BITFIELD(reg, 27, 30)
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#define I10NM_IS_HBM_IMC(reg) GET_BITFIELD(reg, 29, 29)
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#define I10NM_MAX_SAD 16
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#define I10NM_SAD_ENABLE(reg) GET_BITFIELD(reg, 0, 0)
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#define I10NM_SAD_NM_CACHEABLE(reg) GET_BITFIELD(reg, 5, 5)
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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 bool i10nm_check_2lm(struct res_config *cfg)
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{
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struct skx_dev *d;
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u32 reg;
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int i;
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list_for_each_entry(d, i10nm_edac_list, list) {
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d->sad_all = pci_get_dev_wrapper(d->seg, d->bus[1],
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PCI_SLOT(cfg->sad_all_devfn),
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PCI_FUNC(cfg->sad_all_devfn));
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if (!d->sad_all)
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continue;
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for (i = 0; i < I10NM_MAX_SAD; i++) {
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I10NM_GET_SAD(d, cfg->sad_all_offset, i, reg);
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if (I10NM_SAD_ENABLE(reg) && I10NM_SAD_NM_CACHEABLE(reg)) {
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edac_dbg(2, "2-level memory configuration.\n");
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return true;
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}
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}
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}
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return false;
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}
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static int i10nm_get_ddr_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_DDR_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 bool i10nm_check_hbm_imc(struct skx_dev *d)
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{
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u32 reg;
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if (I10NM_GET_CAPID3_CFG(d, reg)) {
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i10nm_printk(KERN_ERR, "Failed to get capid3_cfg\n");
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return false;
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}
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return I10NM_IS_HBM_PRESENT(reg) != 0;
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}
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static int i10nm_get_hbm_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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u32 reg, off, mcmtr;
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struct skx_dev *d;
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int i, lmc;
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u64 base;
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list_for_each_entry(d, i10nm_edac_list, list) {
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d->pcu_cr3 = pci_get_dev_wrapper(d->seg, d->bus[1], 30, 3);
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if (!d->pcu_cr3)
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return -ENODEV;
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if (!i10nm_check_hbm_imc(d)) {
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i10nm_printk(KERN_DEBUG, "No hbm memory\n");
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return -ENODEV;
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}
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if (I10NM_GET_SCK_BAR(d, reg)) {
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i10nm_printk(KERN_ERR, "Failed to get 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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if (I10NM_GET_HBM_IMC_BAR(d, reg)) {
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i10nm_printk(KERN_ERR, "Failed to get hbm mc bar\n");
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return -ENODEV;
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}
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base += I10NM_GET_HBM_IMC_MMIO_OFFSET(reg);
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lmc = I10NM_NUM_DDR_IMC;
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for (i = 0; i < I10NM_NUM_HBM_IMC; i++) {
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mdev = pci_get_dev_wrapper(d->seg, d->bus[0],
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12 + i / 4, 1 + i % 4);
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if (i == 0 && !mdev) {
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i10nm_printk(KERN_ERR, "No hbm mc 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[lmc].mdev = mdev;
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off = i * I10NM_HBM_IMC_MMIO_SIZE;
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edac_dbg(2, "hbm mc%d mmio base 0x%llx size 0x%x\n",
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lmc, base + off, I10NM_HBM_IMC_MMIO_SIZE);
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mbase = ioremap(base + off, I10NM_HBM_IMC_MMIO_SIZE);
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if (!mbase) {
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i10nm_printk(KERN_ERR, "Failed to ioremap for hbm mc 0x%llx\n",
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base + off);
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return -ENOMEM;
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}
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d->imc[lmc].mbase = mbase;
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d->imc[lmc].hbm_mc = true;
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mcmtr = I10NM_GET_MCMTR(&d->imc[lmc], 0);
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if (!I10NM_IS_HBM_IMC(mcmtr)) {
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i10nm_printk(KERN_ERR, "This isn't an hbm mc!\n");
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return -ENODEV;
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}
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lmc++;
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}
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}
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return 0;
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}
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static struct res_config i10nm_cfg0 = {
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.type = I10NM,
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.decs_did = 0x3452,
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.busno_cfg_offset = 0xcc,
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.ddr_chan_mmio_sz = 0x4000,
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.sad_all_devfn = PCI_DEVFN(29, 0),
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.sad_all_offset = 0x108,
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};
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static struct res_config i10nm_cfg1 = {
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.type = I10NM,
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.decs_did = 0x3452,
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.busno_cfg_offset = 0xd0,
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.ddr_chan_mmio_sz = 0x4000,
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.sad_all_devfn = PCI_DEVFN(29, 0),
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.sad_all_offset = 0x108,
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};
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static struct res_config spr_cfg = {
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.type = SPR,
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.decs_did = 0x3252,
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.busno_cfg_offset = 0xd0,
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.ddr_chan_mmio_sz = 0x8000,
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.hbm_chan_mmio_sz = 0x4000,
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.support_ddr5 = true,
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.sad_all_devfn = PCI_DEVFN(10, 0),
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.sad_all_offset = 0x300,
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};
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static const struct x86_cpu_id i10nm_cpuids[] = {
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X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(ATOM_TREMONT_D, X86_STEPPINGS(0x0, 0x3), &i10nm_cfg0),
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X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(ATOM_TREMONT_D, X86_STEPPINGS(0x4, 0xf), &i10nm_cfg1),
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X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(ICELAKE_X, X86_STEPPINGS(0x0, 0x3), &i10nm_cfg0),
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X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(ICELAKE_X, X86_STEPPINGS(0x4, 0xf), &i10nm_cfg1),
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X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(ICELAKE_D, X86_STEPPINGS(0x0, 0xf), &i10nm_cfg1),
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X86_MATCH_INTEL_FAM6_MODEL_STEPPINGS(SAPPHIRERAPIDS_X, X86_STEPPINGS(0x0, 0xf), &spr_cfg),
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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 = I10NM_GET_MCMTR(imc, chan);
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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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struct res_config *cfg)
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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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u32 mtr, amap, mcddrtcfg;
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struct dimm_info *dimm;
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int i, j, ndimms;
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for (i = 0; i < imc->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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amap = I10NM_GET_AMAP(imc, i);
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for (j = 0; j < imc->num_dimms; j++) {
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dimm = edac_get_dimm(mci, 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, amap, dimm,
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imc, i, j, cfg);
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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, i)) {
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i10nm_printk(KERN_ERR, "ECC is disabled on imc %d channel %d\n",
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imc->mc, i);
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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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#ifdef CONFIG_EDAC_DEBUG
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/*
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* Debug feature.
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* Exercise the address decode logic by writing an address to
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* /sys/kernel/debug/edac/i10nm_test/addr.
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*/
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static struct dentry *i10nm_test;
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static int debugfs_u64_set(void *data, u64 val)
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{
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struct mce m;
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pr_warn_once("Fake error to 0x%llx injected via debugfs\n", val);
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memset(&m, 0, sizeof(m));
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/* ADDRV + MemRd + Unknown channel */
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m.status = MCI_STATUS_ADDRV + 0x90;
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/* One corrected error */
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m.status |= BIT_ULL(MCI_STATUS_CEC_SHIFT);
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m.addr = val;
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skx_mce_check_error(NULL, 0, &m);
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return 0;
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}
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DEFINE_SIMPLE_ATTRIBUTE(fops_u64_wo, NULL, debugfs_u64_set, "%llu\n");
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static void setup_i10nm_debug(void)
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{
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i10nm_test = edac_debugfs_create_dir("i10nm_test");
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if (!i10nm_test)
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return;
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if (!edac_debugfs_create_file("addr", 0200, i10nm_test,
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NULL, &fops_u64_wo)) {
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debugfs_remove(i10nm_test);
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i10nm_test = NULL;
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}
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}
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static void teardown_i10nm_debug(void)
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{
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debugfs_remove_recursive(i10nm_test);
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}
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#else
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static inline void setup_i10nm_debug(void) {}
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static inline void teardown_i10nm_debug(void) {}
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#endif /*CONFIG_EDAC_DEBUG*/
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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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struct res_config *cfg;
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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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if (cpu_feature_enabled(X86_FEATURE_HYPERVISOR))
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return -ENODEV;
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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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cfg = (struct res_config *)id->driver_data;
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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(cfg, &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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skx_set_mem_cfg(i10nm_check_2lm(cfg));
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rc = i10nm_get_ddr_munits();
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if (i10nm_get_hbm_munits() && rc)
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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, 0xf8, &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);
|
|
if (rc < 0)
|
|
goto fail;
|
|
|
|
edac_dbg(2, "src_id = %d node_id = %d\n", src_id, node_id);
|
|
for (i = 0; i < I10NM_NUM_IMC; i++) {
|
|
if (!d->imc[i].mdev)
|
|
continue;
|
|
|
|
d->imc[i].mc = mc++;
|
|
d->imc[i].lmc = i;
|
|
d->imc[i].src_id = src_id;
|
|
d->imc[i].node_id = node_id;
|
|
if (d->imc[i].hbm_mc) {
|
|
d->imc[i].chan_mmio_sz = cfg->hbm_chan_mmio_sz;
|
|
d->imc[i].num_channels = I10NM_NUM_HBM_CHANNELS;
|
|
d->imc[i].num_dimms = I10NM_NUM_HBM_DIMMS;
|
|
} else {
|
|
d->imc[i].chan_mmio_sz = cfg->ddr_chan_mmio_sz;
|
|
d->imc[i].num_channels = I10NM_NUM_DDR_CHANNELS;
|
|
d->imc[i].num_dimms = I10NM_NUM_DDR_DIMMS;
|
|
}
|
|
|
|
rc = skx_register_mci(&d->imc[i], d->imc[i].mdev,
|
|
"Intel_10nm Socket", EDAC_MOD_STR,
|
|
i10nm_get_dimm_config, cfg);
|
|
if (rc < 0)
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
rc = skx_adxl_get();
|
|
if (rc)
|
|
goto fail;
|
|
|
|
opstate_init();
|
|
mce_register_decode_chain(&i10nm_mce_dec);
|
|
setup_i10nm_debug();
|
|
|
|
i10nm_printk(KERN_INFO, "%s\n", I10NM_REVISION);
|
|
|
|
return 0;
|
|
fail:
|
|
skx_remove();
|
|
return rc;
|
|
}
|
|
|
|
static void __exit i10nm_exit(void)
|
|
{
|
|
edac_dbg(2, "\n");
|
|
teardown_i10nm_debug();
|
|
mce_unregister_decode_chain(&i10nm_mce_dec);
|
|
skx_adxl_put();
|
|
skx_remove();
|
|
}
|
|
|
|
module_init(i10nm_init);
|
|
module_exit(i10nm_exit);
|
|
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_DESCRIPTION("MC Driver for Intel 10nm server processors");
|