[PATCH 3/6] EDAC/i10nm: Add support for high bandwidth memory

From: Tony Luck
Date: Fri Jun 11 2021 - 13:02:14 EST

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From: Qiuxu Zhuo <qiuxu.zhuo@xxxxxxxxx>

A future Xeon processor will include in-package HBM (high bandwidth
memory). The in-package HBM memory controller shares the same
architecture with the regular DDR memory controller.

Add the HBM memory controller devices for EDAC support.

Tested-by: Hongyu Ning <hongyu.ning@xxxxxxxxxxxxxxx>
Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@xxxxxxxxx>
Signed-off-by: Tony Luck <tony.luck@xxxxxxxxx>
---
drivers/edac/i10nm_base.c | 132 ++++++++++++++++++++++++++++++++++----
drivers/edac/skx_common.c | 15 +++--
drivers/edac/skx_common.h | 20 +++++-
3 files changed, 148 insertions(+), 19 deletions(-)

diff --git a/drivers/edac/i10nm_base.c b/drivers/edac/i10nm_base.c
index 91431d8922a0..fb7e72d3fd2c 100644
--- a/drivers/edac/i10nm_base.c
+++ b/drivers/edac/i10nm_base.c
@@ -13,7 +13,7 @@
#include "edac_module.h"
#include "skx_common.h"

-#define I10NM_REVISION "v0.0.4"
+#define I10NM_REVISION "v0.0.5"
#define EDAC_MOD_STR "i10nm_edac"

/* Debug macros */
@@ -26,19 +26,33 @@
pci_read_config_dword((d)->uracu, 0xd8 + (i) * 4, &(reg))
#define I10NM_GET_SAD(d, offset, i, reg)\
pci_read_config_dword((d)->sad_all, (offset) + (i) * 8, &(reg))
+#define I10NM_GET_HBM_IMC_BAR(d, reg) \
+ pci_read_config_dword((d)->uracu, 0xd4, &(reg))
+#define I10NM_GET_CAPID3_CFG(d, reg) \
+ pci_read_config_dword((d)->pcu_cr3, 0x90, &(reg))
#define I10NM_GET_DIMMMTR(m, i, j) \
- readl((m)->mbase + 0x2080c + (i) * (m)->chan_mmio_sz + (j) * 4)
+ readl((m)->mbase + ((m)->hbm_mc ? 0x80c : 0x2080c) + \
+ (i) * (m)->chan_mmio_sz + (j) * 4)
#define I10NM_GET_MCDDRTCFG(m, i, j) \
- readl((m)->mbase + 0x20970 + (i) * (m)->chan_mmio_sz + (j) * 4)
+ readl((m)->mbase + ((m)->hbm_mc ? 0x970 : 0x20970) + \
+ (i) * (m)->chan_mmio_sz + (j) * 4)
#define I10NM_GET_MCMTR(m, i) \
- readl((m)->mbase + 0x20ef8 + (i) * (m)->chan_mmio_sz)
+ readl((m)->mbase + ((m)->hbm_mc ? 0xef8 : 0x20ef8) + \
+ (i) * (m)->chan_mmio_sz)
#define I10NM_GET_AMAP(m, i) \
- readl((m)->mbase + 0x20814 + (i) * (m)->chan_mmio_sz)
+ readl((m)->mbase + ((m)->hbm_mc ? 0x814 : 0x20814) + \
+ (i) * (m)->chan_mmio_sz)

#define I10NM_GET_SCK_MMIO_BASE(reg) (GET_BITFIELD(reg, 0, 28) << 23)
#define I10NM_GET_IMC_MMIO_OFFSET(reg) (GET_BITFIELD(reg, 0, 10) << 12)
#define I10NM_GET_IMC_MMIO_SIZE(reg) ((GET_BITFIELD(reg, 13, 23) - \
GET_BITFIELD(reg, 0, 10) + 1) << 12)
+#define I10NM_GET_HBM_IMC_MMIO_OFFSET(reg) \
+ ((GET_BITFIELD(reg, 0, 10) << 12) + 0x140000)
+
+#define I10NM_HBM_IMC_MMIO_SIZE 0x9000
+#define I10NM_IS_HBM_PRESENT(reg) GET_BITFIELD(reg, 27, 30)
+#define I10NM_IS_HBM_IMC(reg) GET_BITFIELD(reg, 29, 29)

#define I10NM_MAX_SAD 16
#define I10NM_SAD_ENABLE(reg) GET_BITFIELD(reg, 0, 0)
@@ -94,7 +108,7 @@ static bool i10nm_check_2lm(struct res_config *cfg)
return false;
}

-static int i10nm_get_all_munits(void)
+static int i10nm_get_ddr_munits(void)
{
struct pci_dev *mdev;
void __iomem *mbase;
@@ -122,7 +136,7 @@ static int i10nm_get_all_munits(void)
edac_dbg(2, "socket%d mmio base 0x%llx (reg 0x%x)\n",
j++, base, reg);

- for (i = 0; i < I10NM_NUM_IMC; i++) {
+ for (i = 0; i < I10NM_NUM_DDR_IMC; i++) {
mdev = pci_get_dev_wrapper(d->seg, d->bus[0],
12 + i, 0);
if (i == 0 && !mdev) {
@@ -158,6 +172,90 @@ static int i10nm_get_all_munits(void)
return 0;
}

+static bool i10nm_check_hbm_imc(struct skx_dev *d)
+{
+ u32 reg;
+
+ if (I10NM_GET_CAPID3_CFG(d, reg)) {
+ i10nm_printk(KERN_ERR, "Failed to get capid3_cfg\n");
+ return false;
+ }
+
+ return I10NM_IS_HBM_PRESENT(reg) != 0;
+}
+
+static int i10nm_get_hbm_munits(void)
+{
+ struct pci_dev *mdev;
+ void __iomem *mbase;
+ u32 reg, off, mcmtr;
+ struct skx_dev *d;
+ int i, lmc;
+ u64 base;
+
+ list_for_each_entry(d, i10nm_edac_list, list) {
+ d->pcu_cr3 = pci_get_dev_wrapper(d->seg, d->bus[1], 30, 3);
+ if (!d->pcu_cr3)
+ return -ENODEV;
+
+ if (!i10nm_check_hbm_imc(d)) {
+ i10nm_printk(KERN_DEBUG, "No hbm memory\n");
+ return -ENODEV;
+ }
+
+ if (I10NM_GET_SCK_BAR(d, reg)) {
+ i10nm_printk(KERN_ERR, "Failed to get socket bar\n");
+ return -ENODEV;
+ }
+ base = I10NM_GET_SCK_MMIO_BASE(reg);
+
+ if (I10NM_GET_HBM_IMC_BAR(d, reg)) {
+ i10nm_printk(KERN_ERR, "Failed to get hbm mc bar\n");
+ return -ENODEV;
+ }
+ base += I10NM_GET_HBM_IMC_MMIO_OFFSET(reg);
+
+ lmc = I10NM_NUM_DDR_IMC;
+
+ for (i = 0; i < I10NM_NUM_HBM_IMC; i++) {
+ mdev = pci_get_dev_wrapper(d->seg, d->bus[0],
+ 12 + i / 4, 1 + i % 4);
+ if (i == 0 && !mdev) {
+ i10nm_printk(KERN_ERR, "No hbm mc found\n");
+ return -ENODEV;
+ }
+ if (!mdev)
+ continue;
+
+ d->imc[lmc].mdev = mdev;
+ off = i * I10NM_HBM_IMC_MMIO_SIZE;
+
+ edac_dbg(2, "hbm mc%d mmio base 0x%llx size 0x%x\n",
+ lmc, base + off, I10NM_HBM_IMC_MMIO_SIZE);
+
+ mbase = ioremap(base + off, I10NM_HBM_IMC_MMIO_SIZE);
+ if (!mbase) {
+ i10nm_printk(KERN_ERR, "Failed to ioremap for hbm mc 0x%llx\n",
+ base + off);
+ return -ENOMEM;
+ }
+
+ d->imc[lmc].mbase = mbase;
+ d->imc[lmc].hbm_mc = true;
+
+ mcmtr = I10NM_GET_MCMTR(&d->imc[lmc], 0);
+ if (!I10NM_IS_HBM_IMC(mcmtr)) {
+ i10nm_printk(KERN_ERR, "This isn't an hbm mc!\n");
+ return -ENODEV;
+ }
+
+ lmc++;
+ }
+ }
+
+ return 0;
+}
+
static struct res_config i10nm_cfg0 = {
.type = I10NM,
.decs_did = 0x3452,
@@ -181,6 +279,7 @@ static struct res_config spr_cfg = {
.decs_did = 0x3252,
.busno_cfg_offset = 0xd0,
.ddr_chan_mmio_sz = 0x8000,
+ .hbm_chan_mmio_sz = 0x4000,
.support_ddr5 = true,
.sad_all_devfn = PCI_DEVFN(10, 0),
.sad_all_offset = 0x300,
@@ -216,13 +315,13 @@ static int i10nm_get_dimm_config(struct mem_ctl_info *mci,
struct dimm_info *dimm;
int i, j, ndimms;

- for (i = 0; i < I10NM_NUM_CHANNELS; i++) {
+ for (i = 0; i < imc->num_channels; i++) {
if (!imc->mbase)
continue;

ndimms = 0;
amap = I10NM_GET_AMAP(imc, i);
- for (j = 0; j < I10NM_NUM_DIMMS; j++) {
+ for (j = 0; j < imc->num_dimms; j++) {
dimm = edac_get_dimm(mci, i, j, 0);
mtr = I10NM_GET_DIMMMTR(imc, i, j);
mcddrtcfg = I10NM_GET_MCDDRTCFG(imc, i, j);
@@ -335,8 +434,9 @@ static int __init i10nm_init(void)

skx_set_mem_cfg(i10nm_check_2lm(cfg));

- rc = i10nm_get_all_munits();
- if (rc < 0)
+ rc = i10nm_get_ddr_munits();
+
+ if (i10nm_get_hbm_munits() && rc)
goto fail;

list_for_each_entry(d, i10nm_edac_list, list) {
@@ -357,7 +457,15 @@ static int __init i10nm_init(void)
d->imc[i].lmc = i;
d->imc[i].src_id = src_id;
d->imc[i].node_id = node_id;
- d->imc[i].chan_mmio_sz = cfg->ddr_chan_mmio_sz;
+ 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,
diff --git a/drivers/edac/skx_common.c b/drivers/edac/skx_common.c
index c8691abb720d..5e83f59bef8a 100644
--- a/drivers/edac/skx_common.c
+++ b/drivers/edac/skx_common.c
@@ -343,9 +343,9 @@ int skx_get_dimm_info(u32 mtr, u32 mcmtr, u32 amap, struct dimm_info *dimm,

ranks = numrank(mtr);
rows = numrow(mtr);
- cols = numcol(mtr);
+ cols = imc->hbm_mc ? 6 : numcol(mtr);

- if (cfg->support_ddr5 && (amap & 0x8)) {
+ if (cfg->support_ddr5 && ((amap & 0x8) || imc->hbm_mc)) {
banks = 32;
mtype = MEM_DDR5;
} else {
@@ -374,8 +374,13 @@ int skx_get_dimm_info(u32 mtr, u32 mcmtr, u32 amap, struct dimm_info *dimm,
dimm->dtype = get_width(mtr);
dimm->mtype = mtype;
dimm->edac_mode = EDAC_SECDED; /* likely better than this */
- snprintf(dimm->label, sizeof(dimm->label), "CPU_SrcID#%u_MC#%u_Chan#%u_DIMM#%u",
- imc->src_id, imc->lmc, chan, dimmno);
+
+ if (imc->hbm_mc)
+ snprintf(dimm->label, sizeof(dimm->label), "CPU_SrcID#%u_HBMC#%u_Chan#%u",
+ imc->src_id, imc->lmc, chan);
+ else
+ snprintf(dimm->label, sizeof(dimm->label), "CPU_SrcID#%u_MC#%u_Chan#%u_DIMM#%u",
+ imc->src_id, imc->lmc, chan, dimmno);

return 1;
}
@@ -703,6 +708,8 @@ void skx_remove(void)
}
if (d->util_all)
pci_dev_put(d->util_all);
+ if (d->pcu_cr3)
+ pci_dev_put(d->pcu_cr3);
if (d->sad_all)
pci_dev_put(d->sad_all);
if (d->uracu)
diff --git a/drivers/edac/skx_common.h b/drivers/edac/skx_common.h
index 34e89f7ddf93..01f67e731766 100644
--- a/drivers/edac/skx_common.h
+++ b/drivers/edac/skx_common.h
@@ -32,9 +32,17 @@
#define SKX_NUM_CHANNELS 3 /* Channels per memory controller */
#define SKX_NUM_DIMMS 2 /* Max DIMMS per channel */

-#define I10NM_NUM_IMC 4
-#define I10NM_NUM_CHANNELS 2
-#define I10NM_NUM_DIMMS 2
+#define I10NM_NUM_DDR_IMC 4
+#define I10NM_NUM_DDR_CHANNELS 2
+#define I10NM_NUM_DDR_DIMMS 2
+
+#define I10NM_NUM_HBM_IMC 16
+#define I10NM_NUM_HBM_CHANNELS 2
+#define I10NM_NUM_HBM_DIMMS 1
+
+#define I10NM_NUM_IMC (I10NM_NUM_DDR_IMC + I10NM_NUM_HBM_IMC)
+#define I10NM_NUM_CHANNELS MAX(I10NM_NUM_DDR_CHANNELS, I10NM_NUM_HBM_CHANNELS)
+#define I10NM_NUM_DIMMS MAX(I10NM_NUM_DDR_DIMMS, I10NM_NUM_HBM_DIMMS)

#define MAX(a, b) ((a) > (b) ? (a) : (b))
#define NUM_IMC MAX(SKX_NUM_IMC, I10NM_NUM_IMC)
@@ -56,12 +64,16 @@ struct skx_dev {
struct pci_dev *sad_all;
struct pci_dev *util_all;
struct pci_dev *uracu; /* for i10nm CPU */
+ struct pci_dev *pcu_cr3; /* for HBM memory detection */
u32 mcroute;
struct skx_imc {
struct mem_ctl_info *mci;
struct pci_dev *mdev; /* for i10nm CPU */
void __iomem *mbase; /* for i10nm CPU */
int chan_mmio_sz; /* for i10nm CPU */
+ int num_channels; /* channels per memory controller */
+ int num_dimms; /* dimms per channel */
+ bool hbm_mc;
u8 mc; /* system wide mc# */
u8 lmc; /* socket relative mc# */
u8 src_id, node_id;
@@ -132,6 +144,8 @@ struct res_config {
int busno_cfg_offset;
/* Per DDR channel memory-mapped I/O size */
int ddr_chan_mmio_sz;
+ /* Per HBM channel memory-mapped I/O size */
+ int hbm_chan_mmio_sz;
bool support_ddr5;
/* SAD device number and function number */
unsigned int sad_all_devfn;
--
2.29.2

Next message: Bjorn Andersson: "[PATCH v2] drm/msm/dpu: Avoid ABBA deadlock between IRQ modules"
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