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Date: Fri, 2 Aug 2013 17:43:04 -0500
From: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@....com>
To: <tglx@...utronix.de>, <mingo@...hat.com>, <hpa@...or.com>,
<dougthompson@...ssion.com>, <bp@...en8.de>, <bhelgaas@...gle.com>,
<jbeulich@...e.com>, <linux-kernel@...r.kernel.org>,
<linux-edac@...r.kernel.org>, <linux-pci@...r.kernel.org>
CC: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@....com>
Subject: [PATCH 3/3 V2] EDAC, AMD64_EDAC: Add ECC decoding support for newer F15h models.
Adding support for handling ECC error decoding for new F15 models.
On newer models, support has been included for upto 4 DCT's,
however, only DCT0 and DCT3 are currently configured. (Refer BKDG Section 2.10)
There is also a new "Routing DRAM Requests" algorithm for this model.
Tested on Fam15h M30h with ECC turned on using mce_amd_inj facility and
verified to be functionally correct.
Signed-off-by: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@....com>
diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index 8b6a034..42dab12 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -123,7 +123,11 @@ static void f15h_select_dct(struct amd64_pvt *pvt, u8 dct)
u32 reg = 0;
amd64_read_pci_cfg(pvt->F1, DCT_CFG_SEL, ®);
- reg &= 0xfffffffe;
+ /*
+ * If Fam15h M30h, mask out last two bits for programming dct.
+ * Else, only mask out the last bit.
+ */
+ reg &= (F15_M30H_CPUS) ? 0xfffffffc : 0xfffffff8;
reg |= dct;
amd64_write_pci_cfg(pvt->F1, DCT_CFG_SEL, reg);
}
@@ -133,8 +137,12 @@ static int f15_read_dct_pci_cfg(struct amd64_pvt *pvt, int addr, u32 *val,
{
u8 dct = 0;
+ /*
+ * For F15 M30h, the second dct is DCT 3.
+ * Refer BKDG Section 2.10
+ */
if (addr >= 0x140 && addr <= 0x1a0) {
- dct = 1;
+ dct = F15H_M30H_CPU ? 3 : 1;
addr -= 0x100;
}
@@ -205,8 +213,9 @@ static int amd64_set_scrub_rate(struct mem_ctl_info *mci, u32 bw)
if (boot_cpu_data.x86 == 0xf)
min_scrubrate = 0x0;
- /* F15h Erratum #505 */
- if (boot_cpu_data.x86 == 0x15)
+ /* F15h Models 0x00 - 0x0f Erratum #505 */
+ if (boot_cpu_data.x86 == 0x15 &&
+ boot_cpu_data.x86_model != 0x30)
f15h_select_dct(pvt, 0);
return __amd64_set_scrub_rate(pvt->F3, bw, min_scrubrate);
@@ -218,8 +227,9 @@ static int amd64_get_scrub_rate(struct mem_ctl_info *mci)
u32 scrubval = 0;
int i, retval = -EINVAL;
- /* F15h Erratum #505 */
- if (boot_cpu_data.x86 == 0x15)
+ /* F15h Models 0x00 - 0x0f Erratum #505 */
+ if (boot_cpu_data.x86 == 0x15 &&
+ boot_cpu_data.x86_model != 0x30)
f15h_select_dct(pvt, 0);
amd64_read_pci_cfg(pvt->F3, SCRCTRL, &scrubval);
@@ -343,10 +353,10 @@ static void get_cs_base_and_mask(struct amd64_pvt *pvt, int csrow, u8 dct,
addr_shift = 4;
/*
- * F16h needs two addr_shift values: 8 for high and 6 for low
- * (cf. F16h BKDG).
+ * F16h and F15h(model 30h) needs two addr_shift values:
+ * 8 for high and 6 for low (cf. F16h BKDG).
*/
- } else if (boot_cpu_data.x86 == 0x16) {
+ } else if (boot_cpu_data.x86 == 0x16 || F15H_M30H_CPU) {
csbase = pvt->csels[dct].csbases[csrow];
csmask = pvt->csels[dct].csmasks[csrow >> 1];
@@ -743,6 +753,9 @@ static void prep_chip_selects(struct amd64_pvt *pvt)
if (boot_cpu_data.x86 == 0xf && pvt->ext_model < K8_REV_F) {
pvt->csels[0].b_cnt = pvt->csels[1].b_cnt = 8;
pvt->csels[0].m_cnt = pvt->csels[1].m_cnt = 8;
+ } else if (F15H_M30H_CPU) {
+ pvt->csels[0].b_cnt = pvt->csels[1].b_cnt = 4;
+ pvt->csels[0].m_cnt = pvt->csels[1].m_cnt = 2;
} else {
pvt->csels[0].b_cnt = pvt->csels[1].b_cnt = 8;
pvt->csels[0].m_cnt = pvt->csels[1].m_cnt = 4;
@@ -850,9 +863,9 @@ static u64 get_error_address(struct mce *m)
addr = m->addr & GENMASK(start_bit, end_bit);
/*
- * Erratum 637 workaround
+ * Erratum 637 workaround for F15h Models 0x00 - 0x0f
*/
- if (c->x86 == 0x15) {
+ if (c->x86 == 0x15 && c->x86_model != 0x30) {
struct amd64_pvt *pvt;
u64 cc6_base, tmp_addr;
u32 tmp;
@@ -918,6 +931,7 @@ static void read_dram_base_limit_regs(struct amd64_pvt *pvt, unsigned range)
struct amd_northbridge *nb;
struct pci_dev *misc, *f1 = NULL;
struct cpuinfo_x86 *c = &boot_cpu_data;
+ unsigned int pci_func;
int off = range << 3;
u32 llim;
@@ -942,7 +956,12 @@ static void read_dram_base_limit_regs(struct amd64_pvt *pvt, unsigned range)
return;
misc = nb->misc;
- f1 = pci_get_related_function(misc->vendor, PCI_DEVICE_ID_AMD_15H_NB_F1, misc);
+
+ pci_func = (c->x86_model == 0x30) ? PCI_DEVICE_ID_AMD_15H_M30H_NB_F1
+ : PCI_DEVICE_ID_AMD_15H_M30H_NB_F1;
+
+ f1 = pci_get_related_function(misc->vendor, pci_func, misc);
+
if (WARN_ON(!f1))
return;
@@ -1173,7 +1192,8 @@ static int f15_dbam_to_chip_select(struct amd64_pvt *pvt, u8 dct,
}
/*
- * F16h has only limited cs_modes
+ * F16h has only limited cs_modes.
+ * F15 M30h follows the same pattern.
*/
static int f16_dbam_to_chip_select(struct amd64_pvt *pvt, u8 dct,
unsigned cs_mode)
@@ -1218,6 +1238,51 @@ static void read_dram_ctl_register(struct amd64_pvt *pvt)
}
/*
+ * Determine channel (DCT) based on the interleaving mode:
+ * F15h M30h BKDG, 2.10.12 Memory Interleaving Modes.
+ */
+static u8 f15_m30h_determine_channel(struct amd64_pvt *pvt, u64 sys_addr,
+ u8 intlv_en, int num_dcts_intlv, u32 dct_sel)
+{
+ u8 channel = 0;
+ u8 select;
+ u8 intlv_addr = dct_sel_interleave_addr(pvt);
+
+ if (!(intlv_en))
+ return (u8)(dct_sel);
+ /*
+ * If num_dcts_intlv == 2, them consider addr bit 8 or addr bit 9
+ * depending on intlv_addr, then return either channel = 0/1/2/3.
+ * If num_dcts_intlv == 4, consider either bits[8:9] or bits[9:10]
+ * depending on intlv_addr, then return the value obtained.
+ */
+
+ if (num_dcts_intlv == 2) {
+ if (intlv_addr == 0x4)
+ select = (sys_addr >> 8) & BIT(0);
+ else if (intlv_addr == 0x5)
+ select = (sys_addr >> 9) & BIT(0);
+ else
+ return -EINVAL;
+
+ /* If select !=0, upper DCT selected, else lower DCT */
+ channel = select ? 0x3 : 0;
+
+ } else if (num_dcts_intlv == 4) {
+ if (intlv_addr == 0x4)
+ select = (sys_addr >> 8) & 0x3;
+ else if (intlv_addr == 0x5)
+ select = (sys_addr >> 9) & 0x3;
+ else
+ return -EINVAL;
+
+ channel = select;
+ }
+
+ return channel;
+}
+
+/*
* Determine channel (DCT) based on the interleaving mode: F10h BKDG, 2.8.9 Memory
* Interleaving Modes.
*/
@@ -1366,6 +1431,10 @@ static int f1x_lookup_addr_in_dct(u64 in_addr, u8 nid, u8 dct)
(in_addr & cs_mask), (cs_base & cs_mask));
if ((in_addr & cs_mask) == (cs_base & cs_mask)) {
+ if (F15H_M30H_CPU) {
+ cs_found = csrow;
+ break;
+ }
cs_found = f10_process_possible_spare(pvt, dct, csrow);
edac_dbg(1, " MATCH csrow=%d\n", cs_found);
@@ -1492,20 +1561,151 @@ static int f1x_match_to_this_node(struct amd64_pvt *pvt, unsigned range,
return cs_found;
}
-static int f1x_translate_sysaddr_to_cs(struct amd64_pvt *pvt, u64 sys_addr,
- int *chan_sel)
+/*
+ * Routing DRAM Requests algorithm is different for F15h M30h.
+ * It is cleaner to use a brand new function rather than
+ * adding quirks in the more generic 'f1x_match_to_this_node'.
+ * Refer "2.10.5 DRAM Routing Requests" in BKDG for info.
+ */
+static int f15_m30h_match_to_this_node(struct amd64_pvt *pvt, unsigned range,
+ u64 sys_addr, int *chan_sel)
+{
+ int cs_found = -EINVAL;
+ int num_dcts_intlv = 0;
+ u64 chan_addr, chan_offset, high_addr_offset;
+ u64 dct_base, dct_limit;
+ u32 dct_cont_base_reg, dct_cont_limit_reg, tmp;
+ u8 channel, alias_channel, leg_mmio_hole;
+
+
+ /* Read DRAM Control registers specific to F15 M30h. */
+ amd64_read_pci_cfg(pvt->F1, DRAM_CONT_BASE, &dct_cont_base_reg);
+ amd64_read_pci_cfg(pvt->F1, DRAM_CONT_LIMIT, &dct_cont_limit_reg);
+
+ /* Extract F15h M30h specific config */
+ u64 dhar_offset = f10_dhar_offset(pvt);
+ u8 dct_offset_en = (u8) ((dct_cont_base_reg >> 3) & BIT(0));
+ u8 dct_sel = (u8) ((dct_cont_base_reg >> 4) & 0x7);
+ u8 intlv_addr = dct_sel_interleave_addr(pvt);
+ u8 node_id = dram_dst_node(pvt, range);
+ u8 intlv_en = dram_intlv_en(pvt, range);
+
+ edac_dbg(1, "(range %d) SystemAddr= 0x%llx Limit=0x%llx\n",
+ range, sys_addr, get_dram_limit(pvt, range));
+
+ if (!(get_dram_base(pvt, range) <= sys_addr) &&
+ !(get_dram_limit(pvt, range) >= sys_addr))
+ return -EINVAL;
+
+ if (dhar_valid(pvt) &&
+ dhar_base(pvt) <= sys_addr &&
+ sys_addr < BIT_64(32)) {
+ amd64_warn("Huh? Address is in the MMIO hole: 0x%016llx\n",
+ sys_addr);
+ return -EINVAL;
+ }
+
+ /* Verify sys_addr is within DCT Range. */
+ dct_base = (dct_sel_baseaddr(pvt) << 27);
+ dct_limit = (((dct_cont_limit_reg >> 11) & 0x1FFF) << 27) | 0x7FFFFFF;
+ if (!(dct_cont_base_reg & BIT(0)) &&
+ !(dct_base <= sys_addr && dct_limit >= sys_addr)) {
+ return -EINVAL;
+ }
+
+ /* Verify number of dct's that participate in channel interleaving. */
+ num_dcts_intlv = (int) hweight8(intlv_en);
+
+ if (!(num_dcts_intlv % 2 == 0) || (num_dcts_intlv > 4))
+ return -EINVAL;
+
+ channel = f15_m30h_determine_channel(pvt, sys_addr, intlv_en,
+ num_dcts_intlv, dct_sel);
+
+ /* Verify if we stay within the MAX number of channels allowed */
+ if (channel > 4 || channel < 0)
+ return -EINVAL;
+
+ leg_mmio_hole = (u8) (dct_cont_base_reg >> 1 & BIT(0));
+
+ /* Get normalized DCT addr */
+ if (leg_mmio_hole && (sys_addr >= BIT_64(32)))
+ chan_offset = dhar_offset;
+ else
+ chan_offset = dct_base;
+
+ chan_addr = sys_addr - chan_offset;
+
+ /* remove channel interleave */
+ if (num_dcts_intlv == 2) {
+ if (intlv_addr == 0x4)
+ chan_addr = ((chan_addr >> 9) << 8) |
+ (chan_addr & 0xff);
+ else if (intlv_addr == 0x5)
+ chan_addr = ((chan_addr >> 10) << 9) |
+ (chan_addr & 0x1ff);
+ else
+ return -EINVAL;
+
+ } else if (num_dcts_intlv == 4) {
+ if (intlv_addr == 0x4)
+ chan_addr = ((chan_addr >> 10) << 8) |
+ (chan_addr & 0xff);
+ else if (intlv_addr == 0x5)
+ chan_addr = ((chan_addr >> 11) << 9) |
+ (chan_addr & 0x1ff);
+ else
+ return -EINVAL;
+ }
+
+ if (dct_offset_en) {
+ amd64_read_pci_cfg(pvt->F1,
+ DRAM_CONT_HIGH_OFF + (int) channel * 4,
+ &tmp);
+ chan_addr += ((tmp >> 11) & 0xfff) << 27;
+ }
+
+ /* Set DCTCFGSEL = ChannelSelect */
+ f15h_select_dct(pvt, channel);
+
+ edac_dbg(1, " Normalized DCT addr: 0x%llx\n", chan_addr);
+ /* Find the Chip select.. */
+ /*
+ * NOTE: if channel = 3, then alias it to 1.
+ * This is because, in F15 M30h, there is support for
+ * 4 DCT's, but only 2 are currently included in the architecture.
+ * They are DCT0 and DCT3. But we have read all registers of DCT3
+ * into pvt->csels[1]. So we need to use '1' here to get correct
+ * info. Refer F15 M30h BKDG Section 2.10 and 2.10.3 for clarifications
+ */
+
+ alias_channel = (channel == 3) ? 1 : channel;
+
+ cs_found = f1x_lookup_addr_in_dct(chan_addr, node_id, alias_channel);
+
+ if (cs_found >= 0)
+ *chan_sel = alias_channel;
+
+ return cs_found;
+}
+
+static int
+f1x_translate_sysaddr_to_cs(struct amd64_pvt *pvt,
+ u64 sys_addr,
+ int *chan_sel)
{
int cs_found = -EINVAL;
unsigned range;
for (range = 0; range < DRAM_RANGES; range++) {
-
if (!dram_rw(pvt, range))
continue;
-
- if ((get_dram_base(pvt, range) <= sys_addr) &&
- (get_dram_limit(pvt, range) >= sys_addr)) {
-
+ if (F15H_M30H_CPU)
+ cs_found = f15_m30h_match_to_this_node(pvt, range,
+ sys_addr,
+ chan_sel);
+ else if ((get_dram_base(pvt, range) <= sys_addr) &&
+ (get_dram_limit(pvt, range) >= sys_addr)) {
cs_found = f1x_match_to_this_node(pvt, range,
sys_addr, chan_sel);
if (cs_found >= 0)
@@ -1624,6 +1824,17 @@ static struct amd64_family_type amd64_family_types[] = {
.read_dct_pci_cfg = f15_read_dct_pci_cfg,
}
},
+ [F15_M30H_CPUS] = {
+ .ctl_name = "F15h_M30h",
+ .f1_id = PCI_DEVICE_ID_AMD_15H_M30H_NB_F1,
+ .f3_id = PCI_DEVICE_ID_AMD_15H_M30H_NB_F3,
+ .ops = {
+ .early_channel_count = f1x_early_channel_count,
+ .map_sysaddr_to_csrow = f1x_map_sysaddr_to_csrow,
+ .dbam_to_cs = f16_dbam_to_chip_select,
+ .read_dct_pci_cfg = f15_read_dct_pci_cfg,
+ }
+ },
[F16_CPUS] = {
.ctl_name = "F16h",
.f1_id = PCI_DEVICE_ID_AMD_16H_NB_F1,
@@ -2388,27 +2599,44 @@ static void setup_mci_misc_attrs(struct mem_ctl_info *mci,
static struct amd64_family_type *amd64_per_family_init(struct amd64_pvt *pvt)
{
u8 fam = boot_cpu_data.x86;
+ u8 model = boot_cpu_data.x86_model;
struct amd64_family_type *fam_type = NULL;
switch (fam) {
case 0xf:
fam_type = &amd64_family_types[K8_CPUS];
pvt->ops = &amd64_family_types[K8_CPUS].ops;
+ pvt->family = fam;
+ pvt->model = model;
break;
case 0x10:
fam_type = &amd64_family_types[F10_CPUS];
pvt->ops = &amd64_family_types[F10_CPUS].ops;
+ pvt->family = fam;
+ pvt->model = model;
break;
case 0x15:
+ if (model == 0x30) {
+ fam_type = &amd64_family_types[F15_M30H_CPUS];
+ pvt->ops = &amd64_family_types[F15_M30H_CPUS].ops;
+ pvt->family = fam;
+ pvt->model = model;
+ break;
+ }
+
fam_type = &amd64_family_types[F15_CPUS];
pvt->ops = &amd64_family_types[F15_CPUS].ops;
+ pvt->family = fam;
+ pvt->model = model;
break;
case 0x16:
fam_type = &amd64_family_types[F16_CPUS];
pvt->ops = &amd64_family_types[F16_CPUS].ops;
+ pvt->family = fam;
+ pvt->model = model;
break;
default:
@@ -2638,6 +2866,14 @@ static DEFINE_PCI_DEVICE_TABLE(amd64_pci_table) = {
},
{
.vendor = PCI_VENDOR_ID_AMD,
+ .device = PCI_DEVICE_ID_AMD_15H_M30H_NB_F2,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .class = 0,
+ .class_mask = 0,
+ },
+ {
+ .vendor = PCI_VENDOR_ID_AMD,
.device = PCI_DEVICE_ID_AMD_16H_NB_F2,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
diff --git a/drivers/edac/amd64_edac.h b/drivers/edac/amd64_edac.h
index 2c6f113..ff15f14 100644
--- a/drivers/edac/amd64_edac.h
+++ b/drivers/edac/amd64_edac.h
@@ -170,6 +170,8 @@
/*
* PCI-defined configuration space registers
*/
+#define PCI_DEVICE_ID_AMD_15H_M30H_NB_F1 0x141b
+#define PCI_DEVICE_ID_AMD_15H_M30H_NB_F2 0x141c
#define PCI_DEVICE_ID_AMD_15H_NB_F1 0x1601
#define PCI_DEVICE_ID_AMD_15H_NB_F2 0x1602
#define PCI_DEVICE_ID_AMD_16H_NB_F1 0x1531
@@ -181,13 +183,24 @@
#define DRAM_BASE_LO 0x40
#define DRAM_LIMIT_LO 0x44
-#define dram_intlv_en(pvt, i) ((u8)((pvt->ranges[i].base.lo >> 8) & 0x7))
+/*
+ * F15 M30h DRAM Controller Base/Limit
+ * D18F1x2[1C:00]
+ */
+#define DRAM_CONT_BASE 0x200
+#define DRAM_CONT_LIMIT 0x204
+
+/*
+ * F15 M30h DRAM Controller High Addre Offset
+ * D18F1x2[4C:40]
+ */
+#define DRAM_CONT_HIGH_OFF 0x240
+
#define dram_rw(pvt, i) ((u8)(pvt->ranges[i].base.lo & 0x3))
#define dram_intlv_sel(pvt, i) ((u8)((pvt->ranges[i].lim.lo >> 8) & 0x7))
#define dram_dst_node(pvt, i) ((u8)(pvt->ranges[i].lim.lo & 0x7))
#define DHAR 0xf0
-#define dhar_valid(pvt) ((pvt)->dhar & BIT(0))
#define dhar_mem_hoist_valid(pvt) ((pvt)->dhar & BIT(1))
#define dhar_base(pvt) ((pvt)->dhar & 0xff000000)
#define k8_dhar_offset(pvt) (((pvt)->dhar & 0x0000ff00) << 16)
@@ -234,8 +247,6 @@
#define DDR3_MODE BIT(8)
#define DCT_SEL_LO 0x110
-#define dct_sel_baseaddr(pvt) ((pvt)->dct_sel_lo & 0xFFFFF800)
-#define dct_sel_interleave_addr(pvt) (((pvt)->dct_sel_lo >> 6) & 0x3)
#define dct_high_range_enabled(pvt) ((pvt)->dct_sel_lo & BIT(0))
#define dct_interleave_enabled(pvt) ((pvt)->dct_sel_lo & BIT(2))
@@ -293,10 +304,14 @@
/* MSRs */
#define MSR_MCGCTL_NBE BIT(4)
+/* Helper Macro for F15h M30h */
+#define F15H_M30H_CPU ((pvt->family == 0x15) && \
+ (pvt->model == 0x30))
enum amd_families {
K8_CPUS = 0,
F10_CPUS,
F15_CPUS,
+ F15_M30H_CPUS,
F16_CPUS,
NUM_FAMILIES,
};
@@ -337,6 +352,8 @@ struct amd64_pvt {
struct pci_dev *F1, *F2, *F3;
u16 mc_node_id; /* MC index of this MC node */
+ u8 family; /* CPU family */
+ u8 model; /* CPU model */
int ext_model; /* extended model value of this node */
int channel_count;
@@ -414,6 +431,14 @@ static inline u16 extract_syndrome(u64 status)
return ((status >> 47) & 0xff) | ((status >> 16) & 0xff00);
}
+static inline u8 dct_sel_interleave_addr(struct amd64_pvt *pvt)
+{
+ if (F15H_M30H_CPU)
+ return (((pvt->dct_sel_hi >> 9) & 0x1) << 2) |
+ ((pvt->dct_sel_lo >> 6) & 0x3);
+
+ return ((pvt)->dct_sel_lo >> 6) & 0x3;
+}
/*
* per-node ECC settings descriptor
*/
@@ -504,3 +529,33 @@ static inline void enable_caches(void *dummy)
{
write_cr0(read_cr0() & ~X86_CR0_CD);
}
+
+static inline u8 dram_intlv_en(struct amd64_pvt *pvt, unsigned int i)
+{
+ u32 tmp;
+ if (F15H_M30H_CPU) {
+ amd64_read_pci_cfg(pvt->F1, DRAM_CONT_LIMIT, &tmp);
+ return (u8) tmp & 0xF;
+ }
+ return (u8) (pvt->ranges[i].base.lo >> 8) & 0x7;
+}
+
+static inline u8 dhar_valid(struct amd64_pvt *pvt)
+{
+ u32 tmp;
+ if (F15H_M30H_CPU) {
+ amd64_read_pci_cfg(pvt->F1, DRAM_CONT_BASE, &tmp);
+ return (tmp >> 1) & BIT(0);
+ }
+ return (pvt)->dhar & BIT(0);
+}
+
+static inline u32 dct_sel_baseaddr(struct amd64_pvt *pvt)
+{
+ u32 tmp;
+ if (F15H_M30H_CPU) {
+ amd64_read_pci_cfg(pvt->F1, DRAM_CONT_BASE, &tmp);
+ return (tmp >> 11) & 0x1FFF;
+ }
+ return (pvt)->dct_sel_lo & 0xFFFFF800;
+}
--
1.7.10.4
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