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kernel-fxtec-pro1x/drivers/edac/amd64_edac.c
Borislav Petkov 11c75eadaf amd64_edac: Cleanup chipselect handling 
Add a struct representing the DRAM chip select base/limit register
pairs. Concentrate all CS handling in a single function. Also, add CS
looping macros for cleaner, more readable code. While at it, adjust code
to F15h. Finally, do smaller macro names cleanups (remove family names
from register macros) and debug messages clarification.

No functional change.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2011-03-17 14:46:12 +01:00

2727 lines
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#include "amd64_edac.h"
#include <asm/amd_nb.h>
static struct edac_pci_ctl_info *amd64_ctl_pci;
static int report_gart_errors;
module_param(report_gart_errors, int, 0644);
/*
* Set by command line parameter. If BIOS has enabled the ECC, this override is
* cleared to prevent re-enabling the hardware by this driver.
*/
static int ecc_enable_override;
module_param(ecc_enable_override, int, 0644);
static struct msr __percpu *msrs;
/*
* count successfully initialized driver instances for setup_pci_device()
*/
static atomic_t drv_instances = ATOMIC_INIT(0);
/* Per-node driver instances */
static struct mem_ctl_info **mcis;
static struct ecc_settings **ecc_stngs;
/*
* Address to DRAM bank mapping: see F2x80 for K8 and F2x[1,0]80 for Fam10 and
* later.
*/
static int ddr2_dbam_revCG[] = {
[0] = 32,
[1] = 64,
[2] = 128,
[3] = 256,
[4] = 512,
[5] = 1024,
[6] = 2048,
};
static int ddr2_dbam_revD[] = {
[0] = 32,
[1] = 64,
[2 ... 3] = 128,
[4] = 256,
[5] = 512,
[6] = 256,
[7] = 512,
[8 ... 9] = 1024,
[10] = 2048,
};
static int ddr2_dbam[] = { [0] = 128,
[1] = 256,
[2 ... 4] = 512,
[5 ... 6] = 1024,
[7 ... 8] = 2048,
[9 ... 10] = 4096,
[11] = 8192,
};
static int ddr3_dbam[] = { [0] = -1,
[1] = 256,
[2] = 512,
[3 ... 4] = -1,
[5 ... 6] = 1024,
[7 ... 8] = 2048,
[9 ... 10] = 4096,
[11] = 8192,
};
/*
* Valid scrub rates for the K8 hardware memory scrubber. We map the scrubbing
* bandwidth to a valid bit pattern. The 'set' operation finds the 'matching-
* or higher value'.
*
*FIXME: Produce a better mapping/linearisation.
*/
struct scrubrate {
u32 scrubval; /* bit pattern for scrub rate */
u32 bandwidth; /* bandwidth consumed (bytes/sec) */
} scrubrates[] = {
{ 0x01, 1600000000UL},
{ 0x02, 800000000UL},
{ 0x03, 400000000UL},
{ 0x04, 200000000UL},
{ 0x05, 100000000UL},
{ 0x06, 50000000UL},
{ 0x07, 25000000UL},
{ 0x08, 12284069UL},
{ 0x09, 6274509UL},
{ 0x0A, 3121951UL},
{ 0x0B, 1560975UL},
{ 0x0C, 781440UL},
{ 0x0D, 390720UL},
{ 0x0E, 195300UL},
{ 0x0F, 97650UL},
{ 0x10, 48854UL},
{ 0x11, 24427UL},
{ 0x12, 12213UL},
{ 0x13, 6101UL},
{ 0x14, 3051UL},
{ 0x15, 1523UL},
{ 0x16, 761UL},
{ 0x00, 0UL}, /* scrubbing off */
};
static int __amd64_read_pci_cfg_dword(struct pci_dev *pdev, int offset,
u32 *val, const char *func)
{
int err = 0;
err = pci_read_config_dword(pdev, offset, val);
if (err)
amd64_warn("%s: error reading F%dx%03x.\n",
func, PCI_FUNC(pdev->devfn), offset);
return err;
}
int __amd64_write_pci_cfg_dword(struct pci_dev *pdev, int offset,
u32 val, const char *func)
{
int err = 0;
err = pci_write_config_dword(pdev, offset, val);
if (err)
amd64_warn("%s: error writing to F%dx%03x.\n",
func, PCI_FUNC(pdev->devfn), offset);
return err;
}
/*
*
* Depending on the family, F2 DCT reads need special handling:
*
* K8: has a single DCT only
*
* F10h: each DCT has its own set of regs
* DCT0 -> F2x040..
* DCT1 -> F2x140..
*
* F15h: we select which DCT we access using F1x10C[DctCfgSel]
*
*/
static int k8_read_dct_pci_cfg(struct amd64_pvt *pvt, int addr, u32 *val,
const char *func)
{
if (addr >= 0x100)
return -EINVAL;
return __amd64_read_pci_cfg_dword(pvt->F2, addr, val, func);
}
static int f10_read_dct_pci_cfg(struct amd64_pvt *pvt, int addr, u32 *val,
const char *func)
{
return __amd64_read_pci_cfg_dword(pvt->F2, addr, val, func);
}
static int f15_read_dct_pci_cfg(struct amd64_pvt *pvt, int addr, u32 *val,
const char *func)
{
u32 reg = 0;
u8 dct = 0;
if (addr >= 0x140 && addr <= 0x1a0) {
dct = 1;
addr -= 0x100;
}
amd64_read_pci_cfg(pvt->F1, DCT_CFG_SEL, &reg);
reg &= 0xfffffffe;
reg |= dct;
amd64_write_pci_cfg(pvt->F1, DCT_CFG_SEL, reg);
return __amd64_read_pci_cfg_dword(pvt->F2, addr, val, func);
}
/*
* Memory scrubber control interface. For K8, memory scrubbing is handled by
* hardware and can involve L2 cache, dcache as well as the main memory. With
* F10, this is extended to L3 cache scrubbing on CPU models sporting that
* functionality.
*
* This causes the "units" for the scrubbing speed to vary from 64 byte blocks
* (dram) over to cache lines. This is nasty, so we will use bandwidth in
* bytes/sec for the setting.
*
* Currently, we only do dram scrubbing. If the scrubbing is done in software on
* other archs, we might not have access to the caches directly.
*/
/*
* scan the scrub rate mapping table for a close or matching bandwidth value to
* issue. If requested is too big, then use last maximum value found.
*/
static int __amd64_set_scrub_rate(struct pci_dev *ctl, u32 new_bw, u32 min_rate)
{
u32 scrubval;
int i;
/*
* map the configured rate (new_bw) to a value specific to the AMD64
* memory controller and apply to register. Search for the first
* bandwidth entry that is greater or equal than the setting requested
* and program that. If at last entry, turn off DRAM scrubbing.
*/
for (i = 0; i < ARRAY_SIZE(scrubrates); i++) {
/*
* skip scrub rates which aren't recommended
* (see F10 BKDG, F3x58)
*/
if (scrubrates[i].scrubval < min_rate)
continue;
if (scrubrates[i].bandwidth <= new_bw)
break;
/*
* if no suitable bandwidth found, turn off DRAM scrubbing
* entirely by falling back to the last element in the
* scrubrates array.
*/
}
scrubval = scrubrates[i].scrubval;
pci_write_bits32(ctl, K8_SCRCTRL, scrubval, 0x001F);
if (scrubval)
return scrubrates[i].bandwidth;
return 0;
}
static int amd64_set_scrub_rate(struct mem_ctl_info *mci, u32 bw)
{
struct amd64_pvt *pvt = mci->pvt_info;
return __amd64_set_scrub_rate(pvt->F3, bw, pvt->min_scrubrate);
}
static int amd64_get_scrub_rate(struct mem_ctl_info *mci)
{
struct amd64_pvt *pvt = mci->pvt_info;
u32 scrubval = 0;
int i, retval = -EINVAL;
amd64_read_pci_cfg(pvt->F3, K8_SCRCTRL, &scrubval);
scrubval = scrubval & 0x001F;
amd64_debug("pci-read, sdram scrub control value: %d\n", scrubval);
for (i = 0; i < ARRAY_SIZE(scrubrates); i++) {
if (scrubrates[i].scrubval == scrubval) {
retval = scrubrates[i].bandwidth;
break;
}
}
return retval;
}
/*
* returns true if the SysAddr given by sys_addr matches the
* DRAM base/limit associated with node_id
*/
static bool amd64_base_limit_match(struct amd64_pvt *pvt, u64 sys_addr, int nid)
{
u64 addr;
/* The K8 treats this as a 40-bit value. However, bits 63-40 will be
* all ones if the most significant implemented address bit is 1.
* Here we discard bits 63-40. See section 3.4.2 of AMD publication
* 24592: AMD x86-64 Architecture Programmer's Manual Volume 1
* Application Programming.
*/
addr = sys_addr & 0x000000ffffffffffull;
return ((addr >= get_dram_base(pvt, nid)) &&
(addr <= get_dram_limit(pvt, nid)));
}
/*
* Attempt to map a SysAddr to a node. On success, return a pointer to the
* mem_ctl_info structure for the node that the SysAddr maps to.
*
* On failure, return NULL.
*/
static struct mem_ctl_info *find_mc_by_sys_addr(struct mem_ctl_info *mci,
u64 sys_addr)
{
struct amd64_pvt *pvt;
int node_id;
u32 intlv_en, bits;
/*
* Here we use the DRAM Base (section 3.4.4.1) and DRAM Limit (section
* 3.4.4.2) registers to map the SysAddr to a node ID.
*/
pvt = mci->pvt_info;
/*
* The value of this field should be the same for all DRAM Base
* registers. Therefore we arbitrarily choose to read it from the
* register for node 0.
*/
intlv_en = dram_intlv_en(pvt, 0);
if (intlv_en == 0) {
for (node_id = 0; node_id < DRAM_RANGES; node_id++) {
if (amd64_base_limit_match(pvt, sys_addr, node_id))
goto found;
}
goto err_no_match;
}
if (unlikely((intlv_en != 0x01) &&
(intlv_en != 0x03) &&
(intlv_en != 0x07))) {
amd64_warn("DRAM Base[IntlvEn] junk value: 0x%x, BIOS bug?\n", intlv_en);
return NULL;
}
bits = (((u32) sys_addr) >> 12) & intlv_en;
for (node_id = 0; ; ) {
if ((dram_intlv_sel(pvt, node_id) & intlv_en) == bits)
break; /* intlv_sel field matches */
if (++node_id >= DRAM_RANGES)
goto err_no_match;
}
/* sanity test for sys_addr */
if (unlikely(!amd64_base_limit_match(pvt, sys_addr, node_id))) {
amd64_warn("%s: sys_addr 0x%llx falls outside base/limit address"
"range for node %d with node interleaving enabled.\n",
__func__, sys_addr, node_id);
return NULL;
}
found:
return edac_mc_find(node_id);
err_no_match:
debugf2("sys_addr 0x%lx doesn't match any node\n",
(unsigned long)sys_addr);
return NULL;
}
/*
* compute the CS base address of the @csrow on the DRAM controller @dct.
* For details see F2x[5C:40] in the processor's BKDG
*/
static void get_cs_base_and_mask(struct amd64_pvt *pvt, int csrow, u8 dct,
u64 *base, u64 *mask)
{
u64 csbase, csmask, base_bits, mask_bits;
u8 addr_shift;
if (boot_cpu_data.x86 == 0xf && pvt->ext_model < K8_REV_F) {
csbase = pvt->csels[dct].csbases[csrow];
csmask = pvt->csels[dct].csmasks[csrow];
base_bits = GENMASK(21, 31) | GENMASK(9, 15);
mask_bits = GENMASK(21, 29) | GENMASK(9, 15);
addr_shift = 4;
} else {
csbase = pvt->csels[dct].csbases[csrow];
csmask = pvt->csels[dct].csmasks[csrow >> 1];
addr_shift = 8;
if (boot_cpu_data.x86 == 0x15)
base_bits = mask_bits = GENMASK(19,30) | GENMASK(5,13);
else
base_bits = mask_bits = GENMASK(19,28) | GENMASK(5,13);
}
*base = (csbase & base_bits) << addr_shift;
*mask = ~0ULL;
/* poke holes for the csmask */
*mask &= ~(mask_bits << addr_shift);
/* OR them in */
*mask |= (csmask & mask_bits) << addr_shift;
}
#define for_each_chip_select(i, dct, pvt) \
for (i = 0; i < pvt->csels[dct].b_cnt; i++)
#define for_each_chip_select_mask(i, dct, pvt) \
for (i = 0; i < pvt->csels[dct].m_cnt; i++)
/*
* @input_addr is an InputAddr associated with the node given by mci. Return the
* csrow that input_addr maps to, or -1 on failure (no csrow claims input_addr).
*/
static int input_addr_to_csrow(struct mem_ctl_info *mci, u64 input_addr)
{
struct amd64_pvt *pvt;
int csrow;
u64 base, mask;
pvt = mci->pvt_info;
for_each_chip_select(csrow, 0, pvt) {
if (!csrow_enabled(csrow, 0, pvt))
continue;
get_cs_base_and_mask(pvt, csrow, 0, &base, &mask);
mask = ~mask;
if ((input_addr & mask) == (base & mask)) {
debugf2("InputAddr 0x%lx matches csrow %d (node %d)\n",
(unsigned long)input_addr, csrow,
pvt->mc_node_id);
return csrow;
}
}
debugf2("no matching csrow for InputAddr 0x%lx (MC node %d)\n",
(unsigned long)input_addr, pvt->mc_node_id);
return -1;
}
/*
* Obtain info from the DRAM Hole Address Register (section 3.4.8, pub #26094)
* for the node represented by mci. Info is passed back in *hole_base,
* *hole_offset, and *hole_size. Function returns 0 if info is valid or 1 if
* info is invalid. Info may be invalid for either of the following reasons:
*
* - The revision of the node is not E or greater. In this case, the DRAM Hole
* Address Register does not exist.
*
* - The DramHoleValid bit is cleared in the DRAM Hole Address Register,
* indicating that its contents are not valid.
*
* The values passed back in *hole_base, *hole_offset, and *hole_size are
* complete 32-bit values despite the fact that the bitfields in the DHAR
* only represent bits 31-24 of the base and offset values.
*/
int amd64_get_dram_hole_info(struct mem_ctl_info *mci, u64 *hole_base,
u64 *hole_offset, u64 *hole_size)
{
struct amd64_pvt *pvt = mci->pvt_info;
u64 base;
/* only revE and later have the DRAM Hole Address Register */
if (boot_cpu_data.x86 == 0xf && pvt->ext_model < K8_REV_E) {
debugf1(" revision %d for node %d does not support DHAR\n",
pvt->ext_model, pvt->mc_node_id);
return 1;
}
/* valid for Fam10h and above */
if (boot_cpu_data.x86 >= 0x10 &&
(pvt->dhar & DRAM_MEM_HOIST_VALID) == 0) {
debugf1(" Dram Memory Hoisting is DISABLED on this system\n");
return 1;
}
if ((pvt->dhar & DHAR_VALID) == 0) {
debugf1(" Dram Memory Hoisting is DISABLED on this node %d\n",
pvt->mc_node_id);
return 1;
}
/* This node has Memory Hoisting */
/* +------------------+--------------------+--------------------+-----
* | memory | DRAM hole | relocated |
* | [0, (x - 1)] | [x, 0xffffffff] | addresses from |
* | | | DRAM hole |
* | | | [0x100000000, |
* | | | (0x100000000+ |
* | | | (0xffffffff-x))] |
* +------------------+--------------------+--------------------+-----
*
* Above is a diagram of physical memory showing the DRAM hole and the
* relocated addresses from the DRAM hole. As shown, the DRAM hole
* starts at address x (the base address) and extends through address
* 0xffffffff. The DRAM Hole Address Register (DHAR) relocates the
* addresses in the hole so that they start at 0x100000000.
*/
base = dhar_base(pvt);
*hole_base = base;
*hole_size = (0x1ull << 32) - base;
if (boot_cpu_data.x86 > 0xf)
*hole_offset = f10_dhar_offset(pvt);
else
*hole_offset = k8_dhar_offset(pvt);
debugf1(" DHAR info for node %d base 0x%lx offset 0x%lx size 0x%lx\n",
pvt->mc_node_id, (unsigned long)*hole_base,
(unsigned long)*hole_offset, (unsigned long)*hole_size);
return 0;
}
EXPORT_SYMBOL_GPL(amd64_get_dram_hole_info);
/*
* Return the DramAddr that the SysAddr given by @sys_addr maps to. It is
* assumed that sys_addr maps to the node given by mci.
*
* The first part of section 3.4.4 (p. 70) shows how the DRAM Base (section
* 3.4.4.1) and DRAM Limit (section 3.4.4.2) registers are used to translate a
* SysAddr to a DramAddr. If the DRAM Hole Address Register (DHAR) is enabled,
* then it is also involved in translating a SysAddr to a DramAddr. Sections
* 3.4.8 and 3.5.8.2 describe the DHAR and how it is used for memory hoisting.
* These parts of the documentation are unclear. I interpret them as follows:
*
* When node n receives a SysAddr, it processes the SysAddr as follows:
*
* 1. It extracts the DRAMBase and DRAMLimit values from the DRAM Base and DRAM
* Limit registers for node n. If the SysAddr is not within the range
* specified by the base and limit values, then node n ignores the Sysaddr
* (since it does not map to node n). Otherwise continue to step 2 below.
*
* 2. If the DramHoleValid bit of the DHAR for node n is clear, the DHAR is
* disabled so skip to step 3 below. Otherwise see if the SysAddr is within
* the range of relocated addresses (starting at 0x100000000) from the DRAM
* hole. If not, skip to step 3 below. Else get the value of the
* DramHoleOffset field from the DHAR. To obtain the DramAddr, subtract the
* offset defined by this value from the SysAddr.
*
* 3. Obtain the base address for node n from the DRAMBase field of the DRAM
* Base register for node n. To obtain the DramAddr, subtract the base
* address from the SysAddr, as shown near the start of section 3.4.4 (p.70).
*/
static u64 sys_addr_to_dram_addr(struct mem_ctl_info *mci, u64 sys_addr)
{
struct amd64_pvt *pvt = mci->pvt_info;
u64 dram_base, hole_base, hole_offset, hole_size, dram_addr;
int ret = 0;
dram_base = get_dram_base(pvt, pvt->mc_node_id);
ret = amd64_get_dram_hole_info(mci, &hole_base, &hole_offset,
&hole_size);
if (!ret) {
if ((sys_addr >= (1ull << 32)) &&
(sys_addr < ((1ull << 32) + hole_size))) {
/* use DHAR to translate SysAddr to DramAddr */
dram_addr = sys_addr - hole_offset;
debugf2("using DHAR to translate SysAddr 0x%lx to "
"DramAddr 0x%lx\n",
(unsigned long)sys_addr,
(unsigned long)dram_addr);
return dram_addr;
}
}
/*
* Translate the SysAddr to a DramAddr as shown near the start of
* section 3.4.4 (p. 70). Although sys_addr is a 64-bit value, the k8
* only deals with 40-bit values. Therefore we discard bits 63-40 of
* sys_addr below. If bit 39 of sys_addr is 1 then the bits we
* discard are all 1s. Otherwise the bits we discard are all 0s. See
* section 3.4.2 of AMD publication 24592: AMD x86-64 Architecture
* Programmer's Manual Volume 1 Application Programming.
*/
dram_addr = (sys_addr & 0xffffffffffull) - dram_base;
debugf2("using DRAM Base register to translate SysAddr 0x%lx to "
"DramAddr 0x%lx\n", (unsigned long)sys_addr,
(unsigned long)dram_addr);
return dram_addr;
}
/*
* @intlv_en is the value of the IntlvEn field from a DRAM Base register
* (section 3.4.4.1). Return the number of bits from a SysAddr that are used
* for node interleaving.
*/
static int num_node_interleave_bits(unsigned intlv_en)
{
static const int intlv_shift_table[] = { 0, 1, 0, 2, 0, 0, 0, 3 };
int n;
BUG_ON(intlv_en > 7);
n = intlv_shift_table[intlv_en];
return n;
}
/* Translate the DramAddr given by @dram_addr to an InputAddr. */
static u64 dram_addr_to_input_addr(struct mem_ctl_info *mci, u64 dram_addr)
{
struct amd64_pvt *pvt;
int intlv_shift;
u64 input_addr;
pvt = mci->pvt_info;
/*
* See the start of section 3.4.4 (p. 70, BKDG #26094, K8, revA-E)
* concerning translating a DramAddr to an InputAddr.
*/
intlv_shift = num_node_interleave_bits(dram_intlv_en(pvt, 0));
input_addr = ((dram_addr >> intlv_shift) & 0xffffff000ull) +
(dram_addr & 0xfff);
debugf2(" Intlv Shift=%d DramAddr=0x%lx maps to InputAddr=0x%lx\n",
intlv_shift, (unsigned long)dram_addr,
(unsigned long)input_addr);
return input_addr;
}
/*
* Translate the SysAddr represented by @sys_addr to an InputAddr. It is
* assumed that @sys_addr maps to the node given by mci.
*/
static u64 sys_addr_to_input_addr(struct mem_ctl_info *mci, u64 sys_addr)
{
u64 input_addr;
input_addr =
dram_addr_to_input_addr(mci, sys_addr_to_dram_addr(mci, sys_addr));
debugf2("SysAdddr 0x%lx translates to InputAddr 0x%lx\n",
(unsigned long)sys_addr, (unsigned long)input_addr);
return input_addr;
}
/*
* @input_addr is an InputAddr associated with the node represented by mci.
* Translate @input_addr to a DramAddr and return the result.
*/
static u64 input_addr_to_dram_addr(struct mem_ctl_info *mci, u64 input_addr)
{
struct amd64_pvt *pvt;
int node_id, intlv_shift;
u64 bits, dram_addr;
u32 intlv_sel;
/*
* Near the start of section 3.4.4 (p. 70, BKDG #26094, K8, revA-E)
* shows how to translate a DramAddr to an InputAddr. Here we reverse
* this procedure. When translating from a DramAddr to an InputAddr, the
* bits used for node interleaving are discarded. Here we recover these
* bits from the IntlvSel field of the DRAM Limit register (section
* 3.4.4.2) for the node that input_addr is associated with.
*/
pvt = mci->pvt_info;
node_id = pvt->mc_node_id;
BUG_ON((node_id < 0) || (node_id > 7));
intlv_shift = num_node_interleave_bits(dram_intlv_en(pvt, 0));
if (intlv_shift == 0) {
debugf1(" InputAddr 0x%lx translates to DramAddr of "
"same value\n", (unsigned long)input_addr);
return input_addr;
}
bits = ((input_addr & 0xffffff000ull) << intlv_shift) +
(input_addr & 0xfff);
intlv_sel = dram_intlv_sel(pvt, node_id) & ((1 << intlv_shift) - 1);
dram_addr = bits + (intlv_sel << 12);
debugf1("InputAddr 0x%lx translates to DramAddr 0x%lx "
"(%d node interleave bits)\n", (unsigned long)input_addr,
(unsigned long)dram_addr, intlv_shift);
return dram_addr;
}
/*
* @dram_addr is a DramAddr that maps to the node represented by mci. Convert
* @dram_addr to a SysAddr.
*/
static u64 dram_addr_to_sys_addr(struct mem_ctl_info *mci, u64 dram_addr)
{
struct amd64_pvt *pvt = mci->pvt_info;
u64 hole_base, hole_offset, hole_size, base, sys_addr;
int ret = 0;
ret = amd64_get_dram_hole_info(mci, &hole_base, &hole_offset,
&hole_size);
if (!ret) {
if ((dram_addr >= hole_base) &&
(dram_addr < (hole_base + hole_size))) {
sys_addr = dram_addr + hole_offset;
debugf1("using DHAR to translate DramAddr 0x%lx to "
"SysAddr 0x%lx\n", (unsigned long)dram_addr,
(unsigned long)sys_addr);
return sys_addr;
}
}
base = get_dram_base(pvt, pvt->mc_node_id);
sys_addr = dram_addr + base;
/*
* The sys_addr we have computed up to this point is a 40-bit value
* because the k8 deals with 40-bit values. However, the value we are
* supposed to return is a full 64-bit physical address. The AMD
* x86-64 architecture specifies that the most significant implemented
* address bit through bit 63 of a physical address must be either all
* 0s or all 1s. Therefore we sign-extend the 40-bit sys_addr to a
* 64-bit value below. See section 3.4.2 of AMD publication 24592:
* AMD x86-64 Architecture Programmer's Manual Volume 1 Application
* Programming.
*/
sys_addr |= ~((sys_addr & (1ull << 39)) - 1);
debugf1(" Node %d, DramAddr 0x%lx to SysAddr 0x%lx\n",
pvt->mc_node_id, (unsigned long)dram_addr,
(unsigned long)sys_addr);
return sys_addr;
}
/*
* @input_addr is an InputAddr associated with the node given by mci. Translate
* @input_addr to a SysAddr.
*/
static inline u64 input_addr_to_sys_addr(struct mem_ctl_info *mci,
u64 input_addr)
{
return dram_addr_to_sys_addr(mci,
input_addr_to_dram_addr(mci, input_addr));
}
/*
* Find the minimum and maximum InputAddr values that map to the given @csrow.
* Pass back these values in *input_addr_min and *input_addr_max.
*/
static void find_csrow_limits(struct mem_ctl_info *mci, int csrow,
u64 *input_addr_min, u64 *input_addr_max)
{
struct amd64_pvt *pvt;
u64 base, mask;
pvt = mci->pvt_info;
BUG_ON((csrow < 0) || (csrow >= pvt->csels[0].b_cnt));
get_cs_base_and_mask(pvt, csrow, 0, &base, &mask);
*input_addr_min = base & ~mask;
*input_addr_max = base | mask;
}
/* Map the Error address to a PAGE and PAGE OFFSET. */
static inline void error_address_to_page_and_offset(u64 error_address,
u32 *page, u32 *offset)
{
*page = (u32) (error_address >> PAGE_SHIFT);
*offset = ((u32) error_address) & ~PAGE_MASK;
}
/*
* @sys_addr is an error address (a SysAddr) extracted from the MCA NB Address
* Low (section 3.6.4.5) and MCA NB Address High (section 3.6.4.6) registers
* of a node that detected an ECC memory error. mci represents the node that
* the error address maps to (possibly different from the node that detected
* the error). Return the number of the csrow that sys_addr maps to, or -1 on
* error.
*/
static int sys_addr_to_csrow(struct mem_ctl_info *mci, u64 sys_addr)
{
int csrow;
csrow = input_addr_to_csrow(mci, sys_addr_to_input_addr(mci, sys_addr));
if (csrow == -1)
amd64_mc_err(mci, "Failed to translate InputAddr to csrow for "
"address 0x%lx\n", (unsigned long)sys_addr);
return csrow;
}
static int get_channel_from_ecc_syndrome(struct mem_ctl_info *, u16);
static u16 extract_syndrome(struct err_regs *err)
{
return ((err->nbsh >> 15) & 0xff) | ((err->nbsl >> 16) & 0xff00);
}
/*
* Determine if the DIMMs have ECC enabled. ECC is enabled ONLY if all the DIMMs
* are ECC capable.
*/
static enum edac_type amd64_determine_edac_cap(struct amd64_pvt *pvt)
{
int bit;
enum dev_type edac_cap = EDAC_FLAG_NONE;
bit = (boot_cpu_data.x86 > 0xf || pvt->ext_model >= K8_REV_F)
? 19
: 17;
if (pvt->dclr0 & BIT(bit))
edac_cap = EDAC_FLAG_SECDED;
return edac_cap;
}
static void amd64_debug_display_dimm_sizes(int ctrl, struct amd64_pvt *pvt);
static void amd64_dump_dramcfg_low(u32 dclr, int chan)
{
debugf1("F2x%d90 (DRAM Cfg Low): 0x%08x\n", chan, dclr);
debugf1(" DIMM type: %sbuffered; all DIMMs support ECC: %s\n",
(dclr & BIT(16)) ? "un" : "",
(dclr & BIT(19)) ? "yes" : "no");
debugf1(" PAR/ERR parity: %s\n",
(dclr & BIT(8)) ? "enabled" : "disabled");
debugf1(" DCT 128bit mode width: %s\n",
(dclr & BIT(11)) ? "128b" : "64b");
debugf1(" x4 logical DIMMs present: L0: %s L1: %s L2: %s L3: %s\n",
(dclr & BIT(12)) ? "yes" : "no",
(dclr & BIT(13)) ? "yes" : "no",
(dclr & BIT(14)) ? "yes" : "no",
(dclr & BIT(15)) ? "yes" : "no");
}
/* Display and decode various NB registers for debug purposes. */
static void dump_misc_regs(struct amd64_pvt *pvt)
{
debugf1("F3xE8 (NB Cap): 0x%08x\n", pvt->nbcap);
debugf1(" NB two channel DRAM capable: %s\n",
(pvt->nbcap & K8_NBCAP_DCT_DUAL) ? "yes" : "no");
debugf1(" ECC capable: %s, ChipKill ECC capable: %s\n",
(pvt->nbcap & K8_NBCAP_SECDED) ? "yes" : "no",
(pvt->nbcap & K8_NBCAP_CHIPKILL) ? "yes" : "no");
amd64_dump_dramcfg_low(pvt->dclr0, 0);
debugf1("F3xB0 (Online Spare): 0x%08x\n", pvt->online_spare);
debugf1("F1xF0 (DRAM Hole Address): 0x%08x, base: 0x%08x, "
"offset: 0x%08x\n",
pvt->dhar, dhar_base(pvt),
(boot_cpu_data.x86 == 0xf) ? k8_dhar_offset(pvt)
: f10_dhar_offset(pvt));
debugf1(" DramHoleValid: %s\n",
(pvt->dhar & DHAR_VALID) ? "yes" : "no");
amd64_debug_display_dimm_sizes(0, pvt);
/* everything below this point is Fam10h and above */
if (boot_cpu_data.x86 == 0xf)
return;
amd64_debug_display_dimm_sizes(1, pvt);
amd64_info("using %s syndromes.\n", ((pvt->syn_type == 8) ? "x8" : "x4"));
/* Only if NOT ganged does dclr1 have valid info */
if (!dct_ganging_enabled(pvt))
amd64_dump_dramcfg_low(pvt->dclr1, 1);
}
static void amd64_read_dbam_reg(struct amd64_pvt *pvt)
{
amd64_read_dct_pci_cfg(pvt, DBAM0, &pvt->dbam0);
amd64_read_dct_pci_cfg(pvt, DBAM1, &pvt->dbam1);
}
/*
* see BKDG, F2x[1,0][5C:40], F2[1,0][6C:60]
*/
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 {
pvt->csels[0].b_cnt = pvt->csels[1].b_cnt = 8;
pvt->csels[0].m_cnt = pvt->csels[1].m_cnt = 4;
}
}
/*
* Function 2 Offset F10_DCSB0; read in the DCS Base and DCS Mask registers
*/
static void read_dct_base_mask(struct amd64_pvt *pvt)
{
int cs;
prep_chip_selects(pvt);
for_each_chip_select(cs, 0, pvt) {
u32 reg0 = DCSB0 + (cs * 4);
u32 reg1 = DCSB1 + (cs * 4);
u32 *base0 = &pvt->csels[0].csbases[cs];
u32 *base1 = &pvt->csels[1].csbases[cs];
if (!amd64_read_dct_pci_cfg(pvt, reg0, base0))
debugf0(" DCSB0[%d]=0x%08x reg: F2x%x\n",
cs, *base0, reg0);
if (boot_cpu_data.x86 == 0xf || dct_ganging_enabled(pvt))
continue;
if (!amd64_read_dct_pci_cfg(pvt, reg1, base1))
debugf0(" DCSB1[%d]=0x%08x reg: F2x%x\n",
cs, *base1, reg1);
}
for_each_chip_select_mask(cs, 0, pvt) {
u32 reg0 = DCSM0 + (cs * 4);
u32 reg1 = DCSM1 + (cs * 4);
u32 *mask0 = &pvt->csels[0].csmasks[cs];
u32 *mask1 = &pvt->csels[1].csmasks[cs];
if (!amd64_read_dct_pci_cfg(pvt, reg0, mask0))
debugf0(" DCSM0[%d]=0x%08x reg: F2x%x\n",
cs, *mask0, reg0);
if (boot_cpu_data.x86 == 0xf || dct_ganging_enabled(pvt))
continue;
if (!amd64_read_dct_pci_cfg(pvt, reg1, mask1))
debugf0(" DCSM1[%d]=0x%08x reg: F2x%x\n",
cs, *mask1, reg1);
}
}
static enum mem_type amd64_determine_memory_type(struct amd64_pvt *pvt, int cs)
{
enum mem_type type;
if (boot_cpu_data.x86 >= 0x10 || pvt->ext_model >= K8_REV_F) {
if (pvt->dchr0 & DDR3_MODE)
type = (pvt->dclr0 & BIT(16)) ? MEM_DDR3 : MEM_RDDR3;
else
type = (pvt->dclr0 & BIT(16)) ? MEM_DDR2 : MEM_RDDR2;
} else {
type = (pvt->dclr0 & BIT(18)) ? MEM_DDR : MEM_RDDR;
}
amd64_info("CS%d: %s\n", cs, edac_mem_types[type]);
return type;
}
/*
* Read the DRAM Configuration Low register. It differs between CG, D & E revs
* and the later RevF memory controllers (DDR vs DDR2)
*
* Return:
* number of memory channels in operation
* Pass back:
* contents of the DCL0_LOW register
*/
static int k8_early_channel_count(struct amd64_pvt *pvt)
{
int flag, err = 0;
err = amd64_read_dct_pci_cfg(pvt, F10_DCLR_0, &pvt->dclr0);
if (err)
return err;
if (pvt->ext_model >= K8_REV_F)
/* RevF (NPT) and later */
flag = pvt->dclr0 & F10_WIDTH_128;
else
/* RevE and earlier */
flag = pvt->dclr0 & REVE_WIDTH_128;
/* not used */
pvt->dclr1 = 0;
return (flag) ? 2 : 1;
}
/* extract the ERROR ADDRESS for the K8 CPUs */
static u64 k8_get_error_address(struct mem_ctl_info *mci,
struct err_regs *info)
{
return (((u64) (info->nbeah & 0xff)) << 32) +
(info->nbeal & ~0x03);
}
static void read_dram_base_limit_regs(struct amd64_pvt *pvt, unsigned range)
{
u32 off = range << 3;
amd64_read_pci_cfg(pvt->F1, DRAM_BASE_LO + off, &pvt->ranges[range].base.lo);
amd64_read_pci_cfg(pvt->F1, DRAM_LIMIT_LO + off, &pvt->ranges[range].lim.lo);
if (boot_cpu_data.x86 == 0xf)
return;
if (!dram_rw(pvt, range))
return;
amd64_read_pci_cfg(pvt->F1, DRAM_BASE_HI + off, &pvt->ranges[range].base.hi);
amd64_read_pci_cfg(pvt->F1, DRAM_LIMIT_HI + off, &pvt->ranges[range].lim.hi);
}
static void k8_map_sysaddr_to_csrow(struct mem_ctl_info *mci,
struct err_regs *err_info, u64 sys_addr)
{
struct mem_ctl_info *src_mci;
int channel, csrow;
u32 page, offset;
u16 syndrome;
syndrome = extract_syndrome(err_info);
/* CHIPKILL enabled */
if (err_info->nbcfg & K8_NBCFG_CHIPKILL) {
channel = get_channel_from_ecc_syndrome(mci, syndrome);
if (channel < 0) {
/*
* Syndrome didn't map, so we don't know which of the
* 2 DIMMs is in error. So we need to ID 'both' of them
* as suspect.
*/
amd64_mc_warn(mci, "unknown syndrome 0x%04x - possible "
"error reporting race\n", syndrome);
edac_mc_handle_ce_no_info(mci, EDAC_MOD_STR);
return;
}
} else {
/*
* non-chipkill ecc mode
*
* The k8 documentation is unclear about how to determine the
* channel number when using non-chipkill memory. This method
* was obtained from email communication with someone at AMD.
* (Wish the email was placed in this comment - norsk)
*/
channel = ((sys_addr & BIT(3)) != 0);
}
/*
* Find out which node the error address belongs to. This may be
* different from the node that detected the error.
*/
src_mci = find_mc_by_sys_addr(mci, sys_addr);
if (!src_mci) {
amd64_mc_err(mci, "failed to map error addr 0x%lx to a node\n",
(unsigned long)sys_addr);
edac_mc_handle_ce_no_info(mci, EDAC_MOD_STR);
return;
}
/* Now map the sys_addr to a CSROW */
csrow = sys_addr_to_csrow(src_mci, sys_addr);
if (csrow < 0) {
edac_mc_handle_ce_no_info(src_mci, EDAC_MOD_STR);
} else {
error_address_to_page_and_offset(sys_addr, &page, &offset);
edac_mc_handle_ce(src_mci, page, offset, syndrome, csrow,
channel, EDAC_MOD_STR);
}
}
static int k8_dbam_to_chip_select(struct amd64_pvt *pvt, int cs_mode)
{
int *dbam_map;
if (pvt->ext_model >= K8_REV_F)
dbam_map = ddr2_dbam;
else if (pvt->ext_model >= K8_REV_D)
dbam_map = ddr2_dbam_revD;
else
dbam_map = ddr2_dbam_revCG;
return dbam_map[cs_mode];
}
/*
* Get the number of DCT channels in use.
*
* Return:
* number of Memory Channels in operation
* Pass back:
* contents of the DCL0_LOW register
*/
static int f10_early_channel_count(struct amd64_pvt *pvt)
{
int dbams[] = { DBAM0, DBAM1 };
int i, j, channels = 0;
u32 dbam;
/* If we are in 128 bit mode, then we are using 2 channels */
if (pvt->dclr0 & F10_WIDTH_128) {
channels = 2;
return channels;
}
/*
* Need to check if in unganged mode: In such, there are 2 channels,
* but they are not in 128 bit mode and thus the above 'dclr0' status
* bit will be OFF.
*
* Need to check DCT0[0] and DCT1[0] to see if only one of them has
* their CSEnable bit on. If so, then SINGLE DIMM case.
*/
debugf0("Data width is not 128 bits - need more decoding\n");
/*
* Check DRAM Bank Address Mapping values for each DIMM to see if there
* is more than just one DIMM present in unganged mode. Need to check
* both controllers since DIMMs can be placed in either one.
*/
for (i = 0; i < ARRAY_SIZE(dbams); i++) {
if (amd64_read_dct_pci_cfg(pvt, dbams[i], &dbam))
goto err_reg;
for (j = 0; j < 4; j++) {
if (DBAM_DIMM(j, dbam) > 0) {
channels++;
break;
}
}
}
if (channels > 2)
channels = 2;
amd64_info("MCT channel count: %d\n", channels);
return channels;
err_reg:
return -1;
}
static int f10_dbam_to_chip_select(struct amd64_pvt *pvt, int cs_mode)
{
int *dbam_map;
if (pvt->dchr0 & DDR3_MODE || pvt->dchr1 & DDR3_MODE)
dbam_map = ddr3_dbam;
else
dbam_map = ddr2_dbam;
return dbam_map[cs_mode];
}
static u64 f10_get_error_address(struct mem_ctl_info *mci,
struct err_regs *info)
{
return (((u64) (info->nbeah & 0xffff)) << 32) +
(info->nbeal & ~0x01);
}
static void f10_read_dram_ctl_register(struct amd64_pvt *pvt)
{
if (!amd64_read_dct_pci_cfg(pvt, F10_DCTL_SEL_LOW, &pvt->dct_sel_low)) {
debugf0("F2x110 (DCTL Sel. Low): 0x%08x, High range addrs at: 0x%x\n",
pvt->dct_sel_low, dct_sel_baseaddr(pvt));
debugf0(" DCT mode: %s, All DCTs on: %s\n",
(dct_ganging_enabled(pvt) ? "ganged" : "unganged"),
(dct_dram_enabled(pvt) ? "yes" : "no"));
if (!dct_ganging_enabled(pvt))
debugf0(" Address range split per DCT: %s\n",
(dct_high_range_enabled(pvt) ? "yes" : "no"));
debugf0(" DCT data interleave for ECC: %s, "
"DRAM cleared since last warm reset: %s\n",
(dct_data_intlv_enabled(pvt) ? "enabled" : "disabled"),
(dct_memory_cleared(pvt) ? "yes" : "no"));
debugf0(" DCT channel interleave: %s, "
"DCT interleave bits selector: 0x%x\n",
(dct_interleave_enabled(pvt) ? "enabled" : "disabled"),
dct_sel_interleave_addr(pvt));
}
amd64_read_dct_pci_cfg(pvt, F10_DCTL_SEL_HIGH, &pvt->dct_sel_hi);
}
/*
* determine channel based on the interleaving mode: F10h BKDG, 2.8.9 Memory
* Interleaving Modes.
*/
static u8 f10_determine_channel(struct amd64_pvt *pvt, u64 sys_addr,
int hi_range_sel, u32 intlv_en)
{
u32 temp, dct_sel_high = (pvt->dct_sel_low >> 1) & 1;
u8 cs;
if (dct_ganging_enabled(pvt))
cs = 0;
else if (hi_range_sel)
cs = dct_sel_high;
else if (dct_interleave_enabled(pvt)) {
/*
* see F2x110[DctSelIntLvAddr] - channel interleave mode
*/
if (dct_sel_interleave_addr(pvt) == 0)
cs = sys_addr >> 6 & 1;
else if ((dct_sel_interleave_addr(pvt) >> 1) & 1) {
temp = hweight_long((u32) ((sys_addr >> 16) & 0x1F)) % 2;
if (dct_sel_interleave_addr(pvt) & 1)
cs = (sys_addr >> 9 & 1) ^ temp;
else
cs = (sys_addr >> 6 & 1) ^ temp;
} else if (intlv_en & 4)
cs = sys_addr >> 15 & 1;
else if (intlv_en & 2)
cs = sys_addr >> 14 & 1;
else if (intlv_en & 1)
cs = sys_addr >> 13 & 1;
else
cs = sys_addr >> 12 & 1;
} else if (dct_high_range_enabled(pvt) && !dct_ganging_enabled(pvt))
cs = ~dct_sel_high & 1;
else
cs = 0;
return cs;
}
static inline u32 f10_map_intlv_en_to_shift(u32 intlv_en)
{
if (intlv_en == 1)
return 1;
else if (intlv_en == 3)
return 2;
else if (intlv_en == 7)
return 3;
return 0;
}
/* See F10h BKDG, 2.8.10.2 DctSelBaseOffset Programming */
static inline u64 f10_get_base_addr_offset(u64 sys_addr, int hi_range_sel,
u32 dct_sel_base_addr,
u64 dct_sel_base_off,
u32 hole_valid, u64 hole_off,
u64 dram_base)
{
u64 chan_off;
if (hi_range_sel) {
if (!(dct_sel_base_addr & 0xFFFF0000) &&
hole_valid && (sys_addr >= 0x100000000ULL))
chan_off = hole_off;
else
chan_off = dct_sel_base_off;
} else {
if (hole_valid && (sys_addr >= 0x100000000ULL))
chan_off = hole_off;
else
chan_off = dram_base & 0xFFFFF8000000ULL;
}
return (sys_addr & 0x0000FFFFFFFFFFC0ULL) -
(chan_off & 0x0000FFFFFF800000ULL);
}
/* Hack for the time being - Can we get this from BIOS?? */
#define CH0SPARE_RANK 0
#define CH1SPARE_RANK 1
/*
* checks if the csrow passed in is marked as SPARED, if so returns the new
* spare row
*/
static int f10_process_possible_spare(struct amd64_pvt *pvt, u8 dct, int csrow)
{
u32 swap_done;
u32 bad_dram_cs;
/* Depending on channel, isolate respective SPARING info */
if (dct) {
swap_done = F10_ONLINE_SPARE_SWAPDONE1(pvt->online_spare);
bad_dram_cs = F10_ONLINE_SPARE_BADDRAM_CS1(pvt->online_spare);
if (swap_done && (csrow == bad_dram_cs))
csrow = CH1SPARE_RANK;
} else {
swap_done = F10_ONLINE_SPARE_SWAPDONE0(pvt->online_spare);
bad_dram_cs = F10_ONLINE_SPARE_BADDRAM_CS0(pvt->online_spare);
if (swap_done && (csrow == bad_dram_cs))
csrow = CH0SPARE_RANK;
}
return csrow;
}
/*
* Iterate over the DRAM DCT "base" and "mask" registers looking for a
* SystemAddr match on the specified 'ChannelSelect' and 'NodeID'
*
* Return:
* -EINVAL: NOT FOUND
* 0..csrow = Chip-Select Row
*/
static int f10_lookup_addr_in_dct(u64 in_addr, u32 nid, u8 dct)
{
struct mem_ctl_info *mci;
struct amd64_pvt *pvt;
u64 cs_base, cs_mask;
int cs_found = -EINVAL;
int csrow;
mci = mcis[nid];
if (!mci)
return cs_found;
pvt = mci->pvt_info;
debugf1("input addr: 0x%llx, DCT: %d\n", in_addr, dct);
for_each_chip_select(csrow, dct, pvt) {
if (!csrow_enabled(csrow, dct, pvt))
continue;
get_cs_base_and_mask(pvt, csrow, dct, &cs_base, &cs_mask);
debugf1(" CSROW=%d CSBase=0x%llx CSMask=0x%llx\n",
csrow, cs_base, cs_mask);
cs_mask = ~cs_mask;
debugf1(" (InputAddr & ~CSMask)=0x%llx "
"(CSBase & ~CSMask)=0x%llx\n",
(in_addr & cs_mask), (cs_base & cs_mask));
if ((in_addr & cs_mask) == (cs_base & cs_mask)) {
cs_found = f10_process_possible_spare(pvt, dct, csrow);
debugf1(" MATCH csrow=%d\n", cs_found);
break;
}
}
return cs_found;
}
/* For a given @dram_range, check if @sys_addr falls within it. */
static int f10_match_to_this_node(struct amd64_pvt *pvt, int range,
u64 sys_addr, int *nid, int *chan_sel)
{
int cs_found = -EINVAL, high_range = 0;
u64 chan_addr, dct_sel_base_off;
u64 hole_off;
u32 hole_valid, tmp, dct_sel_base;
u32 intlv_shift;
u8 channel;
u8 node_id = dram_dst_node(pvt, range);
u32 intlv_en = dram_intlv_en(pvt, range);
u32 intlv_sel = dram_intlv_sel(pvt, range);
u64 dram_base = get_dram_base(pvt, range);
debugf1("(range %d) Base=0x%llx SystemAddr= 0x%llx Limit=0x%llx\n",
range, dram_base, sys_addr, get_dram_limit(pvt, range));
/*
* This assumes that one node's DHAR is the same as all the other
* nodes' DHAR.
*/
hole_off = f10_dhar_offset(pvt);
hole_valid = (pvt->dhar & DHAR_VALID);
dct_sel_base_off = (pvt->dct_sel_hi & 0xFFFFFC00) << 16;
debugf1(" HoleOffset=0x%016llx HoleValid=%d IntlvSel=0x%x\n",
hole_off, hole_valid, intlv_sel);
if (intlv_en &&
(intlv_sel != ((sys_addr >> 12) & intlv_en)))
return -EINVAL;
dct_sel_base = dct_sel_baseaddr(pvt);
/*
* check whether addresses >= DctSelBaseAddr[47:27] are to be used to
* select between DCT0 and DCT1.
*/
if (dct_high_range_enabled(pvt) &&
!dct_ganging_enabled(pvt) &&
((sys_addr >> 27) >= (dct_sel_base >> 11)))
high_range = 1;
channel = f10_determine_channel(pvt, sys_addr, high_range, intlv_en);
chan_addr = f10_get_base_addr_offset(sys_addr, high_range, dct_sel_base,
dct_sel_base_off, hole_valid,
hole_off, dram_base);
intlv_shift = f10_map_intlv_en_to_shift(intlv_en);
/* remove Node ID (in case of memory interleaving) */
tmp = chan_addr & 0xFC0;
chan_addr = ((chan_addr >> intlv_shift) & 0xFFFFFFFFF000ULL) | tmp;
/* remove channel interleave and hash */
if (dct_interleave_enabled(pvt) &&
!dct_high_range_enabled(pvt) &&
!dct_ganging_enabled(pvt)) {
if (dct_sel_interleave_addr(pvt) != 1)
chan_addr = (chan_addr >> 1) & 0xFFFFFFFFFFFFFFC0ULL;
else {
tmp = chan_addr & 0xFC0;
chan_addr = ((chan_addr & 0xFFFFFFFFFFFFC000ULL) >> 1)
| tmp;
}
}
debugf1(" (ChannelAddrLong=0x%llx)\n", chan_addr);
cs_found = f10_lookup_addr_in_dct(chan_addr, node_id, channel);
if (cs_found >= 0) {
*nid = node_id;
*chan_sel = channel;
}
return cs_found;
}
static int f10_translate_sysaddr_to_cs(struct amd64_pvt *pvt, u64 sys_addr,
int *node, int *chan_sel)
{
int range, cs_found = -EINVAL;
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)) {
cs_found = f10_match_to_this_node(pvt, range,
sys_addr, node,
chan_sel);
if (cs_found >= 0)
break;
}
}
return cs_found;
}
/*
* For reference see "2.8.5 Routing DRAM Requests" in F10 BKDG. This code maps
* a @sys_addr to NodeID, DCT (channel) and chip select (CSROW).
*
* The @sys_addr is usually an error address received from the hardware
* (MCX_ADDR).
*/
static void f10_map_sysaddr_to_csrow(struct mem_ctl_info *mci,
struct err_regs *err_info,
u64 sys_addr)
{
struct amd64_pvt *pvt = mci->pvt_info;
u32 page, offset;
int nid, csrow, chan = 0;
u16 syndrome;
csrow = f10_translate_sysaddr_to_cs(pvt, sys_addr, &nid, &chan);
if (csrow < 0) {
edac_mc_handle_ce_no_info(mci, EDAC_MOD_STR);
return;
}
error_address_to_page_and_offset(sys_addr, &page, &offset);
syndrome = extract_syndrome(err_info);
/*
* We need the syndromes for channel detection only when we're
* ganged. Otherwise @chan should already contain the channel at
* this point.
*/
if (dct_ganging_enabled(pvt) && (pvt->nbcfg & K8_NBCFG_CHIPKILL))
chan = get_channel_from_ecc_syndrome(mci, syndrome);
if (chan >= 0)
edac_mc_handle_ce(mci, page, offset, syndrome, csrow, chan,
EDAC_MOD_STR);
else
/*
* Channel unknown, report all channels on this CSROW as failed.
*/
for (chan = 0; chan < mci->csrows[csrow].nr_channels; chan++)
edac_mc_handle_ce(mci, page, offset, syndrome,
csrow, chan, EDAC_MOD_STR);
}
/*
* debug routine to display the memory sizes of all logical DIMMs and its
* CSROWs as well
*/
static void amd64_debug_display_dimm_sizes(int ctrl, struct amd64_pvt *pvt)
{
int dimm, size0, size1, factor = 0;
u32 dbam;
u32 *dcsb;
if (boot_cpu_data.x86 == 0xf) {
if (pvt->dclr0 & F10_WIDTH_128)
factor = 1;
/* K8 families < revF not supported yet */
if (pvt->ext_model < K8_REV_F)
return;
else
WARN_ON(ctrl != 0);
}
dbam = (ctrl && !dct_ganging_enabled(pvt)) ? pvt->dbam1 : pvt->dbam0;
dcsb = (ctrl && !dct_ganging_enabled(pvt)) ? pvt->csels[1].csbases
: pvt->csels[0].csbases;
debugf1("F2x%d80 (DRAM Bank Address Mapping): 0x%08x\n", ctrl, dbam);
edac_printk(KERN_DEBUG, EDAC_MC, "DCT%d chip selects:\n", ctrl);
/* Dump memory sizes for DIMM and its CSROWs */
for (dimm = 0; dimm < 4; dimm++) {
size0 = 0;
if (dcsb[dimm*2] & DCSB_CS_ENABLE)
size0 = pvt->ops->dbam_to_cs(pvt, DBAM_DIMM(dimm, dbam));
size1 = 0;
if (dcsb[dimm*2 + 1] & DCSB_CS_ENABLE)
size1 = pvt->ops->dbam_to_cs(pvt, DBAM_DIMM(dimm, dbam));
amd64_info(EDAC_MC ": %d: %5dMB %d: %5dMB\n",
dimm * 2, size0 << factor,
dimm * 2 + 1, size1 << factor);
}
}
static struct amd64_family_type amd64_family_types[] = {
[K8_CPUS] = {
.ctl_name = "K8",
.f1_id = PCI_DEVICE_ID_AMD_K8_NB_ADDRMAP,
.f3_id = PCI_DEVICE_ID_AMD_K8_NB_MISC,
.ops = {
.early_channel_count = k8_early_channel_count,
.get_error_address = k8_get_error_address,
.map_sysaddr_to_csrow = k8_map_sysaddr_to_csrow,
.dbam_to_cs = k8_dbam_to_chip_select,
.read_dct_pci_cfg = k8_read_dct_pci_cfg,
}
},
[F10_CPUS] = {
.ctl_name = "F10h",
.f1_id = PCI_DEVICE_ID_AMD_10H_NB_MAP,
.f3_id = PCI_DEVICE_ID_AMD_10H_NB_MISC,
.ops = {
.early_channel_count = f10_early_channel_count,
.get_error_address = f10_get_error_address,
.read_dram_ctl_register = f10_read_dram_ctl_register,
.map_sysaddr_to_csrow = f10_map_sysaddr_to_csrow,
.dbam_to_cs = f10_dbam_to_chip_select,
.read_dct_pci_cfg = f10_read_dct_pci_cfg,
}
},
[F15_CPUS] = {
.ctl_name = "F15h",
.ops = {
.read_dct_pci_cfg = f15_read_dct_pci_cfg,
}
},
};
static struct pci_dev *pci_get_related_function(unsigned int vendor,
unsigned int device,
struct pci_dev *related)
{
struct pci_dev *dev = NULL;
dev = pci_get_device(vendor, device, dev);
while (dev) {
if ((dev->bus->number == related->bus->number) &&
(PCI_SLOT(dev->devfn) == PCI_SLOT(related->devfn)))
break;
dev = pci_get_device(vendor, device, dev);
}
return dev;
}
/*
* These are tables of eigenvectors (one per line) which can be used for the
* construction of the syndrome tables. The modified syndrome search algorithm
* uses those to find the symbol in error and thus the DIMM.
*
* Algorithm courtesy of Ross LaFetra from AMD.
*/
static u16 x4_vectors[] = {
0x2f57, 0x1afe, 0x66cc, 0xdd88,
0x11eb, 0x3396, 0x7f4c, 0xeac8,
0x0001, 0x0002, 0x0004, 0x0008,
0x1013, 0x3032, 0x4044, 0x8088,
0x106b, 0x30d6, 0x70fc, 0xe0a8,
0x4857, 0xc4fe, 0x13cc, 0x3288,
0x1ac5, 0x2f4a, 0x5394, 0xa1e8,
0x1f39, 0x251e, 0xbd6c, 0x6bd8,
0x15c1, 0x2a42, 0x89ac, 0x4758,
0x2b03, 0x1602, 0x4f0c, 0xca08,
0x1f07, 0x3a0e, 0x6b04, 0xbd08,
0x8ba7, 0x465e, 0x244c, 0x1cc8,
0x2b87, 0x164e, 0x642c, 0xdc18,
0x40b9, 0x80de, 0x1094, 0x20e8,
0x27db, 0x1eb6, 0x9dac, 0x7b58,
0x11c1, 0x2242, 0x84ac, 0x4c58,
0x1be5, 0x2d7a, 0x5e34, 0xa718,
0x4b39, 0x8d1e, 0x14b4, 0x28d8,
0x4c97, 0xc87e, 0x11fc, 0x33a8,
0x8e97, 0x497e, 0x2ffc, 0x1aa8,
0x16b3, 0x3d62, 0x4f34, 0x8518,
0x1e2f, 0x391a, 0x5cac, 0xf858,
0x1d9f, 0x3b7a, 0x572c, 0xfe18,
0x15f5, 0x2a5a, 0x5264, 0xa3b8,
0x1dbb, 0x3b66, 0x715c, 0xe3f8,
0x4397, 0xc27e, 0x17fc, 0x3ea8,
0x1617, 0x3d3e, 0x6464, 0xb8b8,
0x23ff, 0x12aa, 0xab6c, 0x56d8,
0x2dfb, 0x1ba6, 0x913c, 0x7328,
0x185d, 0x2ca6, 0x7914, 0x9e28,
0x171b, 0x3e36, 0x7d7c, 0xebe8,
0x4199, 0x82ee, 0x19f4, 0x2e58,
0x4807, 0xc40e, 0x130c, 0x3208,
0x1905, 0x2e0a, 0x5804, 0xac08,
0x213f, 0x132a, 0xadfc, 0x5ba8,
0x19a9, 0x2efe, 0xb5cc, 0x6f88,
};
static u16 x8_vectors[] = {
0x0145, 0x028a, 0x2374, 0x43c8, 0xa1f0, 0x0520, 0x0a40, 0x1480,
0x0211, 0x0422, 0x0844, 0x1088, 0x01b0, 0x44e0, 0x23c0, 0xed80,
0x1011, 0x0116, 0x022c, 0x0458, 0x08b0, 0x8c60, 0x2740, 0x4e80,
0x0411, 0x0822, 0x1044, 0x0158, 0x02b0, 0x2360, 0x46c0, 0xab80,
0x0811, 0x1022, 0x012c, 0x0258, 0x04b0, 0x4660, 0x8cc0, 0x2780,
0x2071, 0x40e2, 0xa0c4, 0x0108, 0x0210, 0x0420, 0x0840, 0x1080,
0x4071, 0x80e2, 0x0104, 0x0208, 0x0410, 0x0820, 0x1040, 0x2080,
0x8071, 0x0102, 0x0204, 0x0408, 0x0810, 0x1020, 0x2040, 0x4080,
0x019d, 0x03d6, 0x136c, 0x2198, 0x50b0, 0xb2e0, 0x0740, 0x0e80,
0x0189, 0x03ea, 0x072c, 0x0e58, 0x1cb0, 0x56e0, 0x37c0, 0xf580,
0x01fd, 0x0376, 0x06ec, 0x0bb8, 0x1110, 0x2220, 0x4440, 0x8880,
0x0163, 0x02c6, 0x1104, 0x0758, 0x0eb0, 0x2be0, 0x6140, 0xc280,
0x02fd, 0x01c6, 0x0b5c, 0x1108, 0x07b0, 0x25a0, 0x8840, 0x6180,
0x0801, 0x012e, 0x025c, 0x04b8, 0x1370, 0x26e0, 0x57c0, 0xb580,
0x0401, 0x0802, 0x015c, 0x02b8, 0x22b0, 0x13e0, 0x7140, 0xe280,
0x0201, 0x0402, 0x0804, 0x01b8, 0x11b0, 0x31a0, 0x8040, 0x7180,
0x0101, 0x0202, 0x0404, 0x0808, 0x1010, 0x2020, 0x4040, 0x8080,
0x0001, 0x0002, 0x0004, 0x0008, 0x0010, 0x0020, 0x0040, 0x0080,
0x0100, 0x0200, 0x0400, 0x0800, 0x1000, 0x2000, 0x4000, 0x8000,
};
static int decode_syndrome(u16 syndrome, u16 *vectors, int num_vecs,
int v_dim)
{
unsigned int i, err_sym;
for (err_sym = 0; err_sym < num_vecs / v_dim; err_sym++) {
u16 s = syndrome;
int v_idx = err_sym * v_dim;
int v_end = (err_sym + 1) * v_dim;
/* walk over all 16 bits of the syndrome */
for (i = 1; i < (1U << 16); i <<= 1) {
/* if bit is set in that eigenvector... */
if (v_idx < v_end && vectors[v_idx] & i) {
u16 ev_comp = vectors[v_idx++];
/* ... and bit set in the modified syndrome, */
if (s & i) {
/* remove it. */
s ^= ev_comp;
if (!s)
return err_sym;
}
} else if (s & i)
/* can't get to zero, move to next symbol */
break;
}
}
debugf0("syndrome(%x) not found\n", syndrome);
return -1;
}
static int map_err_sym_to_channel(int err_sym, int sym_size)
{
if (sym_size == 4)
switch (err_sym) {
case 0x20:
case 0x21:
return 0;
break;
case 0x22:
case 0x23:
return 1;
break;
default:
return err_sym >> 4;
break;
}
/* x8 symbols */
else
switch (err_sym) {
/* imaginary bits not in a DIMM */
case 0x10:
WARN(1, KERN_ERR "Invalid error symbol: 0x%x\n",
err_sym);
return -1;
break;
case 0x11:
return 0;
break;
case 0x12:
return 1;
break;
default:
return err_sym >> 3;
break;
}
return -1;
}
static int get_channel_from_ecc_syndrome(struct mem_ctl_info *mci, u16 syndrome)
{
struct amd64_pvt *pvt = mci->pvt_info;
int err_sym = -1;
if (pvt->syn_type == 8)
err_sym = decode_syndrome(syndrome, x8_vectors,
ARRAY_SIZE(x8_vectors),
pvt->syn_type);
else if (pvt->syn_type == 4)
err_sym = decode_syndrome(syndrome, x4_vectors,
ARRAY_SIZE(x4_vectors),
pvt->syn_type);
else {
amd64_warn("Illegal syndrome type: %u\n", pvt->syn_type);
return err_sym;
}
return map_err_sym_to_channel(err_sym, pvt->syn_type);
}
/*
* Handle any Correctable Errors (CEs) that have occurred. Check for valid ERROR
* ADDRESS and process.
*/
static void amd64_handle_ce(struct mem_ctl_info *mci,
struct err_regs *info)
{
struct amd64_pvt *pvt = mci->pvt_info;
u64 sys_addr;
/* Ensure that the Error Address is VALID */
if (!(info->nbsh & K8_NBSH_VALID_ERROR_ADDR)) {
amd64_mc_err(mci, "HW has no ERROR_ADDRESS available\n");
edac_mc_handle_ce_no_info(mci, EDAC_MOD_STR);
return;
}
sys_addr = pvt->ops->get_error_address(mci, info);
amd64_mc_err(mci, "CE ERROR_ADDRESS= 0x%llx\n", sys_addr);
pvt->ops->map_sysaddr_to_csrow(mci, info, sys_addr);
}
/* Handle any Un-correctable Errors (UEs) */
static void amd64_handle_ue(struct mem_ctl_info *mci,
struct err_regs *info)
{
struct amd64_pvt *pvt = mci->pvt_info;
struct mem_ctl_info *log_mci, *src_mci = NULL;
int csrow;
u64 sys_addr;
u32 page, offset;
log_mci = mci;
if (!(info->nbsh & K8_NBSH_VALID_ERROR_ADDR)) {
amd64_mc_err(mci, "HW has no ERROR_ADDRESS available\n");
edac_mc_handle_ue_no_info(log_mci, EDAC_MOD_STR);
return;
}
sys_addr = pvt->ops->get_error_address(mci, info);
/*
* Find out which node the error address belongs to. This may be
* different from the node that detected the error.
*/
src_mci = find_mc_by_sys_addr(mci, sys_addr);
if (!src_mci) {
amd64_mc_err(mci, "ERROR ADDRESS (0x%lx) NOT mapped to a MC\n",
(unsigned long)sys_addr);
edac_mc_handle_ue_no_info(log_mci, EDAC_MOD_STR);
return;
}
log_mci = src_mci;
csrow = sys_addr_to_csrow(log_mci, sys_addr);
if (csrow < 0) {
amd64_mc_err(mci, "ERROR_ADDRESS (0x%lx) NOT mapped to CS\n",
(unsigned long)sys_addr);
edac_mc_handle_ue_no_info(log_mci, EDAC_MOD_STR);
} else {
error_address_to_page_and_offset(sys_addr, &page, &offset);
edac_mc_handle_ue(log_mci, page, offset, csrow, EDAC_MOD_STR);
}
}
static inline void __amd64_decode_bus_error(struct mem_ctl_info *mci,
struct err_regs *info)
{
u16 ec = EC(info->nbsl);
u8 xec = XEC(info->nbsl, 0x1f);
int ecc_type = (info->nbsh >> 13) & 0x3;
/* Bail early out if this was an 'observed' error */
if (PP(ec) == K8_NBSL_PP_OBS)
return;
/* Do only ECC errors */
if (xec && xec != F10_NBSL_EXT_ERR_ECC)
return;
if (ecc_type == 2)
amd64_handle_ce(mci, info);
else if (ecc_type == 1)
amd64_handle_ue(mci, info);
}
void amd64_decode_bus_error(int node_id, struct mce *m, u32 nbcfg)
{
struct mem_ctl_info *mci = mcis[node_id];
struct err_regs regs;
regs.nbsl = (u32) m->status;
regs.nbsh = (u32)(m->status >> 32);
regs.nbeal = (u32) m->addr;
regs.nbeah = (u32)(m->addr >> 32);
regs.nbcfg = nbcfg;
__amd64_decode_bus_error(mci, &regs);
/*
* Check the UE bit of the NB status high register, if set generate some
* logs. If NOT a GART error, then process the event as a NO-INFO event.
* If it was a GART error, skip that process.
*
* FIXME: this should go somewhere else, if at all.
*/
if (regs.nbsh & K8_NBSH_UC_ERR && !report_gart_errors)
edac_mc_handle_ue_no_info(mci, "UE bit is set");
}
/*
* Use pvt->F2 which contains the F2 CPU PCI device to get the related
* F1 (AddrMap) and F3 (Misc) devices. Return negative value on error.
*/
static int reserve_mc_sibling_devs(struct amd64_pvt *pvt, u16 f1_id, u16 f3_id)
{
/* Reserve the ADDRESS MAP Device */
pvt->F1 = pci_get_related_function(pvt->F2->vendor, f1_id, pvt->F2);
if (!pvt->F1) {
amd64_err("error address map device not found: "
"vendor %x device 0x%x (broken BIOS?)\n",
PCI_VENDOR_ID_AMD, f1_id);
return -ENODEV;
}
/* Reserve the MISC Device */
pvt->F3 = pci_get_related_function(pvt->F2->vendor, f3_id, pvt->F2);
if (!pvt->F3) {
pci_dev_put(pvt->F1);
pvt->F1 = NULL;
amd64_err("error F3 device not found: "
"vendor %x device 0x%x (broken BIOS?)\n",
PCI_VENDOR_ID_AMD, f3_id);
return -ENODEV;
}
debugf1("F1: %s\n", pci_name(pvt->F1));
debugf1("F2: %s\n", pci_name(pvt->F2));
debugf1("F3: %s\n", pci_name(pvt->F3));
return 0;
}
static void free_mc_sibling_devs(struct amd64_pvt *pvt)
{
pci_dev_put(pvt->F1);
pci_dev_put(pvt->F3);
}
/*
* Retrieve the hardware registers of the memory controller (this includes the
* 'Address Map' and 'Misc' device regs)
*/
static void read_mc_regs(struct amd64_pvt *pvt)
{
u64 msr_val;
u32 tmp;
int range;
/*
* Retrieve TOP_MEM and TOP_MEM2; no masking off of reserved bits since
* those are Read-As-Zero
*/
rdmsrl(MSR_K8_TOP_MEM1, pvt->top_mem);
debugf0(" TOP_MEM: 0x%016llx\n", pvt->top_mem);
/* check first whether TOP_MEM2 is enabled */
rdmsrl(MSR_K8_SYSCFG, msr_val);
if (msr_val & (1U << 21)) {
rdmsrl(MSR_K8_TOP_MEM2, pvt->top_mem2);
debugf0(" TOP_MEM2: 0x%016llx\n", pvt->top_mem2);
} else
debugf0(" TOP_MEM2 disabled.\n");
amd64_read_pci_cfg(pvt->F3, K8_NBCAP, &pvt->nbcap);
if (pvt->ops->read_dram_ctl_register)
pvt->ops->read_dram_ctl_register(pvt);
for (range = 0; range < DRAM_RANGES; range++) {
u8 rw;
/* read settings for this DRAM range */
read_dram_base_limit_regs(pvt, range);
rw = dram_rw(pvt, range);
if (!rw)
continue;
debugf1(" DRAM range[%d], base: 0x%016llx; limit: 0x%016llx\n",
range,
get_dram_base(pvt, range),
get_dram_limit(pvt, range));
debugf1(" IntlvEn=%s; Range access: %s%s IntlvSel=%d DstNode=%d\n",
dram_intlv_en(pvt, range) ? "Enabled" : "Disabled",
(rw & 0x1) ? "R" : "-",
(rw & 0x2) ? "W" : "-",
dram_intlv_sel(pvt, range),
dram_dst_node(pvt, range));
}
read_dct_base_mask(pvt);
amd64_read_pci_cfg(pvt->F1, DHAR, &pvt->dhar);
amd64_read_dbam_reg(pvt);
amd64_read_pci_cfg(pvt->F3, F10_ONLINE_SPARE, &pvt->online_spare);
amd64_read_dct_pci_cfg(pvt, F10_DCLR_0, &pvt->dclr0);
amd64_read_dct_pci_cfg(pvt, F10_DCHR_0, &pvt->dchr0);
if (!dct_ganging_enabled(pvt)) {
amd64_read_dct_pci_cfg(pvt, F10_DCLR_1, &pvt->dclr1);
amd64_read_dct_pci_cfg(pvt, F10_DCHR_1, &pvt->dchr1);
}
if (boot_cpu_data.x86 >= 0x10)
amd64_read_pci_cfg(pvt->F3, EXT_NB_MCA_CFG, &tmp);
if (boot_cpu_data.x86 == 0x10 &&
boot_cpu_data.x86_model > 7 &&
/* F3x180[EccSymbolSize]=1 => x8 symbols */
tmp & BIT(25))
pvt->syn_type = 8;
else
pvt->syn_type = 4;
dump_misc_regs(pvt);
}
/*
* NOTE: CPU Revision Dependent code
*
* Input:
* @csrow_nr ChipSelect Row Number (0..NUM_CHIPSELECTS-1)
* k8 private pointer to -->
* DRAM Bank Address mapping register
* node_id
* DCL register where dual_channel_active is
*
* The DBAM register consists of 4 sets of 4 bits each definitions:
*
* Bits: CSROWs
* 0-3 CSROWs 0 and 1
* 4-7 CSROWs 2 and 3
* 8-11 CSROWs 4 and 5
* 12-15 CSROWs 6 and 7
*
* Values range from: 0 to 15
* The meaning of the values depends on CPU revision and dual-channel state,
* see relevant BKDG more info.
*
* The memory controller provides for total of only 8 CSROWs in its current
* architecture. Each "pair" of CSROWs normally represents just one DIMM in
* single channel or two (2) DIMMs in dual channel mode.
*
* The following code logic collapses the various tables for CSROW based on CPU
* revision.
*
* Returns:
* The number of PAGE_SIZE pages on the specified CSROW number it
* encompasses
*
*/
static u32 amd64_csrow_nr_pages(int csrow_nr, struct amd64_pvt *pvt)
{
u32 cs_mode, nr_pages;
/*
* The math on this doesn't look right on the surface because x/2*4 can
* be simplified to x*2 but this expression makes use of the fact that
* it is integral math where 1/2=0. This intermediate value becomes the
* number of bits to shift the DBAM register to extract the proper CSROW
* field.
*/
cs_mode = (pvt->dbam0 >> ((csrow_nr / 2) * 4)) & 0xF;
nr_pages = pvt->ops->dbam_to_cs(pvt, cs_mode) << (20 - PAGE_SHIFT);
/*
* If dual channel then double the memory size of single channel.
* Channel count is 1 or 2
*/
nr_pages <<= (pvt->channel_count - 1);
debugf0(" (csrow=%d) DBAM map index= %d\n", csrow_nr, cs_mode);
debugf0(" nr_pages= %u channel-count = %d\n",
nr_pages, pvt->channel_count);
return nr_pages;
}
/*
* Initialize the array of csrow attribute instances, based on the values
* from pci config hardware registers.
*/
static int init_csrows(struct mem_ctl_info *mci)
{
struct csrow_info *csrow;
struct amd64_pvt *pvt = mci->pvt_info;
u64 input_addr_min, input_addr_max, sys_addr, base, mask;
u32 val;
int i, empty = 1;
amd64_read_pci_cfg(pvt->F3, K8_NBCFG, &val);
pvt->nbcfg = val;
pvt->ctl_error_info.nbcfg = val;
debugf0("node %d, NBCFG=0x%08x[ChipKillEccCap: %d|DramEccEn: %d]\n",
pvt->mc_node_id, val,
!!(val & K8_NBCFG_CHIPKILL), !!(val & K8_NBCFG_ECC_ENABLE));
for_each_chip_select(i, 0, pvt) {
csrow = &mci->csrows[i];
if (!csrow_enabled(i, 0, pvt)) {
debugf1("----CSROW %d EMPTY for node %d\n", i,
pvt->mc_node_id);
continue;
}
debugf1("----CSROW %d VALID for MC node %d\n",
i, pvt->mc_node_id);
empty = 0;
csrow->nr_pages = amd64_csrow_nr_pages(i, pvt);
find_csrow_limits(mci, i, &input_addr_min, &input_addr_max);
sys_addr = input_addr_to_sys_addr(mci, input_addr_min);
csrow->first_page = (u32) (sys_addr >> PAGE_SHIFT);
sys_addr = input_addr_to_sys_addr(mci, input_addr_max);
csrow->last_page = (u32) (sys_addr >> PAGE_SHIFT);
get_cs_base_and_mask(pvt, i, 0, &base, &mask);
csrow->page_mask = ~mask;
/* 8 bytes of resolution */
csrow->mtype = amd64_determine_memory_type(pvt, i);
debugf1(" for MC node %d csrow %d:\n", pvt->mc_node_id, i);
debugf1(" input_addr_min: 0x%lx input_addr_max: 0x%lx\n",
(unsigned long)input_addr_min,
(unsigned long)input_addr_max);
debugf1(" sys_addr: 0x%lx page_mask: 0x%lx\n",
(unsigned long)sys_addr, csrow->page_mask);
debugf1(" nr_pages: %u first_page: 0x%lx "
"last_page: 0x%lx\n",
(unsigned)csrow->nr_pages,
csrow->first_page, csrow->last_page);
/*
* determine whether CHIPKILL or JUST ECC or NO ECC is operating
*/
if (pvt->nbcfg & K8_NBCFG_ECC_ENABLE)
csrow->edac_mode =
(pvt->nbcfg & K8_NBCFG_CHIPKILL) ?
EDAC_S4ECD4ED : EDAC_SECDED;
else
csrow->edac_mode = EDAC_NONE;
}
return empty;
}
/* get all cores on this DCT */
static void get_cpus_on_this_dct_cpumask(struct cpumask *mask, int nid)
{
int cpu;
for_each_online_cpu(cpu)
if (amd_get_nb_id(cpu) == nid)
cpumask_set_cpu(cpu, mask);
}
/* check MCG_CTL on all the cpus on this node */
static bool amd64_nb_mce_bank_enabled_on_node(int nid)
{
cpumask_var_t mask;
int cpu, nbe;
bool ret = false;
if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) {
amd64_warn("%s: Error allocating mask\n", __func__);
return false;
}
get_cpus_on_this_dct_cpumask(mask, nid);
rdmsr_on_cpus(mask, MSR_IA32_MCG_CTL, msrs);
for_each_cpu(cpu, mask) {
struct msr *reg = per_cpu_ptr(msrs, cpu);
nbe = reg->l & K8_MSR_MCGCTL_NBE;
debugf0("core: %u, MCG_CTL: 0x%llx, NB MSR is %s\n",
cpu, reg->q,
(nbe ? "enabled" : "disabled"));
if (!nbe)
goto out;
}
ret = true;
out:
free_cpumask_var(mask);
return ret;
}
static int toggle_ecc_err_reporting(struct ecc_settings *s, u8 nid, bool on)
{
cpumask_var_t cmask;
int cpu;
if (!zalloc_cpumask_var(&cmask, GFP_KERNEL)) {
amd64_warn("%s: error allocating mask\n", __func__);
return false;
}
get_cpus_on_this_dct_cpumask(cmask, nid);
rdmsr_on_cpus(cmask, MSR_IA32_MCG_CTL, msrs);
for_each_cpu(cpu, cmask) {
struct msr *reg = per_cpu_ptr(msrs, cpu);
if (on) {
if (reg->l & K8_MSR_MCGCTL_NBE)
s->flags.nb_mce_enable = 1;
reg->l |= K8_MSR_MCGCTL_NBE;
} else {
/*
* Turn off NB MCE reporting only when it was off before
*/
if (!s->flags.nb_mce_enable)
reg->l &= ~K8_MSR_MCGCTL_NBE;
}
}
wrmsr_on_cpus(cmask, MSR_IA32_MCG_CTL, msrs);
free_cpumask_var(cmask);
return 0;
}
static bool enable_ecc_error_reporting(struct ecc_settings *s, u8 nid,
struct pci_dev *F3)
{
bool ret = true;
u32 value, mask = K8_NBCTL_CECCEn | K8_NBCTL_UECCEn;
if (toggle_ecc_err_reporting(s, nid, ON)) {
amd64_warn("Error enabling ECC reporting over MCGCTL!\n");
return false;
}
amd64_read_pci_cfg(F3, K8_NBCTL, &value);
/* turn on UECCEn and CECCEn bits */
s->old_nbctl = value & mask;
s->nbctl_valid = true;
value |= mask;
amd64_write_pci_cfg(F3, K8_NBCTL, value);
amd64_read_pci_cfg(F3, K8_NBCFG, &value);
debugf0("1: node %d, NBCFG=0x%08x[ChipKillEccCap: %d|DramEccEn: %d]\n",
nid, value,
!!(value & K8_NBCFG_CHIPKILL), !!(value & K8_NBCFG_ECC_ENABLE));
if (!(value & K8_NBCFG_ECC_ENABLE)) {
amd64_warn("DRAM ECC disabled on this node, enabling...\n");
s->flags.nb_ecc_prev = 0;
/* Attempt to turn on DRAM ECC Enable */
value |= K8_NBCFG_ECC_ENABLE;
amd64_write_pci_cfg(F3, K8_NBCFG, value);
amd64_read_pci_cfg(F3, K8_NBCFG, &value);
if (!(value & K8_NBCFG_ECC_ENABLE)) {
amd64_warn("Hardware rejected DRAM ECC enable,"
"check memory DIMM configuration.\n");
ret = false;
} else {
amd64_info("Hardware accepted DRAM ECC Enable\n");
}
} else {
s->flags.nb_ecc_prev = 1;
}
debugf0("2: node %d, NBCFG=0x%08x[ChipKillEccCap: %d|DramEccEn: %d]\n",
nid, value,
!!(value & K8_NBCFG_CHIPKILL), !!(value & K8_NBCFG_ECC_ENABLE));
return ret;
}
static void restore_ecc_error_reporting(struct ecc_settings *s, u8 nid,
struct pci_dev *F3)
{
u32 value, mask = K8_NBCTL_CECCEn | K8_NBCTL_UECCEn;
if (!s->nbctl_valid)
return;
amd64_read_pci_cfg(F3, K8_NBCTL, &value);
value &= ~mask;
value |= s->old_nbctl;
amd64_write_pci_cfg(F3, K8_NBCTL, value);
/* restore previous BIOS DRAM ECC "off" setting we force-enabled */
if (!s->flags.nb_ecc_prev) {
amd64_read_pci_cfg(F3, K8_NBCFG, &value);
value &= ~K8_NBCFG_ECC_ENABLE;
amd64_write_pci_cfg(F3, K8_NBCFG, value);
}
/* restore the NB Enable MCGCTL bit */
if (toggle_ecc_err_reporting(s, nid, OFF))
amd64_warn("Error restoring NB MCGCTL settings!\n");
}
/*
* EDAC requires that the BIOS have ECC enabled before
* taking over the processing of ECC errors. A command line
* option allows to force-enable hardware ECC later in
* enable_ecc_error_reporting().
*/
static const char *ecc_msg =
"ECC disabled in the BIOS or no ECC capability, module will not load.\n"
" Either enable ECC checking or force module loading by setting "
"'ecc_enable_override'.\n"
" (Note that use of the override may cause unknown side effects.)\n";
static bool ecc_enabled(struct pci_dev *F3, u8 nid)
{
u32 value;
u8 ecc_en = 0;
bool nb_mce_en = false;
amd64_read_pci_cfg(F3, K8_NBCFG, &value);
ecc_en = !!(value & K8_NBCFG_ECC_ENABLE);
amd64_info("DRAM ECC %s.\n", (ecc_en ? "enabled" : "disabled"));
nb_mce_en = amd64_nb_mce_bank_enabled_on_node(nid);
if (!nb_mce_en)
amd64_notice("NB MCE bank disabled, set MSR "
"0x%08x[4] on node %d to enable.\n",
MSR_IA32_MCG_CTL, nid);
if (!ecc_en || !nb_mce_en) {
amd64_notice("%s", ecc_msg);
return false;
}
return true;
}
struct mcidev_sysfs_attribute sysfs_attrs[ARRAY_SIZE(amd64_dbg_attrs) +
ARRAY_SIZE(amd64_inj_attrs) +
1];
struct mcidev_sysfs_attribute terminator = { .attr = { .name = NULL } };
static void set_mc_sysfs_attrs(struct mem_ctl_info *mci)
{
unsigned int i = 0, j = 0;
for (; i < ARRAY_SIZE(amd64_dbg_attrs); i++)
sysfs_attrs[i] = amd64_dbg_attrs[i];
if (boot_cpu_data.x86 >= 0x10)
for (j = 0; j < ARRAY_SIZE(amd64_inj_attrs); j++, i++)
sysfs_attrs[i] = amd64_inj_attrs[j];
sysfs_attrs[i] = terminator;
mci->mc_driver_sysfs_attributes = sysfs_attrs;
}
static void setup_mci_misc_attrs(struct mem_ctl_info *mci)
{
struct amd64_pvt *pvt = mci->pvt_info;
mci->mtype_cap = MEM_FLAG_DDR2 | MEM_FLAG_RDDR2;
mci->edac_ctl_cap = EDAC_FLAG_NONE;
if (pvt->nbcap & K8_NBCAP_SECDED)
mci->edac_ctl_cap |= EDAC_FLAG_SECDED;
if (pvt->nbcap & K8_NBCAP_CHIPKILL)
mci->edac_ctl_cap |= EDAC_FLAG_S4ECD4ED;
mci->edac_cap = amd64_determine_edac_cap(pvt);
mci->mod_name = EDAC_MOD_STR;
mci->mod_ver = EDAC_AMD64_VERSION;
mci->ctl_name = pvt->ctl_name;
mci->dev_name = pci_name(pvt->F2);
mci->ctl_page_to_phys = NULL;
/* memory scrubber interface */
mci->set_sdram_scrub_rate = amd64_set_scrub_rate;
mci->get_sdram_scrub_rate = amd64_get_scrub_rate;
}
/*
* returns a pointer to the family descriptor on success, NULL otherwise.
*/
static struct amd64_family_type *amd64_per_family_init(struct amd64_pvt *pvt)
{
u8 fam = boot_cpu_data.x86;
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->ctl_name = fam_type->ctl_name;
pvt->min_scrubrate = K8_MIN_SCRUB_RATE_BITS;
break;
case 0x10:
fam_type = &amd64_family_types[F10_CPUS];
pvt->ops = &amd64_family_types[F10_CPUS].ops;
pvt->ctl_name = fam_type->ctl_name;
pvt->min_scrubrate = F10_MIN_SCRUB_RATE_BITS;
break;
default:
amd64_err("Unsupported family!\n");
return NULL;
}
pvt->ext_model = boot_cpu_data.x86_model >> 4;
amd64_info("%s %sdetected (node %d).\n", pvt->ctl_name,
(fam == 0xf ?
(pvt->ext_model >= K8_REV_F ? "revF or later "
: "revE or earlier ")
: ""), pvt->mc_node_id);
return fam_type;
}
static int amd64_init_one_instance(struct pci_dev *F2)
{
struct amd64_pvt *pvt = NULL;
struct amd64_family_type *fam_type = NULL;
struct mem_ctl_info *mci = NULL;
int err = 0, ret;
u8 nid = get_node_id(F2);
ret = -ENOMEM;
pvt = kzalloc(sizeof(struct amd64_pvt), GFP_KERNEL);
if (!pvt)
goto err_ret;
pvt->mc_node_id = nid;
pvt->F2 = F2;
ret = -EINVAL;
fam_type = amd64_per_family_init(pvt);
if (!fam_type)
goto err_free;
ret = -ENODEV;
err = reserve_mc_sibling_devs(pvt, fam_type->f1_id, fam_type->f3_id);
if (err)
goto err_free;
read_mc_regs(pvt);
/*
* We need to determine how many memory channels there are. Then use
* that information for calculating the size of the dynamic instance
* tables in the 'mci' structure.
*/
ret = -EINVAL;
pvt->channel_count = pvt->ops->early_channel_count(pvt);
if (pvt->channel_count < 0)
goto err_siblings;
ret = -ENOMEM;
mci = edac_mc_alloc(0, pvt->csels[0].b_cnt, pvt->channel_count, nid);
if (!mci)
goto err_siblings;
mci->pvt_info = pvt;
mci->dev = &pvt->F2->dev;
setup_mci_misc_attrs(mci);
if (init_csrows(mci))
mci->edac_cap = EDAC_FLAG_NONE;
set_mc_sysfs_attrs(mci);
ret = -ENODEV;
if (edac_mc_add_mc(mci)) {
debugf1("failed edac_mc_add_mc()\n");
goto err_add_mc;
}
/* register stuff with EDAC MCE */
if (report_gart_errors)
amd_report_gart_errors(true);
amd_register_ecc_decoder(amd64_decode_bus_error);
mcis[nid] = mci;
atomic_inc(&drv_instances);
return 0;
err_add_mc:
edac_mc_free(mci);
err_siblings:
free_mc_sibling_devs(pvt);
err_free:
kfree(pvt);
err_ret:
return ret;
}
static int __devinit amd64_probe_one_instance(struct pci_dev *pdev,
const struct pci_device_id *mc_type)
{
u8 nid = get_node_id(pdev);
struct pci_dev *F3 = node_to_amd_nb(nid)->misc;
struct ecc_settings *s;
int ret = 0;
ret = pci_enable_device(pdev);
if (ret < 0) {
debugf0("ret=%d\n", ret);
return -EIO;
}
ret = -ENOMEM;
s = kzalloc(sizeof(struct ecc_settings), GFP_KERNEL);
if (!s)
goto err_out;
ecc_stngs[nid] = s;
if (!ecc_enabled(F3, nid)) {
ret = -ENODEV;
if (!ecc_enable_override)
goto err_enable;
amd64_warn("Forcing ECC on!\n");
if (!enable_ecc_error_reporting(s, nid, F3))
goto err_enable;
}
ret = amd64_init_one_instance(pdev);
if (ret < 0) {
amd64_err("Error probing instance: %d\n", nid);
restore_ecc_error_reporting(s, nid, F3);
}
return ret;
err_enable:
kfree(s);
ecc_stngs[nid] = NULL;
err_out:
return ret;
}
static void __devexit amd64_remove_one_instance(struct pci_dev *pdev)
{
struct mem_ctl_info *mci;
struct amd64_pvt *pvt;
u8 nid = get_node_id(pdev);
struct pci_dev *F3 = node_to_amd_nb(nid)->misc;
struct ecc_settings *s = ecc_stngs[nid];
/* Remove from EDAC CORE tracking list */
mci = edac_mc_del_mc(&pdev->dev);
if (!mci)
return;
pvt = mci->pvt_info;
restore_ecc_error_reporting(s, nid, F3);
free_mc_sibling_devs(pvt);
/* unregister from EDAC MCE */
amd_report_gart_errors(false);
amd_unregister_ecc_decoder(amd64_decode_bus_error);
kfree(ecc_stngs[nid]);
ecc_stngs[nid] = NULL;
/* Free the EDAC CORE resources */
mci->pvt_info = NULL;
mcis[nid] = NULL;
kfree(pvt);
edac_mc_free(mci);
}
/*
* This table is part of the interface for loading drivers for PCI devices. The
* PCI core identifies what devices are on a system during boot, and then
* inquiry this table to see if this driver is for a given device found.
*/
static const struct pci_device_id amd64_pci_table[] __devinitdata = {
{
.vendor = PCI_VENDOR_ID_AMD,
.device = PCI_DEVICE_ID_AMD_K8_NB_MEMCTL,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.class = 0,
.class_mask = 0,
},
{
.vendor = PCI_VENDOR_ID_AMD,
.device = PCI_DEVICE_ID_AMD_10H_NB_DRAM,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.class = 0,
.class_mask = 0,
},
{0, }
};
MODULE_DEVICE_TABLE(pci, amd64_pci_table);
static struct pci_driver amd64_pci_driver = {
.name = EDAC_MOD_STR,
.probe = amd64_probe_one_instance,
.remove = __devexit_p(amd64_remove_one_instance),
.id_table = amd64_pci_table,
};
static void setup_pci_device(void)
{
struct mem_ctl_info *mci;
struct amd64_pvt *pvt;
if (amd64_ctl_pci)
return;
mci = mcis[0];
if (mci) {
pvt = mci->pvt_info;
amd64_ctl_pci =
edac_pci_create_generic_ctl(&pvt->F2->dev, EDAC_MOD_STR);
if (!amd64_ctl_pci) {
pr_warning("%s(): Unable to create PCI control\n",
__func__);
pr_warning("%s(): PCI error report via EDAC not set\n",
__func__);
}
}
}
static int __init amd64_edac_init(void)
{
int err = -ENODEV;
edac_printk(KERN_INFO, EDAC_MOD_STR, EDAC_AMD64_VERSION "\n");
opstate_init();
if (amd_cache_northbridges() < 0)
goto err_ret;
err = -ENOMEM;
mcis = kzalloc(amd_nb_num() * sizeof(mcis[0]), GFP_KERNEL);
ecc_stngs = kzalloc(amd_nb_num() * sizeof(ecc_stngs[0]), GFP_KERNEL);
if (!(mcis && ecc_stngs))
goto err_ret;
msrs = msrs_alloc();
if (!msrs)
goto err_free;
err = pci_register_driver(&amd64_pci_driver);
if (err)
goto err_pci;
err = -ENODEV;
if (!atomic_read(&drv_instances))
goto err_no_instances;
setup_pci_device();
return 0;
err_no_instances:
pci_unregister_driver(&amd64_pci_driver);
err_pci:
msrs_free(msrs);
msrs = NULL;
err_free:
kfree(mcis);
mcis = NULL;
kfree(ecc_stngs);
ecc_stngs = NULL;
err_ret:
return err;
}
static void __exit amd64_edac_exit(void)
{
if (amd64_ctl_pci)
edac_pci_release_generic_ctl(amd64_ctl_pci);
pci_unregister_driver(&amd64_pci_driver);
kfree(ecc_stngs);
ecc_stngs = NULL;
kfree(mcis);
mcis = NULL;
msrs_free(msrs);
msrs = NULL;
}
module_init(amd64_edac_init);
module_exit(amd64_edac_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("SoftwareBitMaker: Doug Thompson, "
"Dave Peterson, Thayne Harbaugh");
MODULE_DESCRIPTION("MC support for AMD64 memory controllers - "
EDAC_AMD64_VERSION);
module_param(edac_op_state, int, 0444);
MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI");
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