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aha/drivers/edac/amd64_edac.c
Doug Thompson b1289d6f9d amd64_edac: add ECC chipkill syndrome mapping table 
Borislav:

- fix comments
- cleanup debug calls

Reviewed-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Doug Thompson <dougthompson@xmission.com>
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2009-06-10 12:18:58 +02:00

2033 lines
61 KiB
C
Raw Blame History

#include "amd64_edac.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);
/* Lookup table for all possible MC control instances */
struct amd64_pvt;
static struct mem_ctl_info *mci_lookup[MAX_NUMNODES];
static struct amd64_pvt *pvt_lookup[MAX_NUMNODES];
/*
* 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_search_set_scrub_rate(struct pci_dev *ctl, u32 new_bw,
u32 min_scrubrate)
{
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_scrubrate)
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;
if (scrubval)
edac_printk(KERN_DEBUG, EDAC_MC,
"Setting scrub rate bandwidth: %u\n",
scrubrates[i].bandwidth);
else
edac_printk(KERN_DEBUG, EDAC_MC, "Turning scrubbing off.\n");
pci_write_bits32(ctl, K8_SCRCTRL, scrubval, 0x001F);
return 0;
}
static int amd64_set_scrub_rate(struct mem_ctl_info *mci, u32 *bandwidth)
{
struct amd64_pvt *pvt = mci->pvt_info;
u32 min_scrubrate = 0x0;
switch (boot_cpu_data.x86) {
case 0xf:
min_scrubrate = K8_MIN_SCRUB_RATE_BITS;
break;
case 0x10:
min_scrubrate = F10_MIN_SCRUB_RATE_BITS;
break;
case 0x11:
min_scrubrate = F11_MIN_SCRUB_RATE_BITS;
break;
default:
amd64_printk(KERN_ERR, "Unsupported family!\n");
break;
}
return amd64_search_set_scrub_rate(pvt->misc_f3_ctl, *bandwidth,
min_scrubrate);
}
static int amd64_get_scrub_rate(struct mem_ctl_info *mci, u32 *bw)
{
struct amd64_pvt *pvt = mci->pvt_info;
u32 scrubval = 0;
int status = -1, i, ret = 0;
ret = pci_read_config_dword(pvt->misc_f3_ctl, K8_SCRCTRL, &scrubval);
if (ret)
debugf0("Reading K8_SCRCTRL failed\n");
scrubval = scrubval & 0x001F;
edac_printk(KERN_DEBUG, EDAC_MC,
"pci-read, sdram scrub control value: %d \n", scrubval);
for (i = 0; ARRAY_SIZE(scrubrates); i++) {
if (scrubrates[i].scrubval == scrubval) {
*bw = scrubrates[i].bandwidth;
status = 0;
break;
}
}
return status;
}
/* Map from a CSROW entry to the mask entry that operates on it */
static inline u32 amd64_map_to_dcs_mask(struct amd64_pvt *pvt, int csrow)
{
return csrow >> (pvt->num_dcsm >> 3);
}
/* return the 'base' address the i'th CS entry of the 'dct' DRAM controller */
static u32 amd64_get_dct_base(struct amd64_pvt *pvt, int dct, int csrow)
{
if (dct == 0)
return pvt->dcsb0[csrow];
else
return pvt->dcsb1[csrow];
}
/*
* Return the 'mask' address the i'th CS entry. This function is needed because
* there number of DCSM registers on Rev E and prior vs Rev F and later is
* different.
*/
static u32 amd64_get_dct_mask(struct amd64_pvt *pvt, int dct, int csrow)
{
if (dct == 0)
return pvt->dcsm0[amd64_map_to_dcs_mask(pvt, csrow)];
else
return pvt->dcsm1[amd64_map_to_dcs_mask(pvt, csrow)];
}
/*
* In *base and *limit, pass back the full 40-bit base and limit physical
* addresses for the node given by node_id. This information is obtained from
* DRAM Base (section 3.4.4.1) and DRAM Limit (section 3.4.4.2) registers. The
* base and limit addresses are of type SysAddr, as defined at the start of
* section 3.4.4 (p. 70). They are the lowest and highest physical addresses
* in the address range they represent.
*/
static void amd64_get_base_and_limit(struct amd64_pvt *pvt, int node_id,
u64 *base, u64 *limit)
{
*base = pvt->dram_base[node_id];
*limit = pvt->dram_limit[node_id];
}
/*
* Return 1 if the SysAddr given by sys_addr matches the base/limit associated
* with node_id
*/
static int amd64_base_limit_match(struct amd64_pvt *pvt,
u64 sys_addr, int node_id)
{
u64 base, limit, addr;
amd64_get_base_and_limit(pvt, node_id, &base, &limit);
/* 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 >= base) && (addr <= limit);
}
/*
* 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 = pvt->dram_IntlvEn[0];
if (intlv_en == 0) {
for (node_id = 0; ; ) {
if (amd64_base_limit_match(pvt, sys_addr, node_id))
break;
if (++node_id >= DRAM_REG_COUNT)
goto err_no_match;
}
goto found;
}
if (unlikely((intlv_en != (0x01 << 8)) &&
(intlv_en != (0x03 << 8)) &&
(intlv_en != (0x07 << 8)))) {
amd64_printk(KERN_WARNING, "junk value of 0x%x extracted from "
"IntlvEn field of DRAM Base Register for node 0: "
"This probably indicates a BIOS bug.\n", intlv_en);
return NULL;
}
bits = (((u32) sys_addr) >> 12) & intlv_en;
for (node_id = 0; ; ) {
if ((pvt->dram_limit[node_id] & intlv_en) == bits)
break; /* intlv_sel field matches */
if (++node_id >= DRAM_REG_COUNT)
goto err_no_match;
}
/* sanity test for sys_addr */
if (unlikely(!amd64_base_limit_match(pvt, sys_addr, node_id))) {
amd64_printk(KERN_WARNING,
"%s(): sys_addr 0x%lx falls outside base/limit "
"address range for node %d with node interleaving "
"enabled.\n", __func__, (unsigned long)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;
}
/*
* Extract the DRAM CS base address from selected csrow register.
*/
static u64 base_from_dct_base(struct amd64_pvt *pvt, int csrow)
{
return ((u64) (amd64_get_dct_base(pvt, 0, csrow) & pvt->dcsb_base)) <<
pvt->dcs_shift;
}
/*
* Extract the mask from the dcsb0[csrow] entry in a CPU revision-specific way.
*/
static u64 mask_from_dct_mask(struct amd64_pvt *pvt, int csrow)
{
u64 dcsm_bits, other_bits;
u64 mask;
/* Extract bits from DRAM CS Mask. */
dcsm_bits = amd64_get_dct_mask(pvt, 0, csrow) & pvt->dcsm_mask;
other_bits = pvt->dcsm_mask;
other_bits = ~(other_bits << pvt->dcs_shift);
/*
* The extracted bits from DCSM belong in the spaces represented by
* the cleared bits in other_bits.
*/
mask = (dcsm_bits << pvt->dcs_shift) | other_bits;
return mask;
}
/*
* @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;
/*
* Here we use the DRAM CS Base and DRAM CS Mask registers. For each CS
* base/mask register pair, test the condition shown near the start of
* section 3.5.4 (p. 84, BKDG #26094, K8, revA-E).
*/
for (csrow = 0; csrow < CHIPSELECT_COUNT; csrow++) {
/* This DRAM chip select is disabled on this node */
if ((pvt->dcsb0[csrow] & K8_DCSB_CS_ENABLE) == 0)
continue;
base = base_from_dct_base(pvt, csrow);
mask = ~mask_from_dct_mask(pvt, csrow);
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;
}
/*
* Return the base value defined by the DRAM Base register for the node
* represented by mci. This function returns the full 40-bit value despite the
* fact that the register only stores bits 39-24 of the value. See section
* 3.4.4.1 (BKDG #26094, K8, revA-E)
*/
static inline u64 get_dram_base(struct mem_ctl_info *mci)
{
struct amd64_pvt *pvt = mci->pvt_info;
return pvt->dram_base[pvt->mc_node_id];
}
/*
* 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 < OPTERON_CPU_REV_E) {
debugf1(" revision %d for node %d does not support DHAR\n",
pvt->ext_model, pvt->mc_node_id);
return 1;
}
/* only valid for Fam10h */
if (boot_cpu_data.x86 == 0x10 &&
(pvt->dhar & F10_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->dhar);
*hole_base = base;
*hole_size = (0x1ull << 32) - base;
if (boot_cpu_data.x86 > 0xf)
*hole_offset = f10_dhar_offset(pvt->dhar);
else
*hole_offset = k8_dhar_offset(pvt->dhar);
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)
{
u64 dram_base, hole_base, hole_offset, hole_size, dram_addr;
int ret = 0;
dram_base = get_dram_base(mci);
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(pvt->dram_IntlvEn[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(pvt->dram_IntlvEn[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 = pvt->dram_IntlvSel[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, limit, 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;
}
}
amd64_get_base_and_limit(pvt, pvt->mc_node_id, &base, &limit);
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 >= CHIPSELECT_COUNT));
base = base_from_dct_base(pvt, csrow);
mask = mask_from_dct_mask(pvt, csrow);
*input_addr_min = base & ~mask;
*input_addr_max = base | mask | pvt->dcs_mask_notused;
}
/*
* Extract error address from MCA NB Address Low (section 3.6.4.5) and MCA NB
* Address High (section 3.6.4.6) register values and return the result. Address
* is located in the info structure (nbeah and nbeal), the encoding is device
* specific.
*/
static u64 extract_error_address(struct mem_ctl_info *mci,
struct amd64_error_info_regs *info)
{
struct amd64_pvt *pvt = mci->pvt_info;
return pvt->ops->get_error_address(mci, info);
}
/* 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_printk(mci, KERN_ERR,
"Failed to translate InputAddr to csrow for "
"address 0x%lx\n", (unsigned long)sys_addr);
return csrow;
}
static int get_channel_from_ecc_syndrome(unsigned short syndrome);
static void amd64_cpu_display_info(struct amd64_pvt *pvt)
{
if (boot_cpu_data.x86 == 0x11)
edac_printk(KERN_DEBUG, EDAC_MC, "F11h CPU detected\n");
else if (boot_cpu_data.x86 == 0x10)
edac_printk(KERN_DEBUG, EDAC_MC, "F10h CPU detected\n");
else if (boot_cpu_data.x86 == 0xf)
edac_printk(KERN_DEBUG, EDAC_MC, "%s detected\n",
(pvt->ext_model >= OPTERON_CPU_REV_F) ?
"Rev F or later" : "Rev E or earlier");
else
/* we'll hardly ever ever get here */
edac_printk(KERN_ERR, EDAC_MC, "Unknown cpu!\n");
}
/*
* 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_NONE;
bit = (boot_cpu_data.x86 > 0xf || pvt->ext_model >= OPTERON_CPU_REV_F)
? 19
: 17;
if (pvt->dclr0 >> BIT(bit))
edac_cap = EDAC_FLAG_SECDED;
return edac_cap;
}
static void f10_debug_display_dimm_sizes(int ctrl, struct amd64_pvt *pvt,
int ganged);
/* Display and decode various NB registers for debug purposes. */
static void amd64_dump_misc_regs(struct amd64_pvt *pvt)
{
int ganged;
debugf1(" nbcap:0x%8.08x DctDualCap=%s DualNode=%s 8-Node=%s\n",
pvt->nbcap,
(pvt->nbcap & K8_NBCAP_DCT_DUAL) ? "True" : "False",
(pvt->nbcap & K8_NBCAP_DUAL_NODE) ? "True" : "False",
(pvt->nbcap & K8_NBCAP_8_NODE) ? "True" : "False");
debugf1(" ECC Capable=%s ChipKill Capable=%s\n",
(pvt->nbcap & K8_NBCAP_SECDED) ? "True" : "False",
(pvt->nbcap & K8_NBCAP_CHIPKILL) ? "True" : "False");
debugf1(" DramCfg0-low=0x%08x DIMM-ECC=%s Parity=%s Width=%s\n",
pvt->dclr0,
(pvt->dclr0 & BIT(19)) ? "Enabled" : "Disabled",
(pvt->dclr0 & BIT(8)) ? "Enabled" : "Disabled",
(pvt->dclr0 & BIT(11)) ? "128b" : "64b");
debugf1(" DIMM x4 Present: L0=%s L1=%s L2=%s L3=%s DIMM Type=%s\n",
(pvt->dclr0 & BIT(12)) ? "Y" : "N",
(pvt->dclr0 & BIT(13)) ? "Y" : "N",
(pvt->dclr0 & BIT(14)) ? "Y" : "N",
(pvt->dclr0 & BIT(15)) ? "Y" : "N",
(pvt->dclr0 & BIT(16)) ? "UN-Buffered" : "Buffered");
debugf1(" online-spare: 0x%8.08x\n", pvt->online_spare);
if (boot_cpu_data.x86 == 0xf) {
debugf1(" dhar: 0x%8.08x Base=0x%08x Offset=0x%08x\n",
pvt->dhar, dhar_base(pvt->dhar),
k8_dhar_offset(pvt->dhar));
debugf1(" DramHoleValid=%s\n",
(pvt->dhar & DHAR_VALID) ? "True" : "False");
debugf1(" dbam-dkt: 0x%8.08x\n", pvt->dbam0);
/* everything below this point is Fam10h and above */
return;
} else {
debugf1(" dhar: 0x%8.08x Base=0x%08x Offset=0x%08x\n",
pvt->dhar, dhar_base(pvt->dhar),
f10_dhar_offset(pvt->dhar));
debugf1(" DramMemHoistValid=%s DramHoleValid=%s\n",
(pvt->dhar & F10_DRAM_MEM_HOIST_VALID) ?
"True" : "False",
(pvt->dhar & DHAR_VALID) ?
"True" : "False");
}
/* Only if NOT ganged does dcl1 have valid info */
if (!dct_ganging_enabled(pvt)) {
debugf1(" DramCfg1-low=0x%08x DIMM-ECC=%s Parity=%s "
"Width=%s\n", pvt->dclr1,
(pvt->dclr1 & BIT(19)) ? "Enabled" : "Disabled",
(pvt->dclr1 & BIT(8)) ? "Enabled" : "Disabled",
(pvt->dclr1 & BIT(11)) ? "128b" : "64b");
debugf1(" DIMM x4 Present: L0=%s L1=%s L2=%s L3=%s "
"DIMM Type=%s\n",
(pvt->dclr1 & BIT(12)) ? "Y" : "N",
(pvt->dclr1 & BIT(13)) ? "Y" : "N",
(pvt->dclr1 & BIT(14)) ? "Y" : "N",
(pvt->dclr1 & BIT(15)) ? "Y" : "N",
(pvt->dclr1 & BIT(16)) ? "UN-Buffered" : "Buffered");
}
/*
* Determine if ganged and then dump memory sizes for first controller,
* and if NOT ganged dump info for 2nd controller.
*/
ganged = dct_ganging_enabled(pvt);
f10_debug_display_dimm_sizes(0, pvt, ganged);
if (!ganged)
f10_debug_display_dimm_sizes(1, pvt, ganged);
}
/* Read in both of DBAM registers */
static void amd64_read_dbam_reg(struct amd64_pvt *pvt)
{
int err = 0;
unsigned int reg;
reg = DBAM0;
err = pci_read_config_dword(pvt->dram_f2_ctl, reg, &pvt->dbam0);
if (err)
goto err_reg;
if (boot_cpu_data.x86 >= 0x10) {
reg = DBAM1;
err = pci_read_config_dword(pvt->dram_f2_ctl, reg, &pvt->dbam1);
if (err)
goto err_reg;
}
err_reg:
debugf0("Error reading F2x%03x.\n", reg);
}
/*
* NOTE: CPU Revision Dependent code: Rev E and Rev F
*
* Set the DCSB and DCSM mask values depending on the CPU revision value. Also
* set the shift factor for the DCSB and DCSM values.
*
* ->dcs_mask_notused, RevE:
*
* To find the max InputAddr for the csrow, start with the base address and set
* all bits that are "don't care" bits in the test at the start of section
* 3.5.4 (p. 84).
*
* The "don't care" bits are all set bits in the mask and all bits in the gaps
* between bit ranges [35:25] and [19:13]. The value REV_E_DCS_NOTUSED_BITS
* represents bits [24:20] and [12:0], which are all bits in the above-mentioned
* gaps.
*
* ->dcs_mask_notused, RevF and later:
*
* To find the max InputAddr for the csrow, start with the base address and set
* all bits that are "don't care" bits in the test at the start of NPT section
* 4.5.4 (p. 87).
*
* The "don't care" bits are all set bits in the mask and all bits in the gaps
* between bit ranges [36:27] and [21:13].
*
* The value REV_F_F1Xh_DCS_NOTUSED_BITS represents bits [26:22] and [12:0],
* which are all bits in the above-mentioned gaps.
*/
static void amd64_set_dct_base_and_mask(struct amd64_pvt *pvt)
{
if (pvt->ext_model >= OPTERON_CPU_REV_F) {
pvt->dcsb_base = REV_F_F1Xh_DCSB_BASE_BITS;
pvt->dcsm_mask = REV_F_F1Xh_DCSM_MASK_BITS;
pvt->dcs_mask_notused = REV_F_F1Xh_DCS_NOTUSED_BITS;
pvt->dcs_shift = REV_F_F1Xh_DCS_SHIFT;
switch (boot_cpu_data.x86) {
case 0xf:
pvt->num_dcsm = REV_F_DCSM_COUNT;
break;
case 0x10:
pvt->num_dcsm = F10_DCSM_COUNT;
break;
case 0x11:
pvt->num_dcsm = F11_DCSM_COUNT;
break;
default:
amd64_printk(KERN_ERR, "Unsupported family!\n");
break;
}
} else {
pvt->dcsb_base = REV_E_DCSB_BASE_BITS;
pvt->dcsm_mask = REV_E_DCSM_MASK_BITS;
pvt->dcs_mask_notused = REV_E_DCS_NOTUSED_BITS;
pvt->dcs_shift = REV_E_DCS_SHIFT;
pvt->num_dcsm = REV_E_DCSM_COUNT;
}
}
/*
* Function 2 Offset F10_DCSB0; read in the DCS Base and DCS Mask hw registers
*/
static void amd64_read_dct_base_mask(struct amd64_pvt *pvt)
{
int cs, reg, err = 0;
amd64_set_dct_base_and_mask(pvt);
for (cs = 0; cs < CHIPSELECT_COUNT; cs++) {
reg = K8_DCSB0 + (cs * 4);
err = pci_read_config_dword(pvt->dram_f2_ctl, reg,
&pvt->dcsb0[cs]);
if (unlikely(err))
debugf0("Reading K8_DCSB0[%d] failed\n", cs);
else
debugf0(" DCSB0[%d]=0x%08x reg: F2x%x\n",
cs, pvt->dcsb0[cs], reg);
/* If DCT are NOT ganged, then read in DCT1's base */
if (boot_cpu_data.x86 >= 0x10 && !dct_ganging_enabled(pvt)) {
reg = F10_DCSB1 + (cs * 4);
err = pci_read_config_dword(pvt->dram_f2_ctl, reg,
&pvt->dcsb1[cs]);
if (unlikely(err))
debugf0("Reading F10_DCSB1[%d] failed\n", cs);
else
debugf0(" DCSB1[%d]=0x%08x reg: F2x%x\n",
cs, pvt->dcsb1[cs], reg);
} else {
pvt->dcsb1[cs] = 0;
}
}
for (cs = 0; cs < pvt->num_dcsm; cs++) {
reg = K8_DCSB0 + (cs * 4);
err = pci_read_config_dword(pvt->dram_f2_ctl, reg,
&pvt->dcsm0[cs]);
if (unlikely(err))
debugf0("Reading K8_DCSM0 failed\n");
else
debugf0(" DCSM0[%d]=0x%08x reg: F2x%x\n",
cs, pvt->dcsm0[cs], reg);
/* If DCT are NOT ganged, then read in DCT1's mask */
if (boot_cpu_data.x86 >= 0x10 && !dct_ganging_enabled(pvt)) {
reg = F10_DCSM1 + (cs * 4);
err = pci_read_config_dword(pvt->dram_f2_ctl, reg,
&pvt->dcsm1[cs]);
if (unlikely(err))
debugf0("Reading F10_DCSM1[%d] failed\n", cs);
else
debugf0(" DCSM1[%d]=0x%08x reg: F2x%x\n",
cs, pvt->dcsm1[cs], reg);
} else
pvt->dcsm1[cs] = 0;
}
}
static enum mem_type amd64_determine_memory_type(struct amd64_pvt *pvt)
{
enum mem_type type;
if (boot_cpu_data.x86 >= 0x10 || pvt->ext_model >= OPTERON_CPU_REV_F) {
/* Rev F and later */
type = (pvt->dclr0 & BIT(16)) ? MEM_DDR2 : MEM_RDDR2;
} else {
/* Rev E and earlier */
type = (pvt->dclr0 & BIT(18)) ? MEM_DDR : MEM_RDDR;
}
debugf1(" Memory type is: %s\n",
(type == MEM_DDR2) ? "MEM_DDR2" :
(type == MEM_RDDR2) ? "MEM_RDDR2" :
(type == MEM_DDR) ? "MEM_DDR" : "MEM_RDDR");
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 = pci_read_config_dword(pvt->dram_f2_ctl, F10_DCLR_0, &pvt->dclr0);
if (err)
return err;
if ((boot_cpu_data.x86_model >> 4) >= OPTERON_CPU_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 amd64_error_info_regs *info)
{
return (((u64) (info->nbeah & 0xff)) << 32) +
(info->nbeal & ~0x03);
}
/*
* Read the Base and Limit registers for K8 based Memory controllers; extract
* fields from the 'raw' reg into separate data fields
*
* Isolates: BASE, LIMIT, IntlvEn, IntlvSel, RW_EN
*/
static void k8_read_dram_base_limit(struct amd64_pvt *pvt, int dram)
{
u32 low;
u32 off = dram << 3; /* 8 bytes between DRAM entries */
int err;
err = pci_read_config_dword(pvt->addr_f1_ctl,
K8_DRAM_BASE_LOW + off, &low);
if (err)
debugf0("Reading K8_DRAM_BASE_LOW failed\n");
/* Extract parts into separate data entries */
pvt->dram_base[dram] = ((u64) low & 0xFFFF0000) << 8;
pvt->dram_IntlvEn[dram] = (low >> 8) & 0x7;
pvt->dram_rw_en[dram] = (low & 0x3);
err = pci_read_config_dword(pvt->addr_f1_ctl,
K8_DRAM_LIMIT_LOW + off, &low);
if (err)
debugf0("Reading K8_DRAM_LIMIT_LOW failed\n");
/*
* Extract parts into separate data entries. Limit is the HIGHEST memory
* location of the region, so lower 24 bits need to be all ones
*/
pvt->dram_limit[dram] = (((u64) low & 0xFFFF0000) << 8) | 0x00FFFFFF;
pvt->dram_IntlvSel[dram] = (low >> 8) & 0x7;
pvt->dram_DstNode[dram] = (low & 0x7);
}
static void k8_map_sysaddr_to_csrow(struct mem_ctl_info *mci,
struct amd64_error_info_regs *info,
u64 SystemAddress)
{
struct mem_ctl_info *src_mci;
unsigned short syndrome;
int channel, csrow;
u32 page, offset;
/* Extract the syndrome parts and form a 16-bit syndrome */
syndrome = EXTRACT_HIGH_SYNDROME(info->nbsl) << 8;
syndrome |= EXTRACT_LOW_SYNDROME(info->nbsh);
/* CHIPKILL enabled */
if (info->nbcfg & K8_NBCFG_CHIPKILL) {
channel = get_channel_from_ecc_syndrome(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_printk(mci, KERN_WARNING,
"unknown syndrome 0x%x - 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 = ((SystemAddress & 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, SystemAddress);
if (src_mci) {
amd64_mc_printk(mci, KERN_ERR,
"failed to map error address 0x%lx to a node\n",
(unsigned long)SystemAddress);
edac_mc_handle_ce_no_info(mci, EDAC_MOD_STR);
return;
}
/* Now map the SystemAddress to a CSROW */
csrow = sys_addr_to_csrow(src_mci, SystemAddress);
if (csrow < 0) {
edac_mc_handle_ce_no_info(src_mci, EDAC_MOD_STR);
} else {
error_address_to_page_and_offset(SystemAddress, &page, &offset);
edac_mc_handle_ce(src_mci, page, offset, syndrome, csrow,
channel, EDAC_MOD_STR);
}
}
/*
* determrine the number of PAGES in for this DIMM's size based on its DRAM
* Address Mapping.
*
* First step is to calc the number of bits to shift a value of 1 left to
* indicate show many pages. Start with the DBAM value as the starting bits,
* then proceed to adjust those shift bits, based on CPU rev and the table.
* See BKDG on the DBAM
*/
static int k8_dbam_map_to_pages(struct amd64_pvt *pvt, int dram_map)
{
int nr_pages;
if (pvt->ext_model >= OPTERON_CPU_REV_F) {
nr_pages = 1 << (revf_quad_ddr2_shift[dram_map] - PAGE_SHIFT);
} else {
/*
* RevE and less section; this line is tricky. It collapses the
* table used by RevD and later to one that matches revisions CG
* and earlier.
*/
dram_map -= (pvt->ext_model >= OPTERON_CPU_REV_D) ?
(dram_map > 8 ? 4 : (dram_map > 5 ?
3 : (dram_map > 2 ? 1 : 0))) : 0;
/* 25 shift is 32MiB minimum DIMM size in RevE and prior */
nr_pages = 1 << (dram_map + 25 - PAGE_SHIFT);
}
return nr_pages;
}
/*
* 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 err = 0, channels = 0;
u32 dbam;
err = pci_read_config_dword(pvt->dram_f2_ctl, F10_DCLR_0, &pvt->dclr0);
if (err)
goto err_reg;
err = pci_read_config_dword(pvt->dram_f2_ctl, F10_DCLR_1, &pvt->dclr1);
if (err)
goto err_reg;
/* If we are in 128 bit mode, then we are using 2 channels */
if (pvt->dclr0 & F10_WIDTH_128) {
debugf0("Data WIDTH is 128 bits - 2 channels\n");
channels = 2;
return channels;
}
/*
* Need to check if in UN-ganged mode: In such, there are 2 channels,
* but they are NOT in 128 bit mode and thus the above 'dcl0' 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.
*/
channels = 0;
err = pci_read_config_dword(pvt->dram_f2_ctl, DBAM0, &dbam);
if (err)
goto err_reg;
if (DBAM_DIMM(0, dbam) > 0)
channels++;
if (DBAM_DIMM(1, dbam) > 0)
channels++;
if (DBAM_DIMM(2, dbam) > 0)
channels++;
if (DBAM_DIMM(3, dbam) > 0)
channels++;
/* If more than 2 DIMMs are present, then we have 2 channels */
if (channels > 2)
channels = 2;
else if (channels == 0) {
/* No DIMMs on DCT0, so look at DCT1 */
err = pci_read_config_dword(pvt->dram_f2_ctl, DBAM1, &dbam);
if (err)
goto err_reg;
if (DBAM_DIMM(0, dbam) > 0)
channels++;
if (DBAM_DIMM(1, dbam) > 0)
channels++;
if (DBAM_DIMM(2, dbam) > 0)
channels++;
if (DBAM_DIMM(3, dbam) > 0)
channels++;
if (channels > 2)
channels = 2;
}
/* If we found ALL 0 values, then assume just ONE DIMM-ONE Channel */
if (channels == 0)
channels = 1;
debugf0("DIMM count= %d\n", channels);
return channels;
err_reg:
return -1;
}
static int f10_dbam_map_to_pages(struct amd64_pvt *pvt, int dram_map)
{
return 1 << (revf_quad_ddr2_shift[dram_map] - PAGE_SHIFT);
}
/* Enable extended configuration access via 0xCF8 feature */
static void amd64_setup(struct amd64_pvt *pvt)
{
u32 reg;
pci_read_config_dword(pvt->misc_f3_ctl, F10_NB_CFG_HIGH, &reg);
pvt->flags.cf8_extcfg = !!(reg & F10_NB_CFG_LOW_ENABLE_EXT_CFG);
reg |= F10_NB_CFG_LOW_ENABLE_EXT_CFG;
pci_write_config_dword(pvt->misc_f3_ctl, F10_NB_CFG_HIGH, reg);
}
/* Restore the extended configuration access via 0xCF8 feature */
static void amd64_teardown(struct amd64_pvt *pvt)
{
u32 reg;
pci_read_config_dword(pvt->misc_f3_ctl, F10_NB_CFG_HIGH, &reg);
reg &= ~F10_NB_CFG_LOW_ENABLE_EXT_CFG;
if (pvt->flags.cf8_extcfg)
reg |= F10_NB_CFG_LOW_ENABLE_EXT_CFG;
pci_write_config_dword(pvt->misc_f3_ctl, F10_NB_CFG_HIGH, reg);
}
static u64 f10_get_error_address(struct mem_ctl_info *mci,
struct amd64_error_info_regs *info)
{
return (((u64) (info->nbeah & 0xffff)) << 32) +
(info->nbeal & ~0x01);
}
/*
* Read the Base and Limit registers for F10 based Memory controllers. Extract
* fields from the 'raw' reg into separate data fields.
*
* Isolates: BASE, LIMIT, IntlvEn, IntlvSel, RW_EN.
*/
static void f10_read_dram_base_limit(struct amd64_pvt *pvt, int dram)
{
u32 high_offset, low_offset, high_base, low_base, high_limit, low_limit;
low_offset = K8_DRAM_BASE_LOW + (dram << 3);
high_offset = F10_DRAM_BASE_HIGH + (dram << 3);
/* read the 'raw' DRAM BASE Address register */
pci_read_config_dword(pvt->addr_f1_ctl, low_offset, &low_base);
/* Read from the ECS data register */
pci_read_config_dword(pvt->addr_f1_ctl, high_offset, &high_base);
/* Extract parts into separate data entries */
pvt->dram_rw_en[dram] = (low_base & 0x3);
if (pvt->dram_rw_en[dram] == 0)
return;
pvt->dram_IntlvEn[dram] = (low_base >> 8) & 0x7;
pvt->dram_base[dram] = (((((u64) high_base & 0x000000FF) << 32) |
((u64) low_base & 0xFFFF0000))) << 8;
low_offset = K8_DRAM_LIMIT_LOW + (dram << 3);
high_offset = F10_DRAM_LIMIT_HIGH + (dram << 3);
/* read the 'raw' LIMIT registers */
pci_read_config_dword(pvt->addr_f1_ctl, low_offset, &low_limit);
/* Read from the ECS data register for the HIGH portion */
pci_read_config_dword(pvt->addr_f1_ctl, high_offset, &high_limit);
debugf0(" HW Regs: BASE=0x%08x-%08x LIMIT= 0x%08x-%08x\n",
high_base, low_base, high_limit, low_limit);
pvt->dram_DstNode[dram] = (low_limit & 0x7);
pvt->dram_IntlvSel[dram] = (low_limit >> 8) & 0x7;
/*
* Extract address values and form a LIMIT address. Limit is the HIGHEST
* memory location of the region, so low 24 bits need to be all ones.
*/
low_limit |= 0x0000FFFF;
pvt->dram_limit[dram] =
((((u64) high_limit << 32) + (u64) low_limit) << 8) | (0xFF);
}
static void f10_read_dram_ctl_register(struct amd64_pvt *pvt)
{
int err = 0;
err = pci_read_config_dword(pvt->dram_f2_ctl, F10_DCTL_SEL_LOW,
&pvt->dram_ctl_select_low);
if (err) {
debugf0("Reading F10_DCTL_SEL_LOW failed\n");
} else {
debugf0("DRAM_DCTL_SEL_LOW=0x%x DctSelBaseAddr=0x%x\n",
pvt->dram_ctl_select_low, dct_sel_baseaddr(pvt));
debugf0(" DRAM DCTs are=%s DRAM Is=%s DRAM-Ctl-"
"sel-hi-range=%s\n",
(dct_ganging_enabled(pvt) ? "GANGED" : "NOT GANGED"),
(dct_dram_enabled(pvt) ? "Enabled" : "Disabled"),
(dct_high_range_enabled(pvt) ? "Enabled" : "Disabled"));
debugf0(" DctDatIntLv=%s MemCleared=%s DctSelIntLvAddr=0x%x\n",
(dct_data_intlv_enabled(pvt) ? "Enabled" : "Disabled"),
(dct_memory_cleared(pvt) ? "True " : "False "),
dct_sel_interleave_addr(pvt));
}
err = pci_read_config_dword(pvt->dram_f2_ctl, F10_DCTL_SEL_HIGH,
&pvt->dram_ctl_select_high);
if (err)
debugf0("Reading F10_DCTL_SEL_HIGH failed\n");
}
/*
* determine channel based on the interleaving mode: F10h BKDG, 2.8.9 Memory
* Interleaving Modes.
*/
static u32 f10_determine_channel(struct amd64_pvt *pvt, u64 sys_addr,
int hi_range_sel, u32 intlv_en)
{
u32 cs, temp, dct_sel_high = (pvt->dram_ctl_select_low >> 1) & 1;
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, u32 hole_off,
u64 dram_base)
{
u64 chan_off;
if (hi_range_sel) {
if (!(dct_sel_base_addr & 0xFFFFF800) &&
hole_valid && (sys_addr >= 0x100000000ULL))
chan_off = hole_off << 16;
else
chan_off = dct_sel_base_off;
} else {
if (hole_valid && (sys_addr >= 0x100000000ULL))
chan_off = hole_off << 16;
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 inline int f10_process_possible_spare(int csrow,
u32 cs, struct amd64_pvt *pvt)
{
u32 swap_done;
u32 bad_dram_cs;
/* Depending on channel, isolate respective SPARING info */
if (cs) {
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(u32 in_addr, u32 nid, u32 cs)
{
struct mem_ctl_info *mci;
struct amd64_pvt *pvt;
u32 cs_base, cs_mask;
int cs_found = -EINVAL;
int csrow;
mci = mci_lookup[nid];
if (!mci)
return cs_found;
pvt = mci->pvt_info;
debugf1("InputAddr=0x%x channelselect=%d\n", in_addr, cs);
for (csrow = 0; csrow < CHIPSELECT_COUNT; csrow++) {
cs_base = amd64_get_dct_base(pvt, cs, csrow);
if (!(cs_base & K8_DCSB_CS_ENABLE))
continue;
/*
* We have an ENABLED CSROW, Isolate just the MASK bits of the
* target: [28:19] and [13:5], which map to [36:27] and [21:13]
* of the actual address.
*/
cs_base &= REV_F_F1Xh_DCSB_BASE_BITS;
/*
* Get the DCT Mask, and ENABLE the reserved bits: [18:16] and
* [4:0] to become ON. Then mask off bits [28:0] ([36:8])
*/
cs_mask = amd64_get_dct_mask(pvt, cs, csrow);
debugf1(" CSROW=%d CSBase=0x%x RAW CSMask=0x%x\n",
csrow, cs_base, cs_mask);
cs_mask = (cs_mask | 0x0007C01F) & 0x1FFFFFFF;
debugf1(" Final CSMask=0x%x\n", cs_mask);
debugf1(" (InputAddr & ~CSMask)=0x%x "
"(CSBase & ~CSMask)=0x%x\n",
(in_addr & ~cs_mask), (cs_base & ~cs_mask));
if ((in_addr & ~cs_mask) == (cs_base & ~cs_mask)) {
cs_found = f10_process_possible_spare(csrow, cs, pvt);
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 dram_range,
u64 sys_addr, int *nid, int *chan_sel)
{
int node_id, cs_found = -EINVAL, high_range = 0;
u32 intlv_en, intlv_sel, intlv_shift, hole_off;
u32 hole_valid, tmp, dct_sel_base, channel;
u64 dram_base, chan_addr, dct_sel_base_off;
dram_base = pvt->dram_base[dram_range];
intlv_en = pvt->dram_IntlvEn[dram_range];
node_id = pvt->dram_DstNode[dram_range];
intlv_sel = pvt->dram_IntlvSel[dram_range];
debugf1("(dram=%d) Base=0x%llx SystemAddr= 0x%llx Limit=0x%llx\n",
dram_range, dram_base, sys_addr, pvt->dram_limit[dram_range]);
/*
* This assumes that one node's DHAR is the same as all the other
* nodes' DHAR.
*/
hole_off = (pvt->dhar & 0x0000FF80);
hole_valid = (pvt->dhar & 0x1);
dct_sel_base_off = (pvt->dram_ctl_select_high & 0xFFFFFC00) << 16;
debugf1(" HoleOffset=0x%x HoleValid=0x%x 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) >> 8 becomes InputAddr=0x%x\n",
chan_addr, (u32)(chan_addr >> 8));
cs_found = f10_lookup_addr_in_dct(chan_addr >> 8, 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 dram_range, cs_found = -EINVAL;
u64 dram_base, dram_limit;
for (dram_range = 0; dram_range < DRAM_REG_COUNT; dram_range++) {
if (!pvt->dram_rw_en[dram_range])
continue;
dram_base = pvt->dram_base[dram_range];
dram_limit = pvt->dram_limit[dram_range];
if ((dram_base <= sys_addr) && (sys_addr <= dram_limit)) {
cs_found = f10_match_to_this_node(pvt, dram_range,
sys_addr, node,
chan_sel);
if (cs_found >= 0)
break;
}
}
return cs_found;
}
/*
* This the F10h reference code from AMD to map a @sys_addr to NodeID,
* CSROW, Channel.
*
* The @sys_addr is usually an error address received from the hardware.
*/
static void f10_map_sysaddr_to_csrow(struct mem_ctl_info *mci,
struct amd64_error_info_regs *info,
u64 sys_addr)
{
struct amd64_pvt *pvt = mci->pvt_info;
u32 page, offset;
unsigned short syndrome;
int nid, csrow, chan = 0;
csrow = f10_translate_sysaddr_to_cs(pvt, sys_addr, &nid, &chan);
if (csrow >= 0) {
error_address_to_page_and_offset(sys_addr, &page, &offset);
syndrome = EXTRACT_HIGH_SYNDROME(info->nbsl) << 8;
syndrome |= EXTRACT_LOW_SYNDROME(info->nbsh);
/*
* Is CHIPKILL on? If so, then we can attempt to use the
* syndrome to isolate which channel the error was on.
*/
if (pvt->nbcfg & K8_NBCFG_CHIPKILL)
chan = get_channel_from_ecc_syndrome(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);
}
}
} else {
edac_mc_handle_ce_no_info(mci, EDAC_MOD_STR);
}
}
/*
* Input (@index) is the DBAM DIMM value (1 of 4) used as an index into a shift
* table (revf_quad_ddr2_shift) which starts at 128MB DIMM size. Index of 0
* indicates an empty DIMM slot, as reported by Hardware on empty slots.
*
* Normalize to 128MB by subracting 27 bit shift.
*/
static int map_dbam_to_csrow_size(int index)
{
int mega_bytes = 0;
if (index > 0 && index <= DBAM_MAX_VALUE)
mega_bytes = ((128 << (revf_quad_ddr2_shift[index]-27)));
return mega_bytes;
}
/*
* debug routine to display the memory sizes of a DIMM (ganged or not) and it
* CSROWs as well
*/
static void f10_debug_display_dimm_sizes(int ctrl, struct amd64_pvt *pvt,
int ganged)
{
int dimm, size0, size1;
u32 dbam;
u32 *dcsb;
debugf1(" dbam%d: 0x%8.08x CSROW is %s\n", ctrl,
ctrl ? pvt->dbam1 : pvt->dbam0,
ganged ? "GANGED - dbam1 not used" : "NON-GANGED");
dbam = ctrl ? pvt->dbam1 : pvt->dbam0;
dcsb = ctrl ? pvt->dcsb1 : pvt->dcsb0;
/* Dump memory sizes for DIMM and its CSROWs */
for (dimm = 0; dimm < 4; dimm++) {
size0 = 0;
if (dcsb[dimm*2] & K8_DCSB_CS_ENABLE)
size0 = map_dbam_to_csrow_size(DBAM_DIMM(dimm, dbam));
size1 = 0;
if (dcsb[dimm*2 + 1] & K8_DCSB_CS_ENABLE)
size1 = map_dbam_to_csrow_size(DBAM_DIMM(dimm, dbam));
debugf1(" CTRL-%d DIMM-%d=%5dMB CSROW-%d=%5dMB "
"CSROW-%d=%5dMB\n",
ctrl,
dimm,
size0 + size1,
dimm * 2,
size0,
dimm * 2 + 1,
size1);
}
}
/*
* Very early hardware probe on pci_probe thread to determine if this module
* supports the hardware.
*
* Return:
* 0 for OK
* 1 for error
*/
static int f10_probe_valid_hardware(struct amd64_pvt *pvt)
{
int ret = 0;
/*
* If we are on a DDR3 machine, we don't know yet if
* we support that properly at this time
*/
if ((pvt->dchr0 & F10_DCHR_Ddr3Mode) ||
(pvt->dchr1 & F10_DCHR_Ddr3Mode)) {
amd64_printk(KERN_WARNING,
"%s() This machine is running with DDR3 memory. "
"This is not currently supported. "
"DCHR0=0x%x DCHR1=0x%x\n",
__func__, pvt->dchr0, pvt->dchr1);
amd64_printk(KERN_WARNING,
" Contact '%s' module MAINTAINER to help add"
" support.\n",
EDAC_MOD_STR);
ret = 1;
}
return ret;
}
/*
* There currently are 3 types type of MC devices for AMD Athlon/Opterons
* (as per PCI DEVICE_IDs):
*
* Family K8: That is the Athlon64 and Opteron CPUs. They all have the same PCI
* DEVICE ID, even though there is differences between the different Revisions
* (CG,D,E,F).
*
* Family F10h and F11h.
*
*/
static struct amd64_family_type amd64_family_types[] = {
[K8_CPUS] = {
.ctl_name = "RevF",
.addr_f1_ctl = PCI_DEVICE_ID_AMD_K8_NB_ADDRMAP,
.misc_f3_ctl = PCI_DEVICE_ID_AMD_K8_NB_MISC,
.ops = {
.early_channel_count = k8_early_channel_count,
.get_error_address = k8_get_error_address,
.read_dram_base_limit = k8_read_dram_base_limit,
.map_sysaddr_to_csrow = k8_map_sysaddr_to_csrow,
.dbam_map_to_pages = k8_dbam_map_to_pages,
}
},
[F10_CPUS] = {
.ctl_name = "Family 10h",
.addr_f1_ctl = PCI_DEVICE_ID_AMD_10H_NB_MAP,
.misc_f3_ctl = PCI_DEVICE_ID_AMD_10H_NB_MISC,
.ops = {
.probe_valid_hardware = f10_probe_valid_hardware,
.early_channel_count = f10_early_channel_count,
.get_error_address = f10_get_error_address,
.read_dram_base_limit = f10_read_dram_base_limit,
.read_dram_ctl_register = f10_read_dram_ctl_register,
.map_sysaddr_to_csrow = f10_map_sysaddr_to_csrow,
.dbam_map_to_pages = f10_dbam_map_to_pages,
}
},
[F11_CPUS] = {
.ctl_name = "Family 11h",
.addr_f1_ctl = PCI_DEVICE_ID_AMD_11H_NB_MAP,
.misc_f3_ctl = PCI_DEVICE_ID_AMD_11H_NB_MISC,
.ops = {
.probe_valid_hardware = f10_probe_valid_hardware,
.early_channel_count = f10_early_channel_count,
.get_error_address = f10_get_error_address,
.read_dram_base_limit = f10_read_dram_base_limit,
.read_dram_ctl_register = f10_read_dram_ctl_register,
.map_sysaddr_to_csrow = f10_map_sysaddr_to_csrow,
.dbam_map_to_pages = f10_dbam_map_to_pages,
}
},
};
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;
}
/*
* syndrome mapping table for ECC ChipKill devices
*
* The comment in each row is the token (nibble) number that is in error.
* The least significant nibble of the syndrome is the mask for the bits
* that are in error (need to be toggled) for the particular nibble.
*
* Each row contains 16 entries.
* The first entry (0th) is the channel number for that row of syndromes.
* The remaining 15 entries are the syndromes for the respective Error
* bit mask index.
*
* 1st index entry is 0x0001 mask, indicating that the rightmost bit is the
* bit in error.
* The 2nd index entry is 0x0010 that the second bit is damaged.
* The 3rd index entry is 0x0011 indicating that the rightmost 2 bits
* are damaged.
* Thus so on until index 15, 0x1111, whose entry has the syndrome
* indicating that all 4 bits are damaged.
*
* A search is performed on this table looking for a given syndrome.
*
* See the AMD documentation for ECC syndromes. This ECC table is valid
* across all the versions of the AMD64 processors.
*
* A fast lookup is to use the LAST four bits of the 16-bit syndrome as a
* COLUMN index, then search all ROWS of that column, looking for a match
* with the input syndrome. The ROW value will be the token number.
*
* The 0'th entry on that row, can be returned as the CHANNEL (0 or 1) of this
* error.
*/
#define NUMBER_ECC_ROWS 36
static const unsigned short ecc_chipkill_syndromes[NUMBER_ECC_ROWS][16] = {
/* Channel 0 syndromes */
{/*0*/ 0, 0xe821, 0x7c32, 0x9413, 0xbb44, 0x5365, 0xc776, 0x2f57,
0xdd88, 0x35a9, 0xa1ba, 0x499b, 0x66cc, 0x8eed, 0x1afe, 0xf2df },
{/*1*/ 0, 0x5d31, 0xa612, 0xfb23, 0x9584, 0xc8b5, 0x3396, 0x6ea7,
0xeac8, 0xb7f9, 0x4cda, 0x11eb, 0x7f4c, 0x227d, 0xd95e, 0x846f },
{/*2*/ 0, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007,
0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f },
{/*3*/ 0, 0x2021, 0x3032, 0x1013, 0x4044, 0x6065, 0x7076, 0x5057,
0x8088, 0xa0a9, 0xb0ba, 0x909b, 0xc0cc, 0xe0ed, 0xf0fe, 0xd0df },
{/*4*/ 0, 0x5041, 0xa082, 0xf0c3, 0x9054, 0xc015, 0x30d6, 0x6097,
0xe0a8, 0xb0e9, 0x402a, 0x106b, 0x70fc, 0x20bd, 0xd07e, 0x803f },
{/*5*/ 0, 0xbe21, 0xd732, 0x6913, 0x2144, 0x9f65, 0xf676, 0x4857,
0x3288, 0x8ca9, 0xe5ba, 0x5b9b, 0x13cc, 0xaded, 0xc4fe, 0x7adf },
{/*6*/ 0, 0x4951, 0x8ea2, 0xc7f3, 0x5394, 0x1ac5, 0xdd36, 0x9467,
0xa1e8, 0xe8b9, 0x2f4a, 0x661b, 0xf27c, 0xbb2d, 0x7cde, 0x358f },
{/*7*/ 0, 0x74e1, 0x9872, 0xec93, 0xd6b4, 0xa255, 0x4ec6, 0x3a27,
0x6bd8, 0x1f39, 0xf3aa, 0x874b, 0xbd6c, 0xc98d, 0x251e, 0x51ff },
{/*8*/ 0, 0x15c1, 0x2a42, 0x3f83, 0xcef4, 0xdb35, 0xe4b6, 0xf177,
0x4758, 0x5299, 0x6d1a, 0x78db, 0x89ac, 0x9c6d, 0xa3ee, 0xb62f },
{/*9*/ 0, 0x3d01, 0x1602, 0x2b03, 0x8504, 0xb805, 0x9306, 0xae07,
0xca08, 0xf709, 0xdc0a, 0xe10b, 0x4f0c, 0x720d, 0x590e, 0x640f },
{/*a*/ 0, 0x9801, 0xec02, 0x7403, 0x6b04, 0xf305, 0x8706, 0x1f07,
0xbd08, 0x2509, 0x510a, 0xc90b, 0xd60c, 0x4e0d, 0x3a0e, 0xa20f },
{/*b*/ 0, 0xd131, 0x6212, 0xb323, 0x3884, 0xe9b5, 0x5a96, 0x8ba7,
0x1cc8, 0xcdf9, 0x7eda, 0xafeb, 0x244c, 0xf57d, 0x465e, 0x976f },
{/*c*/ 0, 0xe1d1, 0x7262, 0x93b3, 0xb834, 0x59e5, 0xca56, 0x2b87,
0xdc18, 0x3dc9, 0xae7a, 0x4fab, 0x542c, 0x85fd, 0x164e, 0xf79f },
{/*d*/ 0, 0x6051, 0xb0a2, 0xd0f3, 0x1094, 0x70c5, 0xa036, 0xc067,
0x20e8, 0x40b9, 0x904a, 0x601b, 0x307c, 0x502d, 0x80de, 0xe08f },
{/*e*/ 0, 0xa4c1, 0xf842, 0x5c83, 0xe6f4, 0x4235, 0x1eb6, 0xba77,
0x7b58, 0xdf99, 0x831a, 0x27db, 0x9dac, 0x396d, 0x65ee, 0xc12f },
{/*f*/ 0, 0x11c1, 0x2242, 0x3383, 0xc8f4, 0xd935, 0xeab6, 0xfb77,
0x4c58, 0x5d99, 0x6e1a, 0x7fdb, 0x84ac, 0x956d, 0xa6ee, 0xb72f },
/* Channel 1 syndromes */
{/*10*/ 1, 0x45d1, 0x8a62, 0xcfb3, 0x5e34, 0x1be5, 0xd456, 0x9187,
0xa718, 0xe2c9, 0x2d7a, 0x68ab, 0xf92c, 0xbcfd, 0x734e, 0x369f },
{/*11*/ 1, 0x63e1, 0xb172, 0xd293, 0x14b4, 0x7755, 0xa5c6, 0xc627,
0x28d8, 0x4b39, 0x99aa, 0xfa4b, 0x3c6c, 0x5f8d, 0x8d1e, 0xeeff },
{/*12*/ 1, 0xb741, 0xd982, 0x6ec3, 0x2254, 0x9515, 0xfbd6, 0x4c97,
0x33a8, 0x84e9, 0xea2a, 0x5d6b, 0x11fc, 0xa6bd, 0xc87e, 0x7f3f },
{/*13*/ 1, 0xdd41, 0x6682, 0xbbc3, 0x3554, 0xe815, 0x53d6, 0xce97,
0x1aa8, 0xc7e9, 0x7c2a, 0xa1fb, 0x2ffc, 0xf2bd, 0x497e, 0x943f },
{/*14*/ 1, 0x2bd1, 0x3d62, 0x16b3, 0x4f34, 0x64e5, 0x7256, 0x5987,
0x8518, 0xaec9, 0xb87a, 0x93ab, 0xca2c, 0xe1fd, 0xf74e, 0xdc9f },
{/*15*/ 1, 0x83c1, 0xc142, 0x4283, 0xa4f4, 0x2735, 0x65b6, 0xe677,
0xf858, 0x7b99, 0x391a, 0xbadb, 0x5cac, 0xdf6d, 0x9dee, 0x1e2f },
{/*16*/ 1, 0x8fd1, 0xc562, 0x4ab3, 0xa934, 0x26e5, 0x6c56, 0xe387,
0xfe18, 0x71c9, 0x3b7a, 0xb4ab, 0x572c, 0xd8fd, 0x924e, 0x1d9f },
{/*17*/ 1, 0x4791, 0x89e2, 0xce73, 0x5264, 0x15f5, 0xdb86, 0x9c17,
0xa3b8, 0xe429, 0x2a5a, 0x6dcb, 0xf1dc, 0xb64d, 0x783e, 0x3faf },
{/*18*/ 1, 0x5781, 0xa9c2, 0xfe43, 0x92a4, 0xc525, 0x3b66, 0x6ce7,
0xe3f8, 0xb479, 0x4a3a, 0x1dbb, 0x715c, 0x26dd, 0xd89e, 0x8f1f },
{/*19*/ 1, 0xbf41, 0xd582, 0x6ac3, 0x2954, 0x9615, 0xfcd6, 0x4397,
0x3ea8, 0x81e9, 0xeb2a, 0x546b, 0x17fc, 0xa8bd, 0xc27e, 0x7d3f },
{/*1a*/ 1, 0x9891, 0xe1e2, 0x7273, 0x6464, 0xf7f5, 0x8586, 0x1617,
0xb8b8, 0x2b29, 0x595a, 0xcacb, 0xdcdc, 0x4f4d, 0x3d3e, 0xaeaf },
{/*1b*/ 1, 0xcce1, 0x4472, 0x8893, 0xfdb4, 0x3f55, 0xb9c6, 0x7527,
0x56d8, 0x9a39, 0x12aa, 0xde4b, 0xab6c, 0x678d, 0xef1e, 0x23ff },
{/*1c*/ 1, 0xa761, 0xf9b2, 0x5ed3, 0xe214, 0x4575, 0x1ba6, 0xbcc7,
0x7328, 0xd449, 0x8a9a, 0x2dfb, 0x913c, 0x365d, 0x688e, 0xcfef },
{/*1d*/ 1, 0xff61, 0x55b2, 0xaad3, 0x7914, 0x8675, 0x2ca6, 0xd3c7,
0x9e28, 0x6149, 0xcb9a, 0x34fb, 0xe73c, 0x185d, 0xb28e, 0x4def },
{/*1e*/ 1, 0x5451, 0xa8a2, 0xfcf3, 0x9694, 0xc2c5, 0x3e36, 0x6a67,
0xebe8, 0xbfb9, 0x434a, 0x171b, 0x7d7c, 0x292d, 0xd5de, 0x818f },
{/*1f*/ 1, 0x6fc1, 0xb542, 0xda83, 0x19f4, 0x7635, 0xacb6, 0xc377,
0x2e58, 0x4199, 0x9b1a, 0xf4db, 0x37ac, 0x586d, 0x82ee, 0xed2f },
/* ECC bits are also in the set of tokens and they too can go bad
* first 2 cover channel 0, while the second 2 cover channel 1
*/
{/*20*/ 0, 0xbe01, 0xd702, 0x6903, 0x2104, 0x9f05, 0xf606, 0x4807,
0x3208, 0x8c09, 0xe50a, 0x5b0b, 0x130c, 0xad0d, 0xc40e, 0x7a0f },
{/*21*/ 0, 0x4101, 0x8202, 0xc303, 0x5804, 0x1905, 0xda06, 0x9b07,
0xac08, 0xed09, 0x2e0a, 0x6f0b, 0x640c, 0xb50d, 0x760e, 0x370f },
{/*22*/ 1, 0xc441, 0x4882, 0x8cc3, 0xf654, 0x3215, 0xbed6, 0x7a97,
0x5ba8, 0x9fe9, 0x132a, 0xd76b, 0xadfc, 0x69bd, 0xe57e, 0x213f },
{/*23*/ 1, 0x7621, 0x9b32, 0xed13, 0xda44, 0xac65, 0x4176, 0x3757,
0x6f88, 0x19a9, 0xf4ba, 0x829b, 0xb5cc, 0xc3ed, 0x2efe, 0x58df }
};
/*
* Given the syndrome argument, scan each of the channel tables for a syndrome
* match. Depending on which table it is found, return the channel number.
*/
static int get_channel_from_ecc_syndrome(unsigned short syndrome)
{
int row;
int column;
/* Determine column to scan */
column = syndrome & 0xF;
/* Scan all rows, looking for syndrome, or end of table */
for (row = 0; row < NUMBER_ECC_ROWS; row++) {
if (ecc_chipkill_syndromes[row][column] == syndrome)
return ecc_chipkill_syndromes[row][0];
}
debugf0("syndrome(%x) not found\n", syndrome);
return -1;
}
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