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sparc64: Commonize large portions of PSYCHO error handling.

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The IOMMU and streaming cache error interrogation is moved here
as well as the PCI error interrupt handler.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2008-09-10 03:52:51 -07:00
parent 1c03a55cdf
commit e6e003720f
4 changed files with 369 additions and 579 deletions
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361
arch/sparc64/kernel/pci_psycho.c
View file

@ -98,9 +98,6 @@ static void *psycho_pci_config_mkaddr(struct pci_pbm_info *pbm,
}
/* PSYCHO error handling support. */
enum psycho_error_type {
UE_ERR, CE_ERR, PCI_ERR
};
/* Helper function of IOMMU error checking, which checks out
* the state of the streaming buffers. The IOMMU lock is
@ -125,112 +122,10 @@ enum psycho_error_type {
#define PSYCHO_STC_DATA_B 0xc000UL
#define PSYCHO_STC_ERR_A 0xb400UL
#define PSYCHO_STC_ERR_B 0xc400UL
#define PSYCHO_STCERR_WRITE 0x0000000000000002UL /* Write Error */
#define PSYCHO_STCERR_READ 0x0000000000000001UL /* Read Error */
#define PSYCHO_STC_TAG_A 0xb800UL
#define PSYCHO_STC_TAG_B 0xc800UL
#define PSYCHO_STCTAG_PPN 0x0fffffff00000000UL /* Physical Page Number */
#define PSYCHO_STCTAG_VPN 0x00000000ffffe000UL /* Virtual Page Number */
#define PSYCHO_STCTAG_VALID 0x0000000000000002UL /* Valid */
#define PSYCHO_STCTAG_WRITE 0x0000000000000001UL /* Writable */
#define PSYCHO_STC_LINE_A 0xb900UL
#define PSYCHO_STC_LINE_B 0xc900UL
#define PSYCHO_STCLINE_LINDX 0x0000000001e00000UL /* LRU Index */
#define PSYCHO_STCLINE_SPTR 0x00000000001f8000UL /* Dirty Data Start Pointer */
#define PSYCHO_STCLINE_LADDR 0x0000000000007f00UL /* Line Address */
#define PSYCHO_STCLINE_EPTR 0x00000000000000fcUL /* Dirty Data End Pointer */
#define PSYCHO_STCLINE_VALID 0x0000000000000002UL /* Valid */
#define PSYCHO_STCLINE_FOFN 0x0000000000000001UL /* Fetch Outstanding / Flush Necessary */
static DEFINE_SPINLOCK(stc_buf_lock);
static unsigned long stc_error_buf[128];
static unsigned long stc_tag_buf[16];
static unsigned long stc_line_buf[16];
static void psycho_check_stc_error(struct pci_pbm_info *pbm)
{
struct strbuf *strbuf = &pbm->stc;
unsigned long err_base, tag_base, line_base;
u64 control;
int i;
err_base = strbuf->strbuf_err_stat;
tag_base = strbuf->strbuf_tag_diag;
line_base = strbuf->strbuf_line_diag;
spin_lock(&stc_buf_lock);
/* This is __REALLY__ dangerous. When we put the
* streaming buffer into diagnostic mode to probe
* it's tags and error status, we _must_ clear all
* of the line tag valid bits before re-enabling
* the streaming buffer. If any dirty data lives
* in the STC when we do this, we will end up
* invalidating it before it has a chance to reach
* main memory.
*/
control = psycho_read(strbuf->strbuf_control);
psycho_write(strbuf->strbuf_control,
(control | PSYCHO_STRBUF_CTRL_DENAB));
for (i = 0; i < 128; i++) {
unsigned long val;
val = psycho_read(err_base + (i * 8UL));
psycho_write(err_base + (i * 8UL), 0UL);
stc_error_buf[i] = val;
}
for (i = 0; i < 16; i++) {
stc_tag_buf[i] = psycho_read(tag_base + (i * 8UL));
stc_line_buf[i] = psycho_read(line_base + (i * 8UL));
psycho_write(tag_base + (i * 8UL), 0UL);
psycho_write(line_base + (i * 8UL), 0UL);
}
/* OK, state is logged, exit diagnostic mode. */
psycho_write(strbuf->strbuf_control, control);
for (i = 0; i < 16; i++) {
int j, saw_error, first, last;
saw_error = 0;
first = i * 8;
last = first + 8;
for (j = first; j < last; j++) {
unsigned long errval = stc_error_buf[j];
if (errval != 0) {
saw_error++;
printk("%s: STC_ERR(%d)[wr(%d)rd(%d)]\n",
pbm->name,
j,
(errval & PSYCHO_STCERR_WRITE) ? 1 : 0,
(errval & PSYCHO_STCERR_READ) ? 1 : 0);
}
}
if (saw_error != 0) {
unsigned long tagval = stc_tag_buf[i];
unsigned long lineval = stc_line_buf[i];
printk("%s: STC_TAG(%d)[PA(%016lx)VA(%08lx)V(%d)W(%d)]\n",
pbm->name,
i,
((tagval & PSYCHO_STCTAG_PPN) >> 19UL),
(tagval & PSYCHO_STCTAG_VPN),
((tagval & PSYCHO_STCTAG_VALID) ? 1 : 0),
((tagval & PSYCHO_STCTAG_WRITE) ? 1 : 0));
printk("%s: STC_LINE(%d)[LIDX(%lx)SP(%lx)LADDR(%lx)EP(%lx)"
"V(%d)FOFN(%d)]\n",
pbm->name,
i,
((lineval & PSYCHO_STCLINE_LINDX) >> 21UL),
((lineval & PSYCHO_STCLINE_SPTR) >> 15UL),
((lineval & PSYCHO_STCLINE_LADDR) >> 8UL),
((lineval & PSYCHO_STCLINE_EPTR) >> 2UL),
((lineval & PSYCHO_STCLINE_VALID) ? 1 : 0),
((lineval & PSYCHO_STCLINE_FOFN) ? 1 : 0));
}
}
spin_unlock(&stc_buf_lock);
}
/* When an Uncorrectable Error or a PCI Error happens, we
* interrogate the IOMMU state to see if it is the cause.
@ -257,122 +152,7 @@ static void psycho_check_stc_error(struct pci_pbm_info *pbm)
#define PSYCHO_IOMMU_TSBBASE 0x0208UL
#define PSYCHO_IOMMU_FLUSH 0x0210UL
#define PSYCHO_IOMMU_TAG 0xa580UL
#define PSYCHO_IOMMU_TAG_ERRSTS (0x3UL << 23UL)
#define PSYCHO_IOMMU_TAG_ERR (0x1UL << 22UL)
#define PSYCHO_IOMMU_TAG_WRITE (0x1UL << 21UL)
#define PSYCHO_IOMMU_TAG_STREAM (0x1UL << 20UL)
#define PSYCHO_IOMMU_TAG_SIZE (0x1UL << 19UL)
#define PSYCHO_IOMMU_TAG_VPAGE 0x7ffffUL
#define PSYCHO_IOMMU_DATA 0xa600UL
#define PSYCHO_IOMMU_DATA_VALID (1UL << 30UL)
#define PSYCHO_IOMMU_DATA_CACHE (1UL << 28UL)
#define PSYCHO_IOMMU_DATA_PPAGE 0xfffffffUL
static void psycho_check_iommu_error(struct pci_pbm_info *pbm,
unsigned long afsr,
unsigned long afar,
enum psycho_error_type type)
{
struct iommu *iommu = pbm->iommu;
unsigned long iommu_tag[16];
unsigned long iommu_data[16];
unsigned long flags;
u64 control;
int i;
spin_lock_irqsave(&iommu->lock, flags);
control = psycho_read(iommu->iommu_control);
if (control & PSYCHO_IOMMU_CTRL_XLTEERR) {
char *type_string;
/* Clear the error encountered bit. */
control &= ~PSYCHO_IOMMU_CTRL_XLTEERR;
psycho_write(iommu->iommu_control, control);
switch((control & PSYCHO_IOMMU_CTRL_XLTESTAT) >> 25UL) {
case 0:
type_string = "Protection Error";
break;
case 1:
type_string = "Invalid Error";
break;
case 2:
type_string = "TimeOut Error";
break;
case 3:
default:
type_string = "ECC Error";
break;
};
printk("%s: IOMMU Error, type[%s]\n",
pbm->name, type_string);
/* Put the IOMMU into diagnostic mode and probe
* it's TLB for entries with error status.
*
* It is very possible for another DVMA to occur
* while we do this probe, and corrupt the system
* further. But we are so screwed at this point
* that we are likely to crash hard anyways, so
* get as much diagnostic information to the
* console as we can.
*/
psycho_write(iommu->iommu_control,
control | PSYCHO_IOMMU_CTRL_DENAB);
for (i = 0; i < 16; i++) {
unsigned long base = pbm->controller_regs;
iommu_tag[i] =
psycho_read(base + PSYCHO_IOMMU_TAG + (i * 8UL));
iommu_data[i] =
psycho_read(base + PSYCHO_IOMMU_DATA + (i * 8UL));
/* Now clear out the entry. */
psycho_write(base + PSYCHO_IOMMU_TAG + (i * 8UL), 0);
psycho_write(base + PSYCHO_IOMMU_DATA + (i * 8UL), 0);
}
/* Leave diagnostic mode. */
psycho_write(iommu->iommu_control, control);
for (i = 0; i < 16; i++) {
unsigned long tag, data;
tag = iommu_tag[i];
if (!(tag & PSYCHO_IOMMU_TAG_ERR))
continue;
data = iommu_data[i];
switch((tag & PSYCHO_IOMMU_TAG_ERRSTS) >> 23UL) {
case 0:
type_string = "Protection Error";
break;
case 1:
type_string = "Invalid Error";
break;
case 2:
type_string = "TimeOut Error";
break;
case 3:
default:
type_string = "ECC Error";
break;
};
printk("%s: IOMMU TAG(%d)[error(%s) wr(%d) str(%d) sz(%dK) vpg(%08lx)]\n",
pbm->name, i, type_string,
((tag & PSYCHO_IOMMU_TAG_WRITE) ? 1 : 0),
((tag & PSYCHO_IOMMU_TAG_STREAM) ? 1 : 0),
((tag & PSYCHO_IOMMU_TAG_SIZE) ? 64 : 8),
(tag & PSYCHO_IOMMU_TAG_VPAGE) << IOMMU_PAGE_SHIFT);
printk("%s: IOMMU DATA(%d)[valid(%d) cache(%d) ppg(%016lx)]\n",
pbm->name, i,
((data & PSYCHO_IOMMU_DATA_VALID) ? 1 : 0),
((data & PSYCHO_IOMMU_DATA_CACHE) ? 1 : 0),
(data & PSYCHO_IOMMU_DATA_PPAGE) << IOMMU_PAGE_SHIFT);
}
}
psycho_check_stc_error(pbm);
spin_unlock_irqrestore(&iommu->lock, flags);
}
/* Uncorrectable Errors. Cause of the error and the address are
* recorded in the UE_AFSR and UE_AFAR of PSYCHO. They are errors
@ -540,150 +320,9 @@ static irqreturn_t psycho_ce_intr(int irq, void *dev_id)
*/
#define PSYCHO_PCI_AFSR_A 0x2010UL
#define PSYCHO_PCI_AFSR_B 0x4010UL
#define PSYCHO_PCIAFSR_PMA 0x8000000000000000UL /* Primary Master Abort Error */
#define PSYCHO_PCIAFSR_PTA 0x4000000000000000UL /* Primary Target Abort Error */
#define PSYCHO_PCIAFSR_PRTRY 0x2000000000000000UL /* Primary Excessive Retries */
#define PSYCHO_PCIAFSR_PPERR 0x1000000000000000UL /* Primary Parity Error */
#define PSYCHO_PCIAFSR_SMA 0x0800000000000000UL /* Secondary Master Abort Error */
#define PSYCHO_PCIAFSR_STA 0x0400000000000000UL /* Secondary Target Abort Error */
#define PSYCHO_PCIAFSR_SRTRY 0x0200000000000000UL /* Secondary Excessive Retries */
#define PSYCHO_PCIAFSR_SPERR 0x0100000000000000UL /* Secondary Parity Error */
#define PSYCHO_PCIAFSR_RESV1 0x00ff000000000000UL /* Reserved */
#define PSYCHO_PCIAFSR_BMSK 0x0000ffff00000000UL /* Bytemask of failed transfer */
#define PSYCHO_PCIAFSR_BLK 0x0000000080000000UL /* Trans was block operation */
#define PSYCHO_PCIAFSR_RESV2 0x0000000040000000UL /* Reserved */
#define PSYCHO_PCIAFSR_MID 0x000000003e000000UL /* MID causing the error */
#define PSYCHO_PCIAFSR_RESV3 0x0000000001ffffffUL /* Reserved */
#define PSYCHO_PCI_AFAR_A 0x2018UL
#define PSYCHO_PCI_AFAR_B 0x4018UL
static irqreturn_t psycho_pcierr_intr_other(struct pci_pbm_info *pbm)
{
unsigned long csr, csr_error_bits;
irqreturn_t ret = IRQ_NONE;
u16 stat;
csr = psycho_read(pbm->pci_csr);
csr_error_bits =
csr & (PSYCHO_PCICTRL_SBH_ERR | PSYCHO_PCICTRL_SERR);
if (csr_error_bits) {
/* Clear the errors. */
psycho_write(pbm->pci_csr, csr);
/* Log 'em. */
if (csr_error_bits & PSYCHO_PCICTRL_SBH_ERR)
printk("%s: PCI streaming byte hole error asserted.\n",
pbm->name);
if (csr_error_bits & PSYCHO_PCICTRL_SERR)
printk("%s: PCI SERR signal asserted.\n", pbm->name);
ret = IRQ_HANDLED;
}
pci_read_config_word(pbm->pci_bus->self, PCI_STATUS, &stat);
if (stat & (PCI_STATUS_PARITY |
PCI_STATUS_SIG_TARGET_ABORT |
PCI_STATUS_REC_TARGET_ABORT |
PCI_STATUS_REC_MASTER_ABORT |
PCI_STATUS_SIG_SYSTEM_ERROR)) {
printk("%s: PCI bus error, PCI_STATUS[%04x]\n",
pbm->name, stat);
pci_write_config_word(pbm->pci_bus->self, PCI_STATUS, 0xffff);
ret = IRQ_HANDLED;
}
return ret;
}
static irqreturn_t psycho_pcierr_intr(int irq, void *dev_id)
{
struct pci_pbm_info *pbm = dev_id;
unsigned long afsr_reg, afar_reg;
unsigned long afsr, afar, error_bits;
int reported;
afsr_reg = pbm->pci_afsr;
afar_reg = pbm->pci_afar;
/* Latch error status. */
afar = psycho_read(afar_reg);
afsr = psycho_read(afsr_reg);
/* Clear primary/secondary error status bits. */
error_bits = afsr &
(PSYCHO_PCIAFSR_PMA | PSYCHO_PCIAFSR_PTA |
PSYCHO_PCIAFSR_PRTRY | PSYCHO_PCIAFSR_PPERR |
PSYCHO_PCIAFSR_SMA | PSYCHO_PCIAFSR_STA |
PSYCHO_PCIAFSR_SRTRY | PSYCHO_PCIAFSR_SPERR);
if (!error_bits)
return psycho_pcierr_intr_other(pbm);
psycho_write(afsr_reg, error_bits);
/* Log the error. */
printk("%s: PCI Error, primary error type[%s]\n",
pbm->name,
(((error_bits & PSYCHO_PCIAFSR_PMA) ?
"Master Abort" :
((error_bits & PSYCHO_PCIAFSR_PTA) ?
"Target Abort" :
((error_bits & PSYCHO_PCIAFSR_PRTRY) ?
"Excessive Retries" :
((error_bits & PSYCHO_PCIAFSR_PPERR) ?
"Parity Error" : "???"))))));
printk("%s: bytemask[%04lx] UPA_MID[%02lx] was_block(%d)\n",
pbm->name,
(afsr & PSYCHO_PCIAFSR_BMSK) >> 32UL,
(afsr & PSYCHO_PCIAFSR_MID) >> 25UL,
(afsr & PSYCHO_PCIAFSR_BLK) ? 1 : 0);
printk("%s: PCI AFAR [%016lx]\n", pbm->name, afar);
printk("%s: PCI Secondary errors [", pbm->name);
reported = 0;
if (afsr & PSYCHO_PCIAFSR_SMA) {
reported++;
printk("(Master Abort)");
}
if (afsr & PSYCHO_PCIAFSR_STA) {
reported++;
printk("(Target Abort)");
}
if (afsr & PSYCHO_PCIAFSR_SRTRY) {
reported++;
printk("(Excessive Retries)");
}
if (afsr & PSYCHO_PCIAFSR_SPERR) {
reported++;
printk("(Parity Error)");
}
if (!reported)
printk("(none)");
printk("]\n");
/* For the error types shown, scan PBM's PCI bus for devices
* which have logged that error type.
*/
/* If we see a Target Abort, this could be the result of an
* IOMMU translation error of some sort. It is extremely
* useful to log this information as usually it indicates
* a bug in the IOMMU support code or a PCI device driver.
*/
if (error_bits & (PSYCHO_PCIAFSR_PTA | PSYCHO_PCIAFSR_STA)) {
psycho_check_iommu_error(pbm, afsr, afar, PCI_ERR);
pci_scan_for_target_abort(pbm, pbm->pci_bus);
}
if (error_bits & (PSYCHO_PCIAFSR_PMA | PSYCHO_PCIAFSR_SMA))
pci_scan_for_master_abort(pbm, pbm->pci_bus);
/* For excessive retries, PSYCHO/PBM will abort the device
* and there is no way to specifically check for excessive
* retries in the config space status registers. So what
* we hope is that we'll catch it via the master/target
* abort events.
*/
if (error_bits & (PSYCHO_PCIAFSR_PPERR | PSYCHO_PCIAFSR_SPERR))
pci_scan_for_parity_error(pbm, pbm->pci_bus);
return IRQ_HANDLED;
}
/* XXX What about PowerFail/PowerManagement??? -DaveM */
#define PSYCHO_ECC_CTRL 0x0020
#define PSYCHO_ECCCTRL_EE 0x8000000000000000UL /* Enable ECC Checking */

223
arch/sparc64/kernel/pci_sabre.c
View file

@ -210,95 +210,6 @@
static int hummingbird_p;
static struct pci_bus *sabre_root_bus;
/* SABRE error handling support. */
static void sabre_check_iommu_error(struct pci_pbm_info *pbm,
unsigned long afsr,
unsigned long afar)
{
struct iommu *iommu = pbm->iommu;
unsigned long iommu_tag[16];
unsigned long iommu_data[16];
unsigned long flags;
u64 control;
int i;
spin_lock_irqsave(&iommu->lock, flags);
control = sabre_read(iommu->iommu_control);
if (control & SABRE_IOMMUCTRL_ERR) {
char *type_string;
/* Clear the error encountered bit.
* NOTE: On Sabre this is write 1 to clear,
* which is different from Psycho.
*/
sabre_write(iommu->iommu_control, control);
switch((control & SABRE_IOMMUCTRL_ERRSTS) >> 25UL) {
case 1:
type_string = "Invalid Error";
break;
case 3:
type_string = "ECC Error";
break;
default:
type_string = "Unknown";
break;
};
printk("%s: IOMMU Error, type[%s]\n",
pbm->name, type_string);
/* Enter diagnostic mode and probe for error'd
* entries in the IOTLB.
*/
control &= ~(SABRE_IOMMUCTRL_ERRSTS | SABRE_IOMMUCTRL_ERR);
sabre_write(iommu->iommu_control,
(control | SABRE_IOMMUCTRL_DENAB));
for (i = 0; i < 16; i++) {
unsigned long base = pbm->controller_regs;
iommu_tag[i] =
sabre_read(base + SABRE_IOMMU_TAG + (i * 8UL));
iommu_data[i] =
sabre_read(base + SABRE_IOMMU_DATA + (i * 8UL));
sabre_write(base + SABRE_IOMMU_TAG + (i * 8UL), 0);
sabre_write(base + SABRE_IOMMU_DATA + (i * 8UL), 0);
}
sabre_write(iommu->iommu_control, control);
for (i = 0; i < 16; i++) {
unsigned long tag, data;
tag = iommu_tag[i];
if (!(tag & SABRE_IOMMUTAG_ERR))
continue;
data = iommu_data[i];
switch((tag & SABRE_IOMMUTAG_ERRSTS) >> 23UL) {
case 1:
type_string = "Invalid Error";
break;
case 3:
type_string = "ECC Error";
break;
default:
type_string = "Unknown";
break;
};
printk("%s: IOMMU TAG(%d)[RAW(%016lx)error(%s)wr(%d)sz(%dK)vpg(%08lx)]\n",
pbm->name, i, tag, type_string,
((tag & SABRE_IOMMUTAG_WRITE) ? 1 : 0),
((tag & SABRE_IOMMUTAG_SIZE) ? 64 : 8),
((tag & SABRE_IOMMUTAG_VPN) << IOMMU_PAGE_SHIFT));
printk("%s: IOMMU DATA(%d)[RAW(%016lx)valid(%d)used(%d)cache(%d)ppg(%016lx)\n",
pbm->name, i, data,
((data & SABRE_IOMMUDATA_VALID) ? 1 : 0),
((data & SABRE_IOMMUDATA_USED) ? 1 : 0),
((data & SABRE_IOMMUDATA_CACHE) ? 1 : 0),
((data & SABRE_IOMMUDATA_PPN) << IOMMU_PAGE_SHIFT));
}
}
spin_unlock_irqrestore(&iommu->lock, flags);
}
static irqreturn_t sabre_ue_intr(int irq, void *dev_id)
{
struct pci_pbm_info *pbm = dev_id;
@ -354,7 +265,7 @@ static irqreturn_t sabre_ue_intr(int irq, void *dev_id)
printk("]\n");
/* Interrogate IOMMU for error status. */
sabre_check_iommu_error(pbm, afsr, afar);
psycho_check_iommu_error(pbm, afsr, afar, UE_ERR);
return IRQ_HANDLED;
}
@ -415,133 +326,6 @@ static irqreturn_t sabre_ce_intr(int irq, void *dev_id)
return IRQ_HANDLED;
}
static irqreturn_t sabre_pcierr_intr_other(struct pci_pbm_info *pbm)
{
unsigned long csr_reg, csr, csr_error_bits;
irqreturn_t ret = IRQ_NONE;
u16 stat;
csr_reg = pbm->controller_regs + SABRE_PCICTRL;
csr = sabre_read(csr_reg);
csr_error_bits =
csr & SABRE_PCICTRL_SERR;
if (csr_error_bits) {
/* Clear the errors. */
sabre_write(csr_reg, csr);
/* Log 'em. */
if (csr_error_bits & SABRE_PCICTRL_SERR)
printk("%s: PCI SERR signal asserted.\n",
pbm->name);
ret = IRQ_HANDLED;
}
pci_bus_read_config_word(sabre_root_bus, 0,
PCI_STATUS, &stat);
if (stat & (PCI_STATUS_PARITY |
PCI_STATUS_SIG_TARGET_ABORT |
PCI_STATUS_REC_TARGET_ABORT |
PCI_STATUS_REC_MASTER_ABORT |
PCI_STATUS_SIG_SYSTEM_ERROR)) {
printk("%s: PCI bus error, PCI_STATUS[%04x]\n",
pbm->name, stat);
pci_bus_write_config_word(sabre_root_bus, 0,
PCI_STATUS, 0xffff);
ret = IRQ_HANDLED;
}
return ret;
}
static irqreturn_t sabre_pcierr_intr(int irq, void *dev_id)
{
struct pci_pbm_info *pbm = dev_id;
unsigned long afsr_reg, afar_reg;
unsigned long afsr, afar, error_bits;
int reported;
afsr_reg = pbm->controller_regs + SABRE_PIOAFSR;
afar_reg = pbm->controller_regs + SABRE_PIOAFAR;
/* Latch error status. */
afar = sabre_read(afar_reg);
afsr = sabre_read(afsr_reg);
/* Clear primary/secondary error status bits. */
error_bits = afsr &
(SABRE_PIOAFSR_PMA | SABRE_PIOAFSR_PTA |
SABRE_PIOAFSR_PRTRY | SABRE_PIOAFSR_PPERR |
SABRE_PIOAFSR_SMA | SABRE_PIOAFSR_STA |
SABRE_PIOAFSR_SRTRY | SABRE_PIOAFSR_SPERR);
if (!error_bits)
return sabre_pcierr_intr_other(pbm);
sabre_write(afsr_reg, error_bits);
/* Log the error. */
printk("%s: PCI Error, primary error type[%s]\n",
pbm->name,
(((error_bits & SABRE_PIOAFSR_PMA) ?
"Master Abort" :
((error_bits & SABRE_PIOAFSR_PTA) ?
"Target Abort" :
((error_bits & SABRE_PIOAFSR_PRTRY) ?
"Excessive Retries" :
((error_bits & SABRE_PIOAFSR_PPERR) ?
"Parity Error" : "???"))))));
printk("%s: bytemask[%04lx] was_block(%d)\n",
pbm->name,
(afsr & SABRE_PIOAFSR_BMSK) >> 32UL,
(afsr & SABRE_PIOAFSR_BLK) ? 1 : 0);
printk("%s: PCI AFAR [%016lx]\n", pbm->name, afar);
printk("%s: PCI Secondary errors [", pbm->name);
reported = 0;
if (afsr & SABRE_PIOAFSR_SMA) {
reported++;
printk("(Master Abort)");
}
if (afsr & SABRE_PIOAFSR_STA) {
reported++;
printk("(Target Abort)");
}
if (afsr & SABRE_PIOAFSR_SRTRY) {
reported++;
printk("(Excessive Retries)");
}
if (afsr & SABRE_PIOAFSR_SPERR) {
reported++;
printk("(Parity Error)");
}
if (!reported)
printk("(none)");
printk("]\n");
/* For the error types shown, scan both PCI buses for devices
* which have logged that error type.
*/
/* If we see a Target Abort, this could be the result of an
* IOMMU translation error of some sort. It is extremely
* useful to log this information as usually it indicates
* a bug in the IOMMU support code or a PCI device driver.
*/
if (error_bits & (SABRE_PIOAFSR_PTA | SABRE_PIOAFSR_STA)) {
sabre_check_iommu_error(pbm, afsr, afar);
pci_scan_for_target_abort(pbm, pbm->pci_bus);
}
if (error_bits & (SABRE_PIOAFSR_PMA | SABRE_PIOAFSR_SMA))
pci_scan_for_master_abort(pbm, pbm->pci_bus);
/* For excessive retries, SABRE/PBM will abort the device
* and there is no way to specifically check for excessive
* retries in the config space status registers. So what
* we hope is that we'll catch it via the master/target
* abort events.
*/
if (error_bits & (SABRE_PIOAFSR_PPERR | SABRE_PIOAFSR_SPERR))
pci_scan_for_parity_error(pbm, pbm->pci_bus);
return IRQ_HANDLED;
}
static void sabre_register_error_handlers(struct pci_pbm_info *pbm)
{
struct device_node *dp = pbm->op->node;
@ -588,7 +372,7 @@ static void sabre_register_error_handlers(struct pci_pbm_info *pbm)
if (err)
printk(KERN_WARNING "%s: Couldn't register CE, err=%d.\n",
pbm->name, err);
err = request_irq(op->irqs[0], sabre_pcierr_intr, 0,
err = request_irq(op->irqs[0], psycho_pcierr_intr, 0,
"SABRE_PCIERR", pbm);
if (err)
printk(KERN_WARNING "%s: Couldn't register PCIERR, err=%d.\n",
@ -679,6 +463,9 @@ static void __init sabre_pbm_init(struct pci_pbm_info *pbm,
struct of_device *op)
{
psycho_pbm_init_common(pbm, op, "SABRE", PBM_CHIP_TYPE_SABRE);
pbm->pci_afsr = pbm->controller_regs + SABRE_PIOAFSR;
pbm->pci_afar = pbm->controller_regs + SABRE_PIOAFAR;
pbm->pci_csr = pbm->controller_regs + SABRE_PCICTRL;
sabre_scan_bus(pbm, &op->dev);
}

353
arch/sparc64/kernel/psycho_common.c
View file

@ -3,15 +3,368 @@
* Copyright (C) 2008 David S. Miller <davem@davemloft.net>
*/
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <asm/upa.h>
#include "pci_impl.h"
#include "iommu_common.h"
#include "psycho_common.h"
#define PSYCHO_STRBUF_CTRL_DENAB 0x0000000000000002UL
#define PSYCHO_STCERR_WRITE 0x0000000000000002UL
#define PSYCHO_STCERR_READ 0x0000000000000001UL
#define PSYCHO_STCTAG_PPN 0x0fffffff00000000UL
#define PSYCHO_STCTAG_VPN 0x00000000ffffe000UL
#define PSYCHO_STCTAG_VALID 0x0000000000000002UL
#define PSYCHO_STCTAG_WRITE 0x0000000000000001UL
#define PSYCHO_STCLINE_LINDX 0x0000000001e00000UL
#define PSYCHO_STCLINE_SPTR 0x00000000001f8000UL
#define PSYCHO_STCLINE_LADDR 0x0000000000007f00UL
#define PSYCHO_STCLINE_EPTR 0x00000000000000fcUL
#define PSYCHO_STCLINE_VALID 0x0000000000000002UL
#define PSYCHO_STCLINE_FOFN 0x0000000000000001UL
static DEFINE_SPINLOCK(stc_buf_lock);
static unsigned long stc_error_buf[128];
static unsigned long stc_tag_buf[16];
static unsigned long stc_line_buf[16];
static void psycho_check_stc_error(struct pci_pbm_info *pbm)
{
unsigned long err_base, tag_base, line_base;
struct strbuf *strbuf = &pbm->stc;
u64 control;
int i;
if (!strbuf->strbuf_control)
return;
err_base = strbuf->strbuf_err_stat;
tag_base = strbuf->strbuf_tag_diag;
line_base = strbuf->strbuf_line_diag;
spin_lock(&stc_buf_lock);
/* This is __REALLY__ dangerous. When we put the streaming
* buffer into diagnostic mode to probe it's tags and error
* status, we _must_ clear all of the line tag valid bits
* before re-enabling the streaming buffer. If any dirty data
* lives in the STC when we do this, we will end up
* invalidating it before it has a chance to reach main
* memory.
*/
control = upa_readq(strbuf->strbuf_control);
upa_writeq(control | PSYCHO_STRBUF_CTRL_DENAB, strbuf->strbuf_control);
for (i = 0; i < 128; i++) {
u64 val;
val = upa_readq(err_base + (i * 8UL));
upa_writeq(0UL, err_base + (i * 8UL));
stc_error_buf[i] = val;
}
for (i = 0; i < 16; i++) {
stc_tag_buf[i] = upa_readq(tag_base + (i * 8UL));
stc_line_buf[i] = upa_readq(line_base + (i * 8UL));
upa_writeq(0UL, tag_base + (i * 8UL));
upa_writeq(0UL, line_base + (i * 8UL));
}
/* OK, state is logged, exit diagnostic mode. */
upa_writeq(control, strbuf->strbuf_control);
for (i = 0; i < 16; i++) {
int j, saw_error, first, last;
saw_error = 0;
first = i * 8;
last = first + 8;
for (j = first; j < last; j++) {
u64 errval = stc_error_buf[j];
if (errval != 0) {
saw_error++;
printk(KERN_ERR "%s: STC_ERR(%d)[wr(%d)"
"rd(%d)]\n",
pbm->name,
j,
(errval & PSYCHO_STCERR_WRITE) ? 1 : 0,
(errval & PSYCHO_STCERR_READ) ? 1 : 0);
}
}
if (saw_error != 0) {
u64 tagval = stc_tag_buf[i];
u64 lineval = stc_line_buf[i];
printk(KERN_ERR "%s: STC_TAG(%d)[PA(%016lx)VA(%08lx)"
"V(%d)W(%d)]\n",
pbm->name,
i,
((tagval & PSYCHO_STCTAG_PPN) >> 19UL),
(tagval & PSYCHO_STCTAG_VPN),
((tagval & PSYCHO_STCTAG_VALID) ? 1 : 0),
((tagval & PSYCHO_STCTAG_WRITE) ? 1 : 0));
printk(KERN_ERR "%s: STC_LINE(%d)[LIDX(%lx)SP(%lx)"
"LADDR(%lx)EP(%lx)V(%d)FOFN(%d)]\n",
pbm->name,
i,
((lineval & PSYCHO_STCLINE_LINDX) >> 21UL),
((lineval & PSYCHO_STCLINE_SPTR) >> 15UL),
((lineval & PSYCHO_STCLINE_LADDR) >> 8UL),
((lineval & PSYCHO_STCLINE_EPTR) >> 2UL),
((lineval & PSYCHO_STCLINE_VALID) ? 1 : 0),
((lineval & PSYCHO_STCLINE_FOFN) ? 1 : 0));
}
}
spin_unlock(&stc_buf_lock);
}
#define PSYCHO_IOMMU_TAG 0xa580UL
#define PSYCHO_IOMMU_DATA 0xa600UL
static void psycho_record_iommu_tags_and_data(struct pci_pbm_info *pbm,
u64 *tag, u64 *data)
{
int i;
for (i = 0; i < 16; i++) {
unsigned long base = pbm->controller_regs;
unsigned long off = i * 8UL;
tag[i] = upa_readq(base + PSYCHO_IOMMU_TAG+off);
data[i] = upa_readq(base + PSYCHO_IOMMU_DATA+off);
/* Now clear out the entry. */
upa_writeq(0, base + PSYCHO_IOMMU_TAG + off);
upa_writeq(0, base + PSYCHO_IOMMU_DATA + off);
}
}
#define PSYCHO_IOMMU_TAG_ERRSTS (0x3UL << 23UL)
#define PSYCHO_IOMMU_TAG_ERR (0x1UL << 22UL)
#define PSYCHO_IOMMU_TAG_WRITE (0x1UL << 21UL)
#define PSYCHO_IOMMU_TAG_STREAM (0x1UL << 20UL)
#define PSYCHO_IOMMU_TAG_SIZE (0x1UL << 19UL)
#define PSYCHO_IOMMU_TAG_VPAGE 0x7ffffUL
#define PSYCHO_IOMMU_DATA_VALID (1UL << 30UL)
#define PSYCHO_IOMMU_DATA_CACHE (1UL << 28UL)
#define PSYCHO_IOMMU_DATA_PPAGE 0xfffffffUL
static void psycho_dump_iommu_tags_and_data(struct pci_pbm_info *pbm,
u64 *tag, u64 *data)
{
int i;
for (i = 0; i < 16; i++) {
u64 tag_val, data_val;
const char *type_str;
tag_val = tag[i];
if (!(tag_val & PSYCHO_IOMMU_TAG_ERR))
continue;
data_val = data[i];
switch((tag_val & PSYCHO_IOMMU_TAG_ERRSTS) >> 23UL) {
case 0:
type_str = "Protection Error";
break;
case 1:
type_str = "Invalid Error";
break;
case 2:
type_str = "TimeOut Error";
break;
case 3:
default:
type_str = "ECC Error";
break;
}
printk(KERN_ERR "%s: IOMMU TAG(%d)[error(%s) wr(%d) "
"str(%d) sz(%dK) vpg(%08lx)]\n",
pbm->name, i, type_str,
((tag_val & PSYCHO_IOMMU_TAG_WRITE) ? 1 : 0),
((tag_val & PSYCHO_IOMMU_TAG_STREAM) ? 1 : 0),
((tag_val & PSYCHO_IOMMU_TAG_SIZE) ? 64 : 8),
(tag_val & PSYCHO_IOMMU_TAG_VPAGE) << IOMMU_PAGE_SHIFT);
printk(KERN_ERR "%s: IOMMU DATA(%d)[valid(%d) cache(%d) "
"ppg(%016lx)]\n",
pbm->name, i,
((data_val & PSYCHO_IOMMU_DATA_VALID) ? 1 : 0),
((data_val & PSYCHO_IOMMU_DATA_CACHE) ? 1 : 0),
(data_val & PSYCHO_IOMMU_DATA_PPAGE)<<IOMMU_PAGE_SHIFT);
}
}
#define PSYCHO_IOMMU_CTRL_XLTESTAT 0x0000000006000000UL
#define PSYCHO_IOMMU_CTRL_XLTEERR 0x0000000001000000UL
void psycho_check_iommu_error(struct pci_pbm_info *pbm,
unsigned long afsr,
unsigned long afar,
enum psycho_error_type type)
{
u64 control, iommu_tag[16], iommu_data[16];
struct iommu *iommu = pbm->iommu;
unsigned long flags;
spin_lock_irqsave(&iommu->lock, flags);
control = upa_readq(iommu->iommu_control);
if (control & PSYCHO_IOMMU_CTRL_XLTEERR) {
const char *type_str;
control &= ~PSYCHO_IOMMU_CTRL_XLTEERR;
upa_writeq(control, iommu->iommu_control);
switch ((control & PSYCHO_IOMMU_CTRL_XLTESTAT) >> 25UL) {
case 0:
type_str = "Protection Error";
break;
case 1:
type_str = "Invalid Error";
break;
case 2:
type_str = "TimeOut Error";
break;
case 3:
default:
type_str = "ECC Error";
break;
};
printk(KERN_ERR "%s: IOMMU Error, type[%s]\n",
pbm->name, type_str);
/* It is very possible for another DVMA to occur while
* we do this probe, and corrupt the system further.
* But we are so screwed at this point that we are
* likely to crash hard anyways, so get as much
* diagnostic information to the console as we can.
*/
psycho_record_iommu_tags_and_data(pbm, iommu_tag, iommu_data);
psycho_dump_iommu_tags_and_data(pbm, iommu_tag, iommu_data);
}
psycho_check_stc_error(pbm);
spin_unlock_irqrestore(&iommu->lock, flags);
}
#define PSYCHO_PCICTRL_SBH_ERR 0x0000000800000000UL
#define PSYCHO_PCICTRL_SERR 0x0000000400000000UL
static irqreturn_t psycho_pcierr_intr_other(struct pci_pbm_info *pbm)
{
irqreturn_t ret = IRQ_NONE;
u64 csr, csr_error_bits;
u16 stat;
csr = upa_readq(pbm->pci_csr);
csr_error_bits = csr & (PSYCHO_PCICTRL_SBH_ERR | PSYCHO_PCICTRL_SERR);
if (csr_error_bits) {
/* Clear the errors. */
upa_writeq(csr, pbm->pci_csr);
/* Log 'em. */
if (csr_error_bits & PSYCHO_PCICTRL_SBH_ERR)
printk(KERN_ERR "%s: PCI streaming byte hole "
"error asserted.\n", pbm->name);
if (csr_error_bits & PSYCHO_PCICTRL_SERR)
printk(KERN_ERR "%s: PCI SERR signal asserted.\n",
pbm->name);
ret = IRQ_HANDLED;
}
pci_read_config_word(pbm->pci_bus->self, PCI_STATUS, &stat);
if (stat & (PCI_STATUS_PARITY |
PCI_STATUS_SIG_TARGET_ABORT |
PCI_STATUS_REC_TARGET_ABORT |
PCI_STATUS_REC_MASTER_ABORT |
PCI_STATUS_SIG_SYSTEM_ERROR)) {
printk(KERN_ERR "%s: PCI bus error, PCI_STATUS[%04x]\n",
pbm->name, stat);
pci_write_config_word(pbm->pci_bus->self, PCI_STATUS, 0xffff);
ret = IRQ_HANDLED;
}
return ret;
}
#define PSYCHO_PCIAFSR_PMA 0x8000000000000000UL
#define PSYCHO_PCIAFSR_PTA 0x4000000000000000UL
#define PSYCHO_PCIAFSR_PRTRY 0x2000000000000000UL
#define PSYCHO_PCIAFSR_PPERR 0x1000000000000000UL
#define PSYCHO_PCIAFSR_SMA 0x0800000000000000UL
#define PSYCHO_PCIAFSR_STA 0x0400000000000000UL
#define PSYCHO_PCIAFSR_SRTRY 0x0200000000000000UL
#define PSYCHO_PCIAFSR_SPERR 0x0100000000000000UL
#define PSYCHO_PCIAFSR_RESV1 0x00ff000000000000UL
#define PSYCHO_PCIAFSR_BMSK 0x0000ffff00000000UL
#define PSYCHO_PCIAFSR_BLK 0x0000000080000000UL
#define PSYCHO_PCIAFSR_RESV2 0x0000000040000000UL
#define PSYCHO_PCIAFSR_MID 0x000000003e000000UL
#define PSYCHO_PCIAFSR_RESV3 0x0000000001ffffffUL
irqreturn_t psycho_pcierr_intr(int irq, void *dev_id)
{
struct pci_pbm_info *pbm = dev_id;
u64 afsr, afar, error_bits;
int reported;
afsr = upa_readq(pbm->pci_afsr);
afar = upa_readq(pbm->pci_afar);
error_bits = afsr &
(PSYCHO_PCIAFSR_PMA | PSYCHO_PCIAFSR_PTA |
PSYCHO_PCIAFSR_PRTRY | PSYCHO_PCIAFSR_PPERR |
PSYCHO_PCIAFSR_SMA | PSYCHO_PCIAFSR_STA |
PSYCHO_PCIAFSR_SRTRY | PSYCHO_PCIAFSR_SPERR);
if (!error_bits)
return psycho_pcierr_intr_other(pbm);
upa_writeq(error_bits, pbm->pci_afsr);
printk(KERN_ERR "%s: PCI Error, primary error type[%s]\n",
pbm->name,
(((error_bits & PSYCHO_PCIAFSR_PMA) ?
"Master Abort" :
((error_bits & PSYCHO_PCIAFSR_PTA) ?
"Target Abort" :
((error_bits & PSYCHO_PCIAFSR_PRTRY) ?
"Excessive Retries" :
((error_bits & PSYCHO_PCIAFSR_PPERR) ?
"Parity Error" : "???"))))));
printk(KERN_ERR "%s: bytemask[%04lx] UPA_MID[%02lx] was_block(%d)\n",
pbm->name,
(afsr & PSYCHO_PCIAFSR_BMSK) >> 32UL,
(afsr & PSYCHO_PCIAFSR_MID) >> 25UL,
(afsr & PSYCHO_PCIAFSR_BLK) ? 1 : 0);
printk(KERN_ERR "%s: PCI AFAR [%016lx]\n", pbm->name, afar);
printk(KERN_ERR "%s: PCI Secondary errors [", pbm->name);
reported = 0;
if (afsr & PSYCHO_PCIAFSR_SMA) {
reported++;
printk("(Master Abort)");
}
if (afsr & PSYCHO_PCIAFSR_STA) {
reported++;
printk("(Target Abort)");
}
if (afsr & PSYCHO_PCIAFSR_SRTRY) {
reported++;
printk("(Excessive Retries)");
}
if (afsr & PSYCHO_PCIAFSR_SPERR) {
reported++;
printk("(Parity Error)");
}
if (!reported)
printk("(none)");
printk("]\n");
if (error_bits & (PSYCHO_PCIAFSR_PTA | PSYCHO_PCIAFSR_STA)) {
psycho_check_iommu_error(pbm, afsr, afar, PCI_ERR);
pci_scan_for_target_abort(pbm, pbm->pci_bus);
}
if (error_bits & (PSYCHO_PCIAFSR_PMA | PSYCHO_PCIAFSR_SMA))
pci_scan_for_master_abort(pbm, pbm->pci_bus);
if (error_bits & (PSYCHO_PCIAFSR_PPERR | PSYCHO_PCIAFSR_SPERR))
pci_scan_for_parity_error(pbm, pbm->pci_bus);
return IRQ_HANDLED;
}
static void psycho_iommu_flush(struct pci_pbm_info *pbm)
{
int i;

11
arch/sparc64/kernel/psycho_common.h
View file

@ -1,6 +1,17 @@
#ifndef _PSYCHO_COMMON_H
#define _PSYCHO_COMMON_H
enum psycho_error_type {
UE_ERR, CE_ERR, PCI_ERR
};
extern void psycho_check_iommu_error(struct pci_pbm_info *pbm,
unsigned long afsr,
unsigned long afar,
enum psycho_error_type type);
extern irqreturn_t psycho_pcierr_intr(int irq, void *dev_id);
extern int psycho_iommu_init(struct pci_pbm_info *pbm, int tsbsize,
u32 dvma_offset, u32 dma_mask,
unsigned long write_complete_offset);