/* pci_psycho.c: PSYCHO/U2P specific PCI controller support.
*
* Copyright (C) 1997, 1998, 1999, 2007 David S. Miller (davem@davemloft.net)
* Copyright (C) 1998, 1999 Eddie C. Dost (ecd@skynet.be)
* Copyright (C) 1999 Jakub Jelinek (jakub@redhat.com)
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/of_device.h>
#include <asm/iommu.h>
#include <asm/irq.h>
#include <asm/starfire.h>
#include <asm/prom.h>
#include "pci_impl.h"
#include "iommu_common.h"
#include "psycho_common.h"
#define DRIVER_NAME "psycho"
#define PFX DRIVER_NAME ": "
/* All PSYCHO registers are 64-bits. The following accessor
* routines are how they are accessed. The REG parameter
* is a physical address.
*/
#define psycho_read(__reg) \
({ u64 __ret; \
__asm__ __volatile__("ldxa [%1] %2, %0" \
: "=r" (__ret) \
: "r" (__reg), "i" (ASI_PHYS_BYPASS_EC_E) \
: "memory"); \
__ret; \
})
#define psycho_write(__reg, __val) \
__asm__ __volatile__("stxa %0, [%1] %2" \
: /* no outputs */ \
: "r" (__val), "r" (__reg), \
"i" (ASI_PHYS_BYPASS_EC_E) \
: "memory")
/* Misc. PSYCHO PCI controller register offsets and definitions. */
#define PSYCHO_CONTROL 0x0010UL
#define PSYCHO_CONTROL_IMPL 0xf000000000000000UL /* Implementation of this PSYCHO*/
#define PSYCHO_CONTROL_VER 0x0f00000000000000UL /* Version of this PSYCHO */
#define PSYCHO_CONTROL_MID 0x00f8000000000000UL /* UPA Module ID of PSYCHO */
#define PSYCHO_CONTROL_IGN 0x0007c00000000000UL /* Interrupt Group Number */
#define PSYCHO_CONTROL_RESV 0x00003ffffffffff0UL /* Reserved */
#define PSYCHO_CONTROL_APCKEN 0x0000000000000008UL /* Address Parity Check Enable */
#define PSYCHO_CONTROL_APERR 0x0000000000000004UL /* Incoming System Addr Parerr */
#define PSYCHO_CONTROL_IAP 0x0000000000000002UL /* Invert UPA Parity */
#define PSYCHO_CONTROL_MODE 0x0000000000000001UL /* PSYCHO clock mode */
#define PSYCHO_PCIA_CTRL 0x2000UL
#define PSYCHO_PCIB_CTRL 0x4000UL
#define PSYCHO_PCICTRL_RESV1 0xfffffff000000000UL /* Reserved */
#define PSYCHO_PCICTRL_SBH_ERR 0x0000000800000000UL /* Streaming byte hole error */
#define PSYCHO_PCICTRL_SERR 0x0000000400000000UL /* SERR signal asserted */
#define PSYCHO_PCICTRL_SPEED 0x0000000200000000UL /* PCI speed (1 is U2P clock) */
#define PSYCHO_PCICTRL_RESV2 0x00000001ffc00000UL /* Reserved */
#define PSYCHO_PCICTRL_ARB_PARK 0x0000000000200000UL /* PCI arbitration parking */
#define PSYCHO_PCICTRL_RESV3 0x00000000001ff800UL /* Reserved */
#define PSYCHO_PCICTRL_SBH_INT 0x0000000000000400UL /* Streaming byte hole int enab */
#define PSYCHO_PCICTRL_WEN 0x0000000000000200UL /* Power Mgmt Wake Enable */
#define PSYCHO_PCICTRL_EEN 0x0000000000000100UL /* PCI Error Interrupt Enable */
#define PSYCHO_PCICTRL_RESV4 0x00000000000000c0UL /* Reserved */
#define PSYCHO_PCICTRL_AEN 0x000000000000003fUL /* PCI DVMA Arbitration Enable */
/* U2P Programmer's Manual, page 13-55, configuration space
* address format:
*
* 32 24 23 16 15 11 10 8 7 2 1 0
* ---------------------------------------------------------
* |0 0 0 0 0 0 0 0 1| bus | device | function | reg | 0 0 |
* ---------------------------------------------------------
*/
#define PSYCHO_CONFIG_BASE(PBM) \
((PBM)->config_space | (1UL << 24))
#define PSYCHO_CONFIG_ENCODE(BUS, DEVFN, REG) \
(((unsigned long)(BUS) << 16) | \
((unsigned long)(DEVFN) << 8) | \
((unsigned long)(REG)))
static void *psycho_pci_config_mkaddr(struct pci_pbm_info *pbm,
unsigned char bus,
unsigned int devfn,
int where)
{
if (!pbm)
return NULL;
return (void *)
(PSYCHO_CONFIG_BASE(pbm) |
PSYCHO_CONFIG_ENCODE(bus, devfn, where));
}
/* 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
* held when this is called.
*
* For the PCI error case we know which PBM (and thus which
* streaming buffer) caused the error, but for the uncorrectable
* error case we do not. So we always check both streaming caches.
*/
#define PSYCHO_STRBUF_CONTROL_A 0x2800UL
#define PSYCHO_STRBUF_CONTROL_B 0x4800UL
#define PSYCHO_STRBUF_CTRL_LPTR 0x00000000000000f0UL /* LRU Lock Pointer */
#define PSYCHO_STRBUF_CTRL_LENAB 0x0000000000000008UL /* LRU Lock Enable */
#define PSYCHO_STRBUF_CTRL_RRDIS 0x0000000000000004UL /* Rerun Disable */
#define PSYCHO_STRBUF_CTRL_DENAB 0x0000000000000002UL /* Diagnostic Mode Enable */
#define PSYCHO_STRBUF_CTRL_ENAB 0x0000000000000001UL /* Streaming Buffer Enable */
#define PSYCHO_STRBUF_FLUSH_A 0x2808UL
#define PSYCHO_STRBUF_FLUSH_B 0x4808UL
#define PSYCHO_STRBUF_FSYNC_A 0x2810UL
#define PSYCHO_STRBUF_FSYNC_B 0x4810UL
#define PSYCHO_STC_DATA_A 0xb000UL
#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.
*/
#define PSYCHO_IOMMU_CONTROL 0x0200UL
#define PSYCHO_IOMMU_CTRL_RESV 0xfffffffff9000000UL /* Reserved */
#define PSYCHO_IOMMU_CTRL_XLTESTAT 0x0000000006000000UL /* Translation Error Status */
#define PSYCHO_IOMMU_CTRL_XLTEERR 0x0000000001000000UL /* Translation Error encountered */
#define PSYCHO_IOMMU_CTRL_LCKEN 0x0000000000800000UL /* Enable translation locking */
#define PSYCHO_IOMMU_CTRL_LCKPTR 0x0000000000780000UL /* Translation lock pointer */
#define PSYCHO_IOMMU_CTRL_TSBSZ 0x0000000000070000UL /* TSB Size */
#define PSYCHO_IOMMU_TSBSZ_1K 0x0000000000000000UL /* TSB Table 1024 8-byte entries */
#define PSYCHO_IOMMU_TSBSZ_2K 0x0000000000010000UL /* TSB Table 2048 8-byte entries */
#define PSYCHO_IOMMU_TSBSZ_4K 0x0000000000020000UL /* TSB Table 4096 8-byte entries */
#define PSYCHO_IOMMU_TSBSZ_8K 0x0000000000030000UL /* TSB Table 8192 8-byte entries */
#define PSYCHO_IOMMU_TSBSZ_16K 0x0000000000040000UL /* TSB Table 16k 8-byte entries */
#define PSYCHO_IOMMU_TSBSZ_32K 0x0000000000050000UL /* TSB Table 32k 8-byte entries */
#define PSYCHO_IOMMU_TSBSZ_64K 0x0000000000060000UL /* TSB Table 64k 8-byte entries */
#define PSYCHO_IOMMU_TSBSZ_128K 0x0000000000070000UL /* TSB Table 128k 8-byte entries */
#define PSYCHO_IOMMU_CTRL_RESV2 0x000000000000fff8UL /* Reserved */
#define PSYCHO_IOMMU_CTRL_TBWSZ 0x0000000000000004UL /* Assumed page size, 0=8k 1=64k */
#define PSYCHO_IOMMU_CTRL_DENAB 0x0000000000000002UL /* Diagnostic mode enable */
#define PSYCHO_IOMMU_CTRL_ENAB 0x0000000000000001UL /* IOMMU Enable */
#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
* relating to UPA interface transactions.
*/
#define PSYCHO_UE_AFSR 0x0030UL
#define PSYCHO_UEAFSR_PPIO 0x8000000000000000UL /* Primary PIO is cause */
#define PSYCHO_UEAFSR_PDRD 0x4000000000000000UL /* Primary DVMA read is cause */
#define PSYCHO_UEAFSR_PDWR 0x2000000000000000UL /* Primary DVMA write is cause */
#define PSYCHO_UEAFSR_SPIO 0x1000000000000000UL /* Secondary PIO is cause */
#define PSYCHO_UEAFSR_SDRD 0x0800000000000000UL /* Secondary DVMA read is cause */
#define PSYCHO_UEAFSR_SDWR 0x0400000000000000UL /* Secondary DVMA write is cause*/
#define PSYCHO_UEAFSR_RESV1 0x03ff000000000000UL /* Reserved */
#define PSYCHO_UEAFSR_BMSK 0x0000ffff00000000UL /* Bytemask of failed transfer */
#define PSYCHO_UEAFSR_DOFF 0x00000000e0000000UL /* Doubleword Offset */
#define PSYCHO_UEAFSR_MID 0x000000001f000000UL /* UPA MID causing the fault */
#define PSYCHO_UEAFSR_BLK 0x0000000000800000UL /* Trans was block operation */
#define PSYCHO_UEAFSR_RESV2 0x00000000007fffffUL /* Reserved */
#define PSYCHO_UE_AFAR 0x0038UL
static irqreturn_t psycho_ue_intr(int irq, void *dev_id)
{
struct pci_pbm_info *pbm = dev_id;
unsigned long afsr_reg = pbm->controller_regs + PSYCHO_UE_AFSR;
unsigned long afar_reg = pbm->controller_regs + PSYCHO_UE_AFAR;
unsigned long afsr, afar, error_bits;
int reported;
/* Latch uncorrectable error status. */
afar = psycho_read(afar_reg);
afsr = psycho_read(afsr_reg);
/* Clear the primary/secondary error status bits. */
error_bits = afsr &
(PSYCHO_UEAFSR_PPIO | PSYCHO_UEAFSR_PDRD | PSYCHO_UEAFSR_PDWR |
PSYCHO_UEAFSR_SPIO | PSYCHO_UEAFSR_SDRD | PSYCHO_UEAFSR_SDWR);
if (!error_bits)
return IRQ_NONE;
psycho_write(afsr_reg, error_bits);
/* Log the error. */
printk("%s: Uncorrectable Error, primary error type[%s]\n",
pbm->name,
(((error_bits & PSYCHO_UEAFSR_PPIO) ?
"PIO" :
((error_bits & PSYCHO_UEAFSR_PDRD) ?
"DMA Read" :
((error_bits & PSYCHO_UEAFSR_PDWR) ?
"DMA Write" : "???")))));
printk("%s: bytemask[%04lx] dword_offset[%lx] UPA_MID[%02lx] was_block(%d)\n",
pbm->name,
(afsr & PSYCHO_UEAFSR_BMSK) >> 32UL,
(afsr & PSYCHO_UEAFSR_DOFF) >> 29UL,
(afsr & PSYCHO_UEAFSR_MID) >> 24UL,
((afsr & PSYCHO_UEAFSR_BLK) ? 1 : 0));
printk("%s: UE AFAR [%016lx]\n", pbm->name, afar);
printk("%s: UE Secondary errors [", pbm->name);
reported = 0;
if (afsr & PSYCHO_UEAFSR_SPIO) {
reported++;
printk("(PIO)");
}
if (afsr & PSYCHO_UEAFSR_SDRD) {
reported++;
printk("(DMA Read)");
}
if (afsr & PSYCHO_UEAFSR_SDWR) {
reported++;
printk("(DMA Write)");
}
if (!reported)
printk("(none)");
printk("]\n");
/* Interrogate both IOMMUs for error status. */
psycho_check_iommu_error(pbm, afsr, afar, UE_ERR);
if (pbm->sibling)
psycho_check_iommu_error(pbm->sibling, afsr, afar, UE_ERR);
return IRQ_HANDLED;
}
/* Correctable Errors. */
#define PSYCHO_CE_AFSR 0x0040UL
#define PSYCHO_CEAFSR_PPIO 0x8000000000000000UL /* Primary PIO is cause */
#define PSYCHO_CEAFSR_PDRD 0x4000000000000000UL /* Primary DVMA read is cause */
#define PSYCHO_CEAFSR_PDWR 0x2000000000000000UL /* Primary DVMA write is cause */
#define PSYCHO_CEAFSR_SPIO 0x1000000000000000UL /* Secondary PIO is cause */
#define PSYCHO_CEAFSR_SDRD 0x0800000000000000UL /* Secondary DVMA read is cause */
#define PSYCHO_CEAFSR_SDWR 0x0400000000000000UL /* Secondary DVMA write is cause*/
#define PSYCHO_CEAFSR_RESV1 0x0300000000000000UL /* Reserved */
#define PSYCHO_CEAFSR_ESYND 0x00ff000000000000UL /* Syndrome Bits */
#define PSYCHO_CEAFSR_BMSK 0x0000ffff00000000UL /* Bytemask of failed transfer */
#define PSYCHO_CEAFSR_DOFF 0x00000000e0000000UL /* Double Offset */
#define PSYCHO_CEAFSR_MID 0x000000001f000000UL /* UPA MID causing the fault */
#define PSYCHO_CEAFSR_BLK 0x0000000000800000UL /* Trans was block operation */
#define PSYCHO_CEAFSR_RESV2 0x00000000007fffffUL /* Reserved */
#define PSYCHO_CE_AFAR 0x0040UL
static irqreturn_t psycho_ce_intr(int irq, void *dev_id)
{
struct pci_pbm_info *pbm = dev_id;
unsigned long afsr_reg = pbm->controller_regs + PSYCHO_CE_AFSR;
unsigned long afar_reg = pbm->controller_regs + PSYCHO_CE_AFAR;
unsigned long afsr, afar, error_bits;
int reported;
/* Latch error status. */
afar = psycho_read(afar_reg);
afsr = psycho_read(afsr_reg);
/* Clear primary/secondary error status bits. */
error_bits = afsr &
(PSYCHO_CEAFSR_PPIO | PSYCHO_CEAFSR_PDRD | PSYCHO_CEAFSR_PDWR |
PSYCHO_CEAFSR_SPIO | PSYCHO_CEAFSR_SDRD | PSYCHO_CEAFSR_SDWR);
if (!error_bits)
return IRQ_NONE;
psycho_write(afsr_reg, error_bits);
/* Log the error. */
printk("%s: Correctable Error, primary error type[%s]\n",
pbm->name,
(((error_bits & PSYCHO_CEAFSR_PPIO) ?
"PIO" :
((error_bits & PSYCHO_CEAFSR_PDRD) ?
"DMA Read" :
((error_bits & PSYCHO_CEAFSR_PDWR) ?
"DMA Write" : "???")))));
/* XXX Use syndrome and afar to print out module string just like
* XXX UDB CE trap handler does... -DaveM
*/
printk("%s: syndrome[%02lx] bytemask[%04lx] dword_offset[%lx] "
"UPA_MID[%02lx] was_block(%d)\n",
pbm->name,
(afsr & PSYCHO_CEAFSR_ESYND) >> 48UL,
(afsr & PSYCHO_CEAFSR_BMSK) >> 32UL,
(afsr & PSYCHO_CEAFSR_DOFF) >> 29UL,
(afsr & PSYCHO_CEAFSR_MID) >> 24UL,
((afsr & PSYCHO_CEAFSR_BLK) ? 1 : 0));
printk("%s: CE AFAR [%016lx]\n", pbm->name, afar);
printk("%s: CE Secondary errors [", pbm->name);
reported = 0;
if (afsr & PSYCHO_CEAFSR_SPIO) {
reported++;
printk("(PIO)");
}
if (afsr & PSYCHO_CEAFSR_SDRD) {
reported++;
printk("(DMA Read)");
}
if (afsr & PSYCHO_CEAFSR_SDWR) {
reported++;
printk("(DMA Write)");
}
if (!reported)
printk("(none)");
printk("]\n");
return IRQ_HANDLED;
}
/* PCI Errors. They are signalled by the PCI bus module since they
* are associated with a specific bus segment.
*/
#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 */
#define PSYCHO_ECCCTRL_UE 0x4000000000000000UL /* Enable UE Interrupts */
#define PSYCHO_ECCCTRL_CE 0x2000000000000000UL /* Enable CE INterrupts */
static void psycho_register_error_handlers(struct pci_pbm_info *pbm)
{
struct of_device *op = of_find_device_by_node(pbm->op->node);
unsigned long base = pbm->controller_regs;
u64 tmp;
int err;
if (!op)
return;
/* Psycho interrupt property order is:
* 0: PCIERR INO for this PBM
* 1: UE ERR
* 2: CE ERR
* 3: POWER FAIL
* 4: SPARE HARDWARE
* 5: POWER MANAGEMENT
*/
if (op->num_irqs < 6)
return;
/* We really mean to ignore the return result here. Two
* PCI controller share the same interrupt numbers and
* drive the same front-end hardware. Whichever of the
* two get in here first will register the IRQ handler
* the second will just error out since we do not pass in
* IRQF_SHARED.
*/
err = request_irq(op->irqs[1], psycho_ue_intr, 0,
"PSYCHO_UE", pbm);
err = request_irq(op->irqs[2], psycho_ce_intr, 0,
"PSYCHO_CE", pbm);
/* This one, however, ought not to fail. We can just warn
* about it since the system can still operate properly even
* if this fails.
*/
err = request_irq(op->irqs[0], psycho_pcierr_intr, 0,
"PSYCHO_PCIERR", pbm);
if (err)
printk(KERN_WARNING "%s: Could not register PCIERR, "
"err=%d\n", pbm->name, err);
/* Enable UE and CE interrupts for controller. */
psycho_write(base + PSYCHO_ECC_CTRL,
(PSYCHO_ECCCTRL_EE |
PSYCHO_ECCCTRL_UE |
PSYCHO_ECCCTRL_CE));
/* Enable PCI Error interrupts and clear error
* bits for each PBM.
*/
tmp = psycho_read(base + PSYCHO_PCIA_CTRL);
tmp |= (PSYCHO_PCICTRL_SERR |
PSYCHO_PCICTRL_SBH_ERR |
PSYCHO_PCICTRL_EEN);
tmp &= ~(PSYCHO_PCICTRL_SBH_INT);
psycho_write(base + PSYCHO_PCIA_CTRL, tmp);
tmp = psycho_read(base + PSYCHO_PCIB_CTRL);
tmp |= (PSYCHO_PCICTRL_SERR |
PSYCHO_PCICTRL_SBH_ERR |
PSYCHO_PCICTRL_EEN);
tmp &= ~(PSYCHO_PCICTRL_SBH_INT);
psycho_write(base + PSYCHO_PCIB_CTRL, tmp);
}
/* PSYCHO boot time probing and initialization. */
static void pbm_config_busmastering(struct pci_pbm_info *pbm)
{
u8 *addr;
/* Set cache-line size to 64 bytes, this is actually
* a nop but I do it for completeness.
*/
addr = psycho_pci_config_mkaddr(pbm, pbm->pci_first_busno,
0, PCI_CACHE_LINE_SIZE);
pci_config_write8(addr, 64 / sizeof(u32));
/* Set PBM latency timer to 64 PCI clocks. */
addr = psycho_pci_config_mkaddr(pbm, pbm->pci_first_busno,
0, PCI_LATENCY_TIMER);
pci_config_write8(addr, 64);
}
static void __init psycho_scan_bus(struct pci_pbm_info *pbm,
struct device *parent)
{
pbm_config_busmastering(pbm);
pbm->is_66mhz_capable = 0;
pbm->pci_bus = pci_scan_one_pbm(pbm, parent);
/* After the PCI bus scan is complete, we can register
* the error interrupt handlers.
*/
psycho_register_error_handlers(pbm);
}
#define PSYCHO_IRQ_RETRY 0x1a00UL
#define PSYCHO_PCIA_DIAG 0x2020UL
#define PSYCHO_PCIB_DIAG 0x4020UL
#define PSYCHO_PCIDIAG_RESV 0xffffffffffffff80UL /* Reserved */
#define PSYCHO_PCIDIAG_DRETRY 0x0000000000000040UL /* Disable retry limit */
#define PSYCHO_PCIDIAG_DISYNC 0x0000000000000020UL /* Disable DMA wr / irq sync */
#define PSYCHO_PCIDIAG_DDWSYNC 0x0000000000000010UL /* Disable DMA wr / PIO rd sync */
#define PSYCHO_PCIDIAG_IDDPAR 0x0000000000000008UL /* Invert DMA data parity */
#define PSYCHO_PCIDIAG_IPDPAR 0x0000000000000004UL /* Invert PIO data parity */
#define PSYCHO_PCIDIAG_IPAPAR 0x0000000000000002UL /* Invert PIO address parity */
#define PSYCHO_PCIDIAG_LPBACK 0x0000000000000001UL /* Enable loopback mode */
static void psycho_controller_hwinit(struct pci_pbm_info *pbm)
{
u64 tmp;
psycho_write(pbm->controller_regs + PSYCHO_IRQ_RETRY, 5);
/* Enable arbiter for all PCI slots. */
tmp = psycho_read(pbm->controller_regs + PSYCHO_PCIA_CTRL);
tmp |= PSYCHO_PCICTRL_AEN;
psycho_write(pbm->controller_regs + PSYCHO_PCIA_CTRL, tmp);
tmp = psycho_read(pbm->controller_regs + PSYCHO_PCIB_CTRL);
tmp |= PSYCHO_PCICTRL_AEN;
psycho_write(pbm->controller_regs + PSYCHO_PCIB_CTRL, tmp);
/* Disable DMA write / PIO read synchronization on
* both PCI bus segments.
* [ U2P Erratum 1243770, STP2223BGA data sheet ]
*/
tmp = psycho_read(pbm->controller_regs + PSYCHO_PCIA_DIAG);
tmp |= PSYCHO_PCIDIAG_DDWSYNC;
psycho_write(pbm->controller_regs + PSYCHO_PCIA_DIAG, tmp);
tmp = psycho_read(pbm->controller_regs + PSYCHO_PCIB_DIAG);
tmp |= PSYCHO_PCIDIAG_DDWSYNC;
psycho_write(pbm->controller_regs + PSYCHO_PCIB_DIAG, tmp);
}
static void psycho_pbm_strbuf_init(struct pci_pbm_info *pbm,
int is_pbm_a)
{
unsigned long base = pbm->controller_regs;
u64 control;
if (is_pbm_a) {
pbm->stc.strbuf_control = base + PSYCHO_STRBUF_CONTROL_A;
pbm->stc.strbuf_pflush = base + PSYCHO_STRBUF_FLUSH_A;
pbm->stc.strbuf_fsync = base + PSYCHO_STRBUF_FSYNC_A;
pbm->stc.strbuf_err_stat = base + PSYCHO_STC_ERR_A;
pbm->stc.strbuf_tag_diag = base + PSYCHO_STC_TAG_A;
pbm->stc.strbuf_line_diag= base + PSYCHO_STC_LINE_A;
} else {
pbm->stc.strbuf_control = base + PSYCHO_STRBUF_CONTROL_B;
pbm->stc.strbuf_pflush = base + PSYCHO_STRBUF_FLUSH_B;
pbm->stc.strbuf_fsync = base + PSYCHO_STRBUF_FSYNC_B;
pbm->stc.strbuf_err_stat = base + PSYCHO_STC_ERR_B;
pbm->stc.strbuf_tag_diag = base + PSYCHO_STC_TAG_B;
pbm->stc.strbuf_line_diag= base + PSYCHO_STC_LINE_B;
}
/* PSYCHO's streaming buffer lacks ctx flushing. */
pbm->stc.strbuf_ctxflush = 0;
pbm->stc.strbuf_ctxmatch_base = 0;
pbm->stc.strbuf_flushflag = (volatile unsigned long *)
((((unsigned long)&pbm->stc.__flushflag_buf[0])
+ 63UL)
& ~63UL);
pbm->stc.strbuf_flushflag_pa = (unsigned long)
__pa(pbm->stc.strbuf_flushflag);
/* Enable the streaming buffer. We have to be careful
* just in case OBP left it with LRU locking enabled.
*
* It is possible to control if PBM will be rerun on
* line misses. Currently I just retain whatever setting
* OBP left us with. All checks so far show it having
* a value of zero.
*/
#undef PSYCHO_STRBUF_RERUN_ENABLE
#undef PSYCHO_STRBUF_RERUN_DISABLE
control = psycho_read(pbm->stc.strbuf_control);
control |= PSYCHO_STRBUF_CTRL_ENAB;
control &= ~(PSYCHO_STRBUF_CTRL_LENAB | PSYCHO_STRBUF_CTRL_LPTR);
#ifdef PSYCHO_STRBUF_RERUN_ENABLE
control &= ~(PSYCHO_STRBUF_CTRL_RRDIS);
#else
#ifdef PSYCHO_STRBUF_RERUN_DISABLE
control |= PSYCHO_STRBUF_CTRL_RRDIS;
#endif
#endif
psycho_write(pbm->stc.strbuf_control, control);
pbm->stc.strbuf_enabled = 1;
}
#define PSYCHO_IOSPACE_A 0x002000000UL
#define PSYCHO_IOSPACE_B 0x002010000UL
#define PSYCHO_IOSPACE_SIZE 0x00000ffffUL
#define PSYCHO_MEMSPACE_A 0x100000000UL
#define PSYCHO_MEMSPACE_B 0x180000000UL
#define PSYCHO_MEMSPACE_SIZE 0x07fffffffUL
static void __init psycho_pbm_init(struct pci_pbm_info *pbm,
struct of_device *op, int is_pbm_a)
{
struct device_node *dp = op->node;
pbm->next = pci_pbm_root;
pci_pbm_root = pbm;
pbm->numa_node = -1;
pbm->pci_ops = &sun4u_pci_ops;
pbm->config_space_reg_bits = 8;
pbm->index = pci_num_pbms++;
pbm->chip_type = PBM_CHIP_TYPE_PSYCHO;
pbm->chip_version = of_getintprop_default(dp, "version#", 0);
pbm->chip_revision = of_getintprop_default(dp, "module-revision#", 0);
pbm->op = op;
pbm->name = dp->full_name;
printk(KERN_INFO "%s: PSYCHO PCI Bus Module ver[%x:%x]\n",
pbm->name,
pbm->chip_version, pbm->chip_revision);
pci_determine_mem_io_space(pbm);
pci_get_pbm_props(pbm);
psycho_pbm_strbuf_init(pbm, is_pbm_a);
psycho_scan_bus(pbm, &op->dev);
}
static struct pci_pbm_info * __devinit psycho_find_sibling(u32 upa_portid)
{
struct pci_pbm_info *pbm;
for (pbm = pci_pbm_root; pbm; pbm = pbm->next) {
if (pbm->portid == upa_portid)
return pbm;
}
return NULL;
}
#define PSYCHO_CONFIGSPACE 0x001000000UL
static int __devinit psycho_probe(struct of_device *op,
const struct of_device_id *match)
{
const struct linux_prom64_registers *pr_regs;
struct device_node *dp = op->node;
struct pci_pbm_info *pbm;
struct iommu *iommu;
int is_pbm_a, err;
u32 upa_portid;
upa_portid = of_getintprop_default(dp, "upa-portid", 0xff);
err = -ENOMEM;
pbm = kzalloc(sizeof(*pbm), GFP_KERNEL);
if (!pbm) {
printk(KERN_ERR PFX "Cannot allocate pci_pbm_info.\n");
goto out_err;
}
pbm->sibling = psycho_find_sibling(upa_portid);
if (pbm->sibling) {
iommu = pbm->sibling->iommu;
} else {
iommu = kzalloc(sizeof(struct iommu), GFP_KERNEL);
if (!iommu) {
printk(KERN_ERR PFX "Cannot allocate PBM iommu.\n");
goto out_free_controller;
}
}
pbm->iommu = iommu;
pbm->portid = upa_portid;
pr_regs = of_get_property(dp, "reg", NULL);
err = -ENODEV;
if (!pr_regs) {
printk(KERN_ERR PFX "No reg property.\n");
goto out_free_iommu;
}
is_pbm_a = ((pr_regs[0].phys_addr & 0x6000) == 0x2000);
pbm->controller_regs = pr_regs[2].phys_addr;
pbm->config_space = (pr_regs[2].phys_addr + PSYCHO_CONFIGSPACE);
if (is_pbm_a) {
pbm->pci_afsr = pbm->controller_regs + PSYCHO_PCI_AFSR_A;
pbm->pci_afar = pbm->controller_regs + PSYCHO_PCI_AFAR_A;
pbm->pci_csr = pbm->controller_regs + PSYCHO_PCIA_CTRL;
} else {
pbm->pci_afsr = pbm->controller_regs + PSYCHO_PCI_AFSR_B;
pbm->pci_afar = pbm->controller_regs + PSYCHO_PCI_AFAR_B;
pbm->pci_csr = pbm->controller_regs + PSYCHO_PCIB_CTRL;
}
psycho_controller_hwinit(pbm);
if (!pbm->sibling) {
err = psycho_iommu_init(pbm, 128, 0xc0000000,
0xffffffff, PSYCHO_CONTROL);
if (err)
goto out_free_iommu;
/* If necessary, hook us up for starfire IRQ translations. */
if (this_is_starfire)
starfire_hookup(pbm->portid);
}
psycho_pbm_init(pbm, op, is_pbm_a);
if (pbm->sibling)
pbm->sibling->sibling = pbm;
dev_set_drvdata(&op->dev, pbm);
return 0;
out_free_iommu:
if (!pbm->sibling)
kfree(pbm->iommu);
out_free_controller:
kfree(pbm);
out_err:
return err;
}
static struct of_device_id __initdata psycho_match[] = {
{
.name = "pci",
.compatible = "pci108e,8000",
},
{},
};
static struct of_platform_driver psycho_driver = {
.name = DRIVER_NAME,
.match_table = psycho_match,
.probe = psycho_probe,
};
static int __init psycho_init(void)
{
return of_register_driver(&psycho_driver, &of_bus_type);
}
subsys_initcall(psycho_init);
