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linux/arch/sparc64/kernel/pci_schizo.c
David S. Miller ad7ad57c61 [SPARC64]: Fix conflicts in SBUS/PCI/EBUS/ISA DMA handling. 
Fully unify all of the DMA ops so that subordinate bus types to
the DMA operation providers (such as ebus, isa, of_device) can
work transparently.

Basically, we just make sure that for every system device we
create, the dev->archdata 'iommu' and 'stc' fields are filled
in.

Then we have two platform variants of the DMA ops, one for SUN4U which
actually programs the real hardware, and one for SUN4V which makes
hypervisor calls.

This also fixes the crashes in parport_pc on sparc64, reported by
Meelis Roos.

Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-30 00:27:34 -07:00

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/* pci_schizo.c: SCHIZO/TOMATILLO specific PCI controller support.
*
* Copyright (C) 2001, 2002, 2003, 2007 David S. Miller (davem@davemloft.net)
*/
#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 <asm/iommu.h>
#include <asm/irq.h>
#include <asm/upa.h>
#include <asm/pstate.h>
#include <asm/prom.h>
#include <asm/of_device.h>
#include <asm/oplib.h>
#include "pci_impl.h"
#include "iommu_common.h"
/* All SCHIZO registers are 64-bits. The following accessor
* routines are how they are accessed. The REG parameter
* is a physical address.
*/
#define schizo_read(__reg) \
({ u64 __ret; \
__asm__ __volatile__("ldxa [%1] %2, %0" \
: "=r" (__ret) \
: "r" (__reg), "i" (ASI_PHYS_BYPASS_EC_E) \
: "memory"); \
__ret; \
})
#define schizo_write(__reg, __val) \
__asm__ __volatile__("stxa %0, [%1] %2" \
: /* no outputs */ \
: "r" (__val), "r" (__reg), \
"i" (ASI_PHYS_BYPASS_EC_E) \
: "memory")
/* This is a convention that at least Excalibur and Merlin
* follow. I suppose the SCHIZO used in Starcat and friends
* will do similar.
*
* The only way I could see this changing is if the newlink
* block requires more space in Schizo's address space than
* they predicted, thus requiring an address space reorg when
* the newer Schizo is taped out.
*/
/* Streaming buffer control register. */
#define SCHIZO_STRBUF_CTRL_LPTR 0x00000000000000f0UL /* LRU Lock Pointer */
#define SCHIZO_STRBUF_CTRL_LENAB 0x0000000000000008UL /* LRU Lock Enable */
#define SCHIZO_STRBUF_CTRL_RRDIS 0x0000000000000004UL /* Rerun Disable */
#define SCHIZO_STRBUF_CTRL_DENAB 0x0000000000000002UL /* Diagnostic Mode Enable */
#define SCHIZO_STRBUF_CTRL_ENAB 0x0000000000000001UL /* Streaming Buffer Enable */
/* IOMMU control register. */
#define SCHIZO_IOMMU_CTRL_RESV 0xfffffffff9000000UL /* Reserved */
#define SCHIZO_IOMMU_CTRL_XLTESTAT 0x0000000006000000UL /* Translation Error Status */
#define SCHIZO_IOMMU_CTRL_XLTEERR 0x0000000001000000UL /* Translation Error encountered */
#define SCHIZO_IOMMU_CTRL_LCKEN 0x0000000000800000UL /* Enable translation locking */
#define SCHIZO_IOMMU_CTRL_LCKPTR 0x0000000000780000UL /* Translation lock pointer */
#define SCHIZO_IOMMU_CTRL_TSBSZ 0x0000000000070000UL /* TSB Size */
#define SCHIZO_IOMMU_TSBSZ_1K 0x0000000000000000UL /* TSB Table 1024 8-byte entries */
#define SCHIZO_IOMMU_TSBSZ_2K 0x0000000000010000UL /* TSB Table 2048 8-byte entries */
#define SCHIZO_IOMMU_TSBSZ_4K 0x0000000000020000UL /* TSB Table 4096 8-byte entries */
#define SCHIZO_IOMMU_TSBSZ_8K 0x0000000000030000UL /* TSB Table 8192 8-byte entries */
#define SCHIZO_IOMMU_TSBSZ_16K 0x0000000000040000UL /* TSB Table 16k 8-byte entries */
#define SCHIZO_IOMMU_TSBSZ_32K 0x0000000000050000UL /* TSB Table 32k 8-byte entries */
#define SCHIZO_IOMMU_TSBSZ_64K 0x0000000000060000UL /* TSB Table 64k 8-byte entries */
#define SCHIZO_IOMMU_TSBSZ_128K 0x0000000000070000UL /* TSB Table 128k 8-byte entries */
#define SCHIZO_IOMMU_CTRL_RESV2 0x000000000000fff8UL /* Reserved */
#define SCHIZO_IOMMU_CTRL_TBWSZ 0x0000000000000004UL /* Assumed page size, 0=8k 1=64k */
#define SCHIZO_IOMMU_CTRL_DENAB 0x0000000000000002UL /* Diagnostic mode enable */
#define SCHIZO_IOMMU_CTRL_ENAB 0x0000000000000001UL /* IOMMU Enable */
/* Schizo config space address format is nearly identical to
* that of PSYCHO:
*
* 32 24 23 16 15 11 10 8 7 2 1 0
* ---------------------------------------------------------
* |0 0 0 0 0 0 0 0 0| bus | device | function | reg | 0 0 |
* ---------------------------------------------------------
*/
#define SCHIZO_CONFIG_BASE(PBM) ((PBM)->config_space)
#define SCHIZO_CONFIG_ENCODE(BUS, DEVFN, REG) \
(((unsigned long)(BUS) << 16) | \
((unsigned long)(DEVFN) << 8) | \
((unsigned long)(REG)))
static void *schizo_pci_config_mkaddr(struct pci_pbm_info *pbm,
unsigned char bus,
unsigned int devfn,
int where)
{
if (!pbm)
return NULL;
bus -= pbm->pci_first_busno;
return (void *)
(SCHIZO_CONFIG_BASE(pbm) |
SCHIZO_CONFIG_ENCODE(bus, devfn, where));
}
/* SCHIZO error handling support. */
enum schizo_error_type {
UE_ERR, CE_ERR, PCI_ERR, SAFARI_ERR
};
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];
#define SCHIZO_UE_INO 0x30 /* Uncorrectable ECC error */
#define SCHIZO_CE_INO 0x31 /* Correctable ECC error */
#define SCHIZO_PCIERR_A_INO 0x32 /* PBM A PCI bus error */
#define SCHIZO_PCIERR_B_INO 0x33 /* PBM B PCI bus error */
#define SCHIZO_SERR_INO 0x34 /* Safari interface error */
#define SCHIZO_STC_ERR 0xb800UL /* --> 0xba00 */
#define SCHIZO_STC_TAG 0xba00UL /* --> 0xba80 */
#define SCHIZO_STC_LINE 0xbb00UL /* --> 0xbb80 */
#define SCHIZO_STCERR_WRITE 0x2UL
#define SCHIZO_STCERR_READ 0x1UL
#define SCHIZO_STCTAG_PPN 0x3fffffff00000000UL
#define SCHIZO_STCTAG_VPN 0x00000000ffffe000UL
#define SCHIZO_STCTAG_VALID 0x8000000000000000UL
#define SCHIZO_STCTAG_READ 0x4000000000000000UL
#define SCHIZO_STCLINE_LINDX 0x0000000007800000UL
#define SCHIZO_STCLINE_SPTR 0x000000000007e000UL
#define SCHIZO_STCLINE_LADDR 0x0000000000001fc0UL
#define SCHIZO_STCLINE_EPTR 0x000000000000003fUL
#define SCHIZO_STCLINE_VALID 0x0000000000600000UL
#define SCHIZO_STCLINE_FOFN 0x0000000000180000UL
static void __schizo_check_stc_error_pbm(struct pci_pbm_info *pbm,
enum schizo_error_type type)
{
struct strbuf *strbuf = &pbm->stc;
unsigned long regbase = pbm->pbm_regs;
unsigned long err_base, tag_base, line_base;
u64 control;
int i;
err_base = regbase + SCHIZO_STC_ERR;
tag_base = regbase + SCHIZO_STC_TAG;
line_base = regbase + SCHIZO_STC_LINE;
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 = schizo_read(strbuf->strbuf_control);
schizo_write(strbuf->strbuf_control,
(control | SCHIZO_STRBUF_CTRL_DENAB));
for (i = 0; i < 128; i++) {
unsigned long val;
val = schizo_read(err_base + (i * 8UL));
schizo_write(err_base + (i * 8UL), 0UL);
stc_error_buf[i] = val;
}
for (i = 0; i < 16; i++) {
stc_tag_buf[i] = schizo_read(tag_base + (i * 8UL));
stc_line_buf[i] = schizo_read(line_base + (i * 8UL));
schizo_write(tag_base + (i * 8UL), 0UL);
schizo_write(line_base + (i * 8UL), 0UL);
}
/* OK, state is logged, exit diagnostic mode. */
schizo_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 & SCHIZO_STCERR_WRITE) ? 1 : 0,
(errval & SCHIZO_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)R(%d)]\n",
pbm->name,
i,
((tagval & SCHIZO_STCTAG_PPN) >> 19UL),
(tagval & SCHIZO_STCTAG_VPN),
((tagval & SCHIZO_STCTAG_VALID) ? 1 : 0),
((tagval & SCHIZO_STCTAG_READ) ? 1 : 0));
/* XXX Should spit out per-bank error information... -DaveM */
printk("%s: STC_LINE(%d)[LIDX(%lx)SP(%lx)LADDR(%lx)EP(%lx)"
"V(%d)FOFN(%d)]\n",
pbm->name,
i,
((lineval & SCHIZO_STCLINE_LINDX) >> 23UL),
((lineval & SCHIZO_STCLINE_SPTR) >> 13UL),
((lineval & SCHIZO_STCLINE_LADDR) >> 6UL),
((lineval & SCHIZO_STCLINE_EPTR) >> 0UL),
((lineval & SCHIZO_STCLINE_VALID) ? 1 : 0),
((lineval & SCHIZO_STCLINE_FOFN) ? 1 : 0));
}
}
spin_unlock(&stc_buf_lock);
}
/* IOMMU is per-PBM in Schizo, so interrogate both for anonymous
* controller level errors.
*/
#define SCHIZO_IOMMU_TAG 0xa580UL
#define SCHIZO_IOMMU_DATA 0xa600UL
#define SCHIZO_IOMMU_TAG_CTXT 0x0000001ffe000000UL
#define SCHIZO_IOMMU_TAG_ERRSTS 0x0000000001800000UL
#define SCHIZO_IOMMU_TAG_ERR 0x0000000000400000UL
#define SCHIZO_IOMMU_TAG_WRITE 0x0000000000200000UL
#define SCHIZO_IOMMU_TAG_STREAM 0x0000000000100000UL
#define SCHIZO_IOMMU_TAG_SIZE 0x0000000000080000UL
#define SCHIZO_IOMMU_TAG_VPAGE 0x000000000007ffffUL
#define SCHIZO_IOMMU_DATA_VALID 0x0000000100000000UL
#define SCHIZO_IOMMU_DATA_CACHE 0x0000000040000000UL
#define SCHIZO_IOMMU_DATA_PPAGE 0x000000003fffffffUL
static void schizo_check_iommu_error_pbm(struct pci_pbm_info *pbm,
enum schizo_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 = schizo_read(iommu->iommu_control);
if (control & SCHIZO_IOMMU_CTRL_XLTEERR) {
unsigned long base;
char *type_string;
/* Clear the error encountered bit. */
control &= ~SCHIZO_IOMMU_CTRL_XLTEERR;
schizo_write(iommu->iommu_control, control);
switch((control & SCHIZO_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.
*/
schizo_write(iommu->iommu_control,
control | SCHIZO_IOMMU_CTRL_DENAB);
base = pbm->pbm_regs;
for (i = 0; i < 16; i++) {
iommu_tag[i] =
schizo_read(base + SCHIZO_IOMMU_TAG + (i * 8UL));
iommu_data[i] =
schizo_read(base + SCHIZO_IOMMU_DATA + (i * 8UL));
/* Now clear out the entry. */
schizo_write(base + SCHIZO_IOMMU_TAG + (i * 8UL), 0);
schizo_write(base + SCHIZO_IOMMU_DATA + (i * 8UL), 0);
}
/* Leave diagnostic mode. */
schizo_write(iommu->iommu_control, control);
for (i = 0; i < 16; i++) {
unsigned long tag, data;
tag = iommu_tag[i];
if (!(tag & SCHIZO_IOMMU_TAG_ERR))
continue;
data = iommu_data[i];
switch((tag & SCHIZO_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) ctx(%x) wr(%d) str(%d) "
"sz(%dK) vpg(%08lx)]\n",
pbm->name, i, type_string,
(int)((tag & SCHIZO_IOMMU_TAG_CTXT) >> 25UL),
((tag & SCHIZO_IOMMU_TAG_WRITE) ? 1 : 0),
((tag & SCHIZO_IOMMU_TAG_STREAM) ? 1 : 0),
((tag & SCHIZO_IOMMU_TAG_SIZE) ? 64 : 8),
(tag & SCHIZO_IOMMU_TAG_VPAGE) << IOMMU_PAGE_SHIFT);
printk("%s: IOMMU DATA(%d)[valid(%d) cache(%d) ppg(%016lx)]\n",
pbm->name, i,
((data & SCHIZO_IOMMU_DATA_VALID) ? 1 : 0),
((data & SCHIZO_IOMMU_DATA_CACHE) ? 1 : 0),
(data & SCHIZO_IOMMU_DATA_PPAGE) << IOMMU_PAGE_SHIFT);
}
}
if (pbm->stc.strbuf_enabled)
__schizo_check_stc_error_pbm(pbm, type);
spin_unlock_irqrestore(&iommu->lock, flags);
}
static void schizo_check_iommu_error(struct pci_controller_info *p,
enum schizo_error_type type)
{
schizo_check_iommu_error_pbm(&p->pbm_A, type);
schizo_check_iommu_error_pbm(&p->pbm_B, type);
}
/* Uncorrectable ECC error status gathering. */
#define SCHIZO_UE_AFSR 0x10030UL
#define SCHIZO_UE_AFAR 0x10038UL
#define SCHIZO_UEAFSR_PPIO 0x8000000000000000UL /* Safari */
#define SCHIZO_UEAFSR_PDRD 0x4000000000000000UL /* Safari/Tomatillo */
#define SCHIZO_UEAFSR_PDWR 0x2000000000000000UL /* Safari */
#define SCHIZO_UEAFSR_SPIO 0x1000000000000000UL /* Safari */
#define SCHIZO_UEAFSR_SDMA 0x0800000000000000UL /* Safari/Tomatillo */
#define SCHIZO_UEAFSR_ERRPNDG 0x0300000000000000UL /* Safari */
#define SCHIZO_UEAFSR_BMSK 0x000003ff00000000UL /* Safari */
#define SCHIZO_UEAFSR_QOFF 0x00000000c0000000UL /* Safari/Tomatillo */
#define SCHIZO_UEAFSR_AID 0x000000001f000000UL /* Safari/Tomatillo */
#define SCHIZO_UEAFSR_PARTIAL 0x0000000000800000UL /* Safari */
#define SCHIZO_UEAFSR_OWNEDIN 0x0000000000400000UL /* Safari */
#define SCHIZO_UEAFSR_MTAGSYND 0x00000000000f0000UL /* Safari */
#define SCHIZO_UEAFSR_MTAG 0x000000000000e000UL /* Safari */
#define SCHIZO_UEAFSR_ECCSYND 0x00000000000001ffUL /* Safari */
static irqreturn_t schizo_ue_intr(int irq, void *dev_id)
{
struct pci_pbm_info *pbm = dev_id;
struct pci_controller_info *p = pbm->parent;
unsigned long afsr_reg = pbm->controller_regs + SCHIZO_UE_AFSR;
unsigned long afar_reg = pbm->controller_regs + SCHIZO_UE_AFAR;
unsigned long afsr, afar, error_bits;
int reported, limit;
/* Latch uncorrectable error status. */
afar = schizo_read(afar_reg);
/* If either of the error pending bits are set in the
* AFSR, the error status is being actively updated by
* the hardware and we must re-read to get a clean value.
*/
limit = 1000;
do {
afsr = schizo_read(afsr_reg);
} while ((afsr & SCHIZO_UEAFSR_ERRPNDG) != 0 && --limit);
/* Clear the primary/secondary error status bits. */
error_bits = afsr &
(SCHIZO_UEAFSR_PPIO | SCHIZO_UEAFSR_PDRD | SCHIZO_UEAFSR_PDWR |
SCHIZO_UEAFSR_SPIO | SCHIZO_UEAFSR_SDMA);
if (!error_bits)
return IRQ_NONE;
schizo_write(afsr_reg, error_bits);
/* Log the error. */
printk("%s: Uncorrectable Error, primary error type[%s]\n",
pbm->name,
(((error_bits & SCHIZO_UEAFSR_PPIO) ?
"PIO" :
((error_bits & SCHIZO_UEAFSR_PDRD) ?
"DMA Read" :
((error_bits & SCHIZO_UEAFSR_PDWR) ?
"DMA Write" : "???")))));
printk("%s: bytemask[%04lx] qword_offset[%lx] SAFARI_AID[%02lx]\n",
pbm->name,
(afsr & SCHIZO_UEAFSR_BMSK) >> 32UL,
(afsr & SCHIZO_UEAFSR_QOFF) >> 30UL,
(afsr & SCHIZO_UEAFSR_AID) >> 24UL);
printk("%s: partial[%d] owned_in[%d] mtag[%lx] mtag_synd[%lx] ecc_sync[%lx]\n",
pbm->name,
(afsr & SCHIZO_UEAFSR_PARTIAL) ? 1 : 0,
(afsr & SCHIZO_UEAFSR_OWNEDIN) ? 1 : 0,
(afsr & SCHIZO_UEAFSR_MTAG) >> 13UL,
(afsr & SCHIZO_UEAFSR_MTAGSYND) >> 16UL,
(afsr & SCHIZO_UEAFSR_ECCSYND) >> 0UL);
printk("%s: UE AFAR [%016lx]\n", pbm->name, afar);
printk("%s: UE Secondary errors [", pbm->name);
reported = 0;
if (afsr & SCHIZO_UEAFSR_SPIO) {
reported++;
printk("(PIO)");
}
if (afsr & SCHIZO_UEAFSR_SDMA) {
reported++;
printk("(DMA)");
}
if (!reported)
printk("(none)");
printk("]\n");
/* Interrogate IOMMU for error status. */
schizo_check_iommu_error(p, UE_ERR);
return IRQ_HANDLED;
}
#define SCHIZO_CE_AFSR 0x10040UL
#define SCHIZO_CE_AFAR 0x10048UL
#define SCHIZO_CEAFSR_PPIO 0x8000000000000000UL
#define SCHIZO_CEAFSR_PDRD 0x4000000000000000UL
#define SCHIZO_CEAFSR_PDWR 0x2000000000000000UL
#define SCHIZO_CEAFSR_SPIO 0x1000000000000000UL
#define SCHIZO_CEAFSR_SDMA 0x0800000000000000UL
#define SCHIZO_CEAFSR_ERRPNDG 0x0300000000000000UL
#define SCHIZO_CEAFSR_BMSK 0x000003ff00000000UL
#define SCHIZO_CEAFSR_QOFF 0x00000000c0000000UL
#define SCHIZO_CEAFSR_AID 0x000000001f000000UL
#define SCHIZO_CEAFSR_PARTIAL 0x0000000000800000UL
#define SCHIZO_CEAFSR_OWNEDIN 0x0000000000400000UL
#define SCHIZO_CEAFSR_MTAGSYND 0x00000000000f0000UL
#define SCHIZO_CEAFSR_MTAG 0x000000000000e000UL
#define SCHIZO_CEAFSR_ECCSYND 0x00000000000001ffUL
static irqreturn_t schizo_ce_intr(int irq, void *dev_id)
{
struct pci_pbm_info *pbm = dev_id;
unsigned long afsr_reg = pbm->controller_regs + SCHIZO_CE_AFSR;
unsigned long afar_reg = pbm->controller_regs + SCHIZO_CE_AFAR;
unsigned long afsr, afar, error_bits;
int reported, limit;
/* Latch error status. */
afar = schizo_read(afar_reg);
/* If either of the error pending bits are set in the
* AFSR, the error status is being actively updated by
* the hardware and we must re-read to get a clean value.
*/
limit = 1000;
do {
afsr = schizo_read(afsr_reg);
} while ((afsr & SCHIZO_UEAFSR_ERRPNDG) != 0 && --limit);
/* Clear primary/secondary error status bits. */
error_bits = afsr &
(SCHIZO_CEAFSR_PPIO | SCHIZO_CEAFSR_PDRD | SCHIZO_CEAFSR_PDWR |
SCHIZO_CEAFSR_SPIO | SCHIZO_CEAFSR_SDMA);
if (!error_bits)
return IRQ_NONE;
schizo_write(afsr_reg, error_bits);
/* Log the error. */
printk("%s: Correctable Error, primary error type[%s]\n",
pbm->name,
(((error_bits & SCHIZO_CEAFSR_PPIO) ?
"PIO" :
((error_bits & SCHIZO_CEAFSR_PDRD) ?
"DMA Read" :
((error_bits & SCHIZO_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: bytemask[%04lx] qword_offset[%lx] SAFARI_AID[%02lx]\n",
pbm->name,
(afsr & SCHIZO_UEAFSR_BMSK) >> 32UL,
(afsr & SCHIZO_UEAFSR_QOFF) >> 30UL,
(afsr & SCHIZO_UEAFSR_AID) >> 24UL);
printk("%s: partial[%d] owned_in[%d] mtag[%lx] mtag_synd[%lx] ecc_sync[%lx]\n",
pbm->name,
(afsr & SCHIZO_UEAFSR_PARTIAL) ? 1 : 0,
(afsr & SCHIZO_UEAFSR_OWNEDIN) ? 1 : 0,
(afsr & SCHIZO_UEAFSR_MTAG) >> 13UL,
(afsr & SCHIZO_UEAFSR_MTAGSYND) >> 16UL,
(afsr & SCHIZO_UEAFSR_ECCSYND) >> 0UL);
printk("%s: CE AFAR [%016lx]\n", pbm->name, afar);
printk("%s: CE Secondary errors [", pbm->name);
reported = 0;
if (afsr & SCHIZO_CEAFSR_SPIO) {
reported++;
printk("(PIO)");
}
if (afsr & SCHIZO_CEAFSR_SDMA) {
reported++;
printk("(DMA)");
}
if (!reported)
printk("(none)");
printk("]\n");
return IRQ_HANDLED;
}
#define SCHIZO_PCI_AFSR 0x2010UL
#define SCHIZO_PCI_AFAR 0x2018UL
#define SCHIZO_PCIAFSR_PMA 0x8000000000000000UL /* Schizo/Tomatillo */
#define SCHIZO_PCIAFSR_PTA 0x4000000000000000UL /* Schizo/Tomatillo */
#define SCHIZO_PCIAFSR_PRTRY 0x2000000000000000UL /* Schizo/Tomatillo */
#define SCHIZO_PCIAFSR_PPERR 0x1000000000000000UL /* Schizo/Tomatillo */
#define SCHIZO_PCIAFSR_PTTO 0x0800000000000000UL /* Schizo/Tomatillo */
#define SCHIZO_PCIAFSR_PUNUS 0x0400000000000000UL /* Schizo */
#define SCHIZO_PCIAFSR_SMA 0x0200000000000000UL /* Schizo/Tomatillo */
#define SCHIZO_PCIAFSR_STA 0x0100000000000000UL /* Schizo/Tomatillo */
#define SCHIZO_PCIAFSR_SRTRY 0x0080000000000000UL /* Schizo/Tomatillo */
#define SCHIZO_PCIAFSR_SPERR 0x0040000000000000UL /* Schizo/Tomatillo */
#define SCHIZO_PCIAFSR_STTO 0x0020000000000000UL /* Schizo/Tomatillo */
#define SCHIZO_PCIAFSR_SUNUS 0x0010000000000000UL /* Schizo */
#define SCHIZO_PCIAFSR_BMSK 0x000003ff00000000UL /* Schizo/Tomatillo */
#define SCHIZO_PCIAFSR_BLK 0x0000000080000000UL /* Schizo/Tomatillo */
#define SCHIZO_PCIAFSR_CFG 0x0000000040000000UL /* Schizo/Tomatillo */
#define SCHIZO_PCIAFSR_MEM 0x0000000020000000UL /* Schizo/Tomatillo */
#define SCHIZO_PCIAFSR_IO 0x0000000010000000UL /* Schizo/Tomatillo */
#define SCHIZO_PCI_CTRL (0x2000UL)
#define SCHIZO_PCICTRL_BUS_UNUS (1UL << 63UL) /* Safari */
#define SCHIZO_PCICTRL_DTO_INT (1UL << 61UL) /* Tomatillo */
#define SCHIZO_PCICTRL_ARB_PRIO (0x1ff << 52UL) /* Tomatillo */
#define SCHIZO_PCICTRL_ESLCK (1UL << 51UL) /* Safari */
#define SCHIZO_PCICTRL_ERRSLOT (7UL << 48UL) /* Safari */
#define SCHIZO_PCICTRL_TTO_ERR (1UL << 38UL) /* Safari/Tomatillo */
#define SCHIZO_PCICTRL_RTRY_ERR (1UL << 37UL) /* Safari/Tomatillo */
#define SCHIZO_PCICTRL_DTO_ERR (1UL << 36UL) /* Safari/Tomatillo */
#define SCHIZO_PCICTRL_SBH_ERR (1UL << 35UL) /* Safari */
#define SCHIZO_PCICTRL_SERR (1UL << 34UL) /* Safari/Tomatillo */
#define SCHIZO_PCICTRL_PCISPD (1UL << 33UL) /* Safari */
#define SCHIZO_PCICTRL_MRM_PREF (1UL << 30UL) /* Tomatillo */
#define SCHIZO_PCICTRL_RDO_PREF (1UL << 29UL) /* Tomatillo */
#define SCHIZO_PCICTRL_RDL_PREF (1UL << 28UL) /* Tomatillo */
#define SCHIZO_PCICTRL_PTO (3UL << 24UL) /* Safari/Tomatillo */
#define SCHIZO_PCICTRL_PTO_SHIFT 24UL
#define SCHIZO_PCICTRL_TRWSW (7UL << 21UL) /* Tomatillo */
#define SCHIZO_PCICTRL_F_TGT_A (1UL << 20UL) /* Tomatillo */
#define SCHIZO_PCICTRL_S_DTO_INT (1UL << 19UL) /* Safari */
#define SCHIZO_PCICTRL_F_TGT_RT (1UL << 19UL) /* Tomatillo */
#define SCHIZO_PCICTRL_SBH_INT (1UL << 18UL) /* Safari */
#define SCHIZO_PCICTRL_T_DTO_INT (1UL << 18UL) /* Tomatillo */
#define SCHIZO_PCICTRL_EEN (1UL << 17UL) /* Safari/Tomatillo */
#define SCHIZO_PCICTRL_PARK (1UL << 16UL) /* Safari/Tomatillo */
#define SCHIZO_PCICTRL_PCIRST (1UL << 8UL) /* Safari */
#define SCHIZO_PCICTRL_ARB_S (0x3fUL << 0UL) /* Safari */
#define SCHIZO_PCICTRL_ARB_T (0xffUL << 0UL) /* Tomatillo */
static irqreturn_t schizo_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->pbm_regs + SCHIZO_PCI_CTRL;
csr = schizo_read(csr_reg);
csr_error_bits =
csr & (SCHIZO_PCICTRL_BUS_UNUS |
SCHIZO_PCICTRL_TTO_ERR |
SCHIZO_PCICTRL_RTRY_ERR |
SCHIZO_PCICTRL_DTO_ERR |
SCHIZO_PCICTRL_SBH_ERR |
SCHIZO_PCICTRL_SERR);
if (csr_error_bits) {
/* Clear the errors. */
schizo_write(csr_reg, csr);
/* Log 'em. */
if (csr_error_bits & SCHIZO_PCICTRL_BUS_UNUS)
printk("%s: Bus unusable error asserted.\n",
pbm->name);
if (csr_error_bits & SCHIZO_PCICTRL_TTO_ERR)
printk("%s: PCI TRDY# timeout error asserted.\n",
pbm->name);
if (csr_error_bits & SCHIZO_PCICTRL_RTRY_ERR)
printk("%s: PCI excessive retry error asserted.\n",
pbm->name);
if (csr_error_bits & SCHIZO_PCICTRL_DTO_ERR)
printk("%s: PCI discard timeout error asserted.\n",
pbm->name);
if (csr_error_bits & SCHIZO_PCICTRL_SBH_ERR)
printk("%s: PCI streaming byte hole error asserted.\n",
pbm->name);
if (csr_error_bits & SCHIZO_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 schizo_pcierr_intr(int irq, void *dev_id)
{
struct pci_pbm_info *pbm = dev_id;
struct pci_controller_info *p = pbm->parent;
unsigned long afsr_reg, afar_reg, base;
unsigned long afsr, afar, error_bits;
int reported;
base = pbm->pbm_regs;
afsr_reg = base + SCHIZO_PCI_AFSR;
afar_reg = base + SCHIZO_PCI_AFAR;
/* Latch error status. */
afar = schizo_read(afar_reg);
afsr = schizo_read(afsr_reg);
/* Clear primary/secondary error status bits. */
error_bits = afsr &
(SCHIZO_PCIAFSR_PMA | SCHIZO_PCIAFSR_PTA |
SCHIZO_PCIAFSR_PRTRY | SCHIZO_PCIAFSR_PPERR |
SCHIZO_PCIAFSR_PTTO | SCHIZO_PCIAFSR_PUNUS |
SCHIZO_PCIAFSR_SMA | SCHIZO_PCIAFSR_STA |
SCHIZO_PCIAFSR_SRTRY | SCHIZO_PCIAFSR_SPERR |
SCHIZO_PCIAFSR_STTO | SCHIZO_PCIAFSR_SUNUS);
if (!error_bits)
return schizo_pcierr_intr_other(pbm);
schizo_write(afsr_reg, error_bits);
/* Log the error. */
printk("%s: PCI Error, primary error type[%s]\n",
pbm->name,
(((error_bits & SCHIZO_PCIAFSR_PMA) ?
"Master Abort" :
((error_bits & SCHIZO_PCIAFSR_PTA) ?
"Target Abort" :
((error_bits & SCHIZO_PCIAFSR_PRTRY) ?
"Excessive Retries" :
((error_bits & SCHIZO_PCIAFSR_PPERR) ?
"Parity Error" :
((error_bits & SCHIZO_PCIAFSR_PTTO) ?
"Timeout" :
((error_bits & SCHIZO_PCIAFSR_PUNUS) ?
"Bus Unusable" : "???"))))))));
printk("%s: bytemask[%04lx] was_block(%d) space(%s)\n",
pbm->name,
(afsr & SCHIZO_PCIAFSR_BMSK) >> 32UL,
(afsr & SCHIZO_PCIAFSR_BLK) ? 1 : 0,
((afsr & SCHIZO_PCIAFSR_CFG) ?
"Config" :
((afsr & SCHIZO_PCIAFSR_MEM) ?
"Memory" :
((afsr & SCHIZO_PCIAFSR_IO) ?
"I/O" : "???"))));
printk("%s: PCI AFAR [%016lx]\n",
pbm->name, afar);
printk("%s: PCI Secondary errors [",
pbm->name);
reported = 0;
if (afsr & SCHIZO_PCIAFSR_SMA) {
reported++;
printk("(Master Abort)");
}
if (afsr & SCHIZO_PCIAFSR_STA) {
reported++;
printk("(Target Abort)");
}
if (afsr & SCHIZO_PCIAFSR_SRTRY) {
reported++;
printk("(Excessive Retries)");
}
if (afsr & SCHIZO_PCIAFSR_SPERR) {
reported++;
printk("(Parity Error)");
}
if (afsr & SCHIZO_PCIAFSR_STTO) {
reported++;
printk("(Timeout)");
}
if (afsr & SCHIZO_PCIAFSR_SUNUS) {
reported++;
printk("(Bus Unusable)");
}
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 & (SCHIZO_PCIAFSR_PTA | SCHIZO_PCIAFSR_STA)) {
schizo_check_iommu_error(p, PCI_ERR);
pci_scan_for_target_abort(pbm, pbm->pci_bus);
}
if (error_bits & (SCHIZO_PCIAFSR_PMA | SCHIZO_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 & (SCHIZO_PCIAFSR_PPERR | SCHIZO_PCIAFSR_SPERR))
pci_scan_for_parity_error(pbm, pbm->pci_bus);
return IRQ_HANDLED;
}
#define SCHIZO_SAFARI_ERRLOG 0x10018UL
#define SAFARI_ERRLOG_ERROUT 0x8000000000000000UL
#define BUS_ERROR_BADCMD 0x4000000000000000UL /* Schizo/Tomatillo */
#define BUS_ERROR_SSMDIS 0x2000000000000000UL /* Safari */
#define BUS_ERROR_BADMA 0x1000000000000000UL /* Safari */
#define BUS_ERROR_BADMB 0x0800000000000000UL /* Safari */
#define BUS_ERROR_BADMC 0x0400000000000000UL /* Safari */
#define BUS_ERROR_SNOOP_GR 0x0000000000200000UL /* Tomatillo */
#define BUS_ERROR_SNOOP_PCI 0x0000000000100000UL /* Tomatillo */
#define BUS_ERROR_SNOOP_RD 0x0000000000080000UL /* Tomatillo */
#define BUS_ERROR_SNOOP_RDS 0x0000000000020000UL /* Tomatillo */
#define BUS_ERROR_SNOOP_RDSA 0x0000000000010000UL /* Tomatillo */
#define BUS_ERROR_SNOOP_OWN 0x0000000000008000UL /* Tomatillo */
#define BUS_ERROR_SNOOP_RDO 0x0000000000004000UL /* Tomatillo */
#define BUS_ERROR_CPU1PS 0x0000000000002000UL /* Safari */
#define BUS_ERROR_WDATA_PERR 0x0000000000002000UL /* Tomatillo */
#define BUS_ERROR_CPU1PB 0x0000000000001000UL /* Safari */
#define BUS_ERROR_CTRL_PERR 0x0000000000001000UL /* Tomatillo */
#define BUS_ERROR_CPU0PS 0x0000000000000800UL /* Safari */
#define BUS_ERROR_SNOOP_ERR 0x0000000000000800UL /* Tomatillo */
#define BUS_ERROR_CPU0PB 0x0000000000000400UL /* Safari */
#define BUS_ERROR_JBUS_ILL_B 0x0000000000000400UL /* Tomatillo */
#define BUS_ERROR_CIQTO 0x0000000000000200UL /* Safari */
#define BUS_ERROR_LPQTO 0x0000000000000100UL /* Safari */
#define BUS_ERROR_JBUS_ILL_C 0x0000000000000100UL /* Tomatillo */
#define BUS_ERROR_SFPQTO 0x0000000000000080UL /* Safari */
#define BUS_ERROR_UFPQTO 0x0000000000000040UL /* Safari */
#define BUS_ERROR_RD_PERR 0x0000000000000040UL /* Tomatillo */
#define BUS_ERROR_APERR 0x0000000000000020UL /* Safari/Tomatillo */
#define BUS_ERROR_UNMAP 0x0000000000000010UL /* Safari/Tomatillo */
#define BUS_ERROR_BUSERR 0x0000000000000004UL /* Safari/Tomatillo */
#define BUS_ERROR_TIMEOUT 0x0000000000000002UL /* Safari/Tomatillo */
#define BUS_ERROR_ILL 0x0000000000000001UL /* Safari */
/* We only expect UNMAP errors here. The rest of the Safari errors
* are marked fatal and thus cause a system reset.
*/
static irqreturn_t schizo_safarierr_intr(int irq, void *dev_id)
{
struct pci_pbm_info *pbm = dev_id;
struct pci_controller_info *p = pbm->parent;
u64 errlog;
errlog = schizo_read(pbm->controller_regs + SCHIZO_SAFARI_ERRLOG);
schizo_write(pbm->controller_regs + SCHIZO_SAFARI_ERRLOG,
errlog & ~(SAFARI_ERRLOG_ERROUT));
if (!(errlog & BUS_ERROR_UNMAP)) {
printk("%s: Unexpected Safari/JBUS error interrupt, errlog[%016lx]\n",
pbm->name, errlog);
return IRQ_HANDLED;
}
printk("%s: Safari/JBUS interrupt, UNMAPPED error, interrogating IOMMUs.\n",
pbm->name);
schizo_check_iommu_error(p, SAFARI_ERR);
return IRQ_HANDLED;
}
/* Nearly identical to PSYCHO equivalents... */
#define SCHIZO_ECC_CTRL 0x10020UL
#define SCHIZO_ECCCTRL_EE 0x8000000000000000UL /* Enable ECC Checking */
#define SCHIZO_ECCCTRL_UE 0x4000000000000000UL /* Enable UE Interrupts */
#define SCHIZO_ECCCTRL_CE 0x2000000000000000UL /* Enable CE INterrupts */
#define SCHIZO_SAFARI_ERRCTRL 0x10008UL
#define SCHIZO_SAFERRCTRL_EN 0x8000000000000000UL
#define SCHIZO_SAFARI_IRQCTRL 0x10010UL
#define SCHIZO_SAFIRQCTRL_EN 0x8000000000000000UL
static int pbm_routes_this_ino(struct pci_pbm_info *pbm, u32 ino)
{
ino &= IMAP_INO;
if (pbm->ino_bitmap & (1UL << ino))
return 1;
return 0;
}
/* How the Tomatillo IRQs are routed around is pure guesswork here.
*
* All the Tomatillo devices I see in prtconf dumps seem to have only
* a single PCI bus unit attached to it. It would seem they are seperate
* devices because their PortID (ie. JBUS ID) values are all different
* and thus the registers are mapped to totally different locations.
*
* However, two Tomatillo's look "similar" in that the only difference
* in their PortID is the lowest bit.
*
* So if we were to ignore this lower bit, it certainly looks like two
* PCI bus units of the same Tomatillo. I still have not really
* figured this out...
*/
static void tomatillo_register_error_handlers(struct pci_pbm_info *pbm)
{
struct of_device *op = of_find_device_by_node(pbm->prom_node);
u64 tmp, err_mask, err_no_mask;
int err;
/* Tomatillo IRQ property layout is:
* 0: PCIERR
* 1: UE ERR
* 2: CE ERR
* 3: SERR
* 4: POWER FAIL?
*/
if (pbm_routes_this_ino(pbm, SCHIZO_UE_INO)) {
err = request_irq(op->irqs[1], schizo_ue_intr, 0,
"TOMATILLO_UE", pbm);
if (err)
printk(KERN_WARNING "%s: Could not register UE, "
"err=%d\n", pbm->name, err);
}
if (pbm_routes_this_ino(pbm, SCHIZO_CE_INO)) {
err = request_irq(op->irqs[2], schizo_ce_intr, 0,
"TOMATILLO_CE", pbm);
if (err)
printk(KERN_WARNING "%s: Could not register CE, "
"err=%d\n", pbm->name, err);
}
err = 0;
if (pbm_routes_this_ino(pbm, SCHIZO_PCIERR_A_INO)) {
err = request_irq(op->irqs[0], schizo_pcierr_intr, 0,
"TOMATILLO_PCIERR", pbm);
} else if (pbm_routes_this_ino(pbm, SCHIZO_PCIERR_B_INO)) {
err = request_irq(op->irqs[0], schizo_pcierr_intr, 0,
"TOMATILLO_PCIERR", pbm);
}
if (err)
printk(KERN_WARNING "%s: Could not register PCIERR, "
"err=%d\n", pbm->name, err);
if (pbm_routes_this_ino(pbm, SCHIZO_SERR_INO)) {
err = request_irq(op->irqs[3], schizo_safarierr_intr, 0,
"TOMATILLO_SERR", pbm);
if (err)
printk(KERN_WARNING "%s: Could not register SERR, "
"err=%d\n", pbm->name, err);
}
/* Enable UE and CE interrupts for controller. */
schizo_write(pbm->controller_regs + SCHIZO_ECC_CTRL,
(SCHIZO_ECCCTRL_EE |
SCHIZO_ECCCTRL_UE |
SCHIZO_ECCCTRL_CE));
/* Enable PCI Error interrupts and clear error
* bits.
*/
err_mask = (SCHIZO_PCICTRL_BUS_UNUS |
SCHIZO_PCICTRL_TTO_ERR |
SCHIZO_PCICTRL_RTRY_ERR |
SCHIZO_PCICTRL_SERR |
SCHIZO_PCICTRL_EEN);
err_no_mask = SCHIZO_PCICTRL_DTO_ERR;
tmp = schizo_read(pbm->pbm_regs + SCHIZO_PCI_CTRL);
tmp |= err_mask;
tmp &= ~err_no_mask;
schizo_write(pbm->pbm_regs + SCHIZO_PCI_CTRL, tmp);
err_mask = (SCHIZO_PCIAFSR_PMA | SCHIZO_PCIAFSR_PTA |
SCHIZO_PCIAFSR_PRTRY | SCHIZO_PCIAFSR_PPERR |
SCHIZO_PCIAFSR_PTTO |
SCHIZO_PCIAFSR_SMA | SCHIZO_PCIAFSR_STA |
SCHIZO_PCIAFSR_SRTRY | SCHIZO_PCIAFSR_SPERR |
SCHIZO_PCIAFSR_STTO);
schizo_write(pbm->pbm_regs + SCHIZO_PCI_AFSR, err_mask);
err_mask = (BUS_ERROR_BADCMD | BUS_ERROR_SNOOP_GR |
BUS_ERROR_SNOOP_PCI | BUS_ERROR_SNOOP_RD |
BUS_ERROR_SNOOP_RDS | BUS_ERROR_SNOOP_RDSA |
BUS_ERROR_SNOOP_OWN | BUS_ERROR_SNOOP_RDO |
BUS_ERROR_WDATA_PERR | BUS_ERROR_CTRL_PERR |
BUS_ERROR_SNOOP_ERR | BUS_ERROR_JBUS_ILL_B |
BUS_ERROR_JBUS_ILL_C | BUS_ERROR_RD_PERR |
BUS_ERROR_APERR | BUS_ERROR_UNMAP |
BUS_ERROR_BUSERR | BUS_ERROR_TIMEOUT);
schizo_write(pbm->controller_regs + SCHIZO_SAFARI_ERRCTRL,
(SCHIZO_SAFERRCTRL_EN | err_mask));
schizo_write(pbm->controller_regs + SCHIZO_SAFARI_IRQCTRL,
(SCHIZO_SAFIRQCTRL_EN | (BUS_ERROR_UNMAP)));
}
static void schizo_register_error_handlers(struct pci_pbm_info *pbm)
{
struct of_device *op = of_find_device_by_node(pbm->prom_node);
u64 tmp, err_mask, err_no_mask;
int err;
/* Schizo IRQ property layout is:
* 0: PCIERR
* 1: UE ERR
* 2: CE ERR
* 3: SERR
* 4: POWER FAIL?
*/
if (pbm_routes_this_ino(pbm, SCHIZO_UE_INO)) {
err = request_irq(op->irqs[1], schizo_ue_intr, 0,
"SCHIZO_UE", pbm);
if (err)
printk(KERN_WARNING "%s: Could not register UE, "
"err=%d\n", pbm->name, err);
}
if (pbm_routes_this_ino(pbm, SCHIZO_CE_INO)) {
err = request_irq(op->irqs[2], schizo_ce_intr, 0,
"SCHIZO_CE", pbm);
if (err)
printk(KERN_WARNING "%s: Could not register CE, "
"err=%d\n", pbm->name, err);
}
err = 0;
if (pbm_routes_this_ino(pbm, SCHIZO_PCIERR_A_INO)) {
err = request_irq(op->irqs[0], schizo_pcierr_intr, 0,
"SCHIZO_PCIERR", pbm);
} else if (pbm_routes_this_ino(pbm, SCHIZO_PCIERR_B_INO)) {
err = request_irq(op->irqs[0], schizo_pcierr_intr, 0,
"SCHIZO_PCIERR", pbm);
}
if (err)
printk(KERN_WARNING "%s: Could not register PCIERR, "
"err=%d\n", pbm->name, err);
if (pbm_routes_this_ino(pbm, SCHIZO_SERR_INO)) {
err = request_irq(op->irqs[3], schizo_safarierr_intr, 0,
"SCHIZO_SERR", pbm);
if (err)
printk(KERN_WARNING "%s: Could not register SERR, "
"err=%d\n", pbm->name, err);
}
/* Enable UE and CE interrupts for controller. */
schizo_write(pbm->controller_regs + SCHIZO_ECC_CTRL,
(SCHIZO_ECCCTRL_EE |
SCHIZO_ECCCTRL_UE |
SCHIZO_ECCCTRL_CE));
err_mask = (SCHIZO_PCICTRL_BUS_UNUS |
SCHIZO_PCICTRL_ESLCK |
SCHIZO_PCICTRL_TTO_ERR |
SCHIZO_PCICTRL_RTRY_ERR |
SCHIZO_PCICTRL_SBH_ERR |
SCHIZO_PCICTRL_SERR |
SCHIZO_PCICTRL_EEN);
err_no_mask = (SCHIZO_PCICTRL_DTO_ERR |
SCHIZO_PCICTRL_SBH_INT);
/* Enable PCI Error interrupts and clear error
* bits for each PBM.
*/
tmp = schizo_read(pbm->pbm_regs + SCHIZO_PCI_CTRL);
tmp |= err_mask;
tmp &= ~err_no_mask;
schizo_write(pbm->pbm_regs + SCHIZO_PCI_CTRL, tmp);
schizo_write(pbm->pbm_regs + SCHIZO_PCI_AFSR,
(SCHIZO_PCIAFSR_PMA | SCHIZO_PCIAFSR_PTA |
SCHIZO_PCIAFSR_PRTRY | SCHIZO_PCIAFSR_PPERR |
SCHIZO_PCIAFSR_PTTO | SCHIZO_PCIAFSR_PUNUS |
SCHIZO_PCIAFSR_SMA | SCHIZO_PCIAFSR_STA |
SCHIZO_PCIAFSR_SRTRY | SCHIZO_PCIAFSR_SPERR |
SCHIZO_PCIAFSR_STTO | SCHIZO_PCIAFSR_SUNUS));
/* Make all Safari error conditions fatal except unmapped
* errors which we make generate interrupts.
*/
err_mask = (BUS_ERROR_BADCMD | BUS_ERROR_SSMDIS |
BUS_ERROR_BADMA | BUS_ERROR_BADMB |
BUS_ERROR_BADMC |
BUS_ERROR_CPU1PS | BUS_ERROR_CPU1PB |
BUS_ERROR_CPU0PS | BUS_ERROR_CPU0PB |
BUS_ERROR_CIQTO |
BUS_ERROR_LPQTO | BUS_ERROR_SFPQTO |
BUS_ERROR_UFPQTO | BUS_ERROR_APERR |
BUS_ERROR_BUSERR | BUS_ERROR_TIMEOUT |
BUS_ERROR_ILL);
#if 1
/* XXX Something wrong with some Excalibur systems
* XXX Sun is shipping. The behavior on a 2-cpu
* XXX machine is that both CPU1 parity error bits
* XXX are set and are immediately set again when
* XXX their error status bits are cleared. Just
* XXX ignore them for now. -DaveM
*/
err_mask &= ~(BUS_ERROR_CPU1PS | BUS_ERROR_CPU1PB |
BUS_ERROR_CPU0PS | BUS_ERROR_CPU0PB);
#endif
schizo_write(pbm->controller_regs + SCHIZO_SAFARI_ERRCTRL,
(SCHIZO_SAFERRCTRL_EN | err_mask));
}
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 = schizo_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 = schizo_pci_config_mkaddr(pbm, pbm->pci_first_busno,
0, PCI_LATENCY_TIMER);
pci_config_write8(addr, 64);
}
static void schizo_scan_bus(struct pci_pbm_info *pbm)
{
pbm_config_busmastering(pbm);
pbm->is_66mhz_capable =
(of_find_property(pbm->prom_node, "66mhz-capable", NULL)
!= NULL);
pbm->pci_bus = pci_scan_one_pbm(pbm);
if (pbm->chip_type == PBM_CHIP_TYPE_TOMATILLO)
tomatillo_register_error_handlers(pbm);
else
schizo_register_error_handlers(pbm);
}
#define SCHIZO_STRBUF_CONTROL (0x02800UL)
#define SCHIZO_STRBUF_FLUSH (0x02808UL)
#define SCHIZO_STRBUF_FSYNC (0x02810UL)
#define SCHIZO_STRBUF_CTXFLUSH (0x02818UL)
#define SCHIZO_STRBUF_CTXMATCH (0x10000UL)
static void schizo_pbm_strbuf_init(struct pci_pbm_info *pbm)
{
unsigned long base = pbm->pbm_regs;
u64 control;
if (pbm->chip_type == PBM_CHIP_TYPE_TOMATILLO) {
/* TOMATILLO lacks streaming cache. */
return;
}
/* SCHIZO has context flushing. */
pbm->stc.strbuf_control = base + SCHIZO_STRBUF_CONTROL;
pbm->stc.strbuf_pflush = base + SCHIZO_STRBUF_FLUSH;
pbm->stc.strbuf_fsync = base + SCHIZO_STRBUF_FSYNC;
pbm->stc.strbuf_ctxflush = base + SCHIZO_STRBUF_CTXFLUSH;
pbm->stc.strbuf_ctxmatch_base = base + SCHIZO_STRBUF_CTXMATCH;
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);
/* Turn off LRU locking and diag mode, enable the
* streaming buffer and leave the rerun-disable
* setting however OBP set it.
*/
control = schizo_read(pbm->stc.strbuf_control);
control &= ~(SCHIZO_STRBUF_CTRL_LPTR |
SCHIZO_STRBUF_CTRL_LENAB |
SCHIZO_STRBUF_CTRL_DENAB);
control |= SCHIZO_STRBUF_CTRL_ENAB;
schizo_write(pbm->stc.strbuf_control, control);
pbm->stc.strbuf_enabled = 1;
}
#define SCHIZO_IOMMU_CONTROL (0x00200UL)
#define SCHIZO_IOMMU_TSBBASE (0x00208UL)
#define SCHIZO_IOMMU_FLUSH (0x00210UL)
#define SCHIZO_IOMMU_CTXFLUSH (0x00218UL)
static int schizo_pbm_iommu_init(struct pci_pbm_info *pbm)
{
struct iommu *iommu = pbm->iommu;
unsigned long i, tagbase, database;
struct property *prop;
u32 vdma[2], dma_mask;
int tsbsize, err;
u64 control;
prop = of_find_property(pbm->prom_node, "virtual-dma", NULL);
if (prop) {
u32 *val = prop->value;
vdma[0] = val[0];
vdma[1] = val[1];
} else {
/* No property, use default values. */
vdma[0] = 0xc0000000;
vdma[1] = 0x40000000;
}
dma_mask = vdma[0];
switch (vdma[1]) {
case 0x20000000:
dma_mask |= 0x1fffffff;
tsbsize = 64;
break;
case 0x40000000:
dma_mask |= 0x3fffffff;
tsbsize = 128;
break;
case 0x80000000:
dma_mask |= 0x7fffffff;
tsbsize = 128;
break;
default:
prom_printf("SCHIZO: strange virtual-dma size.\n");
prom_halt();
};
/* Register addresses, SCHIZO has iommu ctx flushing. */
iommu->iommu_control = pbm->pbm_regs + SCHIZO_IOMMU_CONTROL;
iommu->iommu_tsbbase = pbm->pbm_regs + SCHIZO_IOMMU_TSBBASE;
iommu->iommu_flush = pbm->pbm_regs + SCHIZO_IOMMU_FLUSH;
iommu->iommu_tags = iommu->iommu_flush + (0xa580UL - 0x0210UL);
iommu->iommu_ctxflush = pbm->pbm_regs + SCHIZO_IOMMU_CTXFLUSH;
/* We use the main control/status register of SCHIZO as the write
* completion register.
*/
iommu->write_complete_reg = pbm->controller_regs + 0x10000UL;
/*
* Invalidate TLB Entries.
*/
control = schizo_read(iommu->iommu_control);
control |= SCHIZO_IOMMU_CTRL_DENAB;
schizo_write(iommu->iommu_control, control);
tagbase = SCHIZO_IOMMU_TAG, database = SCHIZO_IOMMU_DATA;
for(i = 0; i < 16; i++) {
schizo_write(pbm->pbm_regs + tagbase + (i * 8UL), 0);
schizo_write(pbm->pbm_regs + database + (i * 8UL), 0);
}
/* Leave diag mode enabled for full-flushing done
* in pci_iommu.c
*/
err = iommu_table_init(iommu, tsbsize * 8 * 1024, vdma[0], dma_mask);
if (err)
return err;
schizo_write(iommu->iommu_tsbbase, __pa(iommu->page_table));
control = schizo_read(iommu->iommu_control);
control &= ~(SCHIZO_IOMMU_CTRL_TSBSZ | SCHIZO_IOMMU_CTRL_TBWSZ);
switch (tsbsize) {
case 64:
control |= SCHIZO_IOMMU_TSBSZ_64K;
break;
case 128:
control |= SCHIZO_IOMMU_TSBSZ_128K;
break;
};
control |= SCHIZO_IOMMU_CTRL_ENAB;
schizo_write(iommu->iommu_control, control);
return 0;
}
#define SCHIZO_PCI_IRQ_RETRY (0x1a00UL)
#define SCHIZO_IRQ_RETRY_INF 0xffUL
#define SCHIZO_PCI_DIAG (0x2020UL)
#define SCHIZO_PCIDIAG_D_BADECC (1UL << 10UL) /* Disable BAD ECC errors (Schizo) */
#define SCHIZO_PCIDIAG_D_BYPASS (1UL << 9UL) /* Disable MMU bypass mode (Schizo/Tomatillo) */
#define SCHIZO_PCIDIAG_D_TTO (1UL << 8UL) /* Disable TTO errors (Schizo/Tomatillo) */
#define SCHIZO_PCIDIAG_D_RTRYARB (1UL << 7UL) /* Disable retry arbitration (Schizo) */
#define SCHIZO_PCIDIAG_D_RETRY (1UL << 6UL) /* Disable retry limit (Schizo/Tomatillo) */
#define SCHIZO_PCIDIAG_D_INTSYNC (1UL << 5UL) /* Disable interrupt/DMA synch (Schizo/Tomatillo) */
#define SCHIZO_PCIDIAG_I_DMA_PARITY (1UL << 3UL) /* Invert DMA parity (Schizo/Tomatillo) */
#define SCHIZO_PCIDIAG_I_PIOD_PARITY (1UL << 2UL) /* Invert PIO data parity (Schizo/Tomatillo) */
#define SCHIZO_PCIDIAG_I_PIOA_PARITY (1UL << 1UL) /* Invert PIO address parity (Schizo/Tomatillo) */
#define TOMATILLO_PCI_IOC_CSR (0x2248UL)
#define TOMATILLO_IOC_PART_WPENAB 0x0000000000080000UL
#define TOMATILLO_IOC_RDMULT_PENAB 0x0000000000040000UL
#define TOMATILLO_IOC_RDONE_PENAB 0x0000000000020000UL
#define TOMATILLO_IOC_RDLINE_PENAB 0x0000000000010000UL
#define TOMATILLO_IOC_RDMULT_PLEN 0x000000000000c000UL
#define TOMATILLO_IOC_RDMULT_PLEN_SHIFT 14UL
#define TOMATILLO_IOC_RDONE_PLEN 0x0000000000003000UL
#define TOMATILLO_IOC_RDONE_PLEN_SHIFT 12UL
#define TOMATILLO_IOC_RDLINE_PLEN 0x0000000000000c00UL
#define TOMATILLO_IOC_RDLINE_PLEN_SHIFT 10UL
#define TOMATILLO_IOC_PREF_OFF 0x00000000000003f8UL
#define TOMATILLO_IOC_PREF_OFF_SHIFT 3UL
#define TOMATILLO_IOC_RDMULT_CPENAB 0x0000000000000004UL
#define TOMATILLO_IOC_RDONE_CPENAB 0x0000000000000002UL
#define TOMATILLO_IOC_RDLINE_CPENAB 0x0000000000000001UL
#define TOMATILLO_PCI_IOC_TDIAG (0x2250UL)
#define TOMATILLO_PCI_IOC_DDIAG (0x2290UL)
static void schizo_pbm_hw_init(struct pci_pbm_info *pbm)
{
struct property *prop;
u64 tmp;
schizo_write(pbm->pbm_regs + SCHIZO_PCI_IRQ_RETRY, 5);
tmp = schizo_read(pbm->pbm_regs + SCHIZO_PCI_CTRL);
/* Enable arbiter for all PCI slots. */
tmp |= 0xff;
if (pbm->chip_type == PBM_CHIP_TYPE_TOMATILLO &&
pbm->chip_version >= 0x2)
tmp |= 0x3UL << SCHIZO_PCICTRL_PTO_SHIFT;
prop = of_find_property(pbm->prom_node, "no-bus-parking", NULL);
if (!prop)
tmp |= SCHIZO_PCICTRL_PARK;
else
tmp &= ~SCHIZO_PCICTRL_PARK;
if (pbm->chip_type == PBM_CHIP_TYPE_TOMATILLO &&
pbm->chip_version <= 0x1)
tmp |= SCHIZO_PCICTRL_DTO_INT;
else
tmp &= ~SCHIZO_PCICTRL_DTO_INT;
if (pbm->chip_type == PBM_CHIP_TYPE_TOMATILLO)
tmp |= (SCHIZO_PCICTRL_MRM_PREF |
SCHIZO_PCICTRL_RDO_PREF |
SCHIZO_PCICTRL_RDL_PREF);
schizo_write(pbm->pbm_regs + SCHIZO_PCI_CTRL, tmp);
tmp = schizo_read(pbm->pbm_regs + SCHIZO_PCI_DIAG);
tmp &= ~(SCHIZO_PCIDIAG_D_RTRYARB |
SCHIZO_PCIDIAG_D_RETRY |
SCHIZO_PCIDIAG_D_INTSYNC);
schizo_write(pbm->pbm_regs + SCHIZO_PCI_DIAG, tmp);
if (pbm->chip_type == PBM_CHIP_TYPE_TOMATILLO) {
/* Clear prefetch lengths to workaround a bug in
* Jalapeno...
*/
tmp = (TOMATILLO_IOC_PART_WPENAB |
(1 << TOMATILLO_IOC_PREF_OFF_SHIFT) |
TOMATILLO_IOC_RDMULT_CPENAB |
TOMATILLO_IOC_RDONE_CPENAB |
TOMATILLO_IOC_RDLINE_CPENAB);
schizo_write(pbm->pbm_regs + TOMATILLO_PCI_IOC_CSR,
tmp);
}
}
static int schizo_pbm_init(struct pci_controller_info *p,
struct device_node *dp, u32 portid,
int chip_type)
{
const struct linux_prom64_registers *regs;
struct pci_pbm_info *pbm;
const char *chipset_name;
int is_pbm_a, err;
switch (chip_type) {
case PBM_CHIP_TYPE_TOMATILLO:
chipset_name = "TOMATILLO";
break;
case PBM_CHIP_TYPE_SCHIZO_PLUS:
chipset_name = "SCHIZO+";
break;
case PBM_CHIP_TYPE_SCHIZO:
default:
chipset_name = "SCHIZO";
break;
};
/* For SCHIZO, three OBP regs:
* 1) PBM controller regs
* 2) Schizo front-end controller regs (same for both PBMs)
* 3) PBM PCI config space
*
* For TOMATILLO, four OBP regs:
* 1) PBM controller regs
* 2) Tomatillo front-end controller regs
* 3) PBM PCI config space
* 4) Ichip regs
*/
regs = of_get_property(dp, "reg", NULL);
is_pbm_a = ((regs[0].phys_addr & 0x00700000) == 0x00600000);
if (is_pbm_a)
pbm = &p->pbm_A;
else
pbm = &p->pbm_B;
pbm->next = pci_pbm_root;
pci_pbm_root = pbm;
pbm->scan_bus = schizo_scan_bus;
pbm->pci_ops = &sun4u_pci_ops;
pbm->config_space_reg_bits = 8;
pbm->index = pci_num_pbms++;
pbm->portid = portid;
pbm->parent = p;
pbm->prom_node = dp;
pbm->chip_type = chip_type;
pbm->chip_version = of_getintprop_default(dp, "version#", 0);
pbm->chip_revision = of_getintprop_default(dp, "module-version#", 0);
pbm->pbm_regs = regs[0].phys_addr;
pbm->controller_regs = regs[1].phys_addr - 0x10000UL;
if (chip_type == PBM_CHIP_TYPE_TOMATILLO)
pbm->sync_reg = regs[3].phys_addr + 0x1a18UL;
pbm->name = dp->full_name;
printk("%s: %s PCI Bus Module ver[%x:%x]\n",
pbm->name, chipset_name,
pbm->chip_version, pbm->chip_revision);
schizo_pbm_hw_init(pbm);
pci_determine_mem_io_space(pbm);
pci_get_pbm_props(pbm);
err = schizo_pbm_iommu_init(pbm);
if (err)
return err;
schizo_pbm_strbuf_init(pbm);
return 0;
}
static inline int portid_compare(u32 x, u32 y, int chip_type)
{
if (chip_type == PBM_CHIP_TYPE_TOMATILLO) {
if (x == (y ^ 1))
return 1;
return 0;
}
return (x == y);
}
static void __schizo_init(struct device_node *dp, char *model_name, int chip_type)
{
struct pci_controller_info *p;
struct pci_pbm_info *pbm;
struct iommu *iommu;
u32 portid;
portid = of_getintprop_default(dp, "portid", 0xff);
for (pbm = pci_pbm_root; pbm; pbm = pbm->next) {
if (portid_compare(pbm->portid, portid, chip_type)) {
if (schizo_pbm_init(pbm->parent, dp,
portid, chip_type))
goto fatal_memory_error;
return;
}
}
p = kzalloc(sizeof(struct pci_controller_info), GFP_ATOMIC);
if (!p)
goto fatal_memory_error;
iommu = kzalloc(sizeof(struct iommu), GFP_ATOMIC);
if (!iommu)
goto fatal_memory_error;
p->pbm_A.iommu = iommu;
iommu = kzalloc(sizeof(struct iommu), GFP_ATOMIC);
if (!iommu)
goto fatal_memory_error;
p->pbm_B.iommu = iommu;
/* Like PSYCHO we have a 2GB aligned area for memory space. */
pci_memspace_mask = 0x7fffffffUL;
if (schizo_pbm_init(p, dp, portid, chip_type))
goto fatal_memory_error;
return;
fatal_memory_error:
prom_printf("SCHIZO: Fatal memory allocation error.\n");
prom_halt();
}
void schizo_init(struct device_node *dp, char *model_name)
{
__schizo_init(dp, model_name, PBM_CHIP_TYPE_SCHIZO);
}
void schizo_plus_init(struct device_node *dp, char *model_name)
{
__schizo_init(dp, model_name, PBM_CHIP_TYPE_SCHIZO_PLUS);
}
void tomatillo_init(struct device_node *dp, char *model_name)
{
__schizo_init(dp, model_name, PBM_CHIP_TYPE_TOMATILLO);
}
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