![David S. Miller](/assets/img/avatar_default.png)
All the sun4u controllers do the same thing to compute the physical I/O address to poke, and we can move the sun4v code into this common location too. This one needs a bit of testing, in particular the Sabre code had some funny stuff that would break up u16 and/or u32 accesses into pieces and I didn't think that was needed any more. If it is we need to find out why and add back code to do it again. Signed-off-by: David S. Miller <davem@davemloft.net>
1070 lines
37 KiB
C
1070 lines
37 KiB
C
/* 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 <asm/iommu.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/starfire.h>
|
|
#include <asm/prom.h>
|
|
#include <asm/of_device.h>
|
|
#include <asm/oplib.h>
|
|
|
|
#include "pci_impl.h"
|
|
#include "iommu_common.h"
|
|
|
|
/* 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_one_stc(struct pci_pbm_info *pbm,
|
|
int is_pbm_a)
|
|
{
|
|
struct strbuf *strbuf = &pbm->stc;
|
|
unsigned long regbase = pbm->controller_regs;
|
|
unsigned long err_base, tag_base, line_base;
|
|
u64 control;
|
|
int i;
|
|
|
|
if (is_pbm_a) {
|
|
err_base = regbase + PSYCHO_STC_ERR_A;
|
|
tag_base = regbase + PSYCHO_STC_TAG_A;
|
|
line_base = regbase + PSYCHO_STC_LINE_A;
|
|
} else {
|
|
err_base = regbase + PSYCHO_STC_ERR_B;
|
|
tag_base = regbase + PSYCHO_STC_TAG_B;
|
|
line_base = regbase + PSYCHO_STC_LINE_B;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
static void __psycho_check_stc_error(struct pci_pbm_info *pbm,
|
|
unsigned long afsr,
|
|
unsigned long afar,
|
|
enum psycho_error_type type)
|
|
{
|
|
__psycho_check_one_stc(pbm,
|
|
(pbm == &pbm->parent->pbm_A));
|
|
}
|
|
|
|
/* 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, afsr, afar, type);
|
|
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;
|
|
struct pci_controller_info *p = pbm->parent;
|
|
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(&p->pbm_A, afsr, afar, UE_ERR);
|
|
psycho_check_iommu_error(&p->pbm_B, 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, int is_pbm_a)
|
|
{
|
|
unsigned long csr_reg, csr, csr_error_bits;
|
|
irqreturn_t ret = IRQ_NONE;
|
|
u16 stat;
|
|
|
|
if (is_pbm_a) {
|
|
csr_reg = pbm->controller_regs + PSYCHO_PCIA_CTRL;
|
|
} else {
|
|
csr_reg = pbm->controller_regs + PSYCHO_PCIB_CTRL;
|
|
}
|
|
csr = psycho_read(csr_reg);
|
|
csr_error_bits =
|
|
csr & (PSYCHO_PCICTRL_SBH_ERR | PSYCHO_PCICTRL_SERR);
|
|
if (csr_error_bits) {
|
|
/* Clear the errors. */
|
|
psycho_write(csr_reg, 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;
|
|
struct pci_controller_info *p = pbm->parent;
|
|
unsigned long afsr_reg, afar_reg;
|
|
unsigned long afsr, afar, error_bits;
|
|
int is_pbm_a, reported;
|
|
|
|
is_pbm_a = (pbm == &pbm->parent->pbm_A);
|
|
if (is_pbm_a) {
|
|
afsr_reg = p->pbm_A.controller_regs + PSYCHO_PCI_AFSR_A;
|
|
afar_reg = p->pbm_A.controller_regs + PSYCHO_PCI_AFAR_A;
|
|
} else {
|
|
afsr_reg = p->pbm_A.controller_regs + PSYCHO_PCI_AFSR_B;
|
|
afar_reg = p->pbm_A.controller_regs + PSYCHO_PCI_AFAR_B;
|
|
}
|
|
|
|
/* 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, is_pbm_a);
|
|
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->prom_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 psycho_scan_bus(struct pci_pbm_info *pbm)
|
|
{
|
|
pbm_config_busmastering(pbm);
|
|
pbm->is_66mhz_capable = 0;
|
|
pbm->pci_bus = pci_scan_one_pbm(pbm);
|
|
|
|
/* After the PCI bus scan is complete, we can register
|
|
* the error interrupt handlers.
|
|
*/
|
|
psycho_register_error_handlers(pbm);
|
|
}
|
|
|
|
static void psycho_iommu_init(struct pci_pbm_info *pbm)
|
|
{
|
|
struct iommu *iommu = pbm->iommu;
|
|
unsigned long i;
|
|
u64 control;
|
|
|
|
/* Register addresses. */
|
|
iommu->iommu_control = pbm->controller_regs + PSYCHO_IOMMU_CONTROL;
|
|
iommu->iommu_tsbbase = pbm->controller_regs + PSYCHO_IOMMU_TSBBASE;
|
|
iommu->iommu_flush = pbm->controller_regs + PSYCHO_IOMMU_FLUSH;
|
|
/* PSYCHO's IOMMU lacks ctx flushing. */
|
|
iommu->iommu_ctxflush = 0;
|
|
|
|
/* We use the main control register of PSYCHO as the write
|
|
* completion register.
|
|
*/
|
|
iommu->write_complete_reg = pbm->controller_regs + PSYCHO_CONTROL;
|
|
|
|
/*
|
|
* Invalidate TLB Entries.
|
|
*/
|
|
control = psycho_read(pbm->controller_regs + PSYCHO_IOMMU_CONTROL);
|
|
control |= PSYCHO_IOMMU_CTRL_DENAB;
|
|
psycho_write(pbm->controller_regs + PSYCHO_IOMMU_CONTROL, control);
|
|
for(i = 0; i < 16; i++) {
|
|
psycho_write(pbm->controller_regs + PSYCHO_IOMMU_TAG + (i * 8UL), 0);
|
|
psycho_write(pbm->controller_regs + PSYCHO_IOMMU_DATA + (i * 8UL), 0);
|
|
}
|
|
|
|
/* Leave diag mode enabled for full-flushing done
|
|
* in pci_iommu.c
|
|
*/
|
|
pci_iommu_table_init(iommu, IO_TSB_SIZE, 0xc0000000, 0xffffffff);
|
|
|
|
psycho_write(pbm->controller_regs + PSYCHO_IOMMU_TSBBASE,
|
|
__pa(iommu->page_table));
|
|
|
|
control = psycho_read(pbm->controller_regs + PSYCHO_IOMMU_CONTROL);
|
|
control &= ~(PSYCHO_IOMMU_CTRL_TSBSZ | PSYCHO_IOMMU_CTRL_TBWSZ);
|
|
control |= (PSYCHO_IOMMU_TSBSZ_128K | PSYCHO_IOMMU_CTRL_ENAB);
|
|
psycho_write(pbm->controller_regs + PSYCHO_IOMMU_CONTROL, control);
|
|
|
|
/* If necessary, hook us up for starfire IRQ translations. */
|
|
if (this_is_starfire)
|
|
starfire_hookup(pbm->portid);
|
|
}
|
|
|
|
#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;
|
|
} 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;
|
|
}
|
|
/* 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 psycho_pbm_init(struct pci_controller_info *p,
|
|
struct device_node *dp, int is_pbm_a)
|
|
{
|
|
struct property *prop;
|
|
struct pci_pbm_info *pbm;
|
|
|
|
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 = psycho_scan_bus;
|
|
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 = 0;
|
|
prop = of_find_property(dp, "version#", NULL);
|
|
if (prop)
|
|
pbm->chip_version = *(int *) prop->value;
|
|
pbm->chip_revision = 0;
|
|
prop = of_find_property(dp, "module-revision#", NULL);
|
|
if (prop)
|
|
pbm->chip_revision = *(int *) prop->value;
|
|
|
|
pbm->parent = p;
|
|
pbm->prom_node = dp;
|
|
pbm->name = dp->full_name;
|
|
|
|
printk("%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);
|
|
}
|
|
|
|
#define PSYCHO_CONFIGSPACE 0x001000000UL
|
|
|
|
void psycho_init(struct device_node *dp, char *model_name)
|
|
{
|
|
struct linux_prom64_registers *pr_regs;
|
|
struct pci_controller_info *p;
|
|
struct pci_pbm_info *pbm;
|
|
struct iommu *iommu;
|
|
struct property *prop;
|
|
u32 upa_portid;
|
|
int is_pbm_a;
|
|
|
|
upa_portid = 0xff;
|
|
prop = of_find_property(dp, "upa-portid", NULL);
|
|
if (prop)
|
|
upa_portid = *(u32 *) prop->value;
|
|
|
|
for (pbm = pci_pbm_root; pbm; pbm = pbm->next) {
|
|
struct pci_controller_info *p = pbm->parent;
|
|
|
|
if (p->pbm_A.portid == upa_portid) {
|
|
is_pbm_a = (p->pbm_A.prom_node == NULL);
|
|
psycho_pbm_init(p, dp, is_pbm_a);
|
|
return;
|
|
}
|
|
}
|
|
|
|
p = kzalloc(sizeof(struct pci_controller_info), GFP_ATOMIC);
|
|
if (!p) {
|
|
prom_printf("PSYCHO: Fatal memory allocation error.\n");
|
|
prom_halt();
|
|
}
|
|
iommu = kzalloc(sizeof(struct iommu), GFP_ATOMIC);
|
|
if (!iommu) {
|
|
prom_printf("PSYCHO: Fatal memory allocation error.\n");
|
|
prom_halt();
|
|
}
|
|
p->pbm_A.iommu = p->pbm_B.iommu = iommu;
|
|
|
|
p->pbm_A.portid = upa_portid;
|
|
p->pbm_B.portid = upa_portid;
|
|
|
|
prop = of_find_property(dp, "reg", NULL);
|
|
pr_regs = prop->value;
|
|
|
|
p->pbm_A.controller_regs = pr_regs[2].phys_addr;
|
|
p->pbm_B.controller_regs = pr_regs[2].phys_addr;
|
|
|
|
p->pbm_A.config_space = p->pbm_B.config_space =
|
|
(pr_regs[2].phys_addr + PSYCHO_CONFIGSPACE);
|
|
|
|
/*
|
|
* Psycho's PCI MEM space is mapped to a 2GB aligned area, so
|
|
* we need to adjust our MEM space mask.
|
|
*/
|
|
pci_memspace_mask = 0x7fffffffUL;
|
|
|
|
psycho_controller_hwinit(&p->pbm_A);
|
|
|
|
psycho_iommu_init(&p->pbm_A);
|
|
|
|
is_pbm_a = ((pr_regs[0].phys_addr & 0x6000) == 0x2000);
|
|
psycho_pbm_init(p, dp, is_pbm_a);
|
|
}
|