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linux_dsm_epyc7002/arch/sparc64/kernel/pci_sabre.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

866 lines
28 KiB
C
Raw Blame History

/* pci_sabre.c: Sabre 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/apb.h>
#include <asm/iommu.h>
#include <asm/irq.h>
#include <asm/smp.h>
#include <asm/oplib.h>
#include <asm/prom.h>
#include <asm/of_device.h>
#include "pci_impl.h"
#include "iommu_common.h"
/* All SABRE registers are 64-bits. The following accessor
* routines are how they are accessed. The REG parameter
* is a physical address.
*/
#define sabre_read(__reg) \
({ u64 __ret; \
__asm__ __volatile__("ldxa [%1] %2, %0" \
: "=r" (__ret) \
: "r" (__reg), "i" (ASI_PHYS_BYPASS_EC_E) \
: "memory"); \
__ret; \
})
#define sabre_write(__reg, __val) \
__asm__ __volatile__("stxa %0, [%1] %2" \
: /* no outputs */ \
: "r" (__val), "r" (__reg), \
"i" (ASI_PHYS_BYPASS_EC_E) \
: "memory")
/* SABRE PCI controller register offsets and definitions. */
#define SABRE_UE_AFSR 0x0030UL
#define SABRE_UEAFSR_PDRD 0x4000000000000000UL /* Primary PCI DMA Read */
#define SABRE_UEAFSR_PDWR 0x2000000000000000UL /* Primary PCI DMA Write */
#define SABRE_UEAFSR_SDRD 0x0800000000000000UL /* Secondary PCI DMA Read */
#define SABRE_UEAFSR_SDWR 0x0400000000000000UL /* Secondary PCI DMA Write */
#define SABRE_UEAFSR_SDTE 0x0200000000000000UL /* Secondary DMA Translation Error */
#define SABRE_UEAFSR_PDTE 0x0100000000000000UL /* Primary DMA Translation Error */
#define SABRE_UEAFSR_BMSK 0x0000ffff00000000UL /* Bytemask */
#define SABRE_UEAFSR_OFF 0x00000000e0000000UL /* Offset (AFAR bits [5:3] */
#define SABRE_UEAFSR_BLK 0x0000000000800000UL /* Was block operation */
#define SABRE_UECE_AFAR 0x0038UL
#define SABRE_CE_AFSR 0x0040UL
#define SABRE_CEAFSR_PDRD 0x4000000000000000UL /* Primary PCI DMA Read */
#define SABRE_CEAFSR_PDWR 0x2000000000000000UL /* Primary PCI DMA Write */
#define SABRE_CEAFSR_SDRD 0x0800000000000000UL /* Secondary PCI DMA Read */
#define SABRE_CEAFSR_SDWR 0x0400000000000000UL /* Secondary PCI DMA Write */
#define SABRE_CEAFSR_ESYND 0x00ff000000000000UL /* ECC Syndrome */
#define SABRE_CEAFSR_BMSK 0x0000ffff00000000UL /* Bytemask */
#define SABRE_CEAFSR_OFF 0x00000000e0000000UL /* Offset */
#define SABRE_CEAFSR_BLK 0x0000000000800000UL /* Was block operation */
#define SABRE_UECE_AFAR_ALIAS 0x0048UL /* Aliases to 0x0038 */
#define SABRE_IOMMU_CONTROL 0x0200UL
#define SABRE_IOMMUCTRL_ERRSTS 0x0000000006000000UL /* Error status bits */
#define SABRE_IOMMUCTRL_ERR 0x0000000001000000UL /* Error present in IOTLB */
#define SABRE_IOMMUCTRL_LCKEN 0x0000000000800000UL /* IOTLB lock enable */
#define SABRE_IOMMUCTRL_LCKPTR 0x0000000000780000UL /* IOTLB lock pointer */
#define SABRE_IOMMUCTRL_TSBSZ 0x0000000000070000UL /* TSB Size */
#define SABRE_IOMMU_TSBSZ_1K 0x0000000000000000
#define SABRE_IOMMU_TSBSZ_2K 0x0000000000010000
#define SABRE_IOMMU_TSBSZ_4K 0x0000000000020000
#define SABRE_IOMMU_TSBSZ_8K 0x0000000000030000
#define SABRE_IOMMU_TSBSZ_16K 0x0000000000040000
#define SABRE_IOMMU_TSBSZ_32K 0x0000000000050000
#define SABRE_IOMMU_TSBSZ_64K 0x0000000000060000
#define SABRE_IOMMU_TSBSZ_128K 0x0000000000070000
#define SABRE_IOMMUCTRL_TBWSZ 0x0000000000000004UL /* TSB assumed page size */
#define SABRE_IOMMUCTRL_DENAB 0x0000000000000002UL /* Diagnostic Mode Enable */
#define SABRE_IOMMUCTRL_ENAB 0x0000000000000001UL /* IOMMU Enable */
#define SABRE_IOMMU_TSBBASE 0x0208UL
#define SABRE_IOMMU_FLUSH 0x0210UL
#define SABRE_IMAP_A_SLOT0 0x0c00UL
#define SABRE_IMAP_B_SLOT0 0x0c20UL
#define SABRE_IMAP_SCSI 0x1000UL
#define SABRE_IMAP_ETH 0x1008UL
#define SABRE_IMAP_BPP 0x1010UL
#define SABRE_IMAP_AU_REC 0x1018UL
#define SABRE_IMAP_AU_PLAY 0x1020UL
#define SABRE_IMAP_PFAIL 0x1028UL
#define SABRE_IMAP_KMS 0x1030UL
#define SABRE_IMAP_FLPY 0x1038UL
#define SABRE_IMAP_SHW 0x1040UL
#define SABRE_IMAP_KBD 0x1048UL
#define SABRE_IMAP_MS 0x1050UL
#define SABRE_IMAP_SER 0x1058UL
#define SABRE_IMAP_UE 0x1070UL
#define SABRE_IMAP_CE 0x1078UL
#define SABRE_IMAP_PCIERR 0x1080UL
#define SABRE_IMAP_GFX 0x1098UL
#define SABRE_IMAP_EUPA 0x10a0UL
#define SABRE_ICLR_A_SLOT0 0x1400UL
#define SABRE_ICLR_B_SLOT0 0x1480UL
#define SABRE_ICLR_SCSI 0x1800UL
#define SABRE_ICLR_ETH 0x1808UL
#define SABRE_ICLR_BPP 0x1810UL
#define SABRE_ICLR_AU_REC 0x1818UL
#define SABRE_ICLR_AU_PLAY 0x1820UL
#define SABRE_ICLR_PFAIL 0x1828UL
#define SABRE_ICLR_KMS 0x1830UL
#define SABRE_ICLR_FLPY 0x1838UL
#define SABRE_ICLR_SHW 0x1840UL
#define SABRE_ICLR_KBD 0x1848UL
#define SABRE_ICLR_MS 0x1850UL
#define SABRE_ICLR_SER 0x1858UL
#define SABRE_ICLR_UE 0x1870UL
#define SABRE_ICLR_CE 0x1878UL
#define SABRE_ICLR_PCIERR 0x1880UL
#define SABRE_WRSYNC 0x1c20UL
#define SABRE_PCICTRL 0x2000UL
#define SABRE_PCICTRL_MRLEN 0x0000001000000000UL /* Use MemoryReadLine for block loads/stores */
#define SABRE_PCICTRL_SERR 0x0000000400000000UL /* Set when SERR asserted on PCI bus */
#define SABRE_PCICTRL_ARBPARK 0x0000000000200000UL /* Bus Parking 0=Ultra-IIi 1=prev-bus-owner */
#define SABRE_PCICTRL_CPUPRIO 0x0000000000100000UL /* Ultra-IIi granted every other bus cycle */
#define SABRE_PCICTRL_ARBPRIO 0x00000000000f0000UL /* Slot which is granted every other bus cycle */
#define SABRE_PCICTRL_ERREN 0x0000000000000100UL /* PCI Error Interrupt Enable */
#define SABRE_PCICTRL_RTRYWE 0x0000000000000080UL /* DMA Flow Control 0=wait-if-possible 1=retry */
#define SABRE_PCICTRL_AEN 0x000000000000000fUL /* Slot PCI arbitration enables */
#define SABRE_PIOAFSR 0x2010UL
#define SABRE_PIOAFSR_PMA 0x8000000000000000UL /* Primary Master Abort */
#define SABRE_PIOAFSR_PTA 0x4000000000000000UL /* Primary Target Abort */
#define SABRE_PIOAFSR_PRTRY 0x2000000000000000UL /* Primary Excessive Retries */
#define SABRE_PIOAFSR_PPERR 0x1000000000000000UL /* Primary Parity Error */
#define SABRE_PIOAFSR_SMA 0x0800000000000000UL /* Secondary Master Abort */
#define SABRE_PIOAFSR_STA 0x0400000000000000UL /* Secondary Target Abort */
#define SABRE_PIOAFSR_SRTRY 0x0200000000000000UL /* Secondary Excessive Retries */
#define SABRE_PIOAFSR_SPERR 0x0100000000000000UL /* Secondary Parity Error */
#define SABRE_PIOAFSR_BMSK 0x0000ffff00000000UL /* Byte Mask */
#define SABRE_PIOAFSR_BLK 0x0000000080000000UL /* Was Block Operation */
#define SABRE_PIOAFAR 0x2018UL
#define SABRE_PCIDIAG 0x2020UL
#define SABRE_PCIDIAG_DRTRY 0x0000000000000040UL /* Disable PIO Retry Limit */
#define SABRE_PCIDIAG_IPAPAR 0x0000000000000008UL /* Invert PIO Address Parity */
#define SABRE_PCIDIAG_IPDPAR 0x0000000000000004UL /* Invert PIO Data Parity */
#define SABRE_PCIDIAG_IDDPAR 0x0000000000000002UL /* Invert DMA Data Parity */
#define SABRE_PCIDIAG_ELPBK 0x0000000000000001UL /* Loopback Enable - not supported */
#define SABRE_PCITASR 0x2028UL
#define SABRE_PCITASR_EF 0x0000000000000080UL /* Respond to 0xe0000000-0xffffffff */
#define SABRE_PCITASR_CD 0x0000000000000040UL /* Respond to 0xc0000000-0xdfffffff */
#define SABRE_PCITASR_AB 0x0000000000000020UL /* Respond to 0xa0000000-0xbfffffff */
#define SABRE_PCITASR_89 0x0000000000000010UL /* Respond to 0x80000000-0x9fffffff */
#define SABRE_PCITASR_67 0x0000000000000008UL /* Respond to 0x60000000-0x7fffffff */
#define SABRE_PCITASR_45 0x0000000000000004UL /* Respond to 0x40000000-0x5fffffff */
#define SABRE_PCITASR_23 0x0000000000000002UL /* Respond to 0x20000000-0x3fffffff */
#define SABRE_PCITASR_01 0x0000000000000001UL /* Respond to 0x00000000-0x1fffffff */
#define SABRE_PIOBUF_DIAG 0x5000UL
#define SABRE_DMABUF_DIAGLO 0x5100UL
#define SABRE_DMABUF_DIAGHI 0x51c0UL
#define SABRE_IMAP_GFX_ALIAS 0x6000UL /* Aliases to 0x1098 */
#define SABRE_IMAP_EUPA_ALIAS 0x8000UL /* Aliases to 0x10a0 */
#define SABRE_IOMMU_VADIAG 0xa400UL
#define SABRE_IOMMU_TCDIAG 0xa408UL
#define SABRE_IOMMU_TAG 0xa580UL
#define SABRE_IOMMUTAG_ERRSTS 0x0000000001800000UL /* Error status bits */
#define SABRE_IOMMUTAG_ERR 0x0000000000400000UL /* Error present */
#define SABRE_IOMMUTAG_WRITE 0x0000000000200000UL /* Page is writable */
#define SABRE_IOMMUTAG_STREAM 0x0000000000100000UL /* Streamable bit - unused */
#define SABRE_IOMMUTAG_SIZE 0x0000000000080000UL /* 0=8k 1=16k */
#define SABRE_IOMMUTAG_VPN 0x000000000007ffffUL /* Virtual Page Number [31:13] */
#define SABRE_IOMMU_DATA 0xa600UL
#define SABRE_IOMMUDATA_VALID 0x0000000040000000UL /* Valid */
#define SABRE_IOMMUDATA_USED 0x0000000020000000UL /* Used (for LRU algorithm) */
#define SABRE_IOMMUDATA_CACHE 0x0000000010000000UL /* Cacheable */
#define SABRE_IOMMUDATA_PPN 0x00000000001fffffUL /* Physical Page Number [33:13] */
#define SABRE_PCI_IRQSTATE 0xa800UL
#define SABRE_OBIO_IRQSTATE 0xa808UL
#define SABRE_FFBCFG 0xf000UL
#define SABRE_FFBCFG_SPRQS 0x000000000f000000 /* Slave P_RQST queue size */
#define SABRE_FFBCFG_ONEREAD 0x0000000000004000 /* Slave supports one outstanding read */
#define SABRE_MCCTRL0 0xf010UL
#define SABRE_MCCTRL0_RENAB 0x0000000080000000 /* Refresh Enable */
#define SABRE_MCCTRL0_EENAB 0x0000000010000000 /* Enable all ECC functions */
#define SABRE_MCCTRL0_11BIT 0x0000000000001000 /* Enable 11-bit column addressing */
#define SABRE_MCCTRL0_DPP 0x0000000000000f00 /* DIMM Pair Present Bits */
#define SABRE_MCCTRL0_RINTVL 0x00000000000000ff /* Refresh Interval */
#define SABRE_MCCTRL1 0xf018UL
#define SABRE_MCCTRL1_AMDC 0x0000000038000000 /* Advance Memdata Clock */
#define SABRE_MCCTRL1_ARDC 0x0000000007000000 /* Advance DRAM Read Data Clock */
#define SABRE_MCCTRL1_CSR 0x0000000000e00000 /* CAS to RAS delay for CBR refresh */
#define SABRE_MCCTRL1_CASRW 0x00000000001c0000 /* CAS length for read/write */
#define SABRE_MCCTRL1_RCD 0x0000000000038000 /* RAS to CAS delay */
#define SABRE_MCCTRL1_CP 0x0000000000007000 /* CAS Precharge */
#define SABRE_MCCTRL1_RP 0x0000000000000e00 /* RAS Precharge */
#define SABRE_MCCTRL1_RAS 0x00000000000001c0 /* Length of RAS for refresh */
#define SABRE_MCCTRL1_CASRW2 0x0000000000000038 /* Must be same as CASRW */
#define SABRE_MCCTRL1_RSC 0x0000000000000007 /* RAS after CAS hold time */
#define SABRE_RESETCTRL 0xf020UL
#define SABRE_CONFIGSPACE 0x001000000UL
#define SABRE_IOSPACE 0x002000000UL
#define SABRE_IOSPACE_SIZE 0x000ffffffUL
#define SABRE_MEMSPACE 0x100000000UL
#define SABRE_MEMSPACE_SIZE 0x07fffffffUL
static int hummingbird_p;
static struct pci_bus *sabre_root_bus;
/* SABRE error handling support. */
static void sabre_check_iommu_error(struct pci_pbm_info *pbm,
unsigned long afsr,
unsigned long afar)
{
struct iommu *iommu = pbm->iommu;
unsigned long iommu_tag[16];
unsigned long iommu_data[16];
unsigned long flags;
u64 control;
int i;
spin_lock_irqsave(&iommu->lock, flags);
control = sabre_read(iommu->iommu_control);
if (control & SABRE_IOMMUCTRL_ERR) {
char *type_string;
/* Clear the error encountered bit.
* NOTE: On Sabre this is write 1 to clear,
* which is different from Psycho.
*/
sabre_write(iommu->iommu_control, control);
switch((control & SABRE_IOMMUCTRL_ERRSTS) >> 25UL) {
case 1:
type_string = "Invalid Error";
break;
case 3:
type_string = "ECC Error";
break;
default:
type_string = "Unknown";
break;
};
printk("%s: IOMMU Error, type[%s]\n",
pbm->name, type_string);
/* Enter diagnostic mode and probe for error'd
* entries in the IOTLB.
*/
control &= ~(SABRE_IOMMUCTRL_ERRSTS | SABRE_IOMMUCTRL_ERR);
sabre_write(iommu->iommu_control,
(control | SABRE_IOMMUCTRL_DENAB));
for (i = 0; i < 16; i++) {
unsigned long base = pbm->controller_regs;
iommu_tag[i] =
sabre_read(base + SABRE_IOMMU_TAG + (i * 8UL));
iommu_data[i] =
sabre_read(base + SABRE_IOMMU_DATA + (i * 8UL));
sabre_write(base + SABRE_IOMMU_TAG + (i * 8UL), 0);
sabre_write(base + SABRE_IOMMU_DATA + (i * 8UL), 0);
}
sabre_write(iommu->iommu_control, control);
for (i = 0; i < 16; i++) {
unsigned long tag, data;
tag = iommu_tag[i];
if (!(tag & SABRE_IOMMUTAG_ERR))
continue;
data = iommu_data[i];
switch((tag & SABRE_IOMMUTAG_ERRSTS) >> 23UL) {
case 1:
type_string = "Invalid Error";
break;
case 3:
type_string = "ECC Error";
break;
default:
type_string = "Unknown";
break;
};
printk("%s: IOMMU TAG(%d)[RAW(%016lx)error(%s)wr(%d)sz(%dK)vpg(%08lx)]\n",
pbm->name, i, tag, type_string,
((tag & SABRE_IOMMUTAG_WRITE) ? 1 : 0),
((tag & SABRE_IOMMUTAG_SIZE) ? 64 : 8),
((tag & SABRE_IOMMUTAG_VPN) << IOMMU_PAGE_SHIFT));
printk("%s: IOMMU DATA(%d)[RAW(%016lx)valid(%d)used(%d)cache(%d)ppg(%016lx)\n",
pbm->name, i, data,
((data & SABRE_IOMMUDATA_VALID) ? 1 : 0),
((data & SABRE_IOMMUDATA_USED) ? 1 : 0),
((data & SABRE_IOMMUDATA_CACHE) ? 1 : 0),
((data & SABRE_IOMMUDATA_PPN) << IOMMU_PAGE_SHIFT));
}
}
spin_unlock_irqrestore(&iommu->lock, flags);
}
static irqreturn_t sabre_ue_intr(int irq, void *dev_id)
{
struct pci_pbm_info *pbm = dev_id;
unsigned long afsr_reg = pbm->controller_regs + SABRE_UE_AFSR;
unsigned long afar_reg = pbm->controller_regs + SABRE_UECE_AFAR;
unsigned long afsr, afar, error_bits;
int reported;
/* Latch uncorrectable error status. */
afar = sabre_read(afar_reg);
afsr = sabre_read(afsr_reg);
/* Clear the primary/secondary error status bits. */
error_bits = afsr &
(SABRE_UEAFSR_PDRD | SABRE_UEAFSR_PDWR |
SABRE_UEAFSR_SDRD | SABRE_UEAFSR_SDWR |
SABRE_UEAFSR_SDTE | SABRE_UEAFSR_PDTE);
if (!error_bits)
return IRQ_NONE;
sabre_write(afsr_reg, error_bits);
/* Log the error. */
printk("%s: Uncorrectable Error, primary error type[%s%s]\n",
pbm->name,
((error_bits & SABRE_UEAFSR_PDRD) ?
"DMA Read" :
((error_bits & SABRE_UEAFSR_PDWR) ?
"DMA Write" : "???")),
((error_bits & SABRE_UEAFSR_PDTE) ?
":Translation Error" : ""));
printk("%s: bytemask[%04lx] dword_offset[%lx] was_block(%d)\n",
pbm->name,
(afsr & SABRE_UEAFSR_BMSK) >> 32UL,
(afsr & SABRE_UEAFSR_OFF) >> 29UL,
((afsr & SABRE_UEAFSR_BLK) ? 1 : 0));
printk("%s: UE AFAR [%016lx]\n", pbm->name, afar);
printk("%s: UE Secondary errors [", pbm->name);
reported = 0;
if (afsr & SABRE_UEAFSR_SDRD) {
reported++;
printk("(DMA Read)");
}
if (afsr & SABRE_UEAFSR_SDWR) {
reported++;
printk("(DMA Write)");
}
if (afsr & SABRE_UEAFSR_SDTE) {
reported++;
printk("(Translation Error)");
}
if (!reported)
printk("(none)");
printk("]\n");
/* Interrogate IOMMU for error status. */
sabre_check_iommu_error(pbm, afsr, afar);
return IRQ_HANDLED;
}
static irqreturn_t sabre_ce_intr(int irq, void *dev_id)
{
struct pci_pbm_info *pbm = dev_id;
unsigned long afsr_reg = pbm->controller_regs + SABRE_CE_AFSR;
unsigned long afar_reg = pbm->controller_regs + SABRE_UECE_AFAR;
unsigned long afsr, afar, error_bits;
int reported;
/* Latch error status. */
afar = sabre_read(afar_reg);
afsr = sabre_read(afsr_reg);
/* Clear primary/secondary error status bits. */
error_bits = afsr &
(SABRE_CEAFSR_PDRD | SABRE_CEAFSR_PDWR |
SABRE_CEAFSR_SDRD | SABRE_CEAFSR_SDWR);
if (!error_bits)
return IRQ_NONE;
sabre_write(afsr_reg, error_bits);
/* Log the error. */
printk("%s: Correctable Error, primary error type[%s]\n",
pbm->name,
((error_bits & SABRE_CEAFSR_PDRD) ?
"DMA Read" :
((error_bits & SABRE_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] "
"was_block(%d)\n",
pbm->name,
(afsr & SABRE_CEAFSR_ESYND) >> 48UL,
(afsr & SABRE_CEAFSR_BMSK) >> 32UL,
(afsr & SABRE_CEAFSR_OFF) >> 29UL,
((afsr & SABRE_CEAFSR_BLK) ? 1 : 0));
printk("%s: CE AFAR [%016lx]\n", pbm->name, afar);
printk("%s: CE Secondary errors [", pbm->name);
reported = 0;
if (afsr & SABRE_CEAFSR_SDRD) {
reported++;
printk("(DMA Read)");
}
if (afsr & SABRE_CEAFSR_SDWR) {
reported++;
printk("(DMA Write)");
}
if (!reported)
printk("(none)");
printk("]\n");
return IRQ_HANDLED;
}
static irqreturn_t sabre_pcierr_intr_other(struct pci_pbm_info *pbm)
{
unsigned long csr_reg, csr, csr_error_bits;
irqreturn_t ret = IRQ_NONE;
u16 stat;
csr_reg = pbm->controller_regs + SABRE_PCICTRL;
csr = sabre_read(csr_reg);
csr_error_bits =
csr & SABRE_PCICTRL_SERR;
if (csr_error_bits) {
/* Clear the errors. */
sabre_write(csr_reg, csr);
/* Log 'em. */
if (csr_error_bits & SABRE_PCICTRL_SERR)
printk("%s: PCI SERR signal asserted.\n",
pbm->name);
ret = IRQ_HANDLED;
}
pci_bus_read_config_word(sabre_root_bus, 0,
PCI_STATUS, &stat);
if (stat & (PCI_STATUS_PARITY |
PCI_STATUS_SIG_TARGET_ABORT |
PCI_STATUS_REC_TARGET_ABORT |
PCI_STATUS_REC_MASTER_ABORT |
PCI_STATUS_SIG_SYSTEM_ERROR)) {
printk("%s: PCI bus error, PCI_STATUS[%04x]\n",
pbm->name, stat);
pci_bus_write_config_word(sabre_root_bus, 0,
PCI_STATUS, 0xffff);
ret = IRQ_HANDLED;
}
return ret;
}
static irqreturn_t sabre_pcierr_intr(int irq, void *dev_id)
{
struct pci_pbm_info *pbm = dev_id;
unsigned long afsr_reg, afar_reg;
unsigned long afsr, afar, error_bits;
int reported;
afsr_reg = pbm->controller_regs + SABRE_PIOAFSR;
afar_reg = pbm->controller_regs + SABRE_PIOAFAR;
/* Latch error status. */
afar = sabre_read(afar_reg);
afsr = sabre_read(afsr_reg);
/* Clear primary/secondary error status bits. */
error_bits = afsr &
(SABRE_PIOAFSR_PMA | SABRE_PIOAFSR_PTA |
SABRE_PIOAFSR_PRTRY | SABRE_PIOAFSR_PPERR |
SABRE_PIOAFSR_SMA | SABRE_PIOAFSR_STA |
SABRE_PIOAFSR_SRTRY | SABRE_PIOAFSR_SPERR);
if (!error_bits)
return sabre_pcierr_intr_other(pbm);
sabre_write(afsr_reg, error_bits);
/* Log the error. */
printk("%s: PCI Error, primary error type[%s]\n",
pbm->name,
(((error_bits & SABRE_PIOAFSR_PMA) ?
"Master Abort" :
((error_bits & SABRE_PIOAFSR_PTA) ?
"Target Abort" :
((error_bits & SABRE_PIOAFSR_PRTRY) ?
"Excessive Retries" :
((error_bits & SABRE_PIOAFSR_PPERR) ?
"Parity Error" : "???"))))));
printk("%s: bytemask[%04lx] was_block(%d)\n",
pbm->name,
(afsr & SABRE_PIOAFSR_BMSK) >> 32UL,
(afsr & SABRE_PIOAFSR_BLK) ? 1 : 0);
printk("%s: PCI AFAR [%016lx]\n", pbm->name, afar);
printk("%s: PCI Secondary errors [", pbm->name);
reported = 0;
if (afsr & SABRE_PIOAFSR_SMA) {
reported++;
printk("(Master Abort)");
}
if (afsr & SABRE_PIOAFSR_STA) {
reported++;
printk("(Target Abort)");
}
if (afsr & SABRE_PIOAFSR_SRTRY) {
reported++;
printk("(Excessive Retries)");
}
if (afsr & SABRE_PIOAFSR_SPERR) {
reported++;
printk("(Parity Error)");
}
if (!reported)
printk("(none)");
printk("]\n");
/* For the error types shown, scan both PCI buses for devices
* which have logged that error type.
*/
/* If we see a Target Abort, this could be the result of an
* IOMMU translation error of some sort. It is extremely
* useful to log this information as usually it indicates
* a bug in the IOMMU support code or a PCI device driver.
*/
if (error_bits & (SABRE_PIOAFSR_PTA | SABRE_PIOAFSR_STA)) {
sabre_check_iommu_error(pbm, afsr, afar);
pci_scan_for_target_abort(pbm, pbm->pci_bus);
}
if (error_bits & (SABRE_PIOAFSR_PMA | SABRE_PIOAFSR_SMA))
pci_scan_for_master_abort(pbm, pbm->pci_bus);
/* For excessive retries, SABRE/PBM will abort the device
* and there is no way to specifically check for excessive
* retries in the config space status registers. So what
* we hope is that we'll catch it via the master/target
* abort events.
*/
if (error_bits & (SABRE_PIOAFSR_PPERR | SABRE_PIOAFSR_SPERR))
pci_scan_for_parity_error(pbm, pbm->pci_bus);
return IRQ_HANDLED;
}
static void sabre_register_error_handlers(struct pci_pbm_info *pbm)
{
struct device_node *dp = pbm->prom_node;
struct of_device *op;
unsigned long base = pbm->controller_regs;
u64 tmp;
int err;
if (pbm->chip_type == PBM_CHIP_TYPE_SABRE)
dp = dp->parent;
op = of_find_device_by_node(dp);
if (!op)
return;
/* Sabre/Hummingbird IRQ property layout is:
* 0: PCI ERR
* 1: UE ERR
* 2: CE ERR
* 3: POWER FAIL
*/
if (op->num_irqs < 4)
return;
/* We clear the error bits in the appropriate AFSR before
* registering the handler so that we don't get spurious
* interrupts.
*/
sabre_write(base + SABRE_UE_AFSR,
(SABRE_UEAFSR_PDRD | SABRE_UEAFSR_PDWR |
SABRE_UEAFSR_SDRD | SABRE_UEAFSR_SDWR |
SABRE_UEAFSR_SDTE | SABRE_UEAFSR_PDTE));
err = request_irq(op->irqs[1], sabre_ue_intr, 0, "SABRE_UE", pbm);
if (err)
printk(KERN_WARNING "%s: Couldn't register UE, err=%d.\n",
pbm->name, err);
sabre_write(base + SABRE_CE_AFSR,
(SABRE_CEAFSR_PDRD | SABRE_CEAFSR_PDWR |
SABRE_CEAFSR_SDRD | SABRE_CEAFSR_SDWR));
err = request_irq(op->irqs[2], sabre_ce_intr, 0, "SABRE_CE", pbm);
if (err)
printk(KERN_WARNING "%s: Couldn't register CE, err=%d.\n",
pbm->name, err);
err = request_irq(op->irqs[0], sabre_pcierr_intr, 0,
"SABRE_PCIERR", pbm);
if (err)
printk(KERN_WARNING "%s: Couldn't register PCIERR, err=%d.\n",
pbm->name, err);
tmp = sabre_read(base + SABRE_PCICTRL);
tmp |= SABRE_PCICTRL_ERREN;
sabre_write(base + SABRE_PCICTRL, tmp);
}
static void apb_init(struct pci_bus *sabre_bus)
{
struct pci_dev *pdev;
list_for_each_entry(pdev, &sabre_bus->devices, bus_list) {
if (pdev->vendor == PCI_VENDOR_ID_SUN &&
pdev->device == PCI_DEVICE_ID_SUN_SIMBA) {
u16 word16;
pci_read_config_word(pdev, PCI_COMMAND, &word16);
word16 |= PCI_COMMAND_SERR | PCI_COMMAND_PARITY |
PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY |
PCI_COMMAND_IO;
pci_write_config_word(pdev, PCI_COMMAND, word16);
/* Status register bits are "write 1 to clear". */
pci_write_config_word(pdev, PCI_STATUS, 0xffff);
pci_write_config_word(pdev, PCI_SEC_STATUS, 0xffff);
/* Use a primary/seconday latency timer value
* of 64.
*/
pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 64);
pci_write_config_byte(pdev, PCI_SEC_LATENCY_TIMER, 64);
/* Enable reporting/forwarding of master aborts,
* parity, and SERR.
*/
pci_write_config_byte(pdev, PCI_BRIDGE_CONTROL,
(PCI_BRIDGE_CTL_PARITY |
PCI_BRIDGE_CTL_SERR |
PCI_BRIDGE_CTL_MASTER_ABORT));
}
}
}
static void sabre_scan_bus(struct pci_pbm_info *pbm)
{
static int once;
/* The APB bridge speaks to the Sabre host PCI bridge
* at 66Mhz, but the front side of APB runs at 33Mhz
* for both segments.
*
* Hummingbird systems do not use APB, so they run
* at 66MHZ.
*/
if (hummingbird_p)
pbm->is_66mhz_capable = 1;
else
pbm->is_66mhz_capable = 0;
/* This driver has not been verified to handle
* multiple SABREs yet, so trap this.
*
* Also note that the SABRE host bridge is hardwired
* to live at bus 0.
*/
if (once != 0) {
prom_printf("SABRE: Multiple controllers unsupported.\n");
prom_halt();
}
once++;
pbm->pci_bus = pci_scan_one_pbm(pbm);
if (!pbm->pci_bus)
return;
sabre_root_bus = pbm->pci_bus;
apb_init(pbm->pci_bus);
sabre_register_error_handlers(pbm);
}
static int sabre_iommu_init(struct pci_pbm_info *pbm,
int tsbsize, unsigned long dvma_offset,
u32 dma_mask)
{
struct iommu *iommu = pbm->iommu;
unsigned long i;
u64 control;
int err;
/* Register addresses. */
iommu->iommu_control = pbm->controller_regs + SABRE_IOMMU_CONTROL;
iommu->iommu_tsbbase = pbm->controller_regs + SABRE_IOMMU_TSBBASE;
iommu->iommu_flush = pbm->controller_regs + SABRE_IOMMU_FLUSH;
iommu->iommu_tags = iommu->iommu_flush + (0xa580UL - 0x0210UL);
iommu->write_complete_reg = pbm->controller_regs + SABRE_WRSYNC;
/* Sabre's IOMMU lacks ctx flushing. */
iommu->iommu_ctxflush = 0;
/* Invalidate TLB Entries. */
control = sabre_read(pbm->controller_regs + SABRE_IOMMU_CONTROL);
control |= SABRE_IOMMUCTRL_DENAB;
sabre_write(pbm->controller_regs + SABRE_IOMMU_CONTROL, control);
for(i = 0; i < 16; i++) {
sabre_write(pbm->controller_regs + SABRE_IOMMU_TAG + (i * 8UL), 0);
sabre_write(pbm->controller_regs + SABRE_IOMMU_DATA + (i * 8UL), 0);
}
/* Leave diag mode enabled for full-flushing done
* in pci_iommu.c
*/
err = iommu_table_init(iommu, tsbsize * 1024 * 8,
dvma_offset, dma_mask);
if (err)
return err;
sabre_write(pbm->controller_regs + SABRE_IOMMU_TSBBASE,
__pa(iommu->page_table));
control = sabre_read(pbm->controller_regs + SABRE_IOMMU_CONTROL);
control &= ~(SABRE_IOMMUCTRL_TSBSZ | SABRE_IOMMUCTRL_TBWSZ);
control |= SABRE_IOMMUCTRL_ENAB;
switch(tsbsize) {
case 64:
control |= SABRE_IOMMU_TSBSZ_64K;
break;
case 128:
control |= SABRE_IOMMU_TSBSZ_128K;
break;
default:
prom_printf("iommu_init: Illegal TSB size %d\n", tsbsize);
prom_halt();
break;
}
sabre_write(pbm->controller_regs + SABRE_IOMMU_CONTROL, control);
return 0;
}
static void sabre_pbm_init(struct pci_controller_info *p, struct pci_pbm_info *pbm, struct device_node *dp)
{
pbm->name = dp->full_name;
printk("%s: SABRE PCI Bus Module\n", pbm->name);
pbm->scan_bus = sabre_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_SABRE;
pbm->parent = p;
pbm->prom_node = dp;
pci_get_pbm_props(pbm);
pci_determine_mem_io_space(pbm);
}
void sabre_init(struct device_node *dp, char *model_name)
{
const struct linux_prom64_registers *pr_regs;
struct pci_controller_info *p;
struct pci_pbm_info *pbm;
struct iommu *iommu;
int tsbsize;
const u32 *vdma;
u32 upa_portid, dma_mask;
u64 clear_irq;
hummingbird_p = 0;
if (!strcmp(model_name, "pci108e,a001"))
hummingbird_p = 1;
else if (!strcmp(model_name, "SUNW,sabre")) {
const char *compat = of_get_property(dp, "compatible", NULL);
if (compat && !strcmp(compat, "pci108e,a001"))
hummingbird_p = 1;
if (!hummingbird_p) {
struct device_node *dp;
/* Of course, Sun has to encode things a thousand
* different ways, inconsistently.
*/
for_each_node_by_type(dp, "cpu") {
if (!strcmp(dp->name, "SUNW,UltraSPARC-IIe"))
hummingbird_p = 1;
}
}
}
p = kzalloc(sizeof(*p), GFP_ATOMIC);
if (!p)
goto fatal_memory_error;
iommu = kzalloc(sizeof(*iommu), GFP_ATOMIC);
if (!iommu)
goto fatal_memory_error;
pbm = &p->pbm_A;
pbm->iommu = iommu;
upa_portid = of_getintprop_default(dp, "upa-portid", 0xff);
pbm->next = pci_pbm_root;
pci_pbm_root = pbm;
pbm->portid = upa_portid;
/*
* Map in SABRE register set and report the presence of this SABRE.
*/
pr_regs = of_get_property(dp, "reg", NULL);
/*
* First REG in property is base of entire SABRE register space.
*/
pbm->controller_regs = pr_regs[0].phys_addr;
/* Clear interrupts */
/* PCI first */
for (clear_irq = SABRE_ICLR_A_SLOT0; clear_irq < SABRE_ICLR_B_SLOT0 + 0x80; clear_irq += 8)
sabre_write(pbm->controller_regs + clear_irq, 0x0UL);
/* Then OBIO */
for (clear_irq = SABRE_ICLR_SCSI; clear_irq < SABRE_ICLR_SCSI + 0x80; clear_irq += 8)
sabre_write(pbm->controller_regs + clear_irq, 0x0UL);
/* Error interrupts are enabled later after the bus scan. */
sabre_write(pbm->controller_regs + SABRE_PCICTRL,
(SABRE_PCICTRL_MRLEN | SABRE_PCICTRL_SERR |
SABRE_PCICTRL_ARBPARK | SABRE_PCICTRL_AEN));
/* Now map in PCI config space for entire SABRE. */
pbm->config_space =
(pbm->controller_regs + SABRE_CONFIGSPACE);
vdma = of_get_property(dp, "virtual-dma", NULL);
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("SABRE: strange virtual-dma size.\n");
prom_halt();
}
if (sabre_iommu_init(pbm, tsbsize, vdma[0], dma_mask))
goto fatal_memory_error;
/*
* Look for APB underneath.
*/
sabre_pbm_init(p, pbm, dp);
return;
fatal_memory_error:
prom_printf("SABRE: Fatal memory allocation error.\n");
prom_halt();
}
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