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android_kernel_xiaomi_sm8350/arch/sparc/kernel/sbus.c
Sam Ravnborg a88b5ba8bd sparc,sparc64: unify kernel/ 
o Move all files from sparc64/kernel/ to sparc/kernel
  - rename as appropriate
o Update sparc/Makefile to the changes
o Update sparc/kernel/Makefile to include the sparc64 files

NOTE: This commit changes link order on sparc64!

Link order had to change for either of sparc32 and sparc64.
And assuming sparc64 see more testing than sparc32 change link
order on sparc64 where issues will be caught faster.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-12-04 09:17:21 -08:00

675 lines
20 KiB
C
Raw Blame History

/*
* sbus.c: UltraSparc SBUS controller support.
*
* Copyright (C) 1999 David S. Miller (davem@redhat.com)
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/spinlock.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <asm/page.h>
#include <asm/io.h>
#include <asm/upa.h>
#include <asm/cache.h>
#include <asm/dma.h>
#include <asm/irq.h>
#include <asm/prom.h>
#include <asm/oplib.h>
#include <asm/starfire.h>
#include "iommu_common.h"
#define MAP_BASE ((u32)0xc0000000)
/* Offsets from iommu_regs */
#define SYSIO_IOMMUREG_BASE 0x2400UL
#define IOMMU_CONTROL (0x2400UL - 0x2400UL) /* IOMMU control register */
#define IOMMU_TSBBASE (0x2408UL - 0x2400UL) /* TSB base address register */
#define IOMMU_FLUSH (0x2410UL - 0x2400UL) /* IOMMU flush register */
#define IOMMU_VADIAG (0x4400UL - 0x2400UL) /* SBUS virtual address diagnostic */
#define IOMMU_TAGCMP (0x4408UL - 0x2400UL) /* TLB tag compare diagnostics */
#define IOMMU_LRUDIAG (0x4500UL - 0x2400UL) /* IOMMU LRU queue diagnostics */
#define IOMMU_TAGDIAG (0x4580UL - 0x2400UL) /* TLB tag diagnostics */
#define IOMMU_DRAMDIAG (0x4600UL - 0x2400UL) /* TLB data RAM diagnostics */
#define IOMMU_DRAM_VALID (1UL << 30UL)
/* Offsets from strbuf_regs */
#define SYSIO_STRBUFREG_BASE 0x2800UL
#define STRBUF_CONTROL (0x2800UL - 0x2800UL) /* Control */
#define STRBUF_PFLUSH (0x2808UL - 0x2800UL) /* Page flush/invalidate */
#define STRBUF_FSYNC (0x2810UL - 0x2800UL) /* Flush synchronization */
#define STRBUF_DRAMDIAG (0x5000UL - 0x2800UL) /* data RAM diagnostic */
#define STRBUF_ERRDIAG (0x5400UL - 0x2800UL) /* error status diagnostics */
#define STRBUF_PTAGDIAG (0x5800UL - 0x2800UL) /* Page tag diagnostics */
#define STRBUF_LTAGDIAG (0x5900UL - 0x2800UL) /* Line tag diagnostics */
#define STRBUF_TAG_VALID 0x02UL
/* Enable 64-bit DVMA mode for the given device. */
void sbus_set_sbus64(struct device *dev, int bursts)
{
struct iommu *iommu = dev->archdata.iommu;
struct of_device *op = to_of_device(dev);
const struct linux_prom_registers *regs;
unsigned long cfg_reg;
int slot;
u64 val;
regs = of_get_property(op->node, "reg", NULL);
if (!regs) {
printk(KERN_ERR "sbus_set_sbus64: Cannot find regs for %s\n",
op->node->full_name);
return;
}
slot = regs->which_io;
cfg_reg = iommu->write_complete_reg;
switch (slot) {
case 0:
cfg_reg += 0x20UL;
break;
case 1:
cfg_reg += 0x28UL;
break;
case 2:
cfg_reg += 0x30UL;
break;
case 3:
cfg_reg += 0x38UL;
break;
case 13:
cfg_reg += 0x40UL;
break;
case 14:
cfg_reg += 0x48UL;
break;
case 15:
cfg_reg += 0x50UL;
break;
default:
return;
};
val = upa_readq(cfg_reg);
if (val & (1UL << 14UL)) {
/* Extended transfer mode already enabled. */
return;
}
val |= (1UL << 14UL);
if (bursts & DMA_BURST8)
val |= (1UL << 1UL);
if (bursts & DMA_BURST16)
val |= (1UL << 2UL);
if (bursts & DMA_BURST32)
val |= (1UL << 3UL);
if (bursts & DMA_BURST64)
val |= (1UL << 4UL);
upa_writeq(val, cfg_reg);
}
/* INO number to IMAP register offset for SYSIO external IRQ's.
* This should conform to both Sunfire/Wildfire server and Fusion
* desktop designs.
*/
#define SYSIO_IMAP_SLOT0 0x2c00UL
#define SYSIO_IMAP_SLOT1 0x2c08UL
#define SYSIO_IMAP_SLOT2 0x2c10UL
#define SYSIO_IMAP_SLOT3 0x2c18UL
#define SYSIO_IMAP_SCSI 0x3000UL
#define SYSIO_IMAP_ETH 0x3008UL
#define SYSIO_IMAP_BPP 0x3010UL
#define SYSIO_IMAP_AUDIO 0x3018UL
#define SYSIO_IMAP_PFAIL 0x3020UL
#define SYSIO_IMAP_KMS 0x3028UL
#define SYSIO_IMAP_FLPY 0x3030UL
#define SYSIO_IMAP_SHW 0x3038UL
#define SYSIO_IMAP_KBD 0x3040UL
#define SYSIO_IMAP_MS 0x3048UL
#define SYSIO_IMAP_SER 0x3050UL
#define SYSIO_IMAP_TIM0 0x3060UL
#define SYSIO_IMAP_TIM1 0x3068UL
#define SYSIO_IMAP_UE 0x3070UL
#define SYSIO_IMAP_CE 0x3078UL
#define SYSIO_IMAP_SBERR 0x3080UL
#define SYSIO_IMAP_PMGMT 0x3088UL
#define SYSIO_IMAP_GFX 0x3090UL
#define SYSIO_IMAP_EUPA 0x3098UL
#define bogon ((unsigned long) -1)
static unsigned long sysio_irq_offsets[] = {
/* SBUS Slot 0 --> 3, level 1 --> 7 */
SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0,
SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0,
SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1,
SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1,
SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2,
SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2,
SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3,
SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3,
/* Onboard devices (not relevant/used on SunFire). */
SYSIO_IMAP_SCSI,
SYSIO_IMAP_ETH,
SYSIO_IMAP_BPP,
bogon,
SYSIO_IMAP_AUDIO,
SYSIO_IMAP_PFAIL,
bogon,
bogon,
SYSIO_IMAP_KMS,
SYSIO_IMAP_FLPY,
SYSIO_IMAP_SHW,
SYSIO_IMAP_KBD,
SYSIO_IMAP_MS,
SYSIO_IMAP_SER,
bogon,
bogon,
SYSIO_IMAP_TIM0,
SYSIO_IMAP_TIM1,
bogon,
bogon,
SYSIO_IMAP_UE,
SYSIO_IMAP_CE,
SYSIO_IMAP_SBERR,
SYSIO_IMAP_PMGMT,
};
#undef bogon
#define NUM_SYSIO_OFFSETS ARRAY_SIZE(sysio_irq_offsets)
/* Convert Interrupt Mapping register pointer to associated
* Interrupt Clear register pointer, SYSIO specific version.
*/
#define SYSIO_ICLR_UNUSED0 0x3400UL
#define SYSIO_ICLR_SLOT0 0x3408UL
#define SYSIO_ICLR_SLOT1 0x3448UL
#define SYSIO_ICLR_SLOT2 0x3488UL
#define SYSIO_ICLR_SLOT3 0x34c8UL
static unsigned long sysio_imap_to_iclr(unsigned long imap)
{
unsigned long diff = SYSIO_ICLR_UNUSED0 - SYSIO_IMAP_SLOT0;
return imap + diff;
}
static unsigned int sbus_build_irq(struct of_device *op, unsigned int ino)
{
struct iommu *iommu = op->dev.archdata.iommu;
unsigned long reg_base = iommu->write_complete_reg - 0x2000UL;
unsigned long imap, iclr;
int sbus_level = 0;
imap = sysio_irq_offsets[ino];
if (imap == ((unsigned long)-1)) {
prom_printf("get_irq_translations: Bad SYSIO INO[%x]\n",
ino);
prom_halt();
}
imap += reg_base;
/* SYSIO inconsistency. For external SLOTS, we have to select
* the right ICLR register based upon the lower SBUS irq level
* bits.
*/
if (ino >= 0x20) {
iclr = sysio_imap_to_iclr(imap);
} else {
int sbus_slot = (ino & 0x18)>>3;
sbus_level = ino & 0x7;
switch(sbus_slot) {
case 0:
iclr = reg_base + SYSIO_ICLR_SLOT0;
break;
case 1:
iclr = reg_base + SYSIO_ICLR_SLOT1;
break;
case 2:
iclr = reg_base + SYSIO_ICLR_SLOT2;
break;
default:
case 3:
iclr = reg_base + SYSIO_ICLR_SLOT3;
break;
};
iclr += ((unsigned long)sbus_level - 1UL) * 8UL;
}
return build_irq(sbus_level, iclr, imap);
}
/* Error interrupt handling. */
#define SYSIO_UE_AFSR 0x0030UL
#define SYSIO_UE_AFAR 0x0038UL
#define SYSIO_UEAFSR_PPIO 0x8000000000000000UL /* Primary PIO cause */
#define SYSIO_UEAFSR_PDRD 0x4000000000000000UL /* Primary DVMA read cause */
#define SYSIO_UEAFSR_PDWR 0x2000000000000000UL /* Primary DVMA write cause */
#define SYSIO_UEAFSR_SPIO 0x1000000000000000UL /* Secondary PIO is cause */
#define SYSIO_UEAFSR_SDRD 0x0800000000000000UL /* Secondary DVMA read cause */
#define SYSIO_UEAFSR_SDWR 0x0400000000000000UL /* Secondary DVMA write cause*/
#define SYSIO_UEAFSR_RESV1 0x03ff000000000000UL /* Reserved */
#define SYSIO_UEAFSR_DOFF 0x0000e00000000000UL /* Doubleword Offset */
#define SYSIO_UEAFSR_SIZE 0x00001c0000000000UL /* Bad transfer size 2^SIZE */
#define SYSIO_UEAFSR_MID 0x000003e000000000UL /* UPA MID causing the fault */
#define SYSIO_UEAFSR_RESV2 0x0000001fffffffffUL /* Reserved */
static irqreturn_t sysio_ue_handler(int irq, void *dev_id)
{
struct of_device *op = dev_id;
struct iommu *iommu = op->dev.archdata.iommu;
unsigned long reg_base = iommu->write_complete_reg - 0x2000UL;
unsigned long afsr_reg, afar_reg;
unsigned long afsr, afar, error_bits;
int reported, portid;
afsr_reg = reg_base + SYSIO_UE_AFSR;
afar_reg = reg_base + SYSIO_UE_AFAR;
/* Latch error status. */
afsr = upa_readq(afsr_reg);
afar = upa_readq(afar_reg);
/* Clear primary/secondary error status bits. */
error_bits = afsr &
(SYSIO_UEAFSR_PPIO | SYSIO_UEAFSR_PDRD | SYSIO_UEAFSR_PDWR |
SYSIO_UEAFSR_SPIO | SYSIO_UEAFSR_SDRD | SYSIO_UEAFSR_SDWR);
upa_writeq(error_bits, afsr_reg);
portid = of_getintprop_default(op->node, "portid", -1);
/* Log the error. */
printk("SYSIO[%x]: Uncorrectable ECC Error, primary error type[%s]\n",
portid,
(((error_bits & SYSIO_UEAFSR_PPIO) ?
"PIO" :
((error_bits & SYSIO_UEAFSR_PDRD) ?
"DVMA Read" :
((error_bits & SYSIO_UEAFSR_PDWR) ?
"DVMA Write" : "???")))));
printk("SYSIO[%x]: DOFF[%lx] SIZE[%lx] MID[%lx]\n",
portid,
(afsr & SYSIO_UEAFSR_DOFF) >> 45UL,
(afsr & SYSIO_UEAFSR_SIZE) >> 42UL,
(afsr & SYSIO_UEAFSR_MID) >> 37UL);
printk("SYSIO[%x]: AFAR[%016lx]\n", portid, afar);
printk("SYSIO[%x]: Secondary UE errors [", portid);
reported = 0;
if (afsr & SYSIO_UEAFSR_SPIO) {
reported++;
printk("(PIO)");
}
if (afsr & SYSIO_UEAFSR_SDRD) {
reported++;
printk("(DVMA Read)");
}
if (afsr & SYSIO_UEAFSR_SDWR) {
reported++;
printk("(DVMA Write)");
}
if (!reported)
printk("(none)");
printk("]\n");
return IRQ_HANDLED;
}
#define SYSIO_CE_AFSR 0x0040UL
#define SYSIO_CE_AFAR 0x0048UL
#define SYSIO_CEAFSR_PPIO 0x8000000000000000UL /* Primary PIO cause */
#define SYSIO_CEAFSR_PDRD 0x4000000000000000UL /* Primary DVMA read cause */
#define SYSIO_CEAFSR_PDWR 0x2000000000000000UL /* Primary DVMA write cause */
#define SYSIO_CEAFSR_SPIO 0x1000000000000000UL /* Secondary PIO cause */
#define SYSIO_CEAFSR_SDRD 0x0800000000000000UL /* Secondary DVMA read cause */
#define SYSIO_CEAFSR_SDWR 0x0400000000000000UL /* Secondary DVMA write cause*/
#define SYSIO_CEAFSR_RESV1 0x0300000000000000UL /* Reserved */
#define SYSIO_CEAFSR_ESYND 0x00ff000000000000UL /* Syndrome Bits */
#define SYSIO_CEAFSR_DOFF 0x0000e00000000000UL /* Double Offset */
#define SYSIO_CEAFSR_SIZE 0x00001c0000000000UL /* Bad transfer size 2^SIZE */
#define SYSIO_CEAFSR_MID 0x000003e000000000UL /* UPA MID causing the fault */
#define SYSIO_CEAFSR_RESV2 0x0000001fffffffffUL /* Reserved */
static irqreturn_t sysio_ce_handler(int irq, void *dev_id)
{
struct of_device *op = dev_id;
struct iommu *iommu = op->dev.archdata.iommu;
unsigned long reg_base = iommu->write_complete_reg - 0x2000UL;
unsigned long afsr_reg, afar_reg;
unsigned long afsr, afar, error_bits;
int reported, portid;
afsr_reg = reg_base + SYSIO_CE_AFSR;
afar_reg = reg_base + SYSIO_CE_AFAR;
/* Latch error status. */
afsr = upa_readq(afsr_reg);
afar = upa_readq(afar_reg);
/* Clear primary/secondary error status bits. */
error_bits = afsr &
(SYSIO_CEAFSR_PPIO | SYSIO_CEAFSR_PDRD | SYSIO_CEAFSR_PDWR |
SYSIO_CEAFSR_SPIO | SYSIO_CEAFSR_SDRD | SYSIO_CEAFSR_SDWR);
upa_writeq(error_bits, afsr_reg);
portid = of_getintprop_default(op->node, "portid", -1);
printk("SYSIO[%x]: Correctable ECC Error, primary error type[%s]\n",
portid,
(((error_bits & SYSIO_CEAFSR_PPIO) ?
"PIO" :
((error_bits & SYSIO_CEAFSR_PDRD) ?
"DVMA Read" :
((error_bits & SYSIO_CEAFSR_PDWR) ?
"DVMA Write" : "???")))));
/* XXX Use syndrome and afar to print out module string just like
* XXX UDB CE trap handler does... -DaveM
*/
printk("SYSIO[%x]: DOFF[%lx] ECC Syndrome[%lx] Size[%lx] MID[%lx]\n",
portid,
(afsr & SYSIO_CEAFSR_DOFF) >> 45UL,
(afsr & SYSIO_CEAFSR_ESYND) >> 48UL,
(afsr & SYSIO_CEAFSR_SIZE) >> 42UL,
(afsr & SYSIO_CEAFSR_MID) >> 37UL);
printk("SYSIO[%x]: AFAR[%016lx]\n", portid, afar);
printk("SYSIO[%x]: Secondary CE errors [", portid);
reported = 0;
if (afsr & SYSIO_CEAFSR_SPIO) {
reported++;
printk("(PIO)");
}
if (afsr & SYSIO_CEAFSR_SDRD) {
reported++;
printk("(DVMA Read)");
}
if (afsr & SYSIO_CEAFSR_SDWR) {
reported++;
printk("(DVMA Write)");
}
if (!reported)
printk("(none)");
printk("]\n");
return IRQ_HANDLED;
}
#define SYSIO_SBUS_AFSR 0x2010UL
#define SYSIO_SBUS_AFAR 0x2018UL
#define SYSIO_SBAFSR_PLE 0x8000000000000000UL /* Primary Late PIO Error */
#define SYSIO_SBAFSR_PTO 0x4000000000000000UL /* Primary SBUS Timeout */
#define SYSIO_SBAFSR_PBERR 0x2000000000000000UL /* Primary SBUS Error ACK */
#define SYSIO_SBAFSR_SLE 0x1000000000000000UL /* Secondary Late PIO Error */
#define SYSIO_SBAFSR_STO 0x0800000000000000UL /* Secondary SBUS Timeout */
#define SYSIO_SBAFSR_SBERR 0x0400000000000000UL /* Secondary SBUS Error ACK */
#define SYSIO_SBAFSR_RESV1 0x03ff000000000000UL /* Reserved */
#define SYSIO_SBAFSR_RD 0x0000800000000000UL /* Primary was late PIO read */
#define SYSIO_SBAFSR_RESV2 0x0000600000000000UL /* Reserved */
#define SYSIO_SBAFSR_SIZE 0x00001c0000000000UL /* Size of transfer */
#define SYSIO_SBAFSR_MID 0x000003e000000000UL /* MID causing the error */
#define SYSIO_SBAFSR_RESV3 0x0000001fffffffffUL /* Reserved */
static irqreturn_t sysio_sbus_error_handler(int irq, void *dev_id)
{
struct of_device *op = dev_id;
struct iommu *iommu = op->dev.archdata.iommu;
unsigned long afsr_reg, afar_reg, reg_base;
unsigned long afsr, afar, error_bits;
int reported, portid;
reg_base = iommu->write_complete_reg - 0x2000UL;
afsr_reg = reg_base + SYSIO_SBUS_AFSR;
afar_reg = reg_base + SYSIO_SBUS_AFAR;
afsr = upa_readq(afsr_reg);
afar = upa_readq(afar_reg);
/* Clear primary/secondary error status bits. */
error_bits = afsr &
(SYSIO_SBAFSR_PLE | SYSIO_SBAFSR_PTO | SYSIO_SBAFSR_PBERR |
SYSIO_SBAFSR_SLE | SYSIO_SBAFSR_STO | SYSIO_SBAFSR_SBERR);
upa_writeq(error_bits, afsr_reg);
portid = of_getintprop_default(op->node, "portid", -1);
/* Log the error. */
printk("SYSIO[%x]: SBUS Error, primary error type[%s] read(%d)\n",
portid,
(((error_bits & SYSIO_SBAFSR_PLE) ?
"Late PIO Error" :
((error_bits & SYSIO_SBAFSR_PTO) ?
"Time Out" :
((error_bits & SYSIO_SBAFSR_PBERR) ?
"Error Ack" : "???")))),
(afsr & SYSIO_SBAFSR_RD) ? 1 : 0);
printk("SYSIO[%x]: size[%lx] MID[%lx]\n",
portid,
(afsr & SYSIO_SBAFSR_SIZE) >> 42UL,
(afsr & SYSIO_SBAFSR_MID) >> 37UL);
printk("SYSIO[%x]: AFAR[%016lx]\n", portid, afar);
printk("SYSIO[%x]: Secondary SBUS errors [", portid);
reported = 0;
if (afsr & SYSIO_SBAFSR_SLE) {
reported++;
printk("(Late PIO Error)");
}
if (afsr & SYSIO_SBAFSR_STO) {
reported++;
printk("(Time Out)");
}
if (afsr & SYSIO_SBAFSR_SBERR) {
reported++;
printk("(Error Ack)");
}
if (!reported)
printk("(none)");
printk("]\n");
/* XXX check iommu/strbuf for further error status XXX */
return IRQ_HANDLED;
}
#define ECC_CONTROL 0x0020UL
#define SYSIO_ECNTRL_ECCEN 0x8000000000000000UL /* Enable ECC Checking */
#define SYSIO_ECNTRL_UEEN 0x4000000000000000UL /* Enable UE Interrupts */
#define SYSIO_ECNTRL_CEEN 0x2000000000000000UL /* Enable CE Interrupts */
#define SYSIO_UE_INO 0x34
#define SYSIO_CE_INO 0x35
#define SYSIO_SBUSERR_INO 0x36
static void __init sysio_register_error_handlers(struct of_device *op)
{
struct iommu *iommu = op->dev.archdata.iommu;
unsigned long reg_base = iommu->write_complete_reg - 0x2000UL;
unsigned int irq;
u64 control;
int portid;
portid = of_getintprop_default(op->node, "portid", -1);
irq = sbus_build_irq(op, SYSIO_UE_INO);
if (request_irq(irq, sysio_ue_handler, 0,
"SYSIO_UE", op) < 0) {
prom_printf("SYSIO[%x]: Cannot register UE interrupt.\n",
portid);
prom_halt();
}
irq = sbus_build_irq(op, SYSIO_CE_INO);
if (request_irq(irq, sysio_ce_handler, 0,
"SYSIO_CE", op) < 0) {
prom_printf("SYSIO[%x]: Cannot register CE interrupt.\n",
portid);
prom_halt();
}
irq = sbus_build_irq(op, SYSIO_SBUSERR_INO);
if (request_irq(irq, sysio_sbus_error_handler, 0,
"SYSIO_SBERR", op) < 0) {
prom_printf("SYSIO[%x]: Cannot register SBUS Error interrupt.\n",
portid);
prom_halt();
}
/* Now turn the error interrupts on and also enable ECC checking. */
upa_writeq((SYSIO_ECNTRL_ECCEN |
SYSIO_ECNTRL_UEEN |
SYSIO_ECNTRL_CEEN),
reg_base + ECC_CONTROL);
control = upa_readq(iommu->write_complete_reg);
control |= 0x100UL; /* SBUS Error Interrupt Enable */
upa_writeq(control, iommu->write_complete_reg);
}
/* Boot time initialization. */
static void __init sbus_iommu_init(struct of_device *op)
{
const struct linux_prom64_registers *pr;
struct device_node *dp = op->node;
struct iommu *iommu;
struct strbuf *strbuf;
unsigned long regs, reg_base;
int i, portid;
u64 control;
pr = of_get_property(dp, "reg", NULL);
if (!pr) {
prom_printf("sbus_iommu_init: Cannot map SYSIO "
"control registers.\n");
prom_halt();
}
regs = pr->phys_addr;
iommu = kzalloc(sizeof(*iommu), GFP_ATOMIC);
if (!iommu)
goto fatal_memory_error;
strbuf = kzalloc(sizeof(*strbuf), GFP_ATOMIC);
if (!strbuf)
goto fatal_memory_error;
op->dev.archdata.iommu = iommu;
op->dev.archdata.stc = strbuf;
op->dev.archdata.numa_node = -1;
reg_base = regs + SYSIO_IOMMUREG_BASE;
iommu->iommu_control = reg_base + IOMMU_CONTROL;
iommu->iommu_tsbbase = reg_base + IOMMU_TSBBASE;
iommu->iommu_flush = reg_base + IOMMU_FLUSH;
iommu->iommu_tags = iommu->iommu_control +
(IOMMU_TAGDIAG - IOMMU_CONTROL);
reg_base = regs + SYSIO_STRBUFREG_BASE;
strbuf->strbuf_control = reg_base + STRBUF_CONTROL;
strbuf->strbuf_pflush = reg_base + STRBUF_PFLUSH;
strbuf->strbuf_fsync = reg_base + STRBUF_FSYNC;
strbuf->strbuf_enabled = 1;
strbuf->strbuf_flushflag = (volatile unsigned long *)
((((unsigned long)&strbuf->__flushflag_buf[0])
+ 63UL)
& ~63UL);
strbuf->strbuf_flushflag_pa = (unsigned long)
__pa(strbuf->strbuf_flushflag);
/* The SYSIO SBUS control register is used for dummy reads
* in order to ensure write completion.
*/
iommu->write_complete_reg = regs + 0x2000UL;
portid = of_getintprop_default(op->node, "portid", -1);
printk(KERN_INFO "SYSIO: UPA portID %x, at %016lx\n",
portid, regs);
/* Setup for TSB_SIZE=7, TBW_SIZE=0, MMU_DE=1, MMU_EN=1 */
if (iommu_table_init(iommu, IO_TSB_SIZE, MAP_BASE, 0xffffffff, -1))
goto fatal_memory_error;
control = upa_readq(iommu->iommu_control);
control = ((7UL << 16UL) |
(0UL << 2UL) |
(1UL << 1UL) |
(1UL << 0UL));
upa_writeq(control, iommu->iommu_control);
/* Clean out any cruft in the IOMMU using
* diagnostic accesses.
*/
for (i = 0; i < 16; i++) {
unsigned long dram, tag;
dram = iommu->iommu_control + (IOMMU_DRAMDIAG - IOMMU_CONTROL);
tag = iommu->iommu_control + (IOMMU_TAGDIAG - IOMMU_CONTROL);
dram += (unsigned long)i * 8UL;
tag += (unsigned long)i * 8UL;
upa_writeq(0, dram);
upa_writeq(0, tag);
}
upa_readq(iommu->write_complete_reg);
/* Give the TSB to SYSIO. */
upa_writeq(__pa(iommu->page_table), iommu->iommu_tsbbase);
/* Setup streaming buffer, DE=1 SB_EN=1 */
control = (1UL << 1UL) | (1UL << 0UL);
upa_writeq(control, strbuf->strbuf_control);
/* Clear out the tags using diagnostics. */
for (i = 0; i < 16; i++) {
unsigned long ptag, ltag;
ptag = strbuf->strbuf_control +
(STRBUF_PTAGDIAG - STRBUF_CONTROL);
ltag = strbuf->strbuf_control +
(STRBUF_LTAGDIAG - STRBUF_CONTROL);
ptag += (unsigned long)i * 8UL;
ltag += (unsigned long)i * 8UL;
upa_writeq(0UL, ptag);
upa_writeq(0UL, ltag);
}
/* Enable DVMA arbitration for all devices/slots. */
control = upa_readq(iommu->write_complete_reg);
control |= 0x3fUL;
upa_writeq(control, iommu->write_complete_reg);
/* Now some Xfire specific grot... */
if (this_is_starfire)
starfire_hookup(portid);
sysio_register_error_handlers(op);
return;
fatal_memory_error:
prom_printf("sbus_iommu_init: Fatal memory allocation error.\n");
}
static int __init sbus_init(void)
{
struct device_node *dp;
for_each_node_by_name(dp, "sbus") {
struct of_device *op = of_find_device_by_node(dp);
sbus_iommu_init(op);
of_propagate_archdata(op);
}
return 0;
}
subsys_initcall(sbus_init);
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