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-rw-r--r--arch/sparc/kernel/sbus.c678
1 files changed, 678 insertions, 0 deletions
diff --git a/arch/sparc/kernel/sbus.c b/arch/sparc/kernel/sbus.c
new file mode 100644
index 000000000..32141e100
--- /dev/null
+++ b/arch/sparc/kernel/sbus.c
@@ -0,0 +1,678 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * 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/export.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/numa.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 platform_device *op = to_platform_device(dev);
+ const struct linux_prom_registers *regs;
+ unsigned long cfg_reg;
+ int slot;
+ u64 val;
+
+ regs = of_get_property(op->dev.of_node, "reg", NULL);
+ if (!regs) {
+ printk(KERN_ERR "sbus_set_sbus64: Cannot find regs for %pOF\n",
+ op->dev.of_node);
+ 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);
+}
+EXPORT_SYMBOL(sbus_set_sbus64);
+
+/* 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 platform_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 platform_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->dev.of_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 platform_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->dev.of_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 platform_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->dev.of_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 platform_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->dev.of_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 platform_device *op)
+{
+ const struct linux_prom64_registers *pr;
+ struct device_node *dp = op->dev.of_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);
+ strbuf = kzalloc(sizeof(*strbuf), GFP_ATOMIC);
+ if (!iommu || !strbuf)
+ goto fatal_memory_error;
+
+ op->dev.archdata.iommu = iommu;
+ op->dev.archdata.stc = strbuf;
+ op->dev.archdata.numa_node = NUMA_NO_NODE;
+
+ 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->dev.of_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:
+ kfree(iommu);
+ kfree(strbuf);
+ 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 platform_device *op = of_find_device_by_node(dp);
+
+ sbus_iommu_init(op);
+ of_propagate_archdata(op);
+ }
+
+ return 0;
+}
+
+subsys_initcall(sbus_init);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-19 19:44:01 +0000