// SPDX-License-Identifier: GPL-2.0
/* 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/export.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <asm/iommu.h>
#include <asm/irq.h>
#include <asm/starfire.h>
#include <asm/prom.h>
#include <asm/upa.h>
#include "pci_impl.h"
#include "iommu_common.h"
#include "psycho_common.h"
#define DRIVER_NAME "psycho"
#define PFX DRIVER_NAME ": "
/* 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 */
/* PSYCHO error handling support. */
/* 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_STC_TAG_A 0xb800UL
#define PSYCHO_STC_TAG_B 0xc800UL
#define PSYCHO_STC_LINE_A 0xb900UL
#define PSYCHO_STC_LINE_B 0xc900UL
/* 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_DATA 0xa600UL
/* 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;
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 = upa_readq(afar_reg);
afsr = upa_readq(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;
upa_writeq(error_bits, afsr_reg);
/* 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(pbm, afsr, afar, UE_ERR);
if (pbm->sibling)
psycho_check_iommu_error(pbm->sibling, 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 = upa_readq(afar_reg);
afsr = upa_readq(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;
upa_writeq(error_bits, afsr_reg);
/* 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_PCI_AFAR_A 0x2018UL
#define PSYCHO_PCI_AFAR_B 0x4018UL
/* 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 platform_device *op = of_find_device_by_node(pbm->op->dev.of_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->archdata.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.
*/
err = request_irq(op->archdata.irqs[1], psycho_ue_intr, IRQF_SHARED,
"PSYCHO_UE", pbm);
err = request_irq(op->archdata.irqs[2], psycho_ce_intr, IRQF_SHARED,
"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->archdata.irqs[0], psycho_pcierr_intr, IRQF_SHARED,
"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. */
upa_writeq((PSYCHO_ECCCTRL_EE |
PSYCHO_ECCCTRL_UE |
PSYCHO_ECCCTRL_CE), base + PSYCHO_ECC_CTRL);
/* Enable PCI Error interrupts and clear error
* bits for each PBM.
*/
tmp = upa_readq(base + PSYCHO_PCIA_CTRL);
tmp |= (PSYCHO_PCICTRL_SERR |
PSYCHO_PCICTRL_SBH_ERR |
PSYCHO_PCICTRL_EEN);
tmp &= ~(PSYCHO_PCICTRL_SBH_INT);
upa_writeq(tmp, base + PSYCHO_PCIA_CTRL);
tmp = upa_readq(base + PSYCHO_PCIB_CTRL);
tmp |= (PSYCHO_PCICTRL_SERR |
PSYCHO_PCICTRL_SBH_ERR |
PSYCHO_PCICTRL_EEN);
tmp &= ~(PSYCHO_PCICTRL_SBH_INT);
upa_writeq(tmp, base + PSYCHO_PCIB_CTRL);
}
/* 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,
struct device *parent)
{
pbm_config_busmastering(pbm);
pbm->is_66mhz_capable = 0;
pbm->pci_bus = pci_scan_one_pbm(pbm, parent);
/* After the PCI bus scan is complete, we can register
* the error interrupt handlers.
*/
psycho_register_error_handlers(pbm);
}
#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;
upa_writeq(5, pbm->controller_regs + PSYCHO_IRQ_RETRY);
/* Enable arbiter for all PCI slots. */
tmp = upa_readq(pbm->controller_regs + PSYCHO_PCIA_CTRL);
tmp |= PSYCHO_PCICTRL_AEN;
upa_writeq(tmp, pbm->controller_regs + PSYCHO_PCIA_CTRL);
tmp = upa_readq(pbm->controller_regs + PSYCHO_PCIB_CTRL);
tmp |= PSYCHO_PCICTRL_AEN;
upa_writeq(tmp, pbm->controller_regs + PSYCHO_PCIB_CTRL);
/* Disable DMA write / PIO read synchronization on
* both PCI bus segments.
* [ U2P Erratum 1243770, STP2223BGA data sheet ]
*/
tmp = upa_readq(pbm->controller_regs + PSYCHO_PCIA_DIAG);
tmp |= PSYCHO_PCIDIAG_DDWSYNC;
upa_writeq(tmp, pbm->controller_regs + PSYCHO_PCIA_DIAG);
tmp = upa_readq(pbm->controller_regs + PSYCHO_PCIB_DIAG);
tmp |= PSYCHO_PCIDIAG_DDWSYNC;
upa_writeq(tmp, pbm->controller_regs + PSYCHO_PCIB_DIAG);
}
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;
pbm->stc.strbuf_err_stat = base + PSYCHO_STC_ERR_A;
pbm->stc.strbuf_tag_diag = base + PSYCHO_STC_TAG_A;
pbm->stc.strbuf_line_diag= base + PSYCHO_STC_LINE_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;
pbm->stc.strbuf_err_stat = base + PSYCHO_STC_ERR_B;
pbm->stc.strbuf_tag_diag = base + PSYCHO_STC_TAG_B;
pbm->stc.strbuf_line_diag= base + PSYCHO_STC_LINE_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 = upa_readq(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
upa_writeq(control, pbm->stc.strbuf_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_pbm_info *pbm,
struct platform_device *op, int is_pbm_a)
{
psycho_pbm_init_common(pbm, op, "PSYCHO", PBM_CHIP_TYPE_PSYCHO);
psycho_pbm_strbuf_init(pbm, is_pbm_a);
psycho_scan_bus(pbm, &op->dev);
}
static struct pci_pbm_info *psycho_find_sibling(u32 upa_portid)
{
struct pci_pbm_info *pbm;
for (pbm = pci_pbm_root; pbm; pbm = pbm->next) {
if (pbm->portid == upa_portid)
return pbm;
}
return NULL;
}
#define PSYCHO_CONFIGSPACE 0x001000000UL
static int psycho_probe(struct platform_device *op)
{
const struct linux_prom64_registers *pr_regs;
struct device_node *dp = op->dev.of_node;
struct pci_pbm_info *pbm;
struct iommu *iommu;
int is_pbm_a, err;
u32 upa_portid;
upa_portid = of_getintprop_default(dp, "upa-portid", 0xff);
err = -ENOMEM;
pbm = kzalloc(sizeof(*pbm), GFP_KERNEL);
if (!pbm) {
printk(KERN_ERR PFX "Cannot allocate pci_pbm_info.\n");
goto out_err;
}
pbm->sibling = psycho_find_sibling(upa_portid);
if (pbm->sibling) {
iommu = pbm->sibling->iommu;
} else {
iommu = kzalloc(sizeof(struct iommu), GFP_KERNEL);
if (!iommu) {
printk(KERN_ERR PFX "Cannot allocate PBM iommu.\n");
goto out_free_controller;
}
}
pbm->iommu = iommu;
pbm->portid = upa_portid;
pr_regs = of_get_property(dp, "reg", NULL);
err = -ENODEV;
if (!pr_regs) {
printk(KERN_ERR PFX "No reg property.\n");
goto out_free_iommu;
}
is_pbm_a = ((pr_regs[0].phys_addr & 0x6000) == 0x2000);
pbm->controller_regs = pr_regs[2].phys_addr;
pbm->config_space = (pr_regs[2].phys_addr + PSYCHO_CONFIGSPACE);
if (is_pbm_a) {
pbm->pci_afsr = pbm->controller_regs + PSYCHO_PCI_AFSR_A;
pbm->pci_afar = pbm->controller_regs + PSYCHO_PCI_AFAR_A;
pbm->pci_csr = pbm->controller_regs + PSYCHO_PCIA_CTRL;
} else {
pbm->pci_afsr = pbm->controller_regs + PSYCHO_PCI_AFSR_B;
pbm->pci_afar = pbm->controller_regs + PSYCHO_PCI_AFAR_B;
pbm->pci_csr = pbm->controller_regs + PSYCHO_PCIB_CTRL;
}
psycho_controller_hwinit(pbm);
if (!pbm->sibling) {
err = psycho_iommu_init(pbm, 128, 0xc0000000,
0xffffffff, PSYCHO_CONTROL);
if (err)
goto out_free_iommu;
/* If necessary, hook us up for starfire IRQ translations. */
if (this_is_starfire)
starfire_hookup(pbm->portid);
}
psycho_pbm_init(pbm, op, is_pbm_a);
pbm->next = pci_pbm_root;
pci_pbm_root = pbm;
if (pbm->sibling)
pbm->sibling->sibling = pbm;
dev_set_drvdata(&op->dev, pbm);
return 0;
out_free_iommu:
if (!pbm->sibling)
kfree(pbm->iommu);
out_free_controller:
kfree(pbm);
out_err:
return err;
}
static const struct of_device_id psycho_match[] = {
{
.name = "pci",
.compatible = "pci108e,8000",
},
{},
};
static struct platform_driver psycho_driver = {
.driver = {
.name = DRIVER_NAME,
.of_match_table = psycho_match,
},
.probe = psycho_probe,
};
static int __init psycho_init(void)
{
return platform_driver_register(&psycho_driver);
}
subsys_initcall(psycho_init);