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linux/arch/sparc/kernel/pci_sabre.c
Rob Herring 29c990dfc7 sparc: Use of_node_name_eq for node name comparisons 
Convert string compares of DT node names to use of_node_name_eq helper
instead. This removes direct access to the node name pointer.

Cc: "David S. Miller" <davem@davemloft.net>
Cc: sparclinux@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-11-18 13:35:21 -08:00

615 lines
20 KiB
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Raw Blame History

// SPDX-License-Identifier: GPL-2.0
/* 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/export.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/of_device.h>
#include <asm/apb.h>
#include <asm/iommu.h>
#include <asm/irq.h>
#include <asm/prom.h>
#include <asm/upa.h>
#include "pci_impl.h"
#include "iommu_common.h"
#include "psycho_common.h"
#define DRIVER_NAME "sabre"
#define PFX DRIVER_NAME ": "
/* 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;
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 = upa_readq(afar_reg);
afsr = upa_readq(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;
upa_writeq(error_bits, afsr_reg);
/* 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. */
psycho_check_iommu_error(pbm, afsr, afar, UE_ERR);
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 = upa_readq(afar_reg);
afsr = upa_readq(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;
upa_writeq(error_bits, afsr_reg);
/* 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 void sabre_register_error_handlers(struct pci_pbm_info *pbm)
{
struct device_node *dp = pbm->op->dev.of_node;
struct platform_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->archdata.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.
*/
upa_writeq((SABRE_UEAFSR_PDRD | SABRE_UEAFSR_PDWR |
SABRE_UEAFSR_SDRD | SABRE_UEAFSR_SDWR |
SABRE_UEAFSR_SDTE | SABRE_UEAFSR_PDTE),
base + SABRE_UE_AFSR);
err = request_irq(op->archdata.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);
upa_writeq((SABRE_CEAFSR_PDRD | SABRE_CEAFSR_PDWR |
SABRE_CEAFSR_SDRD | SABRE_CEAFSR_SDWR),
base + SABRE_CE_AFSR);
err = request_irq(op->archdata.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->archdata.irqs[0], psycho_pcierr_intr, 0,
"SABRE_PCIERR", pbm);
if (err)
printk(KERN_WARNING "%s: Couldn't register PCIERR, err=%d.\n",
pbm->name, err);
tmp = upa_readq(base + SABRE_PCICTRL);
tmp |= SABRE_PCICTRL_ERREN;
upa_writeq(tmp, base + SABRE_PCICTRL);
}
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, struct device *parent)
{
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) {
printk(KERN_ERR PFX "Multiple controllers unsupported.\n");
return;
}
once++;
pbm->pci_bus = pci_scan_one_pbm(pbm, parent);
if (!pbm->pci_bus)
return;
sabre_root_bus = pbm->pci_bus;
apb_init(pbm->pci_bus);
sabre_register_error_handlers(pbm);
}
static void sabre_pbm_init(struct pci_pbm_info *pbm,
struct platform_device *op)
{
psycho_pbm_init_common(pbm, op, "SABRE", PBM_CHIP_TYPE_SABRE);
pbm->pci_afsr = pbm->controller_regs + SABRE_PIOAFSR;
pbm->pci_afar = pbm->controller_regs + SABRE_PIOAFAR;
pbm->pci_csr = pbm->controller_regs + SABRE_PCICTRL;
sabre_scan_bus(pbm, &op->dev);
}
static const struct of_device_id sabre_match[];
static int sabre_probe(struct platform_device *op)
{
const struct of_device_id *match;
const struct linux_prom64_registers *pr_regs;
struct device_node *dp = op->dev.of_node;
struct pci_pbm_info *pbm;
u32 upa_portid, dma_mask;
struct iommu *iommu;
int tsbsize, err;
const u32 *vdma;
u64 clear_irq;
match = of_match_device(sabre_match, &op->dev);
hummingbird_p = match && (match->data != NULL);
if (!hummingbird_p) {
struct device_node *cpu_dp;
/* Of course, Sun has to encode things a thousand
* different ways, inconsistently.
*/
for_each_node_by_type(cpu_dp, "cpu") {
if (of_node_name_eq(cpu_dp, "SUNW,UltraSPARC-IIe"))
hummingbird_p = 1;
}
}
err = -ENOMEM;
pbm = kzalloc(sizeof(*pbm), GFP_KERNEL);
if (!pbm) {
printk(KERN_ERR PFX "Cannot allocate pci_pbm_info.\n");
goto out_err;
}
iommu = kzalloc(sizeof(*iommu), GFP_KERNEL);
if (!iommu) {
printk(KERN_ERR PFX "Cannot allocate PBM iommu.\n");
goto out_free_controller;
}
pbm->iommu = iommu;
upa_portid = of_getintprop_default(dp, "upa-portid", 0xff);
pbm->portid = upa_portid;
/*
* Map in SABRE register set and report the presence of this SABRE.
*/
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;
}
/*
* 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)
upa_writeq(0x0UL, pbm->controller_regs + clear_irq);
/* Then OBIO */
for (clear_irq = SABRE_ICLR_SCSI; clear_irq < SABRE_ICLR_SCSI + 0x80; clear_irq += 8)
upa_writeq(0x0UL, pbm->controller_regs + clear_irq);
/* Error interrupts are enabled later after the bus scan. */
upa_writeq((SABRE_PCICTRL_MRLEN | SABRE_PCICTRL_SERR |
SABRE_PCICTRL_ARBPARK | SABRE_PCICTRL_AEN),
pbm->controller_regs + SABRE_PCICTRL);
/* 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);
if (!vdma) {
printk(KERN_ERR PFX "No virtual-dma property\n");
goto out_free_iommu;
}
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:
printk(KERN_ERR PFX "Strange virtual-dma size.\n");
goto out_free_iommu;
}
err = psycho_iommu_init(pbm, tsbsize, vdma[0], dma_mask, SABRE_WRSYNC);
if (err)
goto out_free_iommu;
/*
* Look for APB underneath.
*/
sabre_pbm_init(pbm, op);
pbm->next = pci_pbm_root;
pci_pbm_root = pbm;
dev_set_drvdata(&op->dev, pbm);
return 0;
out_free_iommu:
kfree(pbm->iommu);
out_free_controller:
kfree(pbm);
out_err:
return err;
}
static const struct of_device_id sabre_match[] = {
{
.name = "pci",
.compatible = "pci108e,a001",
.data = (void *) 1,
},
{
.name = "pci",
.compatible = "pci108e,a000",
},
{},
};
static struct platform_driver sabre_driver = {
.driver = {
.name = DRIVER_NAME,
.of_match_table = sabre_match,
},
.probe = sabre_probe,
};
static int __init sabre_init(void)
{
return platform_driver_register(&sabre_driver);
}
subsys_initcall(sabre_init);
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