| // 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_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); |
