From 455cc256eb23915100e203fb33ee143afd127954 Mon Sep 17 00:00:00 2001 From: Atsushi Nemoto Date: Fri, 25 Jul 2008 23:01:35 +0900 Subject: [MIPS] TXx9: PCI error handling From: Atsushi Nemoto Date: Thu, 24 Jul 2008 00:25:16 +0900 Subject: [PATCH] txx9: PCI error handling Add more control and detailed report on PCI error interrupt. Signed-off-by: Atsushi Nemoto Signed-off-by: Ralf Baechle --- arch/mips/pci/ops-tx3927.c | 34 ++++++++++++++++++++++ arch/mips/pci/ops-tx4927.c | 62 +++++++++++++++++++++++++++++++++++++++++ arch/mips/pci/pci-tx4927.c | 10 +++++++ arch/mips/pci/pci-tx4938.c | 10 +++++++ arch/mips/txx9/jmr3927/irq.c | 20 ------------- arch/mips/txx9/jmr3927/setup.c | 1 + arch/mips/txx9/rbtx4927/setup.c | 2 ++ arch/mips/txx9/rbtx4938/setup.c | 1 + 8 files changed, 120 insertions(+), 20 deletions(-) (limited to 'arch/mips') diff --git a/arch/mips/pci/ops-tx3927.c b/arch/mips/pci/ops-tx3927.c index c6bd79e71e2..31c15019659 100644 --- a/arch/mips/pci/ops-tx3927.c +++ b/arch/mips/pci/ops-tx3927.c @@ -37,8 +37,11 @@ #include #include #include +#include #include +#include +#include #include static int mkaddr(struct pci_bus *bus, unsigned char devfn, unsigned char where) @@ -194,3 +197,34 @@ void __init tx3927_pcic_setup(struct pci_controller *channel, PCI_COMMAND_PARITY | PCI_COMMAND_SERR; local_irq_restore(flags); } + +static irqreturn_t tx3927_pcierr_interrupt(int irq, void *dev_id) +{ + struct pt_regs *regs = get_irq_regs(); + + if (txx9_pci_err_action != TXX9_PCI_ERR_IGNORE) { + printk(KERN_WARNING "PCI error interrupt at 0x%08lx.\n", + regs->cp0_epc); + printk(KERN_WARNING "pcistat:%02x, lbstat:%04lx\n", + tx3927_pcicptr->pcistat, tx3927_pcicptr->lbstat); + } + if (txx9_pci_err_action != TXX9_PCI_ERR_PANIC) { + /* clear all pci errors */ + tx3927_pcicptr->pcistat |= TX3927_PCIC_PCISTATIM_ALL; + tx3927_pcicptr->istat = TX3927_PCIC_IIM_ALL; + tx3927_pcicptr->tstat = TX3927_PCIC_TIM_ALL; + tx3927_pcicptr->lbstat = TX3927_PCIC_LBIM_ALL; + return IRQ_HANDLED; + } + console_verbose(); + panic("PCI error."); +} + +void __init tx3927_setup_pcierr_irq(void) +{ + if (request_irq(TXX9_IRQ_BASE + TX3927_IR_PCI, + tx3927_pcierr_interrupt, + IRQF_DISABLED, "PCI error", + (void *)TX3927_PCIC_REG)) + printk(KERN_WARNING "Failed to request irq for PCIERR\n"); +} diff --git a/arch/mips/pci/ops-tx4927.c b/arch/mips/pci/ops-tx4927.c index 038e311b069..5989e747527 100644 --- a/arch/mips/pci/ops-tx4927.c +++ b/arch/mips/pci/ops-tx4927.c @@ -16,6 +16,8 @@ * option) any later version. */ #include +#include +#include #include static struct { @@ -431,6 +433,66 @@ void tx4927_report_pcic_status(void) } } +static void tx4927_dump_pcic_settings1(struct tx4927_pcic_reg __iomem *pcicptr) +{ + int i; + __u32 __iomem *preg = (__u32 __iomem *)pcicptr; + + printk(KERN_INFO "tx4927 pcic (0x%p) settings:", pcicptr); + for (i = 0; i < sizeof(struct tx4927_pcic_reg); i += 4, preg++) { + if (i % 32 == 0) { + printk(KERN_CONT "\n"); + printk(KERN_INFO "%04x:", i); + } + /* skip registers with side-effects */ + if (i == offsetof(struct tx4927_pcic_reg, g2pintack) + || i == offsetof(struct tx4927_pcic_reg, g2pspc) + || i == offsetof(struct tx4927_pcic_reg, g2pcfgadrs) + || i == offsetof(struct tx4927_pcic_reg, g2pcfgdata)) { + printk(KERN_CONT " XXXXXXXX"); + continue; + } + printk(KERN_CONT " %08x", __raw_readl(preg)); + } + printk(KERN_CONT "\n"); +} + +void tx4927_dump_pcic_settings(void) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(pcicptrs); i++) { + if (pcicptrs[i].pcicptr) + tx4927_dump_pcic_settings1(pcicptrs[i].pcicptr); + } +} + +irqreturn_t tx4927_pcierr_interrupt(int irq, void *dev_id) +{ + struct pt_regs *regs = get_irq_regs(); + struct tx4927_pcic_reg __iomem *pcicptr = + (struct tx4927_pcic_reg __iomem *)(unsigned long)dev_id; + + if (txx9_pci_err_action != TXX9_PCI_ERR_IGNORE) { + printk(KERN_WARNING "PCIERR interrupt at 0x%0*lx\n", + (int)(2 * sizeof(unsigned long)), regs->cp0_epc); + tx4927_report_pcic_status1(pcicptr); + } + if (txx9_pci_err_action != TXX9_PCI_ERR_PANIC) { + /* clear all pci errors */ + __raw_writel((__raw_readl(&pcicptr->pcistatus) & 0x0000ffff) + | (TX4927_PCIC_PCISTATUS_ALL << 16), + &pcicptr->pcistatus); + __raw_writel(TX4927_PCIC_G2PSTATUS_ALL, &pcicptr->g2pstatus); + __raw_writel(TX4927_PCIC_PBASTATUS_ALL, &pcicptr->pbastatus); + __raw_writel(TX4927_PCIC_PCICSTATUS_ALL, &pcicptr->pcicstatus); + return IRQ_HANDLED; + } + console_verbose(); + tx4927_dump_pcic_settings1(pcicptr); + panic("PCI error."); +} + #ifdef CONFIG_TOSHIBA_FPCIB0 static void __init tx4927_quirk_slc90e66_bridge(struct pci_dev *dev) { diff --git a/arch/mips/pci/pci-tx4927.c b/arch/mips/pci/pci-tx4927.c index 27e86a09dd4..aaa90059679 100644 --- a/arch/mips/pci/pci-tx4927.c +++ b/arch/mips/pci/pci-tx4927.c @@ -15,6 +15,7 @@ #include #include #include +#include #include #include @@ -81,3 +82,12 @@ int __init tx4927_pciclk66_setup(void) pciclk = -1; return pciclk; } + +void __init tx4927_setup_pcierr_irq(void) +{ + if (request_irq(TXX9_IRQ_BASE + TX4927_IR_PCIERR, + tx4927_pcierr_interrupt, + IRQF_DISABLED, "PCI error", + (void *)TX4927_PCIC_REG)) + printk(KERN_WARNING "Failed to request irq for PCIERR\n"); +} diff --git a/arch/mips/pci/pci-tx4938.c b/arch/mips/pci/pci-tx4938.c index e5375511c2b..60e2c52c2c5 100644 --- a/arch/mips/pci/pci-tx4938.c +++ b/arch/mips/pci/pci-tx4938.c @@ -15,6 +15,7 @@ #include #include #include +#include #include #include @@ -132,3 +133,12 @@ int tx4938_pcic1_map_irq(const struct pci_dev *dev, u8 slot) } return -1; } + +void __init tx4938_setup_pcierr_irq(void) +{ + if (request_irq(TXX9_IRQ_BASE + TX4938_IR_PCIERR, + tx4927_pcierr_interrupt, + IRQF_DISABLED, "PCI error", + (void *)TX4927_PCIC_REG)) + printk(KERN_WARNING "Failed to request irq for PCIERR\n"); +} diff --git a/arch/mips/txx9/jmr3927/irq.c b/arch/mips/txx9/jmr3927/irq.c index 070c9a115e5..f3b60233e99 100644 --- a/arch/mips/txx9/jmr3927/irq.c +++ b/arch/mips/txx9/jmr3927/irq.c @@ -103,22 +103,6 @@ static int jmr3927_irq_dispatch(int pending) return irq; } -#ifdef CONFIG_PCI -static irqreturn_t jmr3927_pcierr_interrupt(int irq, void *dev_id) -{ - printk(KERN_WARNING "PCI error interrupt (irq 0x%x).\n", irq); - printk(KERN_WARNING "pcistat:%02x, lbstat:%04lx\n", - tx3927_pcicptr->pcistat, tx3927_pcicptr->lbstat); - - return IRQ_HANDLED; -} -static struct irqaction pcierr_action = { - .handler = jmr3927_pcierr_interrupt, - .mask = CPU_MASK_NONE, - .name = "PCI error", -}; -#endif - static void __init jmr3927_irq_init(void); void __init jmr3927_irq_setup(void) @@ -143,10 +127,6 @@ void __init jmr3927_irq_setup(void) /* setup IOC interrupt 1 (PCI, MODEM) */ set_irq_chained_handler(JMR3927_IRQ_IOCINT, handle_simple_irq); -#ifdef CONFIG_PCI - setup_irq(JMR3927_IRQ_IRC_PCI, &pcierr_action); -#endif - /* enable all CPU interrupt bits. */ set_c0_status(ST0_IM); /* IE bit is still 0. */ } diff --git a/arch/mips/txx9/jmr3927/setup.c b/arch/mips/txx9/jmr3927/setup.c index 57dc91e7afa..7c16c402ff6 100644 --- a/arch/mips/txx9/jmr3927/setup.c +++ b/arch/mips/txx9/jmr3927/setup.c @@ -199,6 +199,7 @@ static void __init jmr3927_pci_setup(void) jmr3927_ioc_reg_out(0, JMR3927_IOC_RESET_ADDR); } tx3927_pcic_setup(c, JMR3927_SDRAM_SIZE, extarb); + tx3927_setup_pcierr_irq(); #endif /* CONFIG_PCI */ } diff --git a/arch/mips/txx9/rbtx4927/setup.c b/arch/mips/txx9/rbtx4927/setup.c index 88c05ccee3b..65b72247d32 100644 --- a/arch/mips/txx9/rbtx4927/setup.c +++ b/arch/mips/txx9/rbtx4927/setup.c @@ -103,6 +103,7 @@ static void __init tx4927_pci_setup(void) tx4927_report_pciclk(); tx4927_pcic_setup(tx4927_pcicptr, c, extarb); } + tx4927_setup_pcierr_irq(); } static void __init tx4937_pci_setup(void) @@ -149,6 +150,7 @@ static void __init tx4937_pci_setup(void) tx4938_report_pciclk(); tx4927_pcic_setup(tx4938_pcicptr, c, extarb); } + tx4938_setup_pcierr_irq(); } static void __init rbtx4927_arch_init(void) diff --git a/arch/mips/txx9/rbtx4938/setup.c b/arch/mips/txx9/rbtx4938/setup.c index fc9034db526..4454b7901cd 100644 --- a/arch/mips/txx9/rbtx4938/setup.c +++ b/arch/mips/txx9/rbtx4938/setup.c @@ -121,6 +121,7 @@ static void __init rbtx4938_pci_setup(void) register_pci_controller(c); tx4927_pcic_setup(tx4938_pcic1ptr, c, 0); } + tx4938_setup_pcierr_irq(); #endif /* CONFIG_PCI */ } -- cgit v1.2.3-70-g09d2