diff options
Diffstat (limited to 'arch/powerpc/platforms/pseries')
| -rw-r--r-- | arch/powerpc/platforms/pseries/ras.c | 82 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/setup.c | 244 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/smp.c | 32 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/xics.c | 718 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/xics.h | 17 |
5 files changed, 641 insertions, 452 deletions
diff --git a/arch/powerpc/platforms/pseries/ras.c b/arch/powerpc/platforms/pseries/ras.c index 9639c66b453..9df783088b6 100644 --- a/arch/powerpc/platforms/pseries/ras.c +++ b/arch/powerpc/platforms/pseries/ras.c @@ -72,32 +72,62 @@ static irqreturn_t ras_error_interrupt(int irq, void *dev_id, /* #define DEBUG */ -static void request_ras_irqs(struct device_node *np, char *propname, + +static void request_ras_irqs(struct device_node *np, irqreturn_t (*handler)(int, void *, struct pt_regs *), const char *name) { - unsigned int *ireg, len, i; - int virq, n_intr; - - ireg = (unsigned int *)get_property(np, propname, &len); - if (ireg == NULL) - return; - n_intr = prom_n_intr_cells(np); - len /= n_intr * sizeof(*ireg); - - for (i = 0; i < len; i++) { - virq = virt_irq_create_mapping(*ireg); - if (virq == NO_IRQ) { - printk(KERN_ERR "Unable to allocate interrupt " - "number for %s\n", np->full_name); - return; + int i, index, count = 0; + struct of_irq oirq; + u32 *opicprop; + unsigned int opicplen; + unsigned int virqs[16]; + + /* Check for obsolete "open-pic-interrupt" property. If present, then + * map those interrupts using the default interrupt host and default + * trigger + */ + opicprop = (u32 *)get_property(np, "open-pic-interrupt", &opicplen); + if (opicprop) { + opicplen /= sizeof(u32); + for (i = 0; i < opicplen; i++) { + if (count > 15) + break; + virqs[count] = irq_create_mapping(NULL, *(opicprop++), + IRQ_TYPE_NONE); + if (virqs[count] == NO_IRQ) + printk(KERN_ERR "Unable to allocate interrupt " + "number for %s\n", np->full_name); + else + count++; + } - if (request_irq(irq_offset_up(virq), handler, 0, name, NULL)) { + } + /* Else use normal interrupt tree parsing */ + else { + /* First try to do a proper OF tree parsing */ + for (index = 0; of_irq_map_one(np, index, &oirq) == 0; + index++) { + if (count > 15) + break; + virqs[count] = irq_create_of_mapping(oirq.controller, + oirq.specifier, + oirq.size); + if (virqs[count] == NO_IRQ) + printk(KERN_ERR "Unable to allocate interrupt " + "number for %s\n", np->full_name); + else + count++; + } + } + + /* Now request them */ + for (i = 0; i < count; i++) { + if (request_irq(virqs[i], handler, 0, name, NULL)) { printk(KERN_ERR "Unable to request interrupt %d for " - "%s\n", irq_offset_up(virq), np->full_name); + "%s\n", virqs[i], np->full_name); return; } - ireg += n_intr; } } @@ -115,20 +145,14 @@ static int __init init_ras_IRQ(void) /* Internal Errors */ np = of_find_node_by_path("/event-sources/internal-errors"); if (np != NULL) { - request_ras_irqs(np, "open-pic-interrupt", ras_error_interrupt, - "RAS_ERROR"); - request_ras_irqs(np, "interrupts", ras_error_interrupt, - "RAS_ERROR"); + request_ras_irqs(np, ras_error_interrupt, "RAS_ERROR"); of_node_put(np); } /* EPOW Events */ np = of_find_node_by_path("/event-sources/epow-events"); if (np != NULL) { - request_ras_irqs(np, "open-pic-interrupt", ras_epow_interrupt, - "RAS_EPOW"); - request_ras_irqs(np, "interrupts", ras_epow_interrupt, - "RAS_EPOW"); + request_ras_irqs(np, ras_epow_interrupt, "RAS_EPOW"); of_node_put(np); } @@ -162,7 +186,7 @@ ras_epow_interrupt(int irq, void *dev_id, struct pt_regs * regs) status = rtas_call(ras_check_exception_token, 6, 1, NULL, RAS_VECTOR_OFFSET, - virt_irq_to_real(irq_offset_down(irq)), + irq_map[irq].hwirq, RTAS_EPOW_WARNING | RTAS_POWERMGM_EVENTS, critical, __pa(&ras_log_buf), rtas_get_error_log_max()); @@ -198,7 +222,7 @@ ras_error_interrupt(int irq, void *dev_id, struct pt_regs * regs) status = rtas_call(ras_check_exception_token, 6, 1, NULL, RAS_VECTOR_OFFSET, - virt_irq_to_real(irq_offset_down(irq)), + irq_map[irq].hwirq, RTAS_INTERNAL_ERROR, 1 /*Time Critical */, __pa(&ras_log_buf), rtas_get_error_log_max()); diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c index 999509d28af..54a52437265 100644 --- a/arch/powerpc/platforms/pseries/setup.c +++ b/arch/powerpc/platforms/pseries/setup.c @@ -76,6 +76,9 @@ #define DBG(fmt...) #endif +/* move those away to a .h */ +extern void smp_init_pseries_mpic(void); +extern void smp_init_pseries_xics(void); extern void find_udbg_vterm(void); int fwnmi_active; /* TRUE if an FWNMI handler is present */ @@ -83,7 +86,7 @@ int fwnmi_active; /* TRUE if an FWNMI handler is present */ static void pseries_shared_idle_sleep(void); static void pseries_dedicated_idle_sleep(void); -struct mpic *pSeries_mpic; +static struct device_node *pSeries_mpic_node; static void pSeries_show_cpuinfo(struct seq_file *m) { @@ -118,63 +121,92 @@ static void __init fwnmi_init(void) fwnmi_active = 1; } -static void __init pSeries_init_mpic(void) +void pseries_8259_cascade(unsigned int irq, struct irq_desc *desc, + struct pt_regs *regs) { - unsigned int *addrp; - struct device_node *np; - unsigned long intack = 0; - - /* All ISUs are setup, complete initialization */ - mpic_init(pSeries_mpic); - - /* Check what kind of cascade ACK we have */ - if (!(np = of_find_node_by_name(NULL, "pci")) - || !(addrp = (unsigned int *) - get_property(np, "8259-interrupt-acknowledge", NULL))) - printk(KERN_ERR "Cannot find pci to get ack address\n"); - else - intack = addrp[prom_n_addr_cells(np)-1]; - of_node_put(np); - - /* Setup the legacy interrupts & controller */ - i8259_init(intack, 0); - - /* Hook cascade to mpic */ - mpic_setup_cascade(NUM_ISA_INTERRUPTS, i8259_irq_cascade, NULL); + unsigned int cascade_irq = i8259_irq(regs); + if (cascade_irq != NO_IRQ) + generic_handle_irq(cascade_irq, regs); + desc->chip->eoi(irq); } -static void __init pSeries_setup_mpic(void) +static void __init pseries_mpic_init_IRQ(void) { + struct device_node *np, *old, *cascade = NULL; + unsigned int *addrp; + unsigned long intack = 0; unsigned int *opprop; unsigned long openpic_addr = 0; - unsigned char senses[NR_IRQS - NUM_ISA_INTERRUPTS]; - struct device_node *root; - int irq_count; + unsigned int cascade_irq; + int naddr, n, i, opplen; + struct mpic *mpic; - /* Find the Open PIC if present */ - root = of_find_node_by_path("/"); - opprop = (unsigned int *) get_property(root, "platform-open-pic", NULL); + np = of_find_node_by_path("/"); + naddr = prom_n_addr_cells(np); + opprop = (unsigned int *) get_property(np, "platform-open-pic", &opplen); if (opprop != 0) { - int n = prom_n_addr_cells(root); - - for (openpic_addr = 0; n > 0; --n) - openpic_addr = (openpic_addr << 32) + *opprop++; + openpic_addr = of_read_number(opprop, naddr); printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr); } - of_node_put(root); + of_node_put(np); BUG_ON(openpic_addr == 0); - /* Get the sense values from OF */ - prom_get_irq_senses(senses, NUM_ISA_INTERRUPTS, NR_IRQS); - /* Setup the openpic driver */ - irq_count = NR_IRQS - NUM_ISA_INTERRUPTS - 4; /* leave room for IPIs */ - pSeries_mpic = mpic_alloc(openpic_addr, MPIC_PRIMARY, - 16, 16, irq_count, /* isu size, irq offset, irq count */ - NR_IRQS - 4, /* ipi offset */ - senses, irq_count, /* sense & sense size */ - " MPIC "); + mpic = mpic_alloc(pSeries_mpic_node, openpic_addr, + MPIC_PRIMARY, + 16, 250, /* isu size, irq count */ + " MPIC "); + BUG_ON(mpic == NULL); + + /* Add ISUs */ + opplen /= sizeof(u32); + for (n = 0, i = naddr; i < opplen; i += naddr, n++) { + unsigned long isuaddr = of_read_number(opprop + i, naddr); + mpic_assign_isu(mpic, n, isuaddr); + } + + /* All ISUs are setup, complete initialization */ + mpic_init(mpic); + + /* Look for cascade */ + for_each_node_by_type(np, "interrupt-controller") + if (device_is_compatible(np, "chrp,iic")) { + cascade = np; + break; + } + if (cascade == NULL) + return; + + cascade_irq = irq_of_parse_and_map(cascade, 0); + if (cascade == NO_IRQ) { + printk(KERN_ERR "xics: failed to map cascade interrupt"); + return; + } + + /* Check ACK type */ + for (old = of_node_get(cascade); old != NULL ; old = np) { + np = of_get_parent(old); + of_node_put(old); + if (np == NULL) + break; + if (strcmp(np->name, "pci") != 0) + continue; + addrp = (u32 *)get_property(np, "8259-interrupt-acknowledge", + NULL); + if (addrp == NULL) + continue; + naddr = prom_n_addr_cells(np); + intack = addrp[naddr-1]; + if (naddr > 1) + intack |= ((unsigned long)addrp[naddr-2]) << 32; + } + if (intack) + printk(KERN_DEBUG "mpic: PCI 8259 intack at 0x%016lx\n", + intack); + i8259_init(cascade, intack); + of_node_put(cascade); + set_irq_chained_handler(cascade_irq, pseries_8259_cascade); } static void pseries_lpar_enable_pmcs(void) @@ -192,23 +224,67 @@ static void pseries_lpar_enable_pmcs(void) get_lppaca()->pmcregs_in_use = 1; } -static void __init pSeries_setup_arch(void) +#ifdef CONFIG_KEXEC +static void pseries_kexec_cpu_down_mpic(int crash_shutdown, int secondary) { - /* Fixup ppc_md depending on the type of interrupt controller */ - if (ppc64_interrupt_controller == IC_OPEN_PIC) { - ppc_md.init_IRQ = pSeries_init_mpic; - ppc_md.get_irq = mpic_get_irq; - /* Allocate the mpic now, so that find_and_init_phbs() can - * fill the ISUs */ - pSeries_setup_mpic(); - } else { - ppc_md.init_IRQ = xics_init_IRQ; - ppc_md.get_irq = xics_get_irq; + mpic_teardown_this_cpu(secondary); +} + +static void pseries_kexec_cpu_down_xics(int crash_shutdown, int secondary) +{ + /* Don't risk a hypervisor call if we're crashing */ + if (firmware_has_feature(FW_FEATURE_SPLPAR) && !crash_shutdown) { + unsigned long vpa = __pa(get_lppaca()); + + if (unregister_vpa(hard_smp_processor_id(), vpa)) { + printk("VPA deregistration of cpu %u (hw_cpu_id %d) " + "failed\n", smp_processor_id(), + hard_smp_processor_id()); + } } + xics_teardown_cpu(secondary); +} +#endif /* CONFIG_KEXEC */ +static void __init pseries_discover_pic(void) +{ + struct device_node *np; + char *typep; + + for (np = NULL; (np = of_find_node_by_name(np, + "interrupt-controller"));) { + typep = (char *)get_property(np, "compatible", NULL); + if (strstr(typep, "open-pic")) { + pSeries_mpic_node = of_node_get(np); + ppc_md.init_IRQ = pseries_mpic_init_IRQ; + ppc_md.get_irq = mpic_get_irq; +#ifdef CONFIG_KEXEC + ppc_md.kexec_cpu_down = pseries_kexec_cpu_down_mpic; +#endif +#ifdef CONFIG_SMP + smp_init_pseries_mpic(); +#endif + return; + } else if (strstr(typep, "ppc-xicp")) { + ppc_md.init_IRQ = xics_init_IRQ; +#ifdef CONFIG_KEXEC + ppc_md.kexec_cpu_down = pseries_kexec_cpu_down_xics; +#endif #ifdef CONFIG_SMP - smp_init_pSeries(); + smp_init_pseries_xics(); #endif + return; + } + } + printk(KERN_ERR "pSeries_discover_pic: failed to recognize" + " interrupt-controller\n"); +} + +static void __init pSeries_setup_arch(void) +{ + /* Discover PIC type and setup ppc_md accordingly */ + pseries_discover_pic(); + /* openpic global configuration register (64-bit format). */ /* openpic Interrupt Source Unit pointer (64-bit format). */ /* python0 facility area (mmio) (64-bit format) REAL address. */ @@ -260,41 +336,11 @@ static int __init pSeries_init_panel(void) } arch_initcall(pSeries_init_panel); -static void __init pSeries_discover_pic(void) -{ - struct device_node *np; - char *typep; - - /* - * Setup interrupt mapping options that are needed for finish_device_tree - * to properly parse the OF interrupt tree & do the virtual irq mapping - */ - __irq_offset_value = NUM_ISA_INTERRUPTS; - ppc64_interrupt_controller = IC_INVALID; - for (np = NULL; (np = of_find_node_by_name(np, "interrupt-controller"));) { - typep = (char *)get_property(np, "compatible", NULL); - if (strstr(typep, "open-pic")) { - ppc64_interrupt_controller = IC_OPEN_PIC; - break; - } else if (strstr(typep, "ppc-xicp")) { - ppc64_interrupt_controller = IC_PPC_XIC; - break; - } - } - if (ppc64_interrupt_controller == IC_INVALID) - printk("pSeries_discover_pic: failed to recognize" - " interrupt-controller\n"); - -} - static void pSeries_mach_cpu_die(void) { local_irq_disable(); idle_task_exit(); - /* Some hardware requires clearing the CPPR, while other hardware does not - * it is safe either way - */ - pSeriesLP_cppr_info(0, 0); + xics_teardown_cpu(0); rtas_stop_self(); /* Should never get here... */ BUG(); @@ -332,8 +378,6 @@ static void __init pSeries_init_early(void) iommu_init_early_pSeries(); - pSeries_discover_pic(); - DBG(" <- pSeries_init_early()\n"); } @@ -505,27 +549,6 @@ static int pSeries_pci_probe_mode(struct pci_bus *bus) return PCI_PROBE_NORMAL; } -#ifdef CONFIG_KEXEC -static void pseries_kexec_cpu_down(int crash_shutdown, int secondary) -{ - /* Don't risk a hypervisor call if we're crashing */ - if (firmware_has_feature(FW_FEATURE_SPLPAR) && !crash_shutdown) { - unsigned long vpa = __pa(get_lppaca()); - - if (unregister_vpa(hard_smp_processor_id(), vpa)) { - printk("VPA deregistration of cpu %u (hw_cpu_id %d) " - "failed\n", smp_processor_id(), - hard_smp_processor_id()); - } - } - - if (ppc64_interrupt_controller == IC_OPEN_PIC) - mpic_teardown_this_cpu(secondary); - else - xics_teardown_cpu(secondary); -} -#endif - define_machine(pseries) { .name = "pSeries", .probe = pSeries_probe, @@ -550,7 +573,6 @@ define_machine(pseries) { .system_reset_exception = pSeries_system_reset_exception, .machine_check_exception = pSeries_machine_check_exception, #ifdef CONFIG_KEXEC - .kexec_cpu_down = pseries_kexec_cpu_down, .machine_kexec = default_machine_kexec, .machine_kexec_prepare = default_machine_kexec_prepare, .machine_crash_shutdown = default_machine_crash_shutdown, diff --git a/arch/powerpc/platforms/pseries/smp.c b/arch/powerpc/platforms/pseries/smp.c index 4ad144df49c..ac61098ff40 100644 --- a/arch/powerpc/platforms/pseries/smp.c +++ b/arch/powerpc/platforms/pseries/smp.c @@ -416,27 +416,12 @@ static struct smp_ops_t pSeries_xics_smp_ops = { #endif /* This is called very early */ -void __init smp_init_pSeries(void) +static void __init smp_init_pseries(void) { int i; DBG(" -> smp_init_pSeries()\n"); - switch (ppc64_interrupt_controller) { -#ifdef CONFIG_MPIC - case IC_OPEN_PIC: - smp_ops = &pSeries_mpic_smp_ops; - break; -#endif -#ifdef CONFIG_XICS - case IC_PPC_XIC: - smp_ops = &pSeries_xics_smp_ops; - break; -#endif - default: - panic("Invalid interrupt controller"); - } - #ifdef CONFIG_HOTPLUG_CPU smp_ops->cpu_disable = pSeries_cpu_disable; smp_ops->cpu_die = pSeries_cpu_die; @@ -471,3 +456,18 @@ void __init smp_init_pSeries(void) DBG(" <- smp_init_pSeries()\n"); } +#ifdef CONFIG_MPIC +void __init smp_init_pseries_mpic(void) +{ + smp_ops = &pSeries_mpic_smp_ops; + + smp_init_pseries(); +} +#endif + +void __init smp_init_pseries_xics(void) +{ + smp_ops = &pSeries_xics_smp_ops; + + smp_init_pseries(); +} diff --git a/arch/powerpc/platforms/pseries/xics.c b/arch/powerpc/platforms/pseries/xics.c index 2ffebe31cb2..716972aa977 100644 --- a/arch/powerpc/platforms/pseries/xics.c +++ b/arch/powerpc/platforms/pseries/xics.c @@ -8,6 +8,9 @@ * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ + +#undef DEBUG + #include <linux/types.h> #include <linux/threads.h> #include <linux/kernel.h> @@ -19,6 +22,7 @@ #include <linux/gfp.h> #include <linux/radix-tree.h> #include <linux/cpu.h> + #include <asm/firmware.h> #include <asm/prom.h> #include <asm/io.h> @@ -31,26 +35,6 @@ #include "xics.h" -static unsigned int xics_startup(unsigned int irq); -static void xics_enable_irq(unsigned int irq); -static void xics_disable_irq(unsigned int irq); -static void xics_mask_and_ack_irq(unsigned int irq); -static void xics_end_irq(unsigned int irq); -static void xics_set_affinity(unsigned int irq_nr, cpumask_t cpumask); - -static struct hw_interrupt_type xics_pic = { - .typename = " XICS ", - .startup = xics_startup, - .enable = xics_enable_irq, - .disable = xics_disable_irq, - .ack = xics_mask_and_ack_irq, - .end = xics_end_irq, - .set_affinity = xics_set_affinity -}; - -/* This is used to map real irq numbers to virtual */ -static struct radix_tree_root irq_map = RADIX_TREE_INIT(GFP_ATOMIC); - #define XICS_IPI 2 #define XICS_IRQ_SPURIOUS 0 @@ -81,12 +65,12 @@ struct xics_ipl { static struct xics_ipl __iomem *xics_per_cpu[NR_CPUS]; -static int xics_irq_8259_cascade = 0; -static int xics_irq_8259_cascade_real = 0; static unsigned int default_server = 0xFF; static unsigned int default_distrib_server = 0; static unsigned int interrupt_server_size = 8; +static struct irq_host *xics_host; + /* * XICS only has a single IPI, so encode the messages per CPU */ @@ -98,48 +82,34 @@ static int ibm_set_xive; static int ibm_int_on; static int ibm_int_off; -typedef struct { - int (*xirr_info_get)(int cpu); - void (*xirr_info_set)(int cpu, int val); - void (*cppr_info)(int cpu, u8 val); - void (*qirr_info)(int cpu, u8 val); -} xics_ops; +/* Direct HW low level accessors */ -/* SMP */ -static int pSeries_xirr_info_get(int n_cpu) +static inline unsigned int direct_xirr_info_get(int n_cpu) { return in_be32(&xics_per_cpu[n_cpu]->xirr.word); } -static void pSeries_xirr_info_set(int n_cpu, int value) +static inline void direct_xirr_info_set(int n_cpu, int value) { out_be32(&xics_per_cpu[n_cpu]->xirr.word, value); } -static void pSeries_cppr_info(int n_cpu, u8 value) +static inline void direct_cppr_info(int n_cpu, u8 value) { out_8(&xics_per_cpu[n_cpu]->xirr.bytes[0], value); } -static void pSeries_qirr_info(int n_cpu, u8 value) +static inline void direct_qirr_info(int n_cpu, u8 value) { out_8(&xics_per_cpu[n_cpu]->qirr.bytes[0], value); } -static xics_ops pSeries_ops = { - pSeries_xirr_info_get, - pSeries_xirr_info_set, - pSeries_cppr_info, - pSeries_qirr_info -}; -static xics_ops *ops = &pSeries_ops; +/* LPAR low level accessors */ -/* LPAR */ - static inline long plpar_eoi(unsigned long xirr) { return plpar_hcall_norets(H_EOI, xirr); @@ -161,7 +131,7 @@ static inline long plpar_xirr(unsigned long *xirr_ret) return plpar_hcall(H_XIRR, 0, 0, 0, 0, xirr_ret, &dummy, &dummy); } -static int pSeriesLP_xirr_info_get(int n_cpu) +static inline unsigned int lpar_xirr_info_get(int n_cpu) { unsigned long lpar_rc; unsigned long return_value; @@ -169,10 +139,10 @@ static int pSeriesLP_xirr_info_get(int n_cpu) lpar_rc = plpar_xirr(&return_value); if (lpar_rc != H_SUCCESS) panic(" bad return code xirr - rc = %lx \n", lpar_rc); - return (int)return_value; + return (unsigned int)return_value; } -static void pSeriesLP_xirr_info_set(int n_cpu, int value) +static inline void lpar_xirr_info_set(int n_cpu, int value) { unsigned long lpar_rc; unsigned long val64 = value & 0xffffffff; @@ -183,7 +153,7 @@ static void pSeriesLP_xirr_info_set(int n_cpu, int value) val64); } -void pSeriesLP_cppr_info(int n_cpu, u8 value) +static inline void lpar_cppr_info(int n_cpu, u8 value) { unsigned long lpar_rc; @@ -192,7 +162,7 @@ void pSeriesLP_cppr_info(int n_cpu, u8 value) panic("bad return code cppr - rc = %lx\n", lpar_rc); } -static void pSeriesLP_qirr_info(int n_cpu , u8 value) +static inline void lpar_qirr_info(int n_cpu , u8 value) { unsigned long lpar_rc; @@ -201,43 +171,16 @@ static void pSeriesLP_qirr_info(int n_cpu , u8 value) panic("bad return code qirr - rc = %lx\n", lpar_rc); } -xics_ops pSeriesLP_ops = { - pSeriesLP_xirr_info_get, - pSeriesLP_xirr_info_set, - pSeriesLP_cppr_info, - pSeriesLP_qirr_info -}; - -static unsigned int xics_startup(unsigned int virq) -{ - unsigned int irq; - - irq = irq_offset_down(virq); - if (radix_tree_insert(&irq_map, virt_irq_to_real(irq), - &virt_irq_to_real_map[irq]) == -ENOMEM) - printk(KERN_CRIT "Out of memory creating real -> virtual" - " IRQ mapping for irq %u (real 0x%x)\n", - virq, virt_irq_to_real(irq)); - xics_enable_irq(virq); - return 0; /* return value is ignored */ -} -static unsigned int real_irq_to_virt(unsigned int real_irq) -{ - unsigned int *ptr; +/* High level handlers and init code */ - ptr = radix_tree_lookup(&irq_map, real_irq); - if (ptr == NULL) - return NO_IRQ; - return ptr - virt_irq_to_real_map; -} #ifdef CONFIG_SMP -static int get_irq_server(unsigned int irq) +static int get_irq_server(unsigned int virq) { unsigned int server; /* For the moment only implement delivery to all cpus or one cpu */ - cpumask_t cpumask = irq_desc[irq].affinity; + cpumask_t cpumask = irq_desc[virq].affinity; cpumask_t tmp = CPU_MASK_NONE; if (!distribute_irqs) @@ -258,23 +201,28 @@ static int get_irq_server(unsigned int irq) } #else -static int get_irq_server(unsigned int irq) +static int get_irq_server(unsigned int virq) { return default_server; } #endif -static void xics_enable_irq(unsigned int virq) + +static void xics_unmask_irq(unsigned int virq) { unsigned int irq; int call_status; unsigned int server; - irq = virt_irq_to_real(irq_offset_down(virq)); - if (irq == XICS_IPI) + pr_debug("xics: unmask virq %d\n", virq); + + irq = (unsigned int)irq_map[virq].hwirq; + pr_debug(" -> map to hwirq 0x%x\n", irq); + if (irq == XICS_IPI || irq == XICS_IRQ_SPURIOUS) return; server = get_irq_server(virq); + call_status = rtas_call(ibm_set_xive, 3, 1, NULL, irq, server, DEFAULT_PRIORITY); if (call_status != 0) { @@ -293,7 +241,7 @@ static void xics_enable_irq(unsigned int virq) } } -static void xics_disable_real_irq(unsigned int irq) +static void xics_mask_real_irq(unsigned int irq) { int call_status; unsigned int server; @@ -318,75 +266,86 @@ static void xics_disable_real_irq(unsigned int irq) } } -static void xics_disable_irq(unsigned int virq) +static void xics_mask_irq(unsigned int virq) { unsigned int irq; - irq = virt_irq_to_real(irq_offset_down(virq)); - xics_disable_real_irq(irq); + pr_debug("xics: mask virq %d\n", virq); + + irq = (unsigned int)irq_map[virq].hwirq; + if (irq == XICS_IPI || irq == XICS_IRQ_SPURIOUS) + return; + xics_mask_real_irq(irq); +} + +static unsigned int xics_startup(unsigned int virq) +{ + unsigned int irq; + + /* force a reverse mapping of the interrupt so it gets in the cache */ + irq = (unsigned int)irq_map[virq].hwirq; + irq_radix_revmap(xics_host, irq); + + /* unmask it */ + xics_unmask_irq(virq); + return 0; } -static void xics_end_irq(unsigned int irq) +static void xics_eoi_direct(unsigned int virq) { int cpu = smp_processor_id(); + unsigned int irq = (unsigned int)irq_map[virq].hwirq; iosync(); - ops->xirr_info_set(cpu, ((0xff << 24) | - (virt_irq_to_real(irq_offset_down(irq))))); - + direct_xirr_info_set(cpu, (0xff << 24) | irq); } -static void xics_mask_and_ack_irq(unsigned int irq) + +static void xics_eoi_lpar(unsigned int virq) { int cpu = smp_processor_id(); + unsigned int irq = (unsigned int)irq_map[virq].hwirq; - if (irq < irq_offset_value()) { - i8259_pic.ack(irq); - iosync(); - ops->xirr_info_set(cpu, ((0xff<<24) | - xics_irq_8259_cascade_real)); - iosync(); - } + iosync(); + lpar_xirr_info_set(cpu, (0xff << 24) | irq); } -int xics_get_irq(struct pt_regs *regs) +static inline unsigned int xics_remap_irq(unsigned int vec) { - unsigned int cpu = smp_processor_id(); - unsigned int vec; - int irq; + unsigned int irq; - vec = ops->xirr_info_get(cpu); - /* (vec >> 24) == old priority */ vec &= 0x00ffffff; - /* for sanity, this had better be < NR_IRQS - 16 */ - if (vec == xics_irq_8259_cascade_real) { - irq = i8259_irq(regs); - xics_end_irq(irq_offset_up(xics_irq_8259_cascade)); - } else if (vec == XICS_IRQ_SPURIOUS) { - irq = -1; - } else { - irq = real_irq_to_virt(vec); - if (irq == NO_IRQ) - irq = real_irq_to_virt_slowpath(vec); - if (irq == NO_IRQ) { - printk(KERN_ERR "Interrupt %u (real) is invalid," - " disabling it.\n", vec); - xics_disable_real_irq(vec); - } else - irq = irq_offset_up(irq); - } - return irq; + if (vec == XICS_IRQ_SPURIOUS) + return NO_IRQ; + irq = irq_radix_revmap(xics_host, vec); + if (likely(irq != NO_IRQ)) + return irq; + + printk(KERN_ERR "Interrupt %u (real) is invalid," + " disabling it.\n", vec); + xics_mask_real_irq(vec); + return NO_IRQ; } -#ifdef CONFIG_SMP +static unsigned int xics_get_irq_direct(struct pt_regs *regs) +{ + unsigned int cpu = smp_processor_id(); -static irqreturn_t xics_ipi_action(int irq, void *dev_id, struct pt_regs *regs) + return xics_remap_irq(direct_xirr_info_get(cpu)); +} + +static unsigned int xics_get_irq_lpar(struct pt_regs *regs) { - int cpu = smp_processor_id(); + unsigned int cpu = smp_processor_id(); + + return xics_remap_irq(lpar_xirr_info_get(cpu)); +} - ops->qirr_info(cpu, 0xff); +#ifdef CONFIG_SMP +static irqreturn_t xics_ipi_dispatch(int cpu, struct pt_regs *regs) +{ WARN_ON(cpu_is_offline(cpu)); while (xics_ipi_message[cpu].value) { @@ -418,18 +377,88 @@ static irqreturn_t xics_ipi_action(int irq, void *dev_id, struct pt_regs *regs) return IRQ_HANDLED; } +static irqreturn_t xics_ipi_action_direct(int irq, void *dev_id, struct pt_regs *regs) +{ + int cpu = smp_processor_id(); + + direct_qirr_info(cpu, 0xff); + + return xics_ipi_dispatch(cpu, regs); +} + +static irqreturn_t xics_ipi_action_lpar(int irq, void *dev_id, struct pt_regs *regs) +{ + int cpu = smp_processor_id(); + + lpar_qirr_info(cpu, 0xff); + + return xics_ipi_dispatch(cpu, regs); +} + void xics_cause_IPI(int cpu) { - ops->qirr_info(cpu, IPI_PRIORITY); + if (firmware_has_feature(FW_FEATURE_LPAR)) + lpar_qirr_info(cpu, IPI_PRIORITY); + else + direct_qirr_info(cpu, IPI_PRIORITY); } + #endif /* CONFIG_SMP */ +static void xics_set_cpu_priority(int cpu, unsigned char cppr) +{ + if (firmware_has_feature(FW_FEATURE_LPAR)) + lpar_cppr_info(cpu, cppr); + else + direct_cppr_info(cpu, cppr); + iosync(); +} + +static void xics_set_affinity(unsigned int virq, cpumask_t cpumask) +{ + unsigned int irq; + int status; + int xics_status[2]; + unsigned long newmask; + cpumask_t tmp = CPU_MASK_NONE; + + irq = (unsigned int)irq_map[virq].hwirq; + if (irq == XICS_IPI || irq == XICS_IRQ_SPURIOUS) + return; + + status = rtas_call(ibm_get_xive, 1, 3, xics_status, irq); + + if (status) { + printk(KERN_ERR "xics_set_affinity: irq=%u ibm,get-xive " + "returns %d\n", irq, status); + return; + } + + /* For the moment only implement delivery to all cpus or one cpu */ + if (cpus_equal(cpumask, CPU_MASK_ALL)) { + newmask = default_distrib_server; + } else { + cpus_and(tmp, cpu_online_map, cpumask); + if (cpus_empty(tmp)) + return; + newmask = get_hard_smp_processor_id(first_cpu(tmp)); + } + + status = rtas_call(ibm_set_xive, 3, 1, NULL, + irq, newmask, xics_status[1]); + + if (status) { + printk(KERN_ERR "xics_set_affinity: irq=%u ibm,set-xive " + "returns %d\n", irq, status); + return; + } +} + void xics_setup_cpu(void) { int cpu = smp_processor_id(); - ops->cppr_info(cpu, 0xff); - iosync(); + xics_set_cpu_priority(cpu, 0xff); /* * Put the calling processor into the GIQ. This is really only @@ -442,72 +471,266 @@ void xics_setup_cpu(void) (1UL << interrupt_server_size) - 1 - default_distrib_server, 1); } -void xics_init_IRQ(void) + +static struct irq_chip xics_pic_direct = { + .typename = " XICS ", + .startup = xics_startup, + .mask = xics_mask_irq, + .unmask = xics_unmask_irq, + .eoi = xics_eoi_direct, + .set_affinity = xics_set_affinity +}; + + +static struct irq_chip xics_pic_lpar = { + .typename = " XICS ", + .startup = xics_startup, + .mask = xics_mask_irq, + .unmask = xics_unmask_irq, + .eoi = xics_eoi_lpar, + .set_affinity = xics_set_affinity +}; + + +static int xics_host_match(struct irq_host *h, struct device_node *node) +{ + /* IBM machines have interrupt parents of various funky types for things + * like vdevices, events, etc... The trick we use here is to match + * everything here except the legacy 8259 which is compatible "chrp,iic" + */ + return !device_is_compatible(node, "chrp,iic"); +} + +static int xics_host_map_direct(struct irq_host *h, unsigned int virq, + irq_hw_number_t hw, unsigned int flags) +{ + unsigned int sense = flags & IRQ_TYPE_SENSE_MASK; + + pr_debug("xics: map_direct virq %d, hwirq 0x%lx, flags: 0x%x\n", + virq, hw, flags); + + if (sense && sense != IRQ_TYPE_LEVEL_LOW) + printk(KERN_WARNING "xics: using unsupported sense 0x%x" + " for irq %d (h: 0x%lx)\n", flags, virq, hw); + + get_irq_desc(virq)->status |= IRQ_LEVEL; + set_irq_chip_and_handler(virq, &xics_pic_direct, handle_fasteoi_irq); + return 0; +} + +static int xics_host_map_lpar(struct irq_host *h, unsigned int virq, + irq_hw_number_t hw, unsigned int flags) +{ + unsigned int sense = flags & IRQ_TYPE_SENSE_MASK; + + pr_debug("xics: map_lpar virq %d, hwirq 0x%lx, flags: 0x%x\n", + virq, hw, flags); + + if (sense && sense != IRQ_TYPE_LEVEL_LOW) + printk(KERN_WARNING "xics: using unsupported sense 0x%x" + " for irq %d (h: 0x%lx)\n", flags, virq, hw); + + get_irq_desc(virq)->status |= IRQ_LEVEL; + set_irq_chip_and_handler(virq, &xics_pic_lpar, handle_fasteoi_irq); + return 0; +} + +static int xics_host_xlate(struct irq_host *h, struct device_node *ct, + u32 *intspec, unsigned int intsize, + irq_hw_number_t *out_hwirq, unsigned int *out_flags) + +{ + /* Current xics implementation translates everything + * to level. It is not technically right for MSIs but this + * is irrelevant at this point. We might get smarter in the future + */ + *out_hwirq = intspec[0]; + *out_flags = IRQ_TYPE_LEVEL_LOW; + + return 0; +} + +static struct irq_host_ops xics_host_direct_ops = { + .match = xics_host_match, + .map = xics_host_map_direct, + .xlate = xics_host_xlate, +}; + +static struct irq_host_ops xics_host_lpar_ops = { + .match = xics_host_match, + .map = xics_host_map_lpar, + .xlate = xics_host_xlate, +}; + +static void __init xics_init_host(void) +{ + struct irq_host_ops *ops; + + if (firmware_has_feature(FW_FEATURE_LPAR)) + ops = &xics_host_lpar_ops; + else + ops = &xics_host_direct_ops; + xics_host = irq_alloc_host(IRQ_HOST_MAP_TREE, 0, ops, + XICS_IRQ_SPURIOUS); + BUG_ON(xics_host == NULL); + irq_set_default_host(xics_host); +} + +static void __init xics_map_one_cpu(int hw_id, unsigned long addr, + unsigned long size) { +#ifdef CONFIG_SMP int i; - unsigned long intr_size = 0; - struct device_node *np; - uint *ireg, ilen, indx = 0; - unsigned long intr_base = 0; - struct xics_interrupt_node { - unsigned long addr; - unsigned long size; - } intnodes[NR_CPUS]; - ppc64_boot_msg(0x20, "XICS Init"); + /* This may look gross but it's good enough for now, we don't quite + * have a hard -> linux processor id matching. + */ + for_each_possible_cpu(i) { + if (!cpu_present(i)) + continue; + if (hw_id == get_hard_smp_processor_id(i)) { + xics_per_cpu[i] = ioremap(addr, size); + return; + } + } +#else + if (hw_id != 0) + return; + xics_per_cpu[0] = ioremap(addr, size); +#endif /* CONFIG_SMP */ +} - ibm_get_xive = rtas_token("ibm,get-xive"); - ibm_set_xive = rtas_token("ibm,set-xive"); - ibm_int_on = rtas_token("ibm,int-on"); - ibm_int_off = rtas_token("ibm,int-off"); +static void __init xics_init_one_node(struct device_node *np, + unsigned int *indx) +{ + unsigned int ilen; + u32 *ireg; - np = of_find_node_by_type(NULL, "PowerPC-External-Interrupt-Presentation"); - if (!np) - panic("xics_init_IRQ: can't find interrupt presentation"); + /* This code does the theorically broken assumption that the interrupt + * server numbers are the same as the hard CPU numbers. + * This happens to be the case so far but we are playing with fire... + * should be fixed one of these days. -BenH. + */ + ireg = (u32 *)get_property(np, "ibm,interrupt-server-ranges", NULL); -nextnode: - ireg = (uint *)get_property(np, "ibm,interrupt-server-ranges", NULL); + /* Do that ever happen ? we'll know soon enough... but even good'old + * f80 does have that property .. + */ + WARN_ON(ireg == NULL); if (ireg) { /* * set node starting index for this node */ - indx = *ireg; + *indx = *ireg; } - - ireg = (uint *)get_property(np, "reg", &ilen); + ireg = (u32 *)get_property(np, "reg", &ilen); if (!ireg) panic("xics_init_IRQ: can't find interrupt reg property"); - while (ilen) { - intnodes[indx].addr = (unsigned long)*ireg++ << 32; - ilen -= sizeof(uint); - intnodes[indx].addr |= *ireg++; - ilen -= sizeof(uint); - intnodes[indx].size = (unsigned long)*ireg++ << 32; - ilen -= sizeof(uint); - intnodes[indx].size |= *ireg++; - ilen -= sizeof(uint); - indx++; - if (indx >= NR_CPUS) break; + while (ilen >= (4 * sizeof(u32))) { + unsigned long addr, size; + + /* XXX Use proper OF parsing code here !!! */ + addr = (unsigned long)*ireg++ << 32; + ilen -= sizeof(u32); + addr |= *ireg++; + ilen -= sizeof(u32); + size = (unsigned long)*ireg++ << 32; + ilen -= sizeof(u32); + size |= *ireg++; + ilen -= sizeof(u32); + xics_map_one_cpu(*indx, addr, size); + (*indx)++; + } +} + + +static void __init xics_setup_8259_cascade(void) +{ + struct device_node *np, *old, *found = NULL; + int cascade, naddr; + u32 *addrp; + unsigned long intack = 0; + + for_each_node_by_type(np, "interrupt-controller") + if (device_is_compatible(np, "chrp,iic")) { + found = np; + break; + } + if (found == NULL) { + printk(KERN_DEBUG "xics: no ISA interrupt controller\n"); + return; + } + cascade = irq_of_parse_and_map(found, 0); + if (cascade == NO_IRQ) { + printk(KERN_ERR "xics: failed to map cascade interrupt"); + return; + } + pr_debug("xics: cascade mapped to irq %d\n", cascade); + + for (old = of_node_get(found); old != NULL ; old = np) { + np = of_get_parent(old); + of_node_put(old); + if (np == NULL) + break; + if (strcmp(np->name, "pci") != 0) + continue; + addrp = (u32 *)get_property(np, "8259-interrupt-acknowledge", NULL); + if (addrp == NULL) + continue; + naddr = prom_n_addr_cells(np); + intack = addrp[naddr-1]; + if (naddr > 1) + intack |= ((unsigned long)addrp[naddr-2]) << 32; + } + if (intack) + printk(KERN_DEBUG "xics: PCI 8259 intack at 0x%016lx\n", intack); + i8259_init(found, intack); + of_node_put(found); + set_irq_chained_handler(cascade, pseries_8259_cascade); +} + +void __init xics_init_IRQ(void) +{ + int i; + struct device_node *np; + u32 *ireg, ilen, indx = 0; + int found = 0; + + ppc64_boot_msg(0x20, "XICS Init"); + + ibm_get_xive = rtas_token("ibm,get-xive"); + ibm_set_xive = rtas_token("ibm,set-xive"); + ibm_int_on = rtas_token("ibm,int-on"); + ibm_int_off = rtas_token("ibm,int-off"); + + for_each_node_by_type(np, "PowerPC-External-Interrupt-Presentation") { + found = 1; + if (firmware_has_feature(FW_FEATURE_LPAR)) + break; + xics_init_one_node(np, &indx); } + if (found == 0) + return; - np = of_find_node_by_type(np, "PowerPC-External-Interrupt-Presentation"); - if ((indx < NR_CPUS) && np) goto nextnode; + xics_init_host(); /* Find the server numbers for the boot cpu. */ for (np = of_find_node_by_type(NULL, "cpu"); np; np = of_find_node_by_type(np, "cpu")) { - ireg = (uint *)get_property(np, "reg", &ilen); + ireg = (u32 *)get_property(np, "reg", &ilen); if (ireg && ireg[0] == get_hard_smp_processor_id(boot_cpuid)) { - ireg = (uint *)get_property(np, "ibm,ppc-interrupt-gserver#s", - &ilen); + ireg = (u32 *)get_property(np, + "ibm,ppc-interrupt-gserver#s", + &ilen); i = ilen / sizeof(int); if (ireg && i > 0) { default_server = ireg[0]; - default_distrib_server = ireg[i-1]; /* take last element */ + /* take last element */ + default_distrib_server = ireg[i-1]; } - ireg = (uint *)get_property(np, + ireg = (u32 *)get_property(np, "ibm,interrupt-server#-size", NULL); if (ireg) interrupt_server_size = *ireg; @@ -516,135 +739,48 @@ nextnode: } of_node_put(np); - intr_base = intnodes[0].addr; - intr_size = intnodes[0].size; - - np = of_find_node_by_type(NULL, "interrupt-controller"); - if (!np) { - printk(KERN_DEBUG "xics: no ISA interrupt controller\n"); - xics_irq_8259_cascade_real = -1; - xics_irq_8259_cascade = -1; - } else { - ireg = (uint *) get_property(np, "interrupts", NULL); - if (!ireg) - panic("xics_init_IRQ: can't find ISA interrupts property"); - - xics_irq_8259_cascade_real = *ireg; - xics_irq_8259_cascade - = virt_irq_create_mapping(xics_irq_8259_cascade_real); - i8259_init(0, 0); - of_node_put(np); - } - if (firmware_has_feature(FW_FEATURE_LPAR)) - ops = &pSeriesLP_ops; - else { -#ifdef CONFIG_SMP - for_each_possible_cpu(i) { - int hard_id; - - /* FIXME: Do this dynamically! --RR */ - if (!cpu_present(i)) - continue; - - hard_id = get_hard_smp_processor_id(i); - xics_per_cpu[i] = ioremap(intnodes[hard_id].addr, - intnodes[hard_id].size); - } -#else - xics_per_cpu[0] = ioremap(intr_base, intr_size); -#endif /* CONFIG_SMP */ - } - - for (i = irq_offset_value(); i < NR_IRQS; ++i) - get_irq_desc(i)->chip = &xics_pic; + ppc_md.get_irq = xics_get_irq_lpar; + else + ppc_md.get_irq = xics_get_irq_direct; xics_setup_cpu(); + xics_setup_8259_cascade(); + ppc64_boot_msg(0x21, "XICS Done"); } -/* - * We cant do this in init_IRQ because we need the memory subsystem up for - * request_irq() - */ -static int __init xics_setup_i8259(void) -{ - if (ppc64_interrupt_controller == IC_PPC_XIC && - xics_irq_8259_cascade != -1) { - if (request_irq(irq_offset_up(xics_irq_8259_cascade), - no_action, 0, "8259 cascade", NULL)) - printk(KERN_ERR "xics_setup_i8259: couldn't get 8259 " - "cascade\n"); - } - return 0; -} -arch_initcall(xics_setup_i8259); #ifdef CONFIG_SMP void xics_request_IPIs(void) { - virt_irq_to_real_map[XICS_IPI] = XICS_IPI; + unsigned int ipi; + + ipi = irq_create_mapping(xics_host, XICS_IPI, 0); + BUG_ON(ipi == NO_IRQ); /* * IPIs are marked IRQF_DISABLED as they must run with irqs * disabled */ - request_irq(irq_offset_up(XICS_IPI), xics_ipi_action, - IRQF_DISABLED, "IPI", NULL); - get_irq_desc(irq_offset_up(XICS_IPI))->status |= IRQ_PER_CPU; -} -#endif - -static void xics_set_affinity(unsigned int virq, cpumask_t cpumask) -{ - unsigned int irq; - int status; - int xics_status[2]; - unsigned long newmask; - cpumask_t tmp = CPU_MASK_NONE; - - irq = virt_irq_to_real(irq_offset_down(virq)); - if (irq == XICS_IPI || irq == NO_IRQ) - return; - - status = rtas_call(ibm_get_xive, 1, 3, xics_status, irq); - - if (status) { - printk(KERN_ERR "xics_set_affinity: irq=%u ibm,get-xive " - "returns %d\n", irq, status); - return; - } - - /* For the moment only implement delivery to all cpus or one cpu */ - if (cpus_equal(cpumask, CPU_MASK_ALL)) { - newmask = default_distrib_server; - } else { - cpus_and(tmp, cpu_online_map, cpumask); - if (cpus_empty(tmp)) - return; - newmask = get_hard_smp_processor_id(first_cpu(tmp)); - } - - status = rtas_call(ibm_set_xive, 3, 1, NULL, - irq, newmask, xics_status[1]); - - if (status) { - printk(KERN_ERR "xics_set_affinity: irq=%u ibm,set-xive " - "returns %d\n", irq, status); - return; - } + set_irq_handler(ipi, handle_percpu_irq); + if (firmware_has_feature(FW_FEATURE_LPAR)) + request_irq(ipi, xics_ipi_action_lpar, IRQF_DISABLED, + "IPI", NULL); + else + request_irq(ipi, xics_ipi_action_direct, IRQF_DISABLED, + "IPI", NULL); } +#endif /* CONFIG_SMP */ void xics_teardown_cpu(int secondary) { int cpu = smp_processor_id(); + unsigned int ipi; + struct irq_desc *desc; - ops->cppr_info(cpu, 0x00); - iosync(); - - /* Clear IPI */ - ops->qirr_info(cpu, 0xff); + xics_set_cpu_priority(cpu, 0); /* * we need to EOI the IPI if we got here from kexec down IPI @@ -653,7 +789,13 @@ void xics_teardown_cpu(int secondary) * should we be flagging idle loop instead? * or creating some task to be scheduled? */ - ops->xirr_info_set(cpu, XICS_IPI); + + ipi = irq_find_mapping(xics_host, XICS_IPI); + if (ipi == XICS_IRQ_SPURIOUS) + return; + desc = get_irq_desc(ipi); + if (desc->chip && desc->chip->eoi) + desc->chip->eoi(XICS_IPI); /* * Some machines need to have at least one cpu in the GIQ, @@ -661,8 +803,8 @@ void xics_teardown_cpu(int secondary) */ if (secondary) rtas_set_indicator(GLOBAL_INTERRUPT_QUEUE, - (1UL << interrupt_server_size) - 1 - - default_distrib_server, 0); + (1UL << interrupt_server_size) - 1 - + default_distrib_server, 0); } #ifdef CONFIG_HOTPLUG_CPU @@ -674,8 +816,7 @@ void xics_migrate_irqs_away(void) unsigned int irq, virq, cpu = smp_processor_id(); /* Reject any interrupt that was queued to us... */ - ops->cppr_info(cpu, 0); - iosync(); + xics_set_cpu_priority(cpu, 0); /* remove ourselves from the global interrupt queue */ status = rtas_set_indicator(GLOBAL_INTERRUPT_QUEUE, @@ -683,24 +824,23 @@ void xics_migrate_irqs_away(void) WARN_ON(status < 0); /* Allow IPIs again... */ - ops->cppr_info(cpu, DEFAULT_PRIORITY); - iosync(); + xics_set_cpu_priority(cpu, DEFAULT_PRIORITY); for_each_irq(virq) { - irq_desc_t *desc; + struct irq_desc *desc; int xics_status[2]; unsigned long flags; /* We cant set affinity on ISA interrupts */ - if (virq < irq_offset_value()) + if (virq < NUM_ISA_INTERRUPTS) continue; - - desc = get_irq_desc(virq); - irq = virt_irq_to_real(irq_offset_down(virq)); - + if (irq_map[virq].host != xics_host) + continue; + irq = (unsigned int)irq_map[virq].hwirq; /* We need to get IPIs still. */ - if (irq == XICS_IPI || irq == NO_IRQ) + if (irq == XICS_IPI || irq == XICS_IRQ_SPURIOUS) continue; + desc = get_irq_desc(virq); /* We only need to migrate enabled IRQS */ if (desc == NULL || desc->chip == NULL diff --git a/arch/powerpc/platforms/pseries/xics.h b/arch/powerpc/platforms/pseries/xics.h index e14c70868f1..6ee1055b0ff 100644 --- a/arch/powerpc/platforms/pseries/xics.h +++ b/arch/powerpc/platforms/pseries/xics.h @@ -14,13 +14,12 @@ #include <linux/cache.h> -void xics_init_IRQ(void); -int xics_get_irq(struct pt_regs *); -void xics_setup_cpu(void); -void xics_teardown_cpu(int secondary); -void xics_cause_IPI(int cpu); -void xics_request_IPIs(void); -void xics_migrate_irqs_away(void); +extern void xics_init_IRQ(void); +extern void xics_setup_cpu(void); +extern void xics_teardown_cpu(int secondary); +extern void xics_cause_IPI(int cpu); +extern void xics_request_IPIs(void); +extern void xics_migrate_irqs_away(void); /* first argument is ignored for now*/ void pSeriesLP_cppr_info(int n_cpu, u8 value); @@ -31,4 +30,8 @@ struct xics_ipi_struct { extern struct xics_ipi_struct xics_ipi_message[NR_CPUS] __cacheline_aligned; +struct irq_desc; +extern void pseries_8259_cascade(unsigned int irq, struct irq_desc *desc, + struct pt_regs *regs); + #endif /* _POWERPC_KERNEL_XICS_H */ |