10b05ac6eSBenjamin Herrenschmidt /* 20b05ac6eSBenjamin Herrenschmidt * Common definitions accross all variants of ICP and ICS interrupt 30b05ac6eSBenjamin Herrenschmidt * controllers. 40b05ac6eSBenjamin Herrenschmidt */ 50b05ac6eSBenjamin Herrenschmidt 60b05ac6eSBenjamin Herrenschmidt #ifndef _XICS_H 70b05ac6eSBenjamin Herrenschmidt #define _XICS_H 80b05ac6eSBenjamin Herrenschmidt 9cd852579SMichael Ellerman #include <linux/interrupt.h> 10cd852579SMichael Ellerman 110b05ac6eSBenjamin Herrenschmidt #define XICS_IPI 2 120b05ac6eSBenjamin Herrenschmidt #define XICS_IRQ_SPURIOUS 0 130b05ac6eSBenjamin Herrenschmidt 140b05ac6eSBenjamin Herrenschmidt /* Want a priority other than 0. Various HW issues require this. */ 150b05ac6eSBenjamin Herrenschmidt #define DEFAULT_PRIORITY 5 160b05ac6eSBenjamin Herrenschmidt 170b05ac6eSBenjamin Herrenschmidt /* 18a3a9f3b4SYong Zhang * Mark IPIs as higher priority so we can take them inside interrupts 19a3a9f3b4SYong Zhang * FIXME: still true now? 200b05ac6eSBenjamin Herrenschmidt */ 210b05ac6eSBenjamin Herrenschmidt #define IPI_PRIORITY 4 220b05ac6eSBenjamin Herrenschmidt 230b05ac6eSBenjamin Herrenschmidt /* The least favored priority */ 240b05ac6eSBenjamin Herrenschmidt #define LOWEST_PRIORITY 0xFF 250b05ac6eSBenjamin Herrenschmidt 260b05ac6eSBenjamin Herrenschmidt /* The number of priorities defined above */ 270b05ac6eSBenjamin Herrenschmidt #define MAX_NUM_PRIORITIES 3 280b05ac6eSBenjamin Herrenschmidt 290b05ac6eSBenjamin Herrenschmidt /* Native ICP */ 305c7c1e94SBenjamin Herrenschmidt #ifdef CONFIG_PPC_ICP_NATIVE 310b05ac6eSBenjamin Herrenschmidt extern int icp_native_init(void); 32d6a4f709SPaul Mackerras extern void icp_native_flush_interrupt(void); 33*ec13e9b6SSuresh Warrier extern void icp_native_cause_ipi_rm(int cpu); 345c7c1e94SBenjamin Herrenschmidt #else 355c7c1e94SBenjamin Herrenschmidt static inline int icp_native_init(void) { return -ENODEV; } 365c7c1e94SBenjamin Herrenschmidt #endif 370b05ac6eSBenjamin Herrenschmidt 380b05ac6eSBenjamin Herrenschmidt /* PAPR ICP */ 395c7c1e94SBenjamin Herrenschmidt #ifdef CONFIG_PPC_ICP_HV 400b05ac6eSBenjamin Herrenschmidt extern int icp_hv_init(void); 415c7c1e94SBenjamin Herrenschmidt #else 425c7c1e94SBenjamin Herrenschmidt static inline int icp_hv_init(void) { return -ENODEV; } 435c7c1e94SBenjamin Herrenschmidt #endif 440b05ac6eSBenjamin Herrenschmidt 450b05ac6eSBenjamin Herrenschmidt /* ICP ops */ 460b05ac6eSBenjamin Herrenschmidt struct icp_ops { 470b05ac6eSBenjamin Herrenschmidt unsigned int (*get_irq)(void); 480b05ac6eSBenjamin Herrenschmidt void (*eoi)(struct irq_data *d); 490b05ac6eSBenjamin Herrenschmidt void (*set_priority)(unsigned char prio); 500b05ac6eSBenjamin Herrenschmidt void (*teardown_cpu)(void); 510b05ac6eSBenjamin Herrenschmidt void (*flush_ipi)(void); 520b05ac6eSBenjamin Herrenschmidt #ifdef CONFIG_SMP 5323d72bfdSMilton Miller void (*cause_ipi)(int cpu, unsigned long data); 540b05ac6eSBenjamin Herrenschmidt irq_handler_t ipi_action; 550b05ac6eSBenjamin Herrenschmidt #endif 560b05ac6eSBenjamin Herrenschmidt }; 570b05ac6eSBenjamin Herrenschmidt 580b05ac6eSBenjamin Herrenschmidt extern const struct icp_ops *icp_ops; 590b05ac6eSBenjamin Herrenschmidt 600b05ac6eSBenjamin Herrenschmidt /* Native ICS */ 610b05ac6eSBenjamin Herrenschmidt extern int ics_native_init(void); 620b05ac6eSBenjamin Herrenschmidt 630b05ac6eSBenjamin Herrenschmidt /* RTAS ICS */ 645c7c1e94SBenjamin Herrenschmidt #ifdef CONFIG_PPC_ICS_RTAS 650b05ac6eSBenjamin Herrenschmidt extern int ics_rtas_init(void); 665c7c1e94SBenjamin Herrenschmidt #else 675c7c1e94SBenjamin Herrenschmidt static inline int ics_rtas_init(void) { return -ENODEV; } 685c7c1e94SBenjamin Herrenschmidt #endif 695c7c1e94SBenjamin Herrenschmidt 705c7c1e94SBenjamin Herrenschmidt /* HAL ICS */ 715c7c1e94SBenjamin Herrenschmidt #ifdef CONFIG_PPC_POWERNV 725c7c1e94SBenjamin Herrenschmidt extern int ics_opal_init(void); 735c7c1e94SBenjamin Herrenschmidt #else 745c7c1e94SBenjamin Herrenschmidt static inline int ics_opal_init(void) { return -ENODEV; } 755c7c1e94SBenjamin Herrenschmidt #endif 760b05ac6eSBenjamin Herrenschmidt 770b05ac6eSBenjamin Herrenschmidt /* ICS instance, hooked up to chip_data of an irq */ 780b05ac6eSBenjamin Herrenschmidt struct ics { 790b05ac6eSBenjamin Herrenschmidt struct list_head link; 800b05ac6eSBenjamin Herrenschmidt int (*map)(struct ics *ics, unsigned int virq); 810b05ac6eSBenjamin Herrenschmidt void (*mask_unknown)(struct ics *ics, unsigned long vec); 820b05ac6eSBenjamin Herrenschmidt long (*get_server)(struct ics *ics, unsigned long vec); 835ca12376SMichael Ellerman int (*host_match)(struct ics *ics, struct device_node *node); 840b05ac6eSBenjamin Herrenschmidt char data[]; 850b05ac6eSBenjamin Herrenschmidt }; 860b05ac6eSBenjamin Herrenschmidt 870b05ac6eSBenjamin Herrenschmidt /* Commons */ 880b05ac6eSBenjamin Herrenschmidt extern unsigned int xics_default_server; 890b05ac6eSBenjamin Herrenschmidt extern unsigned int xics_default_distrib_server; 900b05ac6eSBenjamin Herrenschmidt extern unsigned int xics_interrupt_server_size; 91bae1d8f1SGrant Likely extern struct irq_domain *xics_host; 920b05ac6eSBenjamin Herrenschmidt 930b05ac6eSBenjamin Herrenschmidt struct xics_cppr { 940b05ac6eSBenjamin Herrenschmidt unsigned char stack[MAX_NUM_PRIORITIES]; 950b05ac6eSBenjamin Herrenschmidt int index; 960b05ac6eSBenjamin Herrenschmidt }; 970b05ac6eSBenjamin Herrenschmidt 980b05ac6eSBenjamin Herrenschmidt DECLARE_PER_CPU(struct xics_cppr, xics_cppr); 990b05ac6eSBenjamin Herrenschmidt 1000b05ac6eSBenjamin Herrenschmidt static inline void xics_push_cppr(unsigned int vec) 1010b05ac6eSBenjamin Herrenschmidt { 10269111bacSChristoph Lameter struct xics_cppr *os_cppr = this_cpu_ptr(&xics_cppr); 1030b05ac6eSBenjamin Herrenschmidt 1040b05ac6eSBenjamin Herrenschmidt if (WARN_ON(os_cppr->index >= MAX_NUM_PRIORITIES - 1)) 1050b05ac6eSBenjamin Herrenschmidt return; 1060b05ac6eSBenjamin Herrenschmidt 1070b05ac6eSBenjamin Herrenschmidt if (vec == XICS_IPI) 1080b05ac6eSBenjamin Herrenschmidt os_cppr->stack[++os_cppr->index] = IPI_PRIORITY; 1090b05ac6eSBenjamin Herrenschmidt else 1100b05ac6eSBenjamin Herrenschmidt os_cppr->stack[++os_cppr->index] = DEFAULT_PRIORITY; 1110b05ac6eSBenjamin Herrenschmidt } 1120b05ac6eSBenjamin Herrenschmidt 1130b05ac6eSBenjamin Herrenschmidt static inline unsigned char xics_pop_cppr(void) 1140b05ac6eSBenjamin Herrenschmidt { 11569111bacSChristoph Lameter struct xics_cppr *os_cppr = this_cpu_ptr(&xics_cppr); 1160b05ac6eSBenjamin Herrenschmidt 1170b05ac6eSBenjamin Herrenschmidt if (WARN_ON(os_cppr->index < 1)) 1180b05ac6eSBenjamin Herrenschmidt return LOWEST_PRIORITY; 1190b05ac6eSBenjamin Herrenschmidt 1200b05ac6eSBenjamin Herrenschmidt return os_cppr->stack[--os_cppr->index]; 1210b05ac6eSBenjamin Herrenschmidt } 1220b05ac6eSBenjamin Herrenschmidt 1230b05ac6eSBenjamin Herrenschmidt static inline void xics_set_base_cppr(unsigned char cppr) 1240b05ac6eSBenjamin Herrenschmidt { 12569111bacSChristoph Lameter struct xics_cppr *os_cppr = this_cpu_ptr(&xics_cppr); 1260b05ac6eSBenjamin Herrenschmidt 1270b05ac6eSBenjamin Herrenschmidt /* we only really want to set the priority when there's 1280b05ac6eSBenjamin Herrenschmidt * just one cppr value on the stack 1290b05ac6eSBenjamin Herrenschmidt */ 1300b05ac6eSBenjamin Herrenschmidt WARN_ON(os_cppr->index != 0); 1310b05ac6eSBenjamin Herrenschmidt 1320b05ac6eSBenjamin Herrenschmidt os_cppr->stack[0] = cppr; 1330b05ac6eSBenjamin Herrenschmidt } 1340b05ac6eSBenjamin Herrenschmidt 1350b05ac6eSBenjamin Herrenschmidt static inline unsigned char xics_cppr_top(void) 1360b05ac6eSBenjamin Herrenschmidt { 13769111bacSChristoph Lameter struct xics_cppr *os_cppr = this_cpu_ptr(&xics_cppr); 1380b05ac6eSBenjamin Herrenschmidt 1390b05ac6eSBenjamin Herrenschmidt return os_cppr->stack[os_cppr->index]; 1400b05ac6eSBenjamin Herrenschmidt } 1410b05ac6eSBenjamin Herrenschmidt 1420b05ac6eSBenjamin Herrenschmidt DECLARE_PER_CPU_SHARED_ALIGNED(unsigned long, xics_ipi_message); 1430b05ac6eSBenjamin Herrenschmidt 1440b05ac6eSBenjamin Herrenschmidt extern void xics_init(void); 1450b05ac6eSBenjamin Herrenschmidt extern void xics_setup_cpu(void); 1460b05ac6eSBenjamin Herrenschmidt extern void xics_update_irq_servers(void); 1470b05ac6eSBenjamin Herrenschmidt extern void xics_set_cpu_giq(unsigned int gserver, unsigned int join); 1480b05ac6eSBenjamin Herrenschmidt extern void xics_mask_unknown_vec(unsigned int vec); 1490b05ac6eSBenjamin Herrenschmidt extern irqreturn_t xics_ipi_dispatch(int cpu); 150a7f4ee1fSMichael Ellerman extern void xics_smp_probe(void); 1510b05ac6eSBenjamin Herrenschmidt extern void xics_register_ics(struct ics *ics); 1520b05ac6eSBenjamin Herrenschmidt extern void xics_teardown_cpu(void); 1530b05ac6eSBenjamin Herrenschmidt extern void xics_kexec_teardown_cpu(int secondary); 1540b05ac6eSBenjamin Herrenschmidt extern void xics_migrate_irqs_away(void); 155137436c9SGavin Shan extern void icp_native_eoi(struct irq_data *d); 1560b05ac6eSBenjamin Herrenschmidt #ifdef CONFIG_SMP 1570b05ac6eSBenjamin Herrenschmidt extern int xics_get_irq_server(unsigned int virq, const struct cpumask *cpumask, 1580b05ac6eSBenjamin Herrenschmidt unsigned int strict_check); 1590b05ac6eSBenjamin Herrenschmidt #else 1600b05ac6eSBenjamin Herrenschmidt #define xics_get_irq_server(virq, cpumask, strict_check) (xics_default_server) 1610b05ac6eSBenjamin Herrenschmidt #endif 1620b05ac6eSBenjamin Herrenschmidt 1630b05ac6eSBenjamin Herrenschmidt 1640b05ac6eSBenjamin Herrenschmidt #endif /* _XICS_H */ 165