Benjamin Herrenschmidt | 0b05ac6 | 2011-04-04 13:46:58 +1000 | [diff] [blame] | 1 | /* |
| 2 | * Common definitions accross all variants of ICP and ICS interrupt |
| 3 | * controllers. |
| 4 | */ |
| 5 | |
| 6 | #ifndef _XICS_H |
| 7 | #define _XICS_H |
| 8 | |
Michael Ellerman | cd85257 | 2011-04-14 22:31:58 +0000 | [diff] [blame] | 9 | #include <linux/interrupt.h> |
| 10 | |
Benjamin Herrenschmidt | 0b05ac6 | 2011-04-04 13:46:58 +1000 | [diff] [blame] | 11 | #define XICS_IPI 2 |
| 12 | #define XICS_IRQ_SPURIOUS 0 |
| 13 | |
| 14 | /* Want a priority other than 0. Various HW issues require this. */ |
| 15 | #define DEFAULT_PRIORITY 5 |
| 16 | |
| 17 | /* |
Yong Zhang | a3a9f3b | 2011-10-21 23:56:27 +0000 | [diff] [blame] | 18 | * Mark IPIs as higher priority so we can take them inside interrupts |
| 19 | * FIXME: still true now? |
Benjamin Herrenschmidt | 0b05ac6 | 2011-04-04 13:46:58 +1000 | [diff] [blame] | 20 | */ |
| 21 | #define IPI_PRIORITY 4 |
| 22 | |
| 23 | /* The least favored priority */ |
| 24 | #define LOWEST_PRIORITY 0xFF |
| 25 | |
| 26 | /* The number of priorities defined above */ |
| 27 | #define MAX_NUM_PRIORITIES 3 |
| 28 | |
| 29 | /* Native ICP */ |
Benjamin Herrenschmidt | 5c7c1e9 | 2011-09-19 17:45:02 +0000 | [diff] [blame] | 30 | #ifdef CONFIG_PPC_ICP_NATIVE |
Benjamin Herrenschmidt | 0b05ac6 | 2011-04-04 13:46:58 +1000 | [diff] [blame] | 31 | extern int icp_native_init(void); |
Benjamin Herrenschmidt | 5c7c1e9 | 2011-09-19 17:45:02 +0000 | [diff] [blame] | 32 | #else |
| 33 | static inline int icp_native_init(void) { return -ENODEV; } |
| 34 | #endif |
Benjamin Herrenschmidt | 0b05ac6 | 2011-04-04 13:46:58 +1000 | [diff] [blame] | 35 | |
| 36 | /* PAPR ICP */ |
Benjamin Herrenschmidt | 5c7c1e9 | 2011-09-19 17:45:02 +0000 | [diff] [blame] | 37 | #ifdef CONFIG_PPC_ICP_HV |
Benjamin Herrenschmidt | 0b05ac6 | 2011-04-04 13:46:58 +1000 | [diff] [blame] | 38 | extern int icp_hv_init(void); |
Benjamin Herrenschmidt | 5c7c1e9 | 2011-09-19 17:45:02 +0000 | [diff] [blame] | 39 | #else |
| 40 | static inline int icp_hv_init(void) { return -ENODEV; } |
| 41 | #endif |
Benjamin Herrenschmidt | 0b05ac6 | 2011-04-04 13:46:58 +1000 | [diff] [blame] | 42 | |
| 43 | /* ICP ops */ |
| 44 | struct icp_ops { |
| 45 | unsigned int (*get_irq)(void); |
| 46 | void (*eoi)(struct irq_data *d); |
| 47 | void (*set_priority)(unsigned char prio); |
| 48 | void (*teardown_cpu)(void); |
| 49 | void (*flush_ipi)(void); |
| 50 | #ifdef CONFIG_SMP |
Milton Miller | 23d72bf | 2011-05-10 19:29:39 +0000 | [diff] [blame] | 51 | void (*cause_ipi)(int cpu, unsigned long data); |
Benjamin Herrenschmidt | 0b05ac6 | 2011-04-04 13:46:58 +1000 | [diff] [blame] | 52 | irq_handler_t ipi_action; |
| 53 | #endif |
| 54 | }; |
| 55 | |
| 56 | extern const struct icp_ops *icp_ops; |
| 57 | |
| 58 | /* Native ICS */ |
| 59 | extern int ics_native_init(void); |
| 60 | |
| 61 | /* RTAS ICS */ |
Benjamin Herrenschmidt | 5c7c1e9 | 2011-09-19 17:45:02 +0000 | [diff] [blame] | 62 | #ifdef CONFIG_PPC_ICS_RTAS |
Benjamin Herrenschmidt | 0b05ac6 | 2011-04-04 13:46:58 +1000 | [diff] [blame] | 63 | extern int ics_rtas_init(void); |
Benjamin Herrenschmidt | 5c7c1e9 | 2011-09-19 17:45:02 +0000 | [diff] [blame] | 64 | #else |
| 65 | static inline int ics_rtas_init(void) { return -ENODEV; } |
| 66 | #endif |
| 67 | |
| 68 | /* HAL ICS */ |
| 69 | #ifdef CONFIG_PPC_POWERNV |
| 70 | extern int ics_opal_init(void); |
| 71 | #else |
| 72 | static inline int ics_opal_init(void) { return -ENODEV; } |
| 73 | #endif |
Benjamin Herrenschmidt | 0b05ac6 | 2011-04-04 13:46:58 +1000 | [diff] [blame] | 74 | |
| 75 | /* ICS instance, hooked up to chip_data of an irq */ |
| 76 | struct ics { |
| 77 | struct list_head link; |
| 78 | int (*map)(struct ics *ics, unsigned int virq); |
| 79 | void (*mask_unknown)(struct ics *ics, unsigned long vec); |
| 80 | long (*get_server)(struct ics *ics, unsigned long vec); |
Michael Ellerman | 5ca1237 | 2011-04-14 22:31:59 +0000 | [diff] [blame] | 81 | int (*host_match)(struct ics *ics, struct device_node *node); |
Benjamin Herrenschmidt | 0b05ac6 | 2011-04-04 13:46:58 +1000 | [diff] [blame] | 82 | char data[]; |
| 83 | }; |
| 84 | |
| 85 | /* Commons */ |
| 86 | extern unsigned int xics_default_server; |
| 87 | extern unsigned int xics_default_distrib_server; |
| 88 | extern unsigned int xics_interrupt_server_size; |
Grant Likely | bae1d8f | 2012-02-14 14:06:50 -0700 | [diff] [blame] | 89 | extern struct irq_domain *xics_host; |
Benjamin Herrenschmidt | 0b05ac6 | 2011-04-04 13:46:58 +1000 | [diff] [blame] | 90 | |
| 91 | struct xics_cppr { |
| 92 | unsigned char stack[MAX_NUM_PRIORITIES]; |
| 93 | int index; |
| 94 | }; |
| 95 | |
| 96 | DECLARE_PER_CPU(struct xics_cppr, xics_cppr); |
| 97 | |
| 98 | static inline void xics_push_cppr(unsigned int vec) |
| 99 | { |
| 100 | struct xics_cppr *os_cppr = &__get_cpu_var(xics_cppr); |
| 101 | |
| 102 | if (WARN_ON(os_cppr->index >= MAX_NUM_PRIORITIES - 1)) |
| 103 | return; |
| 104 | |
| 105 | if (vec == XICS_IPI) |
| 106 | os_cppr->stack[++os_cppr->index] = IPI_PRIORITY; |
| 107 | else |
| 108 | os_cppr->stack[++os_cppr->index] = DEFAULT_PRIORITY; |
| 109 | } |
| 110 | |
| 111 | static inline unsigned char xics_pop_cppr(void) |
| 112 | { |
| 113 | struct xics_cppr *os_cppr = &__get_cpu_var(xics_cppr); |
| 114 | |
| 115 | if (WARN_ON(os_cppr->index < 1)) |
| 116 | return LOWEST_PRIORITY; |
| 117 | |
| 118 | return os_cppr->stack[--os_cppr->index]; |
| 119 | } |
| 120 | |
| 121 | static inline void xics_set_base_cppr(unsigned char cppr) |
| 122 | { |
| 123 | struct xics_cppr *os_cppr = &__get_cpu_var(xics_cppr); |
| 124 | |
| 125 | /* we only really want to set the priority when there's |
| 126 | * just one cppr value on the stack |
| 127 | */ |
| 128 | WARN_ON(os_cppr->index != 0); |
| 129 | |
| 130 | os_cppr->stack[0] = cppr; |
| 131 | } |
| 132 | |
| 133 | static inline unsigned char xics_cppr_top(void) |
| 134 | { |
| 135 | struct xics_cppr *os_cppr = &__get_cpu_var(xics_cppr); |
| 136 | |
| 137 | return os_cppr->stack[os_cppr->index]; |
| 138 | } |
| 139 | |
| 140 | DECLARE_PER_CPU_SHARED_ALIGNED(unsigned long, xics_ipi_message); |
| 141 | |
| 142 | extern void xics_init(void); |
| 143 | extern void xics_setup_cpu(void); |
| 144 | extern void xics_update_irq_servers(void); |
| 145 | extern void xics_set_cpu_giq(unsigned int gserver, unsigned int join); |
| 146 | extern void xics_mask_unknown_vec(unsigned int vec); |
| 147 | extern irqreturn_t xics_ipi_dispatch(int cpu); |
| 148 | extern int xics_smp_probe(void); |
| 149 | extern void xics_register_ics(struct ics *ics); |
| 150 | extern void xics_teardown_cpu(void); |
| 151 | extern void xics_kexec_teardown_cpu(int secondary); |
| 152 | extern void xics_migrate_irqs_away(void); |
Gavin Shan | 137436c | 2013-04-25 19:20:59 +0000 | [diff] [blame] | 153 | extern void icp_native_eoi(struct irq_data *d); |
Benjamin Herrenschmidt | 0b05ac6 | 2011-04-04 13:46:58 +1000 | [diff] [blame] | 154 | #ifdef CONFIG_SMP |
| 155 | extern int xics_get_irq_server(unsigned int virq, const struct cpumask *cpumask, |
| 156 | unsigned int strict_check); |
| 157 | #else |
| 158 | #define xics_get_irq_server(virq, cpumask, strict_check) (xics_default_server) |
| 159 | #endif |
| 160 | |
| 161 | |
| 162 | #endif /* _XICS_H */ |