mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-03 17:40:04 +00:00
![Nick Child](/assets/img/avatar_default.png)
Some files functions in 'arch/powerpc/sysdev' are deserving of an `__init` macro attribute. These functions are only called by other initialization functions and therefore should inherit the attribute. Also, change function declarations in header files to include `__init`. Signed-off-by: Nick Child <nick.child@ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211216220035.605465-6-nick.child@ibm.com
179 lines
4.4 KiB
C
179 lines
4.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Common definitions across all variants of ICP and ICS interrupt
|
|
* controllers.
|
|
*/
|
|
|
|
#ifndef _XICS_H
|
|
#define _XICS_H
|
|
|
|
#include <linux/interrupt.h>
|
|
|
|
#define XICS_IPI 2
|
|
#define XICS_IRQ_SPURIOUS 0
|
|
|
|
/* Want a priority other than 0. Various HW issues require this. */
|
|
#define DEFAULT_PRIORITY 5
|
|
|
|
/*
|
|
* Mark IPIs as higher priority so we can take them inside interrupts
|
|
* FIXME: still true now?
|
|
*/
|
|
#define IPI_PRIORITY 4
|
|
|
|
/* The least favored priority */
|
|
#define LOWEST_PRIORITY 0xFF
|
|
|
|
/* The number of priorities defined above */
|
|
#define MAX_NUM_PRIORITIES 3
|
|
|
|
/* Native ICP */
|
|
#ifdef CONFIG_PPC_ICP_NATIVE
|
|
extern int icp_native_init(void);
|
|
extern void icp_native_flush_interrupt(void);
|
|
extern void icp_native_cause_ipi_rm(int cpu);
|
|
#else
|
|
static inline int icp_native_init(void) { return -ENODEV; }
|
|
#endif
|
|
|
|
/* PAPR ICP */
|
|
#ifdef CONFIG_PPC_ICP_HV
|
|
int __init icp_hv_init(void);
|
|
#else
|
|
static inline int icp_hv_init(void) { return -ENODEV; }
|
|
#endif
|
|
|
|
#ifdef CONFIG_PPC_POWERNV
|
|
int __init icp_opal_init(void);
|
|
extern void icp_opal_flush_interrupt(void);
|
|
#else
|
|
static inline int icp_opal_init(void) { return -ENODEV; }
|
|
#endif
|
|
|
|
/* ICP ops */
|
|
struct icp_ops {
|
|
unsigned int (*get_irq)(void);
|
|
void (*eoi)(struct irq_data *d);
|
|
void (*set_priority)(unsigned char prio);
|
|
void (*teardown_cpu)(void);
|
|
void (*flush_ipi)(void);
|
|
#ifdef CONFIG_SMP
|
|
void (*cause_ipi)(int cpu);
|
|
irq_handler_t ipi_action;
|
|
#endif
|
|
};
|
|
|
|
extern const struct icp_ops *icp_ops;
|
|
|
|
#ifdef CONFIG_PPC_ICS_NATIVE
|
|
/* Native ICS */
|
|
extern int ics_native_init(void);
|
|
#else
|
|
static inline int ics_native_init(void) { return -ENODEV; }
|
|
#endif
|
|
|
|
/* RTAS ICS */
|
|
#ifdef CONFIG_PPC_ICS_RTAS
|
|
extern int ics_rtas_init(void);
|
|
#else
|
|
static inline int ics_rtas_init(void) { return -ENODEV; }
|
|
#endif
|
|
|
|
/* HAL ICS */
|
|
#ifdef CONFIG_PPC_POWERNV
|
|
extern int ics_opal_init(void);
|
|
#else
|
|
static inline int ics_opal_init(void) { return -ENODEV; }
|
|
#endif
|
|
|
|
/* ICS instance, hooked up to chip_data of an irq */
|
|
struct ics {
|
|
struct list_head link;
|
|
int (*check)(struct ics *ics, unsigned int hwirq);
|
|
void (*mask_unknown)(struct ics *ics, unsigned long vec);
|
|
long (*get_server)(struct ics *ics, unsigned long vec);
|
|
int (*host_match)(struct ics *ics, struct device_node *node);
|
|
struct irq_chip *chip;
|
|
char data[];
|
|
};
|
|
|
|
/* Commons */
|
|
extern unsigned int xics_default_server;
|
|
extern unsigned int xics_default_distrib_server;
|
|
extern unsigned int xics_interrupt_server_size;
|
|
extern struct irq_domain *xics_host;
|
|
|
|
struct xics_cppr {
|
|
unsigned char stack[MAX_NUM_PRIORITIES];
|
|
int index;
|
|
};
|
|
|
|
DECLARE_PER_CPU(struct xics_cppr, xics_cppr);
|
|
|
|
static inline void xics_push_cppr(unsigned int vec)
|
|
{
|
|
struct xics_cppr *os_cppr = this_cpu_ptr(&xics_cppr);
|
|
|
|
if (WARN_ON(os_cppr->index >= MAX_NUM_PRIORITIES - 1))
|
|
return;
|
|
|
|
if (vec == XICS_IPI)
|
|
os_cppr->stack[++os_cppr->index] = IPI_PRIORITY;
|
|
else
|
|
os_cppr->stack[++os_cppr->index] = DEFAULT_PRIORITY;
|
|
}
|
|
|
|
static inline unsigned char xics_pop_cppr(void)
|
|
{
|
|
struct xics_cppr *os_cppr = this_cpu_ptr(&xics_cppr);
|
|
|
|
if (WARN_ON(os_cppr->index < 1))
|
|
return LOWEST_PRIORITY;
|
|
|
|
return os_cppr->stack[--os_cppr->index];
|
|
}
|
|
|
|
static inline void xics_set_base_cppr(unsigned char cppr)
|
|
{
|
|
struct xics_cppr *os_cppr = this_cpu_ptr(&xics_cppr);
|
|
|
|
/* we only really want to set the priority when there's
|
|
* just one cppr value on the stack
|
|
*/
|
|
WARN_ON(os_cppr->index != 0);
|
|
|
|
os_cppr->stack[0] = cppr;
|
|
}
|
|
|
|
static inline unsigned char xics_cppr_top(void)
|
|
{
|
|
struct xics_cppr *os_cppr = this_cpu_ptr(&xics_cppr);
|
|
|
|
return os_cppr->stack[os_cppr->index];
|
|
}
|
|
|
|
DECLARE_PER_CPU_SHARED_ALIGNED(unsigned long, xics_ipi_message);
|
|
|
|
extern void xics_init(void);
|
|
extern void xics_setup_cpu(void);
|
|
extern void xics_update_irq_servers(void);
|
|
extern void xics_set_cpu_giq(unsigned int gserver, unsigned int join);
|
|
extern void xics_mask_unknown_vec(unsigned int vec);
|
|
extern irqreturn_t xics_ipi_dispatch(int cpu);
|
|
extern void xics_smp_probe(void);
|
|
extern void xics_register_ics(struct ics *ics);
|
|
extern void xics_teardown_cpu(void);
|
|
extern void xics_kexec_teardown_cpu(int secondary);
|
|
extern void xics_migrate_irqs_away(void);
|
|
extern void icp_native_eoi(struct irq_data *d);
|
|
extern int xics_set_irq_type(struct irq_data *d, unsigned int flow_type);
|
|
extern int xics_retrigger(struct irq_data *data);
|
|
#ifdef CONFIG_SMP
|
|
extern int xics_get_irq_server(unsigned int virq, const struct cpumask *cpumask,
|
|
unsigned int strict_check);
|
|
#else
|
|
#define xics_get_irq_server(virq, cpumask, strict_check) (xics_default_server)
|
|
#endif
|
|
|
|
|
|
#endif /* _XICS_H */
|