diff options
Diffstat (limited to 'arch/powerpc/platforms/ps3/interrupt.c')
| -rw-r--r-- | arch/powerpc/platforms/ps3/interrupt.c | 800 |
1 files changed, 509 insertions, 291 deletions
diff --git a/arch/powerpc/platforms/ps3/interrupt.c b/arch/powerpc/platforms/ps3/interrupt.c index 056c1e4141b..5f3b23220b8 100644 --- a/arch/powerpc/platforms/ps3/interrupt.c +++ b/arch/powerpc/platforms/ps3/interrupt.c @@ -19,113 +19,366 @@ */ #include <linux/kernel.h> -#include <linux/module.h> +#include <linux/export.h> #include <linux/irq.h> #include <asm/machdep.h> #include <asm/udbg.h> -#include <asm/ps3.h> #include <asm/lv1call.h> +#include <asm/smp.h> #include "platform.h" #if defined(DEBUG) -#define DBG(fmt...) udbg_printf(fmt) +#define DBG udbg_printf +#define FAIL udbg_printf #else -#define DBG(fmt...) do{if(0)printk(fmt);}while(0) +#define DBG pr_devel +#define FAIL pr_debug #endif /** - * ps3_alloc_io_irq - Assign a virq to a system bus device. - * interrupt_id: The device interrupt id read from the system repository. + * struct ps3_bmp - a per cpu irq status and mask bitmap structure + * @status: 256 bit status bitmap indexed by plug + * @unused_1: Alignment + * @mask: 256 bit mask bitmap indexed by plug + * @unused_2: Alignment + * + * The HV maintains per SMT thread mappings of HV outlet to HV plug on + * behalf of the guest. These mappings are implemented as 256 bit guest + * supplied bitmaps indexed by plug number. The addresses of the bitmaps + * are registered with the HV through lv1_configure_irq_state_bitmap(). + * The HV requires that the 512 bits of status + mask not cross a page + * boundary. PS3_BMP_MINALIGN is used to define this minimal 64 byte + * alignment. + * + * The HV supports 256 plugs per thread, assigned as {0..255}, for a total + * of 512 plugs supported on a processor. To simplify the logic this + * implementation equates HV plug value to Linux virq value, constrains each + * interrupt to have a system wide unique plug number, and limits the range + * of the plug values to map into the first dword of the bitmaps. This + * gives a usable range of plug values of {NUM_ISA_INTERRUPTS..63}. Note + * that there is no constraint on how many in this set an individual thread + * can acquire. + * + * The mask is declared as unsigned long so we can use set/clear_bit on it. + */ + +#define PS3_BMP_MINALIGN 64 + +struct ps3_bmp { + struct { + u64 status; + u64 unused_1[3]; + unsigned long mask; + u64 unused_2[3]; + }; +}; + +/** + * struct ps3_private - a per cpu data structure + * @bmp: ps3_bmp structure + * @bmp_lock: Syncronize access to bmp. + * @ipi_debug_brk_mask: Mask for debug break IPIs + * @ppe_id: HV logical_ppe_id + * @thread_id: HV thread_id + * @ipi_mask: Mask of IPI virqs + */ + +struct ps3_private { + struct ps3_bmp bmp __attribute__ ((aligned (PS3_BMP_MINALIGN))); + spinlock_t bmp_lock; + u64 ppe_id; + u64 thread_id; + unsigned long ipi_debug_brk_mask; + unsigned long ipi_mask; +}; + +static DEFINE_PER_CPU(struct ps3_private, ps3_private); + +/** + * ps3_chip_mask - Set an interrupt mask bit in ps3_bmp. * @virq: The assigned Linux virq. * - * An io irq represents a non-virtualized device interrupt. interrupt_id - * coresponds to the interrupt number of the interrupt controller. + * Sets ps3_bmp.mask and calls lv1_did_update_interrupt_mask(). */ -int ps3_alloc_io_irq(unsigned int interrupt_id, unsigned int *virq) +static void ps3_chip_mask(struct irq_data *d) +{ + struct ps3_private *pd = irq_data_get_irq_chip_data(d); + unsigned long flags; + + DBG("%s:%d: thread_id %llu, virq %d\n", __func__, __LINE__, + pd->thread_id, d->irq); + + local_irq_save(flags); + clear_bit(63 - d->irq, &pd->bmp.mask); + lv1_did_update_interrupt_mask(pd->ppe_id, pd->thread_id); + local_irq_restore(flags); +} + +/** + * ps3_chip_unmask - Clear an interrupt mask bit in ps3_bmp. + * @virq: The assigned Linux virq. + * + * Clears ps3_bmp.mask and calls lv1_did_update_interrupt_mask(). + */ + +static void ps3_chip_unmask(struct irq_data *d) +{ + struct ps3_private *pd = irq_data_get_irq_chip_data(d); + unsigned long flags; + + DBG("%s:%d: thread_id %llu, virq %d\n", __func__, __LINE__, + pd->thread_id, d->irq); + + local_irq_save(flags); + set_bit(63 - d->irq, &pd->bmp.mask); + lv1_did_update_interrupt_mask(pd->ppe_id, pd->thread_id); + local_irq_restore(flags); +} + +/** + * ps3_chip_eoi - HV end-of-interrupt. + * @virq: The assigned Linux virq. + * + * Calls lv1_end_of_interrupt_ext(). + */ + +static void ps3_chip_eoi(struct irq_data *d) +{ + const struct ps3_private *pd = irq_data_get_irq_chip_data(d); + + /* non-IPIs are EOIed here. */ + + if (!test_bit(63 - d->irq, &pd->ipi_mask)) + lv1_end_of_interrupt_ext(pd->ppe_id, pd->thread_id, d->irq); +} + +/** + * ps3_irq_chip - Represents the ps3_bmp as a Linux struct irq_chip. + */ + +static struct irq_chip ps3_irq_chip = { + .name = "ps3", + .irq_mask = ps3_chip_mask, + .irq_unmask = ps3_chip_unmask, + .irq_eoi = ps3_chip_eoi, +}; + +/** + * ps3_virq_setup - virq related setup. + * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be + * serviced on. + * @outlet: The HV outlet from the various create outlet routines. + * @virq: The assigned Linux virq. + * + * Calls irq_create_mapping() to get a virq and sets the chip data to + * ps3_private data. + */ + +static int ps3_virq_setup(enum ps3_cpu_binding cpu, unsigned long outlet, + unsigned int *virq) { int result; - unsigned long outlet; + struct ps3_private *pd; - result = lv1_construct_io_irq_outlet(interrupt_id, &outlet); + /* This defines the default interrupt distribution policy. */ + + if (cpu == PS3_BINDING_CPU_ANY) + cpu = 0; + + pd = &per_cpu(ps3_private, cpu); + + *virq = irq_create_mapping(NULL, outlet); + + if (*virq == NO_IRQ) { + FAIL("%s:%d: irq_create_mapping failed: outlet %lu\n", + __func__, __LINE__, outlet); + result = -ENOMEM; + goto fail_create; + } + + DBG("%s:%d: outlet %lu => cpu %u, virq %u\n", __func__, __LINE__, + outlet, cpu, *virq); + + result = irq_set_chip_data(*virq, pd); if (result) { - pr_debug("%s:%d: lv1_construct_io_irq_outlet failed: %s\n", - __func__, __LINE__, ps3_result(result)); - return result; + FAIL("%s:%d: irq_set_chip_data failed\n", + __func__, __LINE__); + goto fail_set; } - *virq = irq_create_mapping(NULL, outlet); + ps3_chip_mask(irq_get_irq_data(*virq)); + + return result; + +fail_set: + irq_dispose_mapping(*virq); +fail_create: + return result; +} + +/** + * ps3_virq_destroy - virq related teardown. + * @virq: The assigned Linux virq. + * + * Clears chip data and calls irq_dispose_mapping() for the virq. + */ + +static int ps3_virq_destroy(unsigned int virq) +{ + const struct ps3_private *pd = irq_get_chip_data(virq); + + DBG("%s:%d: ppe_id %llu, thread_id %llu, virq %u\n", __func__, + __LINE__, pd->ppe_id, pd->thread_id, virq); - pr_debug("%s:%d: interrupt_id %u => outlet %lu, virq %u\n", - __func__, __LINE__, interrupt_id, outlet, *virq); + irq_set_chip_data(virq, NULL); + irq_dispose_mapping(virq); + DBG("%s:%d <-\n", __func__, __LINE__); return 0; } -int ps3_free_io_irq(unsigned int virq) +/** + * ps3_irq_plug_setup - Generic outlet and virq related setup. + * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be + * serviced on. + * @outlet: The HV outlet from the various create outlet routines. + * @virq: The assigned Linux virq. + * + * Sets up virq and connects the irq plug. + */ + +int ps3_irq_plug_setup(enum ps3_cpu_binding cpu, unsigned long outlet, + unsigned int *virq) { int result; + struct ps3_private *pd; - result = lv1_destruct_io_irq_outlet(virq_to_hw(virq)); + result = ps3_virq_setup(cpu, outlet, virq); - if (!result) - pr_debug("%s:%d: lv1_destruct_io_irq_outlet failed: %s\n", - __func__, __LINE__, ps3_result(result)); + if (result) { + FAIL("%s:%d: ps3_virq_setup failed\n", __func__, __LINE__); + goto fail_setup; + } - irq_dispose_mapping(virq); + pd = irq_get_chip_data(*virq); + + /* Binds outlet to cpu + virq. */ + + result = lv1_connect_irq_plug_ext(pd->ppe_id, pd->thread_id, *virq, + outlet, 0); + + if (result) { + FAIL("%s:%d: lv1_connect_irq_plug_ext failed: %s\n", + __func__, __LINE__, ps3_result(result)); + result = -EPERM; + goto fail_connect; + } + + return result; +fail_connect: + ps3_virq_destroy(*virq); +fail_setup: return result; } +EXPORT_SYMBOL_GPL(ps3_irq_plug_setup); /** - * ps3_alloc_event_irq - Allocate a virq for use with a system event. + * ps3_irq_plug_destroy - Generic outlet and virq related teardown. + * @virq: The assigned Linux virq. + * + * Disconnects the irq plug and tears down virq. + * Do not call for system bus event interrupts setup with + * ps3_sb_event_receive_port_setup(). + */ + +int ps3_irq_plug_destroy(unsigned int virq) +{ + int result; + const struct ps3_private *pd = irq_get_chip_data(virq); + + DBG("%s:%d: ppe_id %llu, thread_id %llu, virq %u\n", __func__, + __LINE__, pd->ppe_id, pd->thread_id, virq); + + ps3_chip_mask(irq_get_irq_data(virq)); + + result = lv1_disconnect_irq_plug_ext(pd->ppe_id, pd->thread_id, virq); + + if (result) + FAIL("%s:%d: lv1_disconnect_irq_plug_ext failed: %s\n", + __func__, __LINE__, ps3_result(result)); + + ps3_virq_destroy(virq); + + return result; +} +EXPORT_SYMBOL_GPL(ps3_irq_plug_destroy); + +/** + * ps3_event_receive_port_setup - Setup an event receive port. + * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be + * serviced on. * @virq: The assigned Linux virq. * * The virq can be used with lv1_connect_interrupt_event_receive_port() to - * arrange to receive events, or with ps3_send_event_locally() to signal - * events. + * arrange to receive interrupts from system-bus devices, or with + * ps3_send_event_locally() to signal events. */ -int ps3_alloc_event_irq(unsigned int *virq) +int ps3_event_receive_port_setup(enum ps3_cpu_binding cpu, unsigned int *virq) { int result; - unsigned long outlet; + u64 outlet; result = lv1_construct_event_receive_port(&outlet); if (result) { - pr_debug("%s:%d: lv1_construct_event_receive_port failed: %s\n", + FAIL("%s:%d: lv1_construct_event_receive_port failed: %s\n", __func__, __LINE__, ps3_result(result)); *virq = NO_IRQ; return result; } - *virq = irq_create_mapping(NULL, outlet); - - pr_debug("%s:%d: outlet %lu, virq %u\n", __func__, __LINE__, outlet, - *virq); + result = ps3_irq_plug_setup(cpu, outlet, virq); + BUG_ON(result); - return 0; + return result; } +EXPORT_SYMBOL_GPL(ps3_event_receive_port_setup); + +/** + * ps3_event_receive_port_destroy - Destroy an event receive port. + * @virq: The assigned Linux virq. + * + * Since ps3_event_receive_port_destroy destroys the receive port outlet, + * SB devices need to call disconnect_interrupt_event_receive_port() before + * this. + */ -int ps3_free_event_irq(unsigned int virq) +int ps3_event_receive_port_destroy(unsigned int virq) { int result; - pr_debug(" -> %s:%d\n", __func__, __LINE__); + DBG(" -> %s:%d virq %u\n", __func__, __LINE__, virq); + + ps3_chip_mask(irq_get_irq_data(virq)); result = lv1_destruct_event_receive_port(virq_to_hw(virq)); if (result) - pr_debug("%s:%d: lv1_destruct_event_receive_port failed: %s\n", + FAIL("%s:%d: lv1_destruct_event_receive_port failed: %s\n", __func__, __LINE__, ps3_result(result)); - irq_dispose_mapping(virq); + /* + * Don't call ps3_virq_destroy() here since ps3_smp_cleanup_cpu() + * calls from interrupt context (smp_call_function) when kexecing. + */ - pr_debug(" <- %s:%d\n", __func__, __LINE__); + DBG(" <- %s:%d\n", __func__, __LINE__); return result; } @@ -135,67 +388,142 @@ int ps3_send_event_locally(unsigned int virq) } /** - * ps3_connect_event_irq - Assign a virq to a system bus device. - * @did: The HV device identifier read from the system repository. - * @interrupt_id: The device interrupt id read from the system repository. + * ps3_sb_event_receive_port_setup - Setup a system bus event receive port. + * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be + * serviced on. + * @dev: The system bus device instance. * @virq: The assigned Linux virq. * * An event irq represents a virtual device interrupt. The interrupt_id * coresponds to the software interrupt number. */ -int ps3_connect_event_irq(const struct ps3_device_id *did, - unsigned int interrupt_id, unsigned int *virq) +int ps3_sb_event_receive_port_setup(struct ps3_system_bus_device *dev, + enum ps3_cpu_binding cpu, unsigned int *virq) { + /* this should go in system-bus.c */ + int result; - result = ps3_alloc_event_irq(virq); + result = ps3_event_receive_port_setup(cpu, virq); if (result) return result; - result = lv1_connect_interrupt_event_receive_port(did->bus_id, - did->dev_id, virq_to_hw(*virq), interrupt_id); + result = lv1_connect_interrupt_event_receive_port(dev->bus_id, + dev->dev_id, virq_to_hw(*virq), dev->interrupt_id); if (result) { - pr_debug("%s:%d: lv1_connect_interrupt_event_receive_port" + FAIL("%s:%d: lv1_connect_interrupt_event_receive_port" " failed: %s\n", __func__, __LINE__, ps3_result(result)); - ps3_free_event_irq(*virq); + ps3_event_receive_port_destroy(*virq); *virq = NO_IRQ; return result; } - pr_debug("%s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__, - interrupt_id, *virq); + DBG("%s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__, + dev->interrupt_id, *virq); return 0; } +EXPORT_SYMBOL(ps3_sb_event_receive_port_setup); -int ps3_disconnect_event_irq(const struct ps3_device_id *did, - unsigned int interrupt_id, unsigned int virq) +int ps3_sb_event_receive_port_destroy(struct ps3_system_bus_device *dev, + unsigned int virq) { + /* this should go in system-bus.c */ + int result; - pr_debug(" -> %s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__, - interrupt_id, virq); + DBG(" -> %s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__, + dev->interrupt_id, virq); - result = lv1_disconnect_interrupt_event_receive_port(did->bus_id, - did->dev_id, virq_to_hw(virq), interrupt_id); + result = lv1_disconnect_interrupt_event_receive_port(dev->bus_id, + dev->dev_id, virq_to_hw(virq), dev->interrupt_id); if (result) - pr_debug("%s:%d: lv1_disconnect_interrupt_event_receive_port" + FAIL("%s:%d: lv1_disconnect_interrupt_event_receive_port" " failed: %s\n", __func__, __LINE__, ps3_result(result)); - ps3_free_event_irq(virq); + result = ps3_event_receive_port_destroy(virq); + BUG_ON(result); + + /* + * ps3_event_receive_port_destroy() destroys the IRQ plug, + * so don't call ps3_irq_plug_destroy() here. + */ + + result = ps3_virq_destroy(virq); + BUG_ON(result); - pr_debug(" <- %s:%d\n", __func__, __LINE__); + DBG(" <- %s:%d\n", __func__, __LINE__); return result; } +EXPORT_SYMBOL(ps3_sb_event_receive_port_destroy); /** - * ps3_alloc_vuart_irq - Configure the system virtual uart virq. + * ps3_io_irq_setup - Setup a system bus io irq. + * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be + * serviced on. + * @interrupt_id: The device interrupt id read from the system repository. + * @virq: The assigned Linux virq. + * + * An io irq represents a non-virtualized device interrupt. interrupt_id + * coresponds to the interrupt number of the interrupt controller. + */ + +int ps3_io_irq_setup(enum ps3_cpu_binding cpu, unsigned int interrupt_id, + unsigned int *virq) +{ + int result; + u64 outlet; + + result = lv1_construct_io_irq_outlet(interrupt_id, &outlet); + + if (result) { + FAIL("%s:%d: lv1_construct_io_irq_outlet failed: %s\n", + __func__, __LINE__, ps3_result(result)); + return result; + } + + result = ps3_irq_plug_setup(cpu, outlet, virq); + BUG_ON(result); + + return result; +} +EXPORT_SYMBOL_GPL(ps3_io_irq_setup); + +int ps3_io_irq_destroy(unsigned int virq) +{ + int result; + unsigned long outlet = virq_to_hw(virq); + + ps3_chip_mask(irq_get_irq_data(virq)); + + /* + * lv1_destruct_io_irq_outlet() will destroy the IRQ plug, + * so call ps3_irq_plug_destroy() first. + */ + + result = ps3_irq_plug_destroy(virq); + BUG_ON(result); + + result = lv1_destruct_io_irq_outlet(outlet); + + if (result) + FAIL("%s:%d: lv1_destruct_io_irq_outlet failed: %s\n", + __func__, __LINE__, ps3_result(result)); + + return result; +} +EXPORT_SYMBOL_GPL(ps3_io_irq_destroy); + +/** + * ps3_vuart_irq_setup - Setup the system virtual uart virq. + * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be + * serviced on. * @virt_addr_bmp: The caller supplied virtual uart interrupt bitmap. * @virq: The assigned Linux virq. * @@ -203,373 +531,263 @@ int ps3_disconnect_event_irq(const struct ps3_device_id *did, * freeing the interrupt will return a wrong state error. */ -int ps3_alloc_vuart_irq(void* virt_addr_bmp, unsigned int *virq) +int ps3_vuart_irq_setup(enum ps3_cpu_binding cpu, void* virt_addr_bmp, + unsigned int *virq) { int result; - unsigned long outlet; - unsigned long lpar_addr; + u64 outlet; + u64 lpar_addr; - BUG_ON(!is_kernel_addr((unsigned long)virt_addr_bmp)); + BUG_ON(!is_kernel_addr((u64)virt_addr_bmp)); lpar_addr = ps3_mm_phys_to_lpar(__pa(virt_addr_bmp)); result = lv1_configure_virtual_uart_irq(lpar_addr, &outlet); if (result) { - pr_debug("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n", + FAIL("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n", __func__, __LINE__, ps3_result(result)); return result; } - *virq = irq_create_mapping(NULL, outlet); - - pr_debug("%s:%d: outlet %lu, virq %u\n", __func__, __LINE__, - outlet, *virq); + result = ps3_irq_plug_setup(cpu, outlet, virq); + BUG_ON(result); - return 0; + return result; } +EXPORT_SYMBOL_GPL(ps3_vuart_irq_setup); -int ps3_free_vuart_irq(unsigned int virq) +int ps3_vuart_irq_destroy(unsigned int virq) { int result; + ps3_chip_mask(irq_get_irq_data(virq)); result = lv1_deconfigure_virtual_uart_irq(); if (result) { - pr_debug("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n", + FAIL("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n", __func__, __LINE__, ps3_result(result)); return result; } - irq_dispose_mapping(virq); + result = ps3_irq_plug_destroy(virq); + BUG_ON(result); return result; } +EXPORT_SYMBOL_GPL(ps3_vuart_irq_destroy); /** - * ps3_alloc_spe_irq - Configure an spe virq. + * ps3_spe_irq_setup - Setup an spe virq. + * @cpu: enum ps3_cpu_binding indicating the cpu the interrupt should be + * serviced on. * @spe_id: The spe_id returned from lv1_construct_logical_spe(). * @class: The spe interrupt class {0,1,2}. * @virq: The assigned Linux virq. * */ -int ps3_alloc_spe_irq(unsigned long spe_id, unsigned int class, - unsigned int *virq) +int ps3_spe_irq_setup(enum ps3_cpu_binding cpu, unsigned long spe_id, + unsigned int class, unsigned int *virq) { int result; - unsigned long outlet; + u64 outlet; BUG_ON(class > 2); result = lv1_get_spe_irq_outlet(spe_id, class, &outlet); if (result) { - pr_debug("%s:%d: lv1_get_spe_irq_outlet failed: %s\n", + FAIL("%s:%d: lv1_get_spe_irq_outlet failed: %s\n", __func__, __LINE__, ps3_result(result)); return result; } - *virq = irq_create_mapping(NULL, outlet); - - pr_debug("%s:%d: spe_id %lu, class %u, outlet %lu, virq %u\n", - __func__, __LINE__, spe_id, class, outlet, *virq); + result = ps3_irq_plug_setup(cpu, outlet, virq); + BUG_ON(result); - return 0; + return result; } -int ps3_free_spe_irq(unsigned int virq) +int ps3_spe_irq_destroy(unsigned int virq) { - irq_dispose_mapping(virq); - return 0; -} + int result; -#define PS3_INVALID_OUTLET ((irq_hw_number_t)-1) -#define PS3_PLUG_MAX 63 + ps3_chip_mask(irq_get_irq_data(virq)); -/** - * struct bmp - a per cpu irq status and mask bitmap structure - * @status: 256 bit status bitmap indexed by plug - * @unused_1: - * @mask: 256 bit mask bitmap indexed by plug - * @unused_2: - * @lock: - * @ipi_debug_brk_mask: - * - * The HV mantains per SMT thread mappings of HV outlet to HV plug on - * behalf of the guest. These mappings are implemented as 256 bit guest - * supplied bitmaps indexed by plug number. The address of the bitmaps are - * registered with the HV through lv1_configure_irq_state_bitmap(). - * - * The HV supports 256 plugs per thread, assigned as {0..255}, for a total - * of 512 plugs supported on a processor. To simplify the logic this - * implementation equates HV plug value to linux virq value, constrains each - * interrupt to have a system wide unique plug number, and limits the range - * of the plug values to map into the first dword of the bitmaps. This - * gives a usable range of plug values of {NUM_ISA_INTERRUPTS..63}. Note - * that there is no constraint on how many in this set an individual thread - * can aquire. - */ + result = ps3_irq_plug_destroy(virq); + BUG_ON(result); -struct bmp { - struct { - unsigned long status; - unsigned long unused_1[3]; - unsigned long mask; - unsigned long unused_2[3]; - } __attribute__ ((packed)); - spinlock_t lock; - unsigned long ipi_debug_brk_mask; -}; + return result; +} -/** - * struct private - a per cpu data structure - * @node: HV node id - * @cpu: HV thread id - * @bmp: an HV bmp structure - */ -struct private { - unsigned long node; - unsigned int cpu; - struct bmp bmp; -}; +#define PS3_INVALID_OUTLET ((irq_hw_number_t)-1) +#define PS3_PLUG_MAX 63 #if defined(DEBUG) -static void _dump_64_bmp(const char *header, const unsigned long *p, unsigned cpu, +static void _dump_64_bmp(const char *header, const u64 *p, unsigned cpu, const char* func, int line) { - pr_debug("%s:%d: %s %u {%04lx_%04lx_%04lx_%04lx}\n", + pr_debug("%s:%d: %s %u {%04llx_%04llx_%04llx_%04llx}\n", func, line, header, cpu, *p >> 48, (*p >> 32) & 0xffff, (*p >> 16) & 0xffff, *p & 0xffff); } -static void __attribute__ ((unused)) _dump_256_bmp(const char *header, - const unsigned long *p, unsigned cpu, const char* func, int line) +static void __maybe_unused _dump_256_bmp(const char *header, + const u64 *p, unsigned cpu, const char* func, int line) { - pr_debug("%s:%d: %s %u {%016lx:%016lx:%016lx:%016lx}\n", + pr_debug("%s:%d: %s %u {%016llx:%016llx:%016llx:%016llx}\n", func, line, header, cpu, p[0], p[1], p[2], p[3]); } #define dump_bmp(_x) _dump_bmp(_x, __func__, __LINE__) -static void _dump_bmp(struct private* pd, const char* func, int line) +static void _dump_bmp(struct ps3_private* pd, const char* func, int line) { unsigned long flags; - spin_lock_irqsave(&pd->bmp.lock, flags); - _dump_64_bmp("stat", &pd->bmp.status, pd->cpu, func, line); - _dump_64_bmp("mask", &pd->bmp.mask, pd->cpu, func, line); - spin_unlock_irqrestore(&pd->bmp.lock, flags); + spin_lock_irqsave(&pd->bmp_lock, flags); + _dump_64_bmp("stat", &pd->bmp.status, pd->thread_id, func, line); + _dump_64_bmp("mask", (u64*)&pd->bmp.mask, pd->thread_id, func, line); + spin_unlock_irqrestore(&pd->bmp_lock, flags); } #define dump_mask(_x) _dump_mask(_x, __func__, __LINE__) -static void __attribute__ ((unused)) _dump_mask(struct private* pd, +static void __maybe_unused _dump_mask(struct ps3_private *pd, const char* func, int line) { unsigned long flags; - spin_lock_irqsave(&pd->bmp.lock, flags); - _dump_64_bmp("mask", &pd->bmp.mask, pd->cpu, func, line); - spin_unlock_irqrestore(&pd->bmp.lock, flags); + spin_lock_irqsave(&pd->bmp_lock, flags); + _dump_64_bmp("mask", (u64*)&pd->bmp.mask, pd->thread_id, func, line); + spin_unlock_irqrestore(&pd->bmp_lock, flags); } #else -static void dump_bmp(struct private* pd) {}; +static void dump_bmp(struct ps3_private* pd) {}; #endif /* defined(DEBUG) */ -static void chip_mask(unsigned int virq) -{ - unsigned long flags; - struct private *pd = get_irq_chip_data(virq); - - pr_debug("%s:%d: cpu %u, virq %d\n", __func__, __LINE__, pd->cpu, virq); - - BUG_ON(virq < NUM_ISA_INTERRUPTS); - BUG_ON(virq > PS3_PLUG_MAX); - - spin_lock_irqsave(&pd->bmp.lock, flags); - pd->bmp.mask &= ~(0x8000000000000000UL >> virq); - spin_unlock_irqrestore(&pd->bmp.lock, flags); - - lv1_did_update_interrupt_mask(pd->node, pd->cpu); -} - -static void chip_unmask(unsigned int virq) +static int ps3_host_map(struct irq_domain *h, unsigned int virq, + irq_hw_number_t hwirq) { - unsigned long flags; - struct private *pd = get_irq_chip_data(virq); - - pr_debug("%s:%d: cpu %u, virq %d\n", __func__, __LINE__, pd->cpu, virq); - - BUG_ON(virq < NUM_ISA_INTERRUPTS); - BUG_ON(virq > PS3_PLUG_MAX); + DBG("%s:%d: hwirq %lu, virq %u\n", __func__, __LINE__, hwirq, + virq); - spin_lock_irqsave(&pd->bmp.lock, flags); - pd->bmp.mask |= (0x8000000000000000UL >> virq); - spin_unlock_irqrestore(&pd->bmp.lock, flags); + irq_set_chip_and_handler(virq, &ps3_irq_chip, handle_fasteoi_irq); - lv1_did_update_interrupt_mask(pd->node, pd->cpu); + return 0; } -static void chip_eoi(unsigned int virq) +static int ps3_host_match(struct irq_domain *h, struct device_node *np) { - lv1_end_of_interrupt(virq); + /* Match all */ + return 1; } -static struct irq_chip irq_chip = { - .typename = "ps3", - .mask = chip_mask, - .unmask = chip_unmask, - .eoi = chip_eoi, +static const struct irq_domain_ops ps3_host_ops = { + .map = ps3_host_map, + .match = ps3_host_match, }; -static void host_unmap(struct irq_host *h, unsigned int virq) -{ - int result; - - pr_debug("%s:%d: virq %d\n", __func__, __LINE__, virq); - - lv1_disconnect_irq_plug(virq); - - result = set_irq_chip_data(virq, NULL); - BUG_ON(result); -} - -static DEFINE_PER_CPU(struct private, private); - -static int host_map(struct irq_host *h, unsigned int virq, - irq_hw_number_t hwirq) +void __init ps3_register_ipi_debug_brk(unsigned int cpu, unsigned int virq) { - int result; - unsigned int cpu; - - pr_debug(" -> %s:%d\n", __func__, __LINE__); - pr_debug("%s:%d: hwirq %lu => virq %u\n", __func__, __LINE__, hwirq, - virq); - - /* bind this virq to a cpu */ - - preempt_disable(); - cpu = smp_processor_id(); - result = lv1_connect_irq_plug(virq, hwirq); - preempt_enable(); - - if (result) { - pr_info("%s:%d: lv1_connect_irq_plug failed:" - " %s\n", __func__, __LINE__, ps3_result(result)); - return -EPERM; - } - - result = set_irq_chip_data(virq, &per_cpu(private, cpu)); - BUG_ON(result); + struct ps3_private *pd = &per_cpu(ps3_private, cpu); - set_irq_chip_and_handler(virq, &irq_chip, handle_fasteoi_irq); + set_bit(63 - virq, &pd->ipi_debug_brk_mask); - pr_debug(" <- %s:%d\n", __func__, __LINE__); - return result; + DBG("%s:%d: cpu %u, virq %u, mask %lxh\n", __func__, __LINE__, + cpu, virq, pd->ipi_debug_brk_mask); } -static struct irq_host_ops host_ops = { - .map = host_map, - .unmap = host_unmap, -}; - -void __init ps3_register_ipi_debug_brk(unsigned int cpu, unsigned int virq) +void __init ps3_register_ipi_irq(unsigned int cpu, unsigned int virq) { - struct private *pd = &per_cpu(private, cpu); + struct ps3_private *pd = &per_cpu(ps3_private, cpu); - pd->bmp.ipi_debug_brk_mask = 0x8000000000000000UL >> virq; + set_bit(63 - virq, &pd->ipi_mask); - pr_debug("%s:%d: cpu %u, virq %u, mask %lxh\n", __func__, __LINE__, - cpu, virq, pd->bmp.ipi_debug_brk_mask); + DBG("%s:%d: cpu %u, virq %u, ipi_mask %lxh\n", __func__, __LINE__, + cpu, virq, pd->ipi_mask); } -static int bmp_get_and_clear_status_bit(struct bmp *m) +static unsigned int ps3_get_irq(void) { - unsigned long flags; - unsigned int bit; - unsigned long x; - - spin_lock_irqsave(&m->lock, flags); + struct ps3_private *pd = &__get_cpu_var(ps3_private); + u64 x = (pd->bmp.status & pd->bmp.mask); + unsigned int plug; /* check for ipi break first to stop this cpu ASAP */ - if (m->status & m->ipi_debug_brk_mask) { - m->status &= ~m->ipi_debug_brk_mask; - spin_unlock_irqrestore(&m->lock, flags); - return __ilog2(m->ipi_debug_brk_mask); - } - - x = (m->status & m->mask); + if (x & pd->ipi_debug_brk_mask) + x &= pd->ipi_debug_brk_mask; - for (bit = NUM_ISA_INTERRUPTS, x <<= bit; x; bit++, x <<= 1) - if (x & 0x8000000000000000UL) { - m->status &= ~(0x8000000000000000UL >> bit); - spin_unlock_irqrestore(&m->lock, flags); - return bit; - } + asm volatile("cntlzd %0,%1" : "=r" (plug) : "r" (x)); + plug &= 0x3f; - spin_unlock_irqrestore(&m->lock, flags); - - pr_debug("%s:%d: not found\n", __func__, __LINE__); - return -1; -} - -unsigned int ps3_get_irq(void) -{ - int plug; - - struct private *pd = &__get_cpu_var(private); - - plug = bmp_get_and_clear_status_bit(&pd->bmp); - - if (plug < 1) { - pr_debug("%s:%d: no plug found: cpu %u\n", __func__, __LINE__, - pd->cpu); - dump_bmp(&per_cpu(private, 0)); - dump_bmp(&per_cpu(private, 1)); + if (unlikely(plug == NO_IRQ)) { + DBG("%s:%d: no plug found: thread_id %llu\n", __func__, + __LINE__, pd->thread_id); + dump_bmp(&per_cpu(ps3_private, 0)); + dump_bmp(&per_cpu(ps3_private, 1)); return NO_IRQ; } #if defined(DEBUG) - if (plug < NUM_ISA_INTERRUPTS || plug > PS3_PLUG_MAX) { - dump_bmp(&per_cpu(private, 0)); - dump_bmp(&per_cpu(private, 1)); + if (unlikely(plug < NUM_ISA_INTERRUPTS || plug > PS3_PLUG_MAX)) { + dump_bmp(&per_cpu(ps3_private, 0)); + dump_bmp(&per_cpu(ps3_private, 1)); BUG(); } #endif + + /* IPIs are EOIed here. */ + + if (test_bit(63 - plug, &pd->ipi_mask)) + lv1_end_of_interrupt_ext(pd->ppe_id, pd->thread_id, plug); + return plug; } void __init ps3_init_IRQ(void) { int result; - unsigned long node; unsigned cpu; - struct irq_host *host; - - lv1_get_logical_ppe_id(&node); + struct irq_domain *host; - host = irq_alloc_host(IRQ_HOST_MAP_NOMAP, 0, &host_ops, - PS3_INVALID_OUTLET); + host = irq_domain_add_nomap(NULL, PS3_PLUG_MAX + 1, &ps3_host_ops, NULL); irq_set_default_host(host); - irq_set_virq_count(PS3_PLUG_MAX + 1); for_each_possible_cpu(cpu) { - struct private *pd = &per_cpu(private, cpu); + struct ps3_private *pd = &per_cpu(ps3_private, cpu); + + lv1_get_logical_ppe_id(&pd->ppe_id); + pd->thread_id = get_hard_smp_processor_id(cpu); + spin_lock_init(&pd->bmp_lock); - pd->node = node; - pd->cpu = cpu; - spin_lock_init(&pd->bmp.lock); + DBG("%s:%d: ppe_id %llu, thread_id %llu, bmp %lxh\n", + __func__, __LINE__, pd->ppe_id, pd->thread_id, + ps3_mm_phys_to_lpar(__pa(&pd->bmp))); - result = lv1_configure_irq_state_bitmap(node, cpu, - ps3_mm_phys_to_lpar(__pa(&pd->bmp.status))); + result = lv1_configure_irq_state_bitmap(pd->ppe_id, + pd->thread_id, ps3_mm_phys_to_lpar(__pa(&pd->bmp))); if (result) - pr_debug("%s:%d: lv1_configure_irq_state_bitmap failed:" + FAIL("%s:%d: lv1_configure_irq_state_bitmap failed:" " %s\n", __func__, __LINE__, ps3_result(result)); } ppc_md.get_irq = ps3_get_irq; } + +void ps3_shutdown_IRQ(int cpu) +{ + int result; + u64 ppe_id; + u64 thread_id = get_hard_smp_processor_id(cpu); + + lv1_get_logical_ppe_id(&ppe_id); + result = lv1_configure_irq_state_bitmap(ppe_id, thread_id, 0); + + DBG("%s:%d: lv1_configure_irq_state_bitmap (%llu:%llu/%d) %s\n", __func__, + __LINE__, ppe_id, thread_id, cpu, ps3_result(result)); +} |