[POWERPC] ps3: add interrupt support
Adds routines to interface with the PS3 interrupt services. Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
This commit is contained in:
Geoff Levand
Paul Mackerras
Родитель
6e74b38a7f
Коммит
2832a81df7
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@ -0,0 +1,575 @@
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/*
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* PS3 interrupt routines.
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*
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* Copyright (C) 2006 Sony Computer Entertainment Inc.
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* Copyright 2006 Sony Corp.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/irq.h>
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#include <asm/machdep.h>
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#include <asm/udbg.h>
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#include <asm/ps3.h>
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#include <asm/lv1call.h>
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#include "platform.h"
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#if defined(DEBUG)
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#define DBG(fmt...) udbg_printf(fmt)
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#else
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#define DBG(fmt...) do{if(0)printk(fmt);}while(0)
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#endif
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/**
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* ps3_alloc_io_irq - Assign a virq to a system bus device.
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* interrupt_id: The device interrupt id read from the system repository.
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* @virq: The assigned Linux virq.
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*
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* An io irq represents a non-virtualized device interrupt. interrupt_id
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* coresponds to the interrupt number of the interrupt controller.
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*/
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int ps3_alloc_io_irq(unsigned int interrupt_id, unsigned int *virq)
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{
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int result;
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unsigned long outlet;
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result = lv1_construct_io_irq_outlet(interrupt_id, &outlet);
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if (result) {
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pr_debug("%s:%d: lv1_construct_io_irq_outlet failed: %s\n",
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__func__, __LINE__, ps3_result(result));
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return result;
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}
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*virq = irq_create_mapping(NULL, outlet);
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pr_debug("%s:%d: interrupt_id %u => outlet %lu, virq %u\n",
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__func__, __LINE__, interrupt_id, outlet, *virq);
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return 0;
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}
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int ps3_free_io_irq(unsigned int virq)
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{
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int result;
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result = lv1_destruct_io_irq_outlet(virq_to_hw(virq));
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if (!result)
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pr_debug("%s:%d: lv1_destruct_io_irq_outlet failed: %s\n",
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__func__, __LINE__, ps3_result(result));
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irq_dispose_mapping(virq);
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return result;
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}
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/**
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* ps3_alloc_event_irq - Allocate a virq for use with a system event.
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* @virq: The assigned Linux virq.
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*
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* The virq can be used with lv1_connect_interrupt_event_receive_port() to
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* arrange to receive events, or with ps3_send_event_locally() to signal
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* events.
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*/
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int ps3_alloc_event_irq(unsigned int *virq)
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{
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int result;
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unsigned long outlet;
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result = lv1_construct_event_receive_port(&outlet);
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if (result) {
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pr_debug("%s:%d: lv1_construct_event_receive_port failed: %s\n",
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__func__, __LINE__, ps3_result(result));
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*virq = NO_IRQ;
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return result;
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}
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*virq = irq_create_mapping(NULL, outlet);
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pr_debug("%s:%d: outlet %lu, virq %u\n", __func__, __LINE__, outlet,
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*virq);
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return 0;
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}
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int ps3_free_event_irq(unsigned int virq)
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{
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int result;
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pr_debug(" -> %s:%d\n", __func__, __LINE__);
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result = lv1_destruct_event_receive_port(virq_to_hw(virq));
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if (result)
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pr_debug("%s:%d: lv1_destruct_event_receive_port failed: %s\n",
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__func__, __LINE__, ps3_result(result));
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irq_dispose_mapping(virq);
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pr_debug(" <- %s:%d\n", __func__, __LINE__);
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return result;
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}
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int ps3_send_event_locally(unsigned int virq)
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{
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return lv1_send_event_locally(virq_to_hw(virq));
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}
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/**
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* ps3_connect_event_irq - Assign a virq to a system bus device.
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* @did: The HV device identifier read from the system repository.
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* @interrupt_id: The device interrupt id read from the system repository.
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* @virq: The assigned Linux virq.
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*
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* An event irq represents a virtual device interrupt. The interrupt_id
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* coresponds to the software interrupt number.
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*/
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int ps3_connect_event_irq(const struct ps3_device_id *did,
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unsigned int interrupt_id, unsigned int *virq)
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{
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int result;
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result = ps3_alloc_event_irq(virq);
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if (result)
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return result;
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result = lv1_connect_interrupt_event_receive_port(did->bus_id,
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did->dev_id, virq_to_hw(*virq), interrupt_id);
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if (result) {
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pr_debug("%s:%d: lv1_connect_interrupt_event_receive_port"
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" failed: %s\n", __func__, __LINE__,
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ps3_result(result));
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ps3_free_event_irq(*virq);
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*virq = NO_IRQ;
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return result;
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}
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pr_debug("%s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__,
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interrupt_id, *virq);
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return 0;
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}
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int ps3_disconnect_event_irq(const struct ps3_device_id *did,
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unsigned int interrupt_id, unsigned int virq)
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{
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int result;
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pr_debug(" -> %s:%d: interrupt_id %u, virq %u\n", __func__, __LINE__,
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interrupt_id, virq);
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result = lv1_disconnect_interrupt_event_receive_port(did->bus_id,
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did->dev_id, virq_to_hw(virq), interrupt_id);
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if (result)
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pr_debug("%s:%d: lv1_disconnect_interrupt_event_receive_port"
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" failed: %s\n", __func__, __LINE__,
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ps3_result(result));
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ps3_free_event_irq(virq);
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pr_debug(" <- %s:%d\n", __func__, __LINE__);
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return result;
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}
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/**
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* ps3_alloc_vuart_irq - Configure the system virtual uart virq.
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* @virt_addr_bmp: The caller supplied virtual uart interrupt bitmap.
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* @virq: The assigned Linux virq.
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*
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* The system supports only a single virtual uart, so multiple calls without
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* freeing the interrupt will return a wrong state error.
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*/
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int ps3_alloc_vuart_irq(void* virt_addr_bmp, unsigned int *virq)
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{
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int result;
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unsigned long outlet;
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unsigned long lpar_addr;
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BUG_ON(!is_kernel_addr((unsigned long)virt_addr_bmp));
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lpar_addr = ps3_mm_phys_to_lpar(__pa(virt_addr_bmp));
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result = lv1_configure_virtual_uart_irq(lpar_addr, &outlet);
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if (result) {
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pr_debug("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n",
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__func__, __LINE__, ps3_result(result));
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return result;
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}
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*virq = irq_create_mapping(NULL, outlet);
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pr_debug("%s:%d: outlet %lu, virq %u\n", __func__, __LINE__,
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outlet, *virq);
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return 0;
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}
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int ps3_free_vuart_irq(unsigned int virq)
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{
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int result;
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result = lv1_deconfigure_virtual_uart_irq();
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if (result) {
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pr_debug("%s:%d: lv1_configure_virtual_uart_irq failed: %s\n",
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__func__, __LINE__, ps3_result(result));
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return result;
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}
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irq_dispose_mapping(virq);
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return result;
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}
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/**
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* ps3_alloc_spe_irq - Configure an spe virq.
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* @spe_id: The spe_id returned from lv1_construct_logical_spe().
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* @class: The spe interrupt class {0,1,2}.
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* @virq: The assigned Linux virq.
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*
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*/
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int ps3_alloc_spe_irq(unsigned long spe_id, unsigned int class,
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unsigned int *virq)
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{
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int result;
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unsigned long outlet;
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BUG_ON(class > 2);
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result = lv1_get_spe_irq_outlet(spe_id, class, &outlet);
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if (result) {
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pr_debug("%s:%d: lv1_get_spe_irq_outlet failed: %s\n",
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__func__, __LINE__, ps3_result(result));
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return result;
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}
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*virq = irq_create_mapping(NULL, outlet);
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pr_debug("%s:%d: spe_id %lu, class %u, outlet %lu, virq %u\n",
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__func__, __LINE__, spe_id, class, outlet, *virq);
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return 0;
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}
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int ps3_free_spe_irq(unsigned int virq)
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{
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irq_dispose_mapping(virq);
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return 0;
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}
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#define PS3_INVALID_OUTLET ((irq_hw_number_t)-1)
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#define PS3_PLUG_MAX 63
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/**
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* struct bmp - a per cpu irq status and mask bitmap structure
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* @status: 256 bit status bitmap indexed by plug
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* @unused_1:
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* @mask: 256 bit mask bitmap indexed by plug
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* @unused_2:
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* @lock:
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* @ipi_debug_brk_mask:
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*
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* The HV mantains per SMT thread mappings of HV outlet to HV plug on
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* behalf of the guest. These mappings are implemented as 256 bit guest
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* supplied bitmaps indexed by plug number. The address of the bitmaps are
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* registered with the HV through lv1_configure_irq_state_bitmap().
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*
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* The HV supports 256 plugs per thread, assigned as {0..255}, for a total
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* of 512 plugs supported on a processor. To simplify the logic this
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* implementation equates HV plug value to linux virq value, constrains each
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* interrupt to have a system wide unique plug number, and limits the range
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* of the plug values to map into the first dword of the bitmaps. This
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* gives a usable range of plug values of {NUM_ISA_INTERRUPTS..63}. Note
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* that there is no constraint on how many in this set an individual thread
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* can aquire.
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*/
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struct bmp {
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struct {
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unsigned long status;
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unsigned long unused_1[3];
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unsigned long mask;
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unsigned long unused_2[3];
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} __attribute__ ((packed));
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spinlock_t lock;
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unsigned long ipi_debug_brk_mask;
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};
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/**
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* struct private - a per cpu data structure
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* @node: HV node id
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* @cpu: HV thread id
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* @bmp: an HV bmp structure
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*/
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struct private {
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unsigned long node;
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unsigned int cpu;
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struct bmp bmp;
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};
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#if defined(DEBUG)
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static void _dump_64_bmp(const char *header, const unsigned long *p, unsigned cpu,
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const char* func, int line)
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{
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pr_debug("%s:%d: %s %u {%04lx_%04lx_%04lx_%04lx}\n",
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func, line, header, cpu,
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*p >> 48, (*p >> 32) & 0xffff, (*p >> 16) & 0xffff,
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*p & 0xffff);
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}
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static void __attribute__ ((unused)) _dump_256_bmp(const char *header,
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const unsigned long *p, unsigned cpu, const char* func, int line)
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{
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pr_debug("%s:%d: %s %u {%016lx:%016lx:%016lx:%016lx}\n",
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func, line, header, cpu, p[0], p[1], p[2], p[3]);
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}
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#define dump_bmp(_x) _dump_bmp(_x, __func__, __LINE__)
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static void _dump_bmp(struct private* pd, const char* func, int line)
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{
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unsigned long flags;
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spin_lock_irqsave(&pd->bmp.lock, flags);
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_dump_64_bmp("stat", &pd->bmp.status, pd->cpu, func, line);
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_dump_64_bmp("mask", &pd->bmp.mask, pd->cpu, func, line);
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spin_unlock_irqrestore(&pd->bmp.lock, flags);
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}
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#define dump_mask(_x) _dump_mask(_x, __func__, __LINE__)
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static void __attribute__ ((unused)) _dump_mask(struct private* pd,
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const char* func, int line)
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{
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unsigned long flags;
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spin_lock_irqsave(&pd->bmp.lock, flags);
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_dump_64_bmp("mask", &pd->bmp.mask, pd->cpu, func, line);
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spin_unlock_irqrestore(&pd->bmp.lock, flags);
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}
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#else
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static void dump_bmp(struct private* pd) {};
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#endif /* defined(DEBUG) */
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static void chip_mask(unsigned int virq)
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{
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unsigned long flags;
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struct private *pd = get_irq_chip_data(virq);
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pr_debug("%s:%d: cpu %u, virq %d\n", __func__, __LINE__, pd->cpu, virq);
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BUG_ON(virq < NUM_ISA_INTERRUPTS);
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BUG_ON(virq > PS3_PLUG_MAX);
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spin_lock_irqsave(&pd->bmp.lock, flags);
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pd->bmp.mask &= ~(0x8000000000000000UL >> virq);
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spin_unlock_irqrestore(&pd->bmp.lock, flags);
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lv1_did_update_interrupt_mask(pd->node, pd->cpu);
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}
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static void chip_unmask(unsigned int virq)
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{
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unsigned long flags;
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struct private *pd = get_irq_chip_data(virq);
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pr_debug("%s:%d: cpu %u, virq %d\n", __func__, __LINE__, pd->cpu, virq);
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BUG_ON(virq < NUM_ISA_INTERRUPTS);
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BUG_ON(virq > PS3_PLUG_MAX);
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spin_lock_irqsave(&pd->bmp.lock, flags);
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pd->bmp.mask |= (0x8000000000000000UL >> virq);
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spin_unlock_irqrestore(&pd->bmp.lock, flags);
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lv1_did_update_interrupt_mask(pd->node, pd->cpu);
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}
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static void chip_eoi(unsigned int virq)
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{
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lv1_end_of_interrupt(virq);
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}
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static struct irq_chip irq_chip = {
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.typename = "ps3",
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.mask = chip_mask,
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.unmask = chip_unmask,
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.eoi = chip_eoi,
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};
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static void host_unmap(struct irq_host *h, unsigned int virq)
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{
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int result;
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pr_debug("%s:%d: virq %d\n", __func__, __LINE__, virq);
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lv1_disconnect_irq_plug(virq);
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result = set_irq_chip_data(virq, NULL);
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BUG_ON(result);
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}
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static DEFINE_PER_CPU(struct private, private);
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static int host_map(struct irq_host *h, unsigned int virq,
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irq_hw_number_t hwirq)
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{
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int result;
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unsigned int cpu;
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pr_debug(" -> %s:%d\n", __func__, __LINE__);
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pr_debug("%s:%d: hwirq %lu => virq %u\n", __func__, __LINE__, hwirq,
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virq);
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/* bind this virq to a cpu */
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preempt_disable();
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cpu = smp_processor_id();
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result = lv1_connect_irq_plug(virq, hwirq);
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preempt_enable();
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if (result) {
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pr_info("%s:%d: lv1_connect_irq_plug failed:"
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" %s\n", __func__, __LINE__, ps3_result(result));
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return -EPERM;
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}
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result = set_irq_chip_data(virq, &per_cpu(private, cpu));
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BUG_ON(result);
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set_irq_chip_and_handler(virq, &irq_chip, handle_fasteoi_irq);
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pr_debug(" <- %s:%d\n", __func__, __LINE__);
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return result;
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}
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static struct irq_host_ops host_ops = {
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.map = host_map,
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.unmap = host_unmap,
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};
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void __init ps3_register_ipi_debug_brk(unsigned int cpu, unsigned int virq)
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{
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struct private *pd = &per_cpu(private, cpu);
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||||
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pd->bmp.ipi_debug_brk_mask = 0x8000000000000000UL >> virq;
|
||||
|
||||
pr_debug("%s:%d: cpu %u, virq %u, mask %lxh\n", __func__, __LINE__,
|
||||
cpu, virq, pd->bmp.ipi_debug_brk_mask);
|
||||
}
|
||||
|
||||
static int bmp_get_and_clear_status_bit(struct bmp *m)
|
||||
{
|
||||
unsigned long flags;
|
||||
unsigned int bit;
|
||||
unsigned long x;
|
||||
|
||||
spin_lock_irqsave(&m->lock, flags);
|
||||
|
||||
/* 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);
|
||||
|
||||
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;
|
||||
}
|
||||
|
||||
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));
|
||||
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));
|
||||
BUG();
|
||||
}
|
||||
#endif
|
||||
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);
|
||||
|
||||
host = irq_alloc_host(IRQ_HOST_MAP_NOMAP, 0, &host_ops,
|
||||
PS3_INVALID_OUTLET);
|
||||
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);
|
||||
|
||||
pd->node = node;
|
||||
pd->cpu = cpu;
|
||||
spin_lock_init(&pd->bmp.lock);
|
||||
|
||||
result = lv1_configure_irq_state_bitmap(node, cpu,
|
||||
ps3_mm_phys_to_lpar(__pa(&pd->bmp.status)));
|
||||
|
||||
if (result)
|
||||
pr_debug("%s:%d: lv1_configure_irq_state_bitmap failed:"
|
||||
" %s\n", __func__, __LINE__,
|
||||
ps3_result(result));
|
||||
}
|
||||
|
||||
ppc_md.get_irq = ps3_get_irq;
|
||||
}
|
||||
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