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![Harald Freudenberger](/assets/img/avatar_default.png)
Slight rework of function __ap_revise_reserved() because of unused variable warning when build with W=1. This patch introduces an additional debug feature warning message when device_reprobe() returns with failure. However, the return value of __ap_revise_reserved() is still hard coded to 0 as this is a callback function to be used together with bus_for_each_dev() and thus the return value indicates to go on with the bus_for_each_dev() loop and not apport on a failure of something within this function. Signed-off-by: Harald Freudenberger <freude@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
1960 lines
49 KiB
C
1960 lines
49 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright IBM Corp. 2006, 2021
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* Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
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* Martin Schwidefsky <schwidefsky@de.ibm.com>
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* Ralph Wuerthner <rwuerthn@de.ibm.com>
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* Felix Beck <felix.beck@de.ibm.com>
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* Holger Dengler <hd@linux.vnet.ibm.com>
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* Harald Freudenberger <freude@linux.ibm.com>
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*
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* Adjunct processor bus.
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*/
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#define KMSG_COMPONENT "ap"
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#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
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#include <linux/kernel_stat.h>
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#include <linux/moduleparam.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/err.h>
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#include <linux/freezer.h>
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#include <linux/interrupt.h>
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#include <linux/workqueue.h>
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#include <linux/slab.h>
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#include <linux/notifier.h>
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#include <linux/kthread.h>
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#include <linux/mutex.h>
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#include <asm/airq.h>
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#include <linux/atomic.h>
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#include <asm/isc.h>
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#include <linux/hrtimer.h>
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#include <linux/ktime.h>
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#include <asm/facility.h>
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#include <linux/crypto.h>
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#include <linux/mod_devicetable.h>
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#include <linux/debugfs.h>
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#include <linux/ctype.h>
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#include "ap_bus.h"
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#include "ap_debug.h"
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/*
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* Module parameters; note though this file itself isn't modular.
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*/
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int ap_domain_index = -1; /* Adjunct Processor Domain Index */
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static DEFINE_SPINLOCK(ap_domain_lock);
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module_param_named(domain, ap_domain_index, int, 0440);
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MODULE_PARM_DESC(domain, "domain index for ap devices");
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EXPORT_SYMBOL(ap_domain_index);
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static int ap_thread_flag;
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module_param_named(poll_thread, ap_thread_flag, int, 0440);
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MODULE_PARM_DESC(poll_thread, "Turn on/off poll thread, default is 0 (off).");
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static char *apm_str;
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module_param_named(apmask, apm_str, charp, 0440);
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MODULE_PARM_DESC(apmask, "AP bus adapter mask.");
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static char *aqm_str;
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module_param_named(aqmask, aqm_str, charp, 0440);
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MODULE_PARM_DESC(aqmask, "AP bus domain mask.");
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static int ap_useirq = 1;
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module_param_named(useirq, ap_useirq, int, 0440);
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MODULE_PARM_DESC(useirq, "Use interrupt if available, default is 1 (on).");
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atomic_t ap_max_msg_size = ATOMIC_INIT(AP_DEFAULT_MAX_MSG_SIZE);
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EXPORT_SYMBOL(ap_max_msg_size);
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static struct device *ap_root_device;
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/* Hashtable of all queue devices on the AP bus */
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DEFINE_HASHTABLE(ap_queues, 8);
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/* lock used for the ap_queues hashtable */
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DEFINE_SPINLOCK(ap_queues_lock);
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/* Default permissions (ioctl, card and domain masking) */
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struct ap_perms ap_perms;
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EXPORT_SYMBOL(ap_perms);
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DEFINE_MUTEX(ap_perms_mutex);
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EXPORT_SYMBOL(ap_perms_mutex);
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/* # of bus scans since init */
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static atomic64_t ap_scan_bus_count;
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/* # of bindings complete since init */
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static atomic64_t ap_bindings_complete_count = ATOMIC64_INIT(0);
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/* completion for initial APQN bindings complete */
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static DECLARE_COMPLETION(ap_init_apqn_bindings_complete);
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static struct ap_config_info *ap_qci_info;
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/*
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* AP bus related debug feature things.
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*/
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debug_info_t *ap_dbf_info;
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/*
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* Workqueue timer for bus rescan.
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*/
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static struct timer_list ap_config_timer;
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static int ap_config_time = AP_CONFIG_TIME;
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static void ap_scan_bus(struct work_struct *);
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static DECLARE_WORK(ap_scan_work, ap_scan_bus);
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/*
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* Tasklet & timer for AP request polling and interrupts
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*/
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static void ap_tasklet_fn(unsigned long);
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static DECLARE_TASKLET_OLD(ap_tasklet, ap_tasklet_fn);
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static DECLARE_WAIT_QUEUE_HEAD(ap_poll_wait);
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static struct task_struct *ap_poll_kthread;
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static DEFINE_MUTEX(ap_poll_thread_mutex);
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static DEFINE_SPINLOCK(ap_poll_timer_lock);
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static struct hrtimer ap_poll_timer;
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/*
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* In LPAR poll with 4kHz frequency. Poll every 250000 nanoseconds.
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* If z/VM change to 1500000 nanoseconds to adjust to z/VM polling.
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*/
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static unsigned long long poll_timeout = 250000;
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/* Maximum domain id, if not given via qci */
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static int ap_max_domain_id = 15;
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/* Maximum adapter id, if not given via qci */
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static int ap_max_adapter_id = 63;
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static struct bus_type ap_bus_type;
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/* Adapter interrupt definitions */
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static void ap_interrupt_handler(struct airq_struct *airq, bool floating);
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static bool ap_irq_flag;
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static struct airq_struct ap_airq = {
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.handler = ap_interrupt_handler,
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.isc = AP_ISC,
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};
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/**
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* ap_airq_ptr() - Get the address of the adapter interrupt indicator
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*
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* Returns the address of the local-summary-indicator of the adapter
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* interrupt handler for AP, or NULL if adapter interrupts are not
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* available.
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*/
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void *ap_airq_ptr(void)
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{
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if (ap_irq_flag)
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return ap_airq.lsi_ptr;
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return NULL;
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}
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/**
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* ap_interrupts_available(): Test if AP interrupts are available.
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*
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* Returns 1 if AP interrupts are available.
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*/
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static int ap_interrupts_available(void)
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{
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return test_facility(65);
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}
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/**
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* ap_qci_available(): Test if AP configuration
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* information can be queried via QCI subfunction.
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*
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* Returns 1 if subfunction PQAP(QCI) is available.
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*/
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static int ap_qci_available(void)
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{
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return test_facility(12);
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}
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/**
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* ap_apft_available(): Test if AP facilities test (APFT)
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* facility is available.
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*
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* Returns 1 if APFT is is available.
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*/
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static int ap_apft_available(void)
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{
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return test_facility(15);
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}
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/*
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* ap_qact_available(): Test if the PQAP(QACT) subfunction is available.
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*
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* Returns 1 if the QACT subfunction is available.
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*/
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static inline int ap_qact_available(void)
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{
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if (ap_qci_info)
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return ap_qci_info->qact;
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return 0;
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}
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/*
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* ap_fetch_qci_info(): Fetch cryptographic config info
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*
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* Returns the ap configuration info fetched via PQAP(QCI).
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* On success 0 is returned, on failure a negative errno
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* is returned, e.g. if the PQAP(QCI) instruction is not
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* available, the return value will be -EOPNOTSUPP.
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*/
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static inline int ap_fetch_qci_info(struct ap_config_info *info)
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{
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if (!ap_qci_available())
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return -EOPNOTSUPP;
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if (!info)
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return -EINVAL;
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return ap_qci(info);
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}
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/**
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* ap_init_qci_info(): Allocate and query qci config info.
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* Does also update the static variables ap_max_domain_id
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* and ap_max_adapter_id if this info is available.
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*/
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static void __init ap_init_qci_info(void)
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{
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if (!ap_qci_available()) {
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AP_DBF_INFO("%s QCI not supported\n", __func__);
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return;
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}
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ap_qci_info = kzalloc(sizeof(*ap_qci_info), GFP_KERNEL);
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if (!ap_qci_info)
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return;
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if (ap_fetch_qci_info(ap_qci_info) != 0) {
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kfree(ap_qci_info);
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ap_qci_info = NULL;
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return;
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}
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AP_DBF_INFO("%s successful fetched initial qci info\n", __func__);
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if (ap_qci_info->apxa) {
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if (ap_qci_info->Na) {
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ap_max_adapter_id = ap_qci_info->Na;
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AP_DBF_INFO("%s new ap_max_adapter_id is %d\n",
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__func__, ap_max_adapter_id);
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}
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if (ap_qci_info->Nd) {
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ap_max_domain_id = ap_qci_info->Nd;
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AP_DBF_INFO("%s new ap_max_domain_id is %d\n",
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__func__, ap_max_domain_id);
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}
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}
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}
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/*
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* ap_test_config(): helper function to extract the nrth bit
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* within the unsigned int array field.
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*/
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static inline int ap_test_config(unsigned int *field, unsigned int nr)
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{
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return ap_test_bit((field + (nr >> 5)), (nr & 0x1f));
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}
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/*
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* ap_test_config_card_id(): Test, whether an AP card ID is configured.
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*
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* Returns 0 if the card is not configured
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* 1 if the card is configured or
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* if the configuration information is not available
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*/
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static inline int ap_test_config_card_id(unsigned int id)
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{
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if (id > ap_max_adapter_id)
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return 0;
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if (ap_qci_info)
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return ap_test_config(ap_qci_info->apm, id);
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return 1;
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}
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/*
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* ap_test_config_usage_domain(): Test, whether an AP usage domain
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* is configured.
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*
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* Returns 0 if the usage domain is not configured
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* 1 if the usage domain is configured or
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* if the configuration information is not available
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*/
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int ap_test_config_usage_domain(unsigned int domain)
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{
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if (domain > ap_max_domain_id)
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return 0;
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if (ap_qci_info)
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return ap_test_config(ap_qci_info->aqm, domain);
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return 1;
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}
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EXPORT_SYMBOL(ap_test_config_usage_domain);
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/*
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* ap_test_config_ctrl_domain(): Test, whether an AP control domain
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* is configured.
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* @domain AP control domain ID
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*
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* Returns 1 if the control domain is configured
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* 0 in all other cases
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*/
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int ap_test_config_ctrl_domain(unsigned int domain)
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{
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if (!ap_qci_info || domain > ap_max_domain_id)
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return 0;
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return ap_test_config(ap_qci_info->adm, domain);
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}
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EXPORT_SYMBOL(ap_test_config_ctrl_domain);
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/*
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* ap_queue_info(): Check and get AP queue info.
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* Returns true if TAPQ succeeded and the info is filled or
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* false otherwise.
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*/
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static bool ap_queue_info(ap_qid_t qid, int *q_type, unsigned int *q_fac,
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int *q_depth, int *q_ml, bool *q_decfg)
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{
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struct ap_queue_status status;
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union {
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unsigned long value;
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struct {
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unsigned int fac : 32; /* facility bits */
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unsigned int at : 8; /* ap type */
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unsigned int _res1 : 8;
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unsigned int _res2 : 4;
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unsigned int ml : 4; /* apxl ml */
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unsigned int _res3 : 4;
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unsigned int qd : 4; /* queue depth */
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} tapq_gr2;
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} tapq_info;
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tapq_info.value = 0;
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/* make sure we don't run into a specifiation exception */
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if (AP_QID_CARD(qid) > ap_max_adapter_id ||
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AP_QID_QUEUE(qid) > ap_max_domain_id)
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return false;
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/* call TAPQ on this APQN */
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status = ap_test_queue(qid, ap_apft_available(), &tapq_info.value);
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switch (status.response_code) {
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case AP_RESPONSE_NORMAL:
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case AP_RESPONSE_RESET_IN_PROGRESS:
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case AP_RESPONSE_DECONFIGURED:
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case AP_RESPONSE_CHECKSTOPPED:
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case AP_RESPONSE_BUSY:
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/*
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* According to the architecture in all these cases the
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* info should be filled. All bits 0 is not possible as
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* there is at least one of the mode bits set.
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*/
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if (WARN_ON_ONCE(!tapq_info.value))
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return false;
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*q_type = tapq_info.tapq_gr2.at;
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*q_fac = tapq_info.tapq_gr2.fac;
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*q_depth = tapq_info.tapq_gr2.qd;
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*q_ml = tapq_info.tapq_gr2.ml;
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*q_decfg = status.response_code == AP_RESPONSE_DECONFIGURED;
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switch (*q_type) {
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/* For CEX2 and CEX3 the available functions
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* are not reflected by the facilities bits.
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* Instead it is coded into the type. So here
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* modify the function bits based on the type.
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*/
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case AP_DEVICE_TYPE_CEX2A:
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case AP_DEVICE_TYPE_CEX3A:
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*q_fac |= 0x08000000;
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break;
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case AP_DEVICE_TYPE_CEX2C:
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case AP_DEVICE_TYPE_CEX3C:
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*q_fac |= 0x10000000;
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break;
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default:
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break;
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}
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return true;
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default:
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/*
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* A response code which indicates, there is no info available.
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*/
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return false;
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}
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}
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void ap_wait(enum ap_sm_wait wait)
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{
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ktime_t hr_time;
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switch (wait) {
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case AP_SM_WAIT_AGAIN:
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case AP_SM_WAIT_INTERRUPT:
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if (ap_irq_flag)
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break;
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if (ap_poll_kthread) {
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wake_up(&ap_poll_wait);
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break;
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}
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fallthrough;
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case AP_SM_WAIT_TIMEOUT:
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spin_lock_bh(&ap_poll_timer_lock);
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if (!hrtimer_is_queued(&ap_poll_timer)) {
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hr_time = poll_timeout;
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hrtimer_forward_now(&ap_poll_timer, hr_time);
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hrtimer_restart(&ap_poll_timer);
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}
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spin_unlock_bh(&ap_poll_timer_lock);
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break;
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case AP_SM_WAIT_NONE:
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default:
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break;
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}
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}
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/**
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* ap_request_timeout(): Handling of request timeouts
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* @t: timer making this callback
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*
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* Handles request timeouts.
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*/
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void ap_request_timeout(struct timer_list *t)
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{
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struct ap_queue *aq = from_timer(aq, t, timeout);
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spin_lock_bh(&aq->lock);
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ap_wait(ap_sm_event(aq, AP_SM_EVENT_TIMEOUT));
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spin_unlock_bh(&aq->lock);
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}
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/**
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* ap_poll_timeout(): AP receive polling for finished AP requests.
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* @unused: Unused pointer.
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*
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* Schedules the AP tasklet using a high resolution timer.
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*/
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static enum hrtimer_restart ap_poll_timeout(struct hrtimer *unused)
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{
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tasklet_schedule(&ap_tasklet);
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return HRTIMER_NORESTART;
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}
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/**
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* ap_interrupt_handler() - Schedule ap_tasklet on interrupt
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* @airq: pointer to adapter interrupt descriptor
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* @floating: ignored
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*/
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static void ap_interrupt_handler(struct airq_struct *airq, bool floating)
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{
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inc_irq_stat(IRQIO_APB);
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tasklet_schedule(&ap_tasklet);
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}
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/**
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* ap_tasklet_fn(): Tasklet to poll all AP devices.
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* @dummy: Unused variable
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*
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* Poll all AP devices on the bus.
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*/
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static void ap_tasklet_fn(unsigned long dummy)
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{
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int bkt;
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struct ap_queue *aq;
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enum ap_sm_wait wait = AP_SM_WAIT_NONE;
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/* Reset the indicator if interrupts are used. Thus new interrupts can
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* be received. Doing it in the beginning of the tasklet is therefor
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* important that no requests on any AP get lost.
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*/
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if (ap_irq_flag)
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xchg(ap_airq.lsi_ptr, 0);
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spin_lock_bh(&ap_queues_lock);
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hash_for_each(ap_queues, bkt, aq, hnode) {
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spin_lock_bh(&aq->lock);
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wait = min(wait, ap_sm_event_loop(aq, AP_SM_EVENT_POLL));
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spin_unlock_bh(&aq->lock);
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}
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spin_unlock_bh(&ap_queues_lock);
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ap_wait(wait);
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}
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static int ap_pending_requests(void)
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{
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int bkt;
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struct ap_queue *aq;
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spin_lock_bh(&ap_queues_lock);
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hash_for_each(ap_queues, bkt, aq, hnode) {
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if (aq->queue_count == 0)
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continue;
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spin_unlock_bh(&ap_queues_lock);
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return 1;
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}
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spin_unlock_bh(&ap_queues_lock);
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return 0;
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}
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/**
|
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* ap_poll_thread(): Thread that polls for finished requests.
|
|
* @data: Unused pointer
|
|
*
|
|
* AP bus poll thread. The purpose of this thread is to poll for
|
|
* finished requests in a loop if there is a "free" cpu - that is
|
|
* a cpu that doesn't have anything better to do. The polling stops
|
|
* as soon as there is another task or if all messages have been
|
|
* delivered.
|
|
*/
|
|
static int ap_poll_thread(void *data)
|
|
{
|
|
DECLARE_WAITQUEUE(wait, current);
|
|
|
|
set_user_nice(current, MAX_NICE);
|
|
set_freezable();
|
|
while (!kthread_should_stop()) {
|
|
add_wait_queue(&ap_poll_wait, &wait);
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
if (!ap_pending_requests()) {
|
|
schedule();
|
|
try_to_freeze();
|
|
}
|
|
set_current_state(TASK_RUNNING);
|
|
remove_wait_queue(&ap_poll_wait, &wait);
|
|
if (need_resched()) {
|
|
schedule();
|
|
try_to_freeze();
|
|
continue;
|
|
}
|
|
ap_tasklet_fn(0);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ap_poll_thread_start(void)
|
|
{
|
|
int rc;
|
|
|
|
if (ap_irq_flag || ap_poll_kthread)
|
|
return 0;
|
|
mutex_lock(&ap_poll_thread_mutex);
|
|
ap_poll_kthread = kthread_run(ap_poll_thread, NULL, "appoll");
|
|
rc = PTR_ERR_OR_ZERO(ap_poll_kthread);
|
|
if (rc)
|
|
ap_poll_kthread = NULL;
|
|
mutex_unlock(&ap_poll_thread_mutex);
|
|
return rc;
|
|
}
|
|
|
|
static void ap_poll_thread_stop(void)
|
|
{
|
|
if (!ap_poll_kthread)
|
|
return;
|
|
mutex_lock(&ap_poll_thread_mutex);
|
|
kthread_stop(ap_poll_kthread);
|
|
ap_poll_kthread = NULL;
|
|
mutex_unlock(&ap_poll_thread_mutex);
|
|
}
|
|
|
|
#define is_card_dev(x) ((x)->parent == ap_root_device)
|
|
#define is_queue_dev(x) ((x)->parent != ap_root_device)
|
|
|
|
/**
|
|
* ap_bus_match()
|
|
* @dev: Pointer to device
|
|
* @drv: Pointer to device_driver
|
|
*
|
|
* AP bus driver registration/unregistration.
|
|
*/
|
|
static int ap_bus_match(struct device *dev, struct device_driver *drv)
|
|
{
|
|
struct ap_driver *ap_drv = to_ap_drv(drv);
|
|
struct ap_device_id *id;
|
|
|
|
/*
|
|
* Compare device type of the device with the list of
|
|
* supported types of the device_driver.
|
|
*/
|
|
for (id = ap_drv->ids; id->match_flags; id++) {
|
|
if (is_card_dev(dev) &&
|
|
id->match_flags & AP_DEVICE_ID_MATCH_CARD_TYPE &&
|
|
id->dev_type == to_ap_dev(dev)->device_type)
|
|
return 1;
|
|
if (is_queue_dev(dev) &&
|
|
id->match_flags & AP_DEVICE_ID_MATCH_QUEUE_TYPE &&
|
|
id->dev_type == to_ap_dev(dev)->device_type)
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ap_uevent(): Uevent function for AP devices.
|
|
* @dev: Pointer to device
|
|
* @env: Pointer to kobj_uevent_env
|
|
*
|
|
* It sets up a single environment variable DEV_TYPE which contains the
|
|
* hardware device type.
|
|
*/
|
|
static int ap_uevent(struct device *dev, struct kobj_uevent_env *env)
|
|
{
|
|
int rc = 0;
|
|
struct ap_device *ap_dev = to_ap_dev(dev);
|
|
|
|
/* Uevents from ap bus core don't need extensions to the env */
|
|
if (dev == ap_root_device)
|
|
return 0;
|
|
|
|
if (is_card_dev(dev)) {
|
|
struct ap_card *ac = to_ap_card(&ap_dev->device);
|
|
|
|
/* Set up DEV_TYPE environment variable. */
|
|
rc = add_uevent_var(env, "DEV_TYPE=%04X", ap_dev->device_type);
|
|
if (rc)
|
|
return rc;
|
|
/* Add MODALIAS= */
|
|
rc = add_uevent_var(env, "MODALIAS=ap:t%02X", ap_dev->device_type);
|
|
if (rc)
|
|
return rc;
|
|
|
|
/* Add MODE=<accel|cca|ep11> */
|
|
if (ap_test_bit(&ac->functions, AP_FUNC_ACCEL))
|
|
rc = add_uevent_var(env, "MODE=accel");
|
|
else if (ap_test_bit(&ac->functions, AP_FUNC_COPRO))
|
|
rc = add_uevent_var(env, "MODE=cca");
|
|
else if (ap_test_bit(&ac->functions, AP_FUNC_EP11))
|
|
rc = add_uevent_var(env, "MODE=ep11");
|
|
if (rc)
|
|
return rc;
|
|
} else {
|
|
struct ap_queue *aq = to_ap_queue(&ap_dev->device);
|
|
|
|
/* Add MODE=<accel|cca|ep11> */
|
|
if (ap_test_bit(&aq->card->functions, AP_FUNC_ACCEL))
|
|
rc = add_uevent_var(env, "MODE=accel");
|
|
else if (ap_test_bit(&aq->card->functions, AP_FUNC_COPRO))
|
|
rc = add_uevent_var(env, "MODE=cca");
|
|
else if (ap_test_bit(&aq->card->functions, AP_FUNC_EP11))
|
|
rc = add_uevent_var(env, "MODE=ep11");
|
|
if (rc)
|
|
return rc;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ap_send_init_scan_done_uevent(void)
|
|
{
|
|
char *envp[] = { "INITSCAN=done", NULL };
|
|
|
|
kobject_uevent_env(&ap_root_device->kobj, KOBJ_CHANGE, envp);
|
|
}
|
|
|
|
static void ap_send_bindings_complete_uevent(void)
|
|
{
|
|
char buf[32];
|
|
char *envp[] = { "BINDINGS=complete", buf, NULL };
|
|
|
|
snprintf(buf, sizeof(buf), "COMPLETECOUNT=%llu",
|
|
atomic64_inc_return(&ap_bindings_complete_count));
|
|
kobject_uevent_env(&ap_root_device->kobj, KOBJ_CHANGE, envp);
|
|
}
|
|
|
|
void ap_send_config_uevent(struct ap_device *ap_dev, bool cfg)
|
|
{
|
|
char buf[16];
|
|
char *envp[] = { buf, NULL };
|
|
|
|
snprintf(buf, sizeof(buf), "CONFIG=%d", cfg ? 1 : 0);
|
|
|
|
kobject_uevent_env(&ap_dev->device.kobj, KOBJ_CHANGE, envp);
|
|
}
|
|
EXPORT_SYMBOL(ap_send_config_uevent);
|
|
|
|
void ap_send_online_uevent(struct ap_device *ap_dev, int online)
|
|
{
|
|
char buf[16];
|
|
char *envp[] = { buf, NULL };
|
|
|
|
snprintf(buf, sizeof(buf), "ONLINE=%d", online ? 1 : 0);
|
|
|
|
kobject_uevent_env(&ap_dev->device.kobj, KOBJ_CHANGE, envp);
|
|
}
|
|
EXPORT_SYMBOL(ap_send_online_uevent);
|
|
|
|
/*
|
|
* calc # of bound APQNs
|
|
*/
|
|
|
|
struct __ap_calc_ctrs {
|
|
unsigned int apqns;
|
|
unsigned int bound;
|
|
};
|
|
|
|
static int __ap_calc_helper(struct device *dev, void *arg)
|
|
{
|
|
struct __ap_calc_ctrs *pctrs = (struct __ap_calc_ctrs *) arg;
|
|
|
|
if (is_queue_dev(dev)) {
|
|
pctrs->apqns++;
|
|
if (dev->driver)
|
|
pctrs->bound++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ap_calc_bound_apqns(unsigned int *apqns, unsigned int *bound)
|
|
{
|
|
struct __ap_calc_ctrs ctrs;
|
|
|
|
memset(&ctrs, 0, sizeof(ctrs));
|
|
bus_for_each_dev(&ap_bus_type, NULL, (void *) &ctrs, __ap_calc_helper);
|
|
|
|
*apqns = ctrs.apqns;
|
|
*bound = ctrs.bound;
|
|
}
|
|
|
|
/*
|
|
* After initial ap bus scan do check if all existing APQNs are
|
|
* bound to device drivers.
|
|
*/
|
|
static void ap_check_bindings_complete(void)
|
|
{
|
|
unsigned int apqns, bound;
|
|
|
|
if (atomic64_read(&ap_scan_bus_count) >= 1) {
|
|
ap_calc_bound_apqns(&apqns, &bound);
|
|
if (bound == apqns) {
|
|
if (!completion_done(&ap_init_apqn_bindings_complete)) {
|
|
complete_all(&ap_init_apqn_bindings_complete);
|
|
AP_DBF_INFO("%s complete\n", __func__);
|
|
}
|
|
ap_send_bindings_complete_uevent();
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Interface to wait for the AP bus to have done one initial ap bus
|
|
* scan and all detected APQNs have been bound to device drivers.
|
|
* If these both conditions are not fulfilled, this function blocks
|
|
* on a condition with wait_for_completion_interruptible_timeout().
|
|
* If these both conditions are fulfilled (before the timeout hits)
|
|
* the return value is 0. If the timeout (in jiffies) hits instead
|
|
* -ETIME is returned. On failures negative return values are
|
|
* returned to the caller.
|
|
*/
|
|
int ap_wait_init_apqn_bindings_complete(unsigned long timeout)
|
|
{
|
|
long l;
|
|
|
|
if (completion_done(&ap_init_apqn_bindings_complete))
|
|
return 0;
|
|
|
|
if (timeout)
|
|
l = wait_for_completion_interruptible_timeout(
|
|
&ap_init_apqn_bindings_complete, timeout);
|
|
else
|
|
l = wait_for_completion_interruptible(
|
|
&ap_init_apqn_bindings_complete);
|
|
if (l < 0)
|
|
return l == -ERESTARTSYS ? -EINTR : l;
|
|
else if (l == 0 && timeout)
|
|
return -ETIME;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ap_wait_init_apqn_bindings_complete);
|
|
|
|
static int __ap_queue_devices_with_id_unregister(struct device *dev, void *data)
|
|
{
|
|
if (is_queue_dev(dev) &&
|
|
AP_QID_CARD(to_ap_queue(dev)->qid) == (int)(long) data)
|
|
device_unregister(dev);
|
|
return 0;
|
|
}
|
|
|
|
static int __ap_revise_reserved(struct device *dev, void *dummy)
|
|
{
|
|
int rc, card, queue, devres, drvres;
|
|
|
|
if (is_queue_dev(dev)) {
|
|
card = AP_QID_CARD(to_ap_queue(dev)->qid);
|
|
queue = AP_QID_QUEUE(to_ap_queue(dev)->qid);
|
|
mutex_lock(&ap_perms_mutex);
|
|
devres = test_bit_inv(card, ap_perms.apm)
|
|
&& test_bit_inv(queue, ap_perms.aqm);
|
|
mutex_unlock(&ap_perms_mutex);
|
|
drvres = to_ap_drv(dev->driver)->flags
|
|
& AP_DRIVER_FLAG_DEFAULT;
|
|
if (!!devres != !!drvres) {
|
|
AP_DBF_DBG("%s reprobing queue=%02x.%04x\n",
|
|
__func__, card, queue);
|
|
rc = device_reprobe(dev);
|
|
if (rc)
|
|
AP_DBF_WARN("%s reprobing queue=%02x.%04x failed\n",
|
|
__func__, card, queue);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ap_bus_revise_bindings(void)
|
|
{
|
|
bus_for_each_dev(&ap_bus_type, NULL, NULL, __ap_revise_reserved);
|
|
}
|
|
|
|
int ap_owned_by_def_drv(int card, int queue)
|
|
{
|
|
int rc = 0;
|
|
|
|
if (card < 0 || card >= AP_DEVICES || queue < 0 || queue >= AP_DOMAINS)
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&ap_perms_mutex);
|
|
|
|
if (test_bit_inv(card, ap_perms.apm)
|
|
&& test_bit_inv(queue, ap_perms.aqm))
|
|
rc = 1;
|
|
|
|
mutex_unlock(&ap_perms_mutex);
|
|
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL(ap_owned_by_def_drv);
|
|
|
|
int ap_apqn_in_matrix_owned_by_def_drv(unsigned long *apm,
|
|
unsigned long *aqm)
|
|
{
|
|
int card, queue, rc = 0;
|
|
|
|
mutex_lock(&ap_perms_mutex);
|
|
|
|
for (card = 0; !rc && card < AP_DEVICES; card++)
|
|
if (test_bit_inv(card, apm) &&
|
|
test_bit_inv(card, ap_perms.apm))
|
|
for (queue = 0; !rc && queue < AP_DOMAINS; queue++)
|
|
if (test_bit_inv(queue, aqm) &&
|
|
test_bit_inv(queue, ap_perms.aqm))
|
|
rc = 1;
|
|
|
|
mutex_unlock(&ap_perms_mutex);
|
|
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL(ap_apqn_in_matrix_owned_by_def_drv);
|
|
|
|
static int ap_device_probe(struct device *dev)
|
|
{
|
|
struct ap_device *ap_dev = to_ap_dev(dev);
|
|
struct ap_driver *ap_drv = to_ap_drv(dev->driver);
|
|
int card, queue, devres, drvres, rc = -ENODEV;
|
|
|
|
if (!get_device(dev))
|
|
return rc;
|
|
|
|
if (is_queue_dev(dev)) {
|
|
/*
|
|
* If the apqn is marked as reserved/used by ap bus and
|
|
* default drivers, only probe with drivers with the default
|
|
* flag set. If it is not marked, only probe with drivers
|
|
* with the default flag not set.
|
|
*/
|
|
card = AP_QID_CARD(to_ap_queue(dev)->qid);
|
|
queue = AP_QID_QUEUE(to_ap_queue(dev)->qid);
|
|
mutex_lock(&ap_perms_mutex);
|
|
devres = test_bit_inv(card, ap_perms.apm)
|
|
&& test_bit_inv(queue, ap_perms.aqm);
|
|
mutex_unlock(&ap_perms_mutex);
|
|
drvres = ap_drv->flags & AP_DRIVER_FLAG_DEFAULT;
|
|
if (!!devres != !!drvres)
|
|
goto out;
|
|
}
|
|
|
|
/* Add queue/card to list of active queues/cards */
|
|
spin_lock_bh(&ap_queues_lock);
|
|
if (is_queue_dev(dev))
|
|
hash_add(ap_queues, &to_ap_queue(dev)->hnode,
|
|
to_ap_queue(dev)->qid);
|
|
spin_unlock_bh(&ap_queues_lock);
|
|
|
|
rc = ap_drv->probe ? ap_drv->probe(ap_dev) : -ENODEV;
|
|
|
|
if (rc) {
|
|
spin_lock_bh(&ap_queues_lock);
|
|
if (is_queue_dev(dev))
|
|
hash_del(&to_ap_queue(dev)->hnode);
|
|
spin_unlock_bh(&ap_queues_lock);
|
|
} else
|
|
ap_check_bindings_complete();
|
|
|
|
out:
|
|
if (rc)
|
|
put_device(dev);
|
|
return rc;
|
|
}
|
|
|
|
static void ap_device_remove(struct device *dev)
|
|
{
|
|
struct ap_device *ap_dev = to_ap_dev(dev);
|
|
struct ap_driver *ap_drv = to_ap_drv(dev->driver);
|
|
|
|
/* prepare ap queue device removal */
|
|
if (is_queue_dev(dev))
|
|
ap_queue_prepare_remove(to_ap_queue(dev));
|
|
|
|
/* driver's chance to clean up gracefully */
|
|
if (ap_drv->remove)
|
|
ap_drv->remove(ap_dev);
|
|
|
|
/* now do the ap queue device remove */
|
|
if (is_queue_dev(dev))
|
|
ap_queue_remove(to_ap_queue(dev));
|
|
|
|
/* Remove queue/card from list of active queues/cards */
|
|
spin_lock_bh(&ap_queues_lock);
|
|
if (is_queue_dev(dev))
|
|
hash_del(&to_ap_queue(dev)->hnode);
|
|
spin_unlock_bh(&ap_queues_lock);
|
|
|
|
put_device(dev);
|
|
}
|
|
|
|
struct ap_queue *ap_get_qdev(ap_qid_t qid)
|
|
{
|
|
int bkt;
|
|
struct ap_queue *aq;
|
|
|
|
spin_lock_bh(&ap_queues_lock);
|
|
hash_for_each(ap_queues, bkt, aq, hnode) {
|
|
if (aq->qid == qid) {
|
|
get_device(&aq->ap_dev.device);
|
|
spin_unlock_bh(&ap_queues_lock);
|
|
return aq;
|
|
}
|
|
}
|
|
spin_unlock_bh(&ap_queues_lock);
|
|
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL(ap_get_qdev);
|
|
|
|
int ap_driver_register(struct ap_driver *ap_drv, struct module *owner,
|
|
char *name)
|
|
{
|
|
struct device_driver *drv = &ap_drv->driver;
|
|
|
|
drv->bus = &ap_bus_type;
|
|
drv->owner = owner;
|
|
drv->name = name;
|
|
return driver_register(drv);
|
|
}
|
|
EXPORT_SYMBOL(ap_driver_register);
|
|
|
|
void ap_driver_unregister(struct ap_driver *ap_drv)
|
|
{
|
|
driver_unregister(&ap_drv->driver);
|
|
}
|
|
EXPORT_SYMBOL(ap_driver_unregister);
|
|
|
|
void ap_bus_force_rescan(void)
|
|
{
|
|
/* processing a asynchronous bus rescan */
|
|
del_timer(&ap_config_timer);
|
|
queue_work(system_long_wq, &ap_scan_work);
|
|
flush_work(&ap_scan_work);
|
|
}
|
|
EXPORT_SYMBOL(ap_bus_force_rescan);
|
|
|
|
/*
|
|
* A config change has happened, force an ap bus rescan.
|
|
*/
|
|
void ap_bus_cfg_chg(void)
|
|
{
|
|
AP_DBF_DBG("%s config change, forcing bus rescan\n", __func__);
|
|
|
|
ap_bus_force_rescan();
|
|
}
|
|
|
|
/*
|
|
* hex2bitmap() - parse hex mask string and set bitmap.
|
|
* Valid strings are "0x012345678" with at least one valid hex number.
|
|
* Rest of the bitmap to the right is padded with 0. No spaces allowed
|
|
* within the string, the leading 0x may be omitted.
|
|
* Returns the bitmask with exactly the bits set as given by the hex
|
|
* string (both in big endian order).
|
|
*/
|
|
static int hex2bitmap(const char *str, unsigned long *bitmap, int bits)
|
|
{
|
|
int i, n, b;
|
|
|
|
/* bits needs to be a multiple of 8 */
|
|
if (bits & 0x07)
|
|
return -EINVAL;
|
|
|
|
if (str[0] == '0' && str[1] == 'x')
|
|
str++;
|
|
if (*str == 'x')
|
|
str++;
|
|
|
|
for (i = 0; isxdigit(*str) && i < bits; str++) {
|
|
b = hex_to_bin(*str);
|
|
for (n = 0; n < 4; n++)
|
|
if (b & (0x08 >> n))
|
|
set_bit_inv(i + n, bitmap);
|
|
i += 4;
|
|
}
|
|
|
|
if (*str == '\n')
|
|
str++;
|
|
if (*str)
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* modify_bitmap() - parse bitmask argument and modify an existing
|
|
* bit mask accordingly. A concatenation (done with ',') of these
|
|
* terms is recognized:
|
|
* +<bitnr>[-<bitnr>] or -<bitnr>[-<bitnr>]
|
|
* <bitnr> may be any valid number (hex, decimal or octal) in the range
|
|
* 0...bits-1; the leading + or - is required. Here are some examples:
|
|
* +0-15,+32,-128,-0xFF
|
|
* -0-255,+1-16,+0x128
|
|
* +1,+2,+3,+4,-5,-7-10
|
|
* Returns the new bitmap after all changes have been applied. Every
|
|
* positive value in the string will set a bit and every negative value
|
|
* in the string will clear a bit. As a bit may be touched more than once,
|
|
* the last 'operation' wins:
|
|
* +0-255,-128 = first bits 0-255 will be set, then bit 128 will be
|
|
* cleared again. All other bits are unmodified.
|
|
*/
|
|
static int modify_bitmap(const char *str, unsigned long *bitmap, int bits)
|
|
{
|
|
int a, i, z;
|
|
char *np, sign;
|
|
|
|
/* bits needs to be a multiple of 8 */
|
|
if (bits & 0x07)
|
|
return -EINVAL;
|
|
|
|
while (*str) {
|
|
sign = *str++;
|
|
if (sign != '+' && sign != '-')
|
|
return -EINVAL;
|
|
a = z = simple_strtoul(str, &np, 0);
|
|
if (str == np || a >= bits)
|
|
return -EINVAL;
|
|
str = np;
|
|
if (*str == '-') {
|
|
z = simple_strtoul(++str, &np, 0);
|
|
if (str == np || a > z || z >= bits)
|
|
return -EINVAL;
|
|
str = np;
|
|
}
|
|
for (i = a; i <= z; i++)
|
|
if (sign == '+')
|
|
set_bit_inv(i, bitmap);
|
|
else
|
|
clear_bit_inv(i, bitmap);
|
|
while (*str == ',' || *str == '\n')
|
|
str++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ap_parse_mask_str(const char *str,
|
|
unsigned long *bitmap, int bits,
|
|
struct mutex *lock)
|
|
{
|
|
unsigned long *newmap, size;
|
|
int rc;
|
|
|
|
/* bits needs to be a multiple of 8 */
|
|
if (bits & 0x07)
|
|
return -EINVAL;
|
|
|
|
size = BITS_TO_LONGS(bits)*sizeof(unsigned long);
|
|
newmap = kmalloc(size, GFP_KERNEL);
|
|
if (!newmap)
|
|
return -ENOMEM;
|
|
if (mutex_lock_interruptible(lock)) {
|
|
kfree(newmap);
|
|
return -ERESTARTSYS;
|
|
}
|
|
|
|
if (*str == '+' || *str == '-') {
|
|
memcpy(newmap, bitmap, size);
|
|
rc = modify_bitmap(str, newmap, bits);
|
|
} else {
|
|
memset(newmap, 0, size);
|
|
rc = hex2bitmap(str, newmap, bits);
|
|
}
|
|
if (rc == 0)
|
|
memcpy(bitmap, newmap, size);
|
|
mutex_unlock(lock);
|
|
kfree(newmap);
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL(ap_parse_mask_str);
|
|
|
|
/*
|
|
* AP bus attributes.
|
|
*/
|
|
|
|
static ssize_t ap_domain_show(struct bus_type *bus, char *buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", ap_domain_index);
|
|
}
|
|
|
|
static ssize_t ap_domain_store(struct bus_type *bus,
|
|
const char *buf, size_t count)
|
|
{
|
|
int domain;
|
|
|
|
if (sscanf(buf, "%i\n", &domain) != 1 ||
|
|
domain < 0 || domain > ap_max_domain_id ||
|
|
!test_bit_inv(domain, ap_perms.aqm))
|
|
return -EINVAL;
|
|
|
|
spin_lock_bh(&ap_domain_lock);
|
|
ap_domain_index = domain;
|
|
spin_unlock_bh(&ap_domain_lock);
|
|
|
|
AP_DBF_INFO("%s stored new default domain=%d\n",
|
|
__func__, domain);
|
|
|
|
return count;
|
|
}
|
|
|
|
static BUS_ATTR_RW(ap_domain);
|
|
|
|
static ssize_t ap_control_domain_mask_show(struct bus_type *bus, char *buf)
|
|
{
|
|
if (!ap_qci_info) /* QCI not supported */
|
|
return scnprintf(buf, PAGE_SIZE, "not supported\n");
|
|
|
|
return scnprintf(buf, PAGE_SIZE,
|
|
"0x%08x%08x%08x%08x%08x%08x%08x%08x\n",
|
|
ap_qci_info->adm[0], ap_qci_info->adm[1],
|
|
ap_qci_info->adm[2], ap_qci_info->adm[3],
|
|
ap_qci_info->adm[4], ap_qci_info->adm[5],
|
|
ap_qci_info->adm[6], ap_qci_info->adm[7]);
|
|
}
|
|
|
|
static BUS_ATTR_RO(ap_control_domain_mask);
|
|
|
|
static ssize_t ap_usage_domain_mask_show(struct bus_type *bus, char *buf)
|
|
{
|
|
if (!ap_qci_info) /* QCI not supported */
|
|
return scnprintf(buf, PAGE_SIZE, "not supported\n");
|
|
|
|
return scnprintf(buf, PAGE_SIZE,
|
|
"0x%08x%08x%08x%08x%08x%08x%08x%08x\n",
|
|
ap_qci_info->aqm[0], ap_qci_info->aqm[1],
|
|
ap_qci_info->aqm[2], ap_qci_info->aqm[3],
|
|
ap_qci_info->aqm[4], ap_qci_info->aqm[5],
|
|
ap_qci_info->aqm[6], ap_qci_info->aqm[7]);
|
|
}
|
|
|
|
static BUS_ATTR_RO(ap_usage_domain_mask);
|
|
|
|
static ssize_t ap_adapter_mask_show(struct bus_type *bus, char *buf)
|
|
{
|
|
if (!ap_qci_info) /* QCI not supported */
|
|
return scnprintf(buf, PAGE_SIZE, "not supported\n");
|
|
|
|
return scnprintf(buf, PAGE_SIZE,
|
|
"0x%08x%08x%08x%08x%08x%08x%08x%08x\n",
|
|
ap_qci_info->apm[0], ap_qci_info->apm[1],
|
|
ap_qci_info->apm[2], ap_qci_info->apm[3],
|
|
ap_qci_info->apm[4], ap_qci_info->apm[5],
|
|
ap_qci_info->apm[6], ap_qci_info->apm[7]);
|
|
}
|
|
|
|
static BUS_ATTR_RO(ap_adapter_mask);
|
|
|
|
static ssize_t ap_interrupts_show(struct bus_type *bus, char *buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n",
|
|
ap_irq_flag ? 1 : 0);
|
|
}
|
|
|
|
static BUS_ATTR_RO(ap_interrupts);
|
|
|
|
static ssize_t config_time_show(struct bus_type *bus, char *buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", ap_config_time);
|
|
}
|
|
|
|
static ssize_t config_time_store(struct bus_type *bus,
|
|
const char *buf, size_t count)
|
|
{
|
|
int time;
|
|
|
|
if (sscanf(buf, "%d\n", &time) != 1 || time < 5 || time > 120)
|
|
return -EINVAL;
|
|
ap_config_time = time;
|
|
mod_timer(&ap_config_timer, jiffies + ap_config_time * HZ);
|
|
return count;
|
|
}
|
|
|
|
static BUS_ATTR_RW(config_time);
|
|
|
|
static ssize_t poll_thread_show(struct bus_type *bus, char *buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", ap_poll_kthread ? 1 : 0);
|
|
}
|
|
|
|
static ssize_t poll_thread_store(struct bus_type *bus,
|
|
const char *buf, size_t count)
|
|
{
|
|
int flag, rc;
|
|
|
|
if (sscanf(buf, "%d\n", &flag) != 1)
|
|
return -EINVAL;
|
|
if (flag) {
|
|
rc = ap_poll_thread_start();
|
|
if (rc)
|
|
count = rc;
|
|
} else
|
|
ap_poll_thread_stop();
|
|
return count;
|
|
}
|
|
|
|
static BUS_ATTR_RW(poll_thread);
|
|
|
|
static ssize_t poll_timeout_show(struct bus_type *bus, char *buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%llu\n", poll_timeout);
|
|
}
|
|
|
|
static ssize_t poll_timeout_store(struct bus_type *bus, const char *buf,
|
|
size_t count)
|
|
{
|
|
unsigned long long time;
|
|
ktime_t hr_time;
|
|
|
|
/* 120 seconds = maximum poll interval */
|
|
if (sscanf(buf, "%llu\n", &time) != 1 || time < 1 ||
|
|
time > 120000000000ULL)
|
|
return -EINVAL;
|
|
poll_timeout = time;
|
|
hr_time = poll_timeout;
|
|
|
|
spin_lock_bh(&ap_poll_timer_lock);
|
|
hrtimer_cancel(&ap_poll_timer);
|
|
hrtimer_set_expires(&ap_poll_timer, hr_time);
|
|
hrtimer_start_expires(&ap_poll_timer, HRTIMER_MODE_ABS);
|
|
spin_unlock_bh(&ap_poll_timer_lock);
|
|
|
|
return count;
|
|
}
|
|
|
|
static BUS_ATTR_RW(poll_timeout);
|
|
|
|
static ssize_t ap_max_domain_id_show(struct bus_type *bus, char *buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", ap_max_domain_id);
|
|
}
|
|
|
|
static BUS_ATTR_RO(ap_max_domain_id);
|
|
|
|
static ssize_t ap_max_adapter_id_show(struct bus_type *bus, char *buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%d\n", ap_max_adapter_id);
|
|
}
|
|
|
|
static BUS_ATTR_RO(ap_max_adapter_id);
|
|
|
|
static ssize_t apmask_show(struct bus_type *bus, char *buf)
|
|
{
|
|
int rc;
|
|
|
|
if (mutex_lock_interruptible(&ap_perms_mutex))
|
|
return -ERESTARTSYS;
|
|
rc = scnprintf(buf, PAGE_SIZE,
|
|
"0x%016lx%016lx%016lx%016lx\n",
|
|
ap_perms.apm[0], ap_perms.apm[1],
|
|
ap_perms.apm[2], ap_perms.apm[3]);
|
|
mutex_unlock(&ap_perms_mutex);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static ssize_t apmask_store(struct bus_type *bus, const char *buf,
|
|
size_t count)
|
|
{
|
|
int rc;
|
|
|
|
rc = ap_parse_mask_str(buf, ap_perms.apm, AP_DEVICES, &ap_perms_mutex);
|
|
if (rc)
|
|
return rc;
|
|
|
|
ap_bus_revise_bindings();
|
|
|
|
return count;
|
|
}
|
|
|
|
static BUS_ATTR_RW(apmask);
|
|
|
|
static ssize_t aqmask_show(struct bus_type *bus, char *buf)
|
|
{
|
|
int rc;
|
|
|
|
if (mutex_lock_interruptible(&ap_perms_mutex))
|
|
return -ERESTARTSYS;
|
|
rc = scnprintf(buf, PAGE_SIZE,
|
|
"0x%016lx%016lx%016lx%016lx\n",
|
|
ap_perms.aqm[0], ap_perms.aqm[1],
|
|
ap_perms.aqm[2], ap_perms.aqm[3]);
|
|
mutex_unlock(&ap_perms_mutex);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static ssize_t aqmask_store(struct bus_type *bus, const char *buf,
|
|
size_t count)
|
|
{
|
|
int rc;
|
|
|
|
rc = ap_parse_mask_str(buf, ap_perms.aqm, AP_DOMAINS, &ap_perms_mutex);
|
|
if (rc)
|
|
return rc;
|
|
|
|
ap_bus_revise_bindings();
|
|
|
|
return count;
|
|
}
|
|
|
|
static BUS_ATTR_RW(aqmask);
|
|
|
|
static ssize_t scans_show(struct bus_type *bus, char *buf)
|
|
{
|
|
return scnprintf(buf, PAGE_SIZE, "%llu\n",
|
|
atomic64_read(&ap_scan_bus_count));
|
|
}
|
|
|
|
static BUS_ATTR_RO(scans);
|
|
|
|
static ssize_t bindings_show(struct bus_type *bus, char *buf)
|
|
{
|
|
int rc;
|
|
unsigned int apqns, n;
|
|
|
|
ap_calc_bound_apqns(&apqns, &n);
|
|
if (atomic64_read(&ap_scan_bus_count) >= 1 && n == apqns)
|
|
rc = scnprintf(buf, PAGE_SIZE, "%u/%u (complete)\n", n, apqns);
|
|
else
|
|
rc = scnprintf(buf, PAGE_SIZE, "%u/%u\n", n, apqns);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static BUS_ATTR_RO(bindings);
|
|
|
|
static struct attribute *ap_bus_attrs[] = {
|
|
&bus_attr_ap_domain.attr,
|
|
&bus_attr_ap_control_domain_mask.attr,
|
|
&bus_attr_ap_usage_domain_mask.attr,
|
|
&bus_attr_ap_adapter_mask.attr,
|
|
&bus_attr_config_time.attr,
|
|
&bus_attr_poll_thread.attr,
|
|
&bus_attr_ap_interrupts.attr,
|
|
&bus_attr_poll_timeout.attr,
|
|
&bus_attr_ap_max_domain_id.attr,
|
|
&bus_attr_ap_max_adapter_id.attr,
|
|
&bus_attr_apmask.attr,
|
|
&bus_attr_aqmask.attr,
|
|
&bus_attr_scans.attr,
|
|
&bus_attr_bindings.attr,
|
|
NULL,
|
|
};
|
|
ATTRIBUTE_GROUPS(ap_bus);
|
|
|
|
static struct bus_type ap_bus_type = {
|
|
.name = "ap",
|
|
.bus_groups = ap_bus_groups,
|
|
.match = &ap_bus_match,
|
|
.uevent = &ap_uevent,
|
|
.probe = ap_device_probe,
|
|
.remove = ap_device_remove,
|
|
};
|
|
|
|
/**
|
|
* ap_select_domain(): Select an AP domain if possible and we haven't
|
|
* already done so before.
|
|
*/
|
|
static void ap_select_domain(void)
|
|
{
|
|
struct ap_queue_status status;
|
|
int card, dom;
|
|
|
|
/*
|
|
* Choose the default domain. Either the one specified with
|
|
* the "domain=" parameter or the first domain with at least
|
|
* one valid APQN.
|
|
*/
|
|
spin_lock_bh(&ap_domain_lock);
|
|
if (ap_domain_index >= 0) {
|
|
/* Domain has already been selected. */
|
|
goto out;
|
|
}
|
|
for (dom = 0; dom <= ap_max_domain_id; dom++) {
|
|
if (!ap_test_config_usage_domain(dom) ||
|
|
!test_bit_inv(dom, ap_perms.aqm))
|
|
continue;
|
|
for (card = 0; card <= ap_max_adapter_id; card++) {
|
|
if (!ap_test_config_card_id(card) ||
|
|
!test_bit_inv(card, ap_perms.apm))
|
|
continue;
|
|
status = ap_test_queue(AP_MKQID(card, dom),
|
|
ap_apft_available(),
|
|
NULL);
|
|
if (status.response_code == AP_RESPONSE_NORMAL)
|
|
break;
|
|
}
|
|
if (card <= ap_max_adapter_id)
|
|
break;
|
|
}
|
|
if (dom <= ap_max_domain_id) {
|
|
ap_domain_index = dom;
|
|
AP_DBF_INFO("%s new default domain is %d\n",
|
|
__func__, ap_domain_index);
|
|
}
|
|
out:
|
|
spin_unlock_bh(&ap_domain_lock);
|
|
}
|
|
|
|
/*
|
|
* This function checks the type and returns either 0 for not
|
|
* supported or the highest compatible type value (which may
|
|
* include the input type value).
|
|
*/
|
|
static int ap_get_compatible_type(ap_qid_t qid, int rawtype, unsigned int func)
|
|
{
|
|
int comp_type = 0;
|
|
|
|
/* < CEX2A is not supported */
|
|
if (rawtype < AP_DEVICE_TYPE_CEX2A) {
|
|
AP_DBF_WARN("%s queue=%02x.%04x unsupported type %d\n",
|
|
__func__, AP_QID_CARD(qid),
|
|
AP_QID_QUEUE(qid), rawtype);
|
|
return 0;
|
|
}
|
|
/* up to CEX7 known and fully supported */
|
|
if (rawtype <= AP_DEVICE_TYPE_CEX7)
|
|
return rawtype;
|
|
/*
|
|
* unknown new type > CEX7, check for compatibility
|
|
* to the highest known and supported type which is
|
|
* currently CEX7 with the help of the QACT function.
|
|
*/
|
|
if (ap_qact_available()) {
|
|
struct ap_queue_status status;
|
|
union ap_qact_ap_info apinfo = {0};
|
|
|
|
apinfo.mode = (func >> 26) & 0x07;
|
|
apinfo.cat = AP_DEVICE_TYPE_CEX7;
|
|
status = ap_qact(qid, 0, &apinfo);
|
|
if (status.response_code == AP_RESPONSE_NORMAL
|
|
&& apinfo.cat >= AP_DEVICE_TYPE_CEX2A
|
|
&& apinfo.cat <= AP_DEVICE_TYPE_CEX7)
|
|
comp_type = apinfo.cat;
|
|
}
|
|
if (!comp_type)
|
|
AP_DBF_WARN("%s queue=%02x.%04x unable to map type %d\n",
|
|
__func__, AP_QID_CARD(qid),
|
|
AP_QID_QUEUE(qid), rawtype);
|
|
else if (comp_type != rawtype)
|
|
AP_DBF_INFO("%s queue=%02x.%04x map type %d to %d\n",
|
|
__func__, AP_QID_CARD(qid), AP_QID_QUEUE(qid),
|
|
rawtype, comp_type);
|
|
return comp_type;
|
|
}
|
|
|
|
/*
|
|
* Helper function to be used with bus_find_dev
|
|
* matches for the card device with the given id
|
|
*/
|
|
static int __match_card_device_with_id(struct device *dev, const void *data)
|
|
{
|
|
return is_card_dev(dev) && to_ap_card(dev)->id == (int)(long)(void *) data;
|
|
}
|
|
|
|
/*
|
|
* Helper function to be used with bus_find_dev
|
|
* matches for the queue device with a given qid
|
|
*/
|
|
static int __match_queue_device_with_qid(struct device *dev, const void *data)
|
|
{
|
|
return is_queue_dev(dev) && to_ap_queue(dev)->qid == (int)(long) data;
|
|
}
|
|
|
|
/*
|
|
* Helper function to be used with bus_find_dev
|
|
* matches any queue device with given queue id
|
|
*/
|
|
static int __match_queue_device_with_queue_id(struct device *dev, const void *data)
|
|
{
|
|
return is_queue_dev(dev)
|
|
&& AP_QID_QUEUE(to_ap_queue(dev)->qid) == (int)(long) data;
|
|
}
|
|
|
|
/*
|
|
* Helper function for ap_scan_bus().
|
|
* Remove card device and associated queue devices.
|
|
*/
|
|
static inline void ap_scan_rm_card_dev_and_queue_devs(struct ap_card *ac)
|
|
{
|
|
bus_for_each_dev(&ap_bus_type, NULL,
|
|
(void *)(long) ac->id,
|
|
__ap_queue_devices_with_id_unregister);
|
|
device_unregister(&ac->ap_dev.device);
|
|
}
|
|
|
|
/*
|
|
* Helper function for ap_scan_bus().
|
|
* Does the scan bus job for all the domains within
|
|
* a valid adapter given by an ap_card ptr.
|
|
*/
|
|
static inline void ap_scan_domains(struct ap_card *ac)
|
|
{
|
|
bool decfg;
|
|
ap_qid_t qid;
|
|
unsigned int func;
|
|
struct device *dev;
|
|
struct ap_queue *aq;
|
|
int rc, dom, depth, type, ml;
|
|
|
|
/*
|
|
* Go through the configuration for the domains and compare them
|
|
* to the existing queue devices. Also take care of the config
|
|
* and error state for the queue devices.
|
|
*/
|
|
|
|
for (dom = 0; dom <= ap_max_domain_id; dom++) {
|
|
qid = AP_MKQID(ac->id, dom);
|
|
dev = bus_find_device(&ap_bus_type, NULL,
|
|
(void *)(long) qid,
|
|
__match_queue_device_with_qid);
|
|
aq = dev ? to_ap_queue(dev) : NULL;
|
|
if (!ap_test_config_usage_domain(dom)) {
|
|
if (dev) {
|
|
AP_DBF_INFO("%s(%d,%d) not in config anymore, rm queue dev\n",
|
|
__func__, ac->id, dom);
|
|
device_unregister(dev);
|
|
put_device(dev);
|
|
}
|
|
continue;
|
|
}
|
|
/* domain is valid, get info from this APQN */
|
|
if (!ap_queue_info(qid, &type, &func, &depth, &ml, &decfg)) {
|
|
if (aq) {
|
|
AP_DBF_INFO("%s(%d,%d) queue_info() failed, rm queue dev\n",
|
|
__func__, ac->id, dom);
|
|
device_unregister(dev);
|
|
put_device(dev);
|
|
}
|
|
continue;
|
|
}
|
|
/* if no queue device exists, create a new one */
|
|
if (!aq) {
|
|
aq = ap_queue_create(qid, ac->ap_dev.device_type);
|
|
if (!aq) {
|
|
AP_DBF_WARN("%s(%d,%d) ap_queue_create() failed\n",
|
|
__func__, ac->id, dom);
|
|
continue;
|
|
}
|
|
aq->card = ac;
|
|
aq->config = !decfg;
|
|
dev = &aq->ap_dev.device;
|
|
dev->bus = &ap_bus_type;
|
|
dev->parent = &ac->ap_dev.device;
|
|
dev_set_name(dev, "%02x.%04x", ac->id, dom);
|
|
/* register queue device */
|
|
rc = device_register(dev);
|
|
if (rc) {
|
|
AP_DBF_WARN("%s(%d,%d) device_register() failed\n",
|
|
__func__, ac->id, dom);
|
|
goto put_dev_and_continue;
|
|
}
|
|
/* get it and thus adjust reference counter */
|
|
get_device(dev);
|
|
if (decfg)
|
|
AP_DBF_INFO("%s(%d,%d) new (decfg) queue dev created\n",
|
|
__func__, ac->id, dom);
|
|
else
|
|
AP_DBF_INFO("%s(%d,%d) new queue dev created\n",
|
|
__func__, ac->id, dom);
|
|
goto put_dev_and_continue;
|
|
}
|
|
/* Check config state on the already existing queue device */
|
|
spin_lock_bh(&aq->lock);
|
|
if (decfg && aq->config) {
|
|
/* config off this queue device */
|
|
aq->config = false;
|
|
if (aq->dev_state > AP_DEV_STATE_UNINITIATED) {
|
|
aq->dev_state = AP_DEV_STATE_ERROR;
|
|
aq->last_err_rc = AP_RESPONSE_DECONFIGURED;
|
|
}
|
|
spin_unlock_bh(&aq->lock);
|
|
AP_DBF_INFO("%s(%d,%d) queue dev config off\n",
|
|
__func__, ac->id, dom);
|
|
ap_send_config_uevent(&aq->ap_dev, aq->config);
|
|
/* 'receive' pending messages with -EAGAIN */
|
|
ap_flush_queue(aq);
|
|
goto put_dev_and_continue;
|
|
}
|
|
if (!decfg && !aq->config) {
|
|
/* config on this queue device */
|
|
aq->config = true;
|
|
if (aq->dev_state > AP_DEV_STATE_UNINITIATED) {
|
|
aq->dev_state = AP_DEV_STATE_OPERATING;
|
|
aq->sm_state = AP_SM_STATE_RESET_START;
|
|
}
|
|
spin_unlock_bh(&aq->lock);
|
|
AP_DBF_INFO("%s(%d,%d) queue dev config on\n",
|
|
__func__, ac->id, dom);
|
|
ap_send_config_uevent(&aq->ap_dev, aq->config);
|
|
goto put_dev_and_continue;
|
|
}
|
|
/* handle other error states */
|
|
if (!decfg && aq->dev_state == AP_DEV_STATE_ERROR) {
|
|
spin_unlock_bh(&aq->lock);
|
|
/* 'receive' pending messages with -EAGAIN */
|
|
ap_flush_queue(aq);
|
|
/* re-init (with reset) the queue device */
|
|
ap_queue_init_state(aq);
|
|
AP_DBF_INFO("%s(%d,%d) queue dev reinit enforced\n",
|
|
__func__, ac->id, dom);
|
|
goto put_dev_and_continue;
|
|
}
|
|
spin_unlock_bh(&aq->lock);
|
|
put_dev_and_continue:
|
|
put_device(dev);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Helper function for ap_scan_bus().
|
|
* Does the scan bus job for the given adapter id.
|
|
*/
|
|
static inline void ap_scan_adapter(int ap)
|
|
{
|
|
bool decfg;
|
|
ap_qid_t qid;
|
|
unsigned int func;
|
|
struct device *dev;
|
|
struct ap_card *ac;
|
|
int rc, dom, depth, type, comp_type, ml;
|
|
|
|
/* Is there currently a card device for this adapter ? */
|
|
dev = bus_find_device(&ap_bus_type, NULL,
|
|
(void *)(long) ap,
|
|
__match_card_device_with_id);
|
|
ac = dev ? to_ap_card(dev) : NULL;
|
|
|
|
/* Adapter not in configuration ? */
|
|
if (!ap_test_config_card_id(ap)) {
|
|
if (ac) {
|
|
AP_DBF_INFO("%s(%d) ap not in config any more, rm card and queue devs\n",
|
|
__func__, ap);
|
|
ap_scan_rm_card_dev_and_queue_devs(ac);
|
|
put_device(dev);
|
|
}
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Adapter ap is valid in the current configuration. So do some checks:
|
|
* If no card device exists, build one. If a card device exists, check
|
|
* for type and functions changed. For all this we need to find a valid
|
|
* APQN first.
|
|
*/
|
|
|
|
for (dom = 0; dom <= ap_max_domain_id; dom++)
|
|
if (ap_test_config_usage_domain(dom)) {
|
|
qid = AP_MKQID(ap, dom);
|
|
if (ap_queue_info(qid, &type, &func,
|
|
&depth, &ml, &decfg))
|
|
break;
|
|
}
|
|
if (dom > ap_max_domain_id) {
|
|
/* Could not find a valid APQN for this adapter */
|
|
if (ac) {
|
|
AP_DBF_INFO("%s(%d) no type info (no APQN found), rm card and queue devs\n",
|
|
__func__, ap);
|
|
ap_scan_rm_card_dev_and_queue_devs(ac);
|
|
put_device(dev);
|
|
} else {
|
|
AP_DBF_DBG("%s(%d) no type info (no APQN found), ignored\n",
|
|
__func__, ap);
|
|
}
|
|
return;
|
|
}
|
|
if (!type) {
|
|
/* No apdater type info available, an unusable adapter */
|
|
if (ac) {
|
|
AP_DBF_INFO("%s(%d) no valid type (0) info, rm card and queue devs\n",
|
|
__func__, ap);
|
|
ap_scan_rm_card_dev_and_queue_devs(ac);
|
|
put_device(dev);
|
|
} else {
|
|
AP_DBF_DBG("%s(%d) no valid type (0) info, ignored\n",
|
|
__func__, ap);
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (ac) {
|
|
/* Check APQN against existing card device for changes */
|
|
if (ac->raw_hwtype != type) {
|
|
AP_DBF_INFO("%s(%d) hwtype %d changed, rm card and queue devs\n",
|
|
__func__, ap, type);
|
|
ap_scan_rm_card_dev_and_queue_devs(ac);
|
|
put_device(dev);
|
|
ac = NULL;
|
|
} else if (ac->functions != func) {
|
|
AP_DBF_INFO("%s(%d) functions 0x%08x changed, rm card and queue devs\n",
|
|
__func__, ap, type);
|
|
ap_scan_rm_card_dev_and_queue_devs(ac);
|
|
put_device(dev);
|
|
ac = NULL;
|
|
} else {
|
|
if (decfg && ac->config) {
|
|
ac->config = false;
|
|
AP_DBF_INFO("%s(%d) card dev config off\n",
|
|
__func__, ap);
|
|
ap_send_config_uevent(&ac->ap_dev, ac->config);
|
|
}
|
|
if (!decfg && !ac->config) {
|
|
ac->config = true;
|
|
AP_DBF_INFO("%s(%d) card dev config on\n",
|
|
__func__, ap);
|
|
ap_send_config_uevent(&ac->ap_dev, ac->config);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!ac) {
|
|
/* Build a new card device */
|
|
comp_type = ap_get_compatible_type(qid, type, func);
|
|
if (!comp_type) {
|
|
AP_DBF_WARN("%s(%d) type %d, can't get compatibility type\n",
|
|
__func__, ap, type);
|
|
return;
|
|
}
|
|
ac = ap_card_create(ap, depth, type, comp_type, func, ml);
|
|
if (!ac) {
|
|
AP_DBF_WARN("%s(%d) ap_card_create() failed\n",
|
|
__func__, ap);
|
|
return;
|
|
}
|
|
ac->config = !decfg;
|
|
dev = &ac->ap_dev.device;
|
|
dev->bus = &ap_bus_type;
|
|
dev->parent = ap_root_device;
|
|
dev_set_name(dev, "card%02x", ap);
|
|
/* maybe enlarge ap_max_msg_size to support this card */
|
|
if (ac->maxmsgsize > atomic_read(&ap_max_msg_size)) {
|
|
atomic_set(&ap_max_msg_size, ac->maxmsgsize);
|
|
AP_DBF_INFO("%s(%d) ap_max_msg_size update to %d byte\n",
|
|
__func__, ap,
|
|
atomic_read(&ap_max_msg_size));
|
|
}
|
|
/* Register the new card device with AP bus */
|
|
rc = device_register(dev);
|
|
if (rc) {
|
|
AP_DBF_WARN("%s(%d) device_register() failed\n",
|
|
__func__, ap);
|
|
put_device(dev);
|
|
return;
|
|
}
|
|
/* get it and thus adjust reference counter */
|
|
get_device(dev);
|
|
if (decfg)
|
|
AP_DBF_INFO("%s(%d) new (decfg) card dev type=%d func=0x%08x created\n",
|
|
__func__, ap, type, func);
|
|
else
|
|
AP_DBF_INFO("%s(%d) new card dev type=%d func=0x%08x created\n",
|
|
__func__, ap, type, func);
|
|
}
|
|
|
|
/* Verify the domains and the queue devices for this card */
|
|
ap_scan_domains(ac);
|
|
|
|
/* release the card device */
|
|
put_device(&ac->ap_dev.device);
|
|
}
|
|
|
|
/**
|
|
* ap_scan_bus(): Scan the AP bus for new devices
|
|
* Runs periodically, workqueue timer (ap_config_time)
|
|
* @unused: Unused pointer.
|
|
*/
|
|
static void ap_scan_bus(struct work_struct *unused)
|
|
{
|
|
int ap;
|
|
|
|
ap_fetch_qci_info(ap_qci_info);
|
|
ap_select_domain();
|
|
|
|
AP_DBF_DBG("%s running\n", __func__);
|
|
|
|
/* loop over all possible adapters */
|
|
for (ap = 0; ap <= ap_max_adapter_id; ap++)
|
|
ap_scan_adapter(ap);
|
|
|
|
/* check if there is at least one queue available with default domain */
|
|
if (ap_domain_index >= 0) {
|
|
struct device *dev =
|
|
bus_find_device(&ap_bus_type, NULL,
|
|
(void *)(long) ap_domain_index,
|
|
__match_queue_device_with_queue_id);
|
|
if (dev)
|
|
put_device(dev);
|
|
else
|
|
AP_DBF_INFO("%s no queue device with default domain %d available\n",
|
|
__func__, ap_domain_index);
|
|
}
|
|
|
|
if (atomic64_inc_return(&ap_scan_bus_count) == 1) {
|
|
AP_DBF_DBG("%s init scan complete\n", __func__);
|
|
ap_send_init_scan_done_uevent();
|
|
ap_check_bindings_complete();
|
|
}
|
|
|
|
mod_timer(&ap_config_timer, jiffies + ap_config_time * HZ);
|
|
}
|
|
|
|
static void ap_config_timeout(struct timer_list *unused)
|
|
{
|
|
queue_work(system_long_wq, &ap_scan_work);
|
|
}
|
|
|
|
static int __init ap_debug_init(void)
|
|
{
|
|
ap_dbf_info = debug_register("ap", 2, 1,
|
|
DBF_MAX_SPRINTF_ARGS * sizeof(long));
|
|
debug_register_view(ap_dbf_info, &debug_sprintf_view);
|
|
debug_set_level(ap_dbf_info, DBF_ERR);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __init ap_perms_init(void)
|
|
{
|
|
/* all resources useable if no kernel parameter string given */
|
|
memset(&ap_perms.ioctlm, 0xFF, sizeof(ap_perms.ioctlm));
|
|
memset(&ap_perms.apm, 0xFF, sizeof(ap_perms.apm));
|
|
memset(&ap_perms.aqm, 0xFF, sizeof(ap_perms.aqm));
|
|
|
|
/* apm kernel parameter string */
|
|
if (apm_str) {
|
|
memset(&ap_perms.apm, 0, sizeof(ap_perms.apm));
|
|
ap_parse_mask_str(apm_str, ap_perms.apm, AP_DEVICES,
|
|
&ap_perms_mutex);
|
|
}
|
|
|
|
/* aqm kernel parameter string */
|
|
if (aqm_str) {
|
|
memset(&ap_perms.aqm, 0, sizeof(ap_perms.aqm));
|
|
ap_parse_mask_str(aqm_str, ap_perms.aqm, AP_DOMAINS,
|
|
&ap_perms_mutex);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ap_module_init(): The module initialization code.
|
|
*
|
|
* Initializes the module.
|
|
*/
|
|
static int __init ap_module_init(void)
|
|
{
|
|
int rc;
|
|
|
|
rc = ap_debug_init();
|
|
if (rc)
|
|
return rc;
|
|
|
|
if (!ap_instructions_available()) {
|
|
pr_warn("The hardware system does not support AP instructions\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* init ap_queue hashtable */
|
|
hash_init(ap_queues);
|
|
|
|
/* set up the AP permissions (ioctls, ap and aq masks) */
|
|
ap_perms_init();
|
|
|
|
/* Get AP configuration data if available */
|
|
ap_init_qci_info();
|
|
|
|
/* check default domain setting */
|
|
if (ap_domain_index < -1 || ap_domain_index > ap_max_domain_id ||
|
|
(ap_domain_index >= 0 &&
|
|
!test_bit_inv(ap_domain_index, ap_perms.aqm))) {
|
|
pr_warn("%d is not a valid cryptographic domain\n",
|
|
ap_domain_index);
|
|
ap_domain_index = -1;
|
|
}
|
|
|
|
/* enable interrupts if available */
|
|
if (ap_interrupts_available() && ap_useirq) {
|
|
rc = register_adapter_interrupt(&ap_airq);
|
|
ap_irq_flag = (rc == 0);
|
|
}
|
|
|
|
/* Create /sys/bus/ap. */
|
|
rc = bus_register(&ap_bus_type);
|
|
if (rc)
|
|
goto out;
|
|
|
|
/* Create /sys/devices/ap. */
|
|
ap_root_device = root_device_register("ap");
|
|
rc = PTR_ERR_OR_ZERO(ap_root_device);
|
|
if (rc)
|
|
goto out_bus;
|
|
ap_root_device->bus = &ap_bus_type;
|
|
|
|
/* Setup the AP bus rescan timer. */
|
|
timer_setup(&ap_config_timer, ap_config_timeout, 0);
|
|
|
|
/*
|
|
* Setup the high resultion poll timer.
|
|
* If we are running under z/VM adjust polling to z/VM polling rate.
|
|
*/
|
|
if (MACHINE_IS_VM)
|
|
poll_timeout = 1500000;
|
|
hrtimer_init(&ap_poll_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
|
|
ap_poll_timer.function = ap_poll_timeout;
|
|
|
|
/* Start the low priority AP bus poll thread. */
|
|
if (ap_thread_flag) {
|
|
rc = ap_poll_thread_start();
|
|
if (rc)
|
|
goto out_work;
|
|
}
|
|
|
|
queue_work(system_long_wq, &ap_scan_work);
|
|
|
|
return 0;
|
|
|
|
out_work:
|
|
hrtimer_cancel(&ap_poll_timer);
|
|
root_device_unregister(ap_root_device);
|
|
out_bus:
|
|
bus_unregister(&ap_bus_type);
|
|
out:
|
|
if (ap_irq_flag)
|
|
unregister_adapter_interrupt(&ap_airq);
|
|
kfree(ap_qci_info);
|
|
return rc;
|
|
}
|
|
device_initcall(ap_module_init);
|