diff options
Diffstat (limited to 'drivers/tty/hvc')
| -rw-r--r-- | drivers/tty/hvc/hvc_console.c | 19 | ||||
| -rw-r--r-- | drivers/tty/hvc/hvc_dcc.c | 42 | ||||
| -rw-r--r-- | drivers/tty/hvc/hvc_iucv.c | 103 | ||||
| -rw-r--r-- | drivers/tty/hvc/hvc_opal.c | 30 | ||||
| -rw-r--r-- | drivers/tty/hvc/hvc_rtas.c | 12 | ||||
| -rw-r--r-- | drivers/tty/hvc/hvc_tile.c | 10 | ||||
| -rw-r--r-- | drivers/tty/hvc/hvc_udbg.c | 9 | ||||
| -rw-r--r-- | drivers/tty/hvc/hvc_xen.c | 17 | ||||
| -rw-r--r-- | drivers/tty/hvc/hvsi_lib.c | 1 |
9 files changed, 142 insertions, 101 deletions
diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_console.c index 9eba119bcdd..4fcec1d793a 100644 --- a/drivers/tty/hvc/hvc_console.c +++ b/drivers/tty/hvc/hvc_console.c @@ -31,6 +31,7 @@ #include <linux/list.h> #include <linux/module.h> #include <linux/major.h> +#include <linux/atomic.h> #include <linux/sysrq.h> #include <linux/tty.h> #include <linux/tty_flip.h> @@ -70,6 +71,9 @@ static struct task_struct *hvc_task; /* Picks up late kicks after list walk but before schedule() */ static int hvc_kicked; +/* hvc_init is triggered from hvc_alloc, i.e. only when actually used */ +static atomic_t hvc_needs_init __read_mostly = ATOMIC_INIT(-1); + static int hvc_init(void); #ifdef CONFIG_MAGIC_SYSRQ @@ -186,7 +190,7 @@ static struct tty_driver *hvc_console_device(struct console *c, int *index) return hvc_driver; } -static int __init hvc_console_setup(struct console *co, char *options) +static int hvc_console_setup(struct console *co, char *options) { if (co->index < 0 || co->index >= MAX_NR_HVC_CONSOLES) return -ENODEV; @@ -756,10 +760,17 @@ static int khvcd(void *unused) if (poll_mask == 0) schedule(); else { + unsigned long j_timeout; + if (timeout < MAX_TIMEOUT) timeout += (timeout >> 6) + 1; - msleep_interruptible(timeout); + /* + * We don't use msleep_interruptible otherwise + * "kick" will fail to wake us up + */ + j_timeout = msecs_to_jiffies(timeout) + 1; + schedule_timeout_interruptible(j_timeout); } } __set_current_state(TASK_RUNNING); @@ -788,7 +799,7 @@ static int hvc_tiocmset(struct tty_struct *tty, } #ifdef CONFIG_CONSOLE_POLL -int hvc_poll_init(struct tty_driver *driver, int line, char *options) +static int hvc_poll_init(struct tty_driver *driver, int line, char *options) { return 0; } @@ -851,7 +862,7 @@ struct hvc_struct *hvc_alloc(uint32_t vtermno, int data, int i; /* We wait until a driver actually comes along */ - if (!hvc_driver) { + if (atomic_inc_not_zero(&hvc_needs_init)) { int err = hvc_init(); if (err) return ERR_PTR(err); diff --git a/drivers/tty/hvc/hvc_dcc.c b/drivers/tty/hvc/hvc_dcc.c index 3502a7bbb69..809920d80a6 100644 --- a/drivers/tty/hvc/hvc_dcc.c +++ b/drivers/tty/hvc/hvc_dcc.c @@ -1,4 +1,4 @@ -/* Copyright (c) 2010, Code Aurora Forum. All rights reserved. +/* Copyright (c) 2010, 2014 The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and @@ -8,20 +8,11 @@ * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. */ -#include <linux/console.h> -#include <linux/delay.h> -#include <linux/err.h> #include <linux/init.h> -#include <linux/moduleparam.h> -#include <linux/types.h> +#include <asm/dcc.h> #include <asm/processor.h> #include "hvc_console.h" @@ -30,35 +21,6 @@ #define DCC_STATUS_RX (1 << 30) #define DCC_STATUS_TX (1 << 29) -static inline u32 __dcc_getstatus(void) -{ - u32 __ret; - asm volatile("mrc p14, 0, %0, c0, c1, 0 @ read comms ctrl reg" - : "=r" (__ret) : : "cc"); - - return __ret; -} - - -static inline char __dcc_getchar(void) -{ - char __c; - - asm volatile("mrc p14, 0, %0, c0, c5, 0 @ read comms data reg" - : "=r" (__c)); - isb(); - - return __c; -} - -static inline void __dcc_putchar(char c) -{ - asm volatile("mcr p14, 0, %0, c0, c5, 0 @ write a char" - : /* no output register */ - : "r" (c)); - isb(); -} - static int hvc_dcc_put_chars(uint32_t vt, const char *buf, int count) { int i; diff --git a/drivers/tty/hvc/hvc_iucv.c b/drivers/tty/hvc/hvc_iucv.c index db19a38c8c6..ea74460f363 100644 --- a/drivers/tty/hvc/hvc_iucv.c +++ b/drivers/tty/hvc/hvc_iucv.c @@ -77,6 +77,7 @@ struct hvc_iucv_private { struct list_head tty_outqueue; /* outgoing IUCV messages */ struct list_head tty_inqueue; /* incoming IUCV messages */ struct device *dev; /* device structure */ + u8 info_path[16]; /* IUCV path info (dev attr) */ }; struct iucv_tty_buffer { @@ -126,7 +127,7 @@ static struct iucv_handler hvc_iucv_handler = { * This function returns the struct hvc_iucv_private instance that corresponds * to the HVC virtual terminal number specified as parameter @num. */ -struct hvc_iucv_private *hvc_iucv_get_private(uint32_t num) +static struct hvc_iucv_private *hvc_iucv_get_private(uint32_t num) { if ((num < HVC_IUCV_MAGIC) || (num - HVC_IUCV_MAGIC > hvc_iucv_devices)) return NULL; @@ -772,18 +773,37 @@ static int hvc_iucv_filter_connreq(u8 ipvmid[8]) static int hvc_iucv_path_pending(struct iucv_path *path, u8 ipvmid[8], u8 ipuser[16]) { - struct hvc_iucv_private *priv; + struct hvc_iucv_private *priv, *tmp; + u8 wildcard[9] = "lnxhvc "; + int i, rc, find_unused; u8 nuser_data[16]; u8 vm_user_id[9]; - int i, rc; + ASCEBC(wildcard, sizeof(wildcard)); + find_unused = !memcmp(wildcard, ipuser, 8); + + /* First, check if the pending path request is managed by this + * IUCV handler: + * - find a disconnected device if ipuser contains the wildcard + * - find the device that matches the terminal ID in ipuser + */ priv = NULL; - for (i = 0; i < hvc_iucv_devices; i++) - if (hvc_iucv_table[i] && - (0 == memcmp(hvc_iucv_table[i]->srv_name, ipuser, 8))) { - priv = hvc_iucv_table[i]; + for (i = 0; i < hvc_iucv_devices; i++) { + tmp = hvc_iucv_table[i]; + if (!tmp) + continue; + + if (find_unused) { + spin_lock(&tmp->lock); + if (tmp->iucv_state == IUCV_DISCONN) + priv = tmp; + spin_unlock(&tmp->lock); + + } else if (!memcmp(tmp->srv_name, ipuser, 8)) + priv = tmp; + if (priv) break; - } + } if (!priv) return -ENODEV; @@ -826,6 +846,10 @@ static int hvc_iucv_path_pending(struct iucv_path *path, priv->path = path; priv->iucv_state = IUCV_CONNECTED; + /* store path information */ + memcpy(priv->info_path, ipvmid, 8); + memcpy(priv->info_path + 8, ipuser + 8, 8); + /* flush buffered output data... */ schedule_delayed_work(&priv->sndbuf_work, 5); @@ -960,6 +984,49 @@ static int hvc_iucv_pm_restore_thaw(struct device *dev) return 0; } +static ssize_t hvc_iucv_dev_termid_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct hvc_iucv_private *priv = dev_get_drvdata(dev); + size_t len; + + len = sizeof(priv->srv_name); + memcpy(buf, priv->srv_name, len); + EBCASC(buf, len); + buf[len++] = '\n'; + return len; +} + +static ssize_t hvc_iucv_dev_state_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct hvc_iucv_private *priv = dev_get_drvdata(dev); + return sprintf(buf, "%u:%u\n", priv->iucv_state, priv->tty_state); +} + +static ssize_t hvc_iucv_dev_peer_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct hvc_iucv_private *priv = dev_get_drvdata(dev); + char vmid[9], ipuser[9]; + + memset(vmid, 0, sizeof(vmid)); + memset(ipuser, 0, sizeof(ipuser)); + + spin_lock_bh(&priv->lock); + if (priv->iucv_state == IUCV_CONNECTED) { + memcpy(vmid, priv->info_path, 8); + memcpy(ipuser, priv->info_path + 8, 8); + } + spin_unlock_bh(&priv->lock); + EBCASC(ipuser, 8); + + return sprintf(buf, "%s:%s\n", vmid, ipuser); +} + /* HVC operations */ static const struct hv_ops hvc_iucv_ops = { @@ -985,6 +1052,25 @@ static struct device_driver hvc_iucv_driver = { .pm = &hvc_iucv_pm_ops, }; +/* IUCV HVC device attributes */ +static DEVICE_ATTR(termid, 0640, hvc_iucv_dev_termid_show, NULL); +static DEVICE_ATTR(state, 0640, hvc_iucv_dev_state_show, NULL); +static DEVICE_ATTR(peer, 0640, hvc_iucv_dev_peer_show, NULL); +static struct attribute *hvc_iucv_dev_attrs[] = { + &dev_attr_termid.attr, + &dev_attr_state.attr, + &dev_attr_peer.attr, + NULL, +}; +static struct attribute_group hvc_iucv_dev_attr_group = { + .attrs = hvc_iucv_dev_attrs, +}; +static const struct attribute_group *hvc_iucv_dev_attr_groups[] = { + &hvc_iucv_dev_attr_group, + NULL, +}; + + /** * hvc_iucv_alloc() - Allocates a new struct hvc_iucv_private instance * @id: hvc_iucv_table index @@ -1046,6 +1132,7 @@ static int __init hvc_iucv_alloc(int id, unsigned int is_console) priv->dev->bus = &iucv_bus; priv->dev->parent = iucv_root; priv->dev->driver = &hvc_iucv_driver; + priv->dev->groups = hvc_iucv_dev_attr_groups; priv->dev->release = (void (*)(struct device *)) kfree; rc = device_register(priv->dev); if (rc) { diff --git a/drivers/tty/hvc/hvc_opal.c b/drivers/tty/hvc/hvc_opal.c index 6496872e2e4..a585079b4b3 100644 --- a/drivers/tty/hvc/hvc_opal.c +++ b/drivers/tty/hvc/hvc_opal.c @@ -61,6 +61,7 @@ static struct hvc_opal_priv *hvc_opal_privs[MAX_NR_HVC_CONSOLES]; /* For early boot console */ static struct hvc_opal_priv hvc_opal_boot_priv; static u32 hvc_opal_boot_termno; +static bool hvc_opal_event_registered; static const struct hv_ops hvc_opal_raw_ops = { .get_chars = opal_get_chars, @@ -161,6 +162,18 @@ static const struct hv_ops hvc_opal_hvsi_ops = { .tiocmset = hvc_opal_hvsi_tiocmset, }; +static int hvc_opal_console_event(struct notifier_block *nb, + unsigned long events, void *change) +{ + if (events & OPAL_EVENT_CONSOLE_INPUT) + hvc_kick(); + return 0; +} + +static struct notifier_block hvc_opal_console_nb = { + .notifier_call = hvc_opal_console_event, +}; + static int hvc_opal_probe(struct platform_device *dev) { const struct hv_ops *ops; @@ -170,6 +183,7 @@ static int hvc_opal_probe(struct platform_device *dev) unsigned int termno, boot = 0; const __be32 *reg; + if (of_device_is_compatible(dev->dev.of_node, "ibm,opal-console-raw")) { proto = HV_PROTOCOL_RAW; ops = &hvc_opal_raw_ops; @@ -213,12 +227,18 @@ static int hvc_opal_probe(struct platform_device *dev) dev->dev.of_node->full_name, boot ? " (boot console)" : ""); - /* We don't do IRQ yet */ + /* We don't do IRQ ... */ hp = hvc_alloc(termno, 0, ops, MAX_VIO_PUT_CHARS); if (IS_ERR(hp)) return PTR_ERR(hp); dev_set_drvdata(&dev->dev, hp); + /* ... but we use OPAL event to kick the console */ + if (!hvc_opal_event_registered) { + opal_notifier_register(&hvc_opal_console_nb); + hvc_opal_event_registered = true; + } + return 0; } @@ -255,13 +275,7 @@ static int __init hvc_opal_init(void) /* Register as a vio device to receive callbacks */ return platform_driver_register(&hvc_opal_driver); } -module_init(hvc_opal_init); - -static void __exit hvc_opal_exit(void) -{ - platform_driver_unregister(&hvc_opal_driver); -} -module_exit(hvc_opal_exit); +device_initcall(hvc_opal_init); static void udbg_opal_putc(char c) { diff --git a/drivers/tty/hvc/hvc_rtas.c b/drivers/tty/hvc/hvc_rtas.c index 0069bb86ba4..08c87920b74 100644 --- a/drivers/tty/hvc/hvc_rtas.c +++ b/drivers/tty/hvc/hvc_rtas.c @@ -102,17 +102,7 @@ static int __init hvc_rtas_init(void) return 0; } -module_init(hvc_rtas_init); - -/* This will tear down the tty portion of the driver */ -static void __exit hvc_rtas_exit(void) -{ - /* Really the fun isn't over until the worker thread breaks down and - * the tty cleans up */ - if (hvc_rtas_dev) - hvc_remove(hvc_rtas_dev); -} -module_exit(hvc_rtas_exit); +device_initcall(hvc_rtas_init); /* This will happen prior to module init. There is no tty at this time? */ static int __init hvc_rtas_console_init(void) diff --git a/drivers/tty/hvc/hvc_tile.c b/drivers/tty/hvc/hvc_tile.c index af8cdaa1dcb..df374860037 100644 --- a/drivers/tty/hvc/hvc_tile.c +++ b/drivers/tty/hvc/hvc_tile.c @@ -133,14 +133,14 @@ static int hvc_tile_probe(struct platform_device *pdev) int tile_hvc_irq; /* Create our IRQ and register it. */ - tile_hvc_irq = create_irq(); - if (tile_hvc_irq < 0) + tile_hvc_irq = irq_alloc_hwirq(-1); + if (!tile_hvc_irq) return -ENXIO; tile_irq_activate(tile_hvc_irq, TILE_IRQ_PERCPU); hp = hvc_alloc(0, tile_hvc_irq, &hvc_tile_get_put_ops, 128); if (IS_ERR(hp)) { - destroy_irq(tile_hvc_irq); + irq_free_hwirq(tile_hvc_irq); return PTR_ERR(hp); } dev_set_drvdata(&pdev->dev, hp); @@ -155,7 +155,7 @@ static int hvc_tile_remove(struct platform_device *pdev) rc = hvc_remove(hp); if (rc == 0) - destroy_irq(hp->data); + irq_free_hwirq(hp->data); return rc; } @@ -196,7 +196,7 @@ static int __init hvc_tile_init(void) #ifndef __tilegx__ struct hvc_struct *hp; hp = hvc_alloc(0, 0, &hvc_tile_get_put_ops, 128); - return IS_ERR(hp) ? PTR_ERR(hp) : 0; + return PTR_ERR_OR_ZERO(hp); #else platform_device_register(&hvc_tile_pdev); return platform_driver_register(&hvc_tile_driver); diff --git a/drivers/tty/hvc/hvc_udbg.c b/drivers/tty/hvc/hvc_udbg.c index 72228276fe3..9cf573d06a2 100644 --- a/drivers/tty/hvc/hvc_udbg.c +++ b/drivers/tty/hvc/hvc_udbg.c @@ -80,14 +80,7 @@ static int __init hvc_udbg_init(void) return 0; } -module_init(hvc_udbg_init); - -static void __exit hvc_udbg_exit(void) -{ - if (hvc_udbg_dev) - hvc_remove(hvc_udbg_dev); -} -module_exit(hvc_udbg_exit); +device_initcall(hvc_udbg_init); static int __init hvc_udbg_console_init(void) { diff --git a/drivers/tty/hvc/hvc_xen.c b/drivers/tty/hvc/hvc_xen.c index 636c9baad7a..2dc2831840c 100644 --- a/drivers/tty/hvc/hvc_xen.c +++ b/drivers/tty/hvc/hvc_xen.c @@ -561,18 +561,7 @@ static int __init xen_hvc_init(void) #endif return r; } - -static void __exit xen_hvc_fini(void) -{ - struct xencons_info *entry, *next; - - if (list_empty(&xenconsoles)) - return; - - list_for_each_entry_safe(entry, next, &xenconsoles, list) { - xen_console_remove(entry); - } -} +device_initcall(xen_hvc_init); static int xen_cons_init(void) { @@ -598,10 +587,6 @@ static int xen_cons_init(void) hvc_instantiate(HVC_COOKIE, 0, ops); return 0; } - - -module_init(xen_hvc_init); -module_exit(xen_hvc_fini); console_initcall(xen_cons_init); #ifdef CONFIG_EARLY_PRINTK diff --git a/drivers/tty/hvc/hvsi_lib.c b/drivers/tty/hvc/hvsi_lib.c index 347050ea414..7ae6c293e51 100644 --- a/drivers/tty/hvc/hvsi_lib.c +++ b/drivers/tty/hvc/hvsi_lib.c @@ -1,5 +1,4 @@ #include <linux/types.h> -#include <linux/init.h> #include <linux/delay.h> #include <linux/slab.h> #include <linux/console.h> |