diff options
Diffstat (limited to 'drivers/tty/hvc')
-rw-r--r-- | drivers/tty/hvc/Kconfig | 22 | ||||
-rw-r--r-- | drivers/tty/hvc/Makefile | 1 | ||||
-rw-r--r-- | drivers/tty/hvc/hvc_beat.c | 2 | ||||
-rw-r--r-- | drivers/tty/hvc/hvc_console.c | 1 | ||||
-rw-r--r-- | drivers/tty/hvc/hvc_iseries.c | 599 | ||||
-rw-r--r-- | drivers/tty/hvc/hvc_rtas.c | 2 | ||||
-rw-r--r-- | drivers/tty/hvc/hvc_udbg.c | 10 | ||||
-rw-r--r-- | drivers/tty/hvc/hvc_vio.c | 11 | ||||
-rw-r--r-- | drivers/tty/hvc/hvc_xen.c | 465 | ||||
-rw-r--r-- | drivers/tty/hvc/hvcs.c | 35 | ||||
-rw-r--r-- | drivers/tty/hvc/hvsi.c | 8 |
11 files changed, 461 insertions, 695 deletions
diff --git a/drivers/tty/hvc/Kconfig b/drivers/tty/hvc/Kconfig index 4222035..0282a83 100644 --- a/drivers/tty/hvc/Kconfig +++ b/drivers/tty/hvc/Kconfig @@ -24,16 +24,6 @@ config HVC_OLD_HVSI depends on HVC_CONSOLE default n -config HVC_ISERIES - bool "iSeries Hypervisor Virtual Console support" - depends on PPC_ISERIES - default y - select HVC_DRIVER - select HVC_IRQ - select VIOPATH - help - iSeries machines support a hypervisor virtual console. - config HVC_OPAL bool "OPAL Console support" depends on PPC_POWERNV @@ -76,11 +66,23 @@ config HVC_XEN help Xen virtual console device driver +config HVC_XEN_FRONTEND + bool "Xen Hypervisor Multiple Consoles support" + depends on HVC_XEN + select XEN_XENBUS_FRONTEND + default y + help + Xen driver for secondary virtual consoles + config HVC_UDBG bool "udbg based fake hypervisor console" depends on PPC && EXPERIMENTAL select HVC_DRIVER default n + help + This is meant to be used during HW bring up or debugging when + no other console mechanism exist but udbg, to get you a quick + console for userspace. Do NOT enable in production kernels. config HVC_DCC bool "ARM JTAG DCC console" diff --git a/drivers/tty/hvc/Makefile b/drivers/tty/hvc/Makefile index 89abf40b..4ca3723 100644 --- a/drivers/tty/hvc/Makefile +++ b/drivers/tty/hvc/Makefile @@ -1,7 +1,6 @@ obj-$(CONFIG_HVC_CONSOLE) += hvc_vio.o hvsi_lib.o obj-$(CONFIG_HVC_OPAL) += hvc_opal.o hvsi_lib.o obj-$(CONFIG_HVC_OLD_HVSI) += hvsi.o -obj-$(CONFIG_HVC_ISERIES) += hvc_iseries.o obj-$(CONFIG_HVC_RTAS) += hvc_rtas.o obj-$(CONFIG_HVC_TILE) += hvc_tile.o obj-$(CONFIG_HVC_DCC) += hvc_dcc.o diff --git a/drivers/tty/hvc/hvc_beat.c b/drivers/tty/hvc/hvc_beat.c index 5fe4631..1560d23 100644 --- a/drivers/tty/hvc/hvc_beat.c +++ b/drivers/tty/hvc/hvc_beat.c @@ -113,7 +113,7 @@ static int __init hvc_beat_init(void) if (!firmware_has_feature(FW_FEATURE_BEAT)) return -ENODEV; - hp = hvc_alloc(0, NO_IRQ, &hvc_beat_get_put_ops, 16); + hp = hvc_alloc(0, 0, &hvc_beat_get_put_ops, 16); if (IS_ERR(hp)) return PTR_ERR(hp); hvc_beat_dev = hp; diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_console.c index b6b2d18..8880adf 100644 --- a/drivers/tty/hvc/hvc_console.c +++ b/drivers/tty/hvc/hvc_console.c @@ -917,7 +917,6 @@ static int hvc_init(void) goto out; } - drv->owner = THIS_MODULE; drv->driver_name = "hvc"; drv->name = "hvc"; drv->major = HVC_MAJOR; diff --git a/drivers/tty/hvc/hvc_iseries.c b/drivers/tty/hvc/hvc_iseries.c deleted file mode 100644 index 3f4a897..0000000 --- a/drivers/tty/hvc/hvc_iseries.c +++ /dev/null @@ -1,599 +0,0 @@ -/* - * iSeries vio driver interface to hvc_console.c - * - * This code is based heavily on hvc_vio.c and viocons.c - * - * Copyright (C) 2006 Stephen Rothwell, IBM Corporation - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ -#include <stdarg.h> -#include <linux/types.h> -#include <linux/init.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/spinlock.h> -#include <linux/console.h> - -#include <asm/hvconsole.h> -#include <asm/vio.h> -#include <asm/prom.h> -#include <asm/firmware.h> -#include <asm/iseries/vio.h> -#include <asm/iseries/hv_call.h> -#include <asm/iseries/hv_lp_config.h> -#include <asm/iseries/hv_lp_event.h> - -#include "hvc_console.h" - -#define VTTY_PORTS 10 - -static DEFINE_SPINLOCK(consolelock); -static DEFINE_SPINLOCK(consoleloglock); - -static const char hvc_driver_name[] = "hvc_console"; - -#define IN_BUF_SIZE 200 - -/* - * Our port information. - */ -static struct port_info { - HvLpIndex lp; - u64 seq; /* sequence number of last HV send */ - u64 ack; /* last ack from HV */ - struct hvc_struct *hp; - int in_start; - int in_end; - unsigned char in_buf[IN_BUF_SIZE]; -} port_info[VTTY_PORTS] = { - [ 0 ... VTTY_PORTS - 1 ] = { - .lp = HvLpIndexInvalid - } -}; - -#define viochar_is_console(pi) ((pi) == &port_info[0]) - -static struct vio_device_id hvc_driver_table[] __devinitdata = { - {"serial", "IBM,iSeries-vty"}, - { "", "" } -}; -MODULE_DEVICE_TABLE(vio, hvc_driver_table); - -static void hvlog(char *fmt, ...) -{ - int i; - unsigned long flags; - va_list args; - static char buf[256]; - - spin_lock_irqsave(&consoleloglock, flags); - va_start(args, fmt); - i = vscnprintf(buf, sizeof(buf) - 1, fmt, args); - va_end(args); - buf[i++] = '\r'; - HvCall_writeLogBuffer(buf, i); - spin_unlock_irqrestore(&consoleloglock, flags); -} - -/* - * Initialize the common fields in a charLpEvent - */ -static void init_data_event(struct viocharlpevent *viochar, HvLpIndex lp) -{ - struct HvLpEvent *hev = &viochar->event; - - memset(viochar, 0, sizeof(struct viocharlpevent)); - - hev->flags = HV_LP_EVENT_VALID | HV_LP_EVENT_DEFERRED_ACK | - HV_LP_EVENT_INT; - hev->xType = HvLpEvent_Type_VirtualIo; - hev->xSubtype = viomajorsubtype_chario | viochardata; - hev->xSourceLp = HvLpConfig_getLpIndex(); - hev->xTargetLp = lp; - hev->xSizeMinus1 = sizeof(struct viocharlpevent); - hev->xSourceInstanceId = viopath_sourceinst(lp); - hev->xTargetInstanceId = viopath_targetinst(lp); -} - -static int get_chars(uint32_t vtermno, char *buf, int count) -{ - struct port_info *pi; - int n = 0; - unsigned long flags; - - if (vtermno >= VTTY_PORTS) - return -EINVAL; - if (count == 0) - return 0; - - pi = &port_info[vtermno]; - spin_lock_irqsave(&consolelock, flags); - - if (pi->in_end == 0) - goto done; - - n = pi->in_end - pi->in_start; - if (n > count) - n = count; - memcpy(buf, &pi->in_buf[pi->in_start], n); - pi->in_start += n; - if (pi->in_start == pi->in_end) { - pi->in_start = 0; - pi->in_end = 0; - } -done: - spin_unlock_irqrestore(&consolelock, flags); - return n; -} - -static int put_chars(uint32_t vtermno, const char *buf, int count) -{ - struct viocharlpevent *viochar; - struct port_info *pi; - HvLpEvent_Rc hvrc; - unsigned long flags; - int sent = 0; - - if (vtermno >= VTTY_PORTS) - return -EINVAL; - - pi = &port_info[vtermno]; - - spin_lock_irqsave(&consolelock, flags); - - if (viochar_is_console(pi) && !viopath_isactive(pi->lp)) { - HvCall_writeLogBuffer(buf, count); - sent = count; - goto done; - } - - viochar = vio_get_event_buffer(viomajorsubtype_chario); - if (viochar == NULL) { - hvlog("\n\rviocons: Can't get viochar buffer."); - goto done; - } - - while ((count > 0) && ((pi->seq - pi->ack) < VIOCHAR_WINDOW)) { - int len; - - len = (count > VIOCHAR_MAX_DATA) ? VIOCHAR_MAX_DATA : count; - - if (viochar_is_console(pi)) - HvCall_writeLogBuffer(buf, len); - - init_data_event(viochar, pi->lp); - - viochar->len = len; - viochar->event.xCorrelationToken = pi->seq++; - viochar->event.xSizeMinus1 = - offsetof(struct viocharlpevent, data) + len; - - memcpy(viochar->data, buf, len); - - hvrc = HvCallEvent_signalLpEvent(&viochar->event); - if (hvrc) - hvlog("\n\rerror sending event! return code %d\n\r", - (int)hvrc); - sent += len; - count -= len; - buf += len; - } - - vio_free_event_buffer(viomajorsubtype_chario, viochar); -done: - spin_unlock_irqrestore(&consolelock, flags); - return sent; -} - -static const struct hv_ops hvc_get_put_ops = { - .get_chars = get_chars, - .put_chars = put_chars, - .notifier_add = notifier_add_irq, - .notifier_del = notifier_del_irq, - .notifier_hangup = notifier_hangup_irq, -}; - -static int __devinit hvc_vio_probe(struct vio_dev *vdev, - const struct vio_device_id *id) -{ - struct hvc_struct *hp; - struct port_info *pi; - - /* probed with invalid parameters. */ - if (!vdev || !id) - return -EPERM; - - if (vdev->unit_address >= VTTY_PORTS) - return -ENODEV; - - pi = &port_info[vdev->unit_address]; - - hp = hvc_alloc(vdev->unit_address, vdev->irq, &hvc_get_put_ops, - VIOCHAR_MAX_DATA); - if (IS_ERR(hp)) - return PTR_ERR(hp); - pi->hp = hp; - dev_set_drvdata(&vdev->dev, pi); - - return 0; -} - -static int __devexit hvc_vio_remove(struct vio_dev *vdev) -{ - struct port_info *pi = dev_get_drvdata(&vdev->dev); - struct hvc_struct *hp = pi->hp; - - return hvc_remove(hp); -} - -static struct vio_driver hvc_vio_driver = { - .id_table = hvc_driver_table, - .probe = hvc_vio_probe, - .remove = __devexit_p(hvc_vio_remove), - .driver = { - .name = hvc_driver_name, - .owner = THIS_MODULE, - } -}; - -static void hvc_open_event(struct HvLpEvent *event) -{ - unsigned long flags; - struct viocharlpevent *cevent = (struct viocharlpevent *)event; - u8 port = cevent->virtual_device; - struct port_info *pi; - int reject = 0; - - if (hvlpevent_is_ack(event)) { - if (port >= VTTY_PORTS) - return; - - spin_lock_irqsave(&consolelock, flags); - - pi = &port_info[port]; - if (event->xRc == HvLpEvent_Rc_Good) { - pi->seq = pi->ack = 0; - /* - * This line allows connections from the primary - * partition but once one is connected from the - * primary partition nothing short of a reboot - * of linux will allow access from the hosting - * partition again without a required iSeries fix. - */ - pi->lp = event->xTargetLp; - } - - spin_unlock_irqrestore(&consolelock, flags); - if (event->xRc != HvLpEvent_Rc_Good) - printk(KERN_WARNING - "hvc: handle_open_event: event->xRc == (%d).\n", - event->xRc); - - if (event->xCorrelationToken != 0) { - atomic_t *aptr= (atomic_t *)event->xCorrelationToken; - atomic_set(aptr, 1); - } else - printk(KERN_WARNING - "hvc: weird...got open ack without atomic\n"); - return; - } - - /* This had better require an ack, otherwise complain */ - if (!hvlpevent_need_ack(event)) { - printk(KERN_WARNING "hvc: viocharopen without ack bit!\n"); - return; - } - - spin_lock_irqsave(&consolelock, flags); - - /* Make sure this is a good virtual tty */ - if (port >= VTTY_PORTS) { - event->xRc = HvLpEvent_Rc_SubtypeError; - cevent->subtype_result_code = viorc_openRejected; - /* - * Flag state here since we can't printk while holding - * the consolelock spinlock. - */ - reject = 1; - } else { - pi = &port_info[port]; - if ((pi->lp != HvLpIndexInvalid) && - (pi->lp != event->xSourceLp)) { - /* - * If this is tty is already connected to a different - * partition, fail. - */ - event->xRc = HvLpEvent_Rc_SubtypeError; - cevent->subtype_result_code = viorc_openRejected; - reject = 2; - } else { - pi->lp = event->xSourceLp; - event->xRc = HvLpEvent_Rc_Good; - cevent->subtype_result_code = viorc_good; - pi->seq = pi->ack = 0; - } - } - - spin_unlock_irqrestore(&consolelock, flags); - - if (reject == 1) - printk(KERN_WARNING "hvc: open rejected: bad virtual tty.\n"); - else if (reject == 2) - printk(KERN_WARNING "hvc: open rejected: console in exclusive " - "use by another partition.\n"); - - /* Return the acknowledgement */ - HvCallEvent_ackLpEvent(event); -} - -/* - * Handle a close charLpEvent. This should ONLY be an Interrupt because the - * virtual console should never actually issue a close event to the hypervisor - * because the virtual console never goes away. A close event coming from the - * hypervisor simply means that there are no client consoles connected to the - * virtual console. - */ -static void hvc_close_event(struct HvLpEvent *event) -{ - unsigned long flags; - struct viocharlpevent *cevent = (struct viocharlpevent *)event; - u8 port = cevent->virtual_device; - - if (!hvlpevent_is_int(event)) { - printk(KERN_WARNING - "hvc: got unexpected close acknowledgement\n"); - return; - } - - if (port >= VTTY_PORTS) { - printk(KERN_WARNING - "hvc: close message from invalid virtual device.\n"); - return; - } - - /* For closes, just mark the console partition invalid */ - spin_lock_irqsave(&consolelock, flags); - - if (port_info[port].lp == event->xSourceLp) - port_info[port].lp = HvLpIndexInvalid; - - spin_unlock_irqrestore(&consolelock, flags); -} - -static void hvc_data_event(struct HvLpEvent *event) -{ - unsigned long flags; - struct viocharlpevent *cevent = (struct viocharlpevent *)event; - struct port_info *pi; - int n; - u8 port = cevent->virtual_device; - - if (port >= VTTY_PORTS) { - printk(KERN_WARNING "hvc: data on invalid virtual device %d\n", - port); - return; - } - if (cevent->len == 0) - return; - - /* - * Change 05/01/2003 - Ryan Arnold: If a partition other than - * the current exclusive partition tries to send us data - * events then just drop them on the floor because we don't - * want his stinking data. He isn't authorized to receive - * data because he wasn't the first one to get the console, - * therefore he shouldn't be allowed to send data either. - * This will work without an iSeries fix. - */ - pi = &port_info[port]; - if (pi->lp != event->xSourceLp) - return; - - spin_lock_irqsave(&consolelock, flags); - - n = IN_BUF_SIZE - pi->in_end; - if (n > cevent->len) - n = cevent->len; - if (n > 0) { - memcpy(&pi->in_buf[pi->in_end], cevent->data, n); - pi->in_end += n; - } - spin_unlock_irqrestore(&consolelock, flags); - if (n == 0) - printk(KERN_WARNING "hvc: input buffer overflow\n"); -} - -static void hvc_ack_event(struct HvLpEvent *event) -{ - struct viocharlpevent *cevent = (struct viocharlpevent *)event; - unsigned long flags; - u8 port = cevent->virtual_device; - - if (port >= VTTY_PORTS) { - printk(KERN_WARNING "hvc: data on invalid virtual device\n"); - return; - } - - spin_lock_irqsave(&consolelock, flags); - port_info[port].ack = event->xCorrelationToken; - spin_unlock_irqrestore(&consolelock, flags); -} - -static void hvc_config_event(struct HvLpEvent *event) -{ - struct viocharlpevent *cevent = (struct viocharlpevent *)event; - - if (cevent->data[0] == 0x01) - printk(KERN_INFO "hvc: window resized to %d: %d: %d: %d\n", - cevent->data[1], cevent->data[2], - cevent->data[3], cevent->data[4]); - else - printk(KERN_WARNING "hvc: unknown config event\n"); -} - -static void hvc_handle_event(struct HvLpEvent *event) -{ - int charminor; - - if (event == NULL) - return; - - charminor = event->xSubtype & VIOMINOR_SUBTYPE_MASK; - switch (charminor) { - case viocharopen: - hvc_open_event(event); - break; - case viocharclose: - hvc_close_event(event); - break; - case viochardata: - hvc_data_event(event); - break; - case viocharack: - hvc_ack_event(event); - break; - case viocharconfig: - hvc_config_event(event); - break; - default: - if (hvlpevent_is_int(event) && hvlpevent_need_ack(event)) { - event->xRc = HvLpEvent_Rc_InvalidSubtype; - HvCallEvent_ackLpEvent(event); - } - } -} - -static int __init send_open(HvLpIndex remoteLp, void *sem) -{ - return HvCallEvent_signalLpEventFast(remoteLp, - HvLpEvent_Type_VirtualIo, - viomajorsubtype_chario | viocharopen, - HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck, - viopath_sourceinst(remoteLp), - viopath_targetinst(remoteLp), - (u64)(unsigned long)sem, VIOVERSION << 16, - 0, 0, 0, 0); -} - -static int __init hvc_vio_init(void) -{ - atomic_t wait_flag; - int rc; - - if (!firmware_has_feature(FW_FEATURE_ISERIES)) - return -EIO; - - /* +2 for fudge */ - rc = viopath_open(HvLpConfig_getPrimaryLpIndex(), - viomajorsubtype_chario, VIOCHAR_WINDOW + 2); - if (rc) - printk(KERN_WARNING "hvc: error opening to primary %d\n", rc); - - if (viopath_hostLp == HvLpIndexInvalid) - vio_set_hostlp(); - - /* - * And if the primary is not the same as the hosting LP, open to the - * hosting lp - */ - if ((viopath_hostLp != HvLpIndexInvalid) && - (viopath_hostLp != HvLpConfig_getPrimaryLpIndex())) { - printk(KERN_INFO "hvc: open path to hosting (%d)\n", - viopath_hostLp); - rc = viopath_open(viopath_hostLp, viomajorsubtype_chario, - VIOCHAR_WINDOW + 2); /* +2 for fudge */ - if (rc) - printk(KERN_WARNING - "error opening to partition %d: %d\n", - viopath_hostLp, rc); - } - - if (vio_setHandler(viomajorsubtype_chario, hvc_handle_event) < 0) - printk(KERN_WARNING - "hvc: error seting handler for console events!\n"); - - /* - * First, try to open the console to the hosting lp. - * Wait on a semaphore for the response. - */ - atomic_set(&wait_flag, 0); - if ((viopath_isactive(viopath_hostLp)) && - (send_open(viopath_hostLp, &wait_flag) == 0)) { - printk(KERN_INFO "hvc: hosting partition %d\n", viopath_hostLp); - while (atomic_read(&wait_flag) == 0) - mb(); - atomic_set(&wait_flag, 0); - } - - /* - * If we don't have an active console, try the primary - */ - if ((!viopath_isactive(port_info[0].lp)) && - (viopath_isactive(HvLpConfig_getPrimaryLpIndex())) && - (send_open(HvLpConfig_getPrimaryLpIndex(), &wait_flag) == 0)) { - printk(KERN_INFO "hvc: opening console to primary partition\n"); - while (atomic_read(&wait_flag) == 0) - mb(); - } - - /* Register as a vio device to receive callbacks */ - rc = vio_register_driver(&hvc_vio_driver); - - return rc; -} -module_init(hvc_vio_init); /* after drivers/char/hvc_console.c */ - -static void __exit hvc_vio_exit(void) -{ - vio_unregister_driver(&hvc_vio_driver); -} -module_exit(hvc_vio_exit); - -/* the device tree order defines our numbering */ -static int __init hvc_find_vtys(void) -{ - struct device_node *vty; - int num_found = 0; - - for (vty = of_find_node_by_name(NULL, "vty"); vty != NULL; - vty = of_find_node_by_name(vty, "vty")) { - const uint32_t *vtermno; - - /* We have statically defined space for only a certain number - * of console adapters. - */ - if ((num_found >= MAX_NR_HVC_CONSOLES) || - (num_found >= VTTY_PORTS)) { - of_node_put(vty); - break; - } - - vtermno = of_get_property(vty, "reg", NULL); - if (!vtermno) - continue; - - if (!of_device_is_compatible(vty, "IBM,iSeries-vty")) - continue; - - if (num_found == 0) - add_preferred_console("hvc", 0, NULL); - hvc_instantiate(*vtermno, num_found, &hvc_get_put_ops); - ++num_found; - } - - return num_found; -} -console_initcall(hvc_find_vtys); diff --git a/drivers/tty/hvc/hvc_rtas.c b/drivers/tty/hvc/hvc_rtas.c index 61c4a61..0069bb8 100644 --- a/drivers/tty/hvc/hvc_rtas.c +++ b/drivers/tty/hvc/hvc_rtas.c @@ -94,7 +94,7 @@ static int __init hvc_rtas_init(void) /* Allocate an hvc_struct for the console device we instantiated * earlier. Save off hp so that we can return it on exit */ - hp = hvc_alloc(hvc_rtas_cookie, NO_IRQ, &hvc_rtas_get_put_ops, 16); + hp = hvc_alloc(hvc_rtas_cookie, 0, &hvc_rtas_get_put_ops, 16); if (IS_ERR(hp)) return PTR_ERR(hp); diff --git a/drivers/tty/hvc/hvc_udbg.c b/drivers/tty/hvc/hvc_udbg.c index b0957e6..7222827 100644 --- a/drivers/tty/hvc/hvc_udbg.c +++ b/drivers/tty/hvc/hvc_udbg.c @@ -36,7 +36,7 @@ static int hvc_udbg_put(uint32_t vtermno, const char *buf, int count) { int i; - for (i = 0; i < count; i++) + for (i = 0; i < count && udbg_putc; i++) udbg_putc(buf[i]); return i; @@ -67,9 +67,12 @@ static int __init hvc_udbg_init(void) { struct hvc_struct *hp; + if (!udbg_putc) + return -ENODEV; + BUG_ON(hvc_udbg_dev); - hp = hvc_alloc(0, NO_IRQ, &hvc_udbg_ops, 16); + hp = hvc_alloc(0, 0, &hvc_udbg_ops, 16); if (IS_ERR(hp)) return PTR_ERR(hp); @@ -88,6 +91,9 @@ module_exit(hvc_udbg_exit); static int __init hvc_udbg_console_init(void) { + if (!udbg_putc) + return -ENODEV; + hvc_instantiate(0, 0, &hvc_udbg_ops); add_preferred_console("hvc", 0, NULL); diff --git a/drivers/tty/hvc/hvc_vio.c b/drivers/tty/hvc/hvc_vio.c index fc3c3ad..ee30779 100644 --- a/drivers/tty/hvc/hvc_vio.c +++ b/drivers/tty/hvc/hvc_vio.c @@ -46,7 +46,6 @@ #include <asm/hvconsole.h> #include <asm/vio.h> #include <asm/prom.h> -#include <asm/firmware.h> #include <asm/hvsi.h> #include <asm/udbg.h> @@ -311,20 +310,14 @@ static int __devexit hvc_vio_remove(struct vio_dev *vdev) static struct vio_driver hvc_vio_driver = { .id_table = hvc_driver_table, .probe = hvc_vio_probe, - .remove = __devexit_p(hvc_vio_remove), - .driver = { - .name = hvc_driver_name, - .owner = THIS_MODULE, - } + .remove = hvc_vio_remove, + .name = hvc_driver_name, }; static int __init hvc_vio_init(void) { int rc; - if (firmware_has_feature(FW_FEATURE_ISERIES)) - return -EIO; - /* Register as a vio device to receive callbacks */ rc = vio_register_driver(&hvc_vio_driver); diff --git a/drivers/tty/hvc/hvc_xen.c b/drivers/tty/hvc/hvc_xen.c index 52fdf60..83d5c88 100644 --- a/drivers/tty/hvc/hvc_xen.c +++ b/drivers/tty/hvc/hvc_xen.c @@ -23,44 +23,74 @@ #include <linux/err.h> #include <linux/init.h> #include <linux/types.h> +#include <linux/list.h> +#include <asm/io.h> #include <asm/xen/hypervisor.h> #include <xen/xen.h> +#include <xen/interface/xen.h> +#include <xen/hvm.h> +#include <xen/grant_table.h> #include <xen/page.h> #include <xen/events.h> #include <xen/interface/io/console.h> #include <xen/hvc-console.h> +#include <xen/xenbus.h> #include "hvc_console.h" #define HVC_COOKIE 0x58656e /* "Xen" in hex */ -static struct hvc_struct *hvc; -static int xencons_irq; +struct xencons_info { + struct list_head list; + struct xenbus_device *xbdev; + struct xencons_interface *intf; + unsigned int evtchn; + struct hvc_struct *hvc; + int irq; + int vtermno; + grant_ref_t gntref; +}; + +static LIST_HEAD(xenconsoles); +static DEFINE_SPINLOCK(xencons_lock); /* ------------------------------------------------------------------ */ -static unsigned long console_pfn = ~0ul; +static struct xencons_info *vtermno_to_xencons(int vtermno) +{ + struct xencons_info *entry, *n, *ret = NULL; + + if (list_empty(&xenconsoles)) + return NULL; + + list_for_each_entry_safe(entry, n, &xenconsoles, list) { + if (entry->vtermno == vtermno) { + ret = entry; + break; + } + } + + return ret; +} -static inline struct xencons_interface *xencons_interface(void) +static inline int xenbus_devid_to_vtermno(int devid) { - if (console_pfn == ~0ul) - return mfn_to_virt(xen_start_info->console.domU.mfn); - else - return __va(console_pfn << PAGE_SHIFT); + return devid + HVC_COOKIE; } -static inline void notify_daemon(void) +static inline void notify_daemon(struct xencons_info *cons) { /* Use evtchn: this is called early, before irq is set up. */ - notify_remote_via_evtchn(xen_start_info->console.domU.evtchn); + notify_remote_via_evtchn(cons->evtchn); } -static int __write_console(const char *data, int len) +static int __write_console(struct xencons_info *xencons, + const char *data, int len) { - struct xencons_interface *intf = xencons_interface(); XENCONS_RING_IDX cons, prod; + struct xencons_interface *intf = xencons->intf; int sent = 0; cons = intf->out_cons; @@ -75,13 +105,16 @@ static int __write_console(const char *data, int len) intf->out_prod = prod; if (sent) - notify_daemon(); + notify_daemon(xencons); return sent; } static int domU_write_console(uint32_t vtermno, const char *data, int len) { int ret = len; + struct xencons_info *cons = vtermno_to_xencons(vtermno); + if (cons == NULL) + return -EINVAL; /* * Make sure the whole buffer is emitted, polling if @@ -90,7 +123,7 @@ static int domU_write_console(uint32_t vtermno, const char *data, int len) * kernel is crippled. */ while (len) { - int sent = __write_console(data, len); + int sent = __write_console(cons, data, len); data += sent; len -= sent; @@ -104,9 +137,13 @@ static int domU_write_console(uint32_t vtermno, const char *data, int len) static int domU_read_console(uint32_t vtermno, char *buf, int len) { - struct xencons_interface *intf = xencons_interface(); + struct xencons_interface *intf; XENCONS_RING_IDX cons, prod; int recv = 0; + struct xencons_info *xencons = vtermno_to_xencons(vtermno); + if (xencons == NULL) + return -EINVAL; + intf = xencons->intf; cons = intf->in_cons; prod = intf->in_prod; @@ -119,7 +156,7 @@ static int domU_read_console(uint32_t vtermno, char *buf, int len) mb(); /* read ring before consuming */ intf->in_cons = cons; - notify_daemon(); + notify_daemon(xencons); return recv; } @@ -157,68 +194,407 @@ static struct hv_ops dom0_hvc_ops = { .notifier_hangup = notifier_hangup_irq, }; -static int __init xen_hvc_init(void) +static int xen_hvm_console_init(void) +{ + int r; + uint64_t v = 0; + unsigned long mfn; + struct xencons_info *info; + + if (!xen_hvm_domain()) + return -ENODEV; + + info = vtermno_to_xencons(HVC_COOKIE); + if (!info) { + info = kzalloc(sizeof(struct xencons_info), GFP_KERNEL | __GFP_ZERO); + if (!info) + return -ENOMEM; + } + + /* already configured */ + if (info->intf != NULL) + return 0; + + r = hvm_get_parameter(HVM_PARAM_CONSOLE_EVTCHN, &v); + if (r < 0) { + kfree(info); + return -ENODEV; + } + info->evtchn = v; + hvm_get_parameter(HVM_PARAM_CONSOLE_PFN, &v); + if (r < 0) { + kfree(info); + return -ENODEV; + } + mfn = v; + info->intf = ioremap(mfn << PAGE_SHIFT, PAGE_SIZE); + if (info->intf == NULL) { + kfree(info); + return -ENODEV; + } + info->vtermno = HVC_COOKIE; + + spin_lock(&xencons_lock); + list_add_tail(&info->list, &xenconsoles); + spin_unlock(&xencons_lock); + + return 0; +} + +static int xen_pv_console_init(void) { - struct hvc_struct *hp; - struct hv_ops *ops; + struct xencons_info *info; if (!xen_pv_domain()) return -ENODEV; - if (xen_initial_domain()) { - ops = &dom0_hvc_ops; - xencons_irq = bind_virq_to_irq(VIRQ_CONSOLE, 0); - } else { - if (!xen_start_info->console.domU.evtchn) - return -ENODEV; + if (!xen_start_info->console.domU.evtchn) + return -ENODEV; - ops = &domU_hvc_ops; - xencons_irq = bind_evtchn_to_irq(xen_start_info->console.domU.evtchn); + info = vtermno_to_xencons(HVC_COOKIE); + if (!info) { + info = kzalloc(sizeof(struct xencons_info), GFP_KERNEL | __GFP_ZERO); + if (!info) + return -ENOMEM; } - if (xencons_irq < 0) - xencons_irq = 0; /* NO_IRQ */ - else - irq_set_noprobe(xencons_irq); - hp = hvc_alloc(HVC_COOKIE, xencons_irq, ops, 256); - if (IS_ERR(hp)) - return PTR_ERR(hp); + /* already configured */ + if (info->intf != NULL) + return 0; + + info->evtchn = xen_start_info->console.domU.evtchn; + info->intf = mfn_to_virt(xen_start_info->console.domU.mfn); + info->vtermno = HVC_COOKIE; + + spin_lock(&xencons_lock); + list_add_tail(&info->list, &xenconsoles); + spin_unlock(&xencons_lock); + + return 0; +} + +static int xen_initial_domain_console_init(void) +{ + struct xencons_info *info; + + if (!xen_initial_domain()) + return -ENODEV; + + info = vtermno_to_xencons(HVC_COOKIE); + if (!info) { + info = kzalloc(sizeof(struct xencons_info), GFP_KERNEL | __GFP_ZERO); + if (!info) + return -ENOMEM; + } - hvc = hp; + info->irq = bind_virq_to_irq(VIRQ_CONSOLE, 0); + info->vtermno = HVC_COOKIE; - console_pfn = mfn_to_pfn(xen_start_info->console.domU.mfn); + spin_lock(&xencons_lock); + list_add_tail(&info->list, &xenconsoles); + spin_unlock(&xencons_lock); return 0; } void xen_console_resume(void) { - if (xencons_irq) - rebind_evtchn_irq(xen_start_info->console.domU.evtchn, xencons_irq); + struct xencons_info *info = vtermno_to_xencons(HVC_COOKIE); + if (info != NULL && info->irq) + rebind_evtchn_irq(info->evtchn, info->irq); +} + +static void xencons_disconnect_backend(struct xencons_info *info) +{ + if (info->irq > 0) + unbind_from_irqhandler(info->irq, NULL); + info->irq = 0; + if (info->evtchn > 0) + xenbus_free_evtchn(info->xbdev, info->evtchn); + info->evtchn = 0; + if (info->gntref > 0) + gnttab_free_grant_references(info->gntref); + info->gntref = 0; + if (info->hvc != NULL) + hvc_remove(info->hvc); + info->hvc = NULL; +} + +static void xencons_free(struct xencons_info *info) +{ + free_page((unsigned long)info->intf); + info->intf = NULL; + info->vtermno = 0; + kfree(info); +} + +static int xen_console_remove(struct xencons_info *info) +{ + xencons_disconnect_backend(info); + spin_lock(&xencons_lock); + list_del(&info->list); + spin_unlock(&xencons_lock); + if (info->xbdev != NULL) + xencons_free(info); + else { + if (xen_hvm_domain()) + iounmap(info->intf); + kfree(info); + } + return 0; +} + +#ifdef CONFIG_HVC_XEN_FRONTEND +static struct xenbus_driver xencons_driver; + +static int xencons_remove(struct xenbus_device *dev) +{ + return xen_console_remove(dev_get_drvdata(&dev->dev)); +} + +static int xencons_connect_backend(struct xenbus_device *dev, + struct xencons_info *info) +{ + int ret, evtchn, devid, ref, irq; + struct xenbus_transaction xbt; + grant_ref_t gref_head; + unsigned long mfn; + + ret = xenbus_alloc_evtchn(dev, &evtchn); + if (ret) + return ret; + info->evtchn = evtchn; + irq = bind_evtchn_to_irq(evtchn); + if (irq < 0) + return irq; + info->irq = irq; + devid = dev->nodename[strlen(dev->nodename) - 1] - '0'; + info->hvc = hvc_alloc(xenbus_devid_to_vtermno(devid), + irq, &domU_hvc_ops, 256); + if (IS_ERR(info->hvc)) + return PTR_ERR(info->hvc); + if (xen_pv_domain()) + mfn = virt_to_mfn(info->intf); + else + mfn = __pa(info->intf) >> PAGE_SHIFT; + ret = gnttab_alloc_grant_references(1, &gref_head); + if (ret < 0) + return ret; + info->gntref = gref_head; + ref = gnttab_claim_grant_reference(&gref_head); + if (ref < 0) + return ref; + gnttab_grant_foreign_access_ref(ref, info->xbdev->otherend_id, + mfn, 0); + + again: + ret = xenbus_transaction_start(&xbt); + if (ret) { + xenbus_dev_fatal(dev, ret, "starting transaction"); + return ret; + } + ret = xenbus_printf(xbt, dev->nodename, "ring-ref", "%d", ref); + if (ret) + goto error_xenbus; + ret = xenbus_printf(xbt, dev->nodename, "port", "%u", + evtchn); + if (ret) + goto error_xenbus; + ret = xenbus_printf(xbt, dev->nodename, "type", "ioemu"); + if (ret) + goto error_xenbus; + ret = xenbus_transaction_end(xbt, 0); + if (ret) { + if (ret == -EAGAIN) + goto again; + xenbus_dev_fatal(dev, ret, "completing transaction"); + return ret; + } + + xenbus_switch_state(dev, XenbusStateInitialised); + return 0; + + error_xenbus: + xenbus_transaction_end(xbt, 1); + xenbus_dev_fatal(dev, ret, "writing xenstore"); + return ret; +} + +static int __devinit xencons_probe(struct xenbus_device *dev, + const struct xenbus_device_id *id) +{ + int ret, devid; + struct xencons_info *info; + + devid = dev->nodename[strlen(dev->nodename) - 1] - '0'; + if (devid == 0) + return -ENODEV; + + info = kzalloc(sizeof(struct xencons_info), GFP_KERNEL | __GFP_ZERO); + if (!info) + goto error_nomem; + dev_set_drvdata(&dev->dev, info); + info->xbdev = dev; + info->vtermno = xenbus_devid_to_vtermno(devid); + info->intf = (void *)__get_free_page(GFP_KERNEL | __GFP_ZERO); + if (!info->intf) + goto error_nomem; + + ret = xencons_connect_backend(dev, info); + if (ret < 0) + goto error; + spin_lock(&xencons_lock); + list_add_tail(&info->list, &xenconsoles); + spin_unlock(&xencons_lock); + + return 0; + + error_nomem: + ret = -ENOMEM; + xenbus_dev_fatal(dev, ret, "allocating device memory"); + error: + xencons_disconnect_backend(info); + xencons_free(info); + return ret; +} + +static int xencons_resume(struct xenbus_device *dev) +{ + struct xencons_info *info = dev_get_drvdata(&dev->dev); + + xencons_disconnect_backend(info); + memset(info->intf, 0, PAGE_SIZE); + return xencons_connect_backend(dev, info); +} + +static void xencons_backend_changed(struct xenbus_device *dev, + enum xenbus_state backend_state) +{ + switch (backend_state) { + case XenbusStateReconfiguring: + case XenbusStateReconfigured: + case XenbusStateInitialising: + case XenbusStateInitialised: + case XenbusStateUnknown: + case XenbusStateClosed: + break; + + case XenbusStateInitWait: + break; + + case XenbusStateConnected: + xenbus_switch_state(dev, XenbusStateConnected); + break; + + case XenbusStateClosing: + xenbus_frontend_closed(dev); + break; + } +} + +static const struct xenbus_device_id xencons_ids[] = { + { "console" }, + { "" } +}; + + +static DEFINE_XENBUS_DRIVER(xencons, "xenconsole", + .probe = xencons_probe, + .remove = xencons_remove, + .resume = xencons_resume, + .otherend_changed = xencons_backend_changed, +); +#endif /* CONFIG_HVC_XEN_FRONTEND */ + +static int __init xen_hvc_init(void) +{ + int r; + struct xencons_info *info; + const struct hv_ops *ops; + + if (!xen_domain()) + return -ENODEV; + + if (xen_initial_domain()) { + ops = &dom0_hvc_ops; + r = xen_initial_domain_console_init(); + if (r < 0) + return r; + info = vtermno_to_xencons(HVC_COOKIE); + } else { + ops = &domU_hvc_ops; + if (xen_hvm_domain()) + r = xen_hvm_console_init(); + else + r = xen_pv_console_init(); + if (r < 0) + return r; + + info = vtermno_to_xencons(HVC_COOKIE); + info->irq = bind_evtchn_to_irq(info->evtchn); + } + if (info->irq < 0) + info->irq = 0; /* NO_IRQ */ + else + irq_set_noprobe(info->irq); + + info->hvc = hvc_alloc(HVC_COOKIE, info->irq, ops, 256); + if (IS_ERR(info->hvc)) { + r = PTR_ERR(info->hvc); + spin_lock(&xencons_lock); + list_del(&info->list); + spin_unlock(&xencons_lock); + if (info->irq) + unbind_from_irqhandler(info->irq, NULL); + kfree(info); + return r; + } + + r = 0; +#ifdef CONFIG_HVC_XEN_FRONTEND + r = xenbus_register_frontend(&xencons_driver); +#endif + return r; } static void __exit xen_hvc_fini(void) { - if (hvc) - hvc_remove(hvc); + struct xencons_info *entry, *next; + + if (list_empty(&xenconsoles)) + return; + + list_for_each_entry_safe(entry, next, &xenconsoles, list) { + xen_console_remove(entry); + } } static int xen_cons_init(void) { - struct hv_ops *ops; + const struct hv_ops *ops; - if (!xen_pv_domain()) + if (!xen_domain()) return 0; if (xen_initial_domain()) ops = &dom0_hvc_ops; - else + else { + int r; ops = &domU_hvc_ops; + if (xen_hvm_domain()) + r = xen_hvm_console_init(); + else + r = xen_pv_console_init(); + if (r < 0) + return r; + } + hvc_instantiate(HVC_COOKIE, 0, ops); return 0; } + module_init(xen_hvc_init); module_exit(xen_hvc_fini); console_initcall(xen_cons_init); @@ -230,6 +606,9 @@ static void xenboot_write_console(struct console *console, const char *string, unsigned int linelen, off = 0; const char *pos; + if (!xen_pv_domain()) + return; + dom0_write_console(0, string, len); if (xen_initial_domain()) diff --git a/drivers/tty/hvc/hvcs.c b/drivers/tty/hvc/hvcs.c index b9040be..3436436 100644 --- a/drivers/tty/hvc/hvcs.c +++ b/drivers/tty/hvc/hvcs.c @@ -879,10 +879,7 @@ static struct vio_driver hvcs_vio_driver = { .id_table = hvcs_driver_table, .probe = hvcs_probe, .remove = __devexit_p(hvcs_remove), - .driver = { - .name = hvcs_driver_name, - .owner = THIS_MODULE, - } + .name = hvcs_driver_name, }; /* Only called from hvcs_get_pi please */ @@ -1090,27 +1087,23 @@ static int hvcs_enable_device(struct hvcs_struct *hvcsd, uint32_t unit_address, */ static struct hvcs_struct *hvcs_get_by_index(int index) { - struct hvcs_struct *hvcsd = NULL; + struct hvcs_struct *hvcsd; unsigned long flags; spin_lock(&hvcs_structs_lock); - /* We can immediately discard OOB requests */ - if (index >= 0 && index < HVCS_MAX_SERVER_ADAPTERS) { - list_for_each_entry(hvcsd, &hvcs_structs, next) { - spin_lock_irqsave(&hvcsd->lock, flags); - if (hvcsd->index == index) { - kref_get(&hvcsd->kref); - spin_unlock_irqrestore(&hvcsd->lock, flags); - spin_unlock(&hvcs_structs_lock); - return hvcsd; - } + list_for_each_entry(hvcsd, &hvcs_structs, next) { + spin_lock_irqsave(&hvcsd->lock, flags); + if (hvcsd->index == index) { + kref_get(&hvcsd->kref); spin_unlock_irqrestore(&hvcsd->lock, flags); + spin_unlock(&hvcs_structs_lock); + return hvcsd; } - hvcsd = NULL; + spin_unlock_irqrestore(&hvcsd->lock, flags); } - spin_unlock(&hvcs_structs_lock); - return hvcsd; + + return NULL; } /* @@ -1203,7 +1196,7 @@ static void hvcs_close(struct tty_struct *tty, struct file *filp) { struct hvcs_struct *hvcsd; unsigned long flags; - int irq = NO_IRQ; + int irq; /* * Is someone trying to close the file associated with this device after @@ -1264,7 +1257,7 @@ static void hvcs_hangup(struct tty_struct * tty) struct hvcs_struct *hvcsd = tty->driver_data; unsigned long flags; int temp_open_count; - int irq = NO_IRQ; + int irq; spin_lock_irqsave(&hvcsd->lock, flags); /* Preserve this so that we know how many kref refs to put */ @@ -1499,8 +1492,6 @@ static int __devinit hvcs_initialize(void) goto index_fail; } - hvcs_tty_driver->owner = THIS_MODULE; - hvcs_tty_driver->driver_name = hvcs_driver_name; hvcs_tty_driver->name = hvcs_device_node; diff --git a/drivers/tty/hvc/hvsi.c b/drivers/tty/hvc/hvsi.c index cdfa3e0..a7488b7 100644 --- a/drivers/tty/hvc/hvsi.c +++ b/drivers/tty/hvc/hvsi.c @@ -737,14 +737,11 @@ static int hvsi_open(struct tty_struct *tty, struct file *filp) { struct hvsi_struct *hp; unsigned long flags; - int line = tty->index; int ret; pr_debug("%s\n", __func__); - if (line < 0 || line >= hvsi_count) - return -ENODEV; - hp = &hvsi_ports[line]; + hp = &hvsi_ports[tty->index]; tty->driver_data = hp; @@ -1088,7 +1085,6 @@ static int __init hvsi_init(void) if (!hvsi_driver) return -ENOMEM; - hvsi_driver->owner = THIS_MODULE; hvsi_driver->driver_name = "hvsi"; hvsi_driver->name = "hvsi"; hvsi_driver->major = HVSI_MAJOR; @@ -1237,7 +1233,7 @@ static int __init hvsi_console_init(void) hp->state = HVSI_CLOSED; hp->vtermno = *vtermno; hp->virq = irq_create_mapping(NULL, irq[0]); - if (hp->virq == NO_IRQ) { + if (hp->virq == 0) { printk(KERN_ERR "%s: couldn't create irq mapping for 0x%x\n", __func__, irq[0]); continue; |