tty: powerpc: remove hvc_iseries
authorStephen Rothwell <sfr@canb.auug.org.au>
Wed, 7 Mar 2012 18:37:40 +0000 (18:37 +0000)
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>
Thu, 8 Mar 2012 23:35:17 +0000 (10:35 +1100)
The PowerPC legacy iSeries platform is being removed, so this code is no
longer needed.

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
drivers/tty/hvc/Kconfig
drivers/tty/hvc/Makefile
drivers/tty/hvc/hvc_iseries.c [deleted file]

index 4222035acfb71987a7f3f7c50db32cd5aae87262..8ea7f078b233d7518d331e4a99acd15702a410d5 100644 (file)
@@ -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
index 89abf40bc73d3bd30c8d363e5224e3b2ef7a9927..4ca3723b0a3afb299a0eb679f14b1e6b42e12781 100644 (file)
@@ -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_iseries.c b/drivers/tty/hvc/hvc_iseries.c
deleted file mode 100644 (file)
index 3f4a897..0000000
+++ /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);