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authorLinus Torvalds <torvalds@linux-foundation.org>2012-10-06 03:16:12 +0900
committerLinus Torvalds <torvalds@linux-foundation.org>2012-10-06 03:16:12 +0900
commit5f3d2f2e1a63679cf1c4a4210f2f1cc2f335bef6 (patch)
tree9189bd6c81fe5f982a7ae45d2f3d900176658509 /drivers/tty/hvc
parent283dbd82055eb70ff3b469f812d9c695f18c9641 (diff)
parentd900bd7366463fd96a907b2c212242e2b68b27d8 (diff)
downloadop-kernel-dev-5f3d2f2e1a63679cf1c4a4210f2f1cc2f335bef6.zip
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Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
Pull powerpc updates from Benjamin Herrenschmidt: "Some highlights in addition to the usual batch of fixes: - 64TB address space support for 64-bit processes by Aneesh Kumar - Gavin Shan did a major cleanup & re-organization of our EEH support code (IBM fancy PCI error handling & recovery infrastructure) which paves the way for supporting different platform backends, along with some rework of the PCIe code for the PowerNV platform in order to remove home made resource allocations and instead use the generic code (which is possible after some small improvements to it done by Gavin). - Uprobes support by Ananth N Mavinakayanahalli - A pile of embedded updates from Freescale folks, including new SoC and board supports, more KVM stuff including preparing for 64-bit BookE KVM support, ePAPR 1.1 updates, etc..." Fixup trivial conflicts in drivers/scsi/ipr.c * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (146 commits) powerpc/iommu: Fix multiple issues with IOMMU pools code powerpc: Fix VMX fix for memcpy case driver/mtd:IFC NAND:Initialise internal SRAM before any write powerpc/fsl-pci: use 'Header Type' to identify PCIE mode powerpc/eeh: Don't release eeh_mutex in eeh_phb_pe_get powerpc: Remove tlb batching hack for nighthawk powerpc: Set paca->data_offset = 0 for boot cpu powerpc/perf: Sample only if SIAR-Valid bit is set in P7+ powerpc/fsl-pci: fix warning when CONFIG_SWIOTLB is disabled powerpc/mpc85xx: Update interrupt handling for IFC controller powerpc/85xx: Enable USB support in p1023rds_defconfig powerpc/smp: Do not disable IPI interrupts during suspend powerpc/eeh: Fix crash on converting OF node to edev powerpc/eeh: Lock module while handling EEH event powerpc/kprobe: Don't emulate store when kprobe stwu r1 powerpc/kprobe: Complete kprobe and migrate exception frame powerpc/kprobe: Introduce a new thread flag powerpc: Remove unused __get_user64() and __put_user64() powerpc/eeh: Global mutex to protect PE tree powerpc/eeh: Remove EEH PE for normal PCI hotplug ...
Diffstat (limited to 'drivers/tty/hvc')
-rw-r--r--drivers/tty/hvc/hvc_console.c33
-rw-r--r--drivers/tty/hvc/hvc_vio.c123
2 files changed, 96 insertions, 60 deletions
diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_console.c
index 4a65299..a5dec1c 100644
--- a/drivers/tty/hvc/hvc_console.c
+++ b/drivers/tty/hvc/hvc_console.c
@@ -245,6 +245,20 @@ static void hvc_port_destruct(struct tty_port *port)
kfree(hp);
}
+static void hvc_check_console(int index)
+{
+ /* Already enabled, bail out */
+ if (hvc_console.flags & CON_ENABLED)
+ return;
+
+ /* If this index is what the user requested, then register
+ * now (setup won't fail at this point). It's ok to just
+ * call register again if previously .setup failed.
+ */
+ if (index == hvc_console.index)
+ register_console(&hvc_console);
+}
+
/*
* hvc_instantiate() is an early console discovery method which locates
* consoles * prior to the vio subsystem discovering them. Hotplugged
@@ -275,12 +289,8 @@ int hvc_instantiate(uint32_t vtermno, int index, const struct hv_ops *ops)
if (last_hvc < index)
last_hvc = index;
- /* if this index is what the user requested, then register
- * now (setup won't fail at this point). It's ok to just
- * call register again if previously .setup failed.
- */
- if (index == hvc_console.index)
- register_console(&hvc_console);
+ /* check if we need to re-register the kernel console */
+ hvc_check_console(index);
return 0;
}
@@ -877,10 +887,15 @@ struct hvc_struct *hvc_alloc(uint32_t vtermno, int data,
i = ++last_hvc;
hp->index = i;
+ cons_ops[i] = ops;
+ vtermnos[i] = vtermno;
list_add_tail(&(hp->next), &hvc_structs);
spin_unlock(&hvc_structs_lock);
+ /* check if we need to re-register the kernel console */
+ hvc_check_console(i);
+
return hp;
}
EXPORT_SYMBOL_GPL(hvc_alloc);
@@ -893,8 +908,12 @@ int hvc_remove(struct hvc_struct *hp)
tty = tty_port_tty_get(&hp->port);
spin_lock_irqsave(&hp->lock, flags);
- if (hp->index < MAX_NR_HVC_CONSOLES)
+ if (hp->index < MAX_NR_HVC_CONSOLES) {
+ console_lock();
vtermnos[hp->index] = -1;
+ cons_ops[hp->index] = NULL;
+ console_unlock();
+ }
/* Don't whack hp->irq because tty_hangup() will need to free the irq. */
diff --git a/drivers/tty/hvc/hvc_vio.c b/drivers/tty/hvc/hvc_vio.c
index ee30779..070c0ee6 100644
--- a/drivers/tty/hvc/hvc_vio.c
+++ b/drivers/tty/hvc/hvc_vio.c
@@ -230,6 +230,69 @@ static const struct hv_ops hvterm_hvsi_ops = {
.tiocmset = hvterm_hvsi_tiocmset,
};
+static void udbg_hvc_putc(char c)
+{
+ int count = -1;
+
+ if (!hvterm_privs[0])
+ return;
+
+ if (c == '\n')
+ udbg_hvc_putc('\r');
+
+ do {
+ switch(hvterm_privs[0]->proto) {
+ case HV_PROTOCOL_RAW:
+ count = hvterm_raw_put_chars(0, &c, 1);
+ break;
+ case HV_PROTOCOL_HVSI:
+ count = hvterm_hvsi_put_chars(0, &c, 1);
+ break;
+ }
+ } while(count == 0);
+}
+
+static int udbg_hvc_getc_poll(void)
+{
+ int rc = 0;
+ char c;
+
+ if (!hvterm_privs[0])
+ return -1;
+
+ switch(hvterm_privs[0]->proto) {
+ case HV_PROTOCOL_RAW:
+ rc = hvterm_raw_get_chars(0, &c, 1);
+ break;
+ case HV_PROTOCOL_HVSI:
+ rc = hvterm_hvsi_get_chars(0, &c, 1);
+ break;
+ }
+ if (!rc)
+ return -1;
+ return c;
+}
+
+static int udbg_hvc_getc(void)
+{
+ int ch;
+
+ if (!hvterm_privs[0])
+ return -1;
+
+ for (;;) {
+ ch = udbg_hvc_getc_poll();
+ if (ch == -1) {
+ /* This shouldn't be needed...but... */
+ volatile unsigned long delay;
+ for (delay=0; delay < 2000000; delay++)
+ ;
+ } else {
+ return ch;
+ }
+ }
+}
+
static int __devinit hvc_vio_probe(struct vio_dev *vdev,
const struct vio_device_id *id)
{
@@ -289,6 +352,13 @@ static int __devinit hvc_vio_probe(struct vio_dev *vdev,
return PTR_ERR(hp);
dev_set_drvdata(&vdev->dev, hp);
+ /* register udbg if it's not there already for console 0 */
+ if (hp->index == 0 && !udbg_putc) {
+ udbg_putc = udbg_hvc_putc;
+ udbg_getc = udbg_hvc_getc;
+ udbg_getc_poll = udbg_hvc_getc_poll;
+ }
+
return 0;
}
@@ -331,59 +401,6 @@ static void __exit hvc_vio_exit(void)
}
module_exit(hvc_vio_exit);
-static void udbg_hvc_putc(char c)
-{
- int count = -1;
-
- if (c == '\n')
- udbg_hvc_putc('\r');
-
- do {
- switch(hvterm_priv0.proto) {
- case HV_PROTOCOL_RAW:
- count = hvterm_raw_put_chars(0, &c, 1);
- break;
- case HV_PROTOCOL_HVSI:
- count = hvterm_hvsi_put_chars(0, &c, 1);
- break;
- }
- } while(count == 0);
-}
-
-static int udbg_hvc_getc_poll(void)
-{
- int rc = 0;
- char c;
-
- switch(hvterm_priv0.proto) {
- case HV_PROTOCOL_RAW:
- rc = hvterm_raw_get_chars(0, &c, 1);
- break;
- case HV_PROTOCOL_HVSI:
- rc = hvterm_hvsi_get_chars(0, &c, 1);
- break;
- }
- if (!rc)
- return -1;
- return c;
-}
-
-static int udbg_hvc_getc(void)
-{
- int ch;
- for (;;) {
- ch = udbg_hvc_getc_poll();
- if (ch == -1) {
- /* This shouldn't be needed...but... */
- volatile unsigned long delay;
- for (delay=0; delay < 2000000; delay++)
- ;
- } else {
- return ch;
- }
- }
-}
-
void __init hvc_vio_init_early(void)
{
struct device_node *stdout_node;
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