From 7465ce0db310d2fa29f721da7e3aacd1dad7090f Mon Sep 17 00:00:00 2001
From: Stephen Rothwell <sfr@canb.auug.org.au>
Date: Thu, 11 Oct 2007 14:58:31 +1000
Subject: [POWERPC] iSeries: Move detection of virtual tapes
Now we will only have entries in the device tree for the actual existing
devices (including their OS/400 properties). This way viotape.c gets
all the information about the devices from the device tree.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
---
arch/powerpc/platforms/iseries/dt.c | 7 --
arch/powerpc/platforms/iseries/vio.c | 149 +++++++++++++++++++++++++++++++----
2 files changed, 133 insertions(+), 23 deletions(-)
(limited to 'arch')
diff --git a/arch/powerpc/platforms/iseries/dt.c b/arch/powerpc/platforms/iseries/dt.c
index 84fcee15eb..2e4ad6b345 100644
--- a/arch/powerpc/platforms/iseries/dt.c
+++ b/arch/powerpc/platforms/iseries/dt.c
@@ -73,7 +73,6 @@ static char __initdata device_type_memory[] = "memory";
static char __initdata device_type_serial[] = "serial";
static char __initdata device_type_network[] = "network";
static char __initdata device_type_block[] = "block";
-static char __initdata device_type_byte[] = "byte";
static char __initdata device_type_pci[] = "pci";
static char __initdata device_type_vdevice[] = "vdevice";
static char __initdata device_type_vscsi[] = "vscsi";
@@ -380,12 +379,6 @@ static void __init dt_vdevices(struct iseries_flat_dt *dt)
for (i = 0; i < HVMAXARCHITECTEDVIRTUALDISKS; i++)
dt_do_vdevice(dt, "viodasd", reg, i, device_type_block,
"IBM,iSeries-viodasd", 1);
- reg += HVMAXARCHITECTEDVIRTUALDISKS;
- reg += HVMAXARCHITECTEDVIRTUALCDROMS;
-
- for (i = 0; i < HVMAXARCHITECTEDVIRTUALTAPES; i++)
- dt_do_vdevice(dt, "viotape", reg, i, device_type_byte,
- "IBM,iSeries-viotape", 1);
dt_end_node(dt);
}
diff --git a/arch/powerpc/platforms/iseries/vio.c b/arch/powerpc/platforms/iseries/vio.c
index f61a97441c..a4cc990a26 100644
--- a/arch/powerpc/platforms/iseries/vio.c
+++ b/arch/powerpc/platforms/iseries/vio.c
@@ -45,6 +45,18 @@
#define FIRST_VIOTAPE (FIRST_VIOCD + NUM_VIOCDS)
#define NUM_VIOTAPES HVMAXARCHITECTEDVIRTUALTAPES
+struct vio_waitevent {
+ struct completion com;
+ int rc;
+ u16 sub_result;
+};
+
+struct vio_resource {
+ char rsrcname[10];
+ char type[4];
+ char model[3];
+};
+
static struct property * __init new_property(const char *name, int length,
const void *value)
{
@@ -123,22 +135,10 @@ static int __init add_raw_property(struct device_node *np, const char *name,
return 1;
}
-struct viocd_waitevent {
- struct completion com;
- int rc;
- u16 sub_result;
-};
-
-struct cdrom_info {
- char rsrcname[10];
- char type[4];
- char model[3];
-};
-
static void __init handle_cd_event(struct HvLpEvent *event)
{
struct viocdlpevent *bevent;
- struct viocd_waitevent *pwe;
+ struct vio_waitevent *pwe;
if (!event)
/* Notification that a partition went away! */
@@ -158,7 +158,7 @@ static void __init handle_cd_event(struct HvLpEvent *event)
switch (event->xSubtype & VIOMINOR_SUBTYPE_MASK) {
case viocdgetinfo:
- pwe = (struct viocd_waitevent *)event->xCorrelationToken;
+ pwe = (struct vio_waitevent *)event->xCorrelationToken;
pwe->rc = event->xRc;
pwe->sub_result = bevent->sub_result;
complete(&pwe->com);
@@ -179,8 +179,8 @@ static void __init get_viocd_info(struct device_node *vio_root)
{
HvLpEvent_Rc hvrc;
u32 unit;
- struct viocd_waitevent we;
- struct cdrom_info *unitinfo;
+ struct vio_waitevent we;
+ struct vio_resource *unitinfo;
dma_addr_t unitinfo_dmaaddr;
int ret;
@@ -286,6 +286,122 @@ static void __init get_viocd_info(struct device_node *vio_root)
viopath_close(viopath_hostLp, viomajorsubtype_cdio, 2);
}
+/* Handle interrupt events for tape */
+static void __init handle_tape_event(struct HvLpEvent *event)
+{
+ struct vio_waitevent *we;
+ struct viotapelpevent *tevent = (struct viotapelpevent *)event;
+
+ if (event == NULL)
+ /* Notification that a partition went away! */
+ return;
+
+ we = (struct vio_waitevent *)event->xCorrelationToken;
+ switch (event->xSubtype & VIOMINOR_SUBTYPE_MASK) {
+ case viotapegetinfo:
+ we->rc = tevent->sub_type_result;
+ complete(&we->com);
+ break;
+ default:
+ printk(KERN_WARNING "handle_tape_event: weird ack\n");
+ }
+}
+
+static void __init get_viotape_info(struct device_node *vio_root)
+{
+ HvLpEvent_Rc hvrc;
+ u32 unit;
+ struct vio_resource *unitinfo;
+ dma_addr_t unitinfo_dmaaddr;
+ size_t len = sizeof(*unitinfo) * HVMAXARCHITECTEDVIRTUALTAPES;
+ struct vio_waitevent we;
+ int ret;
+
+ ret = viopath_open(viopath_hostLp, viomajorsubtype_tape, 2);
+ if (ret) {
+ printk(KERN_WARNING "get_viotape_info: "
+ "error on viopath_open to hostlp %d\n", ret);
+ return;
+ }
+
+ vio_setHandler(viomajorsubtype_tape, handle_tape_event);
+
+ unitinfo = iseries_hv_alloc(len, &unitinfo_dmaaddr, GFP_ATOMIC);
+ if (!unitinfo)
+ goto clear_handler;
+
+ memset(unitinfo, 0, len);
+
+ hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp,
+ HvLpEvent_Type_VirtualIo,
+ viomajorsubtype_tape | viotapegetinfo,
+ HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck,
+ viopath_sourceinst(viopath_hostLp),
+ viopath_targetinst(viopath_hostLp),
+ (u64)(unsigned long)&we, VIOVERSION << 16,
+ unitinfo_dmaaddr, len, 0, 0);
+ if (hvrc != HvLpEvent_Rc_Good) {
+ printk(KERN_WARNING "get_viotape_info: hv error on op %d\n",
+ (int)hvrc);
+ goto hv_free;
+ }
+
+ wait_for_completion(&we.com);
+
+ for (unit = 0; (unit < HVMAXARCHITECTEDVIRTUALTAPES) &&
+ unitinfo[unit].rsrcname[0]; unit++) {
+ struct device_node *np;
+ char name[64];
+ u32 reg = FIRST_VIOTAPE + unit;
+
+ snprintf(name, sizeof(name), "/vdevice/viotape@%08x", reg);
+ np = new_node(name, vio_root);
+ if (!np)
+ goto hv_free;
+ if (!add_string_property(np, "name", "viotape") ||
+ !add_string_property(np, "device_type", "byte") ||
+ !add_string_property(np, "compatible",
+ "IBM,iSeries-viotape") ||
+ !add_raw_property(np, "reg", sizeof(reg), ®) ||
+ !add_raw_property(np, "linux,unit_address",
+ sizeof(unit), &unit) ||
+ !add_raw_property(np, "linux,vio_rsrcname",
+ sizeof(unitinfo[unit].rsrcname),
+ unitinfo[unit].rsrcname) ||
+ !add_raw_property(np, "linux,vio_type",
+ sizeof(unitinfo[unit].type),
+ unitinfo[unit].type) ||
+ !add_raw_property(np, "linux,vio_model",
+ sizeof(unitinfo[unit].model),
+ unitinfo[unit].model))
+ goto node_free;
+ np->name = of_get_property(np, "name", NULL);
+ np->type = of_get_property(np, "device_type", NULL);
+ of_attach_node(np);
+#ifdef CONFIG_PROC_DEVICETREE
+ if (vio_root->pde) {
+ struct proc_dir_entry *ent;
+
+ ent = proc_mkdir(strrchr(np->full_name, '/') + 1,
+ vio_root->pde);
+ if (ent)
+ proc_device_tree_add_node(np, ent);
+ }
+#endif
+ continue;
+
+ node_free:
+ free_node(np);
+ break;
+ }
+
+ hv_free:
+ iseries_hv_free(len, unitinfo, unitinfo_dmaaddr);
+ clear_handler:
+ vio_clearHandler(viomajorsubtype_tape);
+ viopath_close(viopath_hostLp, viomajorsubtype_tape, 2);
+}
+
static int __init iseries_vio_init(void)
{
struct device_node *vio_root;
@@ -307,6 +423,7 @@ static int __init iseries_vio_init(void)
}
get_viocd_info(vio_root);
+ get_viotape_info(vio_root);
return 0;
--
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