#include <linux/gfp.h>
#include <linux/completion.h>
#include <linux/proc_fs.h>
+#include <linux/module.h>
#include <asm/firmware.h>
+#include <asm/vio.h>
#include <asm/iseries/vio.h>
#include <asm/iseries/iommu.h>
#include <asm/iseries/hv_types.h>
char model[3];
};
-static struct property * __init new_property(const char *name, int length,
+static struct property *new_property(const char *name, int length,
const void *value)
{
struct property *np = kzalloc(sizeof(*np) + strlen(name) + 1 + length,
kfree(np);
}
-static struct device_node * __init new_node(const char *path,
+static struct device_node *new_node(const char *path,
struct device_node *parent)
{
struct device_node *np = kzalloc(sizeof(*np), GFP_KERNEL);
return np;
}
-static void __init free_node(struct device_node *np)
+static void free_node(struct device_node *np)
{
struct property *next;
struct property *prop;
kfree(np);
}
-static int __init add_string_property(struct device_node *np, const char *name,
+static int add_string_property(struct device_node *np, const char *name,
const char *value)
{
struct property *nprop = new_property(name, strlen(value) + 1, value);
return 1;
}
-static int __init add_raw_property(struct device_node *np, const char *name,
+static int add_raw_property(struct device_node *np, const char *name,
int length, const void *value)
{
struct property *nprop = new_property(name, length, value);
return 1;
}
+static struct device_node *do_device_node(struct device_node *parent,
+ const char *name, u32 reg, u32 unit, const char *type,
+ const char *compat, struct vio_resource *res)
+{
+ struct device_node *np;
+ char path[32];
+
+ snprintf(path, sizeof(path), "/vdevice/%s@%08x", name, reg);
+ np = new_node(path, parent);
+ if (!np)
+ return NULL;
+ if (!add_string_property(np, "name", name) ||
+ !add_string_property(np, "device_type", type) ||
+ !add_string_property(np, "compatible", compat) ||
+ !add_raw_property(np, "reg", sizeof(reg), ®) ||
+ !add_raw_property(np, "linux,unit_address",
+ sizeof(unit), &unit)) {
+ goto node_free;
+ }
+ if (res) {
+ if (!add_raw_property(np, "linux,vio_rsrcname",
+ sizeof(res->rsrcname), res->rsrcname) ||
+ !add_raw_property(np, "linux,vio_type",
+ sizeof(res->type), res->type) ||
+ !add_raw_property(np, "linux,vio_model",
+ sizeof(res->model), res->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 (parent->pde) {
+ struct proc_dir_entry *ent;
+
+ ent = proc_mkdir(strrchr(np->full_name, '/') + 1, parent->pde);
+ if (ent)
+ proc_device_tree_add_node(np, ent);
+ }
+#endif
+ return np;
+
+ node_free:
+ free_node(np);
+ return NULL;
+}
+
+/*
+ * This is here so that we can dynamically add viodasd
+ * devices without exposing all the above infrastructure.
+ */
+struct vio_dev *vio_create_viodasd(u32 unit)
+{
+ struct device_node *vio_root;
+ struct device_node *np;
+ struct vio_dev *vdev = NULL;
+
+ vio_root = of_find_node_by_path("/vdevice");
+ if (!vio_root)
+ return NULL;
+ np = do_device_node(vio_root, "viodasd", FIRST_VIODASD + unit, unit,
+ "block", "IBM,iSeries-viodasd", NULL);
+ of_node_put(vio_root);
+ if (np) {
+ vdev = vio_register_device_node(np);
+ if (!vdev)
+ free_node(np);
+ }
+ return vdev;
+}
+EXPORT_SYMBOL_GPL(vio_create_viodasd);
+
+static void __init handle_block_event(struct HvLpEvent *event)
+{
+ struct vioblocklpevent *bevent = (struct vioblocklpevent *)event;
+ struct vio_waitevent *pwe;
+
+ if (event == NULL)
+ /* Notification that a partition went away! */
+ return;
+ /* First, we should NEVER get an int here...only acks */
+ if (hvlpevent_is_int(event)) {
+ printk(KERN_WARNING "handle_viod_request: "
+ "Yikes! got an int in viodasd event handler!\n");
+ if (hvlpevent_need_ack(event)) {
+ event->xRc = HvLpEvent_Rc_InvalidSubtype;
+ HvCallEvent_ackLpEvent(event);
+ }
+ return;
+ }
+
+ switch (event->xSubtype & VIOMINOR_SUBTYPE_MASK) {
+ case vioblockopen:
+ /*
+ * Handle a response to an open request. We get all the
+ * disk information in the response, so update it. The
+ * correlation token contains a pointer to a waitevent
+ * structure that has a completion in it. update the
+ * return code in the waitevent structure and post the
+ * completion to wake up the guy who sent the request
+ */
+ pwe = (struct vio_waitevent *)event->xCorrelationToken;
+ pwe->rc = event->xRc;
+ pwe->sub_result = bevent->sub_result;
+ complete(&pwe->com);
+ break;
+ case vioblockclose:
+ break;
+ default:
+ printk(KERN_WARNING "handle_viod_request: unexpected subtype!");
+ if (hvlpevent_need_ack(event)) {
+ event->xRc = HvLpEvent_Rc_InvalidSubtype;
+ HvCallEvent_ackLpEvent(event);
+ }
+ }
+}
+
+static void __init probe_disk(struct device_node *vio_root, u32 unit)
+{
+ HvLpEvent_Rc hvrc;
+ struct vio_waitevent we;
+ u16 flags = 0;
+
+retry:
+ init_completion(&we.com);
+
+ /* Send the open event to OS/400 */
+ hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp,
+ HvLpEvent_Type_VirtualIo,
+ viomajorsubtype_blockio | vioblockopen,
+ HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck,
+ viopath_sourceinst(viopath_hostLp),
+ viopath_targetinst(viopath_hostLp),
+ (u64)(unsigned long)&we, VIOVERSION << 16,
+ ((u64)unit << 48) | ((u64)flags<< 32),
+ 0, 0, 0);
+ if (hvrc != 0) {
+ printk(KERN_WARNING "probe_disk: bad rc on HV open %d\n",
+ (int)hvrc);
+ return;
+ }
+
+ wait_for_completion(&we.com);
+
+ if (we.rc != 0) {
+ if (flags != 0)
+ return;
+ /* try again with read only flag set */
+ flags = vioblockflags_ro;
+ goto retry;
+ }
+
+ /* Send the close event to OS/400. We DON'T expect a response */
+ hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp,
+ HvLpEvent_Type_VirtualIo,
+ viomajorsubtype_blockio | vioblockclose,
+ HvLpEvent_AckInd_NoAck, HvLpEvent_AckType_ImmediateAck,
+ viopath_sourceinst(viopath_hostLp),
+ viopath_targetinst(viopath_hostLp),
+ 0, VIOVERSION << 16,
+ ((u64)unit << 48) | ((u64)flags << 32),
+ 0, 0, 0);
+ if (hvrc != 0) {
+ printk(KERN_WARNING "probe_disk: "
+ "bad rc sending event to OS/400 %d\n", (int)hvrc);
+ return;
+ }
+
+ do_device_node(vio_root, "viodasd", FIRST_VIODASD + unit, unit,
+ "block", "IBM,iSeries-viodasd", NULL);
+}
+
+static void __init get_viodasd_info(struct device_node *vio_root)
+{
+ int rc;
+ u32 unit;
+
+ rc = viopath_open(viopath_hostLp, viomajorsubtype_blockio, 2);
+ if (rc) {
+ printk(KERN_WARNING "get_viodasd_info: "
+ "error opening path to host partition %d\n",
+ viopath_hostLp);
+ return;
+ }
+
+ /* Initialize our request handler */
+ vio_setHandler(viomajorsubtype_blockio, handle_block_event);
+
+ for (unit = 0; unit < HVMAXARCHITECTEDVIRTUALDISKS; unit++)
+ probe_disk(vio_root, unit);
+
+ vio_clearHandler(viomajorsubtype_blockio);
+ viopath_close(viopath_hostLp, viomajorsubtype_blockio, 2);
+}
+
static void __init handle_cd_event(struct HvLpEvent *event)
{
struct viocdlpevent *bevent;
for (unit = 0; (unit < HVMAXARCHITECTEDVIRTUALCDROMS) &&
unitinfo[unit].rsrcname[0]; unit++) {
- struct device_node *np;
- char name[64];
- u32 reg = FIRST_VIOCD + unit;
-
- snprintf(name, sizeof(name), "/vdevice/viocd@%08x", reg);
- np = new_node(name, vio_root);
- if (!np)
- goto hv_free;
- if (!add_string_property(np, "name", "viocd") ||
- !add_string_property(np, "device_type", "block") ||
- !add_string_property(np, "compatible",
- "IBM,iSeries-viocd") ||
- !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;
+ if (!do_device_node(vio_root, "viocd", FIRST_VIOCD + unit, unit,
+ "block", "IBM,iSeries-viocd", &unitinfo[unit]))
+ break;
}
hv_free:
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;
+ if (!do_device_node(vio_root, "viotape", FIRST_VIOTAPE + unit,
+ unit, "byte", "IBM,iSeries-viotape",
+ &unitinfo[unit]))
+ break;
}
hv_free:
goto put_node;
}
+ get_viodasd_info(vio_root);
get_viocd_info(vio_root);
get_viotape_info(vio_root);
projects / kernel / kernel-generic.git / commitdiff