[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>
diff --git a/drivers/char/viotape.c b/drivers/char/viotape.c
index 064c091..f1d60f0 100644
--- a/drivers/char/viotape.c
+++ b/drivers/char/viotape.c
@@ -92,47 +92,6 @@
#define VIOTAPOP_SETPART 14
#define VIOTAPOP_UNLOAD 15
-struct viotapelpevent {
- struct HvLpEvent event;
- u32 reserved;
- u16 version;
- u16 sub_type_result;
- u16 tape;
- u16 flags;
- u32 token;
- u64 len;
- union {
- struct {
- u32 tape_op;
- u32 count;
- } op;
- struct {
- u32 type;
- u32 resid;
- u32 dsreg;
- u32 gstat;
- u32 erreg;
- u32 file_no;
- u32 block_no;
- } get_status;
- struct {
- u32 block_no;
- } get_pos;
- } u;
-};
-
-enum viotapesubtype {
- viotapeopen = 0x0001,
- viotapeclose = 0x0002,
- viotaperead = 0x0003,
- viotapewrite = 0x0004,
- viotapegetinfo = 0x0005,
- viotapeop = 0x0006,
- viotapegetpos = 0x0007,
- viotapesetpos = 0x0008,
- viotapegetstatus = 0x0009
-};
-
enum viotaperc {
viotape_InvalidRange = 0x0601,
viotape_InvalidToken = 0x0602,
@@ -223,14 +182,11 @@
#define VIOT_WRITING 2
/* Our info on the tapes */
-struct tape_descr {
- char rsrcname[10];
- char type[4];
- char model[3];
-};
-
-static struct tape_descr *viotape_unitinfo;
-static dma_addr_t viotape_unitinfo_token;
+static struct {
+ const char *rsrcname;
+ const char *type;
+ const char *model;
+} viotape_unitinfo[VIOTAPE_MAX_TAPE];
static struct mtget viomtget[VIOTAPE_MAX_TAPE];
@@ -381,53 +337,6 @@
return -err->errno;
}
-/* Get info on all tapes from OS/400 */
-static int get_viotape_info(void)
-{
- HvLpEvent_Rc hvrc;
- int i;
- size_t len = sizeof(*viotape_unitinfo) * VIOTAPE_MAX_TAPE;
- struct op_struct *op = get_op_struct();
-
- if (op == NULL)
- return -ENOMEM;
-
- viotape_unitinfo = iseries_hv_alloc(len, &viotape_unitinfo_token,
- GFP_ATOMIC);
- if (viotape_unitinfo == NULL) {
- free_op_struct(op);
- return -ENOMEM;
- }
-
- memset(viotape_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) op, VIOVERSION << 16,
- viotape_unitinfo_token, len, 0, 0);
- if (hvrc != HvLpEvent_Rc_Good) {
- printk(VIOTAPE_KERN_WARN "hv error on op %d\n",
- (int)hvrc);
- free_op_struct(op);
- return -EIO;
- }
-
- wait_for_completion(&op->com);
-
- free_op_struct(op);
-
- for (i = 0;
- ((i < VIOTAPE_MAX_TAPE) && (viotape_unitinfo[i].rsrcname[0]));
- i++)
- viotape_numdev++;
- return 0;
-}
-
-
/* Write */
static ssize_t viotap_write(struct file *file, const char *buf,
size_t count, loff_t * ppos)
@@ -899,7 +808,6 @@
tapeminor = event->xSubtype & VIOMINOR_SUBTYPE_MASK;
op = (struct op_struct *)event->xCorrelationToken;
switch (tapeminor) {
- case viotapegetinfo:
case viotapeopen:
case viotapeclose:
op->rc = tevent->sub_type_result;
@@ -942,11 +850,23 @@
{
int i = vdev->unit_address;
int j;
+ struct device_node *node = vdev->dev.archdata.of_node;
- if (i >= viotape_numdev)
+ if (i > VIOTAPE_MAX_TAPE)
+ return -ENODEV;
+ if (!node)
return -ENODEV;
+ if (i >= viotape_numdev)
+ viotape_numdev = i + 1;
+
tape_device[i] = &vdev->dev;
+ viotape_unitinfo[i].rsrcname = of_get_property(node,
+ "linux,vio_rsrcname", NULL);
+ viotape_unitinfo[i].type = of_get_property(node, "linux,vio_type",
+ NULL);
+ viotape_unitinfo[i].model = of_get_property(node, "linux,vio_model",
+ NULL);
state[i].cur_part = 0;
for (j = 0; j < MAX_PARTITIONS; ++j)
@@ -1044,11 +964,6 @@
goto unreg_chrdev;
}
- if ((ret = get_viotape_info()) < 0) {
- printk(VIOTAPE_KERN_WARN "Unable to obtain virtual device information");
- goto unreg_class;
- }
-
ret = vio_register_driver(&viotape_driver);
if (ret)
goto unreg_class;
@@ -1102,9 +1017,6 @@
vio_unregister_driver(&viotape_driver);
class_destroy(tape_class);
unregister_chrdev(VIOTAPE_MAJOR, "viotape");
- if (viotape_unitinfo)
- iseries_hv_free(sizeof(viotape_unitinfo[0]) * VIOTAPE_MAX_TAPE,
- viotape_unitinfo, viotape_unitinfo_token);
viopath_close(viopath_hostLp, viomajorsubtype_tape, VIOTAPE_MAXREQ + 2);
vio_clearHandler(viomajorsubtype_tape);
clear_op_struct_pool();