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[POWERPC] iSeries: Move viodasd probing
This way we only have entries in the device tree for disks that actually exist. A slight complication is that disks may be attached to LPARs at runtime. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Stephen Rothwell
Paul Mackerras
parent
7465ce0db3
commit
8251b4c481
@ -72,7 +72,6 @@ static char __initdata device_type_cpu[] = "cpu";
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static char __initdata device_type_memory[] = "memory";
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static char __initdata device_type_serial[] = "serial";
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static char __initdata device_type_network[] = "network";
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static char __initdata device_type_block[] = "block";
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static char __initdata device_type_pci[] = "pci";
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static char __initdata device_type_vdevice[] = "vdevice";
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static char __initdata device_type_vscsi[] = "vscsi";
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@ -374,11 +373,6 @@ static void __init dt_vdevices(struct iseries_flat_dt *dt)
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dt_end_node(dt);
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}
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reg += HVMAXARCHITECTEDVIRTUALLANS;
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for (i = 0; i < HVMAXARCHITECTEDVIRTUALDISKS; i++)
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dt_do_vdevice(dt, "viodasd", reg, i, device_type_block,
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"IBM,iSeries-viodasd", 1);
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dt_end_node(dt);
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}
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@ -25,8 +25,10 @@
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#include <linux/gfp.h>
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#include <linux/completion.h>
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#include <linux/proc_fs.h>
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#include <linux/module.h>
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#include <asm/firmware.h>
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#include <asm/vio.h>
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#include <asm/iseries/vio.h>
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#include <asm/iseries/iommu.h>
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#include <asm/iseries/hv_types.h>
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@ -57,7 +59,7 @@ struct vio_resource {
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char model[3];
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};
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static struct property * __init new_property(const char *name, int length,
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static struct property *new_property(const char *name, int length,
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const void *value)
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{
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struct property *np = kzalloc(sizeof(*np) + strlen(name) + 1 + length,
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@ -78,7 +80,7 @@ static void __init free_property(struct property *np)
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kfree(np);
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}
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static struct device_node * __init new_node(const char *path,
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static struct device_node *new_node(const char *path,
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struct device_node *parent)
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{
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struct device_node *np = kzalloc(sizeof(*np), GFP_KERNEL);
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@ -97,7 +99,7 @@ static struct device_node * __init new_node(const char *path,
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return np;
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}
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static void __init free_node(struct device_node *np)
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static void free_node(struct device_node *np)
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{
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struct property *next;
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struct property *prop;
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@ -113,7 +115,7 @@ static void __init free_node(struct device_node *np)
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kfree(np);
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}
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static int __init add_string_property(struct device_node *np, const char *name,
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static int add_string_property(struct device_node *np, const char *name,
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const char *value)
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{
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struct property *nprop = new_property(name, strlen(value) + 1, value);
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@ -124,7 +126,7 @@ static int __init add_string_property(struct device_node *np, const char *name,
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return 1;
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}
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static int __init add_raw_property(struct device_node *np, const char *name,
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static int add_raw_property(struct device_node *np, const char *name,
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int length, const void *value)
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{
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struct property *nprop = new_property(name, length, value);
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@ -135,6 +137,201 @@ static int __init add_raw_property(struct device_node *np, const char *name,
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return 1;
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}
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static struct device_node *do_device_node(struct device_node *parent,
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const char *name, u32 reg, u32 unit, const char *type,
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const char *compat, struct vio_resource *res)
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{
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struct device_node *np;
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char path[32];
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snprintf(path, sizeof(path), "/vdevice/%s@%08x", name, reg);
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np = new_node(path, parent);
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if (!np)
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return NULL;
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if (!add_string_property(np, "name", name) ||
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!add_string_property(np, "device_type", type) ||
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!add_string_property(np, "compatible", compat) ||
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!add_raw_property(np, "reg", sizeof(reg), ®) ||
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!add_raw_property(np, "linux,unit_address",
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sizeof(unit), &unit)) {
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goto node_free;
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}
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if (res) {
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if (!add_raw_property(np, "linux,vio_rsrcname",
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sizeof(res->rsrcname), res->rsrcname) ||
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!add_raw_property(np, "linux,vio_type",
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sizeof(res->type), res->type) ||
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!add_raw_property(np, "linux,vio_model",
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sizeof(res->model), res->model))
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goto node_free;
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}
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np->name = of_get_property(np, "name", NULL);
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np->type = of_get_property(np, "device_type", NULL);
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of_attach_node(np);
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#ifdef CONFIG_PROC_DEVICETREE
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if (parent->pde) {
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struct proc_dir_entry *ent;
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ent = proc_mkdir(strrchr(np->full_name, '/') + 1, parent->pde);
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if (ent)
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proc_device_tree_add_node(np, ent);
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}
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#endif
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return np;
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node_free:
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free_node(np);
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return NULL;
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}
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/*
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* This is here so that we can dynamically add viodasd
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* devices without exposing all the above infrastructure.
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*/
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struct vio_dev *vio_create_viodasd(u32 unit)
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{
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struct device_node *vio_root;
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struct device_node *np;
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struct vio_dev *vdev = NULL;
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vio_root = of_find_node_by_path("/vdevice");
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if (!vio_root)
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return NULL;
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np = do_device_node(vio_root, "viodasd", FIRST_VIODASD + unit, unit,
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"block", "IBM,iSeries-viodasd", NULL);
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of_node_put(vio_root);
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if (np) {
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vdev = vio_register_device_node(np);
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if (!vdev)
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free_node(np);
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}
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return vdev;
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}
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EXPORT_SYMBOL_GPL(vio_create_viodasd);
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static void __init handle_block_event(struct HvLpEvent *event)
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{
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struct vioblocklpevent *bevent = (struct vioblocklpevent *)event;
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struct vio_waitevent *pwe;
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if (event == NULL)
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/* Notification that a partition went away! */
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return;
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/* First, we should NEVER get an int here...only acks */
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if (hvlpevent_is_int(event)) {
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printk(KERN_WARNING "handle_viod_request: "
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"Yikes! got an int in viodasd event handler!\n");
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if (hvlpevent_need_ack(event)) {
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event->xRc = HvLpEvent_Rc_InvalidSubtype;
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HvCallEvent_ackLpEvent(event);
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}
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return;
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}
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switch (event->xSubtype & VIOMINOR_SUBTYPE_MASK) {
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case vioblockopen:
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/*
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* Handle a response to an open request. We get all the
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* disk information in the response, so update it. The
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* correlation token contains a pointer to a waitevent
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* structure that has a completion in it. update the
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* return code in the waitevent structure and post the
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* completion to wake up the guy who sent the request
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*/
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pwe = (struct vio_waitevent *)event->xCorrelationToken;
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pwe->rc = event->xRc;
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pwe->sub_result = bevent->sub_result;
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complete(&pwe->com);
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break;
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case vioblockclose:
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break;
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default:
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printk(KERN_WARNING "handle_viod_request: unexpected subtype!");
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if (hvlpevent_need_ack(event)) {
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event->xRc = HvLpEvent_Rc_InvalidSubtype;
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HvCallEvent_ackLpEvent(event);
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}
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}
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}
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static void __init probe_disk(struct device_node *vio_root, u32 unit)
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{
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HvLpEvent_Rc hvrc;
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struct vio_waitevent we;
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u16 flags = 0;
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retry:
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init_completion(&we.com);
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/* Send the open event to OS/400 */
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hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp,
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HvLpEvent_Type_VirtualIo,
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viomajorsubtype_blockio | vioblockopen,
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HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck,
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viopath_sourceinst(viopath_hostLp),
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viopath_targetinst(viopath_hostLp),
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(u64)(unsigned long)&we, VIOVERSION << 16,
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((u64)unit << 48) | ((u64)flags<< 32),
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0, 0, 0);
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if (hvrc != 0) {
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printk(KERN_WARNING "probe_disk: bad rc on HV open %d\n",
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(int)hvrc);
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return;
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}
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wait_for_completion(&we.com);
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if (we.rc != 0) {
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if (flags != 0)
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return;
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/* try again with read only flag set */
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flags = vioblockflags_ro;
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goto retry;
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}
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/* Send the close event to OS/400. We DON'T expect a response */
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hvrc = HvCallEvent_signalLpEventFast(viopath_hostLp,
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HvLpEvent_Type_VirtualIo,
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viomajorsubtype_blockio | vioblockclose,
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HvLpEvent_AckInd_NoAck, HvLpEvent_AckType_ImmediateAck,
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viopath_sourceinst(viopath_hostLp),
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viopath_targetinst(viopath_hostLp),
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0, VIOVERSION << 16,
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((u64)unit << 48) | ((u64)flags << 32),
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0, 0, 0);
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if (hvrc != 0) {
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printk(KERN_WARNING "probe_disk: "
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"bad rc sending event to OS/400 %d\n", (int)hvrc);
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return;
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}
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do_device_node(vio_root, "viodasd", FIRST_VIODASD + unit, unit,
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"block", "IBM,iSeries-viodasd", NULL);
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}
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static void __init get_viodasd_info(struct device_node *vio_root)
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{
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int rc;
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u32 unit;
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rc = viopath_open(viopath_hostLp, viomajorsubtype_blockio, 2);
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if (rc) {
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printk(KERN_WARNING "get_viodasd_info: "
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"error opening path to host partition %d\n",
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viopath_hostLp);
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return;
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}
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/* Initialize our request handler */
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vio_setHandler(viomajorsubtype_blockio, handle_block_event);
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for (unit = 0; unit < HVMAXARCHITECTEDVIRTUALDISKS; unit++)
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probe_disk(vio_root, unit);
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vio_clearHandler(viomajorsubtype_blockio);
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viopath_close(viopath_hostLp, viomajorsubtype_blockio, 2);
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}
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static void __init handle_cd_event(struct HvLpEvent *event)
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{
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struct viocdlpevent *bevent;
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@ -233,49 +430,9 @@ static void __init get_viocd_info(struct device_node *vio_root)
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for (unit = 0; (unit < HVMAXARCHITECTEDVIRTUALCDROMS) &&
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unitinfo[unit].rsrcname[0]; unit++) {
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struct device_node *np;
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char name[64];
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u32 reg = FIRST_VIOCD + unit;
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snprintf(name, sizeof(name), "/vdevice/viocd@%08x", reg);
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np = new_node(name, vio_root);
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if (!np)
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goto hv_free;
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if (!add_string_property(np, "name", "viocd") ||
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!add_string_property(np, "device_type", "block") ||
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!add_string_property(np, "compatible",
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"IBM,iSeries-viocd") ||
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!add_raw_property(np, "reg", sizeof(reg), ®) ||
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!add_raw_property(np, "linux,unit_address",
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sizeof(unit), &unit) ||
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!add_raw_property(np, "linux,vio_rsrcname",
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sizeof(unitinfo[unit].rsrcname),
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unitinfo[unit].rsrcname) ||
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!add_raw_property(np, "linux,vio_type",
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sizeof(unitinfo[unit].type),
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unitinfo[unit].type) ||
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!add_raw_property(np, "linux,vio_model",
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sizeof(unitinfo[unit].model),
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unitinfo[unit].model))
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goto node_free;
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np->name = of_get_property(np, "name", NULL);
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np->type = of_get_property(np, "device_type", NULL);
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of_attach_node(np);
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#ifdef CONFIG_PROC_DEVICETREE
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if (vio_root->pde) {
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struct proc_dir_entry *ent;
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ent = proc_mkdir(strrchr(np->full_name, '/') + 1,
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vio_root->pde);
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if (ent)
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proc_device_tree_add_node(np, ent);
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}
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#endif
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continue;
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node_free:
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free_node(np);
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break;
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if (!do_device_node(vio_root, "viocd", FIRST_VIOCD + unit, unit,
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"block", "IBM,iSeries-viocd", &unitinfo[unit]))
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break;
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}
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hv_free:
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@ -350,49 +507,10 @@ static void __init get_viotape_info(struct device_node *vio_root)
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for (unit = 0; (unit < HVMAXARCHITECTEDVIRTUALTAPES) &&
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unitinfo[unit].rsrcname[0]; unit++) {
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struct device_node *np;
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char name[64];
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u32 reg = FIRST_VIOTAPE + unit;
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snprintf(name, sizeof(name), "/vdevice/viotape@%08x", reg);
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np = new_node(name, vio_root);
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if (!np)
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goto hv_free;
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if (!add_string_property(np, "name", "viotape") ||
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!add_string_property(np, "device_type", "byte") ||
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!add_string_property(np, "compatible",
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"IBM,iSeries-viotape") ||
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!add_raw_property(np, "reg", sizeof(reg), ®) ||
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!add_raw_property(np, "linux,unit_address",
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sizeof(unit), &unit) ||
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!add_raw_property(np, "linux,vio_rsrcname",
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sizeof(unitinfo[unit].rsrcname),
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unitinfo[unit].rsrcname) ||
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!add_raw_property(np, "linux,vio_type",
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sizeof(unitinfo[unit].type),
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unitinfo[unit].type) ||
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!add_raw_property(np, "linux,vio_model",
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sizeof(unitinfo[unit].model),
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unitinfo[unit].model))
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goto node_free;
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np->name = of_get_property(np, "name", NULL);
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np->type = of_get_property(np, "device_type", NULL);
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of_attach_node(np);
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#ifdef CONFIG_PROC_DEVICETREE
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if (vio_root->pde) {
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struct proc_dir_entry *ent;
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ent = proc_mkdir(strrchr(np->full_name, '/') + 1,
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vio_root->pde);
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if (ent)
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proc_device_tree_add_node(np, ent);
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}
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#endif
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continue;
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node_free:
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free_node(np);
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break;
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if (!do_device_node(vio_root, "viotape", FIRST_VIOTAPE + unit,
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unit, "byte", "IBM,iSeries-viotape",
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&unitinfo[unit]))
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break;
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}
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hv_free:
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@ -422,6 +540,7 @@ static int __init iseries_vio_init(void)
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goto put_node;
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}
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get_viodasd_info(vio_root);
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get_viocd_info(vio_root);
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get_viotape_info(vio_root);
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@ -74,53 +74,9 @@ enum {
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static DEFINE_SPINLOCK(viodasd_spinlock);
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#define VIOMAXREQ 16
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#define VIOMAXBLOCKDMA 12
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#define DEVICE_NO(cell) ((struct viodasd_device *)(cell) - &viodasd_devices[0])
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|
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struct open_data {
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u64 disk_size;
|
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u16 max_disk;
|
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u16 cylinders;
|
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u16 tracks;
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u16 sectors;
|
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u16 bytes_per_sector;
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};
|
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|
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struct rw_data {
|
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u64 offset;
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struct {
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u32 token;
|
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u32 reserved;
|
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u64 len;
|
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} dma_info[VIOMAXBLOCKDMA];
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};
|
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|
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struct vioblocklpevent {
|
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struct HvLpEvent event;
|
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u32 reserved;
|
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u16 version;
|
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u16 sub_result;
|
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u16 disk;
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u16 flags;
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union {
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struct open_data open_data;
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struct rw_data rw_data;
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u64 changed;
|
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} u;
|
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};
|
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|
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#define vioblockflags_ro 0x0001
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|
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enum vioblocksubtype {
|
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vioblockopen = 0x0001,
|
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vioblockclose = 0x0002,
|
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vioblockread = 0x0003,
|
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vioblockwrite = 0x0004,
|
||||
vioblockflush = 0x0005,
|
||||
vioblockcheck = 0x0007
|
||||
};
|
||||
|
||||
struct viodasd_waitevent {
|
||||
struct completion com;
|
||||
int rc;
|
||||
@ -429,7 +385,7 @@ static void do_viodasd_request(struct request_queue *q)
|
||||
* Probe a single disk and fill in the viodasd_device structure
|
||||
* for it.
|
||||
*/
|
||||
static void probe_disk(struct viodasd_device *d)
|
||||
static int probe_disk(struct viodasd_device *d)
|
||||
{
|
||||
HvLpEvent_Rc hvrc;
|
||||
struct viodasd_waitevent we;
|
||||
@ -453,14 +409,14 @@ retry:
|
||||
0, 0, 0);
|
||||
if (hvrc != 0) {
|
||||
printk(VIOD_KERN_WARNING "bad rc on HV open %d\n", (int)hvrc);
|
||||
return;
|
||||
return 0;
|
||||
}
|
||||
|
||||
wait_for_completion(&we.com);
|
||||
|
||||
if (we.rc != 0) {
|
||||
if (flags != 0)
|
||||
return;
|
||||
return 0;
|
||||
/* try again with read only flag set */
|
||||
flags = vioblockflags_ro;
|
||||
goto retry;
|
||||
@ -490,15 +446,32 @@ retry:
|
||||
if (hvrc != 0) {
|
||||
printk(VIOD_KERN_WARNING
|
||||
"bad rc sending event to OS/400 %d\n", (int)hvrc);
|
||||
return;
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (d->dev == NULL) {
|
||||
/* this is when we reprobe for new disks */
|
||||
if (vio_create_viodasd(dev_no) == NULL) {
|
||||
printk(VIOD_KERN_WARNING
|
||||
"cannot allocate virtual device for disk %d\n",
|
||||
dev_no);
|
||||
return 0;
|
||||
}
|
||||
/*
|
||||
* The vio_create_viodasd will have recursed into this
|
||||
* routine with d->dev set to the new vio device and
|
||||
* will finish the setup of the disk below.
|
||||
*/
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* create the request queue for the disk */
|
||||
spin_lock_init(&d->q_lock);
|
||||
q = blk_init_queue(do_viodasd_request, &d->q_lock);
|
||||
if (q == NULL) {
|
||||
printk(VIOD_KERN_WARNING "cannot allocate queue for disk %d\n",
|
||||
dev_no);
|
||||
return;
|
||||
return 0;
|
||||
}
|
||||
g = alloc_disk(1 << PARTITION_SHIFT);
|
||||
if (g == NULL) {
|
||||
@ -506,7 +479,7 @@ retry:
|
||||
"cannot allocate disk structure for disk %d\n",
|
||||
dev_no);
|
||||
blk_cleanup_queue(q);
|
||||
return;
|
||||
return 0;
|
||||
}
|
||||
|
||||
d->disk = g;
|
||||
@ -538,6 +511,7 @@ retry:
|
||||
|
||||
/* register us in the global list */
|
||||
add_disk(g);
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* returns the total number of scatterlist elements converted */
|
||||
@ -718,8 +692,7 @@ static int viodasd_probe(struct vio_dev *vdev, const struct vio_device_id *id)
|
||||
struct viodasd_device *d = &viodasd_devices[vdev->unit_address];
|
||||
|
||||
d->dev = &vdev->dev;
|
||||
probe_disk(d);
|
||||
if (d->disk == NULL)
|
||||
if (!probe_disk(d))
|
||||
return -ENODEV;
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -51,6 +51,51 @@
|
||||
*/
|
||||
#define VIO_MAX_SUBTYPES 8
|
||||
|
||||
#define VIOMAXBLOCKDMA 12
|
||||
|
||||
struct open_data {
|
||||
u64 disk_size;
|
||||
u16 max_disk;
|
||||
u16 cylinders;
|
||||
u16 tracks;
|
||||
u16 sectors;
|
||||
u16 bytes_per_sector;
|
||||
};
|
||||
|
||||
struct rw_data {
|
||||
u64 offset;
|
||||
struct {
|
||||
u32 token;
|
||||
u32 reserved;
|
||||
u64 len;
|
||||
} dma_info[VIOMAXBLOCKDMA];
|
||||
};
|
||||
|
||||
struct vioblocklpevent {
|
||||
struct HvLpEvent event;
|
||||
u32 reserved;
|
||||
u16 version;
|
||||
u16 sub_result;
|
||||
u16 disk;
|
||||
u16 flags;
|
||||
union {
|
||||
struct open_data open_data;
|
||||
struct rw_data rw_data;
|
||||
u64 changed;
|
||||
} u;
|
||||
};
|
||||
|
||||
#define vioblockflags_ro 0x0001
|
||||
|
||||
enum vioblocksubtype {
|
||||
vioblockopen = 0x0001,
|
||||
vioblockclose = 0x0002,
|
||||
vioblockread = 0x0003,
|
||||
vioblockwrite = 0x0004,
|
||||
vioblockflush = 0x0005,
|
||||
vioblockcheck = 0x0007
|
||||
};
|
||||
|
||||
struct viocdlpevent {
|
||||
struct HvLpEvent event;
|
||||
u32 reserved;
|
||||
@ -133,6 +178,8 @@ extern void vio_set_hostlp(void);
|
||||
extern void *vio_get_event_buffer(int subtype);
|
||||
extern void vio_free_event_buffer(int subtype, void *buffer);
|
||||
|
||||
extern struct vio_dev *vio_create_viodasd(u32 unit);
|
||||
|
||||
extern HvLpIndex viopath_hostLp;
|
||||
extern HvLpIndex viopath_ourLp;
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user