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Commit 31bdc5dc authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6 

* 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6:
  [SPARC64]: Set vio->desc_buf to NULL after freeing.
  [SPARC]: Mark sparc and sparc64 as not having virt_to_bus
  [SPARC64]: Fix reset handling in VNET driver.
  [SPARC64]: Handle reset events in vio_link_state_change().
  [SPARC64]: Handle LDC resets properly in domain-services driver.
  [SPARC64]: Massively simplify VIO device layer and support hot add/remove.
  [SPARC64]: Simplify VNET probing.
  [SPARC64]: Simplify VDC device probing.
  [SPARC64]: Add basic infrastructure for MD add/remove notification.
parents 5cc97bf2 a5f8967e

arch/sparc/Kconfig

+3 −0
Original line number Diff line number Diff line
@@ -21,6 +21,9 @@ config GENERIC_ISA_DMA 
	bool

	default y



config ARCH_NO_VIRT_TO_BUS

	def_bool y



source "init/Kconfig"



menu "General machine setup"

arch/sparc64/Kconfig

+3 −0
Original line number Diff line number Diff line
@@ -62,6 +62,9 @@ config AUDIT_ARCH 
	bool

	default y



config ARCH_NO_VIRT_TO_BUS

	def_bool y



choice

	prompt "Kernel page size"

	default SPARC64_PAGE_SIZE_8KB

arch/sparc64/kernel/ds.c

+19 −0
Original line number Diff line number Diff line
@@ -1013,6 +1013,19 @@ static void ds_up(struct ds_info *dp) 
		dp->hs_state = DS_HS_START;

}



static void ds_reset(struct ds_info *dp)

{

	int i;



	dp->hs_state = 0;



	for (i = 0; i < ARRAY_SIZE(ds_states); i++) {

		struct ds_cap_state *cp = &ds_states[i];



		cp->state = CAP_STATE_UNKNOWN;

	}

}



static void ds_event(void *arg, int event)

{

	struct ds_info *dp = arg;
@@ -1028,6 +1041,12 @@ static void ds_event(void *arg, int event) 
		return;

	}



	if (event == LDC_EVENT_RESET) {

		ds_reset(dp);

		spin_unlock_irqrestore(&ds_lock, flags);

		return;

	}



	if (event != LDC_EVENT_DATA_READY) {

		printk(KERN_WARNING PFX "Unexpected LDC event %d\n", event);

		spin_unlock_irqrestore(&ds_lock, flags);

arch/sparc64/kernel/mdesc.c

+75 −3
Original line number Diff line number Diff line
@@ -137,7 +137,7 @@ static struct mdesc_handle *mdesc_kmalloc(unsigned int mdesc_size) 
		       sizeof(struct mdesc_hdr) +

		       mdesc_size);



	base = kmalloc(handle_size + 15, GFP_KERNEL);

	base = kmalloc(handle_size + 15, GFP_KERNEL | __GFP_NOFAIL);

	if (base) {

		struct mdesc_handle *hp;

		unsigned long addr;
@@ -214,18 +214,83 @@ void mdesc_release(struct mdesc_handle *hp) 
}

EXPORT_SYMBOL(mdesc_release);



static DEFINE_MUTEX(mdesc_mutex);

static struct mdesc_notifier_client *client_list;



void mdesc_register_notifier(struct mdesc_notifier_client *client)

{

	u64 node;



	mutex_lock(&mdesc_mutex);

	client->next = client_list;

	client_list = client;



	mdesc_for_each_node_by_name(cur_mdesc, node, client->node_name)

		client->add(cur_mdesc, node);



	mutex_unlock(&mdesc_mutex);

}



/* Run 'func' on nodes which are in A but not in B.  */

static void invoke_on_missing(const char *name,

			      struct mdesc_handle *a,

			      struct mdesc_handle *b,

			      void (*func)(struct mdesc_handle *, u64))

{

	u64 node;



	mdesc_for_each_node_by_name(a, node, name) {

		const u64 *id = mdesc_get_property(a, node, "id", NULL);

		int found = 0;

		u64 fnode;



		mdesc_for_each_node_by_name(b, fnode, name) {

			const u64 *fid = mdesc_get_property(b, fnode,

							    "id", NULL);



			if (*id == *fid) {

				found = 1;

				break;

			}

		}

		if (!found)

			func(a, node);

	}

}



static void notify_one(struct mdesc_notifier_client *p,

		       struct mdesc_handle *old_hp,

		       struct mdesc_handle *new_hp)

{

	invoke_on_missing(p->node_name, old_hp, new_hp, p->remove);

	invoke_on_missing(p->node_name, new_hp, old_hp, p->add);

}



static void mdesc_notify_clients(struct mdesc_handle *old_hp,

				 struct mdesc_handle *new_hp)

{

	struct mdesc_notifier_client *p = client_list;



	while (p) {

		notify_one(p, old_hp, new_hp);

		p = p->next;

	}

}



void mdesc_update(void)

{

	unsigned long len, real_len, status;

	struct mdesc_handle *hp, *orig_hp;

	unsigned long flags;



	mutex_lock(&mdesc_mutex);



	(void) sun4v_mach_desc(0UL, 0UL, &len);



	hp = mdesc_alloc(len, &kmalloc_mdesc_memops);

	if (!hp) {

		printk(KERN_ERR "MD: mdesc alloc fails\n");

		return;

		goto out;

	}



	status = sun4v_mach_desc(__pa(&hp->mdesc), len, &real_len);
@@ -234,18 +299,25 @@ void mdesc_update(void) 
		       status);

		atomic_dec(&hp->refcnt);

		mdesc_free(hp);

		return;

		goto out;

	}



	spin_lock_irqsave(&mdesc_lock, flags);

	orig_hp = cur_mdesc;

	cur_mdesc = hp;

	spin_unlock_irqrestore(&mdesc_lock, flags);



	mdesc_notify_clients(orig_hp, hp);



	spin_lock_irqsave(&mdesc_lock, flags);

	if (atomic_dec_and_test(&orig_hp->refcnt))

		mdesc_free(orig_hp);

	else

		list_add(&orig_hp->list, &mdesc_zombie_list);

	spin_unlock_irqrestore(&mdesc_lock, flags);



out:

	mutex_unlock(&mdesc_mutex);

}



static struct mdesc_elem *node_block(struct mdesc_hdr *mdesc)

arch/sparc64/kernel/vio.c

+61 −33
Original line number Diff line number Diff line
@@ -201,10 +201,11 @@ static void vio_fill_channel_info(struct mdesc_handle *hp, u64 mp, 
static struct vio_dev *vio_create_one(struct mdesc_handle *hp, u64 mp,

				      struct device *parent)

{

	const char *type, *compat;

	const char *type, *compat, *bus_id_name;

	struct device_node *dp;

	struct vio_dev *vdev;

	int err, tlen, clen;

	const u64 *id;



	type = mdesc_get_property(hp, mp, "device-type", &tlen);

	if (!type) {
@@ -220,6 +221,16 @@ static struct vio_dev *vio_create_one(struct mdesc_handle *hp, u64 mp, 
		return NULL;

	}



	bus_id_name = type;

	if (!strcmp(type, "domain-services-port"))

		bus_id_name = "ds";



	if (strlen(bus_id_name) >= KOBJ_NAME_LEN - 4) {

		printk(KERN_ERR "VIO: bus_id_name [%s] is too long.\n",

		       bus_id_name);

		return NULL;

	}



	compat = mdesc_get_property(hp, mp, "device-type", &clen);

	if (!compat) {

		clen = 0;
@@ -249,7 +260,14 @@ static struct vio_dev *vio_create_one(struct mdesc_handle *hp, u64 mp, 


	vio_fill_channel_info(hp, mp, vdev);



	snprintf(vdev->dev.bus_id, BUS_ID_SIZE, "%lx", mp);

	id = mdesc_get_property(hp, mp, "id", NULL);

	if (!id)

		snprintf(vdev->dev.bus_id, BUS_ID_SIZE, "%s",

			 bus_id_name);

	else

		snprintf(vdev->dev.bus_id, BUS_ID_SIZE, "%s-%lu",

			 bus_id_name, *id);



	vdev->dev.parent = parent;

	vdev->dev.bus = &vio_bus_type;

	vdev->dev.release = vio_dev_release;
@@ -269,6 +287,8 @@ static struct vio_dev *vio_create_one(struct mdesc_handle *hp, u64 mp, 
	}

	vdev->dp = dp;



	printk(KERN_ERR "VIO: Adding device %s\n", vdev->dev.bus_id);



	err = device_register(&vdev->dev);

	if (err) {

		printk(KERN_ERR "VIO: Could not register device %s, err=%d\n",
@@ -283,46 +303,46 @@ static struct vio_dev *vio_create_one(struct mdesc_handle *hp, u64 mp, 
	return vdev;

}



static void walk_tree(struct mdesc_handle *hp, u64 n, struct vio_dev *parent)

static void vio_add(struct mdesc_handle *hp, u64 node)

{

	u64 a;



	mdesc_for_each_arc(a, hp, n, MDESC_ARC_TYPE_FWD) {

		struct vio_dev *vdev;

		u64 target;



		target = mdesc_arc_target(hp, a);

		vdev = vio_create_one(hp, target, &parent->dev);

		if (vdev)

			walk_tree(hp, target, vdev);

	}

	(void) vio_create_one(hp, node, &root_vdev->dev);

}



static void create_devices(struct mdesc_handle *hp, u64 root)

static int vio_md_node_match(struct device *dev, void *arg)

{

	u64 mp;

	struct vio_dev *vdev = to_vio_dev(dev);



	root_vdev = vio_create_one(hp, root, NULL);

	if (!root_vdev) {

		printk(KERN_ERR "VIO: Coult not create root device.\n");

		return;

	if (vdev->mp == (u64) arg)

		return 1;



	return 0;

}



	walk_tree(hp, root, root_vdev);

static void vio_remove(struct mdesc_handle *hp, u64 node)

{

	struct device *dev;



	/* Domain services is odd as it doesn't sit underneath the

	 * channel-devices node, so we plug it in manually.

	 */

	mp = mdesc_node_by_name(hp, MDESC_NODE_NULL, "domain-services");

	if (mp != MDESC_NODE_NULL) {

		struct vio_dev *parent = vio_create_one(hp, mp,

							&root_vdev->dev);

	dev = device_find_child(&root_vdev->dev, (void *) node,

				vio_md_node_match);

	if (dev) {

		printk(KERN_INFO "VIO: Removing device %s\n", dev->bus_id);



		if (parent)

			walk_tree(hp, mp, parent);

		device_unregister(dev);

	}

}



static struct mdesc_notifier_client vio_device_notifier = {

	.add		= vio_add,

	.remove		= vio_remove,

	.node_name	= "virtual-device-port",

};



static struct mdesc_notifier_client vio_ds_notifier = {

	.add		= vio_add,

	.remove		= vio_remove,

	.node_name	= "domain-services-port",

};



const char *channel_devices_node = "channel-devices";

const char *channel_devices_compat = "SUNW,sun4v-channel-devices";

const char *cfg_handle_prop = "cfg-handle";
@@ -381,11 +401,19 @@ static int __init vio_init(void) 


	cdev_cfg_handle = *cfg_handle;



	create_devices(hp, root);

	root_vdev = vio_create_one(hp, root, NULL);

	err = -ENODEV;

	if (!root_vdev) {

		printk(KERN_ERR "VIO: Coult not create root device.\n");

		goto out_release;

	}



	mdesc_register_notifier(&vio_device_notifier);

	mdesc_register_notifier(&vio_ds_notifier);



	mdesc_release(hp);



	return 0;

	return err;



out_release:

	mdesc_release(hp);