sparc,sparc64: unify kernel/

o Move all files from sparc64/kernel/ to sparc/kernel
  - rename as appropriate
o Update sparc/Makefile to the changes
o Update sparc/kernel/Makefile to include the sparc64 files

NOTE: This commit changes link order on sparc64!

Link order had to change for either of sparc32 and sparc64.
And assuming sparc64 see more testing than sparc32 change link
order on sparc64 where issues will be caught faster.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1244 insertions, 0 deletions

diff --git a/arch/sparc/kernel/ds.c b/arch/sparc/kernel/ds.c
new file mode 100644
index 000000000000..f52e0534d91d
--- /dev/null
+++ b/arch/sparc/kernel/ds.c
@@ -0,0 +1,1244 @@
+/* ds.c: Domain Services driver for Logical Domains
+ *
+ * Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <linux/delay.h>
+#include <linux/mutex.h>
+#include <linux/kthread.h>
+#include <linux/reboot.h>
+#include <linux/cpu.h>
+
+#include <asm/ldc.h>
+#include <asm/vio.h>
+#include <asm/mdesc.h>
+#include <asm/head.h>
+#include <asm/irq.h>
+
+#define DRV_MODULE_NAME		"ds"
+#define PFX DRV_MODULE_NAME	": "
+#define DRV_MODULE_VERSION	"1.0"
+#define DRV_MODULE_RELDATE	"Jul 11, 2007"
+
+static char version[] __devinitdata =
+	DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
+MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
+MODULE_DESCRIPTION("Sun LDOM domain services driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_MODULE_VERSION);
+
+struct ds_msg_tag {
+	__u32			type;
+#define DS_INIT_REQ		0x00
+#define DS_INIT_ACK		0x01
+#define DS_INIT_NACK		0x02
+#define DS_REG_REQ		0x03
+#define DS_REG_ACK		0x04
+#define DS_REG_NACK		0x05
+#define DS_UNREG_REQ		0x06
+#define DS_UNREG_ACK		0x07
+#define DS_UNREG_NACK		0x08
+#define DS_DATA			0x09
+#define DS_NACK			0x0a
+
+	__u32			len;
+};
+
+/* Result codes */
+#define DS_OK			0x00
+#define DS_REG_VER_NACK		0x01
+#define DS_REG_DUP		0x02
+#define DS_INV_HDL		0x03
+#define DS_TYPE_UNKNOWN		0x04
+
+struct ds_version {
+	__u16			major;
+	__u16			minor;
+};
+
+struct ds_ver_req {
+	struct ds_msg_tag	tag;
+	struct ds_version	ver;
+};
+
+struct ds_ver_ack {
+	struct ds_msg_tag	tag;
+	__u16			minor;
+};
+
+struct ds_ver_nack {
+	struct ds_msg_tag	tag;
+	__u16			major;
+};
+
+struct ds_reg_req {
+	struct ds_msg_tag	tag;
+	__u64			handle;
+	__u16			major;
+	__u16			minor;
+	char			svc_id[0];
+};
+
+struct ds_reg_ack {
+	struct ds_msg_tag	tag;
+	__u64			handle;
+	__u16			minor;
+};
+
+struct ds_reg_nack {
+	struct ds_msg_tag	tag;
+	__u64			handle;
+	__u16			major;
+};
+
+struct ds_unreg_req {
+	struct ds_msg_tag	tag;
+	__u64			handle;
+};
+
+struct ds_unreg_ack {
+	struct ds_msg_tag	tag;
+	__u64			handle;
+};
+
+struct ds_unreg_nack {
+	struct ds_msg_tag	tag;
+	__u64			handle;
+};
+
+struct ds_data {
+	struct ds_msg_tag	tag;
+	__u64			handle;
+};
+
+struct ds_data_nack {
+	struct ds_msg_tag	tag;
+	__u64			handle;
+	__u64			result;
+};
+
+struct ds_info;
+struct ds_cap_state {
+	__u64			handle;
+
+	void			(*data)(struct ds_info *dp,
+					struct ds_cap_state *cp,
+					void *buf, int len);
+
+	const char		*service_id;
+
+	u8			state;
+#define CAP_STATE_UNKNOWN	0x00
+#define CAP_STATE_REG_SENT	0x01
+#define CAP_STATE_REGISTERED	0x02
+};
+
+static void md_update_data(struct ds_info *dp, struct ds_cap_state *cp,
+			   void *buf, int len);
+static void domain_shutdown_data(struct ds_info *dp,
+				 struct ds_cap_state *cp,
+				 void *buf, int len);
+static void domain_panic_data(struct ds_info *dp,
+			      struct ds_cap_state *cp,
+			      void *buf, int len);
+#ifdef CONFIG_HOTPLUG_CPU
+static void dr_cpu_data(struct ds_info *dp,
+			struct ds_cap_state *cp,
+			void *buf, int len);
+#endif
+static void ds_pri_data(struct ds_info *dp,
+			struct ds_cap_state *cp,
+			void *buf, int len);
+static void ds_var_data(struct ds_info *dp,
+			struct ds_cap_state *cp,
+			void *buf, int len);
+
+static struct ds_cap_state ds_states_template[] = {
+	{
+		.service_id	= "md-update",
+		.data		= md_update_data,
+	},
+	{
+		.service_id	= "domain-shutdown",
+		.data		= domain_shutdown_data,
+	},
+	{
+		.service_id	= "domain-panic",
+		.data		= domain_panic_data,
+	},
+#ifdef CONFIG_HOTPLUG_CPU
+	{
+		.service_id	= "dr-cpu",
+		.data		= dr_cpu_data,
+	},
+#endif
+	{
+		.service_id	= "pri",
+		.data		= ds_pri_data,
+	},
+	{
+		.service_id	= "var-config",
+		.data		= ds_var_data,
+	},
+	{
+		.service_id	= "var-config-backup",
+		.data		= ds_var_data,
+	},
+};
+
+static DEFINE_SPINLOCK(ds_lock);
+
+struct ds_info {
+	struct ldc_channel	*lp;
+	u8			hs_state;
+#define DS_HS_START		0x01
+#define DS_HS_DONE		0x02
+
+	u64			id;
+
+	void			*rcv_buf;
+	int			rcv_buf_len;
+
+	struct ds_cap_state	*ds_states;
+	int			num_ds_states;
+
+	struct ds_info		*next;
+};
+
+static struct ds_info *ds_info_list;
+
+static struct ds_cap_state *find_cap(struct ds_info *dp, u64 handle)
+{
+	unsigned int index = handle >> 32;
+
+	if (index >= dp->num_ds_states)
+		return NULL;
+	return &dp->ds_states[index];
+}
+
+static struct ds_cap_state *find_cap_by_string(struct ds_info *dp,
+					       const char *name)
+{
+	int i;
+
+	for (i = 0; i < dp->num_ds_states; i++) {
+		if (strcmp(dp->ds_states[i].service_id, name))
+			continue;
+
+		return &dp->ds_states[i];
+	}
+	return NULL;
+}
+
+static int __ds_send(struct ldc_channel *lp, void *data, int len)
+{
+	int err, limit = 1000;
+
+	err = -EINVAL;
+	while (limit-- > 0) {
+		err = ldc_write(lp, data, len);
+		if (!err || (err != -EAGAIN))
+			break;
+		udelay(1);
+	}
+
+	return err;
+}
+
+static int ds_send(struct ldc_channel *lp, void *data, int len)
+{
+	unsigned long flags;
+	int err;
+
+	spin_lock_irqsave(&ds_lock, flags);
+	err = __ds_send(lp, data, len);
+	spin_unlock_irqrestore(&ds_lock, flags);
+
+	return err;
+}
+
+struct ds_md_update_req {
+	__u64				req_num;
+};
+
+struct ds_md_update_res {
+	__u64				req_num;
+	__u32				result;
+};
+
+static void md_update_data(struct ds_info *dp,
+			   struct ds_cap_state *cp,
+			   void *buf, int len)
+{
+	struct ldc_channel *lp = dp->lp;
+	struct ds_data *dpkt = buf;
+	struct ds_md_update_req *rp;
+	struct {
+		struct ds_data		data;
+		struct ds_md_update_res	res;
+	} pkt;
+
+	rp = (struct ds_md_update_req *) (dpkt + 1);
+
+	printk(KERN_INFO "ds-%lu: Machine description update.\n", dp->id);
+
+	mdesc_update();
+
+	memset(&pkt, 0, sizeof(pkt));
+	pkt.data.tag.type = DS_DATA;
+	pkt.data.tag.len = sizeof(pkt) - sizeof(struct ds_msg_tag);
+	pkt.data.handle = cp->handle;
+	pkt.res.req_num = rp->req_num;
+	pkt.res.result = DS_OK;
+
+	ds_send(lp, &pkt, sizeof(pkt));
+}
+
+struct ds_shutdown_req {
+	__u64				req_num;
+	__u32				ms_delay;
+};
+
+struct ds_shutdown_res {
+	__u64				req_num;
+	__u32				result;
+	char				reason[1];
+};
+
+static void domain_shutdown_data(struct ds_info *dp,
+				 struct ds_cap_state *cp,
+				 void *buf, int len)
+{
+	struct ldc_channel *lp = dp->lp;
+	struct ds_data *dpkt = buf;
+	struct ds_shutdown_req *rp;
+	struct {
+		struct ds_data		data;
+		struct ds_shutdown_res	res;
+	} pkt;
+
+	rp = (struct ds_shutdown_req *) (dpkt + 1);
+
+	printk(KERN_ALERT "ds-%lu: Shutdown request from "
+	       "LDOM manager received.\n", dp->id);
+
+	memset(&pkt, 0, sizeof(pkt));
+	pkt.data.tag.type = DS_DATA;
+	pkt.data.tag.len = sizeof(pkt) - sizeof(struct ds_msg_tag);
+	pkt.data.handle = cp->handle;
+	pkt.res.req_num = rp->req_num;
+	pkt.res.result = DS_OK;
+	pkt.res.reason[0] = 0;
+
+	ds_send(lp, &pkt, sizeof(pkt));
+
+	orderly_poweroff(true);
+}
+
+struct ds_panic_req {
+	__u64				req_num;
+};
+
+struct ds_panic_res {
+	__u64				req_num;
+	__u32				result;
+	char				reason[1];
+};
+
+static void domain_panic_data(struct ds_info *dp,
+			      struct ds_cap_state *cp,
+			      void *buf, int len)
+{
+	struct ldc_channel *lp = dp->lp;
+	struct ds_data *dpkt = buf;
+	struct ds_panic_req *rp;
+	struct {
+		struct ds_data		data;
+		struct ds_panic_res	res;
+	} pkt;
+
+	rp = (struct ds_panic_req *) (dpkt + 1);
+
+	printk(KERN_ALERT "ds-%lu: Panic request from "
+	       "LDOM manager received.\n", dp->id);
+
+	memset(&pkt, 0, sizeof(pkt));
+	pkt.data.tag.type = DS_DATA;
+	pkt.data.tag.len = sizeof(pkt) - sizeof(struct ds_msg_tag);
+	pkt.data.handle = cp->handle;
+	pkt.res.req_num = rp->req_num;
+	pkt.res.result = DS_OK;
+	pkt.res.reason[0] = 0;
+
+	ds_send(lp, &pkt, sizeof(pkt));
+
+	panic("PANIC requested by LDOM manager.");
+}
+
+#ifdef CONFIG_HOTPLUG_CPU
+struct dr_cpu_tag {
+	__u64				req_num;
+	__u32				type;
+#define DR_CPU_CONFIGURE		0x43
+#define DR_CPU_UNCONFIGURE		0x55
+#define DR_CPU_FORCE_UNCONFIGURE	0x46
+#define DR_CPU_STATUS			0x53
+
+/* Responses */
+#define DR_CPU_OK			0x6f
+#define DR_CPU_ERROR			0x65
+
+	__u32				num_records;
+};
+
+struct dr_cpu_resp_entry {
+	__u32				cpu;
+	__u32				result;
+#define DR_CPU_RES_OK			0x00
+#define DR_CPU_RES_FAILURE		0x01
+#define DR_CPU_RES_BLOCKED		0x02
+#define DR_CPU_RES_CPU_NOT_RESPONDING	0x03
+#define DR_CPU_RES_NOT_IN_MD		0x04
+
+	__u32				stat;
+#define DR_CPU_STAT_NOT_PRESENT		0x00
+#define DR_CPU_STAT_UNCONFIGURED	0x01
+#define DR_CPU_STAT_CONFIGURED		0x02
+
+	__u32				str_off;
+};
+
+static void __dr_cpu_send_error(struct ds_info *dp,
+				struct ds_cap_state *cp,
+				struct ds_data *data)
+{
+	struct dr_cpu_tag *tag = (struct dr_cpu_tag *) (data + 1);
+	struct {
+		struct ds_data		data;
+		struct dr_cpu_tag	tag;
+	} pkt;
+	int msg_len;
+
+	memset(&pkt, 0, sizeof(pkt));
+	pkt.data.tag.type = DS_DATA;
+	pkt.data.handle = cp->handle;
+	pkt.tag.req_num = tag->req_num;
+	pkt.tag.type = DR_CPU_ERROR;
+	pkt.tag.num_records = 0;
+
+	msg_len = (sizeof(struct ds_data) +
+		   sizeof(struct dr_cpu_tag));
+
+	pkt.data.tag.len = msg_len - sizeof(struct ds_msg_tag);
+
+	__ds_send(dp->lp, &pkt, msg_len);
+}
+
+static void dr_cpu_send_error(struct ds_info *dp,
+			      struct ds_cap_state *cp,
+			      struct ds_data *data)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&ds_lock, flags);
+	__dr_cpu_send_error(dp, cp, data);
+	spin_unlock_irqrestore(&ds_lock, flags);
+}
+
+#define CPU_SENTINEL	0xffffffff
+
+static void purge_dups(u32 *list, u32 num_ents)
+{
+	unsigned int i;
+
+	for (i = 0; i < num_ents; i++) {
+		u32 cpu = list[i];
+		unsigned int j;
+
+		if (cpu == CPU_SENTINEL)
+			continue;
+
+		for (j = i + 1; j < num_ents; j++) {
+			if (list[j] == cpu)
+				list[j] = CPU_SENTINEL;
+		}
+	}
+}
+
+static int dr_cpu_size_response(int ncpus)
+{
+	return (sizeof(struct ds_data) +
+		sizeof(struct dr_cpu_tag) +
+		(sizeof(struct dr_cpu_resp_entry) * ncpus));
+}
+
+static void dr_cpu_init_response(struct ds_data *resp, u64 req_num,
+				 u64 handle, int resp_len, int ncpus,
+				 cpumask_t *mask, u32 default_stat)
+{
+	struct dr_cpu_resp_entry *ent;
+	struct dr_cpu_tag *tag;
+	int i, cpu;
+
+	tag = (struct dr_cpu_tag *) (resp + 1);
+	ent = (struct dr_cpu_resp_entry *) (tag + 1);
+
+	resp->tag.type = DS_DATA;
+	resp->tag.len = resp_len - sizeof(struct ds_msg_tag);
+	resp->handle = handle;
+	tag->req_num = req_num;
+	tag->type = DR_CPU_OK;
+	tag->num_records = ncpus;
+
+	i = 0;
+	for_each_cpu_mask(cpu, *mask) {
+		ent[i].cpu = cpu;
+		ent[i].result = DR_CPU_RES_OK;
+		ent[i].stat = default_stat;
+		i++;
+	}
+	BUG_ON(i != ncpus);
+}
+
+static void dr_cpu_mark(struct ds_data *resp, int cpu, int ncpus,
+			u32 res, u32 stat)
+{
+	struct dr_cpu_resp_entry *ent;
+	struct dr_cpu_tag *tag;
+	int i;
+
+	tag = (struct dr_cpu_tag *) (resp + 1);
+	ent = (struct dr_cpu_resp_entry *) (tag + 1);
+
+	for (i = 0; i < ncpus; i++) {
+		if (ent[i].cpu != cpu)
+			continue;
+		ent[i].result = res;
+		ent[i].stat = stat;
+		break;
+	}
+}
+
+static int __cpuinit dr_cpu_configure(struct ds_info *dp,
+				      struct ds_cap_state *cp,
+				      u64 req_num,
+				      cpumask_t *mask)
+{
+	struct ds_data *resp;
+	int resp_len, ncpus, cpu;
+	unsigned long flags;
+
+	ncpus = cpus_weight(*mask);
+	resp_len = dr_cpu_size_response(ncpus);
+	resp = kzalloc(resp_len, GFP_KERNEL);
+	if (!resp)
+		return -ENOMEM;
+
+	dr_cpu_init_response(resp, req_num, cp->handle,
+			     resp_len, ncpus, mask,
+			     DR_CPU_STAT_CONFIGURED);
+
+	mdesc_fill_in_cpu_data(*mask);
+
+	for_each_cpu_mask(cpu, *mask) {
+		int err;
+
+		printk(KERN_INFO "ds-%lu: Starting cpu %d...\n",
+		       dp->id, cpu);
+		err = cpu_up(cpu);
+		if (err) {
+			__u32 res = DR_CPU_RES_FAILURE;
+			__u32 stat = DR_CPU_STAT_UNCONFIGURED;
+
+			if (!cpu_present(cpu)) {
+				/* CPU not present in MD */
+				res = DR_CPU_RES_NOT_IN_MD;
+				stat = DR_CPU_STAT_NOT_PRESENT;
+			} else if (err == -ENODEV) {
+				/* CPU did not call in successfully */
+				res = DR_CPU_RES_CPU_NOT_RESPONDING;
+			}
+
+			printk(KERN_INFO "ds-%lu: CPU startup failed err=%d\n",
+			       dp->id, err);
+			dr_cpu_mark(resp, cpu, ncpus, res, stat);
+		}
+	}
+
+	spin_lock_irqsave(&ds_lock, flags);
+	__ds_send(dp->lp, resp, resp_len);
+	spin_unlock_irqrestore(&ds_lock, flags);
+
+	kfree(resp);
+
+	/* Redistribute IRQs, taking into account the new cpus.  */
+	fixup_irqs();
+
+	return 0;
+}
+
+static int dr_cpu_unconfigure(struct ds_info *dp,
+			      struct ds_cap_state *cp,
+			      u64 req_num,
+			      cpumask_t *mask)
+{
+	struct ds_data *resp;
+	int resp_len, ncpus, cpu;
+	unsigned long flags;
+
+	ncpus = cpus_weight(*mask);
+	resp_len = dr_cpu_size_response(ncpus);
+	resp = kzalloc(resp_len, GFP_KERNEL);
+	if (!resp)
+		return -ENOMEM;
+
+	dr_cpu_init_response(resp, req_num, cp->handle,
+			     resp_len, ncpus, mask,
+			     DR_CPU_STAT_UNCONFIGURED);
+
+	for_each_cpu_mask(cpu, *mask) {
+		int err;
+
+		printk(KERN_INFO "ds-%lu: Shutting down cpu %d...\n",
+		       dp->id, cpu);
+		err = cpu_down(cpu);
+		if (err)
+			dr_cpu_mark(resp, cpu, ncpus,
+				    DR_CPU_RES_FAILURE,
+				    DR_CPU_STAT_CONFIGURED);
+	}
+
+	spin_lock_irqsave(&ds_lock, flags);
+	__ds_send(dp->lp, resp, resp_len);
+	spin_unlock_irqrestore(&ds_lock, flags);
+
+	kfree(resp);
+
+	return 0;
+}
+
+static void __cpuinit dr_cpu_data(struct ds_info *dp,
+				  struct ds_cap_state *cp,
+				  void *buf, int len)
+{
+	struct ds_data *data = buf;
+	struct dr_cpu_tag *tag = (struct dr_cpu_tag *) (data + 1);
+	u32 *cpu_list = (u32 *) (tag + 1);
+	u64 req_num = tag->req_num;
+	cpumask_t mask;
+	unsigned int i;
+	int err;
+
+	switch (tag->type) {
+	case DR_CPU_CONFIGURE:
+	case DR_CPU_UNCONFIGURE:
+	case DR_CPU_FORCE_UNCONFIGURE:
+		break;
+
+	default:
+		dr_cpu_send_error(dp, cp, data);
+		return;
+	}
+
+	purge_dups(cpu_list, tag->num_records);
+
+	cpus_clear(mask);
+	for (i = 0; i < tag->num_records; i++) {
+		if (cpu_list[i] == CPU_SENTINEL)
+			continue;
+
+		if (cpu_list[i] < NR_CPUS)
+			cpu_set(cpu_list[i], mask);
+	}
+
+	if (tag->type == DR_CPU_CONFIGURE)
+		err = dr_cpu_configure(dp, cp, req_num, &mask);
+	else
+		err = dr_cpu_unconfigure(dp, cp, req_num, &mask);
+
+	if (err)
+		dr_cpu_send_error(dp, cp, data);
+}
+#endif /* CONFIG_HOTPLUG_CPU */
+
+struct ds_pri_msg {
+	__u64				req_num;
+	__u64				type;
+#define DS_PRI_REQUEST			0x00
+#define DS_PRI_DATA			0x01
+#define DS_PRI_UPDATE			0x02
+};
+
+static void ds_pri_data(struct ds_info *dp,
+			struct ds_cap_state *cp,
+			void *buf, int len)
+{
+	struct ds_data *dpkt = buf;
+	struct ds_pri_msg *rp;
+
+	rp = (struct ds_pri_msg *) (dpkt + 1);
+
+	printk(KERN_INFO "ds-%lu: PRI REQ [%lx:%lx], len=%d\n",
+	       dp->id, rp->req_num, rp->type, len);
+}
+
+struct ds_var_hdr {
+	__u32				type;
+#define DS_VAR_SET_REQ			0x00
+#define DS_VAR_DELETE_REQ		0x01
+#define DS_VAR_SET_RESP			0x02
+#define DS_VAR_DELETE_RESP		0x03
+};
+
+struct ds_var_set_msg {
+	struct ds_var_hdr		hdr;
+	char				name_and_value[0];
+};
+
+struct ds_var_delete_msg {
+	struct ds_var_hdr		hdr;
+	char				name[0];
+};
+
+struct ds_var_resp {
+	struct ds_var_hdr		hdr;
+	__u32				result;
+#define DS_VAR_SUCCESS			0x00
+#define DS_VAR_NO_SPACE			0x01
+#define DS_VAR_INVALID_VAR		0x02
+#define DS_VAR_INVALID_VAL		0x03
+#define DS_VAR_NOT_PRESENT		0x04
+};
+
+static DEFINE_MUTEX(ds_var_mutex);
+static int ds_var_doorbell;
+static int ds_var_response;
+
+static void ds_var_data(struct ds_info *dp,
+			struct ds_cap_state *cp,
+			void *buf, int len)
+{
+	struct ds_data *dpkt = buf;
+	struct ds_var_resp *rp;
+
+	rp = (struct ds_var_resp *) (dpkt + 1);
+
+	if (rp->hdr.type != DS_VAR_SET_RESP &&
+	    rp->hdr.type != DS_VAR_DELETE_RESP)
+		return;
+
+	ds_var_response = rp->result;
+	wmb();
+	ds_var_doorbell = 1;
+}
+
+void ldom_set_var(const char *var, const char *value)
+{
+	struct ds_cap_state *cp;
+	struct ds_info *dp;
+	unsigned long flags;
+
+	spin_lock_irqsave(&ds_lock, flags);
+	cp = NULL;
+	for (dp = ds_info_list; dp; dp = dp->next) {
+		struct ds_cap_state *tmp;
+
+		tmp = find_cap_by_string(dp, "var-config");
+		if (tmp && tmp->state == CAP_STATE_REGISTERED) {
+			cp = tmp;
+			break;
+		}
+	}
+	if (!cp) {
+		for (dp = ds_info_list; dp; dp = dp->next) {
+			struct ds_cap_state *tmp;
+
+			tmp = find_cap_by_string(dp, "var-config-backup");
+			if (tmp && tmp->state == CAP_STATE_REGISTERED) {
+				cp = tmp;
+				break;
+			}
+		}
+	}
+	spin_unlock_irqrestore(&ds_lock, flags);
+
+	if (cp) {
+		union {
+			struct {
+				struct ds_data		data;
+				struct ds_var_set_msg	msg;
+			} header;
+			char			all[512];
+		} pkt;
+		char  *base, *p;
+		int msg_len, loops;
+
+		memset(&pkt, 0, sizeof(pkt));
+		pkt.header.data.tag.type = DS_DATA;
+		pkt.header.data.handle = cp->handle;
+		pkt.header.msg.hdr.type = DS_VAR_SET_REQ;
+		base = p = &pkt.header.msg.name_and_value[0];
+		strcpy(p, var);
+		p += strlen(var) + 1;
+		strcpy(p, value);
+		p += strlen(value) + 1;
+
+		msg_len = (sizeof(struct ds_data) +
+			   sizeof(struct ds_var_set_msg) +
+			   (p - base));
+		msg_len = (msg_len + 3) & ~3;
+		pkt.header.data.tag.len = msg_len - sizeof(struct ds_msg_tag);
+
+		mutex_lock(&ds_var_mutex);
+
+		spin_lock_irqsave(&ds_lock, flags);
+		ds_var_doorbell = 0;
+		ds_var_response = -1;
+
+		__ds_send(dp->lp, &pkt, msg_len);
+		spin_unlock_irqrestore(&ds_lock, flags);
+
+		loops = 1000;
+		while (ds_var_doorbell == 0) {
+			if (loops-- < 0)
+				break;
+			barrier();
+			udelay(100);
+		}
+
+		mutex_unlock(&ds_var_mutex);
+
+		if (ds_var_doorbell == 0 ||
+		    ds_var_response != DS_VAR_SUCCESS)
+			printk(KERN_ERR "ds-%lu: var-config [%s:%s] "
+			       "failed, response(%d).\n",
+			       dp->id, var, value,
+			       ds_var_response);
+	} else {
+		printk(KERN_ERR PFX "var-config not registered so "
+		       "could not set (%s) variable to (%s).\n",
+		       var, value);
+	}
+}
+
+void ldom_reboot(const char *boot_command)
+{
+	/* Don't bother with any of this if the boot_command
+	 * is empty.
+	 */
+	if (boot_command && strlen(boot_command)) {
+		char full_boot_str[256];
+
+		strcpy(full_boot_str, "boot ");
+		strcpy(full_boot_str + strlen("boot "), boot_command);
+
+		ldom_set_var("reboot-command", full_boot_str);
+	}
+	sun4v_mach_sir();
+}
+
+void ldom_power_off(void)
+{
+	sun4v_mach_exit(0);
+}
+
+static void ds_conn_reset(struct ds_info *dp)
+{
+	printk(KERN_ERR "ds-%lu: ds_conn_reset() from %p\n",
+	       dp->id, __builtin_return_address(0));
+}
+
+static int register_services(struct ds_info *dp)
+{
+	struct ldc_channel *lp = dp->lp;
+	int i;
+
+	for (i = 0; i < dp->num_ds_states; i++) {
+		struct {
+			struct ds_reg_req req;
+			u8 id_buf[256];
+		} pbuf;
+		struct ds_cap_state *cp = &dp->ds_states[i];
+		int err, msg_len;
+		u64 new_count;
+
+		if (cp->state == CAP_STATE_REGISTERED)
+			continue;
+
+		new_count = sched_clock() & 0xffffffff;
+		cp->handle = ((u64) i << 32) | new_count;
+
+		msg_len = (sizeof(struct ds_reg_req) +
+			   strlen(cp->service_id));
+
+		memset(&pbuf, 0, sizeof(pbuf));
+		pbuf.req.tag.type = DS_REG_REQ;
+		pbuf.req.tag.len = (msg_len - sizeof(struct ds_msg_tag));
+		pbuf.req.handle = cp->handle;
+		pbuf.req.major = 1;
+		pbuf.req.minor = 0;
+		strcpy(pbuf.req.svc_id, cp->service_id);
+
+		err = __ds_send(lp, &pbuf, msg_len);
+		if (err > 0)
+			cp->state = CAP_STATE_REG_SENT;
+	}
+	return 0;
+}
+
+static int ds_handshake(struct ds_info *dp, struct ds_msg_tag *pkt)
+{
+
+	if (dp->hs_state == DS_HS_START) {
+		if (pkt->type != DS_INIT_ACK)
+			goto conn_reset;
+
+		dp->hs_state = DS_HS_DONE;
+
+		return register_services(dp);
+	}
+
+	if (dp->hs_state != DS_HS_DONE)
+		goto conn_reset;
+
+	if (pkt->type == DS_REG_ACK) {
+		struct ds_reg_ack *ap = (struct ds_reg_ack *) pkt;
+		struct ds_cap_state *cp = find_cap(dp, ap->handle);
+
+		if (!cp) {
+			printk(KERN_ERR "ds-%lu: REG ACK for unknown "
+			       "handle %lx\n", dp->id, ap->handle);
+			return 0;
+		}
+		printk(KERN_INFO "ds-%lu: Registered %s service.\n",
+		       dp->id, cp->service_id);
+		cp->state = CAP_STATE_REGISTERED;
+	} else if (pkt->type == DS_REG_NACK) {
+		struct ds_reg_nack *np = (struct ds_reg_nack *) pkt;
+		struct ds_cap_state *cp = find_cap(dp, np->handle);
+
+		if (!cp) {
+			printk(KERN_ERR "ds-%lu: REG NACK for "
+			       "unknown handle %lx\n",
+			       dp->id, np->handle);
+			return 0;
+		}
+		cp->state = CAP_STATE_UNKNOWN;
+	}
+
+	return 0;
+
+conn_reset:
+	ds_conn_reset(dp);
+	return -ECONNRESET;
+}
+
+static void __send_ds_nack(struct ds_info *dp, u64 handle)
+{
+	struct ds_data_nack nack = {
+		.tag = {
+			.type = DS_NACK,
+			.len = (sizeof(struct ds_data_nack) -
+				sizeof(struct ds_msg_tag)),
+		},
+		.handle = handle,
+		.result = DS_INV_HDL,
+	};
+
+	__ds_send(dp->lp, &nack, sizeof(nack));
+}
+
+static LIST_HEAD(ds_work_list);
+static DECLARE_WAIT_QUEUE_HEAD(ds_wait);
+
+struct ds_queue_entry {
+	struct list_head		list;
+	struct ds_info			*dp;
+	int				req_len;
+	int				__pad;
+	u64				req[0];
+};
+
+static void process_ds_work(void)
+{
+	struct ds_queue_entry *qp, *tmp;
+	unsigned long flags;
+	LIST_HEAD(todo);
+
+	spin_lock_irqsave(&ds_lock, flags);
+	list_splice_init(&ds_work_list, &todo);
+	spin_unlock_irqrestore(&ds_lock, flags);
+
+	list_for_each_entry_safe(qp, tmp, &todo, list) {
+		struct ds_data *dpkt = (struct ds_data *) qp->req;
+		struct ds_info *dp = qp->dp;
+		struct ds_cap_state *cp = find_cap(dp, dpkt->handle);
+		int req_len = qp->req_len;
+
+		if (!cp) {
+			printk(KERN_ERR "ds-%lu: Data for unknown "
+			       "handle %lu\n",
+			       dp->id, dpkt->handle);
+
+			spin_lock_irqsave(&ds_lock, flags);
+			__send_ds_nack(dp, dpkt->handle);
+			spin_unlock_irqrestore(&ds_lock, flags);
+		} else {
+			cp->data(dp, cp, dpkt, req_len);
+		}
+
+		list_del(&qp->list);
+		kfree(qp);
+	}
+}
+
+static int ds_thread(void *__unused)
+{
+	DEFINE_WAIT(wait);
+
+	while (1) {
+		prepare_to_wait(&ds_wait, &wait, TASK_INTERRUPTIBLE);
+		if (list_empty(&ds_work_list))
+			schedule();
+		finish_wait(&ds_wait, &wait);
+
+		if (kthread_should_stop())
+			break;
+
+		process_ds_work();
+	}
+
+	return 0;
+}
+
+static int ds_data(struct ds_info *dp, struct ds_msg_tag *pkt, int len)
+{
+	struct ds_data *dpkt = (struct ds_data *) pkt;
+	struct ds_queue_entry *qp;
+
+	qp = kmalloc(sizeof(struct ds_queue_entry) + len, GFP_ATOMIC);
+	if (!qp) {
+		__send_ds_nack(dp, dpkt->handle);
+	} else {
+		qp->dp = dp;
+		memcpy(&qp->req, pkt, len);
+		list_add_tail(&qp->list, &ds_work_list);
+		wake_up(&ds_wait);
+	}
+	return 0;
+}
+
+static void ds_up(struct ds_info *dp)
+{
+	struct ldc_channel *lp = dp->lp;
+	struct ds_ver_req req;
+	int err;
+
+	req.tag.type = DS_INIT_REQ;
+	req.tag.len = sizeof(req) - sizeof(struct ds_msg_tag);
+	req.ver.major = 1;
+	req.ver.minor = 0;
+
+	err = __ds_send(lp, &req, sizeof(req));
+	if (err > 0)
+		dp->hs_state = DS_HS_START;
+}
+
+static void ds_reset(struct ds_info *dp)
+{
+	int i;
+
+	dp->hs_state = 0;
+
+	for (i = 0; i < dp->num_ds_states; i++) {
+		struct ds_cap_state *cp = &dp->ds_states[i];
+
+		cp->state = CAP_STATE_UNKNOWN;
+	}
+}
+
+static void ds_event(void *arg, int event)
+{
+	struct ds_info *dp = arg;
+	struct ldc_channel *lp = dp->lp;
+	unsigned long flags;
+	int err;
+
+	spin_lock_irqsave(&ds_lock, flags);
+
+	if (event == LDC_EVENT_UP) {
+		ds_up(dp);
+		spin_unlock_irqrestore(&ds_lock, flags);
+		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 "ds-%lu: Unexpected LDC event %d\n",
+		       dp->id, event);
+		spin_unlock_irqrestore(&ds_lock, flags);
+		return;
+	}
+
+	err = 0;
+	while (1) {
+		struct ds_msg_tag *tag;
+
+		err = ldc_read(lp, dp->rcv_buf, sizeof(*tag));
+
+		if (unlikely(err < 0)) {
+			if (err == -ECONNRESET)
+				ds_conn_reset(dp);
+			break;
+		}
+		if (err == 0)
+			break;
+
+		tag = dp->rcv_buf;
+		err = ldc_read(lp, tag + 1, tag->len);
+
+		if (unlikely(err < 0)) {
+			if (err == -ECONNRESET)
+				ds_conn_reset(dp);
+			break;
+		}
+		if (err < tag->len)
+			break;
+
+		if (tag->type < DS_DATA)
+			err = ds_handshake(dp, dp->rcv_buf);
+		else
+			err = ds_data(dp, dp->rcv_buf,
+				      sizeof(*tag) + err);
+		if (err == -ECONNRESET)
+			break;
+	}
+
+	spin_unlock_irqrestore(&ds_lock, flags);
+}
+
+static int __devinit ds_probe(struct vio_dev *vdev,
+			      const struct vio_device_id *id)
+{
+	static int ds_version_printed;
+	struct ldc_channel_config ds_cfg = {
+		.event		= ds_event,
+		.mtu		= 4096,
+		.mode		= LDC_MODE_STREAM,
+	};
+	struct mdesc_handle *hp;
+	struct ldc_channel *lp;
+	struct ds_info *dp;
+	const u64 *val;
+	int err, i;
+
+	if (ds_version_printed++ == 0)
+		printk(KERN_INFO "%s", version);
+
+	dp = kzalloc(sizeof(*dp), GFP_KERNEL);
+	err = -ENOMEM;
+	if (!dp)
+		goto out_err;
+
+	hp = mdesc_grab();
+	val = mdesc_get_property(hp, vdev->mp, "id", NULL);
+	if (val)
+		dp->id = *val;
+	mdesc_release(hp);
+
+	dp->rcv_buf = kzalloc(4096, GFP_KERNEL);
+	if (!dp->rcv_buf)
+		goto out_free_dp;
+
+	dp->rcv_buf_len = 4096;
+
+	dp->ds_states = kzalloc(sizeof(ds_states_template),
+				GFP_KERNEL);
+	if (!dp->ds_states)
+		goto out_free_rcv_buf;
+
+	memcpy(dp->ds_states, ds_states_template,
+	       sizeof(ds_states_template));
+	dp->num_ds_states = ARRAY_SIZE(ds_states_template);
+
+	for (i = 0; i < dp->num_ds_states; i++)
+		dp->ds_states[i].handle = ((u64)i << 32);
+
+	ds_cfg.tx_irq = vdev->tx_irq;
+	ds_cfg.rx_irq = vdev->rx_irq;
+
+	lp = ldc_alloc(vdev->channel_id, &ds_cfg, dp);
+	if (IS_ERR(lp)) {
+		err = PTR_ERR(lp);
+		goto out_free_ds_states;
+	}
+	dp->lp = lp;
+
+	err = ldc_bind(lp, "DS");
+	if (err)
+		goto out_free_ldc;
+
+	spin_lock_irq(&ds_lock);
+	dp->next = ds_info_list;
+	ds_info_list = dp;
+	spin_unlock_irq(&ds_lock);
+
+	return err;
+
+out_free_ldc:
+	ldc_free(dp->lp);
+
+out_free_ds_states:
+	kfree(dp->ds_states);
+
+out_free_rcv_buf:
+	kfree(dp->rcv_buf);
+
+out_free_dp:
+	kfree(dp);
+
+out_err:
+	return err;
+}
+
+static int ds_remove(struct vio_dev *vdev)
+{
+	return 0;
+}
+
+static struct vio_device_id __initdata ds_match[] = {
+	{
+		.type = "domain-services-port",
+	},
+	{},
+};
+
+static struct vio_driver ds_driver = {
+	.id_table	= ds_match,
+	.probe		= ds_probe,
+	.remove		= ds_remove,
+	.driver		= {
+		.name	= "ds",
+		.owner	= THIS_MODULE,
+	}
+};
+
+static int __init ds_init(void)
+{
+	kthread_run(ds_thread, NULL, "kldomd");
+
+	return vio_register_driver(&ds_driver);
+}
+
+subsys_initcall(ds_init);