#include <linux/sched.h>
#include <linux/delay.h>
#include <linux/mutex.h>
+#include <linux/kthread.h>
+#include <linux/cpu.h>
#include <asm/ldc.h>
#include <asm/vio.h>
#include <asm/power.h>
#include <asm/mdesc.h>
+#include <asm/head.h>
+#include <asm/irq.h>
#define DRV_MODULE_NAME "ds"
#define PFX DRV_MODULE_NAME ": "
__u64 handle;
void (*data)(struct ldc_channel *lp,
- struct ds_cap_state *dp,
+ struct ds_cap_state *cp,
void *buf, int len);
const char *service_id;
#define CAP_STATE_REGISTERED 0x02
};
-static int ds_send(struct ldc_channel *lp, void *data, int len)
+static void md_update_data(struct ldc_channel *lp, struct ds_cap_state *cp,
+ void *buf, int len);
+static void domain_shutdown_data(struct ldc_channel *lp,
+ struct ds_cap_state *cp,
+ void *buf, int len);
+static void domain_panic_data(struct ldc_channel *lp,
+ struct ds_cap_state *cp,
+ void *buf, int len);
+#ifdef CONFIG_HOTPLUG_CPU
+static void dr_cpu_data(struct ldc_channel *lp,
+ struct ds_cap_state *cp,
+ void *buf, int len);
+#endif
+static void ds_pri_data(struct ldc_channel *lp,
+ struct ds_cap_state *cp,
+ void *buf, int len);
+static void ds_var_data(struct ldc_channel *lp,
+ struct ds_cap_state *cp,
+ void *buf, int len);
+
+struct ds_cap_state ds_states[] = {
+ {
+ .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
+
+ void *rcv_buf;
+ int rcv_buf_len;
+};
+
+static struct ds_info *ds_info;
+
+static struct ds_cap_state *find_cap(u64 handle)
+{
+ unsigned int index = handle >> 32;
+
+ if (index >= ARRAY_SIZE(ds_states))
+ return NULL;
+ return &ds_states[index];
+}
+
+static struct ds_cap_state *find_cap_by_string(const char *name)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(ds_states); i++) {
+ if (strcmp(ds_states[i].service_id, name))
+ continue;
+
+ return &ds_states[i];
+ }
+ return NULL;
+}
+
+static int __ds_send(struct ldc_channel *lp, void *data, int len)
{
int err, limit = 1000;
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;
};
printk(KERN_INFO PFX "Machine description update.\n");
+ 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.res.result = DS_OK;
ds_send(lp, &pkt, sizeof(pkt));
-
- mdesc_update();
}
struct ds_shutdown_req {
panic("PANIC requested by LDOM manager.");
}
-struct ds_cpu_tag {
+#ifdef CONFIG_HOTPLUG_CPU
+struct dr_cpu_tag {
__u64 req_num;
__u32 type;
-#define DS_CPU_CONFIGURE 0x43
-#define DS_CPU_UNCONFIGURE 0x55
-#define DS_CPU_FORCE_UNCONFIGURE 0x46
-#define DS_CPU_STATUS 0x53
+#define DR_CPU_CONFIGURE 0x43
+#define DR_CPU_UNCONFIGURE 0x55
+#define DR_CPU_FORCE_UNCONFIGURE 0x46
+#define DR_CPU_STATUS 0x53
/* Responses */
-#define DS_CPU_OK 0x6f
-#define DS_CPU_ERROR 0x65
+#define DR_CPU_OK 0x6f
+#define DR_CPU_ERROR 0x65
__u32 num_records;
};
-struct ds_cpu_record {
- __u32 cpu_id;
+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_cap_state *cp, struct ds_data *data)
+{
+ struct dr_cpu_tag *tag = (struct dr_cpu_tag *) (data + 1);
+ struct ds_info *dp = ds_info;
+ 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_cap_state *cp, struct ds_data *data)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&ds_lock, flags);
+ __dr_cpu_send_error(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 dr_cpu_configure(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 PFX "Starting cpu %d...\n", 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 PFX "CPU startup failed err=%d\n",
+ err);
+ dr_cpu_mark(resp, cpu, ncpus, res, stat);
+ }
+ }
+
+ spin_lock_irqsave(&ds_lock, flags);
+ __ds_send(ds_info->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_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 PFX "CPU[%d]: Shutting down cpu %d...\n",
+ smp_processor_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(ds_info->lp, resp, resp_len);
+ spin_unlock_irqrestore(&ds_lock, flags);
+
+ kfree(resp);
+
+ return 0;
+}
+
static void dr_cpu_data(struct ldc_channel *lp,
- struct ds_cap_state *dp,
+ struct ds_cap_state *cp,
void *buf, int len)
{
- struct ds_data *dpkt = buf;
- struct ds_cpu_tag *rp;
+ 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;
- rp = (struct ds_cpu_tag *) (dpkt + 1);
+ switch (tag->type) {
+ case DR_CPU_CONFIGURE:
+ case DR_CPU_UNCONFIGURE:
+ case DR_CPU_FORCE_UNCONFIGURE:
+ break;
- printk(KERN_ERR PFX "CPU REQ [%lx:%x], len=%d\n",
- rp->req_num, rp->type, len);
+ default:
+ dr_cpu_send_error(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(cp, req_num, &mask);
+ else
+ err = dr_cpu_unconfigure(cp, req_num, &mask);
+
+ if (err)
+ dr_cpu_send_error(cp, data);
}
+#endif /* CONFIG_HOTPLUG_CPU */
struct ds_pri_msg {
__u64 req_num;
ds_var_doorbell = 1;
}
-struct ds_cap_state ds_states[] = {
- {
- .service_id = "md-update",
- .data = md_update_data,
- },
- {
- .service_id = "domain-shutdown",
- .data = domain_shutdown_data,
- },
- {
- .service_id = "domain-panic",
- .data = domain_panic_data,
- },
- {
- .service_id = "dr-cpu",
- .data = dr_cpu_data,
- },
- {
- .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
-
- void *rcv_buf;
- int rcv_buf_len;
-};
-
-static struct ds_info *ds_info;
-
-static struct ds_cap_state *find_cap(u64 handle)
-{
- unsigned int index = handle >> 32;
-
- if (index >= ARRAY_SIZE(ds_states))
- return NULL;
- return &ds_states[index];
-}
-
-static struct ds_cap_state *find_cap_by_string(const char *name)
-{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(ds_states); i++) {
- if (strcmp(ds_states[i].service_id, name))
- continue;
-
- return &ds_states[i];
- }
- return NULL;
-}
-
void ldom_set_var(const char *var, const char *value)
{
struct ds_info *dp = ds_info;
p += strlen(value) + 1;
msg_len = (sizeof(struct ds_data) +
- sizeof(struct ds_var_set_msg) +
- (p - base));
+ 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);
ds_var_doorbell = 0;
ds_var_response = -1;
- ds_send(dp->lp, &pkt, msg_len);
+ __ds_send(dp->lp, &pkt, msg_len);
spin_unlock_irqrestore(&ds_lock, flags);
loops = 1000;
sun4v_mach_sir();
}
+void ldom_power_off(void)
+{
+ sun4v_mach_exit(0);
+}
+
static void ds_conn_reset(struct ds_info *dp)
{
printk(KERN_ERR PFX "ds_conn_reset() from %p\n",
pbuf.req.minor = 0;
strcpy(pbuf.req.svc_id, cp->service_id);
- err = ds_send(lp, &pbuf, msg_len);
+ err = __ds_send(lp, &pbuf, msg_len);
if (err > 0)
cp->state = CAP_STATE_REG_SENT;
}
np->handle);
return 0;
}
- printk(KERN_ERR PFX "Could not register %s service\n",
+ printk(KERN_INFO PFX "Could not register %s service\n",
cp->service_id);
cp->state = CAP_STATE_UNKNOWN;
}
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;
+ int req_len;
+ int __pad;
+ u64 req[0];
+};
+
+static void process_ds_work(void)
+{
+ struct ds_queue_entry *qp, *tmp;
+ static struct ds_info *dp;
+ unsigned long flags;
+ LIST_HEAD(todo);
+
+ spin_lock_irqsave(&ds_lock, flags);
+ list_splice(&ds_work_list, &todo);
+ INIT_LIST_HEAD(&ds_work_list);
+ spin_unlock_irqrestore(&ds_lock, flags);
+
+ dp = ds_info;
+
+ list_for_each_entry_safe(qp, tmp, &todo, list) {
+ struct ds_data *dpkt = (struct ds_data *) qp->req;
+ struct ds_cap_state *cp = find_cap(dpkt->handle);
+ int req_len = qp->req_len;
+
+ if (!cp) {
+ printk(KERN_ERR PFX "Data for unknown handle %lu\n",
+ dpkt->handle);
+
+ spin_lock_irqsave(&ds_lock, flags);
+ __send_ds_nack(dp, dpkt->handle);
+ spin_unlock_irqrestore(&ds_lock, flags);
+ } else {
+ cp->data(dp->lp, 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_cap_state *cp = find_cap(dpkt->handle);
-
- if (!cp) {
- struct ds_data_nack nack = {
- .tag = {
- .type = DS_NACK,
- .len = (sizeof(struct ds_data_nack) -
- sizeof(struct ds_msg_tag)),
- },
- .handle = dpkt->handle,
- .result = DS_INV_HDL,
- };
-
- printk(KERN_ERR PFX "Data for unknown handle %lu\n",
- dpkt->handle);
- ds_send(dp->lp, &nack, sizeof(nack));
+ struct ds_queue_entry *qp;
+
+ qp = kmalloc(sizeof(struct ds_queue_entry) + len, GFP_ATOMIC);
+ if (!qp) {
+ __send_ds_nack(dp, dpkt->handle);
} else {
- cp->data(dp->lp, cp, dpkt, len);
+ memcpy(&qp->req, pkt, len);
+ list_add_tail(&qp->list, &ds_work_list);
+ wake_up(&ds_wait);
}
return 0;
}
req.ver.major = 1;
req.ver.minor = 0;
- err = ds_send(lp, &req, sizeof(req));
+ err = __ds_send(lp, &req, sizeof(req));
if (err > 0)
dp->hs_state = DS_HS_START;
}
for (i = 0; i < ARRAY_SIZE(ds_states); i++)
ds_states[i].handle = ((u64)i << 32);
+ kthread_run(ds_thread, NULL, "kldomd");
+
return vio_register_driver(&ds_driver);
}
projects / powerpc.git / blobdiff