#include <linux/sched.h>
#include <linux/delay.h>
#include <linux/mutex.h>
-#include <linux/workqueue.h>
+#include <linux/kthread.h>
#include <linux/cpu.h>
#include <asm/ldc.h>
#include <asm/power.h>
#include <asm/mdesc.h>
#include <asm/head.h>
-#include <asm/io.h>
-#include <asm/hvtramp.h>
+#include <asm/irq.h>
#define DRV_MODULE_NAME "ds"
#define PFX DRV_MODULE_NAME ": "
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);
.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,
return NULL;
}
-static int ds_send(struct ldc_channel *lp, void *data, int len)
+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.");
}
+#ifdef CONFIG_HOTPLUG_CPU
struct dr_cpu_tag {
__u64 req_num;
__u32 type;
__u32 str_off;
};
-/* XXX Put this in some common place. XXX */
-static unsigned long kimage_addr_to_ra(void *p)
-{
- unsigned long val = (unsigned long) p;
-
- return kern_base + (val - KERNBASE);
-}
-
-void ldom_startcpu_cpuid(unsigned int cpu, unsigned long thread_reg)
-{
- extern unsigned long sparc64_ttable_tl0;
- extern unsigned long kern_locked_tte_data;
- extern int bigkernel;
- struct hvtramp_descr *hdesc;
- unsigned long trampoline_ra;
- struct trap_per_cpu *tb;
- u64 tte_vaddr, tte_data;
- unsigned long hv_err;
-
- hdesc = kzalloc(sizeof(*hdesc), GFP_KERNEL);
- if (!hdesc) {
- printk(KERN_ERR PFX "ldom_startcpu_cpuid: Cannot allocate "
- "hvtramp_descr.\n");
- return;
- }
-
- hdesc->cpu = cpu;
- hdesc->num_mappings = (bigkernel ? 2 : 1);
-
- tb = &trap_block[cpu];
- tb->hdesc = hdesc;
-
- hdesc->fault_info_va = (unsigned long) &tb->fault_info;
- hdesc->fault_info_pa = kimage_addr_to_ra(&tb->fault_info);
-
- hdesc->thread_reg = thread_reg;
-
- tte_vaddr = (unsigned long) KERNBASE;
- tte_data = kern_locked_tte_data;
-
- hdesc->maps[0].vaddr = tte_vaddr;
- hdesc->maps[0].tte = tte_data;
- if (bigkernel) {
- tte_vaddr += 0x400000;
- tte_data += 0x400000;
- hdesc->maps[1].vaddr = tte_vaddr;
- hdesc->maps[1].tte = tte_data;
- }
-
- trampoline_ra = kimage_addr_to_ra(hv_cpu_startup);
-
- hv_err = sun4v_cpu_start(cpu, trampoline_ra,
- kimage_addr_to_ra(&sparc64_ttable_tl0),
- __pa(hdesc));
-}
-
-/* DR cpu requests get queued onto the work list by the
- * dr_cpu_data() callback. The list is protected by
- * ds_lock, and processed by dr_cpu_process() in order.
- */
-static LIST_HEAD(dr_cpu_work_list);
-
-struct dr_cpu_queue_entry {
- struct list_head list;
- char req[0];
-};
-
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);
pkt.data.tag.len = msg_len - sizeof(struct ds_msg_tag);
- ds_send(dp->lp, &pkt, msg_len);
+ __ds_send(dp->lp, &pkt, msg_len);
}
static void dr_cpu_send_error(struct ds_cap_state *cp, struct ds_data *data)
printk(KERN_INFO PFX "Starting cpu %d...\n", cpu);
err = cpu_up(cpu);
- if (err)
- dr_cpu_mark(resp, cpu, ncpus,
- DR_CPU_RES_FAILURE,
- DR_CPU_STAT_UNCONFIGURED);
+ 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);
+ __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;
}
cpumask_t *mask)
{
struct ds_data *resp;
- int resp_len, ncpus;
+ int resp_len, ncpus, cpu;
+ unsigned long flags;
ncpus = cpus_weight(*mask);
resp_len = dr_cpu_size_response(ncpus);
resp_len, ncpus, mask,
DR_CPU_STAT_UNCONFIGURED);
- kfree(resp);
-
- return -EOPNOTSUPP;
-}
-
-static void dr_cpu_process(struct work_struct *work)
-{
- struct dr_cpu_queue_entry *qp, *tmp;
- struct ds_cap_state *cp;
- unsigned long flags;
- LIST_HEAD(todo);
- cpumask_t mask;
+ for_each_cpu_mask(cpu, *mask) {
+ int err;
- cp = find_cap_by_string("dr-cpu");
+ 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);
- list_splice(&dr_cpu_work_list, &todo);
+ __ds_send(ds_info->lp, resp, resp_len);
spin_unlock_irqrestore(&ds_lock, flags);
- list_for_each_entry_safe(qp, tmp, &todo, list) {
- struct ds_data *data = (struct ds_data *) qp->req;
- struct dr_cpu_tag *tag = (struct dr_cpu_tag *) (data + 1);
- u32 *cpu_list = (u32 *) (tag + 1);
- u64 req_num = tag->req_num;
- 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(cp, data);
- goto next;
- }
-
- 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);
+ kfree(resp);
-next:
- list_del(&qp->list);
- kfree(qp);
- }
+ return 0;
}
-static DECLARE_WORK(dr_cpu_work, dr_cpu_process);
-
static void dr_cpu_data(struct ldc_channel *lp,
- struct ds_cap_state *dp,
+ struct ds_cap_state *cp,
void *buf, int len)
{
- struct dr_cpu_queue_entry *qp;
- struct ds_data *dpkt = buf;
- struct dr_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 dr_cpu_tag *) (dpkt + 1);
+ switch (tag->type) {
+ case DR_CPU_CONFIGURE:
+ case DR_CPU_UNCONFIGURE:
+ case DR_CPU_FORCE_UNCONFIGURE:
+ break;
- qp = kmalloc(sizeof(struct dr_cpu_queue_entry) + len, GFP_ATOMIC);
- if (!qp) {
- struct ds_cap_state *cp;
+ default:
+ dr_cpu_send_error(cp, data);
+ return;
+ }
- cp = find_cap_by_string("dr-cpu");
- __dr_cpu_send_error(cp, dpkt);
- } else {
- memcpy(&qp->req, buf, len);
- list_add_tail(&qp->list, &dr_cpu_work_list);
- schedule_work(&dr_cpu_work);
+ 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 = 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;
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;
}
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