// SPDX-License-Identifier: GPL-2.0-only/* 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/sched/clock.h>#include <linux/delay.h>#include <linux/mutex.h>#include <linux/kthread.h>#include <linux/reboot.h>#include <linux/cpu.h> #include <asm/hypervisor.h>#include <asm/ldc.h>#include <asm/vio.h>#include <asm/mdesc.h>#include <asm/head.h>#include <asm/irq.h> #include "kernel.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[] = 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[];}; 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_CPUstatic void dr_cpu_data(struct ds_info *dp, struct ds_cap_state *cp, void *buf, int len);#endifstatic 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-%llu: 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-%llu: 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-%llu: 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_CPUstruct 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;Lines 1–500 of 1272. 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// SPDX-License-Identifier: GPL-2.0-only /* 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/sched/clock.h> #include <linux/delay.h> #include <linux/mutex.h> #include <linux/kthread.h> #include <linux/reboot.h> #include <linux/cpu.h> #include <asm/hypervisor.h> #include <asm/ldc.h> #include <asm/vio.h> #include <asm/mdesc.h> #include <asm/head.h> #include <asm/irq.h> #include "kernel.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[] = 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[]; }; 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-%llu: 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-%llu: 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-%llu: 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;