1270 lines
26 KiB
C
1270 lines
26 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/* ds.c: Domain Services driver for Logical Domains
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*
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* Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net>
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/string.h>
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#include <linux/slab.h>
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#include <linux/sched.h>
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#include <linux/sched/clock.h>
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#include <linux/delay.h>
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#include <linux/mutex.h>
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#include <linux/kthread.h>
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#include <linux/reboot.h>
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#include <linux/cpu.h>
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#include <asm/hypervisor.h>
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#include <asm/ldc.h>
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#include <asm/vio.h>
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#include <asm/mdesc.h>
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#include <asm/head.h>
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#include <asm/irq.h>
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#include "kernel.h"
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#define DRV_MODULE_NAME "ds"
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#define PFX DRV_MODULE_NAME ": "
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#define DRV_MODULE_VERSION "1.0"
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#define DRV_MODULE_RELDATE "Jul 11, 2007"
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static char version[] =
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DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
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MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
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MODULE_DESCRIPTION("Sun LDOM domain services driver");
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MODULE_LICENSE("GPL");
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MODULE_VERSION(DRV_MODULE_VERSION);
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struct ds_msg_tag {
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__u32 type;
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#define DS_INIT_REQ 0x00
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#define DS_INIT_ACK 0x01
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#define DS_INIT_NACK 0x02
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#define DS_REG_REQ 0x03
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#define DS_REG_ACK 0x04
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#define DS_REG_NACK 0x05
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#define DS_UNREG_REQ 0x06
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#define DS_UNREG_ACK 0x07
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#define DS_UNREG_NACK 0x08
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#define DS_DATA 0x09
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#define DS_NACK 0x0a
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__u32 len;
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};
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/* Result codes */
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#define DS_OK 0x00
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#define DS_REG_VER_NACK 0x01
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#define DS_REG_DUP 0x02
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#define DS_INV_HDL 0x03
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#define DS_TYPE_UNKNOWN 0x04
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struct ds_version {
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__u16 major;
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__u16 minor;
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};
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struct ds_ver_req {
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struct ds_msg_tag tag;
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struct ds_version ver;
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};
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struct ds_ver_ack {
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struct ds_msg_tag tag;
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__u16 minor;
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};
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struct ds_ver_nack {
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struct ds_msg_tag tag;
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__u16 major;
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};
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struct ds_reg_req {
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struct ds_msg_tag tag;
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__u64 handle;
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__u16 major;
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__u16 minor;
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char svc_id[];
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};
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struct ds_reg_ack {
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struct ds_msg_tag tag;
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__u64 handle;
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__u16 minor;
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};
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struct ds_reg_nack {
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struct ds_msg_tag tag;
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__u64 handle;
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__u16 major;
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};
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struct ds_unreg_req {
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struct ds_msg_tag tag;
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__u64 handle;
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};
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struct ds_unreg_ack {
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struct ds_msg_tag tag;
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__u64 handle;
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};
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struct ds_unreg_nack {
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struct ds_msg_tag tag;
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__u64 handle;
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};
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struct ds_data {
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struct ds_msg_tag tag;
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__u64 handle;
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};
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struct ds_data_nack {
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struct ds_msg_tag tag;
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__u64 handle;
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__u64 result;
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};
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struct ds_info;
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struct ds_cap_state {
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__u64 handle;
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void (*data)(struct ds_info *dp,
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struct ds_cap_state *cp,
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void *buf, int len);
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const char *service_id;
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u8 state;
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#define CAP_STATE_UNKNOWN 0x00
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#define CAP_STATE_REG_SENT 0x01
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#define CAP_STATE_REGISTERED 0x02
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};
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static void md_update_data(struct ds_info *dp, struct ds_cap_state *cp,
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void *buf, int len);
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static void domain_shutdown_data(struct ds_info *dp,
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struct ds_cap_state *cp,
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void *buf, int len);
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static void domain_panic_data(struct ds_info *dp,
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struct ds_cap_state *cp,
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void *buf, int len);
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#ifdef CONFIG_HOTPLUG_CPU
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static void dr_cpu_data(struct ds_info *dp,
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struct ds_cap_state *cp,
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void *buf, int len);
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#endif
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static void ds_pri_data(struct ds_info *dp,
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struct ds_cap_state *cp,
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void *buf, int len);
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static void ds_var_data(struct ds_info *dp,
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struct ds_cap_state *cp,
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void *buf, int len);
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static struct ds_cap_state ds_states_template[] = {
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{
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.service_id = "md-update",
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.data = md_update_data,
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},
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{
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.service_id = "domain-shutdown",
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.data = domain_shutdown_data,
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},
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{
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.service_id = "domain-panic",
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.data = domain_panic_data,
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},
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#ifdef CONFIG_HOTPLUG_CPU
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{
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.service_id = "dr-cpu",
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.data = dr_cpu_data,
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},
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#endif
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{
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.service_id = "pri",
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.data = ds_pri_data,
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},
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{
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.service_id = "var-config",
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.data = ds_var_data,
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},
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{
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.service_id = "var-config-backup",
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.data = ds_var_data,
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},
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};
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static DEFINE_SPINLOCK(ds_lock);
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struct ds_info {
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struct ldc_channel *lp;
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u8 hs_state;
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#define DS_HS_START 0x01
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#define DS_HS_DONE 0x02
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u64 id;
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void *rcv_buf;
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int rcv_buf_len;
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struct ds_cap_state *ds_states;
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int num_ds_states;
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struct ds_info *next;
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};
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static struct ds_info *ds_info_list;
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static struct ds_cap_state *find_cap(struct ds_info *dp, u64 handle)
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{
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unsigned int index = handle >> 32;
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if (index >= dp->num_ds_states)
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return NULL;
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return &dp->ds_states[index];
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}
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static struct ds_cap_state *find_cap_by_string(struct ds_info *dp,
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const char *name)
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{
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int i;
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for (i = 0; i < dp->num_ds_states; i++) {
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if (strcmp(dp->ds_states[i].service_id, name))
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continue;
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return &dp->ds_states[i];
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}
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return NULL;
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}
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static int __ds_send(struct ldc_channel *lp, void *data, int len)
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{
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int err, limit = 1000;
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err = -EINVAL;
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while (limit-- > 0) {
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err = ldc_write(lp, data, len);
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if (!err || (err != -EAGAIN))
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break;
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udelay(1);
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}
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return err;
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}
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static int ds_send(struct ldc_channel *lp, void *data, int len)
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{
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unsigned long flags;
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int err;
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spin_lock_irqsave(&ds_lock, flags);
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err = __ds_send(lp, data, len);
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spin_unlock_irqrestore(&ds_lock, flags);
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return err;
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}
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struct ds_md_update_req {
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__u64 req_num;
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};
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struct ds_md_update_res {
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__u64 req_num;
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__u32 result;
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};
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static void md_update_data(struct ds_info *dp,
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struct ds_cap_state *cp,
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void *buf, int len)
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{
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struct ldc_channel *lp = dp->lp;
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struct ds_data *dpkt = buf;
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struct ds_md_update_req *rp;
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struct {
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struct ds_data data;
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struct ds_md_update_res res;
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} pkt;
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rp = (struct ds_md_update_req *) (dpkt + 1);
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printk(KERN_INFO "ds-%llu: Machine description update.\n", dp->id);
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mdesc_update();
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memset(&pkt, 0, sizeof(pkt));
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pkt.data.tag.type = DS_DATA;
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pkt.data.tag.len = sizeof(pkt) - sizeof(struct ds_msg_tag);
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pkt.data.handle = cp->handle;
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pkt.res.req_num = rp->req_num;
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pkt.res.result = DS_OK;
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ds_send(lp, &pkt, sizeof(pkt));
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}
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struct ds_shutdown_req {
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__u64 req_num;
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__u32 ms_delay;
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};
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struct ds_shutdown_res {
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__u64 req_num;
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__u32 result;
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char reason[1];
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};
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static void domain_shutdown_data(struct ds_info *dp,
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struct ds_cap_state *cp,
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void *buf, int len)
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{
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struct ldc_channel *lp = dp->lp;
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struct ds_data *dpkt = buf;
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struct ds_shutdown_req *rp;
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struct {
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struct ds_data data;
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struct ds_shutdown_res res;
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} pkt;
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rp = (struct ds_shutdown_req *) (dpkt + 1);
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printk(KERN_ALERT "ds-%llu: Shutdown request from "
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"LDOM manager received.\n", dp->id);
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memset(&pkt, 0, sizeof(pkt));
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pkt.data.tag.type = DS_DATA;
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pkt.data.tag.len = sizeof(pkt) - sizeof(struct ds_msg_tag);
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pkt.data.handle = cp->handle;
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pkt.res.req_num = rp->req_num;
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pkt.res.result = DS_OK;
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pkt.res.reason[0] = 0;
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ds_send(lp, &pkt, sizeof(pkt));
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orderly_poweroff(true);
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}
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struct ds_panic_req {
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__u64 req_num;
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};
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struct ds_panic_res {
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__u64 req_num;
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__u32 result;
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char reason[1];
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};
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static void domain_panic_data(struct ds_info *dp,
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struct ds_cap_state *cp,
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void *buf, int len)
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{
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struct ldc_channel *lp = dp->lp;
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struct ds_data *dpkt = buf;
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struct ds_panic_req *rp;
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struct {
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struct ds_data data;
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struct ds_panic_res res;
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} pkt;
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rp = (struct ds_panic_req *) (dpkt + 1);
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printk(KERN_ALERT "ds-%llu: Panic request from "
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"LDOM manager received.\n", dp->id);
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memset(&pkt, 0, sizeof(pkt));
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pkt.data.tag.type = DS_DATA;
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pkt.data.tag.len = sizeof(pkt) - sizeof(struct ds_msg_tag);
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pkt.data.handle = cp->handle;
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pkt.res.req_num = rp->req_num;
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pkt.res.result = DS_OK;
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pkt.res.reason[0] = 0;
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ds_send(lp, &pkt, sizeof(pkt));
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panic("PANIC requested by LDOM manager.");
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}
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#ifdef CONFIG_HOTPLUG_CPU
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struct dr_cpu_tag {
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__u64 req_num;
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__u32 type;
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#define DR_CPU_CONFIGURE 0x43
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#define DR_CPU_UNCONFIGURE 0x55
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#define DR_CPU_FORCE_UNCONFIGURE 0x46
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#define DR_CPU_STATUS 0x53
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/* Responses */
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#define DR_CPU_OK 0x6f
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#define DR_CPU_ERROR 0x65
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__u32 num_records;
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};
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struct dr_cpu_resp_entry {
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__u32 cpu;
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__u32 result;
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#define DR_CPU_RES_OK 0x00
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#define DR_CPU_RES_FAILURE 0x01
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#define DR_CPU_RES_BLOCKED 0x02
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#define DR_CPU_RES_CPU_NOT_RESPONDING 0x03
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#define DR_CPU_RES_NOT_IN_MD 0x04
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__u32 stat;
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#define DR_CPU_STAT_NOT_PRESENT 0x00
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#define DR_CPU_STAT_UNCONFIGURED 0x01
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#define DR_CPU_STAT_CONFIGURED 0x02
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__u32 str_off;
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};
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static void __dr_cpu_send_error(struct ds_info *dp,
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struct ds_cap_state *cp,
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struct ds_data *data)
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{
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struct dr_cpu_tag *tag = (struct dr_cpu_tag *) (data + 1);
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struct {
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struct ds_data data;
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struct dr_cpu_tag tag;
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} pkt;
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int msg_len;
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memset(&pkt, 0, sizeof(pkt));
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pkt.data.tag.type = DS_DATA;
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pkt.data.handle = cp->handle;
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pkt.tag.req_num = tag->req_num;
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pkt.tag.type = DR_CPU_ERROR;
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pkt.tag.num_records = 0;
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msg_len = (sizeof(struct ds_data) +
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sizeof(struct dr_cpu_tag));
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pkt.data.tag.len = msg_len - sizeof(struct ds_msg_tag);
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__ds_send(dp->lp, &pkt, msg_len);
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}
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static void dr_cpu_send_error(struct ds_info *dp,
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struct ds_cap_state *cp,
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struct ds_data *data)
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{
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unsigned long flags;
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spin_lock_irqsave(&ds_lock, flags);
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__dr_cpu_send_error(dp, cp, data);
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spin_unlock_irqrestore(&ds_lock, flags);
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}
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#define CPU_SENTINEL 0xffffffff
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static void purge_dups(u32 *list, u32 num_ents)
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{
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unsigned int i;
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for (i = 0; i < num_ents; i++) {
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u32 cpu = list[i];
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unsigned int j;
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if (cpu == CPU_SENTINEL)
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continue;
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for (j = i + 1; j < num_ents; j++) {
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if (list[j] == cpu)
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list[j] = CPU_SENTINEL;
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}
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}
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}
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static int dr_cpu_size_response(int ncpus)
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{
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return (sizeof(struct ds_data) +
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sizeof(struct dr_cpu_tag) +
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(sizeof(struct dr_cpu_resp_entry) * ncpus));
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}
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static void dr_cpu_init_response(struct ds_data *resp, u64 req_num,
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u64 handle, int resp_len, int ncpus,
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cpumask_t *mask, u32 default_stat)
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{
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struct dr_cpu_resp_entry *ent;
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struct dr_cpu_tag *tag;
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int i, cpu;
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tag = (struct dr_cpu_tag *) (resp + 1);
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ent = (struct dr_cpu_resp_entry *) (tag + 1);
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resp->tag.type = DS_DATA;
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resp->tag.len = resp_len - sizeof(struct ds_msg_tag);
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resp->handle = handle;
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tag->req_num = req_num;
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tag->type = DR_CPU_OK;
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tag->num_records = ncpus;
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i = 0;
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for_each_cpu(cpu, mask) {
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ent[i].cpu = cpu;
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ent[i].result = DR_CPU_RES_OK;
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ent[i].stat = default_stat;
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i++;
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}
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BUG_ON(i != ncpus);
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}
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static void dr_cpu_mark(struct ds_data *resp, int cpu, int ncpus,
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u32 res, u32 stat)
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{
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struct dr_cpu_resp_entry *ent;
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struct dr_cpu_tag *tag;
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int i;
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tag = (struct dr_cpu_tag *) (resp + 1);
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ent = (struct dr_cpu_resp_entry *) (tag + 1);
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for (i = 0; i < ncpus; i++) {
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if (ent[i].cpu != cpu)
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continue;
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ent[i].result = res;
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ent[i].stat = stat;
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break;
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}
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}
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static int dr_cpu_configure(struct ds_info *dp, struct ds_cap_state *cp,
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u64 req_num, cpumask_t *mask)
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{
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struct ds_data *resp;
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int resp_len, ncpus, cpu;
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unsigned long flags;
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ncpus = cpumask_weight(mask);
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resp_len = dr_cpu_size_response(ncpus);
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resp = kzalloc(resp_len, GFP_KERNEL);
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if (!resp)
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return -ENOMEM;
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dr_cpu_init_response(resp, req_num, cp->handle,
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resp_len, ncpus, mask,
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DR_CPU_STAT_CONFIGURED);
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mdesc_populate_present_mask(mask);
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mdesc_fill_in_cpu_data(mask);
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for_each_cpu(cpu, mask) {
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int err;
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printk(KERN_INFO "ds-%llu: Starting cpu %d...\n",
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dp->id, cpu);
|
|
err = add_cpu(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-%llu: 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 = cpumask_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(cpu, mask) {
|
|
int err;
|
|
|
|
printk(KERN_INFO "ds-%llu: Shutting down cpu %d...\n",
|
|
dp->id, cpu);
|
|
err = remove_cpu(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 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);
|
|
|
|
cpumask_clear(&mask);
|
|
for (i = 0; i < tag->num_records; i++) {
|
|
if (cpu_list[i] == CPU_SENTINEL)
|
|
continue;
|
|
|
|
if (cpu_list[i] < nr_cpu_ids)
|
|
cpumask_set_cpu(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-%llu: PRI REQ [%llx:%llx], 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[];
|
|
};
|
|
|
|
struct ds_var_delete_msg {
|
|
struct ds_var_hdr hdr;
|
|
char name[];
|
|
};
|
|
|
|
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;
|
|
|
|
if (strlen(var) + strlen(value) + 2 >
|
|
sizeof(pkt) - sizeof(pkt.header)) {
|
|
printk(KERN_ERR PFX
|
|
"contents length: %zu, which more than max: %lu,"
|
|
"so could not set (%s) variable to (%s).\n",
|
|
strlen(var) + strlen(value) + 2,
|
|
sizeof(pkt) - sizeof(pkt.header), var, value);
|
|
return;
|
|
}
|
|
|
|
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-%llu: 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);
|
|
}
|
|
}
|
|
|
|
static char full_boot_str[256] __attribute__((aligned(32)));
|
|
static int reboot_data_supported;
|
|
|
|
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)) {
|
|
unsigned long len;
|
|
|
|
snprintf(full_boot_str, sizeof(full_boot_str), "boot %s",
|
|
boot_command);
|
|
len = strlen(full_boot_str);
|
|
|
|
if (reboot_data_supported) {
|
|
unsigned long ra = kimage_addr_to_ra(full_boot_str);
|
|
unsigned long hv_ret;
|
|
|
|
hv_ret = sun4v_reboot_data_set(ra, len);
|
|
if (hv_ret != HV_EOK)
|
|
pr_err("SUN4V: Unable to set reboot data "
|
|
"hv_ret=%lu\n", hv_ret);
|
|
} else {
|
|
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-%llu: ds_conn_reset() from %ps\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.id_buf, 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-%llu: REG ACK for unknown "
|
|
"handle %llx\n", dp->id, ap->handle);
|
|
return 0;
|
|
}
|
|
printk(KERN_INFO "ds-%llu: 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-%llu: REG NACK for "
|
|
"unknown handle %llx\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[];
|
|
};
|
|
|
|
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-%llu: Data for unknown "
|
|
"handle %llu\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-%llu: 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 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 = kmemdup(ds_states_template,
|
|
sizeof(ds_states_template), GFP_KERNEL);
|
|
if (!dp->ds_states)
|
|
goto out_free_rcv_buf;
|
|
|
|
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, "DS");
|
|
if (IS_ERR(lp)) {
|
|
err = PTR_ERR(lp);
|
|
goto out_free_ds_states;
|
|
}
|
|
dp->lp = lp;
|
|
|
|
err = ldc_bind(lp);
|
|
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 const struct vio_device_id ds_match[] = {
|
|
{
|
|
.type = "domain-services-port",
|
|
},
|
|
{},
|
|
};
|
|
|
|
static struct vio_driver ds_driver = {
|
|
.id_table = ds_match,
|
|
.probe = ds_probe,
|
|
.name = "ds",
|
|
};
|
|
|
|
static int __init ds_init(void)
|
|
{
|
|
unsigned long hv_ret, major, minor;
|
|
|
|
if (tlb_type == hypervisor) {
|
|
hv_ret = sun4v_get_version(HV_GRP_REBOOT_DATA, &major, &minor);
|
|
if (hv_ret == HV_EOK) {
|
|
pr_info("SUN4V: Reboot data supported (maj=%lu,min=%lu).\n",
|
|
major, minor);
|
|
reboot_data_supported = 1;
|
|
}
|
|
}
|
|
kthread_run(ds_thread, NULL, "kldomd");
|
|
|
|
return vio_register_driver(&ds_driver);
|
|
}
|
|
|
|
fs_initcall(ds_init);
|