[S390] move sysinfo.c from drivers/s390 to arch/s390/kernel
All in sysinfo.c is core kernel code and not driver code. So move it
to arch/s390/kernel. Also includes some small cleanups.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/kernel/sysinfo.c b/arch/s390/kernel/sysinfo.c
new file mode 100644
index 0000000..b5e75e1
--- /dev/null
+++ b/arch/s390/kernel/sysinfo.c
@@ -0,0 +1,428 @@
+/*
+ * Copyright IBM Corp. 2001, 2009
+ * Author(s): Ulrich Weigand <Ulrich.Weigand@de.ibm.com>,
+ * Martin Schwidefsky <schwidefsky@de.ibm.com>,
+ */
+
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <asm/ebcdic.h>
+#include <asm/sysinfo.h>
+#include <asm/cpcmd.h>
+
+/* Sigh, math-emu. Don't ask. */
+#include <asm/sfp-util.h>
+#include <math-emu/soft-fp.h>
+#include <math-emu/single.h>
+
+static inline int stsi_0(void)
+{
+ int rc = stsi(NULL, 0, 0, 0);
+ return rc == -ENOSYS ? rc : (((unsigned int) rc) >> 28);
+}
+
+static int stsi_1_1_1(struct sysinfo_1_1_1 *info, char *page, int len)
+{
+ if (stsi(info, 1, 1, 1) == -ENOSYS)
+ return len;
+
+ EBCASC(info->manufacturer, sizeof(info->manufacturer));
+ EBCASC(info->type, sizeof(info->type));
+ EBCASC(info->model, sizeof(info->model));
+ EBCASC(info->sequence, sizeof(info->sequence));
+ EBCASC(info->plant, sizeof(info->plant));
+ EBCASC(info->model_capacity, sizeof(info->model_capacity));
+ EBCASC(info->model_perm_cap, sizeof(info->model_perm_cap));
+ EBCASC(info->model_temp_cap, sizeof(info->model_temp_cap));
+ len += sprintf(page + len, "Manufacturer: %-16.16s\n",
+ info->manufacturer);
+ len += sprintf(page + len, "Type: %-4.4s\n",
+ info->type);
+ if (info->model[0] != '\0')
+ /*
+ * Sigh: the model field has been renamed with System z9
+ * to model_capacity and a new model field has been added
+ * after the plant field. To avoid confusing older programs
+ * the "Model:" prints "model_capacity model" or just
+ * "model_capacity" if the model string is empty .
+ */
+ len += sprintf(page + len,
+ "Model: %-16.16s %-16.16s\n",
+ info->model_capacity, info->model);
+ else
+ len += sprintf(page + len, "Model: %-16.16s\n",
+ info->model_capacity);
+ len += sprintf(page + len, "Sequence Code: %-16.16s\n",
+ info->sequence);
+ len += sprintf(page + len, "Plant: %-4.4s\n",
+ info->plant);
+ len += sprintf(page + len, "Model Capacity: %-16.16s %08u\n",
+ info->model_capacity, *(u32 *) info->model_cap_rating);
+ if (info->model_perm_cap[0] != '\0')
+ len += sprintf(page + len,
+ "Model Perm. Capacity: %-16.16s %08u\n",
+ info->model_perm_cap,
+ *(u32 *) info->model_perm_cap_rating);
+ if (info->model_temp_cap[0] != '\0')
+ len += sprintf(page + len,
+ "Model Temp. Capacity: %-16.16s %08u\n",
+ info->model_temp_cap,
+ *(u32 *) info->model_temp_cap_rating);
+ return len;
+}
+
+static int stsi_1_2_2(struct sysinfo_1_2_2 *info, char *page, int len)
+{
+ struct sysinfo_1_2_2_extension *ext;
+ int i;
+
+ if (stsi(info, 1, 2, 2) == -ENOSYS)
+ return len;
+ ext = (struct sysinfo_1_2_2_extension *)
+ ((unsigned long) info + info->acc_offset);
+
+ len += sprintf(page + len, "\n");
+ len += sprintf(page + len, "CPUs Total: %d\n",
+ info->cpus_total);
+ len += sprintf(page + len, "CPUs Configured: %d\n",
+ info->cpus_configured);
+ len += sprintf(page + len, "CPUs Standby: %d\n",
+ info->cpus_standby);
+ len += sprintf(page + len, "CPUs Reserved: %d\n",
+ info->cpus_reserved);
+
+ if (info->format == 1) {
+ /*
+ * Sigh 2. According to the specification the alternate
+ * capability field is a 32 bit floating point number
+ * if the higher order 8 bits are not zero. Printing
+ * a floating point number in the kernel is a no-no,
+ * always print the number as 32 bit unsigned integer.
+ * The user-space needs to know about the strange
+ * encoding of the alternate cpu capability.
+ */
+ len += sprintf(page + len, "Capability: %u %u\n",
+ info->capability, ext->alt_capability);
+ for (i = 2; i <= info->cpus_total; i++)
+ len += sprintf(page + len,
+ "Adjustment %02d-way: %u %u\n",
+ i, info->adjustment[i-2],
+ ext->alt_adjustment[i-2]);
+
+ } else {
+ len += sprintf(page + len, "Capability: %u\n",
+ info->capability);
+ for (i = 2; i <= info->cpus_total; i++)
+ len += sprintf(page + len,
+ "Adjustment %02d-way: %u\n",
+ i, info->adjustment[i-2]);
+ }
+
+ if (info->secondary_capability != 0)
+ len += sprintf(page + len, "Secondary Capability: %d\n",
+ info->secondary_capability);
+ return len;
+}
+
+static int stsi_2_2_2(struct sysinfo_2_2_2 *info, char *page, int len)
+{
+ if (stsi(info, 2, 2, 2) == -ENOSYS)
+ return len;
+
+ EBCASC(info->name, sizeof(info->name));
+
+ len += sprintf(page + len, "\n");
+ len += sprintf(page + len, "LPAR Number: %d\n",
+ info->lpar_number);
+
+ len += sprintf(page + len, "LPAR Characteristics: ");
+ if (info->characteristics & LPAR_CHAR_DEDICATED)
+ len += sprintf(page + len, "Dedicated ");
+ if (info->characteristics & LPAR_CHAR_SHARED)
+ len += sprintf(page + len, "Shared ");
+ if (info->characteristics & LPAR_CHAR_LIMITED)
+ len += sprintf(page + len, "Limited ");
+ len += sprintf(page + len, "\n");
+
+ len += sprintf(page + len, "LPAR Name: %-8.8s\n",
+ info->name);
+
+ len += sprintf(page + len, "LPAR Adjustment: %d\n",
+ info->caf);
+
+ len += sprintf(page + len, "LPAR CPUs Total: %d\n",
+ info->cpus_total);
+ len += sprintf(page + len, "LPAR CPUs Configured: %d\n",
+ info->cpus_configured);
+ len += sprintf(page + len, "LPAR CPUs Standby: %d\n",
+ info->cpus_standby);
+ len += sprintf(page + len, "LPAR CPUs Reserved: %d\n",
+ info->cpus_reserved);
+ len += sprintf(page + len, "LPAR CPUs Dedicated: %d\n",
+ info->cpus_dedicated);
+ len += sprintf(page + len, "LPAR CPUs Shared: %d\n",
+ info->cpus_shared);
+ return len;
+}
+
+static int stsi_3_2_2(struct sysinfo_3_2_2 *info, char *page, int len)
+{
+ int i;
+
+ if (stsi(info, 3, 2, 2) == -ENOSYS)
+ return len;
+ for (i = 0; i < info->count; i++) {
+ EBCASC(info->vm[i].name, sizeof(info->vm[i].name));
+ EBCASC(info->vm[i].cpi, sizeof(info->vm[i].cpi));
+ len += sprintf(page + len, "\n");
+ len += sprintf(page + len, "VM%02d Name: %-8.8s\n",
+ i, info->vm[i].name);
+ len += sprintf(page + len, "VM%02d Control Program: %-16.16s\n",
+ i, info->vm[i].cpi);
+
+ len += sprintf(page + len, "VM%02d Adjustment: %d\n",
+ i, info->vm[i].caf);
+
+ len += sprintf(page + len, "VM%02d CPUs Total: %d\n",
+ i, info->vm[i].cpus_total);
+ len += sprintf(page + len, "VM%02d CPUs Configured: %d\n",
+ i, info->vm[i].cpus_configured);
+ len += sprintf(page + len, "VM%02d CPUs Standby: %d\n",
+ i, info->vm[i].cpus_standby);
+ len += sprintf(page + len, "VM%02d CPUs Reserved: %d\n",
+ i, info->vm[i].cpus_reserved);
+ }
+ return len;
+}
+
+static int proc_read_sysinfo(char *page, char **start,
+ off_t off, int count,
+ int *eof, void *data)
+{
+ unsigned long info = get_zeroed_page(GFP_KERNEL);
+ int level, len;
+
+ if (!info)
+ return 0;
+
+ len = 0;
+ level = stsi_0();
+ if (level >= 1)
+ len = stsi_1_1_1((struct sysinfo_1_1_1 *) info, page, len);
+
+ if (level >= 1)
+ len = stsi_1_2_2((struct sysinfo_1_2_2 *) info, page, len);
+
+ if (level >= 2)
+ len = stsi_2_2_2((struct sysinfo_2_2_2 *) info, page, len);
+
+ if (level >= 3)
+ len = stsi_3_2_2((struct sysinfo_3_2_2 *) info, page, len);
+
+ free_page(info);
+ return len;
+}
+
+static __init int create_proc_sysinfo(void)
+{
+ create_proc_read_entry("sysinfo", 0444, NULL,
+ proc_read_sysinfo, NULL);
+ return 0;
+}
+device_initcall(create_proc_sysinfo);
+
+/*
+ * Service levels interface.
+ */
+
+static DECLARE_RWSEM(service_level_sem);
+static LIST_HEAD(service_level_list);
+
+int register_service_level(struct service_level *slr)
+{
+ struct service_level *ptr;
+
+ down_write(&service_level_sem);
+ list_for_each_entry(ptr, &service_level_list, list)
+ if (ptr == slr) {
+ up_write(&service_level_sem);
+ return -EEXIST;
+ }
+ list_add_tail(&slr->list, &service_level_list);
+ up_write(&service_level_sem);
+ return 0;
+}
+EXPORT_SYMBOL(register_service_level);
+
+int unregister_service_level(struct service_level *slr)
+{
+ struct service_level *ptr, *next;
+ int rc = -ENOENT;
+
+ down_write(&service_level_sem);
+ list_for_each_entry_safe(ptr, next, &service_level_list, list) {
+ if (ptr != slr)
+ continue;
+ list_del(&ptr->list);
+ rc = 0;
+ break;
+ }
+ up_write(&service_level_sem);
+ return rc;
+}
+EXPORT_SYMBOL(unregister_service_level);
+
+static void *service_level_start(struct seq_file *m, loff_t *pos)
+{
+ down_read(&service_level_sem);
+ return seq_list_start(&service_level_list, *pos);
+}
+
+static void *service_level_next(struct seq_file *m, void *p, loff_t *pos)
+{
+ return seq_list_next(p, &service_level_list, pos);
+}
+
+static void service_level_stop(struct seq_file *m, void *p)
+{
+ up_read(&service_level_sem);
+}
+
+static int service_level_show(struct seq_file *m, void *p)
+{
+ struct service_level *slr;
+
+ slr = list_entry(p, struct service_level, list);
+ slr->seq_print(m, slr);
+ return 0;
+}
+
+static const struct seq_operations service_level_seq_ops = {
+ .start = service_level_start,
+ .next = service_level_next,
+ .stop = service_level_stop,
+ .show = service_level_show
+};
+
+static int service_level_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &service_level_seq_ops);
+}
+
+static const struct file_operations service_level_ops = {
+ .open = service_level_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release
+};
+
+static void service_level_vm_print(struct seq_file *m,
+ struct service_level *slr)
+{
+ char *query_buffer, *str;
+
+ query_buffer = kmalloc(1024, GFP_KERNEL | GFP_DMA);
+ if (!query_buffer)
+ return;
+ cpcmd("QUERY CPLEVEL", query_buffer, 1024, NULL);
+ str = strchr(query_buffer, '\n');
+ if (str)
+ *str = 0;
+ seq_printf(m, "VM: %s\n", query_buffer);
+ kfree(query_buffer);
+}
+
+static struct service_level service_level_vm = {
+ .seq_print = service_level_vm_print
+};
+
+static __init int create_proc_service_level(void)
+{
+ proc_create("service_levels", 0, NULL, &service_level_ops);
+ if (MACHINE_IS_VM)
+ register_service_level(&service_level_vm);
+ return 0;
+}
+subsys_initcall(create_proc_service_level);
+
+/*
+ * Bogomips calculation based on cpu capability.
+ */
+int get_cpu_capability(unsigned int *capability)
+{
+ struct sysinfo_1_2_2 *info;
+ int rc;
+
+ info = (void *) get_zeroed_page(GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+ rc = stsi(info, 1, 2, 2);
+ if (rc == -ENOSYS)
+ goto out;
+ rc = 0;
+ *capability = info->capability;
+out:
+ free_page((unsigned long) info);
+ return rc;
+}
+
+/*
+ * CPU capability might have changed. Therefore recalculate loops_per_jiffy.
+ */
+void s390_adjust_jiffies(void)
+{
+ struct sysinfo_1_2_2 *info;
+ const unsigned int fmil = 0x4b189680; /* 1e7 as 32-bit float. */
+ FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR);
+ FP_DECL_EX;
+ unsigned int capability;
+
+ info = (void *) get_zeroed_page(GFP_KERNEL);
+ if (!info)
+ return;
+
+ if (stsi(info, 1, 2, 2) != -ENOSYS) {
+ /*
+ * Major sigh. The cpu capability encoding is "special".
+ * If the first 9 bits of info->capability are 0 then it
+ * is a 32 bit unsigned integer in the range 0 .. 2^23.
+ * If the first 9 bits are != 0 then it is a 32 bit float.
+ * In addition a lower value indicates a proportionally
+ * higher cpu capacity. Bogomips are the other way round.
+ * To get to a halfway suitable number we divide 1e7
+ * by the cpu capability number. Yes, that means a floating
+ * point division .. math-emu here we come :-)
+ */
+ FP_UNPACK_SP(SA, &fmil);
+ if ((info->capability >> 23) == 0)
+ FP_FROM_INT_S(SB, info->capability, 32, int);
+ else
+ FP_UNPACK_SP(SB, &info->capability);
+ FP_DIV_S(SR, SA, SB);
+ FP_TO_INT_S(capability, SR, 32, 0);
+ } else
+ /*
+ * Really old machine without stsi block for basic
+ * cpu information. Report 42.0 bogomips.
+ */
+ capability = 42;
+ loops_per_jiffy = capability * (500000/HZ);
+ free_page((unsigned long) info);
+}
+
+/*
+ * calibrate the delay loop
+ */
+void __cpuinit calibrate_delay(void)
+{
+ s390_adjust_jiffies();
+ /* Print the good old Bogomips line .. */
+ printk(KERN_DEBUG "Calibrating delay loop (skipped)... "
+ "%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ),
+ (loops_per_jiffy/(5000/HZ)) % 100);
+}