1 files changed, 20 insertions, 380 deletions

diff --git a/arch/s390/hypfs/hypfs_diag.c b/arch/s390/hypfs/hypfs_diag.c
index 889d83c77826..ea4c436f86a0 100644
--- a/arch/s390/hypfs/hypfs_diag.c
+++ b/arch/s390/hypfs/hypfs_diag.c
@@ -18,13 +18,11 @@
 #include <linux/mm.h>
 #include <asm/diag.h>
 #include <asm/ebcdic.h>
+#include "hypfs_diag.h"
 #include "hypfs.h"
 
-#define TMP_SIZE 64		/* size of temporary buffers */
-
 #define DBFS_D204_HDR_VERSION	0
 
-static char *diag224_cpu_names;			/* diag 224 name table */
 static enum diag204_sc diag204_store_sc;	/* used subcode for store */
 static enum diag204_format diag204_info_type;	/* used diag 204 data format */
 
@@ -33,172 +31,14 @@ static int diag204_buf_pages;		/* number of pages for diag204 data */
 
 static struct dentry *dbfs_d204_file;
 
-/*
- * DIAG 204 member access functions.
- *
- * Since we have two different diag 204 data formats for old and new s390
- * machines, we do not access the structs directly, but use getter functions for
- * each struct member instead. This should make the code more readable.
- */
-
-/* Time information block */
-
-static inline int info_blk_hdr__size(enum diag204_format type)
-{
-	if (type == DIAG204_INFO_SIMPLE)
-		return sizeof(struct diag204_info_blk_hdr);
-	else /* DIAG204_INFO_EXT */
-		return sizeof(struct diag204_x_info_blk_hdr);
-}
-
-static inline __u8 info_blk_hdr__npar(enum diag204_format type, void *hdr)
-{
-	if (type == DIAG204_INFO_SIMPLE)
-		return ((struct diag204_info_blk_hdr *)hdr)->npar;
-	else /* DIAG204_INFO_EXT */
-		return ((struct diag204_x_info_blk_hdr *)hdr)->npar;
-}
-
-static inline __u8 info_blk_hdr__flags(enum diag204_format type, void *hdr)
-{
-	if (type == DIAG204_INFO_SIMPLE)
-		return ((struct diag204_info_blk_hdr *)hdr)->flags;
-	else /* DIAG204_INFO_EXT */
-		return ((struct diag204_x_info_blk_hdr *)hdr)->flags;
-}
-
-/* Partition header */
-
-static inline int part_hdr__size(enum diag204_format type)
+enum diag204_format diag204_get_info_type(void)
 {
-	if (type == DIAG204_INFO_SIMPLE)
-		return sizeof(struct diag204_part_hdr);
-	else /* DIAG204_INFO_EXT */
-		return sizeof(struct diag204_x_part_hdr);
+	return diag204_info_type;
 }
 
-static inline __u8 part_hdr__rcpus(enum diag204_format type, void *hdr)
+static void diag204_set_info_type(enum diag204_format type)
 {
-	if (type == DIAG204_INFO_SIMPLE)
-		return ((struct diag204_part_hdr *)hdr)->cpus;
-	else /* DIAG204_INFO_EXT */
-		return ((struct diag204_x_part_hdr *)hdr)->rcpus;
-}
-
-static inline void part_hdr__part_name(enum diag204_format type, void *hdr,
-				       char *name)
-{
-	if (type == DIAG204_INFO_SIMPLE)
-		memcpy(name, ((struct diag204_part_hdr *)hdr)->part_name,
-		       DIAG204_LPAR_NAME_LEN);
-	else /* DIAG204_INFO_EXT */
-		memcpy(name, ((struct diag204_x_part_hdr *)hdr)->part_name,
-		       DIAG204_LPAR_NAME_LEN);
-	EBCASC(name, DIAG204_LPAR_NAME_LEN);
-	name[DIAG204_LPAR_NAME_LEN] = 0;
-	strim(name);
-}
-
-/* CPU info block */
-
-static inline int cpu_info__size(enum diag204_format type)
-{
-	if (type == DIAG204_INFO_SIMPLE)
-		return sizeof(struct diag204_cpu_info);
-	else /* DIAG204_INFO_EXT */
-		return sizeof(struct diag204_x_cpu_info);
-}
-
-static inline __u8 cpu_info__ctidx(enum diag204_format type, void *hdr)
-{
-	if (type == DIAG204_INFO_SIMPLE)
-		return ((struct diag204_cpu_info *)hdr)->ctidx;
-	else /* DIAG204_INFO_EXT */
-		return ((struct diag204_x_cpu_info *)hdr)->ctidx;
-}
-
-static inline __u16 cpu_info__cpu_addr(enum diag204_format type, void *hdr)
-{
-	if (type == DIAG204_INFO_SIMPLE)
-		return ((struct diag204_cpu_info *)hdr)->cpu_addr;
-	else /* DIAG204_INFO_EXT */
-		return ((struct diag204_x_cpu_info *)hdr)->cpu_addr;
-}
-
-static inline __u64 cpu_info__acc_time(enum diag204_format type, void *hdr)
-{
-	if (type == DIAG204_INFO_SIMPLE)
-		return ((struct diag204_cpu_info *)hdr)->acc_time;
-	else /* DIAG204_INFO_EXT */
-		return ((struct diag204_x_cpu_info *)hdr)->acc_time;
-}
-
-static inline __u64 cpu_info__lp_time(enum diag204_format type, void *hdr)
-{
-	if (type == DIAG204_INFO_SIMPLE)
-		return ((struct diag204_cpu_info *)hdr)->lp_time;
-	else /* DIAG204_INFO_EXT */
-		return ((struct diag204_x_cpu_info *)hdr)->lp_time;
-}
-
-static inline __u64 cpu_info__online_time(enum diag204_format type, void *hdr)
-{
-	if (type == DIAG204_INFO_SIMPLE)
-		return 0;	/* online_time not available in simple info */
-	else /* DIAG204_INFO_EXT */
-		return ((struct diag204_x_cpu_info *)hdr)->online_time;
-}
-
-/* Physical header */
-
-static inline int phys_hdr__size(enum diag204_format type)
-{
-	if (type == DIAG204_INFO_SIMPLE)
-		return sizeof(struct diag204_phys_hdr);
-	else /* DIAG204_INFO_EXT */
-		return sizeof(struct diag204_x_phys_hdr);
-}
-
-static inline __u8 phys_hdr__cpus(enum diag204_format type, void *hdr)
-{
-	if (type == DIAG204_INFO_SIMPLE)
-		return ((struct diag204_phys_hdr *)hdr)->cpus;
-	else /* DIAG204_INFO_EXT */
-		return ((struct diag204_x_phys_hdr *)hdr)->cpus;
-}
-
-/* Physical CPU info block */
-
-static inline int phys_cpu__size(enum diag204_format type)
-{
-	if (type == DIAG204_INFO_SIMPLE)
-		return sizeof(struct diag204_phys_cpu);
-	else /* DIAG204_INFO_EXT */
-		return sizeof(struct diag204_x_phys_cpu);
-}
-
-static inline __u16 phys_cpu__cpu_addr(enum diag204_format type, void *hdr)
-{
-	if (type == DIAG204_INFO_SIMPLE)
-		return ((struct diag204_phys_cpu *)hdr)->cpu_addr;
-	else /* DIAG204_INFO_EXT */
-		return ((struct diag204_x_phys_cpu *)hdr)->cpu_addr;
-}
-
-static inline __u64 phys_cpu__mgm_time(enum diag204_format type, void *hdr)
-{
-	if (type == DIAG204_INFO_SIMPLE)
-		return ((struct diag204_phys_cpu *)hdr)->mgm_time;
-	else /* DIAG204_INFO_EXT */
-		return ((struct diag204_x_phys_cpu *)hdr)->mgm_time;
-}
-
-static inline __u64 phys_cpu__ctidx(enum diag204_format type, void *hdr)
-{
-	if (type == DIAG204_INFO_SIMPLE)
-		return ((struct diag204_phys_cpu *)hdr)->ctidx;
-	else /* DIAG204_INFO_EXT */
-		return ((struct diag204_x_phys_cpu *)hdr)->ctidx;
+	diag204_info_type = type;
 }
 
 /* Diagnose 204 functions */
@@ -215,7 +55,7 @@ static void diag204_free_buffer(void)
 	diag204_buf = NULL;
 }
 
-static void *diag204_get_buffer(enum diag204_format fmt, int *pages)
+void *diag204_get_buffer(enum diag204_format fmt, int *pages)
 {
 	if (diag204_buf) {
 		*pages = diag204_buf_pages;
@@ -262,13 +102,13 @@ static int diag204_probe(void)
 		if (diag204((unsigned long)DIAG204_SUBC_STIB7 |
 			    (unsigned long)DIAG204_INFO_EXT, pages, buf) >= 0) {
 			diag204_store_sc = DIAG204_SUBC_STIB7;
-			diag204_info_type = DIAG204_INFO_EXT;
+			diag204_set_info_type(DIAG204_INFO_EXT);
 			goto out;
 		}
 		if (diag204((unsigned long)DIAG204_SUBC_STIB6 |
 			    (unsigned long)DIAG204_INFO_EXT, pages, buf) >= 0) {
 			diag204_store_sc = DIAG204_SUBC_STIB6;
-			diag204_info_type = DIAG204_INFO_EXT;
+			diag204_set_info_type(DIAG204_INFO_EXT);
 			goto out;
 		}
 		diag204_free_buffer();
@@ -284,7 +124,7 @@ static int diag204_probe(void)
 	if (diag204((unsigned long)DIAG204_SUBC_STIB4 |
 		    (unsigned long)DIAG204_INFO_SIMPLE, pages, buf) >= 0) {
 		diag204_store_sc = DIAG204_SUBC_STIB4;
-		diag204_info_type = DIAG204_INFO_SIMPLE;
+		diag204_set_info_type(DIAG204_INFO_SIMPLE);
 		goto out;
 	} else {
 		rc = -ENOSYS;
@@ -298,60 +138,15 @@ fail_alloc:
 	return rc;
 }
 
-static int diag204_do_store(void *buf, int pages)
+int diag204_store(void *buf, int pages)
 {
 	int rc;
 
-	rc = diag204((unsigned long) diag204_store_sc |
-		     (unsigned long) diag204_info_type, pages, buf);
+	rc = diag204((unsigned long)diag204_store_sc |
+		     (unsigned long)diag204_get_info_type(), pages, buf);
 	return rc < 0 ? -ENOSYS : 0;
 }
 
-static void *diag204_store(void)
-{
-	void *buf;
-	int pages, rc;
-
-	buf = diag204_get_buffer(diag204_info_type, &pages);
-	if (IS_ERR(buf))
-		goto out;
-	rc = diag204_do_store(buf, pages);
-	if (rc)
-		return ERR_PTR(rc);
-out:
-	return buf;
-}
-
-/* Diagnose 224 functions */
-
-static int diag224_get_name_table(void)
-{
-	/* memory must be below 2GB */
-	diag224_cpu_names = (char *) __get_free_page(GFP_KERNEL | GFP_DMA);
-	if (!diag224_cpu_names)
-		return -ENOMEM;
-	if (diag224(diag224_cpu_names)) {
-		free_page((unsigned long) diag224_cpu_names);
-		return -EOPNOTSUPP;
-	}
-	EBCASC(diag224_cpu_names + 16, (*diag224_cpu_names + 1) * 16);
-	return 0;
-}
-
-static void diag224_delete_name_table(void)
-{
-	free_page((unsigned long) diag224_cpu_names);
-}
-
-static int diag224_idx2name(int index, char *name)
-{
-	memcpy(name, diag224_cpu_names + ((index + 1) * DIAG204_CPU_NAME_LEN),
-	       DIAG204_CPU_NAME_LEN);
-	name[DIAG204_CPU_NAME_LEN] = 0;
-	strim(name);
-	return 0;
-}
-
 struct dbfs_d204_hdr {
 	u64	len;		/* Length of d204 buffer without header */
 	u16	version;	/* Version of header */
@@ -375,7 +170,7 @@ static int dbfs_d204_create(void **data, void **data_free_ptr, size_t *size)
 	if (!base)
 		return -ENOMEM;
 	d204 = PTR_ALIGN(base + sizeof(d204->hdr), PAGE_SIZE) - sizeof(d204->hdr);
-	rc = diag204_do_store(d204->buf, diag204_buf_pages);
+	rc = diag204_store(d204->buf, diag204_buf_pages);
 	if (rc) {
 		vfree(base);
 		return rc;
@@ -404,176 +199,21 @@ __init int hypfs_diag_init(void)
 		return -ENODATA;
 	}
 
-	if (diag204_info_type == DIAG204_INFO_EXT)
+	if (diag204_get_info_type() == DIAG204_INFO_EXT)
 		hypfs_dbfs_create_file(&dbfs_file_d204);
 
-	if (MACHINE_IS_LPAR) {
-		rc = diag224_get_name_table();
-		if (rc) {
-			pr_err("The hardware system does not provide all "
-			       "functions required by hypfs\n");
-			debugfs_remove(dbfs_d204_file);
-			return rc;
-		}
+	rc = hypfs_diag_fs_init();
+	if (rc) {
+		pr_err("The hardware system does not provide all functions required by hypfs\n");
+		debugfs_remove(dbfs_d204_file);
 	}
-	return 0;
+	return rc;
 }
 
 void hypfs_diag_exit(void)
 {
 	debugfs_remove(dbfs_d204_file);
-	diag224_delete_name_table();
+	hypfs_diag_fs_exit();
 	diag204_free_buffer();
 	hypfs_dbfs_remove_file(&dbfs_file_d204);
 }
-
-/*
- * Functions to create the directory structure
- * *******************************************
- */
-
-static int hypfs_create_cpu_files(struct dentry *cpus_dir, void *cpu_info)
-{
-	struct dentry *cpu_dir;
-	char buffer[TMP_SIZE];
-	void *rc;
-
-	snprintf(buffer, TMP_SIZE, "%d", cpu_info__cpu_addr(diag204_info_type,
-							    cpu_info));
-	cpu_dir = hypfs_mkdir(cpus_dir, buffer);
-	rc = hypfs_create_u64(cpu_dir, "mgmtime",
-			      cpu_info__acc_time(diag204_info_type, cpu_info) -
-			      cpu_info__lp_time(diag204_info_type, cpu_info));
-	if (IS_ERR(rc))
-		return PTR_ERR(rc);
-	rc = hypfs_create_u64(cpu_dir, "cputime",
-			      cpu_info__lp_time(diag204_info_type, cpu_info));
-	if (IS_ERR(rc))
-		return PTR_ERR(rc);
-	if (diag204_info_type == DIAG204_INFO_EXT) {
-		rc = hypfs_create_u64(cpu_dir, "onlinetime",
-				      cpu_info__online_time(diag204_info_type,
-							    cpu_info));
-		if (IS_ERR(rc))
-			return PTR_ERR(rc);
-	}
-	diag224_idx2name(cpu_info__ctidx(diag204_info_type, cpu_info), buffer);
-	rc = hypfs_create_str(cpu_dir, "type", buffer);
-	return PTR_ERR_OR_ZERO(rc);
-}
-
-static void *hypfs_create_lpar_files(struct dentry *systems_dir, void *part_hdr)
-{
-	struct dentry *cpus_dir;
-	struct dentry *lpar_dir;
-	char lpar_name[DIAG204_LPAR_NAME_LEN + 1];
-	void *cpu_info;
-	int i;
-
-	part_hdr__part_name(diag204_info_type, part_hdr, lpar_name);
-	lpar_name[DIAG204_LPAR_NAME_LEN] = 0;
-	lpar_dir = hypfs_mkdir(systems_dir, lpar_name);
-	if (IS_ERR(lpar_dir))
-		return lpar_dir;
-	cpus_dir = hypfs_mkdir(lpar_dir, "cpus");
-	if (IS_ERR(cpus_dir))
-		return cpus_dir;
-	cpu_info = part_hdr + part_hdr__size(diag204_info_type);
-	for (i = 0; i < part_hdr__rcpus(diag204_info_type, part_hdr); i++) {
-		int rc;
-		rc = hypfs_create_cpu_files(cpus_dir, cpu_info);
-		if (rc)
-			return ERR_PTR(rc);
-		cpu_info += cpu_info__size(diag204_info_type);
-	}
-	return cpu_info;
-}
-
-static int hypfs_create_phys_cpu_files(struct dentry *cpus_dir, void *cpu_info)
-{
-	struct dentry *cpu_dir;
-	char buffer[TMP_SIZE];
-	void *rc;
-
-	snprintf(buffer, TMP_SIZE, "%i", phys_cpu__cpu_addr(diag204_info_type,
-							    cpu_info));
-	cpu_dir = hypfs_mkdir(cpus_dir, buffer);
-	if (IS_ERR(cpu_dir))
-		return PTR_ERR(cpu_dir);
-	rc = hypfs_create_u64(cpu_dir, "mgmtime",
-			      phys_cpu__mgm_time(diag204_info_type, cpu_info));
-	if (IS_ERR(rc))
-		return PTR_ERR(rc);
-	diag224_idx2name(phys_cpu__ctidx(diag204_info_type, cpu_info), buffer);
-	rc = hypfs_create_str(cpu_dir, "type", buffer);
-	return PTR_ERR_OR_ZERO(rc);
-}
-
-static void *hypfs_create_phys_files(struct dentry *parent_dir, void *phys_hdr)
-{
-	int i;
-	void *cpu_info;
-	struct dentry *cpus_dir;
-
-	cpus_dir = hypfs_mkdir(parent_dir, "cpus");
-	if (IS_ERR(cpus_dir))
-		return cpus_dir;
-	cpu_info = phys_hdr + phys_hdr__size(diag204_info_type);
-	for (i = 0; i < phys_hdr__cpus(diag204_info_type, phys_hdr); i++) {
-		int rc;
-		rc = hypfs_create_phys_cpu_files(cpus_dir, cpu_info);
-		if (rc)
-			return ERR_PTR(rc);
-		cpu_info += phys_cpu__size(diag204_info_type);
-	}
-	return cpu_info;
-}
-
-int hypfs_diag_create_files(struct dentry *root)
-{
-	struct dentry *systems_dir, *hyp_dir;
-	void *time_hdr, *part_hdr;
-	int i, rc;
-	void *buffer, *ptr;
-
-	buffer = diag204_store();
-	if (IS_ERR(buffer))
-		return PTR_ERR(buffer);
-
-	systems_dir = hypfs_mkdir(root, "systems");
-	if (IS_ERR(systems_dir)) {
-		rc = PTR_ERR(systems_dir);
-		goto err_out;
-	}
-	time_hdr = (struct x_info_blk_hdr *)buffer;
-	part_hdr = time_hdr + info_blk_hdr__size(diag204_info_type);
-	for (i = 0; i < info_blk_hdr__npar(diag204_info_type, time_hdr); i++) {
-		part_hdr = hypfs_create_lpar_files(systems_dir, part_hdr);
-		if (IS_ERR(part_hdr)) {
-			rc = PTR_ERR(part_hdr);
-			goto err_out;
-		}
-	}
-	if (info_blk_hdr__flags(diag204_info_type, time_hdr) &
-	    DIAG204_LPAR_PHYS_FLG) {
-		ptr = hypfs_create_phys_files(root, part_hdr);
-		if (IS_ERR(ptr)) {
-			rc = PTR_ERR(ptr);
-			goto err_out;
-		}
-	}
-	hyp_dir = hypfs_mkdir(root, "hyp");
-	if (IS_ERR(hyp_dir)) {
-		rc = PTR_ERR(hyp_dir);
-		goto err_out;
-	}
-	ptr = hypfs_create_str(hyp_dir, "type", "LPAR Hypervisor");
-	if (IS_ERR(ptr)) {
-		rc = PTR_ERR(ptr);
-		goto err_out;
-	}
-	rc = 0;
-
-err_out:
-	return rc;
-}