[deliverable/linux.git] / drivers / s390 / char / zcore.c

/*
 * zcore module to export memory content and register sets for creating system
 * dumps on SCSI disks (zfcpdump). The "zcore/mem" debugfs file shows the same
 * dump format as s390 standalone dumps.
 *
 * For more information please refer to Documentation/s390/zfcpdump.txt
 *
 * Copyright IBM Corp. 2003, 2008
 * Author(s): Michael Holzheu
 */

#define KMSG_COMPONENT "zdump"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt

#include <linux/init.h>
#include <linux/slab.h>
#include <linux/miscdevice.h>
#include <linux/debugfs.h>
#include <linux/module.h>
#include <linux/memblock.h>

#include <asm/asm-offsets.h>
#include <asm/ipl.h>
#include <asm/sclp.h>
#include <asm/setup.h>
#include <asm/uaccess.h>
#include <asm/debug.h>
#include <asm/processor.h>
#include <asm/irqflags.h>
#include <asm/checksum.h>
#include <asm/os_info.h>
#include <asm/switch_to.h>
#include "sclp.h"

#define TRACE(x...) debug_sprintf_event(zcore_dbf, 1, x)

#define CHUNK_INFO_SIZE	34 /* 2 16-byte char, each followed by blank */

enum arch_id {
	ARCH_S390	= 0,
	ARCH_S390X	= 1,
};

struct ipib_info {
	unsigned long	ipib;
	u32		checksum;
}  __attribute__((packed));

static struct debug_info *zcore_dbf;
static int hsa_available;
static struct dentry *zcore_dir;
static struct dentry *zcore_memmap_file;
static struct dentry *zcore_reipl_file;
static struct dentry *zcore_hsa_file;
static struct ipl_parameter_block *ipl_block;

static char hsa_buf[PAGE_SIZE] __aligned(PAGE_SIZE);

/*
 * Copy memory from HSA to user memory (not reentrant):
 *
 * @dest:  User buffer where memory should be copied to
 * @src:   Start address within HSA where data should be copied
 * @count: Size of buffer, which should be copied
 */
int memcpy_hsa_user(void __user *dest, unsigned long src, size_t count)
{
	unsigned long offset, bytes;

	if (!hsa_available)
		return -ENODATA;

	while (count) {
		if (sclp_sdias_copy(hsa_buf, src / PAGE_SIZE + 2, 1)) {
			TRACE("sclp_sdias_copy() failed\n");
			return -EIO;
		}
		offset = src % PAGE_SIZE;
		bytes = min(PAGE_SIZE - offset, count);
		if (copy_to_user(dest, hsa_buf + offset, bytes))
			return -EFAULT;
		src += bytes;
		dest += bytes;
		count -= bytes;
	}
	return 0;
}

/*
 * Copy memory from HSA to kernel memory (not reentrant):
 *
 * @dest:  Kernel or user buffer where memory should be copied to
 * @src:   Start address within HSA where data should be copied
 * @count: Size of buffer, which should be copied
 */
int memcpy_hsa_kernel(void *dest, unsigned long src, size_t count)
{
	unsigned long offset, bytes;

	if (!hsa_available)
		return -ENODATA;

	while (count) {
		if (sclp_sdias_copy(hsa_buf, src / PAGE_SIZE + 2, 1)) {
			TRACE("sclp_sdias_copy() failed\n");
			return -EIO;
		}
		offset = src % PAGE_SIZE;
		bytes = min(PAGE_SIZE - offset, count);
		memcpy(dest, hsa_buf + offset, bytes);
		src += bytes;
		dest += bytes;
		count -= bytes;
	}
	return 0;
}

static int __init init_cpu_info(void)
{
	struct save_area *sa;

	/* get info for boot cpu from lowcore, stored in the HSA */
	sa = save_area_boot_cpu();
	if (!sa)
		return -ENOMEM;
	if (memcpy_hsa_kernel(hsa_buf, __LC_FPREGS_SAVE_AREA, 512) < 0) {
		TRACE("could not copy from HSA\n");
		return -EIO;
	}
	save_area_add_regs(sa, hsa_buf); /* vx registers are saved in smp.c */
	return 0;
}

/*
 * Release the HSA
 */
static void release_hsa(void)
{
	diag308(DIAG308_REL_HSA, NULL);
	hsa_available = 0;
}

static ssize_t zcore_memmap_read(struct file *filp, char __user *buf,
				 size_t count, loff_t *ppos)
{
	return simple_read_from_buffer(buf, count, ppos, filp->private_data,
				       memblock.memory.cnt * CHUNK_INFO_SIZE);
}

static int zcore_memmap_open(struct inode *inode, struct file *filp)
{
	struct memblock_region *reg;
	char *buf;
	int i = 0;

	buf = kzalloc(memblock.memory.cnt * CHUNK_INFO_SIZE, GFP_KERNEL);
	if (!buf) {
		return -ENOMEM;
	}
	for_each_memblock(memory, reg) {
		sprintf(buf + (i++ * CHUNK_INFO_SIZE), "%016llx %016llx ",
			(unsigned long long) reg->base,
			(unsigned long long) reg->size);
	}
	filp->private_data = buf;
	return nonseekable_open(inode, filp);
}

static int zcore_memmap_release(struct inode *inode, struct file *filp)
{
	kfree(filp->private_data);
	return 0;
}

static const struct file_operations zcore_memmap_fops = {
	.owner		= THIS_MODULE,
	.read		= zcore_memmap_read,
	.open		= zcore_memmap_open,
	.release	= zcore_memmap_release,
	.llseek		= no_llseek,
};

static ssize_t zcore_reipl_write(struct file *filp, const char __user *buf,
				 size_t count, loff_t *ppos)
{
	if (ipl_block) {
		diag308(DIAG308_SET, ipl_block);
		diag308(DIAG308_IPL, NULL);
	}
	return count;
}

static int zcore_reipl_open(struct inode *inode, struct file *filp)
{
	return nonseekable_open(inode, filp);
}

static int zcore_reipl_release(struct inode *inode, struct file *filp)
{
	return 0;
}

static const struct file_operations zcore_reipl_fops = {
	.owner		= THIS_MODULE,
	.write		= zcore_reipl_write,
	.open		= zcore_reipl_open,
	.release	= zcore_reipl_release,
	.llseek		= no_llseek,
};

static ssize_t zcore_hsa_read(struct file *filp, char __user *buf,
			      size_t count, loff_t *ppos)
{
	static char str[18];

	if (hsa_available)
		snprintf(str, sizeof(str), "%lx\n", sclp.hsa_size);
	else
		snprintf(str, sizeof(str), "0\n");
	return simple_read_from_buffer(buf, count, ppos, str, strlen(str));
}

static ssize_t zcore_hsa_write(struct file *filp, const char __user *buf,
			       size_t count, loff_t *ppos)
{
	char value;

	if (*ppos != 0)
		return -EPIPE;
	if (copy_from_user(&value, buf, 1))
		return -EFAULT;
	if (value != '0')
		return -EINVAL;
	release_hsa();
	return count;
}

static const struct file_operations zcore_hsa_fops = {
	.owner		= THIS_MODULE,
	.write		= zcore_hsa_write,
	.read		= zcore_hsa_read,
	.open		= nonseekable_open,
	.llseek		= no_llseek,
};

static int __init check_sdias(void)
{
	if (!sclp.hsa_size) {
		TRACE("Could not determine HSA size\n");
		return -ENODEV;
	}
	return 0;
}

/*
 * Provide IPL parameter information block from either HSA or memory
 * for future reipl
 */
static int __init zcore_reipl_init(void)
{
	struct ipib_info ipib_info;
	int rc;

	rc = memcpy_hsa_kernel(&ipib_info, __LC_DUMP_REIPL, sizeof(ipib_info));
	if (rc)
		return rc;
	if (ipib_info.ipib == 0)
		return 0;
	ipl_block = (void *) __get_free_page(GFP_KERNEL);
	if (!ipl_block)
		return -ENOMEM;
	if (ipib_info.ipib < sclp.hsa_size)
		rc = memcpy_hsa_kernel(ipl_block, ipib_info.ipib, PAGE_SIZE);
	else
		rc = memcpy_real(ipl_block, (void *) ipib_info.ipib, PAGE_SIZE);
	if (rc || csum_partial(ipl_block, ipl_block->hdr.len, 0) !=
	    ipib_info.checksum) {
		TRACE("Checksum does not match\n");
		free_page((unsigned long) ipl_block);
		ipl_block = NULL;
	}
	return 0;
}

static int __init zcore_init(void)
{
	unsigned char arch;
	int rc;

	if (ipl_info.type != IPL_TYPE_FCP_DUMP)
		return -ENODATA;
	if (OLDMEM_BASE)
		return -ENODATA;

	zcore_dbf = debug_register("zcore", 4, 1, 4 * sizeof(long));
	debug_register_view(zcore_dbf, &debug_sprintf_view);
	debug_set_level(zcore_dbf, 6);

	TRACE("devno:  %x\n", ipl_info.data.fcp.dev_id.devno);
	TRACE("wwpn:   %llx\n", (unsigned long long) ipl_info.data.fcp.wwpn);
	TRACE("lun:    %llx\n", (unsigned long long) ipl_info.data.fcp.lun);

	rc = sclp_sdias_init();
	if (rc)
		goto fail;

	rc = check_sdias();
	if (rc)
		goto fail;
	hsa_available = 1;

	rc = memcpy_hsa_kernel(&arch, __LC_AR_MODE_ID, 1);
	if (rc)
		goto fail;

	if (arch == ARCH_S390) {
		pr_alert("The 64-bit dump tool cannot be used for a "
			 "32-bit system\n");
		rc = -EINVAL;
		goto fail;
	}

	pr_alert("DETECTED 'S390X (64 bit) OS'\n");
	rc = init_cpu_info();
	if (rc)
		goto fail;

	rc = zcore_reipl_init();
	if (rc)
		goto fail;

	zcore_dir = debugfs_create_dir("zcore" , NULL);
	if (!zcore_dir) {
		rc = -ENOMEM;
		goto fail;
	}
	zcore_memmap_file = debugfs_create_file("memmap", S_IRUSR, zcore_dir,
						NULL, &zcore_memmap_fops);
	if (!zcore_memmap_file) {
		rc = -ENOMEM;
		goto fail_dir;
	}
	zcore_reipl_file = debugfs_create_file("reipl", S_IRUSR, zcore_dir,
						NULL, &zcore_reipl_fops);
	if (!zcore_reipl_file) {
		rc = -ENOMEM;
		goto fail_memmap_file;
	}
	zcore_hsa_file = debugfs_create_file("hsa", S_IRUSR|S_IWUSR, zcore_dir,
					     NULL, &zcore_hsa_fops);
	if (!zcore_hsa_file) {
		rc = -ENOMEM;
		goto fail_reipl_file;
	}
	return 0;

fail_reipl_file:
	debugfs_remove(zcore_reipl_file);
fail_memmap_file:
	debugfs_remove(zcore_memmap_file);
fail_dir:
	debugfs_remove(zcore_dir);
fail:
	diag308(DIAG308_REL_HSA, NULL);
	return rc;
}

static void __exit zcore_exit(void)
{
	debug_unregister(zcore_dbf);
	sclp_sdias_exit();
	free_page((unsigned long) ipl_block);
	debugfs_remove(zcore_hsa_file);
	debugfs_remove(zcore_reipl_file);
	debugfs_remove(zcore_memmap_file);
	debugfs_remove(zcore_dir);
	diag308(DIAG308_REL_HSA, NULL);
}

MODULE_AUTHOR("Copyright IBM Corp. 2003,2008");
MODULE_DESCRIPTION("zcore module for zfcpdump support");
MODULE_LICENSE("GPL");

subsys_initcall(zcore_init);
module_exit(zcore_exit);
Commit	Line	Data
411ed322 MH	1	/*
	2	* zcore module to export memory content and register sets for creating system
	3	* dumps on SCSI disks (zfcpdump). The "zcore/mem" debugfs file shows the same
	4	* dump format as s390 standalone dumps.
	5	*
	6	* For more information please refer to Documentation/s390/zfcpdump.txt
	7	*
a53c8fab	8	* Copyright IBM Corp. 2003, 2008
411ed322 MH	9	* Author(s): Michael Holzheu
	10	*/
	11
17159dc6 MH	12	#define KMSG_COMPONENT "zdump"
	13	#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
	14
411ed322	15	#include <linux/init.h>
5a0e3ad6	16	#include <linux/slab.h>
411ed322	17	#include <linux/miscdevice.h>
411ed322	18	#include <linux/debugfs.h>
3948a102	19	#include <linux/module.h>
50be6345 PH	20	#include <linux/memblock.h>
50be6345 PH	21
cbb870c8	22	#include <asm/asm-offsets.h>
411ed322 MH	23	#include <asm/ipl.h>
	24	#include <asm/sclp.h>
	25	#include <asm/setup.h>
411ed322 MH	26	#include <asm/uaccess.h>
	27	#include <asm/debug.h>
	28	#include <asm/processor.h>
	29	#include <asm/irqflags.h>
159d1ff8	30	#include <asm/checksum.h>
bbfed511	31	#include <asm/os_info.h>
a62bc073	32	#include <asm/switch_to.h>
763968e2	33	#include "sclp.h"
411ed322 MH	34
411ed322 MH	35	#define TRACE(x...) debug_sprintf_event(zcore_dbf, 1, x)
411ed322	36
12e0c95e	37	#define CHUNK_INFO_SIZE 34 /* 2 16-byte char, each followed by blank */
411ed322 MH	38
	39	enum arch_id {
	40	ARCH_S390 = 0,
	41	ARCH_S390X = 1,
	42	};
	43
099b7651 FM	44	struct ipib_info {
	45	unsigned long ipib;
	46	u32 checksum;
	47	} __attribute__((packed));
	48
411ed322 MH	49	static struct debug_info *zcore_dbf;
	50	static int hsa_available;
	51	static struct dentry *zcore_dir;
12e0c95e	52	static struct dentry *zcore_memmap_file;
099b7651	53	static struct dentry *zcore_reipl_file;
b4b3d128	54	static struct dentry *zcore_hsa_file;
099b7651	55	static struct ipl_parameter_block *ipl_block;
411ed322	56
019d6bec MS	57	static char hsa_buf[PAGE_SIZE] __aligned(PAGE_SIZE);
019d6bec MS	58
411ed322	59	/*
019d6bec	60	* Copy memory from HSA to user memory (not reentrant):
411ed322	61	*
019d6bec	62	* @dest: User buffer where memory should be copied to
411ed322 MH	63	* @src: Start address within HSA where data should be copied
411ed322 MH	64	* @count: Size of buffer, which should be copied
411ed322	65	*/
019d6bec	66	int memcpy_hsa_user(void __user *dest, unsigned long src, size_t count)
411ed322	67	{
019d6bec	68	unsigned long offset, bytes;
411ed322	69
b4b3d128 MH	70	if (!hsa_available)
b4b3d128 MH	71	return -ENODATA;
411ed322	72
019d6bec MS	73	while (count) {
019d6bec MS	74	if (sclp_sdias_copy(hsa_buf, src / PAGE_SIZE + 2, 1)) {
411ed322 MH	75	TRACE("sclp_sdias_copy() failed\n");
	76	return -EIO;
	77	}
019d6bec MS	78	offset = src % PAGE_SIZE;
	79	bytes = min(PAGE_SIZE - offset, count);
	80	if (copy_to_user(dest, hsa_buf + offset, bytes))
411ed322	81	return -EFAULT;
019d6bec MS	82	src += bytes;
	83	dest += bytes;
	84	count -= bytes;
	85	}
411ed322 MH	86	return 0;
	87	}
	88
df9694c7 MS	89	/*
	90	* Copy memory from HSA to kernel memory (not reentrant):
	91	*
	92	* @dest: Kernel or user buffer where memory should be copied to
	93	* @src: Start address within HSA where data should be copied
	94	* @count: Size of buffer, which should be copied
	95	*/
	96	int memcpy_hsa_kernel(void *dest, unsigned long src, size_t count)
411ed322	97	{
019d6bec MS	98	unsigned long offset, bytes;
	99
	100	if (!hsa_available)
	101	return -ENODATA;
	102
	103	while (count) {
	104	if (sclp_sdias_copy(hsa_buf, src / PAGE_SIZE + 2, 1)) {
	105	TRACE("sclp_sdias_copy() failed\n");
	106	return -EIO;
	107	}
	108	offset = src % PAGE_SIZE;
	109	bytes = min(PAGE_SIZE - offset, count);
	110	memcpy(dest, hsa_buf + offset, bytes);
	111	src += bytes;
	112	dest += bytes;
	113	count -= bytes;
	114	}
	115	return 0;
411ed322 MH	116	}
411ed322 MH	117
ffa52d02	118	static int __init init_cpu_info(void)
411ed322	119	{
1a2c5840	120	struct save_area *sa;
411ed322 MH	121
411ed322 MH	122	/* get info for boot cpu from lowcore, stored in the HSA */
1a2c5840 MS	123	sa = save_area_boot_cpu();
1a2c5840 MS	124	if (!sa)
411ed322	125	return -ENOMEM;
1a2c5840	126	if (memcpy_hsa_kernel(hsa_buf, __LC_FPREGS_SAVE_AREA, 512) < 0) {
2a062ab4	127	TRACE("could not copy from HSA\n");
411ed322 MH	128	return -EIO;
411ed322 MH	129	}
1a2c5840	130	save_area_add_regs(sa, hsa_buf); /* vx registers are saved in smp.c */
411ed322 MH	131	return 0;
	132	}
	133
b4b3d128 MH	134	/*
	135	* Release the HSA
	136	*/
	137	static void release_hsa(void)
	138	{
	139	diag308(DIAG308_REL_HSA, NULL);
	140	hsa_available = 0;
	141	}
	142
12e0c95e FM	143	static ssize_t zcore_memmap_read(struct file filp, char __user buf,
	144	size_t count, loff_t *ppos)
	145	{
	146	return simple_read_from_buffer(buf, count, ppos, filp->private_data,
50be6345	147	memblock.memory.cnt * CHUNK_INFO_SIZE);
12e0c95e FM	148	}
	149
	150	static int zcore_memmap_open(struct inode inode, struct file filp)
	151	{
50be6345	152	struct memblock_region *reg;
12e0c95e	153	char *buf;
50be6345	154	int i = 0;
12e0c95e	155
50be6345	156	buf = kzalloc(memblock.memory.cnt * CHUNK_INFO_SIZE, GFP_KERNEL);
12e0c95e	157	if (!buf) {
12e0c95e FM	158	return -ENOMEM;
12e0c95e FM	159	}
50be6345 PH	160	for_each_memblock(memory, reg) {
	161	sprintf(buf + (i++ * CHUNK_INFO_SIZE), "%016llx %016llx ",
	162	(unsigned long long) reg->base,
	163	(unsigned long long) reg->size);
12e0c95e	164	}
12e0c95e	165	filp->private_data = buf;
58ea91c0	166	return nonseekable_open(inode, filp);
12e0c95e FM	167	}
	168
	169	static int zcore_memmap_release(struct inode inode, struct file filp)
	170	{
	171	kfree(filp->private_data);
	172	return 0;
	173	}
	174
	175	static const struct file_operations zcore_memmap_fops = {
	176	.owner = THIS_MODULE,
	177	.read = zcore_memmap_read,
	178	.open = zcore_memmap_open,
	179	.release = zcore_memmap_release,
6038f373	180	.llseek = no_llseek,
12e0c95e FM	181	};
12e0c95e FM	182
099b7651 FM	183	static ssize_t zcore_reipl_write(struct file filp, const char __user buf,
	184	size_t count, loff_t *ppos)
	185	{
	186	if (ipl_block) {
	187	diag308(DIAG308_SET, ipl_block);
	188	diag308(DIAG308_IPL, NULL);
	189	}
	190	return count;
	191	}
	192
	193	static int zcore_reipl_open(struct inode inode, struct file filp)
	194	{
58ea91c0	195	return nonseekable_open(inode, filp);
099b7651 FM	196	}
	197
	198	static int zcore_reipl_release(struct inode inode, struct file filp)
	199	{
	200	return 0;
	201	}
	202
	203	static const struct file_operations zcore_reipl_fops = {
	204	.owner = THIS_MODULE,
	205	.write = zcore_reipl_write,
	206	.open = zcore_reipl_open,
	207	.release = zcore_reipl_release,
6038f373	208	.llseek = no_llseek,
099b7651 FM	209	};
099b7651 FM	210
b4b3d128 MH	211	static ssize_t zcore_hsa_read(struct file filp, char __user buf,
	212	size_t count, loff_t *ppos)
	213	{
	214	static char str[18];
	215
	216	if (hsa_available)
37c5f6c8	217	snprintf(str, sizeof(str), "%lx\n", sclp.hsa_size);
b4b3d128 MH	218	else
	219	snprintf(str, sizeof(str), "0\n");
	220	return simple_read_from_buffer(buf, count, ppos, str, strlen(str));
	221	}
	222
	223	static ssize_t zcore_hsa_write(struct file filp, const char __user buf,
	224	size_t count, loff_t *ppos)
	225	{
	226	char value;
	227
	228	if (*ppos != 0)
	229	return -EPIPE;
	230	if (copy_from_user(&value, buf, 1))
	231	return -EFAULT;
	232	if (value != '0')
	233	return -EINVAL;
	234	release_hsa();
	235	return count;
	236	}
	237
	238	static const struct file_operations zcore_hsa_fops = {
	239	.owner = THIS_MODULE,
	240	.write = zcore_hsa_write,
	241	.read = zcore_hsa_read,
	242	.open = nonseekable_open,
	243	.llseek = no_llseek,
	244	};
	245
411ed322 MH	246	static int __init check_sdias(void)
411ed322 MH	247	{
37c5f6c8	248	if (!sclp.hsa_size) {
2a062ab4	249	TRACE("Could not determine HSA size\n");
e657d8fe	250	return -ENODEV;
411ed322 MH	251	}
	252	return 0;
	253	}
	254
099b7651 FM	255	/*
	256	* Provide IPL parameter information block from either HSA or memory
	257	* for future reipl
	258	*/
	259	static int __init zcore_reipl_init(void)
	260	{
	261	struct ipib_info ipib_info;
	262	int rc;
	263
	264	rc = memcpy_hsa_kernel(&ipib_info, __LC_DUMP_REIPL, sizeof(ipib_info));
	265	if (rc)
	266	return rc;
	267	if (ipib_info.ipib == 0)
	268	return 0;
	269	ipl_block = (void *) __get_free_page(GFP_KERNEL);
	270	if (!ipl_block)
	271	return -ENOMEM;
37c5f6c8	272	if (ipib_info.ipib < sclp.hsa_size)
099b7651 FM	273	rc = memcpy_hsa_kernel(ipl_block, ipib_info.ipib, PAGE_SIZE);
099b7651 FM	274	else
92fe3132	275	rc = memcpy_real(ipl_block, (void *) ipib_info.ipib, PAGE_SIZE);
76ef964c	276	if (rc \|\| csum_partial(ipl_block, ipl_block->hdr.len, 0) !=
159d1ff8	277	ipib_info.checksum) {
099b7651 FM	278	TRACE("Checksum does not match\n");
	279	free_page((unsigned long) ipl_block);
	280	ipl_block = NULL;
	281	}
	282	return 0;
	283	}
	284
411ed322 MH	285	static int __init zcore_init(void)
	286	{
	287	unsigned char arch;
	288	int rc;
	289
	290	if (ipl_info.type != IPL_TYPE_FCP_DUMP)
	291	return -ENODATA;
3f25dc4f MH	292	if (OLDMEM_BASE)
3f25dc4f MH	293	return -ENODATA;
411ed322 MH	294
	295	zcore_dbf = debug_register("zcore", 4, 1, 4 * sizeof(long));
	296	debug_register_view(zcore_dbf, &debug_sprintf_view);
	297	debug_set_level(zcore_dbf, 6);
	298
	299	TRACE("devno: %x\n", ipl_info.data.fcp.dev_id.devno);
	300	TRACE("wwpn: %llx\n", (unsigned long long) ipl_info.data.fcp.wwpn);
	301	TRACE("lun: %llx\n", (unsigned long long) ipl_info.data.fcp.lun);
	302
763968e2	303	rc = sclp_sdias_init();
411ed322 MH	304	if (rc)
	305	goto fail;
	306
	307	rc = check_sdias();
2a062ab4	308	if (rc)
411ed322	309	goto fail;
b4b3d128	310	hsa_available = 1;
411ed322 MH	311
411ed322 MH	312	rc = memcpy_hsa_kernel(&arch, __LC_AR_MODE_ID, 1);
2a062ab4	313	if (rc)
411ed322	314	goto fail;
411ed322	315
f64ca217 HC	316	if (arch == ARCH_S390) {
	317	pr_alert("The 64-bit dump tool cannot be used for a "
	318	"32-bit system\n");
	319	rc = -EINVAL;
	320	goto fail;
	321	}
411ed322	322
ffa52d02 MS	323	pr_alert("DETECTED 'S390X (64 bit) OS'\n");
ffa52d02 MS	324	rc = init_cpu_info();
2a062ab4	325	if (rc)
411ed322	326	goto fail;
411ed322	327
099b7651 FM	328	rc = zcore_reipl_init();
	329	if (rc)
	330	goto fail;
	331
411ed322 MH	332	zcore_dir = debugfs_create_dir("zcore" , NULL);
	333	if (!zcore_dir) {
	334	rc = -ENOMEM;
	335	goto fail;
	336	}
12e0c95e FM	337	zcore_memmap_file = debugfs_create_file("memmap", S_IRUSR, zcore_dir,
	338	NULL, &zcore_memmap_fops);
	339	if (!zcore_memmap_file) {
	340	rc = -ENOMEM;
ffa52d02	341	goto fail_dir;
411ed322	342	}
099b7651 FM	343	zcore_reipl_file = debugfs_create_file("reipl", S_IRUSR, zcore_dir,
	344	NULL, &zcore_reipl_fops);
	345	if (!zcore_reipl_file) {
	346	rc = -ENOMEM;
	347	goto fail_memmap_file;
	348	}
b4b3d128 MH	349	zcore_hsa_file = debugfs_create_file("hsa", S_IRUSR\|S_IWUSR, zcore_dir,
	350	NULL, &zcore_hsa_fops);
	351	if (!zcore_hsa_file) {
	352	rc = -ENOMEM;
	353	goto fail_reipl_file;
	354	}
411ed322 MH	355	return 0;
411ed322 MH	356
b4b3d128 MH	357	fail_reipl_file:
b4b3d128 MH	358	debugfs_remove(zcore_reipl_file);
099b7651 FM	359	fail_memmap_file:
099b7651 FM	360	debugfs_remove(zcore_memmap_file);
12e0c95e FM	361	fail_dir:
12e0c95e FM	362	debugfs_remove(zcore_dir);
411ed322 MH	363	fail:
	364	diag308(DIAG308_REL_HSA, NULL);
	365	return rc;
	366	}
	367
411ed322 MH	368	static void __exit zcore_exit(void)
	369	{
	370	debug_unregister(zcore_dbf);
763968e2	371	sclp_sdias_exit();
099b7651	372	free_page((unsigned long) ipl_block);
b4b3d128	373	debugfs_remove(zcore_hsa_file);
099b7651 FM	374	debugfs_remove(zcore_reipl_file);
099b7651 FM	375	debugfs_remove(zcore_memmap_file);
099b7651	376	debugfs_remove(zcore_dir);
411ed322 MH	377	diag308(DIAG308_REL_HSA, NULL);
	378	}
	379
099b7651	380	MODULE_AUTHOR("Copyright IBM Corp. 2003,2008");
411ed322 MH	381	MODULE_DESCRIPTION("zcore module for zfcpdump support");
	382	MODULE_LICENSE("GPL");
	383
	384	subsys_initcall(zcore_init);
	385	module_exit(zcore_exit);