Commit 18e22a17 authored by Sebastian Ott's avatar Sebastian Ott Committed by Martin Schwidefsky
Browse files

s390: add support for ipl devices in subchannel sets > 0 



Allow to ipl from CCW based devices residing in any subchannel set.

Reviewed-by: default avatarMichael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: default avatarSebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent e0bedada

arch/s390/include/asm/cio.h

+1 −0
Original line number Diff line number Diff line
@@ -312,6 +312,7 @@ extern void css_schedule_reprobe(void); 
extern void reipl_ccw_dev(struct ccw_dev_id *id);



struct cio_iplinfo {

	u8 ssid;

	u16 devno;

	int is_qdio;

};

arch/s390/include/asm/ipl.h

+2 −1
Original line number Diff line number Diff line
@@ -64,7 +64,8 @@ struct ipl_block_fcp { 


struct ipl_block_ccw {

	u8  reserved1[84];

	u8  reserved2[2];

	u16 reserved2 : 13;

	u8  ssid : 3;

	u16 devno;

	u8  vm_flags;

	u8  reserved3[3];

arch/s390/kernel/ipl.c

+37 −11
Original line number Diff line number Diff line
@@ -121,6 +121,7 @@ static char *dump_type_str(enum dump_type type) 
 * Must be in data section since the bss section

 * is not cleared when these are accessed.

 */

static u8 ipl_ssid __attribute__((__section__(".data"))) = 0;

static u16 ipl_devno __attribute__((__section__(".data"))) = 0;

u32 ipl_flags __attribute__((__section__(".data"))) = 0;
@@ -197,6 +198,33 @@ static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \ 
	return snprintf(page, PAGE_SIZE, _format, ##args);		\

}



#define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk)			\

static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,	\

		struct kobj_attribute *attr,				\

		const char *buf, size_t len)				\

{									\

	unsigned long long ssid, devno;					\

									\

	if (sscanf(buf, "0.%llx.%llx\n", &ssid, &devno) != 2)		\

		return -EINVAL;						\

									\

	if (ssid > __MAX_SSID || devno > __MAX_SUBCHANNEL)		\

		return -EINVAL;						\

									\

	_ipl_blk.ssid = ssid;						\

	_ipl_blk.devno = devno;						\

	return len;							\

}



#define DEFINE_IPL_CCW_ATTR_RW(_prefix, _name, _ipl_blk)		\

IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n",				\

		 _ipl_blk.ssid, _ipl_blk.devno);			\

IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk);			\

static struct kobj_attribute sys_##_prefix##_##_name##_attr =		\

	__ATTR(_name, (S_IRUGO | S_IWUSR),				\

	       sys_##_prefix##_##_name##_show,				\

	       sys_##_prefix##_##_name##_store)				\



#define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value)		\

IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value)			\

static struct kobj_attribute sys_##_prefix##_##_name##_attr =		\
@@ -395,7 +423,7 @@ static ssize_t sys_ipl_device_show(struct kobject *kobj, 


	switch (ipl_info.type) {

	case IPL_TYPE_CCW:

		return sprintf(page, "0.0.%04x\n", ipl_devno);

		return sprintf(page, "0.%x.%04x\n", ipl_ssid, ipl_devno);

	case IPL_TYPE_FCP:

	case IPL_TYPE_FCP_DUMP:

		return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
@@ -807,9 +835,7 @@ static struct attribute_group reipl_fcp_attr_group = { 
};



/* CCW reipl device attributes */



DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",

	reipl_block_ccw->ipl_info.ccw.devno);

DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ipl_info.ccw);



/* NSS wrapper */

static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
@@ -1049,8 +1075,8 @@ static void __reipl_run(void *unused) 


	switch (reipl_method) {

	case REIPL_METHOD_CCW_CIO:

		devid.ssid  = reipl_block_ccw->ipl_info.ccw.ssid;

		devid.devno = reipl_block_ccw->ipl_info.ccw.devno;

		devid.ssid  = 0;

		reipl_ccw_dev(&devid);

		break;

	case REIPL_METHOD_CCW_VM:
@@ -1185,6 +1211,7 @@ static int __init reipl_ccw_init(void) 


	reipl_block_ccw_init(reipl_block_ccw);

	if (ipl_info.type == IPL_TYPE_CCW) {

		reipl_block_ccw->ipl_info.ccw.ssid = ipl_ssid;

		reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;

		reipl_block_ccw_fill_parms(reipl_block_ccw);

	}
@@ -1329,9 +1356,7 @@ static struct attribute_group dump_fcp_attr_group = { 
};



/* CCW dump device attributes */



DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",

		   dump_block_ccw->ipl_info.ccw.devno);

DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ipl_info.ccw);



static struct attribute *dump_ccw_attrs[] = {

	&sys_dump_ccw_device_attr.attr,
@@ -1411,8 +1436,8 @@ static void __dump_run(void *unused) 


	switch (dump_method) {

	case DUMP_METHOD_CCW_CIO:

		devid.ssid  = dump_block_ccw->ipl_info.ccw.ssid;

		devid.devno = dump_block_ccw->ipl_info.ccw.devno;

		devid.ssid  = 0;

		reipl_ccw_dev(&devid);

		break;

	case DUMP_METHOD_CCW_VM:
@@ -1932,14 +1957,14 @@ void __init setup_ipl(void) 
	ipl_info.type = get_ipl_type();

	switch (ipl_info.type) {

	case IPL_TYPE_CCW:

		ipl_info.data.ccw.dev_id.ssid = ipl_ssid;

		ipl_info.data.ccw.dev_id.devno = ipl_devno;

		ipl_info.data.ccw.dev_id.ssid = 0;

		break;

	case IPL_TYPE_FCP:

	case IPL_TYPE_FCP_DUMP:

		ipl_info.data.fcp.dev_id.ssid = 0;

		ipl_info.data.fcp.dev_id.devno =

			IPL_PARMBLOCK_START->ipl_info.fcp.devno;

		ipl_info.data.fcp.dev_id.ssid = 0;

		ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;

		ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;

		break;
@@ -1971,6 +1996,7 @@ void __init ipl_save_parameters(void) 
	if (cio_get_iplinfo(&iplinfo))

		return;



	ipl_ssid = iplinfo.ssid;

	ipl_devno = iplinfo.devno;

	ipl_flags |= IPL_DEVNO_VALID;

	if (!iplinfo.is_qdio)

drivers/s390/cio/chsc.c

+17 −20
Original line number Diff line number Diff line
@@ -1080,28 +1080,10 @@ void __init chsc_init_cleanup(void) 
	free_page((unsigned long)sei_page);

}



int chsc_enable_facility(int operation_code)

int __chsc_enable_facility(struct chsc_sda_area *sda_area, int operation_code)

{

	unsigned long flags;

	int ret;

	struct {

		struct chsc_header request;

		u8 reserved1:4;

		u8 format:4;

		u8 reserved2;

		u16 operation_code;

		u32 reserved3;

		u32 reserved4;

		u32 operation_data_area[252];

		struct chsc_header response;

		u32 reserved5:4;

		u32 format2:4;

		u32 reserved6:24;

	} __attribute__ ((packed)) *sda_area;



	spin_lock_irqsave(&chsc_page_lock, flags);

	memset(chsc_page, 0, PAGE_SIZE);

	sda_area = chsc_page;

	sda_area->request.length = 0x0400;

	sda_area->request.code = 0x0031;

	sda_area->operation_code = operation_code;
@@ -1119,10 +1101,25 @@ int chsc_enable_facility(int operation_code) 
	default:

		ret = chsc_error_from_response(sda_area->response.code);

	}

out:

	return ret;

}



int chsc_enable_facility(int operation_code)

{

	struct chsc_sda_area *sda_area;

	unsigned long flags;

	int ret;



	spin_lock_irqsave(&chsc_page_lock, flags);

	memset(chsc_page, 0, PAGE_SIZE);

	sda_area = chsc_page;



	ret = __chsc_enable_facility(sda_area, operation_code);

	if (ret != 0)

		CIO_CRW_EVENT(2, "chsc: sda (oc=%x) failed (rc=%04x)\n",

			      operation_code, sda_area->response.code);

out:



	spin_unlock_irqrestore(&chsc_page_lock, flags);

	return ret;

}

drivers/s390/cio/chsc.h

+15 −0
Original line number Diff line number Diff line
@@ -115,6 +115,20 @@ struct chsc_scpd { 
	u8 data[PAGE_SIZE - 20];

} __attribute__ ((packed));



struct chsc_sda_area {

	struct chsc_header request;

	u8 :4;

	u8 format:4;

	u8 :8;

	u16 operation_code;

	u32 :32;

	u32 :32;

	u32 operation_data_area[252];

	struct chsc_header response;

	u32 :4;

	u32 format2:4;

	u32 :24;

} __packed __aligned(PAGE_SIZE);



extern int chsc_get_ssd_info(struct subchannel_id schid,

			     struct chsc_ssd_info *ssd);
@@ -122,6 +136,7 @@ extern int chsc_determine_css_characteristics(void); 
extern int chsc_init(void);

extern void chsc_init_cleanup(void);



int __chsc_enable_facility(struct chsc_sda_area *sda_area, int operation_code);

extern int chsc_enable_facility(int);

struct channel_subsystem;

extern int chsc_secm(struct channel_subsystem *, int);