Commit be589d04 authored by David S. Miller's avatar David S. Miller
Browse files

Merge branch 'net-smc-introduce-SMC-Dv2-support' 

Karsten Graul says:

====================
net/smc: introduce SMC-Dv2 support

SMC-Dv2 support (see https://www.ibm.com/support/pages/node/6326337

)
provides multi-subnet support for SMC-D, eliminating the current
same-subnet restriction. The new version detects if any of the virtual
ISM devices are on the same system and can therefore be used for an
SMC-Dv2 connection. Furthermore, SMC-Dv2 eliminates the need for
PNET IDs on s390.
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents 414698f6 e8d726c8

drivers/s390/net/ism.h

+7 −0
Original line number Diff line number Diff line
@@ -16,6 +16,7 @@ 
#define ISM_DMB_WORD_OFFSET	1

#define ISM_DMB_BIT_OFFSET	(ISM_DMB_WORD_OFFSET * 32)

#define ISM_NR_DMBS		1920

#define ISM_IDENT_MASK		0x00FFFF



#define ISM_REG_SBA	0x1

#define ISM_REG_IEQ	0x2
@@ -206,6 +207,12 @@ struct ism_dev { 
#define ISM_CREATE_REQ(dmb, idx, sf, offset)		\

	((dmb) | (idx) << 24 | (sf) << 23 | (offset))



struct ism_systemeid {

	u8	seid_string[24];

	u8	serial_number[4];

	u8	type[4];

};



static inline void __ism_read_cmd(struct ism_dev *ism, void *data,

				  unsigned long offset, unsigned long len)

{

drivers/s390/net/ism_drv.c

+47 −0
Original line number Diff line number Diff line
@@ -13,6 +13,8 @@ 
#include <linux/device.h>

#include <linux/pci.h>

#include <linux/err.h>

#include <linux/ctype.h>

#include <linux/processor.h>

#include <net/smc.h>



#include <asm/debug.h>
@@ -387,6 +389,42 @@ static int ism_move(struct smcd_dev *smcd, u64 dmb_tok, unsigned int idx, 
	return 0;

}



static struct ism_systemeid SYSTEM_EID = {

	.seid_string = "IBM-SYSZ-IBMSEID00000000",

	.serial_number = "0000",

	.type = "0000",

};



static void ism_create_system_eid(void)

{

	struct cpuid id;

	u16 ident_tail;

	char tmp[5];



	get_cpu_id(&id);

	ident_tail = (u16)(id.ident & ISM_IDENT_MASK);

	snprintf(tmp, 5, "%04X", ident_tail);

	memcpy(&SYSTEM_EID.serial_number, tmp, 4);

	snprintf(tmp, 5, "%04X", id.machine);

	memcpy(&SYSTEM_EID.type, tmp, 4);

}



static void ism_get_system_eid(struct smcd_dev *smcd, u8 **eid)

{

	*eid = &SYSTEM_EID.seid_string[0];

}



static u16 ism_get_chid(struct smcd_dev *smcd)

{

	struct ism_dev *ismdev;



	ismdev = (struct ism_dev *)smcd->priv;

	if (!ismdev || !ismdev->pdev)

		return 0;



	return to_zpci(ismdev->pdev)->pchid;

}



static void ism_handle_event(struct ism_dev *ism)

{

	struct smcd_event *entry;
@@ -443,6 +481,8 @@ static const struct smcd_ops ism_ops = { 
	.reset_vlan_required = ism_reset_vlan_required,

	.signal_event = ism_signal_ieq,

	.move_data = ism_move,

	.get_system_eid = ism_get_system_eid,

	.get_chid = ism_get_chid,

};



static int ism_dev_init(struct ism_dev *ism)
@@ -471,6 +511,10 @@ static int ism_dev_init(struct ism_dev *ism) 
	if (ret)

		goto unreg_ieq;



	if (!ism_add_vlan_id(ism->smcd, ISM_RESERVED_VLANID))

		/* hardware is V2 capable */

		ism_create_system_eid();



	ret = smcd_register_dev(ism->smcd);

	if (ret)

		goto unreg_ieq;
@@ -550,6 +594,9 @@ static void ism_dev_exit(struct ism_dev *ism) 
	struct pci_dev *pdev = ism->pdev;



	smcd_unregister_dev(ism->smcd);

	if (SYSTEM_EID.serial_number[0] != '0' ||

	    SYSTEM_EID.type[0] != '0')

		ism_del_vlan_id(ism->smcd, ISM_RESERVED_VLANID);

	unregister_ieq(ism);

	unregister_sba(ism);

	free_irq(pci_irq_vector(pdev, 0), ism);

include/net/smc.h

+4 −0
Original line number Diff line number Diff line
@@ -37,6 +37,8 @@ struct smcd_dmb { 
#define ISM_EVENT_GID	1

#define ISM_EVENT_SWR	2



#define ISM_RESERVED_VLANID	0x1FFF



#define ISM_ERROR	0xFFFF



struct smcd_event {
@@ -63,6 +65,8 @@ struct smcd_ops { 
	int (*move_data)(struct smcd_dev *dev, u64 dmb_tok, unsigned int idx,

			 bool sf, unsigned int offset, void *data,

			 unsigned int size);

	void (*get_system_eid)(struct smcd_dev *dev, u8 **eid);

	u16 (*get_chid)(struct smcd_dev *dev);

};



struct smcd_dev {

net/smc/af_smc.c

+490 −123

File changed.

Preview size limit exceeded, changes collapsed.

net/smc/smc.h

+12 −0
Original line number Diff line number Diff line
@@ -19,10 +19,19 @@ 
#include "smc_ib.h"



#define SMC_V1		1		/* SMC version V1 */

#define SMC_V2		2		/* SMC version V2 */

#define SMC_RELEASE	0



#define SMCPROTO_SMC		0	/* SMC protocol, IPv4 */

#define SMCPROTO_SMC6		1	/* SMC protocol, IPv6 */



#define SMC_MAX_ISM_DEVS	8	/* max # of proposed non-native ISM

					 * devices

					 */



#define SMC_MAX_HOSTNAME_LEN	32

#define SMC_MAX_EID_LEN		32



extern struct proto smc_proto;

extern struct proto smc_proto6;
@@ -246,6 +255,9 @@ extern struct workqueue_struct *smc_close_wq; /* wq for close work */ 


extern u8	local_systemid[SMC_SYSTEMID_LEN]; /* unique system identifier */



#define ntohll(x) be64_to_cpu(x)

#define htonll(x) cpu_to_be64(x)



/* convert an u32 value into network byte order, store it into a 3 byte field */

static inline void hton24(u8 *net, u32 host)

{

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