diff options
| author | Ursula Braun <ubraun@linux.ibm.com> | 2020-09-26 12:44:24 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-09-29 00:19:02 +0200 |
| commit | 201091ebb2a161a0e10aab36186690b332941f6a (patch) | |
| tree | 39b87ea12d877c20b462137ad831b50bd4591236 /drivers | |
| parent | net/smc: prepare for more proposed ISM devices (diff) | |
| download | linux-201091ebb2a161a0e10aab36186690b332941f6a.tar.xz linux-201091ebb2a161a0e10aab36186690b332941f6a.zip | |
net/smc: introduce System Enterprise ID (SEID)
SMCD version 2 defines a System Enterprise ID (short SEID).
This patch contains the SEID creation and adds the callback to
retrieve the created SEID.
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/s390/net/ism.h | 7 | ||||
| -rw-r--r-- | drivers/s390/net/ism_drv.c | 35 |
2 files changed, 42 insertions, 0 deletions
diff --git a/drivers/s390/net/ism.h b/drivers/s390/net/ism.h index 1901e9c80ed8..38fe90c2597d 100644 --- a/drivers/s390/net/ism.h +++ b/drivers/s390/net/ism.h @@ -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) { diff --git a/drivers/s390/net/ism_drv.c b/drivers/s390/net/ism_drv.c index 5fbe9eae84d1..c452ea5d9c8a 100644 --- a/drivers/s390/net/ism_drv.c +++ b/drivers/s390/net/ism_drv.c @@ -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 +389,31 @@ 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 void ism_handle_event(struct ism_dev *ism) { struct smcd_event *entry; @@ -443,6 +470,7 @@ 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, }; static int ism_dev_init(struct ism_dev *ism) @@ -471,6 +499,10 @@ 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 +582,9 @@ 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); |