/** * The ap_qid_t identifier of an ap queue. * If the AP facilities test (APFT) facility is available, * card and queue index are 8 bit values, otherwise * card index is 6 bit and queue index a 4 bit value.
*/ typedefunsignedint ap_qid_t;
/** * struct ap_queue_status - Holds the AP queue status. * @queue_empty: Shows if queue is empty * @replies_waiting: Waiting replies * @queue_full: Is 1 if the queue is full * @irq_enabled: Shows if interrupts are enabled for the AP * @response_code: Holds the 8 bit response code * * The ap queue status word is returned by all three AP functions * (PQAP, NQAP and DQAP). There's a set of flags in the first * byte, followed by a 1 byte response code.
*/ struct ap_queue_status { unsignedint queue_empty : 1; unsignedint replies_waiting : 1; unsignedint queue_full : 1; unsignedint : 3; unsignedint async : 1; unsignedint irq_enabled : 1; unsignedint response_code : 8; unsignedint : 16;
};
/* * AP queue status reg union to access the reg1 * register with the lower 32 bits comprising the * ap queue status.
*/ union ap_queue_status_reg { unsignedlong value; struct {
u32 _pad; struct ap_queue_status status;
};
};
/** * ap_intructions_available() - Test if AP instructions are available. * * Returns true if the AP instructions are installed, otherwise false.
*/ staticinlinebool ap_instructions_available(void)
{ unsignedlong reg0 = AP_MKQID(0, 0); unsignedlong reg1 = 0;
/* TAPQ register GR2 response struct */ struct ap_tapq_hwinfo { union { unsignedlong value; struct { unsignedint fac : 32; /* facility bits */ unsignedint apinfo : 32; /* ap type, ... */
}; struct { unsignedint apsc : 1; /* APSC */ unsignedint mex4k : 1; /* AP4KM */ unsignedint crt4k : 1; /* AP4KC */ unsignedint cca : 1; /* D */ unsignedint accel : 1; /* A */ unsignedint ep11 : 1; /* X */ unsignedint apxa : 1; /* APXA */ unsignedint slcf : 1; /* Cmd filtering avail. */ unsignedintclass : 8; unsignedint bs : 2; /* SE bind/assoc */ unsignedint : 14; unsignedint at : 8; /* ap type */ unsignedint nd : 8; /* nr of domains */ unsignedint : 4; unsignedint ml : 4; /* apxl ml */ unsignedint : 4; unsignedint qd : 4; /* queue depth */
};
};
};
/* * Convenience defines to be used with the bs field from struct ap_tapq_gr2
*/ #define AP_BS_Q_USABLE 0 #define AP_BS_Q_USABLE_NO_SECURE_KEY 1 #define AP_BS_Q_AVAIL_FOR_BINDING 2 #define AP_BS_Q_UNUSABLE 3
/** * ap_tapq(): Test adjunct processor queue. * @qid: The AP queue number * @info: Pointer to tapq hwinfo struct * * Returns AP queue status structure.
*/ staticinlinestruct ap_queue_status ap_tapq(ap_qid_t qid, struct ap_tapq_hwinfo *info)
{ union ap_queue_status_reg reg1; unsignedlong reg2;
/** * ap_test_queue(): Test adjunct processor queue. * @qid: The AP queue number * @tbit: Test facilities bit * @info: Ptr to tapq gr2 struct * * Returns AP queue status structure.
*/ staticinlinestruct ap_queue_status ap_test_queue(ap_qid_t qid, int tbit, struct ap_tapq_hwinfo *info)
{ if (tbit)
qid |= 1UL << 23; /* set T bit*/ return ap_tapq(qid, info);
}
/** * ap_pqap_rapq(): Reset adjunct processor queue. * @qid: The AP queue number * @fbit: if != 0 set F bit * * Returns AP queue status structure.
*/ staticinlinestruct ap_queue_status ap_rapq(ap_qid_t qid, int fbit)
{ unsignedlong reg0 = qid | (1UL << 24); /* fc 1UL is RAPQ */ union ap_queue_status_reg reg1;
/** * ap_pqap_zapq(): Reset and zeroize adjunct processor queue. * @qid: The AP queue number * @fbit: if != 0 set F bit * * Returns AP queue status structure.
*/ staticinlinestruct ap_queue_status ap_zapq(ap_qid_t qid, int fbit)
{ unsignedlong reg0 = qid | (2UL << 24); /* fc 2UL is ZAPQ */ union ap_queue_status_reg reg1;
/** * struct ap_config_info - convenience struct for AP crypto * config info as returned by the ap_qci() function.
*/ struct ap_config_info { union { unsignedint flags; struct { unsignedint apsc : 1; /* S bit */ unsignedint apxa : 1; /* N bit */ unsignedint qact : 1; /* C bit */ unsignedint rc8a : 1; /* R bit */ unsignedint : 4; unsignedint apsb : 1; /* B bit */ unsignedint : 23;
};
}; unsignedchar na; /* max # of APs - 1 */ unsignedchar nd; /* max # of Domains - 1 */ unsignedchar _reserved0[10]; unsignedint apm[8]; /* AP ID mask */ unsignedint aqm[8]; /* AP (usage) queue mask */ unsignedint adm[8]; /* AP (control) domain mask */ unsignedchar _reserved1[16];
} __aligned(8);
/** * ap_qci(): Get AP configuration data * * Returns 0 on success, or -EOPNOTSUPP.
*/ staticinlineint ap_qci(struct ap_config_info *config)
{ unsignedlong reg0 = 4UL << 24; /* fc 4UL is QCI */ unsignedlong reg1 = -EOPNOTSUPP; struct ap_config_info *reg2 = config;
asmvolatile( " lgr 0,%[reg0]\n"/* QCI fc into gr0 */ " lgr 2,%[reg2]\n"/* ptr to config into gr2 */ " .insn rre,0xb2af0000,0,0\n"/* PQAP(QCI) */ "0: la %[reg1],0\n"/* good case, QCI fc available */ "1:\n"
EX_TABLE(0b, 1b)
: [reg1] "+&d" (reg1)
: [reg0] "d" (reg0), [reg2] "d" (reg2)
: "cc", "memory", "0", "2");
return reg1;
}
/* * struct ap_qirq_ctrl - convenient struct for easy invocation * of the ap_aqic() function. This struct is passed as GR1 * parameter to the PQAP(AQIC) instruction. For details please * see the AR documentation.
*/ union ap_qirq_ctrl { unsignedlong value; struct { unsignedint : 8; unsignedint zone : 8; /* zone info */ unsignedint ir : 1; /* ir flag: enable (1) or disable (0) irq */ unsignedint : 4; unsignedint gisc : 3; /* guest isc field */ unsignedint : 6; unsignedint gf : 2; /* gisa format */ unsignedint : 1; unsignedint gisa : 27; /* gisa origin */ unsignedint : 1; unsignedint isc : 3; /* irq sub class */
};
};
/** * ap_aqic(): Control interruption for a specific AP. * @qid: The AP queue number * @qirqctrl: struct ap_qirq_ctrl (64 bit value) * @pa_ind: Physical address of the notification indicator byte * * Returns AP queue status.
*/ staticinlinestruct ap_queue_status ap_aqic(ap_qid_t qid, union ap_qirq_ctrl qirqctrl,
phys_addr_t pa_ind)
{ unsignedlong reg0 = qid | (3UL << 24); /* fc 3UL is AQIC */ union ap_queue_status_reg reg1; unsignedlong reg2 = pa_ind;
/* * union ap_qact_ap_info - used together with the * ap_aqic() function to provide a convenient way * to handle the ap info needed by the qact function.
*/ union ap_qact_ap_info { unsignedlong val; struct { unsignedint : 3; unsignedint mode : 3; unsignedint : 26; unsignedint cat : 8; unsignedint : 8; unsignedchar ver[2];
};
};
/** * ap_qact(): Query AP compatibility type. * @qid: The AP queue number * @apinfo: On input the info about the AP queue. On output the * alternate AP queue info provided by the qact function * in GR2 is stored in. * * Returns AP queue status. Check response_code field for failures.
*/ staticinlinestruct ap_queue_status ap_qact(ap_qid_t qid, int ifbit, union ap_qact_ap_info *apinfo)
{ unsignedlong reg0 = qid | (5UL << 24) | ((ifbit & 0x01) << 22); union ap_queue_status_reg reg1; unsignedlong reg2;
reg1.value = apinfo->val;
asmvolatile( " lgr 0,%[reg0]\n"/* qid param into gr0 */ " lgr 1,%[reg1]\n"/* qact in info into gr1 */ " .insn rre,0xb2af0000,0,0\n"/* PQAP(QACT) */ " lgr %[reg1],1\n"/* gr1 (status) into reg1 */ " lgr %[reg2],2\n"/* qact out info into reg2 */
: [reg1] "+&d" (reg1.value), [reg2] "=&d" (reg2)
: [reg0] "d" (reg0)
: "cc", "0", "1", "2");
apinfo->val = reg2; return reg1.status;
}
/* * ap_bapq(): SE bind AP queue. * @qid: The AP queue number * * Returns AP queue status structure. * * Invoking this function in a non-SE environment * may case a specification exception.
*/ staticinlinestruct ap_queue_status ap_bapq(ap_qid_t qid)
{ unsignedlong reg0 = qid | (7UL << 24); /* fc 7 is BAPQ */ union ap_queue_status_reg reg1;
/* * ap_aapq(): SE associate AP queue. * @qid: The AP queue number * @sec_idx: The secret index * * Returns AP queue status structure. * * Invoking this function in a non-SE environment * may case a specification exception.
*/ staticinlinestruct ap_queue_status ap_aapq(ap_qid_t qid, unsignedint sec_idx)
{ unsignedlong reg0 = qid | (8UL << 24); /* fc 8 is AAPQ */ unsignedlong reg2 = sec_idx; union ap_queue_status_reg reg1;
/** * ap_nqap(): Send message to adjunct processor queue. * @qid: The AP queue number * @psmid: The program supplied message identifier * @msg: The message text * @length: The message length * * Returns AP queue status structure. * Condition code 1 on NQAP can't happen because the L bit is 1. * Condition code 2 on NQAP also means the send is incomplete, * because a segment boundary was reached. The NQAP is repeated.
*/ staticinlinestruct ap_queue_status ap_nqap(ap_qid_t qid, unsignedlonglong psmid, void *msg, size_t length)
{ unsignedlong reg0 = qid | 0x40000000UL; /* 0x4... is last msg part */ union register_pair nqap_r1, nqap_r2; union ap_queue_status_reg reg1;
/** * ap_dqap(): Receive message from adjunct processor queue. * @qid: The AP queue number * @psmid: Pointer to program supplied message identifier * @msg: Pointer to message buffer * @msglen: Message buffer size * @length: Pointer to length of actually written bytes * @reslength: Residual length on return * @resgr0: input: gr0 value (only used if != 0), output: residual gr0 content * * Returns AP queue status structure. * Condition code 1 on DQAP means the receive has taken place * but only partially. The response is incomplete, hence the * DQAP is repeated. * Condition code 2 on DQAP also means the receive is incomplete, * this time because a segment boundary was reached. Again, the * DQAP is repeated. * Note that gpr2 is used by the DQAP instruction to keep track of * any 'residual' length, in case the instruction gets interrupted. * Hence it gets zeroed before the instruction. * If the message does not fit into the buffer, this function will * return with a truncated message and the reply in the firmware queue * is not removed. This is indicated to the caller with an * ap_queue_status response_code value of all bits on (0xFF) and (if * the reslength ptr is given) the remaining length is stored in * *reslength and (if the resgr0 ptr is given) the updated gr0 value * for further processing of this msg entry is stored in *resgr0. The * caller needs to detect this situation and should invoke ap_dqap * with a valid resgr0 ptr and a value in there != 0 to indicate that * *resgr0 is to be used instead of qid to further process this entry.
*/ staticinlinestruct ap_queue_status ap_dqap(ap_qid_t qid, unsignedlong *psmid, void *msg, size_t msglen,
size_t *length,
size_t *reslength, unsignedlong *resgr0)
{ unsignedlong reg0 = resgr0 && *resgr0 ? *resgr0 : qid | 0x80000000UL; union ap_queue_status_reg reg1; unsignedlong reg2; union register_pair rp1, rp2;
asmvolatile( " lgr 0,%[reg0]\n"/* qid param into gr0 */ " lghi 2,0\n"/* 0 into gr2 (res length) */ "0: ltgr %N[rp2],%N[rp2]\n"/* check buf len */ " jz 2f\n"/* go out if buf len is 0 */ "1: .insn rre,0xb2ae0000,%[rp1],%[rp2]\n" " brc 6,0b\n"/* handle partial complete */ "2: lgr %[reg0],0\n"/* gr0 (qid + info) into reg0 */ " lgr %[reg1],1\n"/* gr1 (status) into reg1 */ " lgr %[reg2],2\n"/* gr2 (res length) into reg2 */
: [reg0] "+&d" (reg0), [reg1] "=&d" (reg1.value),
[reg2] "=&d" (reg2), [rp1] "+&d" (rp1.pair),
[rp2] "+&d" (rp2.pair)
:
: "cc", "memory", "0", "1", "2");
if (reslength)
*reslength = reg2; if (reg2 != 0 && rp2.odd == 0) { /* * Partially complete, status in gr1 is not set. * Signal the caller that this dqap is only partially received * with a special status response code 0xFF and *resgr0 updated
*/
reg1.status.response_code = 0xFF; if (resgr0)
*resgr0 = reg0;
} else {
*psmid = (rp1.even << 32) + rp1.odd; if (resgr0)
*resgr0 = 0;
}
/* update *length with the nr of bytes stored into the msg buffer */ if (length)
*length = msglen - rp2.odd;
return reg1.status;
}
#endif/* _ASM_S390_AP_H_ */
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