From patchwork Thu Mar 24 08:29:58 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cornelia Huck X-Patchwork-Id: 601496 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3qW09F6SHXz9sC3 for ; Thu, 24 Mar 2016 19:34:41 +1100 (AEDT) Received: from localhost ([::1]:48514 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aj0j2-0000gT-4N for incoming@patchwork.ozlabs.org; Thu, 24 Mar 2016 04:34:40 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:51952) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aj0el-00018N-J0 for qemu-devel@nongnu.org; Thu, 24 Mar 2016 04:30:17 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aj0ej-0001gv-Se for qemu-devel@nongnu.org; Thu, 24 Mar 2016 04:30:15 -0400 Received: from e06smtp06.uk.ibm.com ([195.75.94.102]:38505) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aj0ej-0001ge-Ec for qemu-devel@nongnu.org; Thu, 24 Mar 2016 04:30:13 -0400 Received: from localhost by e06smtp06.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Thu, 24 Mar 2016 08:30:11 -0000 X-IBM-Helo: d06dlp02.portsmouth.uk.ibm.com X-IBM-MailFrom: cornelia.huck@de.ibm.com X-IBM-RcptTo: qemu-devel@nongnu.org Received: from b06cxnps4074.portsmouth.uk.ibm.com (d06relay11.portsmouth.uk.ibm.com [9.149.109.196]) by d06dlp02.portsmouth.uk.ibm.com (Postfix) with ESMTP id 4D9332190046 for ; Thu, 24 Mar 2016 08:29:52 +0000 (GMT) Received: from d06av06.portsmouth.uk.ibm.com (d06av06.portsmouth.uk.ibm.com [9.149.37.217]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u2O8UB3o5898720 for ; Thu, 24 Mar 2016 08:30:11 GMT Received: from d06av06.portsmouth.uk.ibm.com (localhost [127.0.0.1]) by d06av06.portsmouth.uk.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u2O8UA8f005717 for ; Thu, 24 Mar 2016 04:30:10 -0400 Received: from gondolin.boeblingen.de.ibm.com (dyn-9-152-224-197.boeblingen.de.ibm.com [9.152.224.197]) by d06av06.portsmouth.uk.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id u2O8U5Sf005417 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Thu, 24 Mar 2016 04:30:10 -0400 From: Cornelia Huck To: peter.maydell@linaro.org Date: Thu, 24 Mar 2016 09:29:58 +0100 Message-Id: <1458808203-21339-10-git-send-email-cornelia.huck@de.ibm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1458808203-21339-1-git-send-email-cornelia.huck@de.ibm.com> References: <1458808203-21339-1-git-send-email-cornelia.huck@de.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16032408-0025-0000-0000-0000091E193F X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 195.75.94.102 Cc: qemu-devel@nongnu.org, agraf@suse.de, borntraeger@de.ibm.com, jfrei@linux.vnet.ibm.com, Cornelia Huck , "Eugene \(jno\) Dvurechenski" Subject: [Qemu-devel] [PULL for-2.6 09/14] pc-bios/s390-ccw: add scsi definitions X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: "Eugene (jno) Dvurechenski" Add scsi.h to provide basic definitions for SCSI. Signed-off-by: Eugene (jno) Dvurechenski Signed-off-by: Cornelia Huck --- pc-bios/s390-ccw/scsi.h | 184 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 184 insertions(+) create mode 100644 pc-bios/s390-ccw/scsi.h diff --git a/pc-bios/s390-ccw/scsi.h b/pc-bios/s390-ccw/scsi.h new file mode 100644 index 0000000..fc830f7 --- /dev/null +++ b/pc-bios/s390-ccw/scsi.h @@ -0,0 +1,184 @@ +/* + * SCSI definitions for s390 machine loader for qemu + * + * Copyright 2015 IBM Corp. + * Author: Eugene "jno" Dvurechenski + * + * This work is licensed under the terms of the GNU GPL, version 2 or (at + * your option) any later version. See the COPYING file in the top-level + * directory. + */ + +#ifndef SCSI_H +#define SCSI_H + +#include "s390-ccw.h" + +#define SCSI_DEFAULT_CDB_SIZE 32 +#define SCSI_DEFAULT_SENSE_SIZE 96 + +#define CDB_STATUS_GOOD 0 +#define CDB_STATUS_CHECK_CONDITION 0x02U +#define CDB_STATUS_VALID(status) (((status) & ~0x3eU) == 0) + +#define SCSI_SENSE_CODE_MASK 0x7fU +#define SCSI_SENSE_KEY_MASK 0x0fU +#define SCSI_SENSE_KEY_NO_SENSE 0 +#define SCSI_SENSE_KEY_UNIT_ATTENTION 6 + +union ScsiLun { + uint64_t v64; /* numeric shortcut */ + uint8_t v8[8]; /* generic 8 bytes representation */ + uint16_t v16[4]; /* 4-level big-endian LUN as specified by SAM-2 */ +}; +typedef union ScsiLun ScsiLun; + +struct ScsiSense70 { + uint8_t b0; /* b0 & 7f = resp code (0x70 or 0x71) */ + uint8_t b1, b2; /* b2 & 0f = sense key */ + uint8_t u1[1 * 4 + 1 + 1 * 4]; /* b7 = N - 7 */ + uint8_t additional_sense_code; /* b12 */ + uint8_t additional_sense_code_qualifier; /* b13 */ + uint8_t u2[1 + 3 + 0]; /* up to N (<=252) bytes */ +} __attribute__((packed)); +typedef struct ScsiSense70 ScsiSense70; + +/* don't confuse with virtio-scsi response/status fields! */ + +static inline uint8_t scsi_sense_response(const void *p) +{ + return ((const ScsiSense70 *)p)->b0 & SCSI_SENSE_CODE_MASK; +} + +static inline uint8_t scsi_sense_key(const void *p) +{ + return ((const ScsiSense70 *)p)->b2 & SCSI_SENSE_KEY_MASK; +} + +#define SCSI_INQ_RDT_CDROM 0x05 + +struct ScsiInquiryStd { + uint8_t peripheral_qdt; /* b0, use (b0 & 0x1f) to get SCSI_INQ_RDT */ + uint8_t b1; /* Removable Media Bit = b1 & 0x80 */ + uint8_t spc_version; /* b2 */ + uint8_t b3; /* b3 & 0x0f == resp_data_fmt == 2, must! */ + uint8_t u1[1 + 1 + 1 + 1 + 8]; /* b4..b15 unused, b4 = (N - 1) */ + char prod_id[16]; /* "QEMU CD-ROM" is here */ + uint8_t u2[4 /* b32..b35 unused, mandatory */ + + 8 + 12 + 1 + 1 + 8 * 2 + 22 /* b36..95 unused, optional*/ + + 0]; /* b96..bN unused, vendor specific */ + /* byte N */ +} __attribute__((packed)); +typedef struct ScsiInquiryStd ScsiInquiryStd; + +struct ScsiCdbInquiry { + uint8_t command; /* b0, == 0x12 */ + uint8_t b1; /* b1, |= 0x01 (evpd) */ + uint8_t b2; /* b2; if evpd==1 */ + uint16_t alloc_len; /* b3, b4 */ + uint8_t control; /* b5 */ +} __attribute__((packed)); +typedef struct ScsiCdbInquiry ScsiCdbInquiry; + +struct ScsiCdbRead10 { + uint8_t command; /* =0x28 */ + uint8_t b1; + uint32_t lba; + uint8_t b6; + uint16_t xfer_length; + uint8_t control; +} __attribute__((packed)); +typedef struct ScsiCdbRead10 ScsiCdbRead10; + +struct ScsiCdbTestUnitReady { + uint8_t command; /* =0x00 */ + uint8_t b1_b4[4]; + uint8_t control; +} __attribute__((packed)); +typedef struct ScsiCdbTestUnitReady ScsiCdbTestUnitReady; + +struct ScsiCdbReportLuns { + uint8_t command; /* =0xa0 */ + uint8_t b1; + uint8_t select_report; /* =0x02, "all" */ + uint8_t b3_b5[3]; + uint32_t alloc_len; + uint8_t b10; + uint8_t control; +} __attribute__((packed)); +typedef struct ScsiCdbReportLuns ScsiCdbReportLuns; + +struct ScsiLunReport { + uint32_t lun_list_len; + uint32_t b4_b7; + ScsiLun lun[1]; /* space for at least 1 lun must be allocated */ +} __attribute__((packed)); +typedef struct ScsiLunReport ScsiLunReport; + +struct ScsiCdbReadCapacity16 { + uint8_t command; /* =0x9e = "service action in 16" */ + uint8_t service_action; /* 5 bits, =0x10 = "read capacity 16" */ + uint64_t b2_b9; + uint32_t alloc_len; + uint8_t b14; + uint8_t control; +} __attribute__((packed)); +typedef struct ScsiCdbReadCapacity16 ScsiCdbReadCapacity16; + +struct ScsiReadCapacity16Data { + uint64_t ret_lba; /* get it, 0..7 */ + uint32_t lb_len; /* bytes, 8..11 */ + uint8_t u1[2 + 1 * 2 + 16]; /* b12..b31, unused */ +} __attribute__((packed)); +typedef struct ScsiReadCapacity16Data ScsiReadCapacity16Data; + +static inline ScsiLun make_lun(uint16_t channel, uint16_t target, uint32_t lun) +{ + ScsiLun r = { .v64 = 0 }; + + /* See QEMU code to choose the way to handle LUNs. + * + * So, a valid LUN must have (always channel #0): + * lun[0] == 1 + * lun[1] - target, any value + * lun[2] == 0 or (LUN, MSB, 0x40 set, 0x80 clear) + * lun[3] - LUN, LSB, any value + */ + r.v8[0] = 1; + r.v8[1] = target & 0xffU; + r.v8[2] = (lun >> 8) & 0x3fU; + if (r.v8[2]) { + r.v8[2] |= 0x40; + } + r.v8[3] = lun & 0xffU; + + return r; +} + +static inline const char *scsi_cdb_status_msg(uint8_t status) +{ + static char err_msg[] = "STATUS=XX"; + uint8_t v = status & 0x3eU; + + fill_hex_val(err_msg + 7, &v, 1); + return err_msg; +} + +static inline const char *scsi_cdb_asc_msg(const void *s) +{ + static char err_msg[] = "RSPN=XX KEY=XX CODE=XX QLFR=XX"; + const ScsiSense70 *p = s; + uint8_t sr = scsi_sense_response(s); + uint8_t sk = scsi_sense_key(s); + uint8_t ac = p->additional_sense_code; + uint8_t cq = p->additional_sense_code_qualifier; + + fill_hex_val(err_msg + 5, &sr, 1); + fill_hex_val(err_msg + 12, &sk, 1); + fill_hex_val(err_msg + 20, &ac, 1); + fill_hex_val(err_msg + 28, &cq, 1); + + return err_msg; +} + +#endif /* SCSI_H */