1cbf031f4SNicholas Bellinger /******************************************************************************* 2cbf031f4SNicholas Bellinger * Filename: target_core_xcopy.c 3cbf031f4SNicholas Bellinger * 4cbf031f4SNicholas Bellinger * This file contains support for SPC-4 Extended-Copy offload with generic 5cbf031f4SNicholas Bellinger * TCM backends. 6cbf031f4SNicholas Bellinger * 7cbf031f4SNicholas Bellinger * Copyright (c) 2011-2013 Datera, Inc. All rights reserved. 8cbf031f4SNicholas Bellinger * 9cbf031f4SNicholas Bellinger * Author: 10cbf031f4SNicholas Bellinger * Nicholas A. Bellinger <nab@daterainc.com> 11cbf031f4SNicholas Bellinger * 12cbf031f4SNicholas Bellinger * This program is free software; you can redistribute it and/or modify 13cbf031f4SNicholas Bellinger * it under the terms of the GNU General Public License as published by 14cbf031f4SNicholas Bellinger * the Free Software Foundation; either version 2 of the License, or 15cbf031f4SNicholas Bellinger * (at your option) any later version. 16cbf031f4SNicholas Bellinger * 17cbf031f4SNicholas Bellinger * This program is distributed in the hope that it will be useful, 18cbf031f4SNicholas Bellinger * but WITHOUT ANY WARRANTY; without even the implied warranty of 19cbf031f4SNicholas Bellinger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20cbf031f4SNicholas Bellinger * GNU General Public License for more details. 21cbf031f4SNicholas Bellinger * 22cbf031f4SNicholas Bellinger ******************************************************************************/ 23cbf031f4SNicholas Bellinger 24cbf031f4SNicholas Bellinger #include <linux/slab.h> 25cbf031f4SNicholas Bellinger #include <linux/spinlock.h> 26cbf031f4SNicholas Bellinger #include <linux/list.h> 27cbf031f4SNicholas Bellinger #include <linux/configfs.h> 28cbf031f4SNicholas Bellinger #include <scsi/scsi.h> 29cbf031f4SNicholas Bellinger #include <scsi/scsi_cmnd.h> 30cbf031f4SNicholas Bellinger #include <asm/unaligned.h> 31cbf031f4SNicholas Bellinger 32cbf031f4SNicholas Bellinger #include <target/target_core_base.h> 33cbf031f4SNicholas Bellinger #include <target/target_core_backend.h> 34cbf031f4SNicholas Bellinger #include <target/target_core_fabric.h> 35cbf031f4SNicholas Bellinger #include <target/target_core_configfs.h> 36cbf031f4SNicholas Bellinger 37b13876d2SChristoph Hellwig #include "target_core_internal.h" 38cbf031f4SNicholas Bellinger #include "target_core_pr.h" 39cbf031f4SNicholas Bellinger #include "target_core_ua.h" 40cbf031f4SNicholas Bellinger #include "target_core_xcopy.h" 41cbf031f4SNicholas Bellinger 42cbf031f4SNicholas Bellinger static struct workqueue_struct *xcopy_wq = NULL; 43cbf031f4SNicholas Bellinger 44cbf031f4SNicholas Bellinger static int target_xcopy_gen_naa_ieee(struct se_device *dev, unsigned char *buf) 45cbf031f4SNicholas Bellinger { 46cbf031f4SNicholas Bellinger int off = 0; 47cbf031f4SNicholas Bellinger 48cbf031f4SNicholas Bellinger buf[off++] = (0x6 << 4); 49cbf031f4SNicholas Bellinger buf[off++] = 0x01; 50cbf031f4SNicholas Bellinger buf[off++] = 0x40; 51cbf031f4SNicholas Bellinger buf[off] = (0x5 << 4); 52cbf031f4SNicholas Bellinger 53cbf031f4SNicholas Bellinger spc_parse_naa_6h_vendor_specific(dev, &buf[off]); 54cbf031f4SNicholas Bellinger return 0; 55cbf031f4SNicholas Bellinger } 56cbf031f4SNicholas Bellinger 57cbf031f4SNicholas Bellinger static int target_xcopy_locate_se_dev_e4(struct se_cmd *se_cmd, struct xcopy_op *xop, 58cbf031f4SNicholas Bellinger bool src) 59cbf031f4SNicholas Bellinger { 60cbf031f4SNicholas Bellinger struct se_device *se_dev; 61cbf031f4SNicholas Bellinger struct configfs_subsystem *subsys = target_core_subsystem[0]; 62cbf031f4SNicholas Bellinger unsigned char tmp_dev_wwn[XCOPY_NAA_IEEE_REGEX_LEN], *dev_wwn; 63cbf031f4SNicholas Bellinger int rc; 64cbf031f4SNicholas Bellinger 650bcc297eSChristophe Vu-Brugier if (src) 66cbf031f4SNicholas Bellinger dev_wwn = &xop->dst_tid_wwn[0]; 67cbf031f4SNicholas Bellinger else 68cbf031f4SNicholas Bellinger dev_wwn = &xop->src_tid_wwn[0]; 69cbf031f4SNicholas Bellinger 70cbf031f4SNicholas Bellinger mutex_lock(&g_device_mutex); 71cbf031f4SNicholas Bellinger list_for_each_entry(se_dev, &g_device_list, g_dev_node) { 72cbf031f4SNicholas Bellinger 73acb3f260SNicholas Bellinger if (!se_dev->dev_attrib.emulate_3pc) 74acb3f260SNicholas Bellinger continue; 75acb3f260SNicholas Bellinger 76cbf031f4SNicholas Bellinger memset(&tmp_dev_wwn[0], 0, XCOPY_NAA_IEEE_REGEX_LEN); 77cbf031f4SNicholas Bellinger target_xcopy_gen_naa_ieee(se_dev, &tmp_dev_wwn[0]); 78cbf031f4SNicholas Bellinger 79cbf031f4SNicholas Bellinger rc = memcmp(&tmp_dev_wwn[0], dev_wwn, XCOPY_NAA_IEEE_REGEX_LEN); 80cbf031f4SNicholas Bellinger if (rc != 0) 81cbf031f4SNicholas Bellinger continue; 82cbf031f4SNicholas Bellinger 830bcc297eSChristophe Vu-Brugier if (src) { 84cbf031f4SNicholas Bellinger xop->dst_dev = se_dev; 85cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: Setting xop->dst_dev: %p from located" 86cbf031f4SNicholas Bellinger " se_dev\n", xop->dst_dev); 87cbf031f4SNicholas Bellinger } else { 88cbf031f4SNicholas Bellinger xop->src_dev = se_dev; 89cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: Setting xop->src_dev: %p from located" 90cbf031f4SNicholas Bellinger " se_dev\n", xop->src_dev); 91cbf031f4SNicholas Bellinger } 92cbf031f4SNicholas Bellinger 93cbf031f4SNicholas Bellinger rc = configfs_depend_item(subsys, 94cbf031f4SNicholas Bellinger &se_dev->dev_group.cg_item); 95cbf031f4SNicholas Bellinger if (rc != 0) { 96cbf031f4SNicholas Bellinger pr_err("configfs_depend_item attempt failed:" 97cbf031f4SNicholas Bellinger " %d for se_dev: %p\n", rc, se_dev); 98cbf031f4SNicholas Bellinger mutex_unlock(&g_device_mutex); 99cbf031f4SNicholas Bellinger return rc; 100cbf031f4SNicholas Bellinger } 101cbf031f4SNicholas Bellinger 102cbf031f4SNicholas Bellinger pr_debug("Called configfs_depend_item for subsys: %p se_dev: %p" 103cbf031f4SNicholas Bellinger " se_dev->se_dev_group: %p\n", subsys, se_dev, 104cbf031f4SNicholas Bellinger &se_dev->dev_group); 105cbf031f4SNicholas Bellinger 106cbf031f4SNicholas Bellinger mutex_unlock(&g_device_mutex); 107cbf031f4SNicholas Bellinger return 0; 108cbf031f4SNicholas Bellinger } 109cbf031f4SNicholas Bellinger mutex_unlock(&g_device_mutex); 110cbf031f4SNicholas Bellinger 111cbf031f4SNicholas Bellinger pr_err("Unable to locate 0xe4 descriptor for EXTENDED_COPY\n"); 112cbf031f4SNicholas Bellinger return -EINVAL; 113cbf031f4SNicholas Bellinger } 114cbf031f4SNicholas Bellinger 115cbf031f4SNicholas Bellinger static int target_xcopy_parse_tiddesc_e4(struct se_cmd *se_cmd, struct xcopy_op *xop, 116cbf031f4SNicholas Bellinger unsigned char *p, bool src) 117cbf031f4SNicholas Bellinger { 118cbf031f4SNicholas Bellinger unsigned char *desc = p; 119cbf031f4SNicholas Bellinger unsigned short ript; 120cbf031f4SNicholas Bellinger u8 desig_len; 121cbf031f4SNicholas Bellinger /* 122cbf031f4SNicholas Bellinger * Extract RELATIVE INITIATOR PORT IDENTIFIER 123cbf031f4SNicholas Bellinger */ 124cbf031f4SNicholas Bellinger ript = get_unaligned_be16(&desc[2]); 125cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: RELATIVE INITIATOR PORT IDENTIFIER: %hu\n", ript); 126cbf031f4SNicholas Bellinger /* 127cbf031f4SNicholas Bellinger * Check for supported code set, association, and designator type 128cbf031f4SNicholas Bellinger */ 129cbf031f4SNicholas Bellinger if ((desc[4] & 0x0f) != 0x1) { 130cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: code set of non binary type not supported\n"); 131cbf031f4SNicholas Bellinger return -EINVAL; 132cbf031f4SNicholas Bellinger } 133cbf031f4SNicholas Bellinger if ((desc[5] & 0x30) != 0x00) { 134cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: association other than LUN not supported\n"); 135cbf031f4SNicholas Bellinger return -EINVAL; 136cbf031f4SNicholas Bellinger } 137cbf031f4SNicholas Bellinger if ((desc[5] & 0x0f) != 0x3) { 138cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: designator type unsupported: 0x%02x\n", 139cbf031f4SNicholas Bellinger (desc[5] & 0x0f)); 140cbf031f4SNicholas Bellinger return -EINVAL; 141cbf031f4SNicholas Bellinger } 142cbf031f4SNicholas Bellinger /* 143cbf031f4SNicholas Bellinger * Check for matching 16 byte length for NAA IEEE Registered Extended 144cbf031f4SNicholas Bellinger * Assigned designator 145cbf031f4SNicholas Bellinger */ 146cbf031f4SNicholas Bellinger desig_len = desc[7]; 147cbf031f4SNicholas Bellinger if (desig_len != 16) { 148cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: invalid desig_len: %d\n", (int)desig_len); 149cbf031f4SNicholas Bellinger return -EINVAL; 150cbf031f4SNicholas Bellinger } 151cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: desig_len: %d\n", (int)desig_len); 152cbf031f4SNicholas Bellinger /* 153cbf031f4SNicholas Bellinger * Check for NAA IEEE Registered Extended Assigned header.. 154cbf031f4SNicholas Bellinger */ 155cbf031f4SNicholas Bellinger if ((desc[8] & 0xf0) != 0x60) { 156cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: Unsupported DESIGNATOR TYPE: 0x%02x\n", 157cbf031f4SNicholas Bellinger (desc[8] & 0xf0)); 158cbf031f4SNicholas Bellinger return -EINVAL; 159cbf031f4SNicholas Bellinger } 160cbf031f4SNicholas Bellinger 1610bcc297eSChristophe Vu-Brugier if (src) { 162cbf031f4SNicholas Bellinger memcpy(&xop->src_tid_wwn[0], &desc[8], XCOPY_NAA_IEEE_REGEX_LEN); 163cbf031f4SNicholas Bellinger /* 164cbf031f4SNicholas Bellinger * Determine if the source designator matches the local device 165cbf031f4SNicholas Bellinger */ 166cbf031f4SNicholas Bellinger if (!memcmp(&xop->local_dev_wwn[0], &xop->src_tid_wwn[0], 167cbf031f4SNicholas Bellinger XCOPY_NAA_IEEE_REGEX_LEN)) { 168cbf031f4SNicholas Bellinger xop->op_origin = XCOL_SOURCE_RECV_OP; 169cbf031f4SNicholas Bellinger xop->src_dev = se_cmd->se_dev; 170cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: Set xop->src_dev %p from source" 171cbf031f4SNicholas Bellinger " received xop\n", xop->src_dev); 172cbf031f4SNicholas Bellinger } 173cbf031f4SNicholas Bellinger } else { 174cbf031f4SNicholas Bellinger memcpy(&xop->dst_tid_wwn[0], &desc[8], XCOPY_NAA_IEEE_REGEX_LEN); 175cbf031f4SNicholas Bellinger /* 176cbf031f4SNicholas Bellinger * Determine if the destination designator matches the local device 177cbf031f4SNicholas Bellinger */ 178cbf031f4SNicholas Bellinger if (!memcmp(&xop->local_dev_wwn[0], &xop->dst_tid_wwn[0], 179cbf031f4SNicholas Bellinger XCOPY_NAA_IEEE_REGEX_LEN)) { 180cbf031f4SNicholas Bellinger xop->op_origin = XCOL_DEST_RECV_OP; 181cbf031f4SNicholas Bellinger xop->dst_dev = se_cmd->se_dev; 182cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: Set xop->dst_dev: %p from destination" 183cbf031f4SNicholas Bellinger " received xop\n", xop->dst_dev); 184cbf031f4SNicholas Bellinger } 185cbf031f4SNicholas Bellinger } 186cbf031f4SNicholas Bellinger 187cbf031f4SNicholas Bellinger return 0; 188cbf031f4SNicholas Bellinger } 189cbf031f4SNicholas Bellinger 190cbf031f4SNicholas Bellinger static int target_xcopy_parse_target_descriptors(struct se_cmd *se_cmd, 191cbf031f4SNicholas Bellinger struct xcopy_op *xop, unsigned char *p, 192cbf031f4SNicholas Bellinger unsigned short tdll) 193cbf031f4SNicholas Bellinger { 194cbf031f4SNicholas Bellinger struct se_device *local_dev = se_cmd->se_dev; 195cbf031f4SNicholas Bellinger unsigned char *desc = p; 196cbf031f4SNicholas Bellinger int offset = tdll % XCOPY_TARGET_DESC_LEN, rc, ret = 0; 197cbf031f4SNicholas Bellinger unsigned short start = 0; 198cbf031f4SNicholas Bellinger bool src = true; 199cbf031f4SNicholas Bellinger 200cbf031f4SNicholas Bellinger if (offset != 0) { 201cbf031f4SNicholas Bellinger pr_err("XCOPY target descriptor list length is not" 202cbf031f4SNicholas Bellinger " multiple of %d\n", XCOPY_TARGET_DESC_LEN); 203cbf031f4SNicholas Bellinger return -EINVAL; 204cbf031f4SNicholas Bellinger } 205cbf031f4SNicholas Bellinger if (tdll > 64) { 206cbf031f4SNicholas Bellinger pr_err("XCOPY target descriptor supports a maximum" 207cbf031f4SNicholas Bellinger " two src/dest descriptors, tdll: %hu too large..\n", tdll); 208cbf031f4SNicholas Bellinger return -EINVAL; 209cbf031f4SNicholas Bellinger } 210cbf031f4SNicholas Bellinger /* 211cbf031f4SNicholas Bellinger * Generate an IEEE Registered Extended designator based upon the 212cbf031f4SNicholas Bellinger * se_device the XCOPY was received upon.. 213cbf031f4SNicholas Bellinger */ 214cbf031f4SNicholas Bellinger memset(&xop->local_dev_wwn[0], 0, XCOPY_NAA_IEEE_REGEX_LEN); 215cbf031f4SNicholas Bellinger target_xcopy_gen_naa_ieee(local_dev, &xop->local_dev_wwn[0]); 216cbf031f4SNicholas Bellinger 217cbf031f4SNicholas Bellinger while (start < tdll) { 218cbf031f4SNicholas Bellinger /* 219cbf031f4SNicholas Bellinger * Check target descriptor identification with 0xE4 type with 220cbf031f4SNicholas Bellinger * use VPD 0x83 WWPN matching .. 221cbf031f4SNicholas Bellinger */ 222cbf031f4SNicholas Bellinger switch (desc[0]) { 223cbf031f4SNicholas Bellinger case 0xe4: 224cbf031f4SNicholas Bellinger rc = target_xcopy_parse_tiddesc_e4(se_cmd, xop, 225cbf031f4SNicholas Bellinger &desc[0], src); 226cbf031f4SNicholas Bellinger if (rc != 0) 227cbf031f4SNicholas Bellinger goto out; 228cbf031f4SNicholas Bellinger /* 229cbf031f4SNicholas Bellinger * Assume target descriptors are in source -> destination order.. 230cbf031f4SNicholas Bellinger */ 2310bcc297eSChristophe Vu-Brugier if (src) 232cbf031f4SNicholas Bellinger src = false; 233cbf031f4SNicholas Bellinger else 234cbf031f4SNicholas Bellinger src = true; 235cbf031f4SNicholas Bellinger start += XCOPY_TARGET_DESC_LEN; 236cbf031f4SNicholas Bellinger desc += XCOPY_TARGET_DESC_LEN; 237cbf031f4SNicholas Bellinger ret++; 238cbf031f4SNicholas Bellinger break; 239cbf031f4SNicholas Bellinger default: 240cbf031f4SNicholas Bellinger pr_err("XCOPY unsupported descriptor type code:" 241cbf031f4SNicholas Bellinger " 0x%02x\n", desc[0]); 242cbf031f4SNicholas Bellinger goto out; 243cbf031f4SNicholas Bellinger } 244cbf031f4SNicholas Bellinger } 245cbf031f4SNicholas Bellinger 246cbf031f4SNicholas Bellinger if (xop->op_origin == XCOL_SOURCE_RECV_OP) 247cbf031f4SNicholas Bellinger rc = target_xcopy_locate_se_dev_e4(se_cmd, xop, true); 248cbf031f4SNicholas Bellinger else 249cbf031f4SNicholas Bellinger rc = target_xcopy_locate_se_dev_e4(se_cmd, xop, false); 250cbf031f4SNicholas Bellinger 251cbf031f4SNicholas Bellinger if (rc < 0) 252cbf031f4SNicholas Bellinger goto out; 253cbf031f4SNicholas Bellinger 254cbf031f4SNicholas Bellinger pr_debug("XCOPY TGT desc: Source dev: %p NAA IEEE WWN: 0x%16phN\n", 255cbf031f4SNicholas Bellinger xop->src_dev, &xop->src_tid_wwn[0]); 256cbf031f4SNicholas Bellinger pr_debug("XCOPY TGT desc: Dest dev: %p NAA IEEE WWN: 0x%16phN\n", 257cbf031f4SNicholas Bellinger xop->dst_dev, &xop->dst_tid_wwn[0]); 258cbf031f4SNicholas Bellinger 259cbf031f4SNicholas Bellinger return ret; 260cbf031f4SNicholas Bellinger 261cbf031f4SNicholas Bellinger out: 262cbf031f4SNicholas Bellinger return -EINVAL; 263cbf031f4SNicholas Bellinger } 264cbf031f4SNicholas Bellinger 265cbf031f4SNicholas Bellinger static int target_xcopy_parse_segdesc_02(struct se_cmd *se_cmd, struct xcopy_op *xop, 266cbf031f4SNicholas Bellinger unsigned char *p) 267cbf031f4SNicholas Bellinger { 268cbf031f4SNicholas Bellinger unsigned char *desc = p; 269cbf031f4SNicholas Bellinger int dc = (desc[1] & 0x02); 270cbf031f4SNicholas Bellinger unsigned short desc_len; 271cbf031f4SNicholas Bellinger 272cbf031f4SNicholas Bellinger desc_len = get_unaligned_be16(&desc[2]); 273cbf031f4SNicholas Bellinger if (desc_len != 0x18) { 274cbf031f4SNicholas Bellinger pr_err("XCOPY segment desc 0x02: Illegal desc_len:" 275cbf031f4SNicholas Bellinger " %hu\n", desc_len); 276cbf031f4SNicholas Bellinger return -EINVAL; 277cbf031f4SNicholas Bellinger } 278cbf031f4SNicholas Bellinger 279cbf031f4SNicholas Bellinger xop->stdi = get_unaligned_be16(&desc[4]); 280cbf031f4SNicholas Bellinger xop->dtdi = get_unaligned_be16(&desc[6]); 281cbf031f4SNicholas Bellinger pr_debug("XCOPY seg desc 0x02: desc_len: %hu stdi: %hu dtdi: %hu, DC: %d\n", 282cbf031f4SNicholas Bellinger desc_len, xop->stdi, xop->dtdi, dc); 283cbf031f4SNicholas Bellinger 284cbf031f4SNicholas Bellinger xop->nolb = get_unaligned_be16(&desc[10]); 285cbf031f4SNicholas Bellinger xop->src_lba = get_unaligned_be64(&desc[12]); 286cbf031f4SNicholas Bellinger xop->dst_lba = get_unaligned_be64(&desc[20]); 287cbf031f4SNicholas Bellinger pr_debug("XCOPY seg desc 0x02: nolb: %hu src_lba: %llu dst_lba: %llu\n", 288cbf031f4SNicholas Bellinger xop->nolb, (unsigned long long)xop->src_lba, 289cbf031f4SNicholas Bellinger (unsigned long long)xop->dst_lba); 290cbf031f4SNicholas Bellinger 291cbf031f4SNicholas Bellinger if (dc != 0) { 2923e9e01deSNicholas Bellinger xop->dbl = (desc[29] & 0xff) << 16; 2933e9e01deSNicholas Bellinger xop->dbl |= (desc[30] & 0xff) << 8; 294cbf031f4SNicholas Bellinger xop->dbl |= desc[31] & 0xff; 295cbf031f4SNicholas Bellinger 296cbf031f4SNicholas Bellinger pr_debug("XCOPY seg desc 0x02: DC=1 w/ dbl: %u\n", xop->dbl); 297cbf031f4SNicholas Bellinger } 298cbf031f4SNicholas Bellinger return 0; 299cbf031f4SNicholas Bellinger } 300cbf031f4SNicholas Bellinger 301cbf031f4SNicholas Bellinger static int target_xcopy_parse_segment_descriptors(struct se_cmd *se_cmd, 302cbf031f4SNicholas Bellinger struct xcopy_op *xop, unsigned char *p, 303cbf031f4SNicholas Bellinger unsigned int sdll) 304cbf031f4SNicholas Bellinger { 305cbf031f4SNicholas Bellinger unsigned char *desc = p; 306cbf031f4SNicholas Bellinger unsigned int start = 0; 307cbf031f4SNicholas Bellinger int offset = sdll % XCOPY_SEGMENT_DESC_LEN, rc, ret = 0; 308cbf031f4SNicholas Bellinger 309cbf031f4SNicholas Bellinger if (offset != 0) { 310cbf031f4SNicholas Bellinger pr_err("XCOPY segment descriptor list length is not" 311cbf031f4SNicholas Bellinger " multiple of %d\n", XCOPY_SEGMENT_DESC_LEN); 312cbf031f4SNicholas Bellinger return -EINVAL; 313cbf031f4SNicholas Bellinger } 314cbf031f4SNicholas Bellinger 315cbf031f4SNicholas Bellinger while (start < sdll) { 316cbf031f4SNicholas Bellinger /* 317cbf031f4SNicholas Bellinger * Check segment descriptor type code for block -> block 318cbf031f4SNicholas Bellinger */ 319cbf031f4SNicholas Bellinger switch (desc[0]) { 320cbf031f4SNicholas Bellinger case 0x02: 321cbf031f4SNicholas Bellinger rc = target_xcopy_parse_segdesc_02(se_cmd, xop, desc); 322cbf031f4SNicholas Bellinger if (rc < 0) 323cbf031f4SNicholas Bellinger goto out; 324cbf031f4SNicholas Bellinger 325cbf031f4SNicholas Bellinger ret++; 326cbf031f4SNicholas Bellinger start += XCOPY_SEGMENT_DESC_LEN; 327cbf031f4SNicholas Bellinger desc += XCOPY_SEGMENT_DESC_LEN; 328cbf031f4SNicholas Bellinger break; 329cbf031f4SNicholas Bellinger default: 3306774def6SMasanari Iida pr_err("XCOPY unsupported segment descriptor" 331cbf031f4SNicholas Bellinger "type: 0x%02x\n", desc[0]); 332cbf031f4SNicholas Bellinger goto out; 333cbf031f4SNicholas Bellinger } 334cbf031f4SNicholas Bellinger } 335cbf031f4SNicholas Bellinger 336cbf031f4SNicholas Bellinger return ret; 337cbf031f4SNicholas Bellinger 338cbf031f4SNicholas Bellinger out: 339cbf031f4SNicholas Bellinger return -EINVAL; 340cbf031f4SNicholas Bellinger } 341cbf031f4SNicholas Bellinger 342cbf031f4SNicholas Bellinger /* 343cbf031f4SNicholas Bellinger * Start xcopy_pt ops 344cbf031f4SNicholas Bellinger */ 345cbf031f4SNicholas Bellinger 346cbf031f4SNicholas Bellinger struct xcopy_pt_cmd { 347cbf031f4SNicholas Bellinger bool remote_port; 348cbf031f4SNicholas Bellinger struct se_cmd se_cmd; 349cbf031f4SNicholas Bellinger struct xcopy_op *xcopy_op; 350cbf031f4SNicholas Bellinger struct completion xpt_passthrough_sem; 351366bda19SNicholas Bellinger unsigned char sense_buffer[TRANSPORT_SENSE_BUFFER]; 352cbf031f4SNicholas Bellinger }; 353cbf031f4SNicholas Bellinger 354cbf031f4SNicholas Bellinger static struct se_port xcopy_pt_port; 355cbf031f4SNicholas Bellinger static struct se_portal_group xcopy_pt_tpg; 356cbf031f4SNicholas Bellinger static struct se_session xcopy_pt_sess; 357cbf031f4SNicholas Bellinger static struct se_node_acl xcopy_pt_nacl; 358cbf031f4SNicholas Bellinger 359cbf031f4SNicholas Bellinger static char *xcopy_pt_get_fabric_name(void) 360cbf031f4SNicholas Bellinger { 361cbf031f4SNicholas Bellinger return "xcopy-pt"; 362cbf031f4SNicholas Bellinger } 363cbf031f4SNicholas Bellinger 364cbf031f4SNicholas Bellinger static u32 xcopy_pt_get_tag(struct se_cmd *se_cmd) 365cbf031f4SNicholas Bellinger { 366cbf031f4SNicholas Bellinger return 0; 367cbf031f4SNicholas Bellinger } 368cbf031f4SNicholas Bellinger 369cbf031f4SNicholas Bellinger static int xcopy_pt_get_cmd_state(struct se_cmd *se_cmd) 370cbf031f4SNicholas Bellinger { 371cbf031f4SNicholas Bellinger return 0; 372cbf031f4SNicholas Bellinger } 373cbf031f4SNicholas Bellinger 374cbf031f4SNicholas Bellinger static void xcopy_pt_undepend_remotedev(struct xcopy_op *xop) 375cbf031f4SNicholas Bellinger { 376cbf031f4SNicholas Bellinger struct configfs_subsystem *subsys = target_core_subsystem[0]; 377cbf031f4SNicholas Bellinger struct se_device *remote_dev; 378cbf031f4SNicholas Bellinger 379cbf031f4SNicholas Bellinger if (xop->op_origin == XCOL_SOURCE_RECV_OP) 380cbf031f4SNicholas Bellinger remote_dev = xop->dst_dev; 381cbf031f4SNicholas Bellinger else 382cbf031f4SNicholas Bellinger remote_dev = xop->src_dev; 383cbf031f4SNicholas Bellinger 384cbf031f4SNicholas Bellinger pr_debug("Calling configfs_undepend_item for subsys: %p" 385cbf031f4SNicholas Bellinger " remote_dev: %p remote_dev->dev_group: %p\n", 386cbf031f4SNicholas Bellinger subsys, remote_dev, &remote_dev->dev_group.cg_item); 387cbf031f4SNicholas Bellinger 388cbf031f4SNicholas Bellinger configfs_undepend_item(subsys, &remote_dev->dev_group.cg_item); 389cbf031f4SNicholas Bellinger } 390cbf031f4SNicholas Bellinger 391cbf031f4SNicholas Bellinger static void xcopy_pt_release_cmd(struct se_cmd *se_cmd) 392cbf031f4SNicholas Bellinger { 393cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd = container_of(se_cmd, 394cbf031f4SNicholas Bellinger struct xcopy_pt_cmd, se_cmd); 395cbf031f4SNicholas Bellinger 396cbf031f4SNicholas Bellinger kfree(xpt_cmd); 397cbf031f4SNicholas Bellinger } 398cbf031f4SNicholas Bellinger 399cbf031f4SNicholas Bellinger static int xcopy_pt_check_stop_free(struct se_cmd *se_cmd) 400cbf031f4SNicholas Bellinger { 401cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd = container_of(se_cmd, 402cbf031f4SNicholas Bellinger struct xcopy_pt_cmd, se_cmd); 403cbf031f4SNicholas Bellinger 404cbf031f4SNicholas Bellinger complete(&xpt_cmd->xpt_passthrough_sem); 405cbf031f4SNicholas Bellinger return 0; 406cbf031f4SNicholas Bellinger } 407cbf031f4SNicholas Bellinger 408cbf031f4SNicholas Bellinger static int xcopy_pt_write_pending(struct se_cmd *se_cmd) 409cbf031f4SNicholas Bellinger { 410cbf031f4SNicholas Bellinger return 0; 411cbf031f4SNicholas Bellinger } 412cbf031f4SNicholas Bellinger 413cbf031f4SNicholas Bellinger static int xcopy_pt_write_pending_status(struct se_cmd *se_cmd) 414cbf031f4SNicholas Bellinger { 415cbf031f4SNicholas Bellinger return 0; 416cbf031f4SNicholas Bellinger } 417cbf031f4SNicholas Bellinger 418cbf031f4SNicholas Bellinger static int xcopy_pt_queue_data_in(struct se_cmd *se_cmd) 419cbf031f4SNicholas Bellinger { 420cbf031f4SNicholas Bellinger return 0; 421cbf031f4SNicholas Bellinger } 422cbf031f4SNicholas Bellinger 423cbf031f4SNicholas Bellinger static int xcopy_pt_queue_status(struct se_cmd *se_cmd) 424cbf031f4SNicholas Bellinger { 425cbf031f4SNicholas Bellinger return 0; 426cbf031f4SNicholas Bellinger } 427cbf031f4SNicholas Bellinger 428cbf031f4SNicholas Bellinger static struct target_core_fabric_ops xcopy_pt_tfo = { 429cbf031f4SNicholas Bellinger .get_fabric_name = xcopy_pt_get_fabric_name, 430cbf031f4SNicholas Bellinger .get_task_tag = xcopy_pt_get_tag, 431cbf031f4SNicholas Bellinger .get_cmd_state = xcopy_pt_get_cmd_state, 432cbf031f4SNicholas Bellinger .release_cmd = xcopy_pt_release_cmd, 433cbf031f4SNicholas Bellinger .check_stop_free = xcopy_pt_check_stop_free, 434cbf031f4SNicholas Bellinger .write_pending = xcopy_pt_write_pending, 435cbf031f4SNicholas Bellinger .write_pending_status = xcopy_pt_write_pending_status, 436cbf031f4SNicholas Bellinger .queue_data_in = xcopy_pt_queue_data_in, 437cbf031f4SNicholas Bellinger .queue_status = xcopy_pt_queue_status, 438cbf031f4SNicholas Bellinger }; 439cbf031f4SNicholas Bellinger 440cbf031f4SNicholas Bellinger /* 441cbf031f4SNicholas Bellinger * End xcopy_pt_ops 442cbf031f4SNicholas Bellinger */ 443cbf031f4SNicholas Bellinger 444cbf031f4SNicholas Bellinger int target_xcopy_setup_pt(void) 445cbf031f4SNicholas Bellinger { 446cbf031f4SNicholas Bellinger xcopy_wq = alloc_workqueue("xcopy_wq", WQ_MEM_RECLAIM, 0); 447cbf031f4SNicholas Bellinger if (!xcopy_wq) { 448cbf031f4SNicholas Bellinger pr_err("Unable to allocate xcopy_wq\n"); 449cbf031f4SNicholas Bellinger return -ENOMEM; 450cbf031f4SNicholas Bellinger } 451cbf031f4SNicholas Bellinger 452cbf031f4SNicholas Bellinger memset(&xcopy_pt_port, 0, sizeof(struct se_port)); 453cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_port.sep_alua_list); 454cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_port.sep_list); 455cbf031f4SNicholas Bellinger mutex_init(&xcopy_pt_port.sep_tg_pt_md_mutex); 456cbf031f4SNicholas Bellinger 457cbf031f4SNicholas Bellinger memset(&xcopy_pt_tpg, 0, sizeof(struct se_portal_group)); 458cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_tpg.se_tpg_node); 459cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_tpg.acl_node_list); 460cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_tpg.tpg_sess_list); 461cbf031f4SNicholas Bellinger 462cbf031f4SNicholas Bellinger xcopy_pt_port.sep_tpg = &xcopy_pt_tpg; 463cbf031f4SNicholas Bellinger xcopy_pt_tpg.se_tpg_tfo = &xcopy_pt_tfo; 464cbf031f4SNicholas Bellinger 465cbf031f4SNicholas Bellinger memset(&xcopy_pt_nacl, 0, sizeof(struct se_node_acl)); 466cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_nacl.acl_list); 467cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_nacl.acl_sess_list); 468cbf031f4SNicholas Bellinger memset(&xcopy_pt_sess, 0, sizeof(struct se_session)); 469cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_sess.sess_list); 470cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_sess.sess_acl_list); 471cbf031f4SNicholas Bellinger 472cbf031f4SNicholas Bellinger xcopy_pt_nacl.se_tpg = &xcopy_pt_tpg; 473cbf031f4SNicholas Bellinger xcopy_pt_nacl.nacl_sess = &xcopy_pt_sess; 474cbf031f4SNicholas Bellinger 475cbf031f4SNicholas Bellinger xcopy_pt_sess.se_tpg = &xcopy_pt_tpg; 476cbf031f4SNicholas Bellinger xcopy_pt_sess.se_node_acl = &xcopy_pt_nacl; 477cbf031f4SNicholas Bellinger 478cbf031f4SNicholas Bellinger return 0; 479cbf031f4SNicholas Bellinger } 480cbf031f4SNicholas Bellinger 481cbf031f4SNicholas Bellinger void target_xcopy_release_pt(void) 482cbf031f4SNicholas Bellinger { 483cbf031f4SNicholas Bellinger if (xcopy_wq) 484cbf031f4SNicholas Bellinger destroy_workqueue(xcopy_wq); 485cbf031f4SNicholas Bellinger } 486cbf031f4SNicholas Bellinger 487cbf031f4SNicholas Bellinger static void target_xcopy_setup_pt_port( 488cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd, 489cbf031f4SNicholas Bellinger struct xcopy_op *xop, 490cbf031f4SNicholas Bellinger bool remote_port) 491cbf031f4SNicholas Bellinger { 492cbf031f4SNicholas Bellinger struct se_cmd *ec_cmd = xop->xop_se_cmd; 493cbf031f4SNicholas Bellinger struct se_cmd *pt_cmd = &xpt_cmd->se_cmd; 494cbf031f4SNicholas Bellinger 495cbf031f4SNicholas Bellinger if (xop->op_origin == XCOL_SOURCE_RECV_OP) { 496cbf031f4SNicholas Bellinger /* 497cbf031f4SNicholas Bellinger * Honor destination port reservations for X-COPY PUSH emulation 498cbf031f4SNicholas Bellinger * when CDB is received on local source port, and READs blocks to 499cbf031f4SNicholas Bellinger * WRITE on remote destination port. 500cbf031f4SNicholas Bellinger */ 501cbf031f4SNicholas Bellinger if (remote_port) { 502cbf031f4SNicholas Bellinger xpt_cmd->remote_port = remote_port; 503cbf031f4SNicholas Bellinger pt_cmd->se_lun->lun_sep = &xcopy_pt_port; 504cbf031f4SNicholas Bellinger pr_debug("Setup emulated remote DEST xcopy_pt_port: %p to" 505cbf031f4SNicholas Bellinger " cmd->se_lun->lun_sep for X-COPY data PUSH\n", 506cbf031f4SNicholas Bellinger pt_cmd->se_lun->lun_sep); 507cbf031f4SNicholas Bellinger } else { 508cbf031f4SNicholas Bellinger pt_cmd->se_lun = ec_cmd->se_lun; 509cbf031f4SNicholas Bellinger pt_cmd->se_dev = ec_cmd->se_dev; 510cbf031f4SNicholas Bellinger 511cbf031f4SNicholas Bellinger pr_debug("Honoring local SRC port from ec_cmd->se_dev:" 512cbf031f4SNicholas Bellinger " %p\n", pt_cmd->se_dev); 513cbf031f4SNicholas Bellinger pt_cmd->se_lun = ec_cmd->se_lun; 514cbf031f4SNicholas Bellinger pr_debug("Honoring local SRC port from ec_cmd->se_lun: %p\n", 515cbf031f4SNicholas Bellinger pt_cmd->se_lun); 516cbf031f4SNicholas Bellinger } 517cbf031f4SNicholas Bellinger } else { 518cbf031f4SNicholas Bellinger /* 519cbf031f4SNicholas Bellinger * Honor source port reservation for X-COPY PULL emulation 520cbf031f4SNicholas Bellinger * when CDB is received on local desintation port, and READs 521cbf031f4SNicholas Bellinger * blocks from the remote source port to WRITE on local 522cbf031f4SNicholas Bellinger * destination port. 523cbf031f4SNicholas Bellinger */ 524cbf031f4SNicholas Bellinger if (remote_port) { 525cbf031f4SNicholas Bellinger xpt_cmd->remote_port = remote_port; 526cbf031f4SNicholas Bellinger pt_cmd->se_lun->lun_sep = &xcopy_pt_port; 527cbf031f4SNicholas Bellinger pr_debug("Setup emulated remote SRC xcopy_pt_port: %p to" 528cbf031f4SNicholas Bellinger " cmd->se_lun->lun_sep for X-COPY data PULL\n", 529cbf031f4SNicholas Bellinger pt_cmd->se_lun->lun_sep); 530cbf031f4SNicholas Bellinger } else { 531cbf031f4SNicholas Bellinger pt_cmd->se_lun = ec_cmd->se_lun; 532cbf031f4SNicholas Bellinger pt_cmd->se_dev = ec_cmd->se_dev; 533cbf031f4SNicholas Bellinger 534cbf031f4SNicholas Bellinger pr_debug("Honoring local DST port from ec_cmd->se_dev:" 535cbf031f4SNicholas Bellinger " %p\n", pt_cmd->se_dev); 536cbf031f4SNicholas Bellinger pt_cmd->se_lun = ec_cmd->se_lun; 537cbf031f4SNicholas Bellinger pr_debug("Honoring local DST port from ec_cmd->se_lun: %p\n", 538cbf031f4SNicholas Bellinger pt_cmd->se_lun); 539cbf031f4SNicholas Bellinger } 540cbf031f4SNicholas Bellinger } 541cbf031f4SNicholas Bellinger } 542cbf031f4SNicholas Bellinger 543cbf031f4SNicholas Bellinger static int target_xcopy_init_pt_lun( 544cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd, 545cbf031f4SNicholas Bellinger struct xcopy_op *xop, 546cbf031f4SNicholas Bellinger struct se_device *se_dev, 547cbf031f4SNicholas Bellinger struct se_cmd *pt_cmd, 548cbf031f4SNicholas Bellinger bool remote_port) 549cbf031f4SNicholas Bellinger { 550cbf031f4SNicholas Bellinger /* 551cbf031f4SNicholas Bellinger * Don't allocate + init an pt_cmd->se_lun if honoring local port for 552cbf031f4SNicholas Bellinger * reservations. The pt_cmd->se_lun pointer will be setup from within 553cbf031f4SNicholas Bellinger * target_xcopy_setup_pt_port() 554cbf031f4SNicholas Bellinger */ 5550bcc297eSChristophe Vu-Brugier if (!remote_port) { 556cbf031f4SNicholas Bellinger pt_cmd->se_cmd_flags |= SCF_SE_LUN_CMD | SCF_CMD_XCOPY_PASSTHROUGH; 557cbf031f4SNicholas Bellinger return 0; 558cbf031f4SNicholas Bellinger } 559cbf031f4SNicholas Bellinger 5604863e525SNicholas Bellinger pt_cmd->se_lun = &se_dev->xcopy_lun; 561cbf031f4SNicholas Bellinger pt_cmd->se_dev = se_dev; 562cbf031f4SNicholas Bellinger 563cbf031f4SNicholas Bellinger pr_debug("Setup emulated se_dev: %p from se_dev\n", pt_cmd->se_dev); 564cbf031f4SNicholas Bellinger pt_cmd->se_cmd_flags |= SCF_SE_LUN_CMD | SCF_CMD_XCOPY_PASSTHROUGH; 565cbf031f4SNicholas Bellinger 566cbf031f4SNicholas Bellinger pr_debug("Setup emulated se_dev: %p to pt_cmd->se_lun->lun_se_dev\n", 567cbf031f4SNicholas Bellinger pt_cmd->se_lun->lun_se_dev); 568cbf031f4SNicholas Bellinger 569cbf031f4SNicholas Bellinger return 0; 570cbf031f4SNicholas Bellinger } 571cbf031f4SNicholas Bellinger 572cbf031f4SNicholas Bellinger static int target_xcopy_setup_pt_cmd( 573cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd, 574cbf031f4SNicholas Bellinger struct xcopy_op *xop, 575cbf031f4SNicholas Bellinger struct se_device *se_dev, 576cbf031f4SNicholas Bellinger unsigned char *cdb, 577cbf031f4SNicholas Bellinger bool remote_port, 578cbf031f4SNicholas Bellinger bool alloc_mem) 579cbf031f4SNicholas Bellinger { 580cbf031f4SNicholas Bellinger struct se_cmd *cmd = &xpt_cmd->se_cmd; 581cbf031f4SNicholas Bellinger sense_reason_t sense_rc; 582cbf031f4SNicholas Bellinger int ret = 0, rc; 583cbf031f4SNicholas Bellinger /* 584cbf031f4SNicholas Bellinger * Setup LUN+port to honor reservations based upon xop->op_origin for 585cbf031f4SNicholas Bellinger * X-COPY PUSH or X-COPY PULL based upon where the CDB was received. 586cbf031f4SNicholas Bellinger */ 587cbf031f4SNicholas Bellinger rc = target_xcopy_init_pt_lun(xpt_cmd, xop, se_dev, cmd, remote_port); 588cbf031f4SNicholas Bellinger if (rc < 0) { 589cbf031f4SNicholas Bellinger ret = rc; 590cbf031f4SNicholas Bellinger goto out; 591cbf031f4SNicholas Bellinger } 592cbf031f4SNicholas Bellinger xpt_cmd->xcopy_op = xop; 593cbf031f4SNicholas Bellinger target_xcopy_setup_pt_port(xpt_cmd, xop, remote_port); 594cbf031f4SNicholas Bellinger 595cbf031f4SNicholas Bellinger sense_rc = target_setup_cmd_from_cdb(cmd, cdb); 596cbf031f4SNicholas Bellinger if (sense_rc) { 597cbf031f4SNicholas Bellinger ret = -EINVAL; 598cbf031f4SNicholas Bellinger goto out; 599cbf031f4SNicholas Bellinger } 600cbf031f4SNicholas Bellinger 601cbf031f4SNicholas Bellinger if (alloc_mem) { 602cbf031f4SNicholas Bellinger rc = target_alloc_sgl(&cmd->t_data_sg, &cmd->t_data_nents, 603cbf031f4SNicholas Bellinger cmd->data_length, false); 604cbf031f4SNicholas Bellinger if (rc < 0) { 605cbf031f4SNicholas Bellinger ret = rc; 606cbf031f4SNicholas Bellinger goto out; 607cbf031f4SNicholas Bellinger } 608cbf031f4SNicholas Bellinger /* 609cbf031f4SNicholas Bellinger * Set this bit so that transport_free_pages() allows the 610cbf031f4SNicholas Bellinger * caller to release SGLs + physical memory allocated by 611cbf031f4SNicholas Bellinger * transport_generic_get_mem().. 612cbf031f4SNicholas Bellinger */ 613cbf031f4SNicholas Bellinger cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; 614cbf031f4SNicholas Bellinger } else { 615cbf031f4SNicholas Bellinger /* 616cbf031f4SNicholas Bellinger * Here the previously allocated SGLs for the internal READ 617cbf031f4SNicholas Bellinger * are mapped zero-copy to the internal WRITE. 618cbf031f4SNicholas Bellinger */ 619cbf031f4SNicholas Bellinger sense_rc = transport_generic_map_mem_to_cmd(cmd, 620cbf031f4SNicholas Bellinger xop->xop_data_sg, xop->xop_data_nents, 621cbf031f4SNicholas Bellinger NULL, 0); 622cbf031f4SNicholas Bellinger if (sense_rc) { 623cbf031f4SNicholas Bellinger ret = -EINVAL; 624cbf031f4SNicholas Bellinger goto out; 625cbf031f4SNicholas Bellinger } 626cbf031f4SNicholas Bellinger 627cbf031f4SNicholas Bellinger pr_debug("Setup PASSTHROUGH_NOALLOC t_data_sg: %p t_data_nents:" 628cbf031f4SNicholas Bellinger " %u\n", cmd->t_data_sg, cmd->t_data_nents); 629cbf031f4SNicholas Bellinger } 630cbf031f4SNicholas Bellinger 631cbf031f4SNicholas Bellinger return 0; 632cbf031f4SNicholas Bellinger 633cbf031f4SNicholas Bellinger out: 634cbf031f4SNicholas Bellinger return ret; 635cbf031f4SNicholas Bellinger } 636cbf031f4SNicholas Bellinger 637cbf031f4SNicholas Bellinger static int target_xcopy_issue_pt_cmd(struct xcopy_pt_cmd *xpt_cmd) 638cbf031f4SNicholas Bellinger { 639cbf031f4SNicholas Bellinger struct se_cmd *se_cmd = &xpt_cmd->se_cmd; 640cbf031f4SNicholas Bellinger sense_reason_t sense_rc; 641cbf031f4SNicholas Bellinger 642cbf031f4SNicholas Bellinger sense_rc = transport_generic_new_cmd(se_cmd); 643cbf031f4SNicholas Bellinger if (sense_rc) 644cbf031f4SNicholas Bellinger return -EINVAL; 645cbf031f4SNicholas Bellinger 646cbf031f4SNicholas Bellinger if (se_cmd->data_direction == DMA_TO_DEVICE) 647cbf031f4SNicholas Bellinger target_execute_cmd(se_cmd); 648cbf031f4SNicholas Bellinger 649cbf031f4SNicholas Bellinger wait_for_completion_interruptible(&xpt_cmd->xpt_passthrough_sem); 650cbf031f4SNicholas Bellinger 651cbf031f4SNicholas Bellinger pr_debug("target_xcopy_issue_pt_cmd(): SCSI status: 0x%02x\n", 652cbf031f4SNicholas Bellinger se_cmd->scsi_status); 6538a955d6dSNicholas Bellinger 6548a955d6dSNicholas Bellinger return (se_cmd->scsi_status) ? -EINVAL : 0; 655cbf031f4SNicholas Bellinger } 656cbf031f4SNicholas Bellinger 657cbf031f4SNicholas Bellinger static int target_xcopy_read_source( 658cbf031f4SNicholas Bellinger struct se_cmd *ec_cmd, 659cbf031f4SNicholas Bellinger struct xcopy_op *xop, 660cbf031f4SNicholas Bellinger struct se_device *src_dev, 661cbf031f4SNicholas Bellinger sector_t src_lba, 662cbf031f4SNicholas Bellinger u32 src_sectors) 663cbf031f4SNicholas Bellinger { 664cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd; 665cbf031f4SNicholas Bellinger struct se_cmd *se_cmd; 666cbf031f4SNicholas Bellinger u32 length = (src_sectors * src_dev->dev_attrib.block_size); 667cbf031f4SNicholas Bellinger int rc; 668cbf031f4SNicholas Bellinger unsigned char cdb[16]; 669cbf031f4SNicholas Bellinger bool remote_port = (xop->op_origin == XCOL_DEST_RECV_OP); 670cbf031f4SNicholas Bellinger 671cbf031f4SNicholas Bellinger xpt_cmd = kzalloc(sizeof(struct xcopy_pt_cmd), GFP_KERNEL); 672cbf031f4SNicholas Bellinger if (!xpt_cmd) { 673cbf031f4SNicholas Bellinger pr_err("Unable to allocate xcopy_pt_cmd\n"); 674cbf031f4SNicholas Bellinger return -ENOMEM; 675cbf031f4SNicholas Bellinger } 676cbf031f4SNicholas Bellinger init_completion(&xpt_cmd->xpt_passthrough_sem); 677cbf031f4SNicholas Bellinger se_cmd = &xpt_cmd->se_cmd; 678cbf031f4SNicholas Bellinger 679cbf031f4SNicholas Bellinger memset(&cdb[0], 0, 16); 680cbf031f4SNicholas Bellinger cdb[0] = READ_16; 681cbf031f4SNicholas Bellinger put_unaligned_be64(src_lba, &cdb[2]); 682cbf031f4SNicholas Bellinger put_unaligned_be32(src_sectors, &cdb[10]); 683cbf031f4SNicholas Bellinger pr_debug("XCOPY: Built READ_16: LBA: %llu Sectors: %u Length: %u\n", 684cbf031f4SNicholas Bellinger (unsigned long long)src_lba, src_sectors, length); 685cbf031f4SNicholas Bellinger 686cbf031f4SNicholas Bellinger transport_init_se_cmd(se_cmd, &xcopy_pt_tfo, NULL, length, 687366bda19SNicholas Bellinger DMA_FROM_DEVICE, 0, &xpt_cmd->sense_buffer[0]); 688cbf031f4SNicholas Bellinger xop->src_pt_cmd = xpt_cmd; 689cbf031f4SNicholas Bellinger 690cbf031f4SNicholas Bellinger rc = target_xcopy_setup_pt_cmd(xpt_cmd, xop, src_dev, &cdb[0], 691cbf031f4SNicholas Bellinger remote_port, true); 692cbf031f4SNicholas Bellinger if (rc < 0) { 693cbf031f4SNicholas Bellinger transport_generic_free_cmd(se_cmd, 0); 694cbf031f4SNicholas Bellinger return rc; 695cbf031f4SNicholas Bellinger } 696cbf031f4SNicholas Bellinger 697cbf031f4SNicholas Bellinger xop->xop_data_sg = se_cmd->t_data_sg; 698cbf031f4SNicholas Bellinger xop->xop_data_nents = se_cmd->t_data_nents; 699cbf031f4SNicholas Bellinger pr_debug("XCOPY-READ: Saved xop->xop_data_sg: %p, num: %u for READ" 700cbf031f4SNicholas Bellinger " memory\n", xop->xop_data_sg, xop->xop_data_nents); 701cbf031f4SNicholas Bellinger 702cbf031f4SNicholas Bellinger rc = target_xcopy_issue_pt_cmd(xpt_cmd); 703cbf031f4SNicholas Bellinger if (rc < 0) { 704cbf031f4SNicholas Bellinger transport_generic_free_cmd(se_cmd, 0); 705cbf031f4SNicholas Bellinger return rc; 706cbf031f4SNicholas Bellinger } 707cbf031f4SNicholas Bellinger /* 708cbf031f4SNicholas Bellinger * Clear off the allocated t_data_sg, that has been saved for 709cbf031f4SNicholas Bellinger * zero-copy WRITE submission reuse in struct xcopy_op.. 710cbf031f4SNicholas Bellinger */ 711cbf031f4SNicholas Bellinger se_cmd->t_data_sg = NULL; 712cbf031f4SNicholas Bellinger se_cmd->t_data_nents = 0; 713cbf031f4SNicholas Bellinger 714cbf031f4SNicholas Bellinger return 0; 715cbf031f4SNicholas Bellinger } 716cbf031f4SNicholas Bellinger 717cbf031f4SNicholas Bellinger static int target_xcopy_write_destination( 718cbf031f4SNicholas Bellinger struct se_cmd *ec_cmd, 719cbf031f4SNicholas Bellinger struct xcopy_op *xop, 720cbf031f4SNicholas Bellinger struct se_device *dst_dev, 721cbf031f4SNicholas Bellinger sector_t dst_lba, 722cbf031f4SNicholas Bellinger u32 dst_sectors) 723cbf031f4SNicholas Bellinger { 724cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd; 725cbf031f4SNicholas Bellinger struct se_cmd *se_cmd; 726cbf031f4SNicholas Bellinger u32 length = (dst_sectors * dst_dev->dev_attrib.block_size); 727cbf031f4SNicholas Bellinger int rc; 728cbf031f4SNicholas Bellinger unsigned char cdb[16]; 729cbf031f4SNicholas Bellinger bool remote_port = (xop->op_origin == XCOL_SOURCE_RECV_OP); 730cbf031f4SNicholas Bellinger 731cbf031f4SNicholas Bellinger xpt_cmd = kzalloc(sizeof(struct xcopy_pt_cmd), GFP_KERNEL); 732cbf031f4SNicholas Bellinger if (!xpt_cmd) { 733cbf031f4SNicholas Bellinger pr_err("Unable to allocate xcopy_pt_cmd\n"); 734cbf031f4SNicholas Bellinger return -ENOMEM; 735cbf031f4SNicholas Bellinger } 736cbf031f4SNicholas Bellinger init_completion(&xpt_cmd->xpt_passthrough_sem); 737cbf031f4SNicholas Bellinger se_cmd = &xpt_cmd->se_cmd; 738cbf031f4SNicholas Bellinger 739cbf031f4SNicholas Bellinger memset(&cdb[0], 0, 16); 740cbf031f4SNicholas Bellinger cdb[0] = WRITE_16; 741cbf031f4SNicholas Bellinger put_unaligned_be64(dst_lba, &cdb[2]); 742cbf031f4SNicholas Bellinger put_unaligned_be32(dst_sectors, &cdb[10]); 743cbf031f4SNicholas Bellinger pr_debug("XCOPY: Built WRITE_16: LBA: %llu Sectors: %u Length: %u\n", 744cbf031f4SNicholas Bellinger (unsigned long long)dst_lba, dst_sectors, length); 745cbf031f4SNicholas Bellinger 746cbf031f4SNicholas Bellinger transport_init_se_cmd(se_cmd, &xcopy_pt_tfo, NULL, length, 747366bda19SNicholas Bellinger DMA_TO_DEVICE, 0, &xpt_cmd->sense_buffer[0]); 748cbf031f4SNicholas Bellinger xop->dst_pt_cmd = xpt_cmd; 749cbf031f4SNicholas Bellinger 750cbf031f4SNicholas Bellinger rc = target_xcopy_setup_pt_cmd(xpt_cmd, xop, dst_dev, &cdb[0], 751cbf031f4SNicholas Bellinger remote_port, false); 752cbf031f4SNicholas Bellinger if (rc < 0) { 753cbf031f4SNicholas Bellinger struct se_cmd *src_cmd = &xop->src_pt_cmd->se_cmd; 754cbf031f4SNicholas Bellinger /* 755cbf031f4SNicholas Bellinger * If the failure happened before the t_mem_list hand-off in 756cbf031f4SNicholas Bellinger * target_xcopy_setup_pt_cmd(), Reset memory + clear flag so that 757cbf031f4SNicholas Bellinger * core releases this memory on error during X-COPY WRITE I/O. 758cbf031f4SNicholas Bellinger */ 759cbf031f4SNicholas Bellinger src_cmd->se_cmd_flags &= ~SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; 760cbf031f4SNicholas Bellinger src_cmd->t_data_sg = xop->xop_data_sg; 761cbf031f4SNicholas Bellinger src_cmd->t_data_nents = xop->xop_data_nents; 762cbf031f4SNicholas Bellinger 763cbf031f4SNicholas Bellinger transport_generic_free_cmd(se_cmd, 0); 764cbf031f4SNicholas Bellinger return rc; 765cbf031f4SNicholas Bellinger } 766cbf031f4SNicholas Bellinger 767cbf031f4SNicholas Bellinger rc = target_xcopy_issue_pt_cmd(xpt_cmd); 768cbf031f4SNicholas Bellinger if (rc < 0) { 769cbf031f4SNicholas Bellinger se_cmd->se_cmd_flags &= ~SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; 770cbf031f4SNicholas Bellinger transport_generic_free_cmd(se_cmd, 0); 771cbf031f4SNicholas Bellinger return rc; 772cbf031f4SNicholas Bellinger } 773cbf031f4SNicholas Bellinger 774cbf031f4SNicholas Bellinger return 0; 775cbf031f4SNicholas Bellinger } 776cbf031f4SNicholas Bellinger 777cbf031f4SNicholas Bellinger static void target_xcopy_do_work(struct work_struct *work) 778cbf031f4SNicholas Bellinger { 779cbf031f4SNicholas Bellinger struct xcopy_op *xop = container_of(work, struct xcopy_op, xop_work); 780cbf031f4SNicholas Bellinger struct se_device *src_dev = xop->src_dev, *dst_dev = xop->dst_dev; 781cbf031f4SNicholas Bellinger struct se_cmd *ec_cmd = xop->xop_se_cmd; 782cbf031f4SNicholas Bellinger sector_t src_lba = xop->src_lba, dst_lba = xop->dst_lba, end_lba; 783cbf031f4SNicholas Bellinger unsigned int max_sectors; 784cbf031f4SNicholas Bellinger int rc; 785cbf031f4SNicholas Bellinger unsigned short nolb = xop->nolb, cur_nolb, max_nolb, copied_nolb = 0; 786cbf031f4SNicholas Bellinger 787cbf031f4SNicholas Bellinger end_lba = src_lba + nolb; 788cbf031f4SNicholas Bellinger /* 789cbf031f4SNicholas Bellinger * Break up XCOPY I/O into hw_max_sectors sized I/O based on the 790cbf031f4SNicholas Bellinger * smallest max_sectors between src_dev + dev_dev, or 791cbf031f4SNicholas Bellinger */ 792cbf031f4SNicholas Bellinger max_sectors = min(src_dev->dev_attrib.hw_max_sectors, 793cbf031f4SNicholas Bellinger dst_dev->dev_attrib.hw_max_sectors); 794cbf031f4SNicholas Bellinger max_sectors = min_t(u32, max_sectors, XCOPY_MAX_SECTORS); 795cbf031f4SNicholas Bellinger 796cbf031f4SNicholas Bellinger max_nolb = min_t(u16, max_sectors, ((u16)(~0U))); 797cbf031f4SNicholas Bellinger 798cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: nolb: %hu, max_nolb: %hu end_lba: %llu\n", 799cbf031f4SNicholas Bellinger nolb, max_nolb, (unsigned long long)end_lba); 800cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Starting src_lba: %llu, dst_lba: %llu\n", 801cbf031f4SNicholas Bellinger (unsigned long long)src_lba, (unsigned long long)dst_lba); 802cbf031f4SNicholas Bellinger 803cbf031f4SNicholas Bellinger while (src_lba < end_lba) { 804cbf031f4SNicholas Bellinger cur_nolb = min(nolb, max_nolb); 805cbf031f4SNicholas Bellinger 806cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Calling read src_dev: %p src_lba: %llu," 807cbf031f4SNicholas Bellinger " cur_nolb: %hu\n", src_dev, (unsigned long long)src_lba, cur_nolb); 808cbf031f4SNicholas Bellinger 809cbf031f4SNicholas Bellinger rc = target_xcopy_read_source(ec_cmd, xop, src_dev, src_lba, cur_nolb); 810cbf031f4SNicholas Bellinger if (rc < 0) 811cbf031f4SNicholas Bellinger goto out; 812cbf031f4SNicholas Bellinger 813cbf031f4SNicholas Bellinger src_lba += cur_nolb; 814cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Incremented READ src_lba to %llu\n", 815cbf031f4SNicholas Bellinger (unsigned long long)src_lba); 816cbf031f4SNicholas Bellinger 817cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Calling write dst_dev: %p dst_lba: %llu," 818cbf031f4SNicholas Bellinger " cur_nolb: %hu\n", dst_dev, (unsigned long long)dst_lba, cur_nolb); 819cbf031f4SNicholas Bellinger 820cbf031f4SNicholas Bellinger rc = target_xcopy_write_destination(ec_cmd, xop, dst_dev, 821cbf031f4SNicholas Bellinger dst_lba, cur_nolb); 822cbf031f4SNicholas Bellinger if (rc < 0) { 823cbf031f4SNicholas Bellinger transport_generic_free_cmd(&xop->src_pt_cmd->se_cmd, 0); 824cbf031f4SNicholas Bellinger goto out; 825cbf031f4SNicholas Bellinger } 826cbf031f4SNicholas Bellinger 827cbf031f4SNicholas Bellinger dst_lba += cur_nolb; 828cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Incremented WRITE dst_lba to %llu\n", 829cbf031f4SNicholas Bellinger (unsigned long long)dst_lba); 830cbf031f4SNicholas Bellinger 831cbf031f4SNicholas Bellinger copied_nolb += cur_nolb; 832cbf031f4SNicholas Bellinger nolb -= cur_nolb; 833cbf031f4SNicholas Bellinger 834cbf031f4SNicholas Bellinger transport_generic_free_cmd(&xop->src_pt_cmd->se_cmd, 0); 835cbf031f4SNicholas Bellinger xop->dst_pt_cmd->se_cmd.se_cmd_flags &= ~SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; 836cbf031f4SNicholas Bellinger 837cbf031f4SNicholas Bellinger transport_generic_free_cmd(&xop->dst_pt_cmd->se_cmd, 0); 838cbf031f4SNicholas Bellinger } 839cbf031f4SNicholas Bellinger 840cbf031f4SNicholas Bellinger xcopy_pt_undepend_remotedev(xop); 841cbf031f4SNicholas Bellinger kfree(xop); 842cbf031f4SNicholas Bellinger 843cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Final src_lba: %llu, dst_lba: %llu\n", 844cbf031f4SNicholas Bellinger (unsigned long long)src_lba, (unsigned long long)dst_lba); 845cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Blocks copied: %hu, Bytes Copied: %u\n", 846cbf031f4SNicholas Bellinger copied_nolb, copied_nolb * dst_dev->dev_attrib.block_size); 847cbf031f4SNicholas Bellinger 848cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Setting X-COPY GOOD status -> sending response\n"); 849cbf031f4SNicholas Bellinger target_complete_cmd(ec_cmd, SAM_STAT_GOOD); 850cbf031f4SNicholas Bellinger return; 851cbf031f4SNicholas Bellinger 852cbf031f4SNicholas Bellinger out: 853cbf031f4SNicholas Bellinger xcopy_pt_undepend_remotedev(xop); 854cbf031f4SNicholas Bellinger kfree(xop); 855cbf031f4SNicholas Bellinger 856cbf031f4SNicholas Bellinger pr_warn("target_xcopy_do_work: Setting X-COPY CHECK_CONDITION -> sending response\n"); 857cbf031f4SNicholas Bellinger ec_cmd->scsi_status = SAM_STAT_CHECK_CONDITION; 858cbf031f4SNicholas Bellinger target_complete_cmd(ec_cmd, SAM_STAT_CHECK_CONDITION); 859cbf031f4SNicholas Bellinger } 860cbf031f4SNicholas Bellinger 861cbf031f4SNicholas Bellinger sense_reason_t target_do_xcopy(struct se_cmd *se_cmd) 862cbf031f4SNicholas Bellinger { 863acb3f260SNicholas Bellinger struct se_device *dev = se_cmd->se_dev; 864cbf031f4SNicholas Bellinger struct xcopy_op *xop = NULL; 865cbf031f4SNicholas Bellinger unsigned char *p = NULL, *seg_desc; 866cbf031f4SNicholas Bellinger unsigned int list_id, list_id_usage, sdll, inline_dl, sa; 86748502ddbSNicholas Bellinger sense_reason_t ret = TCM_INVALID_PARAMETER_LIST; 868cbf031f4SNicholas Bellinger int rc; 869cbf031f4SNicholas Bellinger unsigned short tdll; 870cbf031f4SNicholas Bellinger 871acb3f260SNicholas Bellinger if (!dev->dev_attrib.emulate_3pc) { 872acb3f260SNicholas Bellinger pr_err("EXTENDED_COPY operation explicitly disabled\n"); 873acb3f260SNicholas Bellinger return TCM_UNSUPPORTED_SCSI_OPCODE; 874acb3f260SNicholas Bellinger } 875acb3f260SNicholas Bellinger 876cbf031f4SNicholas Bellinger sa = se_cmd->t_task_cdb[1] & 0x1f; 877cbf031f4SNicholas Bellinger if (sa != 0x00) { 878cbf031f4SNicholas Bellinger pr_err("EXTENDED_COPY(LID4) not supported\n"); 879cbf031f4SNicholas Bellinger return TCM_UNSUPPORTED_SCSI_OPCODE; 880cbf031f4SNicholas Bellinger } 881cbf031f4SNicholas Bellinger 882934a138eSNicholas Bellinger xop = kzalloc(sizeof(struct xcopy_op), GFP_KERNEL); 883934a138eSNicholas Bellinger if (!xop) { 884934a138eSNicholas Bellinger pr_err("Unable to allocate xcopy_op\n"); 885934a138eSNicholas Bellinger return TCM_OUT_OF_RESOURCES; 886934a138eSNicholas Bellinger } 887934a138eSNicholas Bellinger xop->xop_se_cmd = se_cmd; 888934a138eSNicholas Bellinger 889cbf031f4SNicholas Bellinger p = transport_kmap_data_sg(se_cmd); 890cbf031f4SNicholas Bellinger if (!p) { 891cbf031f4SNicholas Bellinger pr_err("transport_kmap_data_sg() failed in target_do_xcopy\n"); 892934a138eSNicholas Bellinger kfree(xop); 893cbf031f4SNicholas Bellinger return TCM_OUT_OF_RESOURCES; 894cbf031f4SNicholas Bellinger } 895cbf031f4SNicholas Bellinger 896cbf031f4SNicholas Bellinger list_id = p[0]; 8973f7a46c6SNicholas Bellinger list_id_usage = (p[1] & 0x18) >> 3; 8983f7a46c6SNicholas Bellinger 899cbf031f4SNicholas Bellinger /* 900cbf031f4SNicholas Bellinger * Determine TARGET DESCRIPTOR LIST LENGTH + SEGMENT DESCRIPTOR LIST LENGTH 901cbf031f4SNicholas Bellinger */ 902cbf031f4SNicholas Bellinger tdll = get_unaligned_be16(&p[2]); 903cbf031f4SNicholas Bellinger sdll = get_unaligned_be32(&p[8]); 904cbf031f4SNicholas Bellinger 905cbf031f4SNicholas Bellinger inline_dl = get_unaligned_be32(&p[12]); 906cbf031f4SNicholas Bellinger if (inline_dl != 0) { 907cbf031f4SNicholas Bellinger pr_err("XCOPY with non zero inline data length\n"); 908cbf031f4SNicholas Bellinger goto out; 909cbf031f4SNicholas Bellinger } 910cbf031f4SNicholas Bellinger 911cbf031f4SNicholas Bellinger pr_debug("Processing XCOPY with list_id: 0x%02x list_id_usage: 0x%02x" 912cbf031f4SNicholas Bellinger " tdll: %hu sdll: %u inline_dl: %u\n", list_id, list_id_usage, 913cbf031f4SNicholas Bellinger tdll, sdll, inline_dl); 914cbf031f4SNicholas Bellinger 915cbf031f4SNicholas Bellinger rc = target_xcopy_parse_target_descriptors(se_cmd, xop, &p[16], tdll); 916cbf031f4SNicholas Bellinger if (rc <= 0) 917cbf031f4SNicholas Bellinger goto out; 918cbf031f4SNicholas Bellinger 91948502ddbSNicholas Bellinger if (xop->src_dev->dev_attrib.block_size != 92048502ddbSNicholas Bellinger xop->dst_dev->dev_attrib.block_size) { 92148502ddbSNicholas Bellinger pr_err("XCOPY: Non matching src_dev block_size: %u + dst_dev" 92248502ddbSNicholas Bellinger " block_size: %u currently unsupported\n", 92348502ddbSNicholas Bellinger xop->src_dev->dev_attrib.block_size, 92448502ddbSNicholas Bellinger xop->dst_dev->dev_attrib.block_size); 92548502ddbSNicholas Bellinger xcopy_pt_undepend_remotedev(xop); 92648502ddbSNicholas Bellinger ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 92748502ddbSNicholas Bellinger goto out; 92848502ddbSNicholas Bellinger } 92948502ddbSNicholas Bellinger 930cbf031f4SNicholas Bellinger pr_debug("XCOPY: Processed %d target descriptors, length: %u\n", rc, 931cbf031f4SNicholas Bellinger rc * XCOPY_TARGET_DESC_LEN); 932cbf031f4SNicholas Bellinger seg_desc = &p[16]; 933cbf031f4SNicholas Bellinger seg_desc += (rc * XCOPY_TARGET_DESC_LEN); 934cbf031f4SNicholas Bellinger 935cbf031f4SNicholas Bellinger rc = target_xcopy_parse_segment_descriptors(se_cmd, xop, seg_desc, sdll); 936cbf031f4SNicholas Bellinger if (rc <= 0) { 937cbf031f4SNicholas Bellinger xcopy_pt_undepend_remotedev(xop); 938cbf031f4SNicholas Bellinger goto out; 939cbf031f4SNicholas Bellinger } 940cbf031f4SNicholas Bellinger transport_kunmap_data_sg(se_cmd); 941cbf031f4SNicholas Bellinger 942cbf031f4SNicholas Bellinger pr_debug("XCOPY: Processed %d segment descriptors, length: %u\n", rc, 943cbf031f4SNicholas Bellinger rc * XCOPY_SEGMENT_DESC_LEN); 944cbf031f4SNicholas Bellinger INIT_WORK(&xop->xop_work, target_xcopy_do_work); 945cbf031f4SNicholas Bellinger queue_work(xcopy_wq, &xop->xop_work); 946cbf031f4SNicholas Bellinger return TCM_NO_SENSE; 947cbf031f4SNicholas Bellinger 948cbf031f4SNicholas Bellinger out: 949cbf031f4SNicholas Bellinger if (p) 950cbf031f4SNicholas Bellinger transport_kunmap_data_sg(se_cmd); 951cbf031f4SNicholas Bellinger kfree(xop); 95248502ddbSNicholas Bellinger return ret; 953cbf031f4SNicholas Bellinger } 954cbf031f4SNicholas Bellinger 955cbf031f4SNicholas Bellinger static sense_reason_t target_rcr_operating_parameters(struct se_cmd *se_cmd) 956cbf031f4SNicholas Bellinger { 957cbf031f4SNicholas Bellinger unsigned char *p; 958cbf031f4SNicholas Bellinger 959cbf031f4SNicholas Bellinger p = transport_kmap_data_sg(se_cmd); 960cbf031f4SNicholas Bellinger if (!p) { 961cbf031f4SNicholas Bellinger pr_err("transport_kmap_data_sg failed in" 962cbf031f4SNicholas Bellinger " target_rcr_operating_parameters\n"); 963cbf031f4SNicholas Bellinger return TCM_OUT_OF_RESOURCES; 964cbf031f4SNicholas Bellinger } 965cbf031f4SNicholas Bellinger 966cbf031f4SNicholas Bellinger if (se_cmd->data_length < 54) { 967cbf031f4SNicholas Bellinger pr_err("Receive Copy Results Op Parameters length" 968cbf031f4SNicholas Bellinger " too small: %u\n", se_cmd->data_length); 969cbf031f4SNicholas Bellinger transport_kunmap_data_sg(se_cmd); 970cbf031f4SNicholas Bellinger return TCM_INVALID_CDB_FIELD; 971cbf031f4SNicholas Bellinger } 972cbf031f4SNicholas Bellinger /* 973cbf031f4SNicholas Bellinger * Set SNLID=1 (Supports no List ID) 974cbf031f4SNicholas Bellinger */ 975cbf031f4SNicholas Bellinger p[4] = 0x1; 976cbf031f4SNicholas Bellinger /* 977cbf031f4SNicholas Bellinger * MAXIMUM TARGET DESCRIPTOR COUNT 978cbf031f4SNicholas Bellinger */ 979cbf031f4SNicholas Bellinger put_unaligned_be16(RCR_OP_MAX_TARGET_DESC_COUNT, &p[8]); 980cbf031f4SNicholas Bellinger /* 981cbf031f4SNicholas Bellinger * MAXIMUM SEGMENT DESCRIPTOR COUNT 982cbf031f4SNicholas Bellinger */ 983cbf031f4SNicholas Bellinger put_unaligned_be16(RCR_OP_MAX_SG_DESC_COUNT, &p[10]); 984cbf031f4SNicholas Bellinger /* 985cbf031f4SNicholas Bellinger * MAXIMUM DESCRIPTOR LIST LENGTH 986cbf031f4SNicholas Bellinger */ 987cbf031f4SNicholas Bellinger put_unaligned_be32(RCR_OP_MAX_DESC_LIST_LEN, &p[12]); 988cbf031f4SNicholas Bellinger /* 989cbf031f4SNicholas Bellinger * MAXIMUM SEGMENT LENGTH 990cbf031f4SNicholas Bellinger */ 991cbf031f4SNicholas Bellinger put_unaligned_be32(RCR_OP_MAX_SEGMENT_LEN, &p[16]); 992cbf031f4SNicholas Bellinger /* 993cbf031f4SNicholas Bellinger * MAXIMUM INLINE DATA LENGTH for SA 0x04 (NOT SUPPORTED) 994cbf031f4SNicholas Bellinger */ 995cbf031f4SNicholas Bellinger put_unaligned_be32(0x0, &p[20]); 996cbf031f4SNicholas Bellinger /* 997cbf031f4SNicholas Bellinger * HELD DATA LIMIT 998cbf031f4SNicholas Bellinger */ 999cbf031f4SNicholas Bellinger put_unaligned_be32(0x0, &p[24]); 1000cbf031f4SNicholas Bellinger /* 1001cbf031f4SNicholas Bellinger * MAXIMUM STREAM DEVICE TRANSFER SIZE 1002cbf031f4SNicholas Bellinger */ 1003cbf031f4SNicholas Bellinger put_unaligned_be32(0x0, &p[28]); 1004cbf031f4SNicholas Bellinger /* 1005cbf031f4SNicholas Bellinger * TOTAL CONCURRENT COPIES 1006cbf031f4SNicholas Bellinger */ 1007cbf031f4SNicholas Bellinger put_unaligned_be16(RCR_OP_TOTAL_CONCURR_COPIES, &p[34]); 1008cbf031f4SNicholas Bellinger /* 1009cbf031f4SNicholas Bellinger * MAXIMUM CONCURRENT COPIES 1010cbf031f4SNicholas Bellinger */ 1011cbf031f4SNicholas Bellinger p[36] = RCR_OP_MAX_CONCURR_COPIES; 1012cbf031f4SNicholas Bellinger /* 1013cbf031f4SNicholas Bellinger * DATA SEGMENT GRANULARITY (log 2) 1014cbf031f4SNicholas Bellinger */ 1015cbf031f4SNicholas Bellinger p[37] = RCR_OP_DATA_SEG_GRAN_LOG2; 1016cbf031f4SNicholas Bellinger /* 1017cbf031f4SNicholas Bellinger * INLINE DATA GRANULARITY log 2) 1018cbf031f4SNicholas Bellinger */ 1019cbf031f4SNicholas Bellinger p[38] = RCR_OP_INLINE_DATA_GRAN_LOG2; 1020cbf031f4SNicholas Bellinger /* 1021cbf031f4SNicholas Bellinger * HELD DATA GRANULARITY 1022cbf031f4SNicholas Bellinger */ 1023cbf031f4SNicholas Bellinger p[39] = RCR_OP_HELD_DATA_GRAN_LOG2; 1024cbf031f4SNicholas Bellinger /* 1025cbf031f4SNicholas Bellinger * IMPLEMENTED DESCRIPTOR LIST LENGTH 1026cbf031f4SNicholas Bellinger */ 1027cbf031f4SNicholas Bellinger p[43] = 0x2; 1028cbf031f4SNicholas Bellinger /* 1029cbf031f4SNicholas Bellinger * List of implemented descriptor type codes (ordered) 1030cbf031f4SNicholas Bellinger */ 1031cbf031f4SNicholas Bellinger p[44] = 0x02; /* Copy Block to Block device */ 1032cbf031f4SNicholas Bellinger p[45] = 0xe4; /* Identification descriptor target descriptor */ 1033cbf031f4SNicholas Bellinger 1034cbf031f4SNicholas Bellinger /* 1035cbf031f4SNicholas Bellinger * AVAILABLE DATA (n-3) 1036cbf031f4SNicholas Bellinger */ 1037cbf031f4SNicholas Bellinger put_unaligned_be32(42, &p[0]); 1038cbf031f4SNicholas Bellinger 1039cbf031f4SNicholas Bellinger transport_kunmap_data_sg(se_cmd); 1040cbf031f4SNicholas Bellinger target_complete_cmd(se_cmd, GOOD); 1041cbf031f4SNicholas Bellinger 1042cbf031f4SNicholas Bellinger return TCM_NO_SENSE; 1043cbf031f4SNicholas Bellinger } 1044cbf031f4SNicholas Bellinger 1045cbf031f4SNicholas Bellinger sense_reason_t target_do_receive_copy_results(struct se_cmd *se_cmd) 1046cbf031f4SNicholas Bellinger { 1047cbf031f4SNicholas Bellinger unsigned char *cdb = &se_cmd->t_task_cdb[0]; 1048cbf031f4SNicholas Bellinger int sa = (cdb[1] & 0x1f), list_id = cdb[2]; 1049cbf031f4SNicholas Bellinger sense_reason_t rc = TCM_NO_SENSE; 1050cbf031f4SNicholas Bellinger 1051cbf031f4SNicholas Bellinger pr_debug("Entering target_do_receive_copy_results: SA: 0x%02x, List ID:" 1052cbf031f4SNicholas Bellinger " 0x%02x, AL: %u\n", sa, list_id, se_cmd->data_length); 1053cbf031f4SNicholas Bellinger 1054cbf031f4SNicholas Bellinger if (list_id != 0) { 1055cbf031f4SNicholas Bellinger pr_err("Receive Copy Results with non zero list identifier" 1056cbf031f4SNicholas Bellinger " not supported\n"); 1057cbf031f4SNicholas Bellinger return TCM_INVALID_CDB_FIELD; 1058cbf031f4SNicholas Bellinger } 1059cbf031f4SNicholas Bellinger 1060cbf031f4SNicholas Bellinger switch (sa) { 1061cbf031f4SNicholas Bellinger case RCR_SA_OPERATING_PARAMETERS: 1062cbf031f4SNicholas Bellinger rc = target_rcr_operating_parameters(se_cmd); 1063cbf031f4SNicholas Bellinger break; 1064cbf031f4SNicholas Bellinger case RCR_SA_COPY_STATUS: 1065cbf031f4SNicholas Bellinger case RCR_SA_RECEIVE_DATA: 1066cbf031f4SNicholas Bellinger case RCR_SA_FAILED_SEGMENT_DETAILS: 1067cbf031f4SNicholas Bellinger default: 1068cbf031f4SNicholas Bellinger pr_err("Unsupported SA for receive copy results: 0x%02x\n", sa); 1069cbf031f4SNicholas Bellinger return TCM_INVALID_CDB_FIELD; 1070cbf031f4SNicholas Bellinger } 1071cbf031f4SNicholas Bellinger 1072cbf031f4SNicholas Bellinger return rc; 1073cbf031f4SNicholas Bellinger } 1074