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> 28ba929992SBart Van Assche #include <scsi/scsi_proto.h> 29cbf031f4SNicholas Bellinger #include <asm/unaligned.h> 30cbf031f4SNicholas Bellinger 31cbf031f4SNicholas Bellinger #include <target/target_core_base.h> 32cbf031f4SNicholas Bellinger #include <target/target_core_backend.h> 33cbf031f4SNicholas Bellinger #include <target/target_core_fabric.h> 34cbf031f4SNicholas Bellinger 35b13876d2SChristoph Hellwig #include "target_core_internal.h" 36cbf031f4SNicholas Bellinger #include "target_core_pr.h" 37cbf031f4SNicholas Bellinger #include "target_core_ua.h" 38cbf031f4SNicholas Bellinger #include "target_core_xcopy.h" 39cbf031f4SNicholas Bellinger 40cbf031f4SNicholas Bellinger static struct workqueue_struct *xcopy_wq = NULL; 41cbf031f4SNicholas Bellinger 42cbf031f4SNicholas Bellinger static int target_xcopy_gen_naa_ieee(struct se_device *dev, unsigned char *buf) 43cbf031f4SNicholas Bellinger { 44cbf031f4SNicholas Bellinger int off = 0; 45cbf031f4SNicholas Bellinger 46cbf031f4SNicholas Bellinger buf[off++] = (0x6 << 4); 47cbf031f4SNicholas Bellinger buf[off++] = 0x01; 48cbf031f4SNicholas Bellinger buf[off++] = 0x40; 49cbf031f4SNicholas Bellinger buf[off] = (0x5 << 4); 50cbf031f4SNicholas Bellinger 51cbf031f4SNicholas Bellinger spc_parse_naa_6h_vendor_specific(dev, &buf[off]); 52cbf031f4SNicholas Bellinger return 0; 53cbf031f4SNicholas Bellinger } 54cbf031f4SNicholas Bellinger 55cbf031f4SNicholas Bellinger static int target_xcopy_locate_se_dev_e4(struct se_cmd *se_cmd, struct xcopy_op *xop, 56cbf031f4SNicholas Bellinger bool src) 57cbf031f4SNicholas Bellinger { 58cbf031f4SNicholas Bellinger struct se_device *se_dev; 59cbf031f4SNicholas Bellinger unsigned char tmp_dev_wwn[XCOPY_NAA_IEEE_REGEX_LEN], *dev_wwn; 60cbf031f4SNicholas Bellinger int rc; 61cbf031f4SNicholas Bellinger 620bcc297eSChristophe Vu-Brugier if (src) 63cbf031f4SNicholas Bellinger dev_wwn = &xop->dst_tid_wwn[0]; 64cbf031f4SNicholas Bellinger else 65cbf031f4SNicholas Bellinger dev_wwn = &xop->src_tid_wwn[0]; 66cbf031f4SNicholas Bellinger 67cbf031f4SNicholas Bellinger mutex_lock(&g_device_mutex); 68cbf031f4SNicholas Bellinger list_for_each_entry(se_dev, &g_device_list, g_dev_node) { 69cbf031f4SNicholas Bellinger 70acb3f260SNicholas Bellinger if (!se_dev->dev_attrib.emulate_3pc) 71acb3f260SNicholas Bellinger continue; 72acb3f260SNicholas Bellinger 73cbf031f4SNicholas Bellinger memset(&tmp_dev_wwn[0], 0, XCOPY_NAA_IEEE_REGEX_LEN); 74cbf031f4SNicholas Bellinger target_xcopy_gen_naa_ieee(se_dev, &tmp_dev_wwn[0]); 75cbf031f4SNicholas Bellinger 76cbf031f4SNicholas Bellinger rc = memcmp(&tmp_dev_wwn[0], dev_wwn, XCOPY_NAA_IEEE_REGEX_LEN); 77cbf031f4SNicholas Bellinger if (rc != 0) 78cbf031f4SNicholas Bellinger continue; 79cbf031f4SNicholas Bellinger 800bcc297eSChristophe Vu-Brugier if (src) { 81cbf031f4SNicholas Bellinger xop->dst_dev = se_dev; 82cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: Setting xop->dst_dev: %p from located" 83cbf031f4SNicholas Bellinger " se_dev\n", xop->dst_dev); 84cbf031f4SNicholas Bellinger } else { 85cbf031f4SNicholas Bellinger xop->src_dev = se_dev; 86cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: Setting xop->src_dev: %p from located" 87cbf031f4SNicholas Bellinger " se_dev\n", xop->src_dev); 88cbf031f4SNicholas Bellinger } 89cbf031f4SNicholas Bellinger 90d588cf8fSChristoph Hellwig rc = target_depend_item(&se_dev->dev_group.cg_item); 91cbf031f4SNicholas Bellinger if (rc != 0) { 92cbf031f4SNicholas Bellinger pr_err("configfs_depend_item attempt failed:" 93cbf031f4SNicholas Bellinger " %d for se_dev: %p\n", rc, se_dev); 94cbf031f4SNicholas Bellinger mutex_unlock(&g_device_mutex); 95cbf031f4SNicholas Bellinger return rc; 96cbf031f4SNicholas Bellinger } 97cbf031f4SNicholas Bellinger 98d588cf8fSChristoph Hellwig pr_debug("Called configfs_depend_item for se_dev: %p" 99d588cf8fSChristoph Hellwig " se_dev->se_dev_group: %p\n", se_dev, 100cbf031f4SNicholas Bellinger &se_dev->dev_group); 101cbf031f4SNicholas Bellinger 102cbf031f4SNicholas Bellinger mutex_unlock(&g_device_mutex); 103cbf031f4SNicholas Bellinger return 0; 104cbf031f4SNicholas Bellinger } 105cbf031f4SNicholas Bellinger mutex_unlock(&g_device_mutex); 106cbf031f4SNicholas Bellinger 107cbf031f4SNicholas Bellinger pr_err("Unable to locate 0xe4 descriptor for EXTENDED_COPY\n"); 108cbf031f4SNicholas Bellinger return -EINVAL; 109cbf031f4SNicholas Bellinger } 110cbf031f4SNicholas Bellinger 111cbf031f4SNicholas Bellinger static int target_xcopy_parse_tiddesc_e4(struct se_cmd *se_cmd, struct xcopy_op *xop, 112cbf031f4SNicholas Bellinger unsigned char *p, bool src) 113cbf031f4SNicholas Bellinger { 114cbf031f4SNicholas Bellinger unsigned char *desc = p; 115cbf031f4SNicholas Bellinger unsigned short ript; 116cbf031f4SNicholas Bellinger u8 desig_len; 117cbf031f4SNicholas Bellinger /* 118cbf031f4SNicholas Bellinger * Extract RELATIVE INITIATOR PORT IDENTIFIER 119cbf031f4SNicholas Bellinger */ 120cbf031f4SNicholas Bellinger ript = get_unaligned_be16(&desc[2]); 121cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: RELATIVE INITIATOR PORT IDENTIFIER: %hu\n", ript); 122cbf031f4SNicholas Bellinger /* 123cbf031f4SNicholas Bellinger * Check for supported code set, association, and designator type 124cbf031f4SNicholas Bellinger */ 125cbf031f4SNicholas Bellinger if ((desc[4] & 0x0f) != 0x1) { 126cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: code set of non binary type not supported\n"); 127cbf031f4SNicholas Bellinger return -EINVAL; 128cbf031f4SNicholas Bellinger } 129cbf031f4SNicholas Bellinger if ((desc[5] & 0x30) != 0x00) { 130cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: association other than LUN not supported\n"); 131cbf031f4SNicholas Bellinger return -EINVAL; 132cbf031f4SNicholas Bellinger } 133cbf031f4SNicholas Bellinger if ((desc[5] & 0x0f) != 0x3) { 134cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: designator type unsupported: 0x%02x\n", 135cbf031f4SNicholas Bellinger (desc[5] & 0x0f)); 136cbf031f4SNicholas Bellinger return -EINVAL; 137cbf031f4SNicholas Bellinger } 138cbf031f4SNicholas Bellinger /* 139cbf031f4SNicholas Bellinger * Check for matching 16 byte length for NAA IEEE Registered Extended 140cbf031f4SNicholas Bellinger * Assigned designator 141cbf031f4SNicholas Bellinger */ 142cbf031f4SNicholas Bellinger desig_len = desc[7]; 143cbf031f4SNicholas Bellinger if (desig_len != 16) { 144cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: invalid desig_len: %d\n", (int)desig_len); 145cbf031f4SNicholas Bellinger return -EINVAL; 146cbf031f4SNicholas Bellinger } 147cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: desig_len: %d\n", (int)desig_len); 148cbf031f4SNicholas Bellinger /* 149cbf031f4SNicholas Bellinger * Check for NAA IEEE Registered Extended Assigned header.. 150cbf031f4SNicholas Bellinger */ 151cbf031f4SNicholas Bellinger if ((desc[8] & 0xf0) != 0x60) { 152cbf031f4SNicholas Bellinger pr_err("XCOPY 0xe4: Unsupported DESIGNATOR TYPE: 0x%02x\n", 153cbf031f4SNicholas Bellinger (desc[8] & 0xf0)); 154cbf031f4SNicholas Bellinger return -EINVAL; 155cbf031f4SNicholas Bellinger } 156cbf031f4SNicholas Bellinger 1570bcc297eSChristophe Vu-Brugier if (src) { 158cbf031f4SNicholas Bellinger memcpy(&xop->src_tid_wwn[0], &desc[8], XCOPY_NAA_IEEE_REGEX_LEN); 159cbf031f4SNicholas Bellinger /* 160cbf031f4SNicholas Bellinger * Determine if the source designator matches the local device 161cbf031f4SNicholas Bellinger */ 162cbf031f4SNicholas Bellinger if (!memcmp(&xop->local_dev_wwn[0], &xop->src_tid_wwn[0], 163cbf031f4SNicholas Bellinger XCOPY_NAA_IEEE_REGEX_LEN)) { 164cbf031f4SNicholas Bellinger xop->op_origin = XCOL_SOURCE_RECV_OP; 165cbf031f4SNicholas Bellinger xop->src_dev = se_cmd->se_dev; 166cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: Set xop->src_dev %p from source" 167cbf031f4SNicholas Bellinger " received xop\n", xop->src_dev); 168cbf031f4SNicholas Bellinger } 169cbf031f4SNicholas Bellinger } else { 170cbf031f4SNicholas Bellinger memcpy(&xop->dst_tid_wwn[0], &desc[8], XCOPY_NAA_IEEE_REGEX_LEN); 171cbf031f4SNicholas Bellinger /* 172cbf031f4SNicholas Bellinger * Determine if the destination designator matches the local device 173cbf031f4SNicholas Bellinger */ 174cbf031f4SNicholas Bellinger if (!memcmp(&xop->local_dev_wwn[0], &xop->dst_tid_wwn[0], 175cbf031f4SNicholas Bellinger XCOPY_NAA_IEEE_REGEX_LEN)) { 176cbf031f4SNicholas Bellinger xop->op_origin = XCOL_DEST_RECV_OP; 177cbf031f4SNicholas Bellinger xop->dst_dev = se_cmd->se_dev; 178cbf031f4SNicholas Bellinger pr_debug("XCOPY 0xe4: Set xop->dst_dev: %p from destination" 179cbf031f4SNicholas Bellinger " received xop\n", xop->dst_dev); 180cbf031f4SNicholas Bellinger } 181cbf031f4SNicholas Bellinger } 182cbf031f4SNicholas Bellinger 183cbf031f4SNicholas Bellinger return 0; 184cbf031f4SNicholas Bellinger } 185cbf031f4SNicholas Bellinger 186cbf031f4SNicholas Bellinger static int target_xcopy_parse_target_descriptors(struct se_cmd *se_cmd, 187cbf031f4SNicholas Bellinger struct xcopy_op *xop, unsigned char *p, 188cbf031f4SNicholas Bellinger unsigned short tdll) 189cbf031f4SNicholas Bellinger { 190cbf031f4SNicholas Bellinger struct se_device *local_dev = se_cmd->se_dev; 191cbf031f4SNicholas Bellinger unsigned char *desc = p; 192cbf031f4SNicholas Bellinger int offset = tdll % XCOPY_TARGET_DESC_LEN, rc, ret = 0; 193cbf031f4SNicholas Bellinger unsigned short start = 0; 194cbf031f4SNicholas Bellinger bool src = true; 195cbf031f4SNicholas Bellinger 196cbf031f4SNicholas Bellinger if (offset != 0) { 197cbf031f4SNicholas Bellinger pr_err("XCOPY target descriptor list length is not" 198cbf031f4SNicholas Bellinger " multiple of %d\n", XCOPY_TARGET_DESC_LEN); 199cbf031f4SNicholas Bellinger return -EINVAL; 200cbf031f4SNicholas Bellinger } 201cbf031f4SNicholas Bellinger if (tdll > 64) { 202cbf031f4SNicholas Bellinger pr_err("XCOPY target descriptor supports a maximum" 203cbf031f4SNicholas Bellinger " two src/dest descriptors, tdll: %hu too large..\n", tdll); 204cbf031f4SNicholas Bellinger return -EINVAL; 205cbf031f4SNicholas Bellinger } 206cbf031f4SNicholas Bellinger /* 207cbf031f4SNicholas Bellinger * Generate an IEEE Registered Extended designator based upon the 208cbf031f4SNicholas Bellinger * se_device the XCOPY was received upon.. 209cbf031f4SNicholas Bellinger */ 210cbf031f4SNicholas Bellinger memset(&xop->local_dev_wwn[0], 0, XCOPY_NAA_IEEE_REGEX_LEN); 211cbf031f4SNicholas Bellinger target_xcopy_gen_naa_ieee(local_dev, &xop->local_dev_wwn[0]); 212cbf031f4SNicholas Bellinger 213cbf031f4SNicholas Bellinger while (start < tdll) { 214cbf031f4SNicholas Bellinger /* 215cbf031f4SNicholas Bellinger * Check target descriptor identification with 0xE4 type with 216cbf031f4SNicholas Bellinger * use VPD 0x83 WWPN matching .. 217cbf031f4SNicholas Bellinger */ 218cbf031f4SNicholas Bellinger switch (desc[0]) { 219cbf031f4SNicholas Bellinger case 0xe4: 220cbf031f4SNicholas Bellinger rc = target_xcopy_parse_tiddesc_e4(se_cmd, xop, 221cbf031f4SNicholas Bellinger &desc[0], src); 222cbf031f4SNicholas Bellinger if (rc != 0) 223cbf031f4SNicholas Bellinger goto out; 224cbf031f4SNicholas Bellinger /* 225cbf031f4SNicholas Bellinger * Assume target descriptors are in source -> destination order.. 226cbf031f4SNicholas Bellinger */ 2270bcc297eSChristophe Vu-Brugier if (src) 228cbf031f4SNicholas Bellinger src = false; 229cbf031f4SNicholas Bellinger else 230cbf031f4SNicholas Bellinger src = true; 231cbf031f4SNicholas Bellinger start += XCOPY_TARGET_DESC_LEN; 232cbf031f4SNicholas Bellinger desc += XCOPY_TARGET_DESC_LEN; 233cbf031f4SNicholas Bellinger ret++; 234cbf031f4SNicholas Bellinger break; 235cbf031f4SNicholas Bellinger default: 236cbf031f4SNicholas Bellinger pr_err("XCOPY unsupported descriptor type code:" 237cbf031f4SNicholas Bellinger " 0x%02x\n", desc[0]); 238cbf031f4SNicholas Bellinger goto out; 239cbf031f4SNicholas Bellinger } 240cbf031f4SNicholas Bellinger } 241cbf031f4SNicholas Bellinger 242cbf031f4SNicholas Bellinger if (xop->op_origin == XCOL_SOURCE_RECV_OP) 243cbf031f4SNicholas Bellinger rc = target_xcopy_locate_se_dev_e4(se_cmd, xop, true); 244cbf031f4SNicholas Bellinger else 245cbf031f4SNicholas Bellinger rc = target_xcopy_locate_se_dev_e4(se_cmd, xop, false); 246cbf031f4SNicholas Bellinger 247cbf031f4SNicholas Bellinger if (rc < 0) 248cbf031f4SNicholas Bellinger goto out; 249cbf031f4SNicholas Bellinger 250cbf031f4SNicholas Bellinger pr_debug("XCOPY TGT desc: Source dev: %p NAA IEEE WWN: 0x%16phN\n", 251cbf031f4SNicholas Bellinger xop->src_dev, &xop->src_tid_wwn[0]); 252cbf031f4SNicholas Bellinger pr_debug("XCOPY TGT desc: Dest dev: %p NAA IEEE WWN: 0x%16phN\n", 253cbf031f4SNicholas Bellinger xop->dst_dev, &xop->dst_tid_wwn[0]); 254cbf031f4SNicholas Bellinger 255cbf031f4SNicholas Bellinger return ret; 256cbf031f4SNicholas Bellinger 257cbf031f4SNicholas Bellinger out: 258cbf031f4SNicholas Bellinger return -EINVAL; 259cbf031f4SNicholas Bellinger } 260cbf031f4SNicholas Bellinger 261cbf031f4SNicholas Bellinger static int target_xcopy_parse_segdesc_02(struct se_cmd *se_cmd, struct xcopy_op *xop, 262cbf031f4SNicholas Bellinger unsigned char *p) 263cbf031f4SNicholas Bellinger { 264cbf031f4SNicholas Bellinger unsigned char *desc = p; 265cbf031f4SNicholas Bellinger int dc = (desc[1] & 0x02); 266cbf031f4SNicholas Bellinger unsigned short desc_len; 267cbf031f4SNicholas Bellinger 268cbf031f4SNicholas Bellinger desc_len = get_unaligned_be16(&desc[2]); 269cbf031f4SNicholas Bellinger if (desc_len != 0x18) { 270cbf031f4SNicholas Bellinger pr_err("XCOPY segment desc 0x02: Illegal desc_len:" 271cbf031f4SNicholas Bellinger " %hu\n", desc_len); 272cbf031f4SNicholas Bellinger return -EINVAL; 273cbf031f4SNicholas Bellinger } 274cbf031f4SNicholas Bellinger 275cbf031f4SNicholas Bellinger xop->stdi = get_unaligned_be16(&desc[4]); 276cbf031f4SNicholas Bellinger xop->dtdi = get_unaligned_be16(&desc[6]); 277cbf031f4SNicholas Bellinger pr_debug("XCOPY seg desc 0x02: desc_len: %hu stdi: %hu dtdi: %hu, DC: %d\n", 278cbf031f4SNicholas Bellinger desc_len, xop->stdi, xop->dtdi, dc); 279cbf031f4SNicholas Bellinger 280cbf031f4SNicholas Bellinger xop->nolb = get_unaligned_be16(&desc[10]); 281cbf031f4SNicholas Bellinger xop->src_lba = get_unaligned_be64(&desc[12]); 282cbf031f4SNicholas Bellinger xop->dst_lba = get_unaligned_be64(&desc[20]); 283cbf031f4SNicholas Bellinger pr_debug("XCOPY seg desc 0x02: nolb: %hu src_lba: %llu dst_lba: %llu\n", 284cbf031f4SNicholas Bellinger xop->nolb, (unsigned long long)xop->src_lba, 285cbf031f4SNicholas Bellinger (unsigned long long)xop->dst_lba); 286cbf031f4SNicholas Bellinger 287cbf031f4SNicholas Bellinger if (dc != 0) { 2883e9e01deSNicholas Bellinger xop->dbl = (desc[29] & 0xff) << 16; 2893e9e01deSNicholas Bellinger xop->dbl |= (desc[30] & 0xff) << 8; 290cbf031f4SNicholas Bellinger xop->dbl |= desc[31] & 0xff; 291cbf031f4SNicholas Bellinger 292cbf031f4SNicholas Bellinger pr_debug("XCOPY seg desc 0x02: DC=1 w/ dbl: %u\n", xop->dbl); 293cbf031f4SNicholas Bellinger } 294cbf031f4SNicholas Bellinger return 0; 295cbf031f4SNicholas Bellinger } 296cbf031f4SNicholas Bellinger 297cbf031f4SNicholas Bellinger static int target_xcopy_parse_segment_descriptors(struct se_cmd *se_cmd, 298cbf031f4SNicholas Bellinger struct xcopy_op *xop, unsigned char *p, 299cbf031f4SNicholas Bellinger unsigned int sdll) 300cbf031f4SNicholas Bellinger { 301cbf031f4SNicholas Bellinger unsigned char *desc = p; 302cbf031f4SNicholas Bellinger unsigned int start = 0; 303cbf031f4SNicholas Bellinger int offset = sdll % XCOPY_SEGMENT_DESC_LEN, rc, ret = 0; 304cbf031f4SNicholas Bellinger 305cbf031f4SNicholas Bellinger if (offset != 0) { 306cbf031f4SNicholas Bellinger pr_err("XCOPY segment descriptor list length is not" 307cbf031f4SNicholas Bellinger " multiple of %d\n", XCOPY_SEGMENT_DESC_LEN); 308cbf031f4SNicholas Bellinger return -EINVAL; 309cbf031f4SNicholas Bellinger } 310cbf031f4SNicholas Bellinger 311cbf031f4SNicholas Bellinger while (start < sdll) { 312cbf031f4SNicholas Bellinger /* 313cbf031f4SNicholas Bellinger * Check segment descriptor type code for block -> block 314cbf031f4SNicholas Bellinger */ 315cbf031f4SNicholas Bellinger switch (desc[0]) { 316cbf031f4SNicholas Bellinger case 0x02: 317cbf031f4SNicholas Bellinger rc = target_xcopy_parse_segdesc_02(se_cmd, xop, desc); 318cbf031f4SNicholas Bellinger if (rc < 0) 319cbf031f4SNicholas Bellinger goto out; 320cbf031f4SNicholas Bellinger 321cbf031f4SNicholas Bellinger ret++; 322cbf031f4SNicholas Bellinger start += XCOPY_SEGMENT_DESC_LEN; 323cbf031f4SNicholas Bellinger desc += XCOPY_SEGMENT_DESC_LEN; 324cbf031f4SNicholas Bellinger break; 325cbf031f4SNicholas Bellinger default: 3266774def6SMasanari Iida pr_err("XCOPY unsupported segment descriptor" 327cbf031f4SNicholas Bellinger "type: 0x%02x\n", desc[0]); 328cbf031f4SNicholas Bellinger goto out; 329cbf031f4SNicholas Bellinger } 330cbf031f4SNicholas Bellinger } 331cbf031f4SNicholas Bellinger 332cbf031f4SNicholas Bellinger return ret; 333cbf031f4SNicholas Bellinger 334cbf031f4SNicholas Bellinger out: 335cbf031f4SNicholas Bellinger return -EINVAL; 336cbf031f4SNicholas Bellinger } 337cbf031f4SNicholas Bellinger 338cbf031f4SNicholas Bellinger /* 339cbf031f4SNicholas Bellinger * Start xcopy_pt ops 340cbf031f4SNicholas Bellinger */ 341cbf031f4SNicholas Bellinger 342cbf031f4SNicholas Bellinger struct xcopy_pt_cmd { 343cbf031f4SNicholas Bellinger bool remote_port; 344cbf031f4SNicholas Bellinger struct se_cmd se_cmd; 345cbf031f4SNicholas Bellinger struct xcopy_op *xcopy_op; 346cbf031f4SNicholas Bellinger struct completion xpt_passthrough_sem; 347366bda19SNicholas Bellinger unsigned char sense_buffer[TRANSPORT_SENSE_BUFFER]; 348cbf031f4SNicholas Bellinger }; 349cbf031f4SNicholas Bellinger 350adf653f9SChristoph Hellwig struct se_portal_group xcopy_pt_tpg; 351cbf031f4SNicholas Bellinger static struct se_session xcopy_pt_sess; 352cbf031f4SNicholas Bellinger static struct se_node_acl xcopy_pt_nacl; 353cbf031f4SNicholas Bellinger 354cbf031f4SNicholas Bellinger static char *xcopy_pt_get_fabric_name(void) 355cbf031f4SNicholas Bellinger { 356cbf031f4SNicholas Bellinger return "xcopy-pt"; 357cbf031f4SNicholas Bellinger } 358cbf031f4SNicholas Bellinger 359cbf031f4SNicholas Bellinger static int xcopy_pt_get_cmd_state(struct se_cmd *se_cmd) 360cbf031f4SNicholas Bellinger { 361cbf031f4SNicholas Bellinger return 0; 362cbf031f4SNicholas Bellinger } 363cbf031f4SNicholas Bellinger 364cbf031f4SNicholas Bellinger static void xcopy_pt_undepend_remotedev(struct xcopy_op *xop) 365cbf031f4SNicholas Bellinger { 366cbf031f4SNicholas Bellinger struct se_device *remote_dev; 367cbf031f4SNicholas Bellinger 368cbf031f4SNicholas Bellinger if (xop->op_origin == XCOL_SOURCE_RECV_OP) 369cbf031f4SNicholas Bellinger remote_dev = xop->dst_dev; 370cbf031f4SNicholas Bellinger else 371cbf031f4SNicholas Bellinger remote_dev = xop->src_dev; 372cbf031f4SNicholas Bellinger 373d588cf8fSChristoph Hellwig pr_debug("Calling configfs_undepend_item for" 374cbf031f4SNicholas Bellinger " remote_dev: %p remote_dev->dev_group: %p\n", 375d588cf8fSChristoph Hellwig remote_dev, &remote_dev->dev_group.cg_item); 376cbf031f4SNicholas Bellinger 377d588cf8fSChristoph Hellwig target_undepend_item(&remote_dev->dev_group.cg_item); 378cbf031f4SNicholas Bellinger } 379cbf031f4SNicholas Bellinger 380cbf031f4SNicholas Bellinger static void xcopy_pt_release_cmd(struct se_cmd *se_cmd) 381cbf031f4SNicholas Bellinger { 382cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd = container_of(se_cmd, 383cbf031f4SNicholas Bellinger struct xcopy_pt_cmd, se_cmd); 384cbf031f4SNicholas Bellinger 385cbf031f4SNicholas Bellinger kfree(xpt_cmd); 386cbf031f4SNicholas Bellinger } 387cbf031f4SNicholas Bellinger 388cbf031f4SNicholas Bellinger static int xcopy_pt_check_stop_free(struct se_cmd *se_cmd) 389cbf031f4SNicholas Bellinger { 390cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd = container_of(se_cmd, 391cbf031f4SNicholas Bellinger struct xcopy_pt_cmd, se_cmd); 392cbf031f4SNicholas Bellinger 393cbf031f4SNicholas Bellinger complete(&xpt_cmd->xpt_passthrough_sem); 394cbf031f4SNicholas Bellinger return 0; 395cbf031f4SNicholas Bellinger } 396cbf031f4SNicholas Bellinger 397cbf031f4SNicholas Bellinger static int xcopy_pt_write_pending(struct se_cmd *se_cmd) 398cbf031f4SNicholas Bellinger { 399cbf031f4SNicholas Bellinger return 0; 400cbf031f4SNicholas Bellinger } 401cbf031f4SNicholas Bellinger 402cbf031f4SNicholas Bellinger static int xcopy_pt_write_pending_status(struct se_cmd *se_cmd) 403cbf031f4SNicholas Bellinger { 404cbf031f4SNicholas Bellinger return 0; 405cbf031f4SNicholas Bellinger } 406cbf031f4SNicholas Bellinger 407cbf031f4SNicholas Bellinger static int xcopy_pt_queue_data_in(struct se_cmd *se_cmd) 408cbf031f4SNicholas Bellinger { 409cbf031f4SNicholas Bellinger return 0; 410cbf031f4SNicholas Bellinger } 411cbf031f4SNicholas Bellinger 412cbf031f4SNicholas Bellinger static int xcopy_pt_queue_status(struct se_cmd *se_cmd) 413cbf031f4SNicholas Bellinger { 414cbf031f4SNicholas Bellinger return 0; 415cbf031f4SNicholas Bellinger } 416cbf031f4SNicholas Bellinger 4179ac8928eSChristoph Hellwig static const struct target_core_fabric_ops xcopy_pt_tfo = { 418cbf031f4SNicholas Bellinger .get_fabric_name = xcopy_pt_get_fabric_name, 419cbf031f4SNicholas Bellinger .get_cmd_state = xcopy_pt_get_cmd_state, 420cbf031f4SNicholas Bellinger .release_cmd = xcopy_pt_release_cmd, 421cbf031f4SNicholas Bellinger .check_stop_free = xcopy_pt_check_stop_free, 422cbf031f4SNicholas Bellinger .write_pending = xcopy_pt_write_pending, 423cbf031f4SNicholas Bellinger .write_pending_status = xcopy_pt_write_pending_status, 424cbf031f4SNicholas Bellinger .queue_data_in = xcopy_pt_queue_data_in, 425cbf031f4SNicholas Bellinger .queue_status = xcopy_pt_queue_status, 426cbf031f4SNicholas Bellinger }; 427cbf031f4SNicholas Bellinger 428cbf031f4SNicholas Bellinger /* 429cbf031f4SNicholas Bellinger * End xcopy_pt_ops 430cbf031f4SNicholas Bellinger */ 431cbf031f4SNicholas Bellinger 432cbf031f4SNicholas Bellinger int target_xcopy_setup_pt(void) 433cbf031f4SNicholas Bellinger { 434cbf031f4SNicholas Bellinger xcopy_wq = alloc_workqueue("xcopy_wq", WQ_MEM_RECLAIM, 0); 435cbf031f4SNicholas Bellinger if (!xcopy_wq) { 436cbf031f4SNicholas Bellinger pr_err("Unable to allocate xcopy_wq\n"); 437cbf031f4SNicholas Bellinger return -ENOMEM; 438cbf031f4SNicholas Bellinger } 439cbf031f4SNicholas Bellinger 440cbf031f4SNicholas Bellinger memset(&xcopy_pt_tpg, 0, sizeof(struct se_portal_group)); 441cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_tpg.se_tpg_node); 442cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_tpg.acl_node_list); 443cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_tpg.tpg_sess_list); 444cbf031f4SNicholas Bellinger 445cbf031f4SNicholas Bellinger xcopy_pt_tpg.se_tpg_tfo = &xcopy_pt_tfo; 446cbf031f4SNicholas Bellinger 447cbf031f4SNicholas Bellinger memset(&xcopy_pt_nacl, 0, sizeof(struct se_node_acl)); 448cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_nacl.acl_list); 449cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_nacl.acl_sess_list); 450cbf031f4SNicholas Bellinger memset(&xcopy_pt_sess, 0, sizeof(struct se_session)); 451cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_sess.sess_list); 452cbf031f4SNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_sess.sess_acl_list); 4534416f89bSNicholas Bellinger INIT_LIST_HEAD(&xcopy_pt_sess.sess_cmd_list); 4544416f89bSNicholas Bellinger spin_lock_init(&xcopy_pt_sess.sess_cmd_lock); 455cbf031f4SNicholas Bellinger 456cbf031f4SNicholas Bellinger xcopy_pt_nacl.se_tpg = &xcopy_pt_tpg; 457cbf031f4SNicholas Bellinger xcopy_pt_nacl.nacl_sess = &xcopy_pt_sess; 458cbf031f4SNicholas Bellinger 459cbf031f4SNicholas Bellinger xcopy_pt_sess.se_tpg = &xcopy_pt_tpg; 460cbf031f4SNicholas Bellinger xcopy_pt_sess.se_node_acl = &xcopy_pt_nacl; 461cbf031f4SNicholas Bellinger 462cbf031f4SNicholas Bellinger return 0; 463cbf031f4SNicholas Bellinger } 464cbf031f4SNicholas Bellinger 465cbf031f4SNicholas Bellinger void target_xcopy_release_pt(void) 466cbf031f4SNicholas Bellinger { 467cbf031f4SNicholas Bellinger if (xcopy_wq) 468cbf031f4SNicholas Bellinger destroy_workqueue(xcopy_wq); 469cbf031f4SNicholas Bellinger } 470cbf031f4SNicholas Bellinger 471cbf031f4SNicholas Bellinger static void target_xcopy_setup_pt_port( 472cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd, 473cbf031f4SNicholas Bellinger struct xcopy_op *xop, 474cbf031f4SNicholas Bellinger bool remote_port) 475cbf031f4SNicholas Bellinger { 476cbf031f4SNicholas Bellinger struct se_cmd *ec_cmd = xop->xop_se_cmd; 477cbf031f4SNicholas Bellinger struct se_cmd *pt_cmd = &xpt_cmd->se_cmd; 478cbf031f4SNicholas Bellinger 479cbf031f4SNicholas Bellinger if (xop->op_origin == XCOL_SOURCE_RECV_OP) { 480cbf031f4SNicholas Bellinger /* 481cbf031f4SNicholas Bellinger * Honor destination port reservations for X-COPY PUSH emulation 482cbf031f4SNicholas Bellinger * when CDB is received on local source port, and READs blocks to 483cbf031f4SNicholas Bellinger * WRITE on remote destination port. 484cbf031f4SNicholas Bellinger */ 485cbf031f4SNicholas Bellinger if (remote_port) { 486cbf031f4SNicholas Bellinger xpt_cmd->remote_port = remote_port; 487cbf031f4SNicholas Bellinger } else { 488cbf031f4SNicholas Bellinger pt_cmd->se_lun = ec_cmd->se_lun; 489cbf031f4SNicholas Bellinger pt_cmd->se_dev = ec_cmd->se_dev; 490cbf031f4SNicholas Bellinger 491cbf031f4SNicholas Bellinger pr_debug("Honoring local SRC port from ec_cmd->se_dev:" 492cbf031f4SNicholas Bellinger " %p\n", pt_cmd->se_dev); 493cbf031f4SNicholas Bellinger pt_cmd->se_lun = ec_cmd->se_lun; 494cbf031f4SNicholas Bellinger pr_debug("Honoring local SRC port from ec_cmd->se_lun: %p\n", 495cbf031f4SNicholas Bellinger pt_cmd->se_lun); 496cbf031f4SNicholas Bellinger } 497cbf031f4SNicholas Bellinger } else { 498cbf031f4SNicholas Bellinger /* 499cbf031f4SNicholas Bellinger * Honor source port reservation for X-COPY PULL emulation 500cbf031f4SNicholas Bellinger * when CDB is received on local desintation port, and READs 501cbf031f4SNicholas Bellinger * blocks from the remote source port to WRITE on local 502cbf031f4SNicholas Bellinger * destination port. 503cbf031f4SNicholas Bellinger */ 504cbf031f4SNicholas Bellinger if (remote_port) { 505cbf031f4SNicholas Bellinger xpt_cmd->remote_port = remote_port; 506cbf031f4SNicholas Bellinger } else { 507cbf031f4SNicholas Bellinger pt_cmd->se_lun = ec_cmd->se_lun; 508cbf031f4SNicholas Bellinger pt_cmd->se_dev = ec_cmd->se_dev; 509cbf031f4SNicholas Bellinger 510cbf031f4SNicholas Bellinger pr_debug("Honoring local DST port from ec_cmd->se_dev:" 511cbf031f4SNicholas Bellinger " %p\n", pt_cmd->se_dev); 512cbf031f4SNicholas Bellinger pt_cmd->se_lun = ec_cmd->se_lun; 513cbf031f4SNicholas Bellinger pr_debug("Honoring local DST port from ec_cmd->se_lun: %p\n", 514cbf031f4SNicholas Bellinger pt_cmd->se_lun); 515cbf031f4SNicholas Bellinger } 516cbf031f4SNicholas Bellinger } 517cbf031f4SNicholas Bellinger } 518cbf031f4SNicholas Bellinger 5192c336e3aSChristoph Hellwig static void target_xcopy_init_pt_lun(struct se_device *se_dev, 5202c336e3aSChristoph Hellwig struct se_cmd *pt_cmd, bool remote_port) 521cbf031f4SNicholas Bellinger { 522cbf031f4SNicholas Bellinger /* 523cbf031f4SNicholas Bellinger * Don't allocate + init an pt_cmd->se_lun if honoring local port for 524cbf031f4SNicholas Bellinger * reservations. The pt_cmd->se_lun pointer will be setup from within 525cbf031f4SNicholas Bellinger * target_xcopy_setup_pt_port() 526cbf031f4SNicholas Bellinger */ 5272c336e3aSChristoph Hellwig if (remote_port) { 5282c336e3aSChristoph Hellwig pr_debug("Setup emulated se_dev: %p from se_dev\n", 5292c336e3aSChristoph Hellwig pt_cmd->se_dev); 5304863e525SNicholas Bellinger pt_cmd->se_lun = &se_dev->xcopy_lun; 531cbf031f4SNicholas Bellinger pt_cmd->se_dev = se_dev; 5322c336e3aSChristoph Hellwig } 533cbf031f4SNicholas Bellinger 534c3d0a7c2SChristoph Hellwig pt_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; 535cbf031f4SNicholas Bellinger } 536cbf031f4SNicholas Bellinger 537cbf031f4SNicholas Bellinger static int target_xcopy_setup_pt_cmd( 538cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd, 539cbf031f4SNicholas Bellinger struct xcopy_op *xop, 540cbf031f4SNicholas Bellinger struct se_device *se_dev, 541cbf031f4SNicholas Bellinger unsigned char *cdb, 542cbf031f4SNicholas Bellinger bool remote_port, 543cbf031f4SNicholas Bellinger bool alloc_mem) 544cbf031f4SNicholas Bellinger { 545cbf031f4SNicholas Bellinger struct se_cmd *cmd = &xpt_cmd->se_cmd; 546cbf031f4SNicholas Bellinger sense_reason_t sense_rc; 547cbf031f4SNicholas Bellinger int ret = 0, rc; 548cbf031f4SNicholas Bellinger /* 549cbf031f4SNicholas Bellinger * Setup LUN+port to honor reservations based upon xop->op_origin for 550cbf031f4SNicholas Bellinger * X-COPY PUSH or X-COPY PULL based upon where the CDB was received. 551cbf031f4SNicholas Bellinger */ 5522c336e3aSChristoph Hellwig target_xcopy_init_pt_lun(se_dev, cmd, remote_port); 5532c336e3aSChristoph Hellwig 554cbf031f4SNicholas Bellinger xpt_cmd->xcopy_op = xop; 555cbf031f4SNicholas Bellinger target_xcopy_setup_pt_port(xpt_cmd, xop, remote_port); 556cbf031f4SNicholas Bellinger 557649ee054SBart Van Assche cmd->tag = 0; 558cbf031f4SNicholas Bellinger sense_rc = target_setup_cmd_from_cdb(cmd, cdb); 559cbf031f4SNicholas Bellinger if (sense_rc) { 560cbf031f4SNicholas Bellinger ret = -EINVAL; 561cbf031f4SNicholas Bellinger goto out; 562cbf031f4SNicholas Bellinger } 563cbf031f4SNicholas Bellinger 564cbf031f4SNicholas Bellinger if (alloc_mem) { 565cbf031f4SNicholas Bellinger rc = target_alloc_sgl(&cmd->t_data_sg, &cmd->t_data_nents, 566e64aa657SChristoph Hellwig cmd->data_length, false, false); 567cbf031f4SNicholas Bellinger if (rc < 0) { 568cbf031f4SNicholas Bellinger ret = rc; 569cbf031f4SNicholas Bellinger goto out; 570cbf031f4SNicholas Bellinger } 571cbf031f4SNicholas Bellinger /* 572cbf031f4SNicholas Bellinger * Set this bit so that transport_free_pages() allows the 573cbf031f4SNicholas Bellinger * caller to release SGLs + physical memory allocated by 574cbf031f4SNicholas Bellinger * transport_generic_get_mem().. 575cbf031f4SNicholas Bellinger */ 576cbf031f4SNicholas Bellinger cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; 577cbf031f4SNicholas Bellinger } else { 578cbf031f4SNicholas Bellinger /* 579cbf031f4SNicholas Bellinger * Here the previously allocated SGLs for the internal READ 580cbf031f4SNicholas Bellinger * are mapped zero-copy to the internal WRITE. 581cbf031f4SNicholas Bellinger */ 582cbf031f4SNicholas Bellinger sense_rc = transport_generic_map_mem_to_cmd(cmd, 583cbf031f4SNicholas Bellinger xop->xop_data_sg, xop->xop_data_nents, 584cbf031f4SNicholas Bellinger NULL, 0); 585cbf031f4SNicholas Bellinger if (sense_rc) { 586cbf031f4SNicholas Bellinger ret = -EINVAL; 587cbf031f4SNicholas Bellinger goto out; 588cbf031f4SNicholas Bellinger } 589cbf031f4SNicholas Bellinger 590cbf031f4SNicholas Bellinger pr_debug("Setup PASSTHROUGH_NOALLOC t_data_sg: %p t_data_nents:" 591cbf031f4SNicholas Bellinger " %u\n", cmd->t_data_sg, cmd->t_data_nents); 592cbf031f4SNicholas Bellinger } 593cbf031f4SNicholas Bellinger 594cbf031f4SNicholas Bellinger return 0; 595cbf031f4SNicholas Bellinger 596cbf031f4SNicholas Bellinger out: 597cbf031f4SNicholas Bellinger return ret; 598cbf031f4SNicholas Bellinger } 599cbf031f4SNicholas Bellinger 600cbf031f4SNicholas Bellinger static int target_xcopy_issue_pt_cmd(struct xcopy_pt_cmd *xpt_cmd) 601cbf031f4SNicholas Bellinger { 602cbf031f4SNicholas Bellinger struct se_cmd *se_cmd = &xpt_cmd->se_cmd; 603cbf031f4SNicholas Bellinger sense_reason_t sense_rc; 604cbf031f4SNicholas Bellinger 605cbf031f4SNicholas Bellinger sense_rc = transport_generic_new_cmd(se_cmd); 606cbf031f4SNicholas Bellinger if (sense_rc) 607cbf031f4SNicholas Bellinger return -EINVAL; 608cbf031f4SNicholas Bellinger 609cbf031f4SNicholas Bellinger if (se_cmd->data_direction == DMA_TO_DEVICE) 610cbf031f4SNicholas Bellinger target_execute_cmd(se_cmd); 611cbf031f4SNicholas Bellinger 612cbf031f4SNicholas Bellinger wait_for_completion_interruptible(&xpt_cmd->xpt_passthrough_sem); 613cbf031f4SNicholas Bellinger 614cbf031f4SNicholas Bellinger pr_debug("target_xcopy_issue_pt_cmd(): SCSI status: 0x%02x\n", 615cbf031f4SNicholas Bellinger se_cmd->scsi_status); 6168a955d6dSNicholas Bellinger 6178a955d6dSNicholas Bellinger return (se_cmd->scsi_status) ? -EINVAL : 0; 618cbf031f4SNicholas Bellinger } 619cbf031f4SNicholas Bellinger 620cbf031f4SNicholas Bellinger static int target_xcopy_read_source( 621cbf031f4SNicholas Bellinger struct se_cmd *ec_cmd, 622cbf031f4SNicholas Bellinger struct xcopy_op *xop, 623cbf031f4SNicholas Bellinger struct se_device *src_dev, 624cbf031f4SNicholas Bellinger sector_t src_lba, 625cbf031f4SNicholas Bellinger u32 src_sectors) 626cbf031f4SNicholas Bellinger { 627cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd; 628cbf031f4SNicholas Bellinger struct se_cmd *se_cmd; 629cbf031f4SNicholas Bellinger u32 length = (src_sectors * src_dev->dev_attrib.block_size); 630cbf031f4SNicholas Bellinger int rc; 631cbf031f4SNicholas Bellinger unsigned char cdb[16]; 632cbf031f4SNicholas Bellinger bool remote_port = (xop->op_origin == XCOL_DEST_RECV_OP); 633cbf031f4SNicholas Bellinger 634cbf031f4SNicholas Bellinger xpt_cmd = kzalloc(sizeof(struct xcopy_pt_cmd), GFP_KERNEL); 635cbf031f4SNicholas Bellinger if (!xpt_cmd) { 636cbf031f4SNicholas Bellinger pr_err("Unable to allocate xcopy_pt_cmd\n"); 637cbf031f4SNicholas Bellinger return -ENOMEM; 638cbf031f4SNicholas Bellinger } 639cbf031f4SNicholas Bellinger init_completion(&xpt_cmd->xpt_passthrough_sem); 640cbf031f4SNicholas Bellinger se_cmd = &xpt_cmd->se_cmd; 641cbf031f4SNicholas Bellinger 642cbf031f4SNicholas Bellinger memset(&cdb[0], 0, 16); 643cbf031f4SNicholas Bellinger cdb[0] = READ_16; 644cbf031f4SNicholas Bellinger put_unaligned_be64(src_lba, &cdb[2]); 645cbf031f4SNicholas Bellinger put_unaligned_be32(src_sectors, &cdb[10]); 646cbf031f4SNicholas Bellinger pr_debug("XCOPY: Built READ_16: LBA: %llu Sectors: %u Length: %u\n", 647cbf031f4SNicholas Bellinger (unsigned long long)src_lba, src_sectors, length); 648cbf031f4SNicholas Bellinger 6494416f89bSNicholas Bellinger transport_init_se_cmd(se_cmd, &xcopy_pt_tfo, &xcopy_pt_sess, length, 650366bda19SNicholas Bellinger DMA_FROM_DEVICE, 0, &xpt_cmd->sense_buffer[0]); 651cbf031f4SNicholas Bellinger xop->src_pt_cmd = xpt_cmd; 652cbf031f4SNicholas Bellinger 653cbf031f4SNicholas Bellinger rc = target_xcopy_setup_pt_cmd(xpt_cmd, xop, src_dev, &cdb[0], 654cbf031f4SNicholas Bellinger remote_port, true); 655cbf031f4SNicholas Bellinger if (rc < 0) { 656cbf031f4SNicholas Bellinger transport_generic_free_cmd(se_cmd, 0); 657cbf031f4SNicholas Bellinger return rc; 658cbf031f4SNicholas Bellinger } 659cbf031f4SNicholas Bellinger 660cbf031f4SNicholas Bellinger xop->xop_data_sg = se_cmd->t_data_sg; 661cbf031f4SNicholas Bellinger xop->xop_data_nents = se_cmd->t_data_nents; 662cbf031f4SNicholas Bellinger pr_debug("XCOPY-READ: Saved xop->xop_data_sg: %p, num: %u for READ" 663cbf031f4SNicholas Bellinger " memory\n", xop->xop_data_sg, xop->xop_data_nents); 664cbf031f4SNicholas Bellinger 665cbf031f4SNicholas Bellinger rc = target_xcopy_issue_pt_cmd(xpt_cmd); 666cbf031f4SNicholas Bellinger if (rc < 0) { 667cbf031f4SNicholas Bellinger transport_generic_free_cmd(se_cmd, 0); 668cbf031f4SNicholas Bellinger return rc; 669cbf031f4SNicholas Bellinger } 670cbf031f4SNicholas Bellinger /* 671cbf031f4SNicholas Bellinger * Clear off the allocated t_data_sg, that has been saved for 672cbf031f4SNicholas Bellinger * zero-copy WRITE submission reuse in struct xcopy_op.. 673cbf031f4SNicholas Bellinger */ 674cbf031f4SNicholas Bellinger se_cmd->t_data_sg = NULL; 675cbf031f4SNicholas Bellinger se_cmd->t_data_nents = 0; 676cbf031f4SNicholas Bellinger 677cbf031f4SNicholas Bellinger return 0; 678cbf031f4SNicholas Bellinger } 679cbf031f4SNicholas Bellinger 680cbf031f4SNicholas Bellinger static int target_xcopy_write_destination( 681cbf031f4SNicholas Bellinger struct se_cmd *ec_cmd, 682cbf031f4SNicholas Bellinger struct xcopy_op *xop, 683cbf031f4SNicholas Bellinger struct se_device *dst_dev, 684cbf031f4SNicholas Bellinger sector_t dst_lba, 685cbf031f4SNicholas Bellinger u32 dst_sectors) 686cbf031f4SNicholas Bellinger { 687cbf031f4SNicholas Bellinger struct xcopy_pt_cmd *xpt_cmd; 688cbf031f4SNicholas Bellinger struct se_cmd *se_cmd; 689cbf031f4SNicholas Bellinger u32 length = (dst_sectors * dst_dev->dev_attrib.block_size); 690cbf031f4SNicholas Bellinger int rc; 691cbf031f4SNicholas Bellinger unsigned char cdb[16]; 692cbf031f4SNicholas Bellinger bool remote_port = (xop->op_origin == XCOL_SOURCE_RECV_OP); 693cbf031f4SNicholas Bellinger 694cbf031f4SNicholas Bellinger xpt_cmd = kzalloc(sizeof(struct xcopy_pt_cmd), GFP_KERNEL); 695cbf031f4SNicholas Bellinger if (!xpt_cmd) { 696cbf031f4SNicholas Bellinger pr_err("Unable to allocate xcopy_pt_cmd\n"); 697cbf031f4SNicholas Bellinger return -ENOMEM; 698cbf031f4SNicholas Bellinger } 699cbf031f4SNicholas Bellinger init_completion(&xpt_cmd->xpt_passthrough_sem); 700cbf031f4SNicholas Bellinger se_cmd = &xpt_cmd->se_cmd; 701cbf031f4SNicholas Bellinger 702cbf031f4SNicholas Bellinger memset(&cdb[0], 0, 16); 703cbf031f4SNicholas Bellinger cdb[0] = WRITE_16; 704cbf031f4SNicholas Bellinger put_unaligned_be64(dst_lba, &cdb[2]); 705cbf031f4SNicholas Bellinger put_unaligned_be32(dst_sectors, &cdb[10]); 706cbf031f4SNicholas Bellinger pr_debug("XCOPY: Built WRITE_16: LBA: %llu Sectors: %u Length: %u\n", 707cbf031f4SNicholas Bellinger (unsigned long long)dst_lba, dst_sectors, length); 708cbf031f4SNicholas Bellinger 7094416f89bSNicholas Bellinger transport_init_se_cmd(se_cmd, &xcopy_pt_tfo, &xcopy_pt_sess, length, 710366bda19SNicholas Bellinger DMA_TO_DEVICE, 0, &xpt_cmd->sense_buffer[0]); 711cbf031f4SNicholas Bellinger xop->dst_pt_cmd = xpt_cmd; 712cbf031f4SNicholas Bellinger 713cbf031f4SNicholas Bellinger rc = target_xcopy_setup_pt_cmd(xpt_cmd, xop, dst_dev, &cdb[0], 714cbf031f4SNicholas Bellinger remote_port, false); 715cbf031f4SNicholas Bellinger if (rc < 0) { 716cbf031f4SNicholas Bellinger struct se_cmd *src_cmd = &xop->src_pt_cmd->se_cmd; 717cbf031f4SNicholas Bellinger /* 718cbf031f4SNicholas Bellinger * If the failure happened before the t_mem_list hand-off in 719cbf031f4SNicholas Bellinger * target_xcopy_setup_pt_cmd(), Reset memory + clear flag so that 720cbf031f4SNicholas Bellinger * core releases this memory on error during X-COPY WRITE I/O. 721cbf031f4SNicholas Bellinger */ 722cbf031f4SNicholas Bellinger src_cmd->se_cmd_flags &= ~SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; 723cbf031f4SNicholas Bellinger src_cmd->t_data_sg = xop->xop_data_sg; 724cbf031f4SNicholas Bellinger src_cmd->t_data_nents = xop->xop_data_nents; 725cbf031f4SNicholas Bellinger 726cbf031f4SNicholas Bellinger transport_generic_free_cmd(se_cmd, 0); 727cbf031f4SNicholas Bellinger return rc; 728cbf031f4SNicholas Bellinger } 729cbf031f4SNicholas Bellinger 730cbf031f4SNicholas Bellinger rc = target_xcopy_issue_pt_cmd(xpt_cmd); 731cbf031f4SNicholas Bellinger if (rc < 0) { 732cbf031f4SNicholas Bellinger se_cmd->se_cmd_flags &= ~SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; 733cbf031f4SNicholas Bellinger transport_generic_free_cmd(se_cmd, 0); 734cbf031f4SNicholas Bellinger return rc; 735cbf031f4SNicholas Bellinger } 736cbf031f4SNicholas Bellinger 737cbf031f4SNicholas Bellinger return 0; 738cbf031f4SNicholas Bellinger } 739cbf031f4SNicholas Bellinger 740cbf031f4SNicholas Bellinger static void target_xcopy_do_work(struct work_struct *work) 741cbf031f4SNicholas Bellinger { 742cbf031f4SNicholas Bellinger struct xcopy_op *xop = container_of(work, struct xcopy_op, xop_work); 743cbf031f4SNicholas Bellinger struct se_device *src_dev = xop->src_dev, *dst_dev = xop->dst_dev; 744cbf031f4SNicholas Bellinger struct se_cmd *ec_cmd = xop->xop_se_cmd; 745cbf031f4SNicholas Bellinger sector_t src_lba = xop->src_lba, dst_lba = xop->dst_lba, end_lba; 746cbf031f4SNicholas Bellinger unsigned int max_sectors; 747cbf031f4SNicholas Bellinger int rc; 748cbf031f4SNicholas Bellinger unsigned short nolb = xop->nolb, cur_nolb, max_nolb, copied_nolb = 0; 749cbf031f4SNicholas Bellinger 750cbf031f4SNicholas Bellinger end_lba = src_lba + nolb; 751cbf031f4SNicholas Bellinger /* 752cbf031f4SNicholas Bellinger * Break up XCOPY I/O into hw_max_sectors sized I/O based on the 753cbf031f4SNicholas Bellinger * smallest max_sectors between src_dev + dev_dev, or 754cbf031f4SNicholas Bellinger */ 755cbf031f4SNicholas Bellinger max_sectors = min(src_dev->dev_attrib.hw_max_sectors, 756cbf031f4SNicholas Bellinger dst_dev->dev_attrib.hw_max_sectors); 757cbf031f4SNicholas Bellinger max_sectors = min_t(u32, max_sectors, XCOPY_MAX_SECTORS); 758cbf031f4SNicholas Bellinger 759cbf031f4SNicholas Bellinger max_nolb = min_t(u16, max_sectors, ((u16)(~0U))); 760cbf031f4SNicholas Bellinger 761cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: nolb: %hu, max_nolb: %hu end_lba: %llu\n", 762cbf031f4SNicholas Bellinger nolb, max_nolb, (unsigned long long)end_lba); 763cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Starting src_lba: %llu, dst_lba: %llu\n", 764cbf031f4SNicholas Bellinger (unsigned long long)src_lba, (unsigned long long)dst_lba); 765cbf031f4SNicholas Bellinger 766cbf031f4SNicholas Bellinger while (src_lba < end_lba) { 767cbf031f4SNicholas Bellinger cur_nolb = min(nolb, max_nolb); 768cbf031f4SNicholas Bellinger 769cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Calling read src_dev: %p src_lba: %llu," 770cbf031f4SNicholas Bellinger " cur_nolb: %hu\n", src_dev, (unsigned long long)src_lba, cur_nolb); 771cbf031f4SNicholas Bellinger 772cbf031f4SNicholas Bellinger rc = target_xcopy_read_source(ec_cmd, xop, src_dev, src_lba, cur_nolb); 773cbf031f4SNicholas Bellinger if (rc < 0) 774cbf031f4SNicholas Bellinger goto out; 775cbf031f4SNicholas Bellinger 776cbf031f4SNicholas Bellinger src_lba += cur_nolb; 777cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Incremented READ src_lba to %llu\n", 778cbf031f4SNicholas Bellinger (unsigned long long)src_lba); 779cbf031f4SNicholas Bellinger 780cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Calling write dst_dev: %p dst_lba: %llu," 781cbf031f4SNicholas Bellinger " cur_nolb: %hu\n", dst_dev, (unsigned long long)dst_lba, cur_nolb); 782cbf031f4SNicholas Bellinger 783cbf031f4SNicholas Bellinger rc = target_xcopy_write_destination(ec_cmd, xop, dst_dev, 784cbf031f4SNicholas Bellinger dst_lba, cur_nolb); 785cbf031f4SNicholas Bellinger if (rc < 0) { 786cbf031f4SNicholas Bellinger transport_generic_free_cmd(&xop->src_pt_cmd->se_cmd, 0); 787cbf031f4SNicholas Bellinger goto out; 788cbf031f4SNicholas Bellinger } 789cbf031f4SNicholas Bellinger 790cbf031f4SNicholas Bellinger dst_lba += cur_nolb; 791cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Incremented WRITE dst_lba to %llu\n", 792cbf031f4SNicholas Bellinger (unsigned long long)dst_lba); 793cbf031f4SNicholas Bellinger 794cbf031f4SNicholas Bellinger copied_nolb += cur_nolb; 795cbf031f4SNicholas Bellinger nolb -= cur_nolb; 796cbf031f4SNicholas Bellinger 797cbf031f4SNicholas Bellinger transport_generic_free_cmd(&xop->src_pt_cmd->se_cmd, 0); 798cbf031f4SNicholas Bellinger xop->dst_pt_cmd->se_cmd.se_cmd_flags &= ~SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; 799cbf031f4SNicholas Bellinger 800cbf031f4SNicholas Bellinger transport_generic_free_cmd(&xop->dst_pt_cmd->se_cmd, 0); 801cbf031f4SNicholas Bellinger } 802cbf031f4SNicholas Bellinger 803cbf031f4SNicholas Bellinger xcopy_pt_undepend_remotedev(xop); 804cbf031f4SNicholas Bellinger kfree(xop); 805cbf031f4SNicholas Bellinger 806cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Final src_lba: %llu, dst_lba: %llu\n", 807cbf031f4SNicholas Bellinger (unsigned long long)src_lba, (unsigned long long)dst_lba); 808cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Blocks copied: %hu, Bytes Copied: %u\n", 809cbf031f4SNicholas Bellinger copied_nolb, copied_nolb * dst_dev->dev_attrib.block_size); 810cbf031f4SNicholas Bellinger 811cbf031f4SNicholas Bellinger pr_debug("target_xcopy_do_work: Setting X-COPY GOOD status -> sending response\n"); 812cbf031f4SNicholas Bellinger target_complete_cmd(ec_cmd, SAM_STAT_GOOD); 813cbf031f4SNicholas Bellinger return; 814cbf031f4SNicholas Bellinger 815cbf031f4SNicholas Bellinger out: 816cbf031f4SNicholas Bellinger xcopy_pt_undepend_remotedev(xop); 817cbf031f4SNicholas Bellinger kfree(xop); 818cbf031f4SNicholas Bellinger 819cbf031f4SNicholas Bellinger pr_warn("target_xcopy_do_work: Setting X-COPY CHECK_CONDITION -> sending response\n"); 820cbf031f4SNicholas Bellinger ec_cmd->scsi_status = SAM_STAT_CHECK_CONDITION; 821cbf031f4SNicholas Bellinger target_complete_cmd(ec_cmd, SAM_STAT_CHECK_CONDITION); 822cbf031f4SNicholas Bellinger } 823cbf031f4SNicholas Bellinger 824cbf031f4SNicholas Bellinger sense_reason_t target_do_xcopy(struct se_cmd *se_cmd) 825cbf031f4SNicholas Bellinger { 826acb3f260SNicholas Bellinger struct se_device *dev = se_cmd->se_dev; 827cbf031f4SNicholas Bellinger struct xcopy_op *xop = NULL; 828cbf031f4SNicholas Bellinger unsigned char *p = NULL, *seg_desc; 829cbf031f4SNicholas Bellinger unsigned int list_id, list_id_usage, sdll, inline_dl, sa; 83048502ddbSNicholas Bellinger sense_reason_t ret = TCM_INVALID_PARAMETER_LIST; 831cbf031f4SNicholas Bellinger int rc; 832cbf031f4SNicholas Bellinger unsigned short tdll; 833cbf031f4SNicholas Bellinger 834acb3f260SNicholas Bellinger if (!dev->dev_attrib.emulate_3pc) { 835acb3f260SNicholas Bellinger pr_err("EXTENDED_COPY operation explicitly disabled\n"); 836acb3f260SNicholas Bellinger return TCM_UNSUPPORTED_SCSI_OPCODE; 837acb3f260SNicholas Bellinger } 838acb3f260SNicholas Bellinger 839cbf031f4SNicholas Bellinger sa = se_cmd->t_task_cdb[1] & 0x1f; 840cbf031f4SNicholas Bellinger if (sa != 0x00) { 841cbf031f4SNicholas Bellinger pr_err("EXTENDED_COPY(LID4) not supported\n"); 842cbf031f4SNicholas Bellinger return TCM_UNSUPPORTED_SCSI_OPCODE; 843cbf031f4SNicholas Bellinger } 844cbf031f4SNicholas Bellinger 845934a138eSNicholas Bellinger xop = kzalloc(sizeof(struct xcopy_op), GFP_KERNEL); 846934a138eSNicholas Bellinger if (!xop) { 847934a138eSNicholas Bellinger pr_err("Unable to allocate xcopy_op\n"); 848934a138eSNicholas Bellinger return TCM_OUT_OF_RESOURCES; 849934a138eSNicholas Bellinger } 850934a138eSNicholas Bellinger xop->xop_se_cmd = se_cmd; 851934a138eSNicholas Bellinger 852cbf031f4SNicholas Bellinger p = transport_kmap_data_sg(se_cmd); 853cbf031f4SNicholas Bellinger if (!p) { 854cbf031f4SNicholas Bellinger pr_err("transport_kmap_data_sg() failed in target_do_xcopy\n"); 855934a138eSNicholas Bellinger kfree(xop); 856cbf031f4SNicholas Bellinger return TCM_OUT_OF_RESOURCES; 857cbf031f4SNicholas Bellinger } 858cbf031f4SNicholas Bellinger 859cbf031f4SNicholas Bellinger list_id = p[0]; 8603f7a46c6SNicholas Bellinger list_id_usage = (p[1] & 0x18) >> 3; 8613f7a46c6SNicholas Bellinger 862cbf031f4SNicholas Bellinger /* 863cbf031f4SNicholas Bellinger * Determine TARGET DESCRIPTOR LIST LENGTH + SEGMENT DESCRIPTOR LIST LENGTH 864cbf031f4SNicholas Bellinger */ 865cbf031f4SNicholas Bellinger tdll = get_unaligned_be16(&p[2]); 866cbf031f4SNicholas Bellinger sdll = get_unaligned_be32(&p[8]); 867cbf031f4SNicholas Bellinger 868cbf031f4SNicholas Bellinger inline_dl = get_unaligned_be32(&p[12]); 869cbf031f4SNicholas Bellinger if (inline_dl != 0) { 870cbf031f4SNicholas Bellinger pr_err("XCOPY with non zero inline data length\n"); 871cbf031f4SNicholas Bellinger goto out; 872cbf031f4SNicholas Bellinger } 873cbf031f4SNicholas Bellinger 874cbf031f4SNicholas Bellinger pr_debug("Processing XCOPY with list_id: 0x%02x list_id_usage: 0x%02x" 875cbf031f4SNicholas Bellinger " tdll: %hu sdll: %u inline_dl: %u\n", list_id, list_id_usage, 876cbf031f4SNicholas Bellinger tdll, sdll, inline_dl); 877cbf031f4SNicholas Bellinger 878cbf031f4SNicholas Bellinger rc = target_xcopy_parse_target_descriptors(se_cmd, xop, &p[16], tdll); 879cbf031f4SNicholas Bellinger if (rc <= 0) 880cbf031f4SNicholas Bellinger goto out; 881cbf031f4SNicholas Bellinger 88248502ddbSNicholas Bellinger if (xop->src_dev->dev_attrib.block_size != 88348502ddbSNicholas Bellinger xop->dst_dev->dev_attrib.block_size) { 88448502ddbSNicholas Bellinger pr_err("XCOPY: Non matching src_dev block_size: %u + dst_dev" 88548502ddbSNicholas Bellinger " block_size: %u currently unsupported\n", 88648502ddbSNicholas Bellinger xop->src_dev->dev_attrib.block_size, 88748502ddbSNicholas Bellinger xop->dst_dev->dev_attrib.block_size); 88848502ddbSNicholas Bellinger xcopy_pt_undepend_remotedev(xop); 88948502ddbSNicholas Bellinger ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; 89048502ddbSNicholas Bellinger goto out; 89148502ddbSNicholas Bellinger } 89248502ddbSNicholas Bellinger 893cbf031f4SNicholas Bellinger pr_debug("XCOPY: Processed %d target descriptors, length: %u\n", rc, 894cbf031f4SNicholas Bellinger rc * XCOPY_TARGET_DESC_LEN); 895cbf031f4SNicholas Bellinger seg_desc = &p[16]; 896cbf031f4SNicholas Bellinger seg_desc += (rc * XCOPY_TARGET_DESC_LEN); 897cbf031f4SNicholas Bellinger 898cbf031f4SNicholas Bellinger rc = target_xcopy_parse_segment_descriptors(se_cmd, xop, seg_desc, sdll); 899cbf031f4SNicholas Bellinger if (rc <= 0) { 900cbf031f4SNicholas Bellinger xcopy_pt_undepend_remotedev(xop); 901cbf031f4SNicholas Bellinger goto out; 902cbf031f4SNicholas Bellinger } 903cbf031f4SNicholas Bellinger transport_kunmap_data_sg(se_cmd); 904cbf031f4SNicholas Bellinger 905cbf031f4SNicholas Bellinger pr_debug("XCOPY: Processed %d segment descriptors, length: %u\n", rc, 906cbf031f4SNicholas Bellinger rc * XCOPY_SEGMENT_DESC_LEN); 907cbf031f4SNicholas Bellinger INIT_WORK(&xop->xop_work, target_xcopy_do_work); 908cbf031f4SNicholas Bellinger queue_work(xcopy_wq, &xop->xop_work); 909cbf031f4SNicholas Bellinger return TCM_NO_SENSE; 910cbf031f4SNicholas Bellinger 911cbf031f4SNicholas Bellinger out: 912cbf031f4SNicholas Bellinger if (p) 913cbf031f4SNicholas Bellinger transport_kunmap_data_sg(se_cmd); 914cbf031f4SNicholas Bellinger kfree(xop); 91548502ddbSNicholas Bellinger return ret; 916cbf031f4SNicholas Bellinger } 917cbf031f4SNicholas Bellinger 918cbf031f4SNicholas Bellinger static sense_reason_t target_rcr_operating_parameters(struct se_cmd *se_cmd) 919cbf031f4SNicholas Bellinger { 920cbf031f4SNicholas Bellinger unsigned char *p; 921cbf031f4SNicholas Bellinger 922cbf031f4SNicholas Bellinger p = transport_kmap_data_sg(se_cmd); 923cbf031f4SNicholas Bellinger if (!p) { 924cbf031f4SNicholas Bellinger pr_err("transport_kmap_data_sg failed in" 925cbf031f4SNicholas Bellinger " target_rcr_operating_parameters\n"); 926cbf031f4SNicholas Bellinger return TCM_OUT_OF_RESOURCES; 927cbf031f4SNicholas Bellinger } 928cbf031f4SNicholas Bellinger 929cbf031f4SNicholas Bellinger if (se_cmd->data_length < 54) { 930cbf031f4SNicholas Bellinger pr_err("Receive Copy Results Op Parameters length" 931cbf031f4SNicholas Bellinger " too small: %u\n", se_cmd->data_length); 932cbf031f4SNicholas Bellinger transport_kunmap_data_sg(se_cmd); 933cbf031f4SNicholas Bellinger return TCM_INVALID_CDB_FIELD; 934cbf031f4SNicholas Bellinger } 935cbf031f4SNicholas Bellinger /* 936cbf031f4SNicholas Bellinger * Set SNLID=1 (Supports no List ID) 937cbf031f4SNicholas Bellinger */ 938cbf031f4SNicholas Bellinger p[4] = 0x1; 939cbf031f4SNicholas Bellinger /* 940cbf031f4SNicholas Bellinger * MAXIMUM TARGET DESCRIPTOR COUNT 941cbf031f4SNicholas Bellinger */ 942cbf031f4SNicholas Bellinger put_unaligned_be16(RCR_OP_MAX_TARGET_DESC_COUNT, &p[8]); 943cbf031f4SNicholas Bellinger /* 944cbf031f4SNicholas Bellinger * MAXIMUM SEGMENT DESCRIPTOR COUNT 945cbf031f4SNicholas Bellinger */ 946cbf031f4SNicholas Bellinger put_unaligned_be16(RCR_OP_MAX_SG_DESC_COUNT, &p[10]); 947cbf031f4SNicholas Bellinger /* 948cbf031f4SNicholas Bellinger * MAXIMUM DESCRIPTOR LIST LENGTH 949cbf031f4SNicholas Bellinger */ 950cbf031f4SNicholas Bellinger put_unaligned_be32(RCR_OP_MAX_DESC_LIST_LEN, &p[12]); 951cbf031f4SNicholas Bellinger /* 952cbf031f4SNicholas Bellinger * MAXIMUM SEGMENT LENGTH 953cbf031f4SNicholas Bellinger */ 954cbf031f4SNicholas Bellinger put_unaligned_be32(RCR_OP_MAX_SEGMENT_LEN, &p[16]); 955cbf031f4SNicholas Bellinger /* 956cbf031f4SNicholas Bellinger * MAXIMUM INLINE DATA LENGTH for SA 0x04 (NOT SUPPORTED) 957cbf031f4SNicholas Bellinger */ 958cbf031f4SNicholas Bellinger put_unaligned_be32(0x0, &p[20]); 959cbf031f4SNicholas Bellinger /* 960cbf031f4SNicholas Bellinger * HELD DATA LIMIT 961cbf031f4SNicholas Bellinger */ 962cbf031f4SNicholas Bellinger put_unaligned_be32(0x0, &p[24]); 963cbf031f4SNicholas Bellinger /* 964cbf031f4SNicholas Bellinger * MAXIMUM STREAM DEVICE TRANSFER SIZE 965cbf031f4SNicholas Bellinger */ 966cbf031f4SNicholas Bellinger put_unaligned_be32(0x0, &p[28]); 967cbf031f4SNicholas Bellinger /* 968cbf031f4SNicholas Bellinger * TOTAL CONCURRENT COPIES 969cbf031f4SNicholas Bellinger */ 970cbf031f4SNicholas Bellinger put_unaligned_be16(RCR_OP_TOTAL_CONCURR_COPIES, &p[34]); 971cbf031f4SNicholas Bellinger /* 972cbf031f4SNicholas Bellinger * MAXIMUM CONCURRENT COPIES 973cbf031f4SNicholas Bellinger */ 974cbf031f4SNicholas Bellinger p[36] = RCR_OP_MAX_CONCURR_COPIES; 975cbf031f4SNicholas Bellinger /* 976cbf031f4SNicholas Bellinger * DATA SEGMENT GRANULARITY (log 2) 977cbf031f4SNicholas Bellinger */ 978cbf031f4SNicholas Bellinger p[37] = RCR_OP_DATA_SEG_GRAN_LOG2; 979cbf031f4SNicholas Bellinger /* 980cbf031f4SNicholas Bellinger * INLINE DATA GRANULARITY log 2) 981cbf031f4SNicholas Bellinger */ 982cbf031f4SNicholas Bellinger p[38] = RCR_OP_INLINE_DATA_GRAN_LOG2; 983cbf031f4SNicholas Bellinger /* 984cbf031f4SNicholas Bellinger * HELD DATA GRANULARITY 985cbf031f4SNicholas Bellinger */ 986cbf031f4SNicholas Bellinger p[39] = RCR_OP_HELD_DATA_GRAN_LOG2; 987cbf031f4SNicholas Bellinger /* 988cbf031f4SNicholas Bellinger * IMPLEMENTED DESCRIPTOR LIST LENGTH 989cbf031f4SNicholas Bellinger */ 990cbf031f4SNicholas Bellinger p[43] = 0x2; 991cbf031f4SNicholas Bellinger /* 992cbf031f4SNicholas Bellinger * List of implemented descriptor type codes (ordered) 993cbf031f4SNicholas Bellinger */ 994cbf031f4SNicholas Bellinger p[44] = 0x02; /* Copy Block to Block device */ 995cbf031f4SNicholas Bellinger p[45] = 0xe4; /* Identification descriptor target descriptor */ 996cbf031f4SNicholas Bellinger 997cbf031f4SNicholas Bellinger /* 998cbf031f4SNicholas Bellinger * AVAILABLE DATA (n-3) 999cbf031f4SNicholas Bellinger */ 1000cbf031f4SNicholas Bellinger put_unaligned_be32(42, &p[0]); 1001cbf031f4SNicholas Bellinger 1002cbf031f4SNicholas Bellinger transport_kunmap_data_sg(se_cmd); 1003cbf031f4SNicholas Bellinger target_complete_cmd(se_cmd, GOOD); 1004cbf031f4SNicholas Bellinger 1005cbf031f4SNicholas Bellinger return TCM_NO_SENSE; 1006cbf031f4SNicholas Bellinger } 1007cbf031f4SNicholas Bellinger 1008cbf031f4SNicholas Bellinger sense_reason_t target_do_receive_copy_results(struct se_cmd *se_cmd) 1009cbf031f4SNicholas Bellinger { 1010cbf031f4SNicholas Bellinger unsigned char *cdb = &se_cmd->t_task_cdb[0]; 1011cbf031f4SNicholas Bellinger int sa = (cdb[1] & 0x1f), list_id = cdb[2]; 1012cbf031f4SNicholas Bellinger sense_reason_t rc = TCM_NO_SENSE; 1013cbf031f4SNicholas Bellinger 1014cbf031f4SNicholas Bellinger pr_debug("Entering target_do_receive_copy_results: SA: 0x%02x, List ID:" 1015cbf031f4SNicholas Bellinger " 0x%02x, AL: %u\n", sa, list_id, se_cmd->data_length); 1016cbf031f4SNicholas Bellinger 1017cbf031f4SNicholas Bellinger if (list_id != 0) { 1018cbf031f4SNicholas Bellinger pr_err("Receive Copy Results with non zero list identifier" 1019cbf031f4SNicholas Bellinger " not supported\n"); 1020cbf031f4SNicholas Bellinger return TCM_INVALID_CDB_FIELD; 1021cbf031f4SNicholas Bellinger } 1022cbf031f4SNicholas Bellinger 1023cbf031f4SNicholas Bellinger switch (sa) { 1024cbf031f4SNicholas Bellinger case RCR_SA_OPERATING_PARAMETERS: 1025cbf031f4SNicholas Bellinger rc = target_rcr_operating_parameters(se_cmd); 1026cbf031f4SNicholas Bellinger break; 1027cbf031f4SNicholas Bellinger case RCR_SA_COPY_STATUS: 1028cbf031f4SNicholas Bellinger case RCR_SA_RECEIVE_DATA: 1029cbf031f4SNicholas Bellinger case RCR_SA_FAILED_SEGMENT_DETAILS: 1030cbf031f4SNicholas Bellinger default: 1031cbf031f4SNicholas Bellinger pr_err("Unsupported SA for receive copy results: 0x%02x\n", sa); 1032cbf031f4SNicholas Bellinger return TCM_INVALID_CDB_FIELD; 1033cbf031f4SNicholas Bellinger } 1034cbf031f4SNicholas Bellinger 1035cbf031f4SNicholas Bellinger return rc; 1036cbf031f4SNicholas Bellinger } 1037