b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * CDDL HEADER START
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * The contents of this file are subject to the terms of the
36c5fee33fa8b822175d410202aebcf592c8d342mcneal * Common Development and Distribution License (the "License").
36c5fee33fa8b822175d410202aebcf592c8d342mcneal * You may not use this file except in compliance with the License.
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * See the License for the specific language governing permissions
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * and limitations under the License.
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * When distributing Covered Code, include this CDDL HEADER in each
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * If applicable, add the following below this CDDL HEADER, with the
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * fields enclosed by brackets "[]" replaced with your own identifying
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * information: Portions Copyright [yyyy] [name of copyright owner]
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * CDDL HEADER END
d3d50737e566cade9a08d73d2af95105ac7cd960Rafael Vanoni * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * Use is subject to license terms.
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * pseudo scsi disk driver
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * Mode sense/select page control
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * Byte conversion macros
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * struct prop_map
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * This structure maps a property name to the place to store its value.
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * Some interesting statistics. These are protected by the
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * emul64_stats_mutex. It would be nice to have an ioctl to print them out,
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * but we don't have the development time for that now. You can at least
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * look at them with adb.
b1dd958f54f8bfa984d306bb8ca8264855761d7bcthint emul64_collect_stats = 1; /* Collect stats if non-zero */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcthkmutex_t emul64_stats_mutex; /* Protect these variables */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcthlong emul64_nowrite_count = 0; /* # active nowrite ranges */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcthstatic uint64_t emul64_skipped_io = 0; /* Skipped I/O operations, because of */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth /* EMUL64_WRITE_OFF. */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcthstatic uint64_t emul64_skipped_blk = 0; /* Skipped blocks because of */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth /* EMUL64_WRITE_OFF. */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcthstatic uint64_t emul64_io_ops = 0; /* Total number of I/O operations */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth /* including skipped and actual. */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcthstatic uint64_t emul64_io_blocks = 0; /* Total number of blocks involved */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth /* in I/O operations. */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcthstatic uint64_t emul64_nonzero = 0; /* Number of non-zero data blocks */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth /* currently held in memory */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcthstatic uint64_t emul64_max_list_length = 0; /* Maximum size of a linked */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth /* list of non-zero blocks. */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcthuint64_t emul64_taskq_max = 0; /* emul64_scsi_start uses the taskq */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth /* mechanism to dispatch work. */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth /* If the number of entries in the */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth /* exceeds the maximum for the queue */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth /* the queue a 1 second delay is */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth /* encountered in taskq_ent_alloc. */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth /* This counter counts the number */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth /* times that this happens. */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * Since emul64 does no physical I/O, operations that would normally be I/O
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * intensive become CPU bound. An example of this is RAID 5
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * initialization. When the kernel becomes CPU bound, it looks as if the
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * machine is hung.
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * To avoid this problem, we provide a function, emul64_yield_check, that does a
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * delay from time to time to yield up the CPU. The following variables
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * are tunables for this algorithm.
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * emul64_num_delay_called Number of times we called delay. This is
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * not really a tunable. Rather it is a
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * counter that provides useful information
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * for adjusting the tunables.
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * emul64_yield_length Number of microseconds to yield the CPU.
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * emul64_yield_period Number of I/O operations between yields.
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * emul64_yield_enable emul64 will yield the CPU, only if this
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * variable contains a non-zero value. This
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * allows the yield functionality to be turned
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * off for experimentation purposes.
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * The value of 1000 for emul64_yield_period has been determined by
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * experience with running the tests.
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * This array establishes a set of tunable variables that can be set by
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * defining properties in the emul64.conf file.
b1dd958f54f8bfa984d306bb8ca8264855761d7bcthstatic unsigned char *emul64_zeros = NULL; /* Block of 0s for comparison */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcthextern void emul64_check_cond(struct scsi_pkt *pkt, uchar_t key,
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth/* ncyl=250000 acyl=2 nhead=24 nsect=357 */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcthstatic int bsd_mode_sense_dad_mode_geometry(struct scsi_pkt *);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcthstatic int bsd_mode_sense_dad_mode_err_recov(struct scsi_pkt *);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcthstatic int bsd_mode_sense_modepage_disco_reco(struct scsi_pkt *);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcthstatic int bsd_mode_sense_dad_mode_format(struct scsi_pkt *);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcthstatic int bsd_mode_sense_dad_mode_cache(struct scsi_pkt *);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcthstatic int bsd_readblks(struct emul64 *, ushort_t, ushort_t, diskaddr_t,
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth int, unsigned char *);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcthstatic int bsd_writeblks(struct emul64 *, ushort_t, ushort_t, diskaddr_t,
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth int, unsigned char *);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcthemul64_tgt_t *find_tgt(struct emul64 *, ushort_t, ushort_t);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcthstatic blklist_t *bsd_findblk(emul64_tgt_t *, diskaddr_t, avl_index_t *);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcthstatic void bsd_allocblk(emul64_tgt_t *, diskaddr_t, caddr_t, avl_index_t);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcthstatic emul64_rng_overlap_t bsd_tgt_overlap(emul64_tgt_t *, diskaddr_t, int);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * Initialize globals in this file.
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth emul64_zeros = (unsigned char *) kmem_zalloc(DEV_BSIZE, KM_SLEEP);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth mutex_init(&emul64_stats_mutex, NULL, MUTEX_DRIVER, NULL);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth mutex_init(&emul64_yield_mutex, NULL, MUTEX_DRIVER, NULL);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * Clean up globals in this file.
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * Attempt to get the values of the properties that are specified in the
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * emul64_properties array. If the property exists, copy its value to the
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * specified location. All the properties have been assigned default
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * values in this driver, so if we cannot get the property that is not a
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * problem.
cd210bb4840e6add5921c775aa07cebd6891f738Chris Horne i < sizeof (emul64_properties) / sizeof (struct prop_map);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth return (-1);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth return (0);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth return (1);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth/* ARGSUSED 0 */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth return (0);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth/* ARGSUSED 0 */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth return (0);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth/* ARGSUSED 0 */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth return (0);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcthbsd_scsi_inq_page0(struct scsi_pkt *pkt, uchar_t pqdtype)
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth cmn_err(CE_CONT, "%s: bsd_scsi_inq_page0: size %d required\n",
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth return (0);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcthbsd_scsi_inq_page83(struct scsi_pkt *pkt, uchar_t pqdtype)
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth cmn_err(CE_CONT, "%s: bsd_scsi_inq_page83: size %d required\n",
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth sp->cmd_addr[5] = 3; /* association and device ID type 3 */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth /* @22: */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * Instances seem to be assigned sequentially, so it unlikely that we
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * will have more than 65535 of them.
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth return (0);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth cmn_err(CE_CONT, "%s: bsd_scsi_inquiry: size %d required\n",
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth emul64_check_cond(pkt, 0x5, 0x24, 0x0); /* inv. fld in cdb */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth return (0);
cd210bb4840e6add5921c775aa07cebd6891f738Chris Horne "unsupported 0x%x",
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth /* set up the inquiry data we return */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth return (0);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth/* ARGSUSED 0 */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth return (0);
cd210bb4840e6add5921c775aa07cebd6891f738Chris Horne pkt->pkt_address.a_target, pkt->pkt_address.a_lun,
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth "read g0 blk=%lld (0x%llx) nblks=%d\n",
cd210bb4840e6add5921c775aa07cebd6891f738Chris Horne pkt->pkt_address.a_target, pkt->pkt_address.a_lun,
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth "write g0 blk=%lld (0x%llx) nblks=%d\n",
cd210bb4840e6add5921c775aa07cebd6891f738Chris Horne pkt->pkt_address.a_target, pkt->pkt_address.a_lun,
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth "read g1 blk=%lld (0x%llx) nblks=%d\n",
cd210bb4840e6add5921c775aa07cebd6891f738Chris Horne pkt->pkt_address.a_target, pkt->pkt_address.a_lun,
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth "write g1 blk=%lld (0x%llx) nblks=%d\n",
cd210bb4840e6add5921c775aa07cebd6891f738Chris Horne pkt->pkt_address.a_target, pkt->pkt_address.a_lun,
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth "read g4 blk=%lld (0x%llx) nblks=%d\n",
cd210bb4840e6add5921c775aa07cebd6891f738Chris Horne pkt->pkt_address.a_target, pkt->pkt_address.a_lun,
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth "write g4 blk=%lld (0x%llx) nblks=%d\n",
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth cmn_err(CE_WARN, "%s: bsd_scsi_io: unhandled I/O: 0x%x",
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth "pkt_resid: 0x%lx, lblkno %lld, nblks %d",
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth return (0);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth cmn_err(CE_CONT, "%s: bsd_scsi_log_sense size %d required\n",
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth emul64_check_cond(pkt, 0x5, 0x24, 0x0); /* inv. fld in cdb */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth return (0);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth return (0);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth "page=0x%x control=0x%x nbytes=%d\n",
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth "page=0x%x control=0x%x nbytes=%d\n",
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth cmn_err(CE_CONT, "%s: bsd_mode_sense_dad_mode_geometry: "
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth "pc=%d n=%d\n", emul64_name, page_control, sp->cmd_count);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth if (sp->cmd_count < (sizeof (header) + sizeof (page4))) {
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth cmn_err(CE_CONT, "%s: bsd_mode_sense_dad_mode_geometry: "
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth "size %d required\n",
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth page4.mode_page.length = sizeof (page4) - sizeof (struct mode_page);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth (void) bcopy(&page4, addr + sizeof (header), sizeof (page4));
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth pkt->pkt_resid = sp->cmd_count - sizeof (page4) - sizeof (header);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth cmn_err(CE_CONT, "%s: bsd_mode_sense_dad_mode_err_recov: "
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth "pc=%d n=%d\n", emul64_name, page_control, sp->cmd_count);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth if (sp->cmd_count < (sizeof (header) + sizeof (page1))) {
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth cmn_err(CE_CONT, "%s: bsd_mode_sense_dad_mode_err_recov: "
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth "size %d required\n",
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth page1.mode_page.length = sizeof (page1) - sizeof (struct mode_page);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth (void) bcopy(&page1, addr + sizeof (header), sizeof (page1));
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth pkt->pkt_resid = sp->cmd_count - sizeof (page1) - sizeof (header);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth cmn_err(CE_CONT, "%s: bsd_mode_sense_modepage_disco_reco: "
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth "pc=%d n=%d\n", emul64_name, page_control, sp->cmd_count);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth if (sp->cmd_count < (sizeof (header) + sizeof (page2))) {
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth cmn_err(CE_CONT, "%s: bsd_mode_sense_modepage_disco_reco: "
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth "size %d required\n",
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth page2.mode_page.length = sizeof (page2) - sizeof (struct mode_page);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth (void) bcopy(&page2, addr + sizeof (header), sizeof (page2));
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth pkt->pkt_resid = sp->cmd_count - sizeof (page2) - sizeof (header);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth "pc=%d n=%d\n", emul64_name, page_control, sp->cmd_count);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth if (sp->cmd_count < (sizeof (header) + sizeof (page3))) {
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth "size %d required\n",
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth page3.mode_page.length = sizeof (page3) - sizeof (struct mode_page);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth page3.data_bytes_sect = ushort_to_scsi_ushort(DEV_BSIZE);
cd210bb4840e6add5921c775aa07cebd6891f738Chris Horne pkt->pkt_address.a_target, pkt->pkt_address.a_lun);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth page3.sect_track = ushort_to_scsi_ushort(tgt->emul64_tgt_nsect);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth (void) bcopy(&page3, addr + sizeof (header), sizeof (page3));
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth pkt->pkt_resid = sp->cmd_count - sizeof (page3) - sizeof (header);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth "pc=%d n=%d\n", emul64_name, page_control, sp->cmd_count);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth if (sp->cmd_count < (sizeof (header) + sizeof (page8))) {
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth "size %d required\n",
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth page8.mode_page.length = sizeof (page8) - sizeof (struct mode_page);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth (void) bcopy(&page8, addr + sizeof (header), sizeof (page8));
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth pkt->pkt_resid = sp->cmd_count - sizeof (page8) - sizeof (header);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth/* ARGSUSED 0 */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth return (0);
cd210bb4840e6add5921c775aa07cebd6891f738Chris Horne pkt->pkt_address.a_target, pkt->pkt_address.a_lun);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth pkt->pkt_resid = sp->cmd_count - sizeof (struct scsi_capacity);
cd210bb4840e6add5921c775aa07cebd6891f738Chris Horne sizeof (struct scsi_capacity));
cd210bb4840e6add5921c775aa07cebd6891f738Chris Horne pkt->pkt_address.a_target, pkt->pkt_address.a_lun);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth cap.sc_capacity = uint64_to_scsi_uint64(tgt->emul64_tgt_sectors);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth cap.sc_lbasize = uint32_to_scsi_uint32((uint_t)DEV_BSIZE);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth pkt->pkt_resid = sp->cmd_count - sizeof (struct scsi_capacity_16);
cd210bb4840e6add5921c775aa07cebd6891f738Chris Horne sizeof (struct scsi_capacity_16));
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth/* ARGSUSED 0 */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth return (0);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth/* ARGSUSED 0 */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth return (0);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth return (0);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth/* ARGSUSED 0 */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth return (0);
cd210bb4840e6add5921c775aa07cebd6891f738Chris Hornebsd_readblks(struct emul64 *emul64, ushort_t target, ushort_t lun,
cd210bb4840e6add5921c775aa07cebd6891f738Chris Horne diskaddr_t blkno, int nblks, unsigned char *bufaddr)
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth int i = 0;
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth "<%d,%d> blk %llu (0x%llx) nblks %d\n",
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth cmn_err(CE_WARN, "%s: bsd_readblks: no target for %d,%d\n",
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * Keep the ioctls from changing the nowrite list for the duration
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * of this I/O by grabbing emul64_tgt_nw_lock. This will keep the
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * results from our call to bsd_tgt_overlap from changing while we
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * do the I/O.
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth "read to blocked area %lld,%d\n",
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth for (i = 0; i < nblks; i++) {
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth "%d of %d: blkno %lld\n",
cd210bb4840e6add5921c775aa07cebd6891f738Chris Hornebsd_writeblks(struct emul64 *emul64, ushort_t target, ushort_t lun,
cd210bb4840e6add5921c775aa07cebd6891f738Chris Horne diskaddr_t blkno, int nblks, unsigned char *bufaddr)
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth int i = 0;
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth "<%d,%d> blk %llu (0x%llx) nblks %d\n",
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth cmn_err(CE_WARN, "%s: bsd_writeblks: no target for %d,%d\n",
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * Keep the ioctls from changing the nowrite list for the duration
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * of this I/O by grabbing emul64_tgt_nw_lock. This will keep the
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * results from our call to bsd_tgt_overlap from changing while we
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * do the I/O.
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth return (0);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth for (i = 0; i < nblks; i++) {
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * If there was no overlap for the entire I/O range
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * or if there is no overlap for this particular
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * block, then we need to do the write.
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth "%d of %d: blkno %lld\n",
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth "blkno %lld, tgt_sectors %lld\n",
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * Now that we're done with our I/O, allow the ioctls to change the
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * nowrite list.
cd210bb4840e6add5921c775aa07cebd6891f738Chris Hornefind_tgt(struct emul64 *emul64, ushort_t target, ushort_t lun)
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * Free all blocks that are part of the specified range.
b1dd958f54f8bfa984d306bb8ca8264855761d7bcthbsd_freeblkrange(emul64_tgt_t *tgt, emul64_range_t *range)
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth for (blk = (blklist_t *)avl_first(&tgt->emul64_tgt_data);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * We need to get the next block pointer now, because blk
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * will be freed inside the if statement.
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth if (emul64_overlap(range, blk->bl_blkno, (size_t)1) != O_NONE) {
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth return (0);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcthbsd_findblk(emul64_tgt_t *tgt, diskaddr_t blkno, avl_index_t *where)
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth blk = (blklist_t *)avl_find(&tgt->emul64_tgt_data, &search, where);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcthstatic void
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth blk = (blklist_t *)kmem_zalloc(sizeof (blklist_t), KM_SLEEP);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth blk->bl_data = (uchar_t *)kmem_zalloc(DEV_BSIZE, KM_SLEEP);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcthstatic void
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * Look for overlap between a nowrite range and a block range.
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * NOTE: Callers of this function must hold the tgt->emul64_tgt_nw_lock
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * lock. For the purposes of this function, a reader lock is
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * sufficient.
b1dd958f54f8bfa984d306bb8ca8264855761d7bcthbsd_tgt_overlap(emul64_tgt_t *tgt, diskaddr_t blkno, int count)
cd210bb4840e6add5921c775aa07cebd6891f738Chris Horne rv = emul64_overlap(&nw->emul64_blocked, blkno, (size_t)count);
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * Operations that do a lot of I/O, such as RAID 5 initializations, result
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * in a CPU bound kernel when the device is an emul64 device. This makes
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * the machine look hung. To avoid this problem, give up the CPU from time
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * to time.
b1dd958f54f8bfa984d306bb8ca8264855761d7bcthstatic void
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth static uint_t emul64_io_count = 0; /* # I/Os since last wait */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth static uint_t emul64_waiting = FALSE; /* TRUE -> a thread is in */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth /* cv_timed wait. */
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * Another thread has already started the timer. We'll
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * just wait here until their time expires, and they
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * broadcast to us. When they do that, we'll return and
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * let our caller do more I/O.
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * Set emul64_waiting to let other threads know that we
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth * have started the timer.
d3d50737e566cade9a08d73d2af95105ac7cd960Rafael Vanoni (void) cv_reltimedwait(&emul64_yield_cv, &emul64_yield_mutex,
b1dd958f54f8bfa984d306bb8ca8264855761d7bcth /* Broadcast in case others are waiting. */