/* * Implementation of the Common Access Method Transport (XPT) layer. * * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs. * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions, and the following disclaimer, * without modification, immediately at the beginning of the file. * 2. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD: src/sys/cam/cam_xpt.c,v 1.80.2.18 2002/12/09 17:31:55 gibbs Exp $ */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "cam.h" #include "cam_ccb.h" #include "cam_periph.h" #include "cam_sim.h" #include "cam_xpt.h" #include "cam_xpt_sim.h" #include "cam_xpt_periph.h" #include "cam_debug.h" #include "scsi/scsi_all.h" #include "scsi/scsi_message.h" #include "scsi/scsi_pass.h" #include #include "opt_cam.h" /* Datastructures internal to the xpt layer */ MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers"); /* Object for defering XPT actions to a taskqueue */ struct xpt_task { struct task task; void *data1; uintptr_t data2; }; /* * Definition of an async handler callback block. These are used to add * SIMs and peripherals to the async callback lists. */ struct async_node { SLIST_ENTRY(async_node) links; u_int32_t event_enable; /* Async Event enables */ void (*callback)(void *arg, u_int32_t code, struct cam_path *path, void *args); void *callback_arg; }; SLIST_HEAD(async_list, async_node); SLIST_HEAD(periph_list, cam_periph); /* * This is the maximum number of high powered commands (e.g. start unit) * that can be outstanding at a particular time. */ #ifndef CAM_MAX_HIGHPOWER #define CAM_MAX_HIGHPOWER 4 #endif /* * Structure for queueing a device in a run queue. * There is one run queue for allocating new ccbs, * and another for sending ccbs to the controller. */ struct cam_ed_qinfo { cam_pinfo pinfo; struct cam_ed *device; }; /* * The CAM EDT (Existing Device Table) contains the device information for * all devices for all busses in the system. The table contains a * cam_ed structure for each device on the bus. */ struct cam_ed { TAILQ_ENTRY(cam_ed) links; struct cam_ed_qinfo alloc_ccb_entry; struct cam_ed_qinfo send_ccb_entry; struct cam_et *target; struct cam_sim *sim; lun_id_t lun_id; struct camq drvq; /* * Queue of type drivers wanting to do * work on this device. */ struct cam_ccbq ccbq; /* Queue of pending ccbs */ struct async_list asyncs; /* Async callback info for this B/T/L */ struct periph_list periphs; /* All attached devices */ u_int generation; /* Generation number */ struct cam_periph *owner; /* Peripheral driver's ownership tag */ struct xpt_quirk_entry *quirk; /* Oddities about this device */ /* Storage for the inquiry data */ cam_proto protocol; u_int protocol_version; cam_xport transport; u_int transport_version; struct scsi_inquiry_data inq_data; u_int8_t inq_flags; /* * Current settings for inquiry flags. * This allows us to override settings * like disconnection and tagged * queuing for a device. */ u_int8_t queue_flags; /* Queue flags from the control page */ u_int8_t serial_num_len; u_int8_t *serial_num; u_int32_t qfrozen_cnt; u_int32_t flags; #define CAM_DEV_UNCONFIGURED 0x01 #define CAM_DEV_REL_TIMEOUT_PENDING 0x02 #define CAM_DEV_REL_ON_COMPLETE 0x04 #define CAM_DEV_REL_ON_QUEUE_EMPTY 0x08 #define CAM_DEV_RESIZE_QUEUE_NEEDED 0x10 #define CAM_DEV_TAG_AFTER_COUNT 0x20 #define CAM_DEV_INQUIRY_DATA_VALID 0x40 #define CAM_DEV_IN_DV 0x80 #define CAM_DEV_DV_HIT_BOTTOM 0x100 u_int32_t tag_delay_count; #define CAM_TAG_DELAY_COUNT 5 u_int32_t tag_saved_openings; u_int32_t refcount; struct callout callout; }; /* * Each target is represented by an ET (Existing Target). These * entries are created when a target is successfully probed with an * identify, and removed when a device fails to respond after a number * of retries, or a bus rescan finds the device missing. */ struct cam_et { TAILQ_HEAD(, cam_ed) ed_entries; TAILQ_ENTRY(cam_et) links; struct cam_eb *bus; target_id_t target_id; u_int32_t refcount; u_int generation; struct timeval last_reset; /* uptime of last reset */ }; /* * Each bus is represented by an EB (Existing Bus). These entries * are created by calls to xpt_bus_register and deleted by calls to * xpt_bus_deregister. */ struct cam_eb { TAILQ_HEAD(, cam_et) et_entries; TAILQ_ENTRY(cam_eb) links; path_id_t path_id; struct cam_sim *sim; struct timeval last_reset; /* uptime of last reset */ u_int32_t flags; #define CAM_EB_RUNQ_SCHEDULED 0x01 u_int32_t refcount; u_int generation; int counted_to_config; /* busses_to_config */ }; struct cam_path { struct cam_periph *periph; struct cam_eb *bus; struct cam_et *target; struct cam_ed *device; }; struct xpt_quirk_entry { struct scsi_inquiry_pattern inq_pat; u_int8_t quirks; #define CAM_QUIRK_NOLUNS 0x01 #define CAM_QUIRK_NOSERIAL 0x02 #define CAM_QUIRK_HILUNS 0x04 #define CAM_QUIRK_NOHILUNS 0x08 u_int mintags; u_int maxtags; }; static int cam_srch_hi = 0; TUNABLE_INT("kern.cam.cam_srch_hi", &cam_srch_hi); static int sysctl_cam_search_luns(SYSCTL_HANDLER_ARGS); SYSCTL_PROC(_kern_cam, OID_AUTO, cam_srch_hi, CTLTYPE_INT|CTLFLAG_RW, 0, 0, sysctl_cam_search_luns, "I", "allow search above LUN 7 for SCSI3 and greater devices"); #define CAM_SCSI2_MAXLUN 8 /* * If we're not quirked to search <= the first 8 luns * and we are either quirked to search above lun 8, * or we're > SCSI-2 and we've enabled hilun searching, * or we're > SCSI-2 and the last lun was a success, * we can look for luns above lun 8. */ #define CAN_SRCH_HI_SPARSE(dv) \ (((dv->quirk->quirks & CAM_QUIRK_NOHILUNS) == 0) \ && ((dv->quirk->quirks & CAM_QUIRK_HILUNS) \ || (SID_ANSI_REV(&dv->inq_data) > SCSI_REV_2 && cam_srch_hi))) #define CAN_SRCH_HI_DENSE(dv) \ (((dv->quirk->quirks & CAM_QUIRK_NOHILUNS) == 0) \ && ((dv->quirk->quirks & CAM_QUIRK_HILUNS) \ || (SID_ANSI_REV(&dv->inq_data) > SCSI_REV_2))) typedef enum { XPT_FLAG_OPEN = 0x01 } xpt_flags; struct xpt_softc { xpt_flags flags; u_int32_t xpt_generation; /* number of high powered commands that can go through right now */ STAILQ_HEAD(highpowerlist, ccb_hdr) highpowerq; int num_highpower; /* queue for handling async rescan requests. */ TAILQ_HEAD(, ccb_hdr) ccb_scanq; int ccb_scanq_running; /* Registered busses */ TAILQ_HEAD(,cam_eb) xpt_busses; u_int bus_generation; struct intr_config_hook *xpt_config_hook; struct lock xpt_topo_lock; struct lock xpt_lock; }; static const char quantum[] = "QUANTUM"; static const char sony[] = "SONY"; static const char west_digital[] = "WDIGTL"; static const char samsung[] = "SAMSUNG"; static const char seagate[] = "SEAGATE"; static const char microp[] = "MICROP"; static struct xpt_quirk_entry xpt_quirk_table[] = { { /* Reports QUEUE FULL for temporary resource shortages */ { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP39100*", "*" }, /*quirks*/0, /*mintags*/24, /*maxtags*/32 }, { /* Reports QUEUE FULL for temporary resource shortages */ { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP34550*", "*" }, /*quirks*/0, /*mintags*/24, /*maxtags*/32 }, { /* Reports QUEUE FULL for temporary resource shortages */ { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP32275*", "*" }, /*quirks*/0, /*mintags*/24, /*maxtags*/32 }, { /* Broken tagged queuing drive */ { T_DIRECT, SIP_MEDIA_FIXED, microp, "4421-07*", "*" }, /*quirks*/0, /*mintags*/0, /*maxtags*/0 }, { /* Broken tagged queuing drive */ { T_DIRECT, SIP_MEDIA_FIXED, "HP", "C372*", "*" }, /*quirks*/0, /*mintags*/0, /*maxtags*/0 }, { /* Broken tagged queuing drive */ { T_DIRECT, SIP_MEDIA_FIXED, microp, "3391*", "x43h" }, /*quirks*/0, /*mintags*/0, /*maxtags*/0 }, { /* * Unfortunately, the Quantum Atlas III has the same * problem as the Atlas II drives above. * Reported by: "Johan Granlund" * * For future reference, the drive with the problem was: * QUANTUM QM39100TD-SW N1B0 * * It's possible that Quantum will fix the problem in later * firmware revisions. If that happens, the quirk entry * will need to be made specific to the firmware revisions * with the problem. * */ /* Reports QUEUE FULL for temporary resource shortages */ { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM39100*", "*" }, /*quirks*/0, /*mintags*/24, /*maxtags*/32 }, { /* * 18 Gig Atlas III, same problem as the 9G version. * Reported by: Andre Albsmeier * * * For future reference, the drive with the problem was: * QUANTUM QM318000TD-S N491 */ /* Reports QUEUE FULL for temporary resource shortages */ { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM318000*", "*" }, /*quirks*/0, /*mintags*/24, /*maxtags*/32 }, { /* * Broken tagged queuing drive * Reported by: Bret Ford * and: Martin Renters */ { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST410800*", "71*" }, /*quirks*/0, /*mintags*/0, /*maxtags*/0 }, /* * The Seagate Medalist Pro drives have very poor write * performance with anything more than 2 tags. * * Reported by: Paul van der Zwan * Drive: * * Reported by: Jeremy Lea * Drive: * * No one has actually reported that the 9G version * (ST39140*) of the Medalist Pro has the same problem, but * we're assuming that it does because the 4G and 6.5G * versions of the drive are broken. */ { { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST34520*", "*"}, /*quirks*/0, /*mintags*/2, /*maxtags*/2 }, { { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST36530*", "*"}, /*quirks*/0, /*mintags*/2, /*maxtags*/2 }, { { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST39140*", "*"}, /*quirks*/0, /*mintags*/2, /*maxtags*/2 }, { /* * Slow when tagged queueing is enabled. Write performance * steadily drops off with more and more concurrent * transactions. Best sequential write performance with * tagged queueing turned off and write caching turned on. * * PR: kern/10398 * Submitted by: Hideaki Okada * Drive: DCAS-34330 w/ "S65A" firmware. * * The drive with the problem had the "S65A" firmware * revision, and has also been reported (by Stephen J. * Roznowski ) for a drive with the "S61A" * firmware revision. * * Although no one has reported problems with the 2 gig * version of the DCAS drive, the assumption is that it * has the same problems as the 4 gig version. Therefore * this quirk entries disables tagged queueing for all * DCAS drives. */ { T_DIRECT, SIP_MEDIA_FIXED, "IBM", "DCAS*", "*" }, /*quirks*/0, /*mintags*/0, /*maxtags*/0 }, { /* Broken tagged queuing drive */ { T_DIRECT, SIP_MEDIA_REMOVABLE, "iomega", "jaz*", "*" }, /*quirks*/0, /*mintags*/0, /*maxtags*/0 }, { /* Broken tagged queuing drive */ { T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CFP2107*", "*" }, /*quirks*/0, /*mintags*/0, /*maxtags*/0 }, { /* This does not support other than LUN 0 */ { T_DIRECT, SIP_MEDIA_FIXED, "VMware*", "*", "*" }, CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255 }, { /* * Broken tagged queuing drive. * Submitted by: * NAKAJI Hiroyuki * in PR kern/9535 */ { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN34324U*", "*" }, /*quirks*/0, /*mintags*/0, /*maxtags*/0 }, { /* * Slow when tagged queueing is enabled. (1.5MB/sec versus * 8MB/sec.) * Submitted by: Andrew Gallatin * Best performance with these drives is achieved with * tagged queueing turned off, and write caching turned on. */ { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "WDE*", "*" }, /*quirks*/0, /*mintags*/0, /*maxtags*/0 }, { /* * Slow when tagged queueing is enabled. (1.5MB/sec versus * 8MB/sec.) * Submitted by: Andrew Gallatin * Best performance with these drives is achieved with * tagged queueing turned off, and write caching turned on. */ { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "ENTERPRISE", "*" }, /*quirks*/0, /*mintags*/0, /*maxtags*/0 }, { /* * Doesn't handle queue full condition correctly, * so we need to limit maxtags to what the device * can handle instead of determining this automatically. */ { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN321010S*", "*" }, /*quirks*/0, /*mintags*/2, /*maxtags*/32 }, { /* Really only one LUN */ { T_ENCLOSURE, SIP_MEDIA_FIXED, "SUN", "SENA", "*" }, CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 }, { /* I can't believe we need a quirk for DPT volumes. */ { T_ANY, SIP_MEDIA_FIXED|SIP_MEDIA_REMOVABLE, "DPT", "*", "*" }, CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/255 }, { /* * Many Sony CDROM drives don't like multi-LUN probing. */ { T_CDROM, SIP_MEDIA_REMOVABLE, sony, "CD-ROM CDU*", "*" }, CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 }, { /* * This drive doesn't like multiple LUN probing. * Submitted by: Parag Patel */ { T_WORM, SIP_MEDIA_REMOVABLE, sony, "CD-R CDU9*", "*" }, CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 }, { { T_WORM, SIP_MEDIA_REMOVABLE, "YAMAHA", "CDR100*", "*" }, CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 }, { /* * The 8200 doesn't like multi-lun probing, and probably * don't like serial number requests either. */ { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE", "EXB-8200*", "*" }, CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 }, { /* * Let's try the same as above, but for a drive that says * it's an IPL-6860 but is actually an EXB 8200. */ { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE", "IPL-6860*", "*" }, CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 }, { /* * These Hitachi drives don't like multi-lun probing. * The PR submitter has a DK319H, but says that the Linux * kernel has a similar work-around for the DK312 and DK314, * so all DK31* drives are quirked here. * PR: misc/18793 * Submitted by: Paul Haddad */ { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK31*", "*" }, CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255 }, { /* * The Hitachi CJ series with J8A8 firmware apparantly has * problems with tagged commands. * PR: 23536 * Reported by: amagai@nue.org */ { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK32CJ*", "J8A8" }, CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 }, { /* * These are the large storage arrays. * Submitted by: William Carrel */ { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "OPEN*", "*" }, CAM_QUIRK_HILUNS, 2, 1024 }, { /* * This old revision of the TDC3600 is also SCSI-1, and * hangs upon serial number probing. */ { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG", " TDC 3600", "U07:" }, CAM_QUIRK_NOSERIAL, /*mintags*/0, /*maxtags*/0 }, { /* * Would repond to all LUNs if asked for. */ { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "CALIPER", "CP150", "*" }, CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 }, { /* * Would repond to all LUNs if asked for. */ { T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY", "96X2*", "*" }, CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 }, { /* Submitted by: Matthew Dodd */ { T_PROCESSOR, SIP_MEDIA_FIXED, "Cabletrn", "EA41*", "*" }, CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 }, { /* Submitted by: Matthew Dodd */ { T_PROCESSOR, SIP_MEDIA_FIXED, "CABLETRN", "EA41*", "*" }, CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 }, { /* TeraSolutions special settings for TRC-22 RAID */ { T_DIRECT, SIP_MEDIA_FIXED, "TERASOLU", "TRC-22", "*" }, /*quirks*/0, /*mintags*/55, /*maxtags*/255 }, { /* Veritas Storage Appliance */ { T_DIRECT, SIP_MEDIA_FIXED, "VERITAS", "*", "*" }, CAM_QUIRK_HILUNS, /*mintags*/2, /*maxtags*/1024 }, { /* * Would respond to all LUNs. Device type and removable * flag are jumper-selectable. */ { T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, "MaxOptix", "Tahiti 1", "*" }, CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 }, { /* EasyRAID E5A aka. areca ARC-6010 */ { T_DIRECT, SIP_MEDIA_FIXED, "easyRAID", "*", "*" }, CAM_QUIRK_NOHILUNS, /*mintags*/2, /*maxtags*/255 }, { { T_ENCLOSURE, SIP_MEDIA_FIXED, "DP", "BACKPLANE", "*" }, CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 }, { /* Default tagged queuing parameters for all devices */ { T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, /*vendor*/"*", /*product*/"*", /*revision*/"*" }, /*quirks*/0, /*mintags*/2, /*maxtags*/255 }, }; static const int xpt_quirk_table_size = NELEM(xpt_quirk_table); typedef enum { DM_RET_COPY = 0x01, DM_RET_FLAG_MASK = 0x0f, DM_RET_NONE = 0x00, DM_RET_STOP = 0x10, DM_RET_DESCEND = 0x20, DM_RET_ERROR = 0x30, DM_RET_ACTION_MASK = 0xf0 } dev_match_ret; typedef enum { XPT_DEPTH_BUS, XPT_DEPTH_TARGET, XPT_DEPTH_DEVICE, XPT_DEPTH_PERIPH } xpt_traverse_depth; struct xpt_traverse_config { xpt_traverse_depth depth; void *tr_func; void *tr_arg; }; typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg); typedef int xpt_targetfunc_t (struct cam_et *target, void *arg); typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg); typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg); typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg); /* Transport layer configuration information */ static struct xpt_softc xsoftc; /* Queues for our software interrupt handler */ typedef TAILQ_HEAD(cam_isrq, ccb_hdr) cam_isrq_t; typedef TAILQ_HEAD(cam_simq, cam_sim) cam_simq_t; static cam_simq_t cam_simq; static struct spinlock cam_simq_spin; struct cam_periph *xpt_periph; static periph_init_t xpt_periph_init; static periph_init_t probe_periph_init; static struct periph_driver xpt_driver = { xpt_periph_init, "xpt", TAILQ_HEAD_INITIALIZER(xpt_driver.units) }; static struct periph_driver probe_driver = { probe_periph_init, "probe", TAILQ_HEAD_INITIALIZER(probe_driver.units) }; PERIPHDRIVER_DECLARE(xpt, xpt_driver); PERIPHDRIVER_DECLARE(probe, probe_driver); static d_open_t xptopen; static d_close_t xptclose; static d_ioctl_t xptioctl; static struct dev_ops xpt_ops = { { "xpt", 0, 0 }, .d_open = xptopen, .d_close = xptclose, .d_ioctl = xptioctl }; static void dead_sim_action(struct cam_sim *sim, union ccb *ccb); static void dead_sim_poll(struct cam_sim *sim); /* Dummy SIM that is used when the real one has gone. */ static struct cam_sim cam_dead_sim; static struct lock cam_dead_lock; /* Storage for debugging datastructures */ #ifdef CAMDEBUG struct cam_path *cam_dpath; u_int32_t cam_dflags; u_int32_t cam_debug_delay; #endif #if defined(CAM_DEBUG_FLAGS) && !defined(CAMDEBUG) #error "You must have options CAMDEBUG to use options CAM_DEBUG_FLAGS" #endif /* * In order to enable the CAM_DEBUG_* options, the user must have CAMDEBUG * enabled. Also, the user must have either none, or all of CAM_DEBUG_BUS, * CAM_DEBUG_TARGET, and CAM_DEBUG_LUN specified. */ #if defined(CAM_DEBUG_BUS) || defined(CAM_DEBUG_TARGET) \ || defined(CAM_DEBUG_LUN) #ifdef CAMDEBUG #if !defined(CAM_DEBUG_BUS) || !defined(CAM_DEBUG_TARGET) \ || !defined(CAM_DEBUG_LUN) #error "You must define all or none of CAM_DEBUG_BUS, CAM_DEBUG_TARGET \ and CAM_DEBUG_LUN" #endif /* !CAM_DEBUG_BUS || !CAM_DEBUG_TARGET || !CAM_DEBUG_LUN */ #else /* !CAMDEBUG */ #error "You must use options CAMDEBUG if you use the CAM_DEBUG_* options" #endif /* CAMDEBUG */ #endif /* CAM_DEBUG_BUS || CAM_DEBUG_TARGET || CAM_DEBUG_LUN */ /* Our boot-time initialization hook */ static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *); static moduledata_t cam_moduledata = { "cam", cam_module_event_handler, NULL }; static int xpt_init(void *); DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND); MODULE_VERSION(cam, 1); static cam_status xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph, path_id_t path_id, target_id_t target_id, lun_id_t lun_id); static void xpt_release_path(struct cam_path *path); static void xpt_async_bcast(struct async_list *async_head, u_int32_t async_code, struct cam_path *path, void *async_arg); static void xpt_dev_async(u_int32_t async_code, struct cam_eb *bus, struct cam_et *target, struct cam_ed *device, void *async_arg); static path_id_t xptnextfreepathid(void); static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus); static union ccb *xpt_get_ccb(struct cam_ed *device); static int xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo, u_int32_t new_priority); static void xpt_run_dev_allocq(struct cam_eb *bus); static void xpt_run_dev_sendq(struct cam_eb *bus); static timeout_t xpt_release_devq_timeout; static void xpt_release_bus(struct cam_eb *bus); static void xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue); static struct cam_et* xpt_alloc_target(struct cam_eb *bus, target_id_t target_id); static void xpt_release_target(struct cam_eb *bus, struct cam_et *target); static struct cam_ed* xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id); static void xpt_release_device(struct cam_eb *bus, struct cam_et *target, struct cam_ed *device); static u_int32_t xpt_dev_ccbq_resize(struct cam_path *path, int newopenings); static struct cam_eb* xpt_find_bus(path_id_t path_id); static struct cam_et* xpt_find_target(struct cam_eb *bus, target_id_t target_id); static struct cam_ed* xpt_find_device(struct cam_et *target, lun_id_t lun_id); static void xpt_scan_bus(struct cam_periph *periph, union ccb *ccb); static void xpt_scan_lun(struct cam_periph *periph, struct cam_path *path, cam_flags flags, union ccb *ccb); static void xptscandone(struct cam_periph *periph, union ccb *done_ccb); static xpt_busfunc_t xptconfigbuscountfunc; static xpt_busfunc_t xptconfigfunc; static void xpt_config(void *arg); static xpt_devicefunc_t xptpassannouncefunc; static void xpt_finishconfig(struct cam_periph *periph, union ccb *ccb); static void xpt_uncount_bus (struct cam_eb *bus); static void xptaction(struct cam_sim *sim, union ccb *work_ccb); static void xptpoll(struct cam_sim *sim); static inthand2_t swi_cambio; static void camisr(void *); static void camisr_runqueue(struct cam_sim *); static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns, struct cam_eb *bus); static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns, struct cam_ed *device); static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns, struct cam_periph *periph); static xpt_busfunc_t xptedtbusfunc; static xpt_targetfunc_t xptedttargetfunc; static xpt_devicefunc_t xptedtdevicefunc; static xpt_periphfunc_t xptedtperiphfunc; static xpt_pdrvfunc_t xptplistpdrvfunc; static xpt_periphfunc_t xptplistperiphfunc; static int xptedtmatch(struct ccb_dev_match *cdm); static int xptperiphlistmatch(struct ccb_dev_match *cdm); static int xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg); static int xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target, xpt_targetfunc_t *tr_func, void *arg); static int xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device, xpt_devicefunc_t *tr_func, void *arg); static int xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph, xpt_periphfunc_t *tr_func, void *arg); static int xptpdrvtraverse(struct periph_driver **start_pdrv, xpt_pdrvfunc_t *tr_func, void *arg); static int xptpdperiphtraverse(struct periph_driver **pdrv, struct cam_periph *start_periph, xpt_periphfunc_t *tr_func, void *arg); static xpt_busfunc_t xptdefbusfunc; static xpt_targetfunc_t xptdeftargetfunc; static xpt_devicefunc_t xptdefdevicefunc; static xpt_periphfunc_t xptdefperiphfunc; static int xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg); static int xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg); static xpt_devicefunc_t xptsetasyncfunc; static xpt_busfunc_t xptsetasyncbusfunc; static cam_status xptregister(struct cam_periph *periph, void *arg); static cam_status proberegister(struct cam_periph *periph, void *arg); static void probeschedule(struct cam_periph *probe_periph); static void probestart(struct cam_periph *periph, union ccb *start_ccb); static void proberequestdefaultnegotiation(struct cam_periph *periph); static int proberequestbackoff(struct cam_periph *periph, struct cam_ed *device); static void probedone(struct cam_periph *periph, union ccb *done_ccb); static void probecleanup(struct cam_periph *periph); static void xpt_find_quirk(struct cam_ed *device); static void xpt_devise_transport(struct cam_path *path); static void xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device, int async_update); static void xpt_toggle_tags(struct cam_path *path); static void xpt_start_tags(struct cam_path *path); static __inline int xpt_schedule_dev_allocq(struct cam_eb *bus, struct cam_ed *dev); static __inline int xpt_schedule_dev_sendq(struct cam_eb *bus, struct cam_ed *dev); static __inline int periph_is_queued(struct cam_periph *periph); static __inline int device_is_alloc_queued(struct cam_ed *device); static __inline int device_is_send_queued(struct cam_ed *device); static __inline int dev_allocq_is_runnable(struct cam_devq *devq); static __inline int xpt_schedule_dev_allocq(struct cam_eb *bus, struct cam_ed *dev) { int retval; if (bus->sim->devq && dev->ccbq.devq_openings > 0) { if ((dev->flags & CAM_DEV_RESIZE_QUEUE_NEEDED) != 0) { cam_ccbq_resize(&dev->ccbq, dev->ccbq.dev_openings + dev->ccbq.dev_active); dev->flags &= ~CAM_DEV_RESIZE_QUEUE_NEEDED; } /* * The priority of a device waiting for CCB resources * is that of the the highest priority peripheral driver * enqueued. */ retval = xpt_schedule_dev(&bus->sim->devq->alloc_queue, &dev->alloc_ccb_entry.pinfo, CAMQ_GET_HEAD(&dev->drvq)->priority); } else { retval = 0; } return (retval); } static __inline int xpt_schedule_dev_sendq(struct cam_eb *bus, struct cam_ed *dev) { int retval; if (bus->sim->devq && dev->ccbq.dev_openings > 0) { /* * The priority of a device waiting for controller * resources is that of the the highest priority CCB * enqueued. */ retval = xpt_schedule_dev(&bus->sim->devq->send_queue, &dev->send_ccb_entry.pinfo, CAMQ_GET_HEAD(&dev->ccbq.queue)->priority); } else { retval = 0; } return (retval); } static __inline int periph_is_queued(struct cam_periph *periph) { return (periph->pinfo.index != CAM_UNQUEUED_INDEX); } static __inline int device_is_alloc_queued(struct cam_ed *device) { return (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); } static __inline int device_is_send_queued(struct cam_ed *device) { return (device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); } static __inline int dev_allocq_is_runnable(struct cam_devq *devq) { /* * Have work to do. * Have space to do more work. * Allowed to do work. */ return ((devq->alloc_queue.qfrozen_cnt == 0) && (devq->alloc_queue.entries > 0) && (devq->alloc_openings > 0)); } static void xpt_periph_init(void) { make_dev(&xpt_ops, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0"); } static void probe_periph_init(void) { } static void xptdone(struct cam_periph *periph, union ccb *done_ccb) { /* Caller will release the CCB */ wakeup(&done_ccb->ccb_h.cbfcnp); } static int xptopen(struct dev_open_args *ap) { cdev_t dev = ap->a_head.a_dev; /* * Only allow read-write access. */ if (((ap->a_oflags & FWRITE) == 0) || ((ap->a_oflags & FREAD) == 0)) return(EPERM); /* * We don't allow nonblocking access. */ if ((ap->a_oflags & O_NONBLOCK) != 0) { kprintf("%s: can't do nonblocking access\n", devtoname(dev)); return(ENODEV); } /* Mark ourselves open */ lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); xsoftc.flags |= XPT_FLAG_OPEN; lockmgr(&xsoftc.xpt_lock, LK_RELEASE); return(0); } static int xptclose(struct dev_close_args *ap) { /* Mark ourselves closed */ lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); xsoftc.flags &= ~XPT_FLAG_OPEN; lockmgr(&xsoftc.xpt_lock, LK_RELEASE); return(0); } /* * Don't automatically grab the xpt softc lock here even though this is going * through the xpt device. The xpt device is really just a back door for * accessing other devices and SIMs, so the right thing to do is to grab * the appropriate SIM lock once the bus/SIM is located. */ static int xptioctl(struct dev_ioctl_args *ap) { int error; error = 0; switch(ap->a_cmd) { /* * For the transport layer CAMIOCOMMAND ioctl, we really only want * to accept CCB types that don't quite make sense to send through a * passthrough driver. */ case CAMIOCOMMAND: { union ccb *ccb; union ccb *inccb; struct cam_eb *bus; inccb = (union ccb *)ap->a_data; bus = xpt_find_bus(inccb->ccb_h.path_id); if (bus == NULL) { error = EINVAL; break; } switch(inccb->ccb_h.func_code) { case XPT_SCAN_BUS: case XPT_RESET_BUS: if ((inccb->ccb_h.target_id != CAM_TARGET_WILDCARD) || (inccb->ccb_h.target_lun != CAM_LUN_WILDCARD)) { error = EINVAL; break; } /* FALLTHROUGH */ case XPT_PATH_INQ: case XPT_ENG_INQ: case XPT_SCAN_LUN: ccb = xpt_alloc_ccb(); CAM_SIM_LOCK(bus->sim); /* * Create a path using the bus, target, and lun the * user passed in. */ if (xpt_create_path(&ccb->ccb_h.path, xpt_periph, inccb->ccb_h.path_id, inccb->ccb_h.target_id, inccb->ccb_h.target_lun) != CAM_REQ_CMP){ error = EINVAL; CAM_SIM_UNLOCK(bus->sim); xpt_free_ccb(ccb); break; } /* Ensure all of our fields are correct */ xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, inccb->ccb_h.pinfo.priority); xpt_merge_ccb(ccb, inccb); ccb->ccb_h.cbfcnp = xptdone; cam_periph_runccb(ccb, NULL, 0, 0, NULL); bcopy(ccb, inccb, sizeof(union ccb)); xpt_free_path(ccb->ccb_h.path); xpt_free_ccb(ccb); CAM_SIM_UNLOCK(bus->sim); break; case XPT_DEBUG: { union ccb ccb; /* * This is an immediate CCB, so it's okay to * allocate it on the stack. */ CAM_SIM_LOCK(bus->sim); /* * Create a path using the bus, target, and lun the * user passed in. */ if (xpt_create_path(&ccb.ccb_h.path, xpt_periph, inccb->ccb_h.path_id, inccb->ccb_h.target_id, inccb->ccb_h.target_lun) != CAM_REQ_CMP){ error = EINVAL; CAM_SIM_UNLOCK(bus->sim); break; } /* Ensure all of our fields are correct */ xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path, inccb->ccb_h.pinfo.priority); xpt_merge_ccb(&ccb, inccb); ccb.ccb_h.cbfcnp = xptdone; xpt_action(&ccb); CAM_SIM_UNLOCK(bus->sim); bcopy(&ccb, inccb, sizeof(union ccb)); xpt_free_path(ccb.ccb_h.path); break; } case XPT_DEV_MATCH: { struct cam_periph_map_info mapinfo; struct cam_path *old_path; /* * We can't deal with physical addresses for this * type of transaction. */ if (inccb->ccb_h.flags & CAM_DATA_PHYS) { error = EINVAL; break; } /* * Save this in case the caller had it set to * something in particular. */ old_path = inccb->ccb_h.path; /* * We really don't need a path for the matching * code. The path is needed because of the * debugging statements in xpt_action(). They * assume that the CCB has a valid path. */ inccb->ccb_h.path = xpt_periph->path; bzero(&mapinfo, sizeof(mapinfo)); /* * Map the pattern and match buffers into kernel * virtual address space. */ error = cam_periph_mapmem(inccb, &mapinfo); if (error) { inccb->ccb_h.path = old_path; break; } /* * This is an immediate CCB, we can send it on directly. */ xpt_action(inccb); /* * Map the buffers back into user space. */ cam_periph_unmapmem(inccb, &mapinfo); inccb->ccb_h.path = old_path; error = 0; break; } default: error = ENOTSUP; break; } xpt_release_bus(bus); break; } /* * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input, * with the periphal driver name and unit name filled in. The other * fields don't really matter as input. The passthrough driver name * ("pass"), and unit number are passed back in the ccb. The current * device generation number, and the index into the device peripheral * driver list, and the status are also passed back. Note that * since we do everything in one pass, unlike the XPT_GDEVLIST ccb, * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is * (or rather should be) impossible for the device peripheral driver * list to change since we look at the whole thing in one pass, and * we do it with lock protection. * */ case CAMGETPASSTHRU: { union ccb *ccb; struct cam_periph *periph; struct periph_driver **p_drv; char *name; u_int unit; u_int cur_generation; int base_periph_found; int splbreaknum; ccb = (union ccb *)ap->a_data; unit = ccb->cgdl.unit_number; name = ccb->cgdl.periph_name; /* * Every 100 devices, we want to drop our lock protection to * give the software interrupt handler a chance to run. * Most systems won't run into this check, but this should * avoid starvation in the software interrupt handler in * large systems. */ splbreaknum = 100; ccb = (union ccb *)ap->a_data; base_periph_found = 0; /* * Sanity check -- make sure we don't get a null peripheral * driver name. */ if (*ccb->cgdl.periph_name == '\0') { error = EINVAL; break; } /* Keep the list from changing while we traverse it */ lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); ptstartover: cur_generation = xsoftc.xpt_generation; /* first find our driver in the list of drivers */ for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) { if (strcmp((*p_drv)->driver_name, name) == 0) break; } if (*p_drv == NULL) { lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); ccb->ccb_h.status = CAM_REQ_CMP_ERR; ccb->cgdl.status = CAM_GDEVLIST_ERROR; *ccb->cgdl.periph_name = '\0'; ccb->cgdl.unit_number = 0; error = ENOENT; break; } /* * Run through every peripheral instance of this driver * and check to see whether it matches the unit passed * in by the user. If it does, get out of the loops and * find the passthrough driver associated with that * peripheral driver. */ TAILQ_FOREACH(periph, &(*p_drv)->units, unit_links) { if (periph->unit_number == unit) { break; } else if (--splbreaknum == 0) { lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); splbreaknum = 100; if (cur_generation != xsoftc.xpt_generation) goto ptstartover; } } /* * If we found the peripheral driver that the user passed * in, go through all of the peripheral drivers for that * particular device and look for a passthrough driver. */ if (periph != NULL) { struct cam_ed *device; int i; base_periph_found = 1; device = periph->path->device; for (i = 0, periph = SLIST_FIRST(&device->periphs); periph != NULL; periph = SLIST_NEXT(periph, periph_links), i++) { /* * Check to see whether we have a * passthrough device or not. */ if (strcmp(periph->periph_name, "pass") == 0) { /* * Fill in the getdevlist fields. */ strcpy(ccb->cgdl.periph_name, periph->periph_name); ccb->cgdl.unit_number = periph->unit_number; if (SLIST_NEXT(periph, periph_links)) ccb->cgdl.status = CAM_GDEVLIST_MORE_DEVS; else ccb->cgdl.status = CAM_GDEVLIST_LAST_DEVICE; ccb->cgdl.generation = device->generation; ccb->cgdl.index = i; /* * Fill in some CCB header fields * that the user may want. */ ccb->ccb_h.path_id = periph->path->bus->path_id; ccb->ccb_h.target_id = periph->path->target->target_id; ccb->ccb_h.target_lun = periph->path->device->lun_id; ccb->ccb_h.status = CAM_REQ_CMP; break; } } } /* * If the periph is null here, one of two things has * happened. The first possibility is that we couldn't * find the unit number of the particular peripheral driver * that the user is asking about. e.g. the user asks for * the passthrough driver for "da11". We find the list of * "da" peripherals all right, but there is no unit 11. * The other possibility is that we went through the list * of peripheral drivers attached to the device structure, * but didn't find one with the name "pass". Either way, * we return ENOENT, since we couldn't find something. */ if (periph == NULL) { ccb->ccb_h.status = CAM_REQ_CMP_ERR; ccb->cgdl.status = CAM_GDEVLIST_ERROR; *ccb->cgdl.periph_name = '\0'; ccb->cgdl.unit_number = 0; error = ENOENT; /* * It is unfortunate that this is even necessary, * but there are many, many clueless users out there. * If this is true, the user is looking for the * passthrough driver, but doesn't have one in his * kernel. */ if (base_periph_found == 1) { kprintf("xptioctl: pass driver is not in the " "kernel\n"); kprintf("xptioctl: put \"device pass\" in " "your kernel config file\n"); } } lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); break; } default: error = ENOTTY; break; } return(error); } static int cam_module_event_handler(module_t mod, int what, void *arg) { int error; switch (what) { case MOD_LOAD: if ((error = xpt_init(NULL)) != 0) return (error); break; case MOD_UNLOAD: return EBUSY; default: return EOPNOTSUPP; } return 0; } /* * Thread to handle asynchronous main-context requests. * * This function is typically used by drivers to perform complex actions * such as bus scans and engineering requests in a main context instead * of an interrupt context. */ static void xpt_scanner_thread(void *dummy) { union ccb *ccb; struct cam_sim *sim; get_mplock(); for (;;) { xpt_lock_buses(); xsoftc.ccb_scanq_running = 1; while ((ccb = (void *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) { TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe); xpt_unlock_buses(); sim = ccb->ccb_h.path->bus->sim; CAM_SIM_LOCK(sim); xpt_action(ccb); CAM_SIM_UNLOCK(sim); xpt_lock_buses(); } xsoftc.ccb_scanq_running = 0; tsleep_interlock(&xsoftc.ccb_scanq, 0); xpt_unlock_buses(); tsleep(&xsoftc.ccb_scanq, PINTERLOCKED, "ccb_scanq", 0); } rel_mplock(); /* not reached */ } /* * Issue an asynchronous asction */ void xpt_action_async(union ccb *ccb) { xpt_lock_buses(); TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe); if (xsoftc.ccb_scanq_running == 0) { xsoftc.ccb_scanq_running = 1; wakeup(&xsoftc.ccb_scanq); } xpt_unlock_buses(); } /* Functions accessed by the peripheral drivers */ static int xpt_init(void *dummy) { struct cam_sim *xpt_sim; struct cam_path *path; struct cam_devq *devq; cam_status status; TAILQ_INIT(&xsoftc.xpt_busses); TAILQ_INIT(&cam_simq); TAILQ_INIT(&xsoftc.ccb_scanq); STAILQ_INIT(&xsoftc.highpowerq); xsoftc.num_highpower = CAM_MAX_HIGHPOWER; spin_init(&cam_simq_spin); lockinit(&xsoftc.xpt_lock, "XPT lock", 0, LK_CANRECURSE); lockinit(&xsoftc.xpt_topo_lock, "XPT topology lock", 0, LK_CANRECURSE); SLIST_INIT(&cam_dead_sim.ccb_freeq); TAILQ_INIT(&cam_dead_sim.sim_doneq); spin_init(&cam_dead_sim.sim_spin); cam_dead_sim.sim_action = dead_sim_action; cam_dead_sim.sim_poll = dead_sim_poll; cam_dead_sim.sim_name = "dead_sim"; cam_dead_sim.lock = &cam_dead_lock; lockinit(&cam_dead_lock, "XPT dead_sim lock", 0, LK_CANRECURSE); cam_dead_sim.flags |= CAM_SIM_DEREGISTERED; /* * The xpt layer is, itself, the equivelent of a SIM. * Allow 16 ccbs in the ccb pool for it. This should * give decent parallelism when we probe busses and * perform other XPT functions. */ devq = cam_simq_alloc(16); xpt_sim = cam_sim_alloc(xptaction, xptpoll, "xpt", /*softc*/NULL, /*unit*/0, /*lock*/&xsoftc.xpt_lock, /*max_dev_transactions*/0, /*max_tagged_dev_transactions*/0, devq); cam_simq_release(devq); if (xpt_sim == NULL) return (ENOMEM); xpt_sim->max_ccbs = 16; lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); if ((status = xpt_bus_register(xpt_sim, /*bus #*/0)) != CAM_SUCCESS) { lockmgr(&xsoftc.xpt_lock, LK_RELEASE); kprintf("xpt_init: xpt_bus_register failed with status %#x," " failing attach\n", status); return (EINVAL); } /* * Looking at the XPT from the SIM layer, the XPT is * the equivelent of a peripheral driver. Allocate * a peripheral driver entry for us. */ if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID, CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD)) != CAM_REQ_CMP) { lockmgr(&xsoftc.xpt_lock, LK_RELEASE); kprintf("xpt_init: xpt_create_path failed with status %#x," " failing attach\n", status); return (EINVAL); } cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO, path, NULL, 0, xpt_sim); xpt_free_path(path); lockmgr(&xsoftc.xpt_lock, LK_RELEASE); /* * Register a callback for when interrupts are enabled. */ xsoftc.xpt_config_hook = kmalloc(sizeof(struct intr_config_hook), M_CAMXPT, M_INTWAIT | M_ZERO); xsoftc.xpt_config_hook->ich_func = xpt_config; xsoftc.xpt_config_hook->ich_desc = "xpt"; xsoftc.xpt_config_hook->ich_order = 1000; if (config_intrhook_establish(xsoftc.xpt_config_hook) != 0) { kfree (xsoftc.xpt_config_hook, M_CAMXPT); kprintf("xpt_init: config_intrhook_establish failed " "- failing attach\n"); } /* fire up rescan thread */ if (kthread_create(xpt_scanner_thread, NULL, NULL, "xpt_thrd")) { kprintf("xpt_init: failed to create rescan thread\n"); } /* Install our software interrupt handlers */ register_swi(SWI_CAMBIO, swi_cambio, NULL, "swi_cambio", NULL, -1); return (0); } static cam_status xptregister(struct cam_periph *periph, void *arg) { struct cam_sim *xpt_sim; if (periph == NULL) { kprintf("xptregister: periph was NULL!!\n"); return(CAM_REQ_CMP_ERR); } xpt_sim = (struct cam_sim *)arg; xpt_sim->softc = periph; xpt_periph = periph; periph->softc = NULL; return(CAM_REQ_CMP); } int32_t xpt_add_periph(struct cam_periph *periph) { struct cam_ed *device; int32_t status; struct periph_list *periph_head; sim_lock_assert_owned(periph->sim->lock); device = periph->path->device; periph_head = &device->periphs; status = CAM_REQ_CMP; if (device != NULL) { /* * Make room for this peripheral * so it will fit in the queue * when it's scheduled to run */ status = camq_resize(&device->drvq, device->drvq.array_size + 1); device->generation++; SLIST_INSERT_HEAD(periph_head, periph, periph_links); } lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); xsoftc.xpt_generation++; lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); return (status); } void xpt_remove_periph(struct cam_periph *periph) { struct cam_ed *device; sim_lock_assert_owned(periph->sim->lock); device = periph->path->device; if (device != NULL) { struct periph_list *periph_head; periph_head = &device->periphs; /* Release the slot for this peripheral */ camq_resize(&device->drvq, device->drvq.array_size - 1); device->generation++; SLIST_REMOVE(periph_head, periph, cam_periph, periph_links); } lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); xsoftc.xpt_generation++; lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); } void xpt_announce_periph(struct cam_periph *periph, char *announce_string) { struct ccb_pathinq cpi; struct ccb_trans_settings cts; struct cam_path *path; u_int speed; u_int freq; u_int mb; sim_lock_assert_owned(periph->sim->lock); path = periph->path; /* Report basic attachment and inquiry data */ kprintf("%s%d at %s%d bus %d target %d lun %d\n", periph->periph_name, periph->unit_number, path->bus->sim->sim_name, path->bus->sim->unit_number, path->bus->sim->bus_id, path->target->target_id, path->device->lun_id); kprintf("%s%d: ", periph->periph_name, periph->unit_number); scsi_print_inquiry(&path->device->inq_data); /* Report serial number */ if (path->device->serial_num_len > 0) { /* Don't wrap the screen - print only the first 60 chars */ kprintf("%s%d: Serial Number %.60s\n", periph->periph_name, periph->unit_number, path->device->serial_num); } /* Acquire and report transfer speed */ xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1); cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; cts.type = CTS_TYPE_CURRENT_SETTINGS; xpt_action((union ccb*)&cts); if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { return; } /* Ask the SIM for its base transfer speed */ xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); cpi.ccb_h.func_code = XPT_PATH_INQ; xpt_action((union ccb *)&cpi); speed = cpi.base_transfer_speed; freq = 0; if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SPI) { struct ccb_trans_settings_spi *spi; spi = &cts.xport_specific.spi; if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) != 0 && spi->sync_offset != 0) { freq = scsi_calc_syncsrate(spi->sync_period); speed = freq; } if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0) speed *= (0x01 << spi->bus_width); } if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_FC) { struct ccb_trans_settings_fc *fc = &cts.xport_specific.fc; if (fc->valid & CTS_FC_VALID_SPEED) { speed = fc->bitrate; } } if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SAS) { struct ccb_trans_settings_sas *sas = &cts.xport_specific.sas; if (sas->valid & CTS_SAS_VALID_SPEED) { speed = sas->bitrate; } } mb = speed / 1000; if (mb > 0) kprintf("%s%d: %d.%03dMB/s transfers", periph->periph_name, periph->unit_number, mb, speed % 1000); else kprintf("%s%d: %dKB/s transfers", periph->periph_name, periph->unit_number, speed); /* Report additional information about SPI connections */ if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SPI) { struct ccb_trans_settings_spi *spi; spi = &cts.xport_specific.spi; if (freq != 0) { kprintf(" (%d.%03dMHz%s, offset %d", freq / 1000, freq % 1000, (spi->ppr_options & MSG_EXT_PPR_DT_REQ) != 0 ? " DT" : "", spi->sync_offset); } if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0 && spi->bus_width > 0) { if (freq != 0) { kprintf(", "); } else { kprintf(" ("); } kprintf("%dbit)", 8 * (0x01 << spi->bus_width)); } else if (freq != 0) { kprintf(")"); } } if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_FC) { struct ccb_trans_settings_fc *fc; fc = &cts.xport_specific.fc; if (fc->valid & CTS_FC_VALID_WWNN) kprintf(" WWNN 0x%llx", (long long) fc->wwnn); if (fc->valid & CTS_FC_VALID_WWPN) kprintf(" WWPN 0x%llx", (long long) fc->wwpn); if (fc->valid & CTS_FC_VALID_PORT) kprintf(" PortID 0x%x", fc->port); } if (path->device->inq_flags & SID_CmdQue || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { kprintf("\n%s%d: Command Queueing Enabled", periph->periph_name, periph->unit_number); } kprintf("\n"); /* * We only want to print the caller's announce string if they've * passed one in.. */ if (announce_string != NULL) kprintf("%s%d: %s\n", periph->periph_name, periph->unit_number, announce_string); } static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns, struct cam_eb *bus) { dev_match_ret retval; int i; retval = DM_RET_NONE; /* * If we aren't given something to match against, that's an error. */ if (bus == NULL) return(DM_RET_ERROR); /* * If there are no match entries, then this bus matches no * matter what. */ if ((patterns == NULL) || (num_patterns == 0)) return(DM_RET_DESCEND | DM_RET_COPY); for (i = 0; i < num_patterns; i++) { struct bus_match_pattern *cur_pattern; /* * If the pattern in question isn't for a bus node, we * aren't interested. However, we do indicate to the * calling routine that we should continue descending the * tree, since the user wants to match against lower-level * EDT elements. */ if (patterns[i].type != DEV_MATCH_BUS) { if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) retval |= DM_RET_DESCEND; continue; } cur_pattern = &patterns[i].pattern.bus_pattern; /* * If they want to match any bus node, we give them any * device node. */ if (cur_pattern->flags == BUS_MATCH_ANY) { /* set the copy flag */ retval |= DM_RET_COPY; /* * If we've already decided on an action, go ahead * and return. */ if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) return(retval); } /* * Not sure why someone would do this... */ if (cur_pattern->flags == BUS_MATCH_NONE) continue; if (((cur_pattern->flags & BUS_MATCH_PATH) != 0) && (cur_pattern->path_id != bus->path_id)) continue; if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0) && (cur_pattern->bus_id != bus->sim->bus_id)) continue; if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0) && (cur_pattern->unit_number != bus->sim->unit_number)) continue; if (((cur_pattern->flags & BUS_MATCH_NAME) != 0) && (strncmp(cur_pattern->dev_name, bus->sim->sim_name, DEV_IDLEN) != 0)) continue; /* * If we get to this point, the user definitely wants * information on this bus. So tell the caller to copy the * data out. */ retval |= DM_RET_COPY; /* * If the return action has been set to descend, then we * know that we've already seen a non-bus matching * expression, therefore we need to further descend the tree. * This won't change by continuing around the loop, so we * go ahead and return. If we haven't seen a non-bus * matching expression, we keep going around the loop until * we exhaust the matching expressions. We'll set the stop * flag once we fall out of the loop. */ if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) return(retval); } /* * If the return action hasn't been set to descend yet, that means * we haven't seen anything other than bus matching patterns. So * tell the caller to stop descending the tree -- the user doesn't * want to match against lower level tree elements. */ if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) retval |= DM_RET_STOP; return(retval); } static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns, struct cam_ed *device) { dev_match_ret retval; int i; retval = DM_RET_NONE; /* * If we aren't given something to match against, that's an error. */ if (device == NULL) return(DM_RET_ERROR); /* * If there are no match entries, then this device matches no * matter what. */ if ((patterns == NULL) || (num_patterns == 0)) return(DM_RET_DESCEND | DM_RET_COPY); for (i = 0; i < num_patterns; i++) { struct device_match_pattern *cur_pattern; /* * If the pattern in question isn't for a device node, we * aren't interested. */ if (patterns[i].type != DEV_MATCH_DEVICE) { if ((patterns[i].type == DEV_MATCH_PERIPH) && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)) retval |= DM_RET_DESCEND; continue; } cur_pattern = &patterns[i].pattern.device_pattern; /* * If they want to match any device node, we give them any * device node. */ if (cur_pattern->flags == DEV_MATCH_ANY) { /* set the copy flag */ retval |= DM_RET_COPY; /* * If we've already decided on an action, go ahead * and return. */ if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) return(retval); } /* * Not sure why someone would do this... */ if (cur_pattern->flags == DEV_MATCH_NONE) continue; if (((cur_pattern->flags & DEV_MATCH_PATH) != 0) && (cur_pattern->path_id != device->target->bus->path_id)) continue; if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0) && (cur_pattern->target_id != device->target->target_id)) continue; if (((cur_pattern->flags & DEV_MATCH_LUN) != 0) && (cur_pattern->target_lun != device->lun_id)) continue; if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0) && (cam_quirkmatch((caddr_t)&device->inq_data, (caddr_t)&cur_pattern->inq_pat, 1, sizeof(cur_pattern->inq_pat), scsi_static_inquiry_match) == NULL)) continue; /* * If we get to this point, the user definitely wants * information on this device. So tell the caller to copy * the data out. */ retval |= DM_RET_COPY; /* * If the return action has been set to descend, then we * know that we've already seen a peripheral matching * expression, therefore we need to further descend the tree. * This won't change by continuing around the loop, so we * go ahead and return. If we haven't seen a peripheral * matching expression, we keep going around the loop until * we exhaust the matching expressions. We'll set the stop * flag once we fall out of the loop. */ if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) return(retval); } /* * If the return action hasn't been set to descend yet, that means * we haven't seen any peripheral matching patterns. So tell the * caller to stop descending the tree -- the user doesn't want to * match against lower level tree elements. */ if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) retval |= DM_RET_STOP; return(retval); } /* * Match a single peripheral against any number of match patterns. */ static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns, struct cam_periph *periph) { dev_match_ret retval; int i; /* * If we aren't given something to match against, that's an error. */ if (periph == NULL) return(DM_RET_ERROR); /* * If there are no match entries, then this peripheral matches no * matter what. */ if ((patterns == NULL) || (num_patterns == 0)) return(DM_RET_STOP | DM_RET_COPY); /* * There aren't any nodes below a peripheral node, so there's no * reason to descend the tree any further. */ retval = DM_RET_STOP; for (i = 0; i < num_patterns; i++) { struct periph_match_pattern *cur_pattern; /* * If the pattern in question isn't for a peripheral, we * aren't interested. */ if (patterns[i].type != DEV_MATCH_PERIPH) continue; cur_pattern = &patterns[i].pattern.periph_pattern; /* * If they want to match on anything, then we will do so. */ if (cur_pattern->flags == PERIPH_MATCH_ANY) { /* set the copy flag */ retval |= DM_RET_COPY; /* * We've already set the return action to stop, * since there are no nodes below peripherals in * the tree. */ return(retval); } /* * Not sure why someone would do this... */ if (cur_pattern->flags == PERIPH_MATCH_NONE) continue; if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0) && (cur_pattern->path_id != periph->path->bus->path_id)) continue; /* * For the target and lun id's, we have to make sure the * target and lun pointers aren't NULL. The xpt peripheral * has a wildcard target and device. */ if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0) && ((periph->path->target == NULL) ||(cur_pattern->target_id != periph->path->target->target_id))) continue; if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0) && ((periph->path->device == NULL) || (cur_pattern->target_lun != periph->path->device->lun_id))) continue; if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0) && (cur_pattern->unit_number != periph->unit_number)) continue; if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0) && (strncmp(cur_pattern->periph_name, periph->periph_name, DEV_IDLEN) != 0)) continue; /* * If we get to this point, the user definitely wants * information on this peripheral. So tell the caller to * copy the data out. */ retval |= DM_RET_COPY; /* * The return action has already been set to stop, since * peripherals don't have any nodes below them in the EDT. */ return(retval); } /* * If we get to this point, the peripheral that was passed in * doesn't match any of the patterns. */ return(retval); } static int xptedtbusfunc(struct cam_eb *bus, void *arg) { struct ccb_dev_match *cdm; dev_match_ret retval; cdm = (struct ccb_dev_match *)arg; /* * If our position is for something deeper in the tree, that means * that we've already seen this node. So, we keep going down. */ if ((cdm->pos.position_type & CAM_DEV_POS_BUS) && (cdm->pos.cookie.bus == bus) && (cdm->pos.position_type & CAM_DEV_POS_TARGET) && (cdm->pos.cookie.target != NULL)) retval = DM_RET_DESCEND; else retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus); /* * If we got an error, bail out of the search. */ if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { cdm->status = CAM_DEV_MATCH_ERROR; return(0); } /* * If the copy flag is set, copy this bus out. */ if (retval & DM_RET_COPY) { int spaceleft, j; spaceleft = cdm->match_buf_len - (cdm->num_matches * sizeof(struct dev_match_result)); /* * If we don't have enough space to put in another * match result, save our position and tell the * user there are more devices to check. */ if (spaceleft < sizeof(struct dev_match_result)) { bzero(&cdm->pos, sizeof(cdm->pos)); cdm->pos.position_type = CAM_DEV_POS_EDT | CAM_DEV_POS_BUS; cdm->pos.cookie.bus = bus; cdm->pos.generations[CAM_BUS_GENERATION]= xsoftc.bus_generation; cdm->status = CAM_DEV_MATCH_MORE; return(0); } j = cdm->num_matches; cdm->num_matches++; cdm->matches[j].type = DEV_MATCH_BUS; cdm->matches[j].result.bus_result.path_id = bus->path_id; cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id; cdm->matches[j].result.bus_result.unit_number = bus->sim->unit_number; strncpy(cdm->matches[j].result.bus_result.dev_name, bus->sim->sim_name, DEV_IDLEN); } /* * If the user is only interested in busses, there's no * reason to descend to the next level in the tree. */ if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) return(1); /* * If there is a target generation recorded, check it to * make sure the target list hasn't changed. */ if ((cdm->pos.position_type & CAM_DEV_POS_BUS) && (bus == cdm->pos.cookie.bus) && (cdm->pos.position_type & CAM_DEV_POS_TARGET) && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0) && (cdm->pos.generations[CAM_TARGET_GENERATION] != bus->generation)) { cdm->status = CAM_DEV_MATCH_LIST_CHANGED; return(0); } if ((cdm->pos.position_type & CAM_DEV_POS_BUS) && (cdm->pos.cookie.bus == bus) && (cdm->pos.position_type & CAM_DEV_POS_TARGET) && (cdm->pos.cookie.target != NULL)) return(xpttargettraverse(bus, (struct cam_et *)cdm->pos.cookie.target, xptedttargetfunc, arg)); else return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg)); } static int xptedttargetfunc(struct cam_et *target, void *arg) { struct ccb_dev_match *cdm; cdm = (struct ccb_dev_match *)arg; /* * If there is a device list generation recorded, check it to * make sure the device list hasn't changed. */ if ((cdm->pos.position_type & CAM_DEV_POS_BUS) && (cdm->pos.cookie.bus == target->bus) && (cdm->pos.position_type & CAM_DEV_POS_TARGET) && (cdm->pos.cookie.target == target) && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) && (cdm->pos.generations[CAM_DEV_GENERATION] != 0) && (cdm->pos.generations[CAM_DEV_GENERATION] != target->generation)) { cdm->status = CAM_DEV_MATCH_LIST_CHANGED; return(0); } if ((cdm->pos.position_type & CAM_DEV_POS_BUS) && (cdm->pos.cookie.bus == target->bus) && (cdm->pos.position_type & CAM_DEV_POS_TARGET) && (cdm->pos.cookie.target == target) && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) && (cdm->pos.cookie.device != NULL)) return(xptdevicetraverse(target, (struct cam_ed *)cdm->pos.cookie.device, xptedtdevicefunc, arg)); else return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg)); } static int xptedtdevicefunc(struct cam_ed *device, void *arg) { struct ccb_dev_match *cdm; dev_match_ret retval; cdm = (struct ccb_dev_match *)arg; /* * If our position is for something deeper in the tree, that means * that we've already seen this node. So, we keep going down. */ if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE) && (cdm->pos.cookie.device == device) && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) && (cdm->pos.cookie.periph != NULL)) retval = DM_RET_DESCEND; else retval = xptdevicematch(cdm->patterns, cdm->num_patterns, device); if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { cdm->status = CAM_DEV_MATCH_ERROR; return(0); } /* * If the copy flag is set, copy this device out. */ if (retval & DM_RET_COPY) { int spaceleft, j; spaceleft = cdm->match_buf_len - (cdm->num_matches * sizeof(struct dev_match_result)); /* * If we don't have enough space to put in another * match result, save our position and tell the * user there are more devices to check. */ if (spaceleft < sizeof(struct dev_match_result)) { bzero(&cdm->pos, sizeof(cdm->pos)); cdm->pos.position_type = CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE; cdm->pos.cookie.bus = device->target->bus; cdm->pos.generations[CAM_BUS_GENERATION]= xsoftc.bus_generation; cdm->pos.cookie.target = device->target; cdm->pos.generations[CAM_TARGET_GENERATION] = device->target->bus->generation; cdm->pos.cookie.device = device; cdm->pos.generations[CAM_DEV_GENERATION] = device->target->generation; cdm->status = CAM_DEV_MATCH_MORE; return(0); } j = cdm->num_matches; cdm->num_matches++; cdm->matches[j].type = DEV_MATCH_DEVICE; cdm->matches[j].result.device_result.path_id = device->target->bus->path_id; cdm->matches[j].result.device_result.target_id = device->target->target_id; cdm->matches[j].result.device_result.target_lun = device->lun_id; bcopy(&device->inq_data, &cdm->matches[j].result.device_result.inq_data, sizeof(struct scsi_inquiry_data)); /* Let the user know whether this device is unconfigured */ if (device->flags & CAM_DEV_UNCONFIGURED) cdm->matches[j].result.device_result.flags = DEV_RESULT_UNCONFIGURED; else cdm->matches[j].result.device_result.flags = DEV_RESULT_NOFLAG; } /* * If the user isn't interested in peripherals, don't descend * the tree any further. */ if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) return(1); /* * If there is a peripheral list generation recorded, make sure * it hasn't changed. */ if ((cdm->pos.position_type & CAM_DEV_POS_BUS) && (device->target->bus == cdm->pos.cookie.bus) && (cdm->pos.position_type & CAM_DEV_POS_TARGET) && (device->target == cdm->pos.cookie.target) && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) && (device == cdm->pos.cookie.device) && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) && (cdm->pos.generations[CAM_PERIPH_GENERATION] != device->generation)){ cdm->status = CAM_DEV_MATCH_LIST_CHANGED; return(0); } if ((cdm->pos.position_type & CAM_DEV_POS_BUS) && (cdm->pos.cookie.bus == device->target->bus) && (cdm->pos.position_type & CAM_DEV_POS_TARGET) && (cdm->pos.cookie.target == device->target) && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) && (cdm->pos.cookie.device == device) && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) && (cdm->pos.cookie.periph != NULL)) return(xptperiphtraverse(device, (struct cam_periph *)cdm->pos.cookie.periph, xptedtperiphfunc, arg)); else return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg)); } static int xptedtperiphfunc(struct cam_periph *periph, void *arg) { struct ccb_dev_match *cdm; dev_match_ret retval; cdm = (struct ccb_dev_match *)arg; retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { cdm->status = CAM_DEV_MATCH_ERROR; return(0); } /* * If the copy flag is set, copy this peripheral out. */ if (retval & DM_RET_COPY) { int spaceleft, j; spaceleft = cdm->match_buf_len - (cdm->num_matches * sizeof(struct dev_match_result)); /* * If we don't have enough space to put in another * match result, save our position and tell the * user there are more devices to check. */ if (spaceleft < sizeof(struct dev_match_result)) { bzero(&cdm->pos, sizeof(cdm->pos)); cdm->pos.position_type = CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE | CAM_DEV_POS_PERIPH; cdm->pos.cookie.bus = periph->path->bus; cdm->pos.generations[CAM_BUS_GENERATION]= xsoftc.bus_generation; cdm->pos.cookie.target = periph->path->target; cdm->pos.generations[CAM_TARGET_GENERATION] = periph->path->bus->generation; cdm->pos.cookie.device = periph->path->device; cdm->pos.generations[CAM_DEV_GENERATION] = periph->path->target->generation; cdm->pos.cookie.periph = periph; cdm->pos.generations[CAM_PERIPH_GENERATION] = periph->path->device->generation; cdm->status = CAM_DEV_MATCH_MORE; return(0); } j = cdm->num_matches; cdm->num_matches++; cdm->matches[j].type = DEV_MATCH_PERIPH; cdm->matches[j].result.periph_result.path_id = periph->path->bus->path_id; cdm->matches[j].result.periph_result.target_id = periph->path->target->target_id; cdm->matches[j].result.periph_result.target_lun = periph->path->device->lun_id; cdm->matches[j].result.periph_result.unit_number = periph->unit_number; strncpy(cdm->matches[j].result.periph_result.periph_name, periph->periph_name, DEV_IDLEN); } return(1); } static int xptedtmatch(struct ccb_dev_match *cdm) { int ret; cdm->num_matches = 0; /* * Check the bus list generation. If it has changed, the user * needs to reset everything and start over. */ if ((cdm->pos.position_type & CAM_DEV_POS_BUS) && (cdm->pos.generations[CAM_BUS_GENERATION] != 0) && (cdm->pos.generations[CAM_BUS_GENERATION] != xsoftc.bus_generation)) { cdm->status = CAM_DEV_MATCH_LIST_CHANGED; return(0); } if ((cdm->pos.position_type & CAM_DEV_POS_BUS) && (cdm->pos.cookie.bus != NULL)) ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus, xptedtbusfunc, cdm); else ret = xptbustraverse(NULL, xptedtbusfunc, cdm); /* * If we get back 0, that means that we had to stop before fully * traversing the EDT. It also means that one of the subroutines * has set the status field to the proper value. If we get back 1, * we've fully traversed the EDT and copied out any matching entries. */ if (ret == 1) cdm->status = CAM_DEV_MATCH_LAST; return(ret); } static int xptplistpdrvfunc(struct periph_driver **pdrv, void *arg) { struct ccb_dev_match *cdm; cdm = (struct ccb_dev_match *)arg; if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) && (cdm->pos.cookie.pdrv == pdrv) && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) && (cdm->pos.generations[CAM_PERIPH_GENERATION] != (*pdrv)->generation)) { cdm->status = CAM_DEV_MATCH_LIST_CHANGED; return(0); } if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) && (cdm->pos.cookie.pdrv == pdrv) && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) && (cdm->pos.cookie.periph != NULL)) return(xptpdperiphtraverse(pdrv, (struct cam_periph *)cdm->pos.cookie.periph, xptplistperiphfunc, arg)); else return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg)); } static int xptplistperiphfunc(struct cam_periph *periph, void *arg) { struct ccb_dev_match *cdm; dev_match_ret retval; cdm = (struct ccb_dev_match *)arg; retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { cdm->status = CAM_DEV_MATCH_ERROR; return(0); } /* * If the copy flag is set, copy this peripheral out. */ if (retval & DM_RET_COPY) { int spaceleft, j; spaceleft = cdm->match_buf_len - (cdm->num_matches * sizeof(struct dev_match_result)); /* * If we don't have enough space to put in another * match result, save our position and tell the * user there are more devices to check. */ if (spaceleft < sizeof(struct dev_match_result)) { struct periph_driver **pdrv; pdrv = NULL; bzero(&cdm->pos, sizeof(cdm->pos)); cdm->pos.position_type = CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR | CAM_DEV_POS_PERIPH; /* * This may look a bit non-sensical, but it is * actually quite logical. There are very few * peripheral drivers, and bloating every peripheral * structure with a pointer back to its parent * peripheral driver linker set entry would cost * more in the long run than doing this quick lookup. */ for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) { if (strcmp((*pdrv)->driver_name, periph->periph_name) == 0) break; } if (*pdrv == NULL) { cdm->status = CAM_DEV_MATCH_ERROR; return(0); } cdm->pos.cookie.pdrv = pdrv; /* * The periph generation slot does double duty, as * does the periph pointer slot. They are used for * both edt and pdrv lookups and positioning. */ cdm->pos.cookie.periph = periph; cdm->pos.generations[CAM_PERIPH_GENERATION] = (*pdrv)->generation; cdm->status = CAM_DEV_MATCH_MORE; return(0); } j = cdm->num_matches; cdm->num_matches++; cdm->matches[j].type = DEV_MATCH_PERIPH; cdm->matches[j].result.periph_result.path_id = periph->path->bus->path_id; /* * The transport layer peripheral doesn't have a target or * lun. */ if (periph->path->target) cdm->matches[j].result.periph_result.target_id = periph->path->target->target_id; else cdm->matches[j].result.periph_result.target_id = -1; if (periph->path->device) cdm->matches[j].result.periph_result.target_lun = periph->path->device->lun_id; else cdm->matches[j].result.periph_result.target_lun = -1; cdm->matches[j].result.periph_result.unit_number = periph->unit_number; strncpy(cdm->matches[j].result.periph_result.periph_name, periph->periph_name, DEV_IDLEN); } return(1); } static int xptperiphlistmatch(struct ccb_dev_match *cdm) { int ret; cdm->num_matches = 0; /* * At this point in the edt traversal function, we check the bus * list generation to make sure that no busses have been added or * removed since the user last sent a XPT_DEV_MATCH ccb through. * For the peripheral driver list traversal function, however, we * don't have to worry about new peripheral driver types coming or * going; they're in a linker set, and therefore can't change * without a recompile. */ if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) && (cdm->pos.cookie.pdrv != NULL)) ret = xptpdrvtraverse( (struct periph_driver **)cdm->pos.cookie.pdrv, xptplistpdrvfunc, cdm); else ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm); /* * If we get back 0, that means that we had to stop before fully * traversing the peripheral driver tree. It also means that one of * the subroutines has set the status field to the proper value. If * we get back 1, we've fully traversed the EDT and copied out any * matching entries. */ if (ret == 1) cdm->status = CAM_DEV_MATCH_LAST; return(ret); } static int xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg) { struct cam_eb *bus, *next_bus; int retval; retval = 1; lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xsoftc.xpt_busses)); bus != NULL; bus = next_bus) { next_bus = TAILQ_NEXT(bus, links); lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); CAM_SIM_LOCK(bus->sim); retval = tr_func(bus, arg); CAM_SIM_UNLOCK(bus->sim); if (retval == 0) return(retval); lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); } lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); return(retval); } static int xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target, xpt_targetfunc_t *tr_func, void *arg) { struct cam_et *target, *next_target; int retval; retval = 1; for (target = (start_target ? start_target : TAILQ_FIRST(&bus->et_entries)); target != NULL; target = next_target) { next_target = TAILQ_NEXT(target, links); retval = tr_func(target, arg); if (retval == 0) return(retval); } return(retval); } static int xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device, xpt_devicefunc_t *tr_func, void *arg) { struct cam_ed *device, *next_device; int retval; retval = 1; for (device = (start_device ? start_device : TAILQ_FIRST(&target->ed_entries)); device != NULL; device = next_device) { next_device = TAILQ_NEXT(device, links); retval = tr_func(device, arg); if (retval == 0) return(retval); } return(retval); } static int xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph, xpt_periphfunc_t *tr_func, void *arg) { struct cam_periph *periph, *next_periph; int retval; retval = 1; for (periph = (start_periph ? start_periph : SLIST_FIRST(&device->periphs)); periph != NULL; periph = next_periph) { next_periph = SLIST_NEXT(periph, periph_links); retval = tr_func(periph, arg); if (retval == 0) return(retval); } return(retval); } static int xptpdrvtraverse(struct periph_driver **start_pdrv, xpt_pdrvfunc_t *tr_func, void *arg) { struct periph_driver **pdrv; int retval; retval = 1; /* * We don't traverse the peripheral driver list like we do the * other lists, because it is a linker set, and therefore cannot be * changed during runtime. If the peripheral driver list is ever * re-done to be something other than a linker set (i.e. it can * change while the system is running), the list traversal should * be modified to work like the other traversal functions. */ for (pdrv = (start_pdrv ? start_pdrv : periph_drivers); *pdrv != NULL; pdrv++) { retval = tr_func(pdrv, arg); if (retval == 0) return(retval); } return(retval); } static int xptpdperiphtraverse(struct periph_driver **pdrv, struct cam_periph *start_periph, xpt_periphfunc_t *tr_func, void *arg) { struct cam_periph *periph, *next_periph; int retval; retval = 1; for (periph = (start_periph ? start_periph : TAILQ_FIRST(&(*pdrv)->units)); periph != NULL; periph = next_periph) { next_periph = TAILQ_NEXT(periph, unit_links); retval = tr_func(periph, arg); if (retval == 0) return(retval); } return(retval); } static int xptdefbusfunc(struct cam_eb *bus, void *arg) { struct xpt_traverse_config *tr_config; tr_config = (struct xpt_traverse_config *)arg; if (tr_config->depth == XPT_DEPTH_BUS) { xpt_busfunc_t *tr_func; tr_func = (xpt_busfunc_t *)tr_config->tr_func; return(tr_func(bus, tr_config->tr_arg)); } else return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg)); } static int xptdeftargetfunc(struct cam_et *target, void *arg) { struct xpt_traverse_config *tr_config; tr_config = (struct xpt_traverse_config *)arg; if (tr_config->depth == XPT_DEPTH_TARGET) { xpt_targetfunc_t *tr_func; tr_func = (xpt_targetfunc_t *)tr_config->tr_func; return(tr_func(target, tr_config->tr_arg)); } else return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg)); } static int xptdefdevicefunc(struct cam_ed *device, void *arg) { struct xpt_traverse_config *tr_config; tr_config = (struct xpt_traverse_config *)arg; if (tr_config->depth == XPT_DEPTH_DEVICE) { xpt_devicefunc_t *tr_func; tr_func = (xpt_devicefunc_t *)tr_config->tr_func; return(tr_func(device, tr_config->tr_arg)); } else return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg)); } static int xptdefperiphfunc(struct cam_periph *periph, void *arg) { struct xpt_traverse_config *tr_config; xpt_periphfunc_t *tr_func; tr_config = (struct xpt_traverse_config *)arg; tr_func = (xpt_periphfunc_t *)tr_config->tr_func; /* * Unlike the other default functions, we don't check for depth * here. The peripheral driver level is the last level in the EDT, * so if we're here, we should execute the function in question. */ return(tr_func(periph, tr_config->tr_arg)); } /* * Execute the given function for every bus in the EDT. */ static int xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg) { struct xpt_traverse_config tr_config; tr_config.depth = XPT_DEPTH_BUS; tr_config.tr_func = tr_func; tr_config.tr_arg = arg; return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); } /* * Execute the given function for every device in the EDT. */ static int xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg) { struct xpt_traverse_config tr_config; tr_config.depth = XPT_DEPTH_DEVICE; tr_config.tr_func = tr_func; tr_config.tr_arg = arg; return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); } static int xptsetasyncfunc(struct cam_ed *device, void *arg) { struct cam_path path; struct ccb_getdev cgd; struct async_node *cur_entry; cur_entry = (struct async_node *)arg; /* * Don't report unconfigured devices (Wildcard devs, * devices only for target mode, device instances * that have been invalidated but are waiting for * their last reference count to be released). */ if ((device->flags & CAM_DEV_UNCONFIGURED) != 0) return (1); xpt_compile_path(&path, NULL, device->target->bus->path_id, device->target->target_id, device->lun_id); xpt_setup_ccb(&cgd.ccb_h, &path, /*priority*/1); cgd.ccb_h.func_code = XPT_GDEV_TYPE; xpt_action((union ccb *)&cgd); cur_entry->callback(cur_entry->callback_arg, AC_FOUND_DEVICE, &path, &cgd); xpt_release_path(&path); return(1); } static int xptsetasyncbusfunc(struct cam_eb *bus, void *arg) { struct cam_path path; struct ccb_pathinq cpi; struct async_node *cur_entry; cur_entry = (struct async_node *)arg; xpt_compile_path(&path, /*periph*/NULL, bus->sim->path_id, CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); cpi.ccb_h.func_code = XPT_PATH_INQ; xpt_action((union ccb *)&cpi); cur_entry->callback(cur_entry->callback_arg, AC_PATH_REGISTERED, &path, &cpi); xpt_release_path(&path); return(1); } static void xpt_action_sasync_cb(void *context, int pending) { struct async_node *cur_entry; struct xpt_task *task; uint32_t added; task = (struct xpt_task *)context; cur_entry = (struct async_node *)task->data1; added = task->data2; if ((added & AC_FOUND_DEVICE) != 0) { /* * Get this peripheral up to date with all * the currently existing devices. */ xpt_for_all_devices(xptsetasyncfunc, cur_entry); } if ((added & AC_PATH_REGISTERED) != 0) { /* * Get this peripheral up to date with all * the currently existing busses. */ xpt_for_all_busses(xptsetasyncbusfunc, cur_entry); } kfree(task, M_CAMXPT); } void xpt_action(union ccb *start_ccb) { CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n")); start_ccb->ccb_h.status = CAM_REQ_INPROG; switch (start_ccb->ccb_h.func_code) { case XPT_SCSI_IO: case XPT_TRIM: { struct cam_ed *device; #ifdef CAMDEBUG char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1]; struct cam_path *path; path = start_ccb->ccb_h.path; #endif /* * For the sake of compatibility with SCSI-1 * devices that may not understand the identify * message, we include lun information in the * second byte of all commands. SCSI-1 specifies * that luns are a 3 bit value and reserves only 3 * bits for lun information in the CDB. Later * revisions of the SCSI spec allow for more than 8 * luns, but have deprecated lun information in the * CDB. So, if the lun won't fit, we must omit. * * Also be aware that during initial probing for devices, * the inquiry information is unknown but initialized to 0. * This means that this code will be exercised while probing * devices with an ANSI revision greater than 2. */ device = start_ccb->ccb_h.path->device; if (device->protocol_version <= SCSI_REV_2 && start_ccb->ccb_h.target_lun < 8 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) { start_ccb->csio.cdb_io.cdb_bytes[1] |= start_ccb->ccb_h.target_lun << 5; } start_ccb->csio.scsi_status = SCSI_STATUS_OK; CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. CDB: %s\n", scsi_op_desc(start_ccb->csio.cdb_io.cdb_bytes[0], &path->device->inq_data), scsi_cdb_string(start_ccb->csio.cdb_io.cdb_bytes, cdb_str, sizeof(cdb_str)))); /* FALLTHROUGH */ } case XPT_TARGET_IO: case XPT_CONT_TARGET_IO: start_ccb->csio.sense_resid = 0; start_ccb->csio.resid = 0; /* FALLTHROUGH */ case XPT_RESET_DEV: case XPT_ENG_EXEC: { struct cam_path *path; struct cam_sim *sim; int runq; path = start_ccb->ccb_h.path; sim = path->bus->sim; if (sim == &cam_dead_sim) { /* The SIM has gone; just execute the CCB directly. */ cam_ccbq_send_ccb(&path->device->ccbq, start_ccb); (*(sim->sim_action))(sim, start_ccb); break; } cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb); if (path->device->qfrozen_cnt == 0) runq = xpt_schedule_dev_sendq(path->bus, path->device); else runq = 0; if (runq != 0) xpt_run_dev_sendq(path->bus); break; } case XPT_SET_TRAN_SETTINGS: { xpt_set_transfer_settings(&start_ccb->cts, start_ccb->ccb_h.path->device, /*async_update*/FALSE); break; } case XPT_CALC_GEOMETRY: { struct cam_sim *sim; /* Filter out garbage */ if (start_ccb->ccg.block_size == 0 || start_ccb->ccg.volume_size == 0) { start_ccb->ccg.cylinders = 0; start_ccb->ccg.heads = 0; start_ccb->ccg.secs_per_track = 0; start_ccb->ccb_h.status = CAM_REQ_CMP; break; } sim = start_ccb->ccb_h.path->bus->sim; (*(sim->sim_action))(sim, start_ccb); break; } case XPT_ABORT: { union ccb* abort_ccb; abort_ccb = start_ccb->cab.abort_ccb; if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) { if (abort_ccb->ccb_h.pinfo.index >= 0) { struct cam_ccbq *ccbq; ccbq = &abort_ccb->ccb_h.path->device->ccbq; cam_ccbq_remove_ccb(ccbq, abort_ccb); abort_ccb->ccb_h.status = CAM_REQ_ABORTED|CAM_DEV_QFRZN; xpt_freeze_devq(abort_ccb->ccb_h.path, 1); xpt_done(abort_ccb); start_ccb->ccb_h.status = CAM_REQ_CMP; break; } if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) { /* * We've caught this ccb en route to * the SIM. Flag it for abort and the * SIM will do so just before starting * real work on the CCB. */ abort_ccb->ccb_h.status = CAM_REQ_ABORTED|CAM_DEV_QFRZN; xpt_freeze_devq(abort_ccb->ccb_h.path, 1); start_ccb->ccb_h.status = CAM_REQ_CMP; break; } } if (XPT_FC_IS_QUEUED(abort_ccb) && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) { /* * It's already completed but waiting * for our SWI to get to it. */ start_ccb->ccb_h.status = CAM_UA_ABORT; break; } /* * If we weren't able to take care of the abort request * in the XPT, pass the request down to the SIM for processing. */ /* FALLTHROUGH */ } case XPT_ACCEPT_TARGET_IO: case XPT_EN_LUN: case XPT_IMMED_NOTIFY: case XPT_NOTIFY_ACK: case XPT_GET_TRAN_SETTINGS: case XPT_RESET_BUS: { struct cam_sim *sim; sim = start_ccb->ccb_h.path->bus->sim; (*(sim->sim_action))(sim, start_ccb); break; } case XPT_PATH_INQ: { struct cam_sim *sim; sim = start_ccb->ccb_h.path->bus->sim; (*(sim->sim_action))(sim, start_ccb); break; } case XPT_PATH_STATS: start_ccb->cpis.last_reset = start_ccb->ccb_h.path->bus->last_reset; start_ccb->ccb_h.status = CAM_REQ_CMP; break; case XPT_GDEV_TYPE: { struct cam_ed *dev; dev = start_ccb->ccb_h.path->device; if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; } else { struct ccb_getdev *cgd; struct cam_eb *bus; struct cam_et *tar; cgd = &start_ccb->cgd; bus = cgd->ccb_h.path->bus; tar = cgd->ccb_h.path->target; cgd->inq_data = dev->inq_data; cgd->ccb_h.status = CAM_REQ_CMP; cgd->serial_num_len = dev->serial_num_len; if ((dev->serial_num_len > 0) && (dev->serial_num != NULL)) bcopy(dev->serial_num, cgd->serial_num, dev->serial_num_len); } break; } case XPT_GDEV_STATS: { struct cam_ed *dev; dev = start_ccb->ccb_h.path->device; if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; } else { struct ccb_getdevstats *cgds; struct cam_eb *bus; struct cam_et *tar; cgds = &start_ccb->cgds; bus = cgds->ccb_h.path->bus; tar = cgds->ccb_h.path->target; cgds->dev_openings = dev->ccbq.dev_openings; cgds->dev_active = dev->ccbq.dev_active; cgds->devq_openings = dev->ccbq.devq_openings; cgds->devq_queued = dev->ccbq.queue.entries; cgds->held = dev->ccbq.held; cgds->last_reset = tar->last_reset; cgds->maxtags = dev->quirk->maxtags; cgds->mintags = dev->quirk->mintags; if (timevalcmp(&tar->last_reset, &bus->last_reset, <)) cgds->last_reset = bus->last_reset; cgds->ccb_h.status = CAM_REQ_CMP; } break; } case XPT_GDEVLIST: { struct cam_periph *nperiph; struct periph_list *periph_head; struct ccb_getdevlist *cgdl; u_int i; struct cam_ed *device; int found; found = 0; /* * Don't want anyone mucking with our data. */ device = start_ccb->ccb_h.path->device; periph_head = &device->periphs; cgdl = &start_ccb->cgdl; /* * Check and see if the list has changed since the user * last requested a list member. If so, tell them that the * list has changed, and therefore they need to start over * from the beginning. */ if ((cgdl->index != 0) && (cgdl->generation != device->generation)) { cgdl->status = CAM_GDEVLIST_LIST_CHANGED; break; } /* * Traverse the list of peripherals and attempt to find * the requested peripheral. */ for (nperiph = SLIST_FIRST(periph_head), i = 0; (nperiph != NULL) && (i <= cgdl->index); nperiph = SLIST_NEXT(nperiph, periph_links), i++) { if (i == cgdl->index) { strncpy(cgdl->periph_name, nperiph->periph_name, DEV_IDLEN); cgdl->unit_number = nperiph->unit_number; found = 1; } } if (found == 0) { cgdl->status = CAM_GDEVLIST_ERROR; break; } if (nperiph == NULL) cgdl->status = CAM_GDEVLIST_LAST_DEVICE; else cgdl->status = CAM_GDEVLIST_MORE_DEVS; cgdl->index++; cgdl->generation = device->generation; cgdl->ccb_h.status = CAM_REQ_CMP; break; } case XPT_DEV_MATCH: { dev_pos_type position_type; struct ccb_dev_match *cdm; int ret; cdm = &start_ccb->cdm; /* * There are two ways of getting at information in the EDT. * The first way is via the primary EDT tree. It starts * with a list of busses, then a list of targets on a bus, * then devices/luns on a target, and then peripherals on a * device/lun. The "other" way is by the peripheral driver * lists. The peripheral driver lists are organized by * peripheral driver. (obviously) So it makes sense to * use the peripheral driver list if the user is looking * for something like "da1", or all "da" devices. If the * user is looking for something on a particular bus/target * or lun, it's generally better to go through the EDT tree. */ if (cdm->pos.position_type != CAM_DEV_POS_NONE) position_type = cdm->pos.position_type; else { u_int i; position_type = CAM_DEV_POS_NONE; for (i = 0; i < cdm->num_patterns; i++) { if ((cdm->patterns[i].type == DEV_MATCH_BUS) ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){ position_type = CAM_DEV_POS_EDT; break; } } if (cdm->num_patterns == 0) position_type = CAM_DEV_POS_EDT; else if (position_type == CAM_DEV_POS_NONE) position_type = CAM_DEV_POS_PDRV; } switch(position_type & CAM_DEV_POS_TYPEMASK) { case CAM_DEV_POS_EDT: ret = xptedtmatch(cdm); break; case CAM_DEV_POS_PDRV: ret = xptperiphlistmatch(cdm); break; default: cdm->status = CAM_DEV_MATCH_ERROR; break; } if (cdm->status == CAM_DEV_MATCH_ERROR) start_ccb->ccb_h.status = CAM_REQ_CMP_ERR; else start_ccb->ccb_h.status = CAM_REQ_CMP; break; } case XPT_SASYNC_CB: { struct ccb_setasync *csa; struct async_node *cur_entry; struct async_list *async_head; u_int32_t added; csa = &start_ccb->csa; added = csa->event_enable; async_head = &csa->ccb_h.path->device->asyncs; /* * If there is already an entry for us, simply * update it. */ cur_entry = SLIST_FIRST(async_head); while (cur_entry != NULL) { if ((cur_entry->callback_arg == csa->callback_arg) && (cur_entry->callback == csa->callback)) break; cur_entry = SLIST_NEXT(cur_entry, links); } if (cur_entry != NULL) { /* * If the request has no flags set, * remove the entry. */ added &= ~cur_entry->event_enable; if (csa->event_enable == 0) { SLIST_REMOVE(async_head, cur_entry, async_node, links); csa->ccb_h.path->device->refcount--; kfree(cur_entry, M_CAMXPT); } else { cur_entry->event_enable = csa->event_enable; } } else { cur_entry = kmalloc(sizeof(*cur_entry), M_CAMXPT, M_INTWAIT); cur_entry->event_enable = csa->event_enable; cur_entry->callback_arg = csa->callback_arg; cur_entry->callback = csa->callback; SLIST_INSERT_HEAD(async_head, cur_entry, links); csa->ccb_h.path->device->refcount++; } /* * Need to decouple this operation via a taskqueue so that * the locking doesn't become a mess. */ if ((added & (AC_FOUND_DEVICE | AC_PATH_REGISTERED)) != 0) { struct xpt_task *task; task = kmalloc(sizeof(struct xpt_task), M_CAMXPT, M_INTWAIT); TASK_INIT(&task->task, 0, xpt_action_sasync_cb, task); task->data1 = cur_entry; task->data2 = added; taskqueue_enqueue(taskqueue_thread[mycpuid], &task->task); } start_ccb->ccb_h.status = CAM_REQ_CMP; break; } case XPT_REL_SIMQ: { struct ccb_relsim *crs; struct cam_ed *dev; crs = &start_ccb->crs; dev = crs->ccb_h.path->device; if (dev == NULL) { crs->ccb_h.status = CAM_DEV_NOT_THERE; break; } if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) { if (INQ_DATA_TQ_ENABLED(&dev->inq_data)) { /* Don't ever go below one opening */ if (crs->openings > 0) { xpt_dev_ccbq_resize(crs->ccb_h.path, crs->openings); if (bootverbose) { xpt_print(crs->ccb_h.path, "tagged openings now %d\n", crs->openings); } } } } if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) { if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { /* * Just extend the old timeout and decrement * the freeze count so that a single timeout * is sufficient for releasing the queue. */ start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; callout_stop(&dev->callout); } else { start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; } callout_reset(&dev->callout, (crs->release_timeout * hz) / 1000, xpt_release_devq_timeout, dev); dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING; } if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) { if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) { /* * Decrement the freeze count so that a single * completion is still sufficient to unfreeze * the queue. */ start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; } else { dev->flags |= CAM_DEV_REL_ON_COMPLETE; start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; } } if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) { if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 || (dev->ccbq.dev_active == 0)) { start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; } else { dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY; start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; } } if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) { xpt_release_devq(crs->ccb_h.path, /*count*/1, /*run_queue*/TRUE); } start_ccb->crs.qfrozen_cnt = dev->qfrozen_cnt; start_ccb->ccb_h.status = CAM_REQ_CMP; break; } case XPT_SCAN_BUS: xpt_scan_bus(start_ccb->ccb_h.path->periph, start_ccb); break; case XPT_SCAN_LUN: xpt_scan_lun(start_ccb->ccb_h.path->periph, start_ccb->ccb_h.path, start_ccb->crcn.flags, start_ccb); break; case XPT_DEBUG: { #ifdef CAMDEBUG #ifdef CAM_DEBUG_DELAY cam_debug_delay = CAM_DEBUG_DELAY; #endif cam_dflags = start_ccb->cdbg.flags; if (cam_dpath != NULL) { xpt_free_path(cam_dpath); cam_dpath = NULL; } if (cam_dflags != CAM_DEBUG_NONE) { if (xpt_create_path(&cam_dpath, xpt_periph, start_ccb->ccb_h.path_id, start_ccb->ccb_h.target_id, start_ccb->ccb_h.target_lun) != CAM_REQ_CMP) { start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; cam_dflags = CAM_DEBUG_NONE; } else { start_ccb->ccb_h.status = CAM_REQ_CMP; xpt_print(cam_dpath, "debugging flags now %x\n", cam_dflags); } } else { cam_dpath = NULL; start_ccb->ccb_h.status = CAM_REQ_CMP; } #else /* !CAMDEBUG */ start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; #endif /* CAMDEBUG */ break; } case XPT_NOOP: if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) xpt_freeze_devq(start_ccb->ccb_h.path, 1); start_ccb->ccb_h.status = CAM_REQ_CMP; break; default: case XPT_SDEV_TYPE: case XPT_TERM_IO: case XPT_ENG_INQ: /* XXX Implement */ start_ccb->ccb_h.status = CAM_PROVIDE_FAIL; break; } } void xpt_polled_action(union ccb *start_ccb) { u_int32_t timeout; struct cam_sim *sim; struct cam_devq *devq; struct cam_ed *dev; timeout = start_ccb->ccb_h.timeout; sim = start_ccb->ccb_h.path->bus->sim; devq = sim->devq; dev = start_ccb->ccb_h.path->device; sim_lock_assert_owned(sim->lock); /* * Steal an opening so that no other queued requests * can get it before us while we simulate interrupts. */ dev->ccbq.devq_openings--; dev->ccbq.dev_openings--; while(((devq && devq->send_openings <= 0) || dev->ccbq.dev_openings < 0) && (--timeout > 0)) { DELAY(1000); (*(sim->sim_poll))(sim); camisr_runqueue(sim); } dev->ccbq.devq_openings++; dev->ccbq.dev_openings++; if (timeout != 0) { xpt_action(start_ccb); while(--timeout > 0) { (*(sim->sim_poll))(sim); camisr_runqueue(sim); if ((start_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_INPROG) break; DELAY(1000); } if (timeout == 0) { /* * XXX Is it worth adding a sim_timeout entry * point so we can attempt recovery? If * this is only used for dumps, I don't think * it is. */ start_ccb->ccb_h.status = CAM_CMD_TIMEOUT; } } else { start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; } } /* * Schedule a peripheral driver to receive a ccb when it's * target device has space for more transactions. */ void xpt_schedule(struct cam_periph *perph, u_int32_t new_priority) { struct cam_ed *device; union ccb *work_ccb; int runq; sim_lock_assert_owned(perph->sim->lock); CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n")); device = perph->path->device; if (periph_is_queued(perph)) { /* Simply reorder based on new priority */ CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, (" change priority to %d\n", new_priority)); if (new_priority < perph->pinfo.priority) { camq_change_priority(&device->drvq, perph->pinfo.index, new_priority); } runq = 0; } else if (perph->path->bus->sim == &cam_dead_sim) { /* The SIM is gone so just call periph_start directly. */ work_ccb = xpt_get_ccb(perph->path->device); if (work_ccb == NULL) return; /* XXX */ xpt_setup_ccb(&work_ccb->ccb_h, perph->path, new_priority); perph->pinfo.priority = new_priority; perph->periph_start(perph, work_ccb); return; } else { /* New entry on the queue */ CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, (" added periph to queue\n")); perph->pinfo.priority = new_priority; perph->pinfo.generation = ++device->drvq.generation; camq_insert(&device->drvq, &perph->pinfo); runq = xpt_schedule_dev_allocq(perph->path->bus, device); } if (runq != 0) { CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, (" calling xpt_run_devq\n")); xpt_run_dev_allocq(perph->path->bus); } } /* * Schedule a device to run on a given queue. * If the device was inserted as a new entry on the queue, * return 1 meaning the device queue should be run. If we * were already queued, implying someone else has already * started the queue, return 0 so the caller doesn't attempt * to run the queue. */ static int xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo, u_int32_t new_priority) { int retval; u_int32_t old_priority; CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n")); old_priority = pinfo->priority; /* * Are we already queued? */ if (pinfo->index != CAM_UNQUEUED_INDEX) { /* Simply reorder based on new priority */ if (new_priority < old_priority) { camq_change_priority(queue, pinfo->index, new_priority); CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("changed priority to %d\n", new_priority)); } retval = 0; } else { /* New entry on the queue */ if (new_priority < old_priority) pinfo->priority = new_priority; CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("Inserting onto queue\n")); pinfo->generation = ++queue->generation; camq_insert(queue, pinfo); retval = 1; } return (retval); } static void xpt_run_dev_allocq(struct cam_eb *bus) { struct cam_devq *devq; if ((devq = bus->sim->devq) == NULL) { CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq: NULL devq\n")); return; } CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n")); CAM_DEBUG_PRINT(CAM_DEBUG_XPT, (" qfrozen_cnt == 0x%x, entries == %d, " "openings == %d, active == %d\n", devq->alloc_queue.qfrozen_cnt, devq->alloc_queue.entries, devq->alloc_openings, devq->alloc_active)); devq->alloc_queue.qfrozen_cnt++; while ((devq->alloc_queue.entries > 0) && (devq->alloc_openings > 0) && (devq->alloc_queue.qfrozen_cnt <= 1)) { struct cam_ed_qinfo *qinfo; struct cam_ed *device; union ccb *work_ccb; struct cam_periph *drv; struct camq *drvq; qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue, CAMQ_HEAD); device = qinfo->device; CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("running device %p\n", device)); drvq = &device->drvq; #ifdef CAMDEBUG if (drvq->entries <= 0) { panic("xpt_run_dev_allocq: " "Device on queue without any work to do"); } #endif if ((work_ccb = xpt_get_ccb(device)) != NULL) { devq->alloc_openings--; devq->alloc_active++; drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD); xpt_setup_ccb(&work_ccb->ccb_h, drv->path, drv->pinfo.priority); CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("calling periph start\n")); drv->periph_start(drv, work_ccb); } else { /* * Malloc failure in alloc_ccb */ /* * XXX add us to a list to be run from free_ccb * if we don't have any ccbs active on this * device queue otherwise we may never get run * again. */ break; } if (drvq->entries > 0) { /* We have more work. Attempt to reschedule */ xpt_schedule_dev_allocq(bus, device); } } devq->alloc_queue.qfrozen_cnt--; } static void xpt_run_dev_sendq(struct cam_eb *bus) { struct cam_devq *devq; if ((devq = bus->sim->devq) == NULL) { CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq: NULL devq\n")); return; } CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n")); devq->send_queue.qfrozen_cnt++; while ((devq->send_queue.entries > 0) && (devq->send_openings > 0)) { struct cam_ed_qinfo *qinfo; struct cam_ed *device; union ccb *work_ccb; struct cam_sim *sim; if (devq->send_queue.qfrozen_cnt > 1) { break; } qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue, CAMQ_HEAD); device = qinfo->device; /* * If the device has been "frozen", don't attempt * to run it. */ if (device->qfrozen_cnt > 0) { continue; } CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("running device %p\n", device)); work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); if (work_ccb == NULL) { kprintf("device on run queue with no ccbs???\n"); continue; } if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) { lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); if (xsoftc.num_highpower <= 0) { /* * We got a high power command, but we * don't have any available slots. Freeze * the device queue until we have a slot * available. */ device->qfrozen_cnt++; STAILQ_INSERT_TAIL(&xsoftc.highpowerq, &work_ccb->ccb_h, xpt_links.stqe); lockmgr(&xsoftc.xpt_lock, LK_RELEASE); continue; } else { /* * Consume a high power slot while * this ccb runs. */ xsoftc.num_highpower--; } lockmgr(&xsoftc.xpt_lock, LK_RELEASE); } devq->active_dev = device; cam_ccbq_remove_ccb(&device->ccbq, work_ccb); cam_ccbq_send_ccb(&device->ccbq, work_ccb); devq->send_openings--; devq->send_active++; if (device->ccbq.queue.entries > 0) xpt_schedule_dev_sendq(bus, device); if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){ /* * The client wants to freeze the queue * after this CCB is sent. */ device->qfrozen_cnt++; } /* In Target mode, the peripheral driver knows best... */ if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) { if ((device->inq_flags & SID_CmdQue) != 0 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE) work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID; else /* * Clear this in case of a retried CCB that * failed due to a rejected tag. */ work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID; } /* * Device queues can be shared among multiple sim instances * that reside on different busses. Use the SIM in the queue * CCB's path, rather than the one in the bus that was passed * into this function. */ sim = work_ccb->ccb_h.path->bus->sim; (*(sim->sim_action))(sim, work_ccb); devq->active_dev = NULL; } devq->send_queue.qfrozen_cnt--; } /* * This function merges stuff from the slave ccb into the master ccb, while * keeping important fields in the master ccb constant. */ void xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb) { /* * Pull fields that are valid for peripheral drivers to set * into the master CCB along with the CCB "payload". */ master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count; master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code; master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout; master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags; bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1], sizeof(union ccb) - sizeof(struct ccb_hdr)); } void xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority) { CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n")); callout_init(&ccb_h->timeout_ch); ccb_h->pinfo.priority = priority; ccb_h->path = path; ccb_h->path_id = path->bus->path_id; if (path->target) ccb_h->target_id = path->target->target_id; else ccb_h->target_id = CAM_TARGET_WILDCARD; if (path->device) { ccb_h->target_lun = path->device->lun_id; ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation; } else { ccb_h->target_lun = CAM_TARGET_WILDCARD; } ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; ccb_h->flags = 0; } /* Path manipulation functions */ cam_status xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph, path_id_t path_id, target_id_t target_id, lun_id_t lun_id) { struct cam_path *path; cam_status status; path = kmalloc(sizeof(*path), M_CAMXPT, M_INTWAIT); status = xpt_compile_path(path, perph, path_id, target_id, lun_id); if (status != CAM_REQ_CMP) { kfree(path, M_CAMXPT); path = NULL; } *new_path_ptr = path; return (status); } cam_status xpt_create_path_unlocked(struct cam_path **new_path_ptr, struct cam_periph *periph, path_id_t path_id, target_id_t target_id, lun_id_t lun_id) { struct cam_path *path; struct cam_eb *bus = NULL; cam_status status; int need_unlock = 0; path = (struct cam_path *)kmalloc(sizeof(*path), M_CAMXPT, M_WAITOK); if (path_id != CAM_BUS_WILDCARD) { bus = xpt_find_bus(path_id); if (bus != NULL) { need_unlock = 1; CAM_SIM_LOCK(bus->sim); } } status = xpt_compile_path(path, periph, path_id, target_id, lun_id); if (need_unlock) CAM_SIM_UNLOCK(bus->sim); if (status != CAM_REQ_CMP) { kfree(path, M_CAMXPT); path = NULL; } *new_path_ptr = path; return (status); } static cam_status xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph, path_id_t path_id, target_id_t target_id, lun_id_t lun_id) { struct cam_eb *bus; struct cam_et *target; struct cam_ed *device; cam_status status; status = CAM_REQ_CMP; /* Completed without error */ target = NULL; /* Wildcarded */ device = NULL; /* Wildcarded */ /* * We will potentially modify the EDT, so block interrupts * that may attempt to create cam paths. */ bus = xpt_find_bus(path_id); if (bus == NULL) { status = CAM_PATH_INVALID; } else { target = xpt_find_target(bus, target_id); if (target == NULL) { /* Create one */ struct cam_et *new_target; new_target = xpt_alloc_target(bus, target_id); if (new_target == NULL) { status = CAM_RESRC_UNAVAIL; } else { target = new_target; } } if (target != NULL) { device = xpt_find_device(target, lun_id); if (device == NULL) { /* Create one */ struct cam_ed *new_device; new_device = xpt_alloc_device(bus, target, lun_id); if (new_device == NULL) { status = CAM_RESRC_UNAVAIL; } else { device = new_device; } } } } /* * Only touch the user's data if we are successful. */ if (status == CAM_REQ_CMP) { new_path->periph = perph; new_path->bus = bus; new_path->target = target; new_path->device = device; CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n")); } else { if (device != NULL) xpt_release_device(bus, target, device); if (target != NULL) xpt_release_target(bus, target); if (bus != NULL) xpt_release_bus(bus); } return (status); } static void xpt_release_path(struct cam_path *path) { CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n")); if (path->device != NULL) { xpt_release_device(path->bus, path->target, path->device); path->device = NULL; } if (path->target != NULL) { xpt_release_target(path->bus, path->target); path->target = NULL; } if (path->bus != NULL) { xpt_release_bus(path->bus); path->bus = NULL; } } void xpt_free_path(struct cam_path *path) { CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n")); xpt_release_path(path); kfree(path, M_CAMXPT); } /* * Return -1 for failure, 0 for exact match, 1 for match with wildcards * in path1, 2 for match with wildcards in path2. */ int xpt_path_comp(struct cam_path *path1, struct cam_path *path2) { int retval = 0; if (path1->bus != path2->bus) { if (path1->bus->path_id == CAM_BUS_WILDCARD) retval = 1; else if (path2->bus->path_id == CAM_BUS_WILDCARD) retval = 2; else return (-1); } if (path1->target != path2->target) { if (path1->target->target_id == CAM_TARGET_WILDCARD) { if (retval == 0) retval = 1; } else if (path2->target->target_id == CAM_TARGET_WILDCARD) retval = 2; else return (-1); } if (path1->device != path2->device) { if (path1->device->lun_id == CAM_LUN_WILDCARD) { if (retval == 0) retval = 1; } else if (path2->device->lun_id == CAM_LUN_WILDCARD) retval = 2; else return (-1); } return (retval); } void xpt_print_path(struct cam_path *path) { if (path == NULL) kprintf("(nopath): "); else { if (path->periph != NULL) kprintf("(%s%d:", path->periph->periph_name, path->periph->unit_number); else kprintf("(noperiph:"); if (path->bus != NULL) kprintf("%s%d:%d:", path->bus->sim->sim_name, path->bus->sim->unit_number, path->bus->sim->bus_id); else kprintf("nobus:"); if (path->target != NULL) kprintf("%d:", path->target->target_id); else kprintf("X:"); if (path->device != NULL) kprintf("%d): ", path->device->lun_id); else kprintf("X): "); } } void xpt_print(struct cam_path *path, const char *fmt, ...) { __va_list ap; xpt_print_path(path); __va_start(ap, fmt); kvprintf(fmt, ap); __va_end(ap); } int xpt_path_string(struct cam_path *path, char *str, size_t str_len) { struct sbuf sb; sim_lock_assert_owned(path->bus->sim->lock); sbuf_new(&sb, str, str_len, 0); if (path == NULL) sbuf_printf(&sb, "(nopath): "); else { if (path->periph != NULL) sbuf_printf(&sb, "(%s%d:", path->periph->periph_name, path->periph->unit_number); else sbuf_printf(&sb, "(noperiph:"); if (path->bus != NULL) sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name, path->bus->sim->unit_number, path->bus->sim->bus_id); else sbuf_printf(&sb, "nobus:"); if (path->target != NULL) sbuf_printf(&sb, "%d:", path->target->target_id); else sbuf_printf(&sb, "X:"); if (path->device != NULL) sbuf_printf(&sb, "%d): ", path->device->lun_id); else sbuf_printf(&sb, "X): "); } sbuf_finish(&sb); return(sbuf_len(&sb)); } path_id_t xpt_path_path_id(struct cam_path *path) { sim_lock_assert_owned(path->bus->sim->lock); return(path->bus->path_id); } target_id_t xpt_path_target_id(struct cam_path *path) { sim_lock_assert_owned(path->bus->sim->lock); if (path->target != NULL) return (path->target->target_id); else return (CAM_TARGET_WILDCARD); } lun_id_t xpt_path_lun_id(struct cam_path *path) { sim_lock_assert_owned(path->bus->sim->lock); if (path->device != NULL) return (path->device->lun_id); else return (CAM_LUN_WILDCARD); } struct cam_sim * xpt_path_sim(struct cam_path *path) { return (path->bus->sim); } struct cam_periph* xpt_path_periph(struct cam_path *path) { sim_lock_assert_owned(path->bus->sim->lock); return (path->periph); } char * xpt_path_serialno(struct cam_path *path) { return (path->device->serial_num); } /* * Release a CAM control block for the caller. Remit the cost of the structure * to the device referenced by the path. If the this device had no 'credits' * and peripheral drivers have registered async callbacks for this notification * call them now. */ void xpt_release_ccb(union ccb *free_ccb) { struct cam_path *path; struct cam_ed *device; struct cam_eb *bus; struct cam_sim *sim; CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n")); path = free_ccb->ccb_h.path; device = path->device; bus = path->bus; sim = bus->sim; sim_lock_assert_owned(sim->lock); cam_ccbq_release_opening(&device->ccbq); if (sim->ccb_count > sim->max_ccbs) { xpt_free_ccb(free_ccb); sim->ccb_count--; } else if (sim == &cam_dead_sim) { xpt_free_ccb(free_ccb); } else { SLIST_INSERT_HEAD(&sim->ccb_freeq, &free_ccb->ccb_h, xpt_links.sle); } if (sim->devq == NULL) { return; } sim->devq->alloc_openings++; sim->devq->alloc_active--; /* XXX Turn this into an inline function - xpt_run_device?? */ if ((device_is_alloc_queued(device) == 0) && (device->drvq.entries > 0)) { xpt_schedule_dev_allocq(bus, device); } if (dev_allocq_is_runnable(sim->devq)) xpt_run_dev_allocq(bus); } /* Functions accessed by SIM drivers */ /* * A sim structure, listing the SIM entry points and instance * identification info is passed to xpt_bus_register to hook the SIM * into the CAM framework. xpt_bus_register creates a cam_eb entry * for this new bus and places it in the array of busses and assigns * it a path_id. The path_id may be influenced by "hard wiring" * information specified by the user. Once interrupt services are * availible, the bus will be probed. */ int32_t xpt_bus_register(struct cam_sim *sim, u_int32_t bus) { struct cam_eb *new_bus; struct cam_eb *old_bus; struct ccb_pathinq cpi; sim_lock_assert_owned(sim->lock); sim->bus_id = bus; new_bus = kmalloc(sizeof(*new_bus), M_CAMXPT, M_INTWAIT); if (strcmp(sim->sim_name, "xpt") != 0) { sim->path_id = xptpathid(sim->sim_name, sim->unit_number, sim->bus_id); } TAILQ_INIT(&new_bus->et_entries); new_bus->path_id = sim->path_id; new_bus->sim = sim; ++sim->refcount; timevalclear(&new_bus->last_reset); new_bus->flags = 0; new_bus->refcount = 1; /* Held until a bus_deregister event */ new_bus->generation = 0; lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); old_bus = TAILQ_FIRST(&xsoftc.xpt_busses); while (old_bus != NULL && old_bus->path_id < new_bus->path_id) old_bus = TAILQ_NEXT(old_bus, links); if (old_bus != NULL) TAILQ_INSERT_BEFORE(old_bus, new_bus, links); else TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links); xsoftc.bus_generation++; lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); /* Notify interested parties */ if (sim->path_id != CAM_XPT_PATH_ID) { struct cam_path path; xpt_compile_path(&path, /*periph*/NULL, sim->path_id, CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); cpi.ccb_h.func_code = XPT_PATH_INQ; xpt_action((union ccb *)&cpi); xpt_async(AC_PATH_REGISTERED, &path, &cpi); xpt_release_path(&path); } return (CAM_SUCCESS); } /* * Deregister a bus. We must clean out all transactions pending on the bus. * This routine is typically called prior to cam_sim_free() (e.g. see * dev/usbmisc/umass/umass.c) */ int32_t xpt_bus_deregister(path_id_t pathid) { struct cam_path bus_path; struct cam_et *target; struct cam_ed *device; struct cam_ed_qinfo *qinfo; struct cam_devq *devq; struct cam_periph *periph; struct cam_sim *ccbsim; union ccb *work_ccb; cam_status status; int retries = 0; status = xpt_compile_path(&bus_path, NULL, pathid, CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); if (status != CAM_REQ_CMP) return (status); /* * This should clear out all pending requests and timeouts, but * the ccb's may be queued to a software interrupt. * * XXX AC_LOST_DEVICE does not precisely abort the pending requests, * and it really ought to. */ xpt_async(AC_LOST_DEVICE, &bus_path, NULL); xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); /* * Mark the SIM as having been deregistered. This prevents * certain operations from re-queueing to it, stops new devices * from being added, etc. */ devq = bus_path.bus->sim->devq; ccbsim = bus_path.bus->sim; ccbsim->flags |= CAM_SIM_DEREGISTERED; again: /* * Execute any pending operations now. */ while ((qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue, CAMQ_HEAD)) != NULL || (qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue, CAMQ_HEAD)) != NULL) { do { device = qinfo->device; work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); if (work_ccb != NULL) { devq->active_dev = device; cam_ccbq_remove_ccb(&device->ccbq, work_ccb); cam_ccbq_send_ccb(&device->ccbq, work_ccb); (*(ccbsim->sim_action))(ccbsim, work_ccb); } periph = (struct cam_periph *)camq_remove(&device->drvq, CAMQ_HEAD); if (periph != NULL) xpt_schedule(periph, periph->pinfo.priority); } while (work_ccb != NULL || periph != NULL); } /* * Make sure all completed CCBs are processed. */ while (!TAILQ_EMPTY(&ccbsim->sim_doneq)) { camisr_runqueue(ccbsim); } /* * Check for requeues, reissues asyncs if necessary */ if (CAMQ_GET_HEAD(&devq->send_queue)) kprintf("camq: devq send_queue still in use (%d entries)\n", devq->send_queue.entries); if (CAMQ_GET_HEAD(&devq->alloc_queue)) kprintf("camq: devq alloc_queue still in use (%d entries)\n", devq->alloc_queue.entries); if (CAMQ_GET_HEAD(&devq->send_queue) || CAMQ_GET_HEAD(&devq->alloc_queue)) { if (++retries < 5) { xpt_async(AC_LOST_DEVICE, &bus_path, NULL); xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); goto again; } } /* * Retarget the bus and all cached sim pointers to dead_sim. * * Various CAM subsystems may be holding on to targets, devices, * and/or peripherals and may attempt to use the sim pointer cached * in some of these structures during close. */ bus_path.bus->sim = &cam_dead_sim; TAILQ_FOREACH(target, &bus_path.bus->et_entries, links) { TAILQ_FOREACH(device, &target->ed_entries, links) { device->sim = &cam_dead_sim; SLIST_FOREACH(periph, &device->periphs, periph_links) { periph->sim = &cam_dead_sim; } } } /* * Repeat the async's for the benefit of any new devices, such as * might be created from completed probes. Any new device * ops will run on dead_sim. * * XXX There are probably races :-( */ CAM_SIM_LOCK(&cam_dead_sim); xpt_async(AC_LOST_DEVICE, &bus_path, NULL); xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); CAM_SIM_UNLOCK(&cam_dead_sim); /* Release the reference count held while registered. */ xpt_release_bus(bus_path.bus); xpt_release_path(&bus_path); /* Release the ref we got when the bus was registered */ cam_sim_release(ccbsim, 0); return (CAM_REQ_CMP); } static path_id_t xptnextfreepathid(void) { struct cam_eb *bus; path_id_t pathid; char *strval; pathid = 0; lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); bus = TAILQ_FIRST(&xsoftc.xpt_busses); retry: /* Find an unoccupied pathid */ while (bus != NULL && bus->path_id <= pathid) { if (bus->path_id == pathid) pathid++; bus = TAILQ_NEXT(bus, links); } lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); /* * Ensure that this pathid is not reserved for * a bus that may be registered in the future. */ if (resource_string_value("scbus", pathid, "at", &strval) == 0) { ++pathid; /* Start the search over */ lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); goto retry; } return (pathid); } static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus) { path_id_t pathid; int i, dunit, val; char buf[32]; pathid = CAM_XPT_PATH_ID; ksnprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit); i = -1; while ((i = resource_query_string(i, "at", buf)) != -1) { if (strcmp(resource_query_name(i), "scbus")) { /* Avoid a bit of foot shooting. */ continue; } dunit = resource_query_unit(i); if (dunit < 0) /* unwired?! */ continue; if (resource_int_value("scbus", dunit, "bus", &val) == 0) { if (sim_bus == val) { pathid = dunit; break; } } else if (sim_bus == 0) { /* Unspecified matches bus 0 */ pathid = dunit; break; } else { kprintf("Ambiguous scbus configuration for %s%d " "bus %d, cannot wire down. The kernel " "config entry for scbus%d should " "specify a controller bus.\n" "Scbus will be assigned dynamically.\n", sim_name, sim_unit, sim_bus, dunit); break; } } if (pathid == CAM_XPT_PATH_ID) pathid = xptnextfreepathid(); return (pathid); } void xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg) { struct cam_eb *bus; struct cam_et *target, *next_target; struct cam_ed *device, *next_device; sim_lock_assert_owned(path->bus->sim->lock); CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_async\n")); /* * Most async events come from a CAM interrupt context. In * a few cases, the error recovery code at the peripheral layer, * which may run from our SWI or a process context, may signal * deferred events with a call to xpt_async. */ bus = path->bus; if (async_code == AC_BUS_RESET) { /* Update our notion of when the last reset occurred */ microuptime(&bus->last_reset); } for (target = TAILQ_FIRST(&bus->et_entries); target != NULL; target = next_target) { next_target = TAILQ_NEXT(target, links); if (path->target != target && path->target->target_id != CAM_TARGET_WILDCARD && target->target_id != CAM_TARGET_WILDCARD) continue; if (async_code == AC_SENT_BDR) { /* Update our notion of when the last reset occurred */ microuptime(&path->target->last_reset); } for (device = TAILQ_FIRST(&target->ed_entries); device != NULL; device = next_device) { next_device = TAILQ_NEXT(device, links); if (path->device != device && path->device->lun_id != CAM_LUN_WILDCARD && device->lun_id != CAM_LUN_WILDCARD) continue; xpt_dev_async(async_code, bus, target, device, async_arg); xpt_async_bcast(&device->asyncs, async_code, path, async_arg); } } /* * If this wasn't a fully wildcarded async, tell all * clients that want all async events. */ if (bus != xpt_periph->path->bus) xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code, path, async_arg); } static void xpt_async_bcast(struct async_list *async_head, u_int32_t async_code, struct cam_path *path, void *async_arg) { struct async_node *cur_entry; cur_entry = SLIST_FIRST(async_head); while (cur_entry != NULL) { struct async_node *next_entry; /* * Grab the next list entry before we call the current * entry's callback. This is because the callback function * can delete its async callback entry. */ next_entry = SLIST_NEXT(cur_entry, links); if ((cur_entry->event_enable & async_code) != 0) cur_entry->callback(cur_entry->callback_arg, async_code, path, async_arg); cur_entry = next_entry; } } /* * Handle any per-device event notifications that require action by the XPT. */ static void xpt_dev_async(u_int32_t async_code, struct cam_eb *bus, struct cam_et *target, struct cam_ed *device, void *async_arg) { cam_status status; struct cam_path newpath; /* * We only need to handle events for real devices. */ if (target->target_id == CAM_TARGET_WILDCARD || device->lun_id == CAM_LUN_WILDCARD) return; /* * We need our own path with wildcards expanded to * handle certain types of events. */ if ((async_code == AC_SENT_BDR) || (async_code == AC_BUS_RESET) || (async_code == AC_INQ_CHANGED)) status = xpt_compile_path(&newpath, NULL, bus->path_id, target->target_id, device->lun_id); else status = CAM_REQ_CMP_ERR; if (status == CAM_REQ_CMP) { /* * Allow transfer negotiation to occur in a * tag free environment. */ if (async_code == AC_SENT_BDR || async_code == AC_BUS_RESET) xpt_toggle_tags(&newpath); if (async_code == AC_INQ_CHANGED) { /* * We've sent a start unit command, or * something similar to a device that * may have caused its inquiry data to * change. So we re-scan the device to * refresh the inquiry data for it. */ xpt_scan_lun(newpath.periph, &newpath, CAM_EXPECT_INQ_CHANGE, NULL); } xpt_release_path(&newpath); } else if (async_code == AC_LOST_DEVICE) { /* * When we lose a device the device may be about to detach * the sim, we have to clear out all pending timeouts and * requests before that happens. * * This typically happens most often with USB/UMASS devices. * * XXX it would be nice if we could abort the requests * pertaining to the device. */ xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE); if ((device->flags & CAM_DEV_UNCONFIGURED) == 0) { device->flags |= CAM_DEV_UNCONFIGURED; xpt_release_device(bus, target, device); } } else if (async_code == AC_TRANSFER_NEG) { struct ccb_trans_settings *settings; settings = (struct ccb_trans_settings *)async_arg; xpt_set_transfer_settings(settings, device, /*async_update*/TRUE); } } u_int32_t xpt_freeze_devq(struct cam_path *path, u_int count) { struct ccb_hdr *ccbh; sim_lock_assert_owned(path->bus->sim->lock); path->device->qfrozen_cnt += count; /* * Mark the last CCB in the queue as needing * to be requeued if the driver hasn't * changed it's state yet. This fixes a race * where a ccb is just about to be queued to * a controller driver when it's interrupt routine * freezes the queue. To completly close the * hole, controller drives must check to see * if a ccb's status is still CAM_REQ_INPROG * just before they queue * the CCB. See ahc_action/ahc_freeze_devq for * an example. */ ccbh = TAILQ_LAST(&path->device->ccbq.active_ccbs, ccb_hdr_tailq); if (ccbh && ccbh->status == CAM_REQ_INPROG) ccbh->status = CAM_REQUEUE_REQ; return (path->device->qfrozen_cnt); } u_int32_t xpt_freeze_simq(struct cam_sim *sim, u_int count) { sim_lock_assert_owned(sim->lock); if (sim->devq == NULL) return(count); sim->devq->send_queue.qfrozen_cnt += count; if (sim->devq->active_dev != NULL) { struct ccb_hdr *ccbh; ccbh = TAILQ_LAST(&sim->devq->active_dev->ccbq.active_ccbs, ccb_hdr_tailq); if (ccbh && ccbh->status == CAM_REQ_INPROG) ccbh->status = CAM_REQUEUE_REQ; } return (sim->devq->send_queue.qfrozen_cnt); } /* * Release the device queue after a timeout has expired, typically used to * introduce a delay before retrying after an I/O error or other problem. */ static void xpt_release_devq_timeout(void *arg) { struct cam_ed *device; device = (struct cam_ed *)arg; CAM_SIM_LOCK(device->sim); xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE); CAM_SIM_UNLOCK(device->sim); } void xpt_release_devq(struct cam_path *path, u_int count, int run_queue) { sim_lock_assert_owned(path->bus->sim->lock); xpt_release_devq_device(path->device, count, run_queue); } static void xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue) { int rundevq; rundevq = 0; if (dev->qfrozen_cnt > 0) { count = (count > dev->qfrozen_cnt) ? dev->qfrozen_cnt : count; dev->qfrozen_cnt -= count; if (dev->qfrozen_cnt == 0) { /* * No longer need to wait for a successful * command completion. */ dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; /* * Remove any timeouts that might be scheduled * to release this queue. */ if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { callout_stop(&dev->callout); dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; } /* * Now that we are unfrozen schedule the * device so any pending transactions are * run. */ if ((dev->ccbq.queue.entries > 0) && (xpt_schedule_dev_sendq(dev->target->bus, dev)) && (run_queue != 0)) { rundevq = 1; } } } if (rundevq != 0) xpt_run_dev_sendq(dev->target->bus); } void xpt_release_simq(struct cam_sim *sim, int run_queue) { struct camq *sendq; sim_lock_assert_owned(sim->lock); if (sim->devq == NULL) return; sendq = &(sim->devq->send_queue); if (sendq->qfrozen_cnt > 0) { sendq->qfrozen_cnt--; if (sendq->qfrozen_cnt == 0) { struct cam_eb *bus; /* * If there is a timeout scheduled to release this * sim queue, remove it. The queue frozen count is * already at 0. */ if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){ callout_stop(&sim->callout); sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING; } bus = xpt_find_bus(sim->path_id); if (run_queue) { /* * Now that we are unfrozen run the send queue. */ xpt_run_dev_sendq(bus); } xpt_release_bus(bus); } } } void xpt_done(union ccb *done_ccb) { struct cam_sim *sim; CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n")); if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) { /* * Queue up the request for handling by our SWI handler * any of the "non-immediate" type of ccbs. */ sim = done_ccb->ccb_h.path->bus->sim; switch (done_ccb->ccb_h.path->periph->type) { case CAM_PERIPH_BIO: spin_lock(&sim->sim_spin); TAILQ_INSERT_TAIL(&sim->sim_doneq, &done_ccb->ccb_h, sim_links.tqe); done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; spin_unlock(&sim->sim_spin); if ((sim->flags & CAM_SIM_ON_DONEQ) == 0) { spin_lock(&cam_simq_spin); if ((sim->flags & CAM_SIM_ON_DONEQ) == 0) { TAILQ_INSERT_TAIL(&cam_simq, sim, links); sim->flags |= CAM_SIM_ON_DONEQ; } spin_unlock(&cam_simq_spin); } if ((done_ccb->ccb_h.flags & CAM_POLLED) == 0) setsoftcambio(); break; default: panic("unknown periph type %d", done_ccb->ccb_h.path->periph->type); } } } union ccb * xpt_alloc_ccb(void) { union ccb *new_ccb; new_ccb = kmalloc(sizeof(*new_ccb), M_CAMXPT, M_INTWAIT | M_ZERO); return (new_ccb); } void xpt_free_ccb(union ccb *free_ccb) { kfree(free_ccb, M_CAMXPT); } /* Private XPT functions */ /* * Get a CAM control block for the caller. Charge the structure to the device * referenced by the path. If the this device has no 'credits' then the * device already has the maximum number of outstanding operations under way * and we return NULL. If we don't have sufficient resources to allocate more * ccbs, we also return NULL. */ static union ccb * xpt_get_ccb(struct cam_ed *device) { union ccb *new_ccb; struct cam_sim *sim; sim = device->sim; if ((new_ccb = (union ccb *)SLIST_FIRST(&sim->ccb_freeq)) == NULL) { new_ccb = xpt_alloc_ccb(); if ((sim->flags & CAM_SIM_MPSAFE) == 0) callout_init(&new_ccb->ccb_h.timeout_ch); SLIST_INSERT_HEAD(&sim->ccb_freeq, &new_ccb->ccb_h, xpt_links.sle); sim->ccb_count++; } cam_ccbq_take_opening(&device->ccbq); SLIST_REMOVE_HEAD(&sim->ccb_freeq, xpt_links.sle); return (new_ccb); } static void xpt_release_bus(struct cam_eb *bus) { if ((--bus->refcount == 0) && (TAILQ_FIRST(&bus->et_entries) == NULL)) { lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links); xsoftc.bus_generation++; lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); kfree(bus, M_CAMXPT); } } static struct cam_et * xpt_alloc_target(struct cam_eb *bus, target_id_t target_id) { struct cam_et *target; struct cam_et *cur_target; target = kmalloc(sizeof(*target), M_CAMXPT, M_INTWAIT); TAILQ_INIT(&target->ed_entries); target->bus = bus; target->target_id = target_id; target->refcount = 1; target->generation = 0; timevalclear(&target->last_reset); /* * Hold a reference to our parent bus so it * will not go away before we do. */ bus->refcount++; /* Insertion sort into our bus's target list */ cur_target = TAILQ_FIRST(&bus->et_entries); while (cur_target != NULL && cur_target->target_id < target_id) cur_target = TAILQ_NEXT(cur_target, links); if (cur_target != NULL) { TAILQ_INSERT_BEFORE(cur_target, target, links); } else { TAILQ_INSERT_TAIL(&bus->et_entries, target, links); } bus->generation++; return (target); } static void xpt_release_target(struct cam_eb *bus, struct cam_et *target) { if (target->refcount == 1) { KKASSERT(TAILQ_FIRST(&target->ed_entries) == NULL); TAILQ_REMOVE(&bus->et_entries, target, links); bus->generation++; xpt_release_bus(bus); KKASSERT(target->refcount == 1); kfree(target, M_CAMXPT); } else { --target->refcount; } } static struct cam_ed * xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id) { struct cam_path path; struct cam_ed *device; struct cam_devq *devq; cam_status status; /* * Disallow new devices while trying to deregister a sim */ if (bus->sim->flags & CAM_SIM_DEREGISTERED) return (NULL); /* * Make space for us in the device queue on our bus */ devq = bus->sim->devq; if (devq == NULL) return(NULL); status = cam_devq_resize(devq, devq->alloc_queue.array_size + 1); if (status != CAM_REQ_CMP) { device = NULL; } else { device = kmalloc(sizeof(*device), M_CAMXPT, M_INTWAIT); } if (device != NULL) { struct cam_ed *cur_device; cam_init_pinfo(&device->alloc_ccb_entry.pinfo); device->alloc_ccb_entry.device = device; cam_init_pinfo(&device->send_ccb_entry.pinfo); device->send_ccb_entry.device = device; device->target = target; device->lun_id = lun_id; device->sim = bus->sim; /* Initialize our queues */ if (camq_init(&device->drvq, 0) != 0) { kfree(device, M_CAMXPT); return (NULL); } if (cam_ccbq_init(&device->ccbq, bus->sim->max_dev_openings) != 0) { camq_fini(&device->drvq); kfree(device, M_CAMXPT); return (NULL); } SLIST_INIT(&device->asyncs); SLIST_INIT(&device->periphs); device->generation = 0; device->owner = NULL; /* * Take the default quirk entry until we have inquiry * data and can determine a better quirk to use. */ device->quirk = &xpt_quirk_table[xpt_quirk_table_size - 1]; bzero(&device->inq_data, sizeof(device->inq_data)); device->inq_flags = 0; device->queue_flags = 0; device->serial_num = NULL; device->serial_num_len = 0; device->qfrozen_cnt = 0; device->flags = CAM_DEV_UNCONFIGURED; device->tag_delay_count = 0; device->tag_saved_openings = 0; device->refcount = 1; callout_init(&device->callout); /* * Hold a reference to our parent target so it * will not go away before we do. */ target->refcount++; /* * XXX should be limited by number of CCBs this bus can * do. */ bus->sim->max_ccbs += device->ccbq.devq_openings; /* Insertion sort into our target's device list */ cur_device = TAILQ_FIRST(&target->ed_entries); while (cur_device != NULL && cur_device->lun_id < lun_id) cur_device = TAILQ_NEXT(cur_device, links); if (cur_device != NULL) { TAILQ_INSERT_BEFORE(cur_device, device, links); } else { TAILQ_INSERT_TAIL(&target->ed_entries, device, links); } target->generation++; if (lun_id != CAM_LUN_WILDCARD) { xpt_compile_path(&path, NULL, bus->path_id, target->target_id, lun_id); xpt_devise_transport(&path); xpt_release_path(&path); } } return (device); } static void xpt_reference_device(struct cam_ed *device) { ++device->refcount; } static void xpt_release_device(struct cam_eb *bus, struct cam_et *target, struct cam_ed *device) { struct cam_devq *devq; if (device->refcount == 1) { KKASSERT(device->flags & CAM_DEV_UNCONFIGURED); if (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX || device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX) panic("Removing device while still queued for ccbs"); if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { device->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; callout_stop(&device->callout); } TAILQ_REMOVE(&target->ed_entries, device,links); target->generation++; bus->sim->max_ccbs -= device->ccbq.devq_openings; if ((devq = bus->sim->devq) != NULL) { /* Release our slot in the devq */ cam_devq_resize(devq, devq->alloc_queue.array_size - 1); } camq_fini(&device->drvq); camq_fini(&device->ccbq.queue); xpt_release_target(bus, target); KKASSERT(device->refcount == 1); kfree(device, M_CAMXPT); } else { --device->refcount; } } static u_int32_t xpt_dev_ccbq_resize(struct cam_path *path, int newopenings) { int diff; int result; struct cam_ed *dev; dev = path->device; diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings); result = cam_ccbq_resize(&dev->ccbq, newopenings); if (result == CAM_REQ_CMP && (diff < 0)) { dev->flags |= CAM_DEV_RESIZE_QUEUE_NEEDED; } if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 || (dev->inq_flags & SID_CmdQue) != 0) dev->tag_saved_openings = newopenings; /* Adjust the global limit */ dev->sim->max_ccbs += diff; return (result); } static struct cam_eb * xpt_find_bus(path_id_t path_id) { struct cam_eb *bus; lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); TAILQ_FOREACH(bus, &xsoftc.xpt_busses, links) { if (bus->path_id == path_id) { bus->refcount++; break; } } lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); return (bus); } static struct cam_et * xpt_find_target(struct cam_eb *bus, target_id_t target_id) { struct cam_et *target; TAILQ_FOREACH(target, &bus->et_entries, links) { if (target->target_id == target_id) { target->refcount++; break; } } return (target); } static struct cam_ed * xpt_find_device(struct cam_et *target, lun_id_t lun_id) { struct cam_ed *device; TAILQ_FOREACH(device, &target->ed_entries, links) { if (device->lun_id == lun_id) { device->refcount++; break; } } return (device); } typedef struct { union ccb *request_ccb; struct ccb_pathinq *cpi; int counter; } xpt_scan_bus_info; /* * To start a scan, request_ccb is an XPT_SCAN_BUS ccb. * As the scan progresses, xpt_scan_bus is used as the * callback on completion function. */ static void xpt_scan_bus(struct cam_periph *periph, union ccb *request_ccb) { CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_scan_bus\n")); switch (request_ccb->ccb_h.func_code) { case XPT_SCAN_BUS: { xpt_scan_bus_info *scan_info; union ccb *work_ccb; struct cam_path *path; u_int i; u_int max_target; u_int initiator_id; /* Find out the characteristics of the bus */ work_ccb = xpt_alloc_ccb(); xpt_setup_ccb(&work_ccb->ccb_h, request_ccb->ccb_h.path, request_ccb->ccb_h.pinfo.priority); work_ccb->ccb_h.func_code = XPT_PATH_INQ; xpt_action(work_ccb); if (work_ccb->ccb_h.status != CAM_REQ_CMP) { request_ccb->ccb_h.status = work_ccb->ccb_h.status; xpt_free_ccb(work_ccb); xpt_done(request_ccb); return; } if ((work_ccb->cpi.hba_misc & PIM_NOINITIATOR) != 0) { /* * Can't scan the bus on an adapter that * cannot perform the initiator role. */ request_ccb->ccb_h.status = CAM_REQ_CMP; xpt_free_ccb(work_ccb); xpt_done(request_ccb); return; } /* Save some state for use while we probe for devices */ scan_info = (xpt_scan_bus_info *) kmalloc(sizeof(xpt_scan_bus_info), M_CAMXPT, M_INTWAIT); scan_info->request_ccb = request_ccb; scan_info->cpi = &work_ccb->cpi; /* Cache on our stack so we can work asynchronously */ max_target = scan_info->cpi->max_target; initiator_id = scan_info->cpi->initiator_id; /* * We can scan all targets in parallel, or do it sequentially. */ if (scan_info->cpi->hba_misc & PIM_SEQSCAN) { max_target = 0; scan_info->counter = 0; } else { scan_info->counter = scan_info->cpi->max_target + 1; if (scan_info->cpi->initiator_id < scan_info->counter) { scan_info->counter--; } } for (i = 0; i <= max_target; i++) { cam_status status; if (i == initiator_id) continue; status = xpt_create_path(&path, xpt_periph, request_ccb->ccb_h.path_id, i, 0); if (status != CAM_REQ_CMP) { kprintf("xpt_scan_bus: xpt_create_path failed" " with status %#x, bus scan halted\n", status); kfree(scan_info, M_CAMXPT); request_ccb->ccb_h.status = status; xpt_free_ccb(work_ccb); xpt_done(request_ccb); break; } work_ccb = xpt_alloc_ccb(); xpt_setup_ccb(&work_ccb->ccb_h, path, request_ccb->ccb_h.pinfo.priority); work_ccb->ccb_h.func_code = XPT_SCAN_LUN; work_ccb->ccb_h.cbfcnp = xpt_scan_bus; work_ccb->ccb_h.ppriv_ptr0 = scan_info; work_ccb->crcn.flags = request_ccb->crcn.flags; xpt_action(work_ccb); } break; } case XPT_SCAN_LUN: { cam_status status; struct cam_path *path; xpt_scan_bus_info *scan_info; path_id_t path_id; target_id_t target_id; lun_id_t lun_id; /* Reuse the same CCB to query if a device was really found */ scan_info = (xpt_scan_bus_info *)request_ccb->ccb_h.ppriv_ptr0; xpt_setup_ccb(&request_ccb->ccb_h, request_ccb->ccb_h.path, request_ccb->ccb_h.pinfo.priority); request_ccb->ccb_h.func_code = XPT_GDEV_TYPE; path_id = request_ccb->ccb_h.path_id; target_id = request_ccb->ccb_h.target_id; lun_id = request_ccb->ccb_h.target_lun; xpt_action(request_ccb); if (request_ccb->ccb_h.status != CAM_REQ_CMP) { struct cam_ed *device; struct cam_et *target; int phl; /* * If we already probed lun 0 successfully, or * we have additional configured luns on this * target that might have "gone away", go onto * the next lun. */ target = request_ccb->ccb_h.path->target; /* * We may touch devices that we don't * hold references too, so ensure they * don't disappear out from under us. * The target above is referenced by the * path in the request ccb. */ phl = 0; device = TAILQ_FIRST(&target->ed_entries); if (device != NULL) { phl = CAN_SRCH_HI_SPARSE(device); if (device->lun_id == 0) device = TAILQ_NEXT(device, links); } if ((lun_id != 0) || (device != NULL)) { if (lun_id < (CAM_SCSI2_MAXLUN-1) || phl) lun_id++; } } else { struct cam_ed *device; device = request_ccb->ccb_h.path->device; if ((device->quirk->quirks & CAM_QUIRK_NOLUNS) == 0) { /* Try the next lun */ if (lun_id < (CAM_SCSI2_MAXLUN-1) || CAN_SRCH_HI_DENSE(device)) lun_id++; } } /* * Free the current request path- we're done with it. */ xpt_free_path(request_ccb->ccb_h.path); /* * Check to see if we scan any further luns. */ if (lun_id == request_ccb->ccb_h.target_lun || lun_id > scan_info->cpi->max_lun) { int done; hop_again: done = 0; if (scan_info->cpi->hba_misc & PIM_SEQSCAN) { scan_info->counter++; if (scan_info->counter == scan_info->cpi->initiator_id) { scan_info->counter++; } if (scan_info->counter >= scan_info->cpi->max_target+1) { done = 1; } } else { scan_info->counter--; if (scan_info->counter == 0) { done = 1; } } if (done) { xpt_free_ccb(request_ccb); xpt_free_ccb((union ccb *)scan_info->cpi); request_ccb = scan_info->request_ccb; kfree(scan_info, M_CAMXPT); request_ccb->ccb_h.status = CAM_REQ_CMP; xpt_done(request_ccb); break; } if ((scan_info->cpi->hba_misc & PIM_SEQSCAN) == 0) { break; } status = xpt_create_path(&path, xpt_periph, scan_info->request_ccb->ccb_h.path_id, scan_info->counter, 0); if (status != CAM_REQ_CMP) { kprintf("xpt_scan_bus: xpt_create_path failed" " with status %#x, bus scan halted\n", status); xpt_free_ccb(request_ccb); xpt_free_ccb((union ccb *)scan_info->cpi); request_ccb = scan_info->request_ccb; kfree(scan_info, M_CAMXPT); request_ccb->ccb_h.status = status; xpt_done(request_ccb); break; } xpt_setup_ccb(&request_ccb->ccb_h, path, request_ccb->ccb_h.pinfo.priority); request_ccb->ccb_h.func_code = XPT_SCAN_LUN; request_ccb->ccb_h.cbfcnp = xpt_scan_bus; request_ccb->ccb_h.ppriv_ptr0 = scan_info; request_ccb->crcn.flags = scan_info->request_ccb->crcn.flags; } else { status = xpt_create_path(&path, xpt_periph, path_id, target_id, lun_id); if (status != CAM_REQ_CMP) { kprintf("xpt_scan_bus: xpt_create_path failed " "with status %#x, halting LUN scan\n", status); goto hop_again; } xpt_setup_ccb(&request_ccb->ccb_h, path, request_ccb->ccb_h.pinfo.priority); request_ccb->ccb_h.func_code = XPT_SCAN_LUN; request_ccb->ccb_h.cbfcnp = xpt_scan_bus; request_ccb->ccb_h.ppriv_ptr0 = scan_info; request_ccb->crcn.flags = scan_info->request_ccb->crcn.flags; } xpt_action(request_ccb); break; } default: break; } } typedef enum { PROBE_TUR, PROBE_INQUIRY, /* this counts as DV0 for Basic Domain Validation */ PROBE_FULL_INQUIRY, PROBE_MODE_SENSE, PROBE_SERIAL_NUM_0, PROBE_SERIAL_NUM_1, PROBE_TUR_FOR_NEGOTIATION, PROBE_INQUIRY_BASIC_DV1, PROBE_INQUIRY_BASIC_DV2, PROBE_DV_EXIT } probe_action; typedef enum { PROBE_INQUIRY_CKSUM = 0x01, PROBE_SERIAL_CKSUM = 0x02, PROBE_NO_ANNOUNCE = 0x04 } probe_flags; typedef struct { TAILQ_HEAD(, ccb_hdr) request_ccbs; probe_action action; union ccb saved_ccb; probe_flags flags; MD5_CTX context; u_int8_t digest[16]; }probe_softc; static void xpt_scan_lun(struct cam_periph *periph, struct cam_path *path, cam_flags flags, union ccb *request_ccb) { struct ccb_pathinq cpi; cam_status status; struct cam_path *new_path; struct cam_periph *old_periph; CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_scan_lun\n")); xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); cpi.ccb_h.func_code = XPT_PATH_INQ; xpt_action((union ccb *)&cpi); if (cpi.ccb_h.status != CAM_REQ_CMP) { if (request_ccb != NULL) { request_ccb->ccb_h.status = cpi.ccb_h.status; xpt_done(request_ccb); } return; } if ((cpi.hba_misc & PIM_NOINITIATOR) != 0) { /* * Can't scan the bus on an adapter that * cannot perform the initiator role. */ if (request_ccb != NULL) { request_ccb->ccb_h.status = CAM_REQ_CMP; xpt_done(request_ccb); } return; } if (request_ccb == NULL) { request_ccb = kmalloc(sizeof(union ccb), M_CAMXPT, M_INTWAIT); new_path = kmalloc(sizeof(*new_path), M_CAMXPT, M_INTWAIT); status = xpt_compile_path(new_path, xpt_periph, path->bus->path_id, path->target->target_id, path->device->lun_id); if (status != CAM_REQ_CMP) { xpt_print(path, "xpt_scan_lun: can't compile path, " "can't continue\n"); kfree(request_ccb, M_CAMXPT); kfree(new_path, M_CAMXPT); return; } xpt_setup_ccb(&request_ccb->ccb_h, new_path, /*priority*/ 1); request_ccb->ccb_h.cbfcnp = xptscandone; request_ccb->ccb_h.func_code = XPT_SCAN_LUN; request_ccb->crcn.flags = flags; } if ((old_periph = cam_periph_find(path, "probe")) != NULL) { probe_softc *softc; softc = (probe_softc *)old_periph->softc; TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, periph_links.tqe); } else { status = cam_periph_alloc(proberegister, NULL, probecleanup, probestart, "probe", CAM_PERIPH_BIO, request_ccb->ccb_h.path, NULL, 0, request_ccb); if (status != CAM_REQ_CMP) { xpt_print(path, "xpt_scan_lun: cam_alloc_periph " "returned an error, can't continue probe\n"); request_ccb->ccb_h.status = status; xpt_done(request_ccb); } } } static void xptscandone(struct cam_periph *periph, union ccb *done_ccb) { xpt_release_path(done_ccb->ccb_h.path); kfree(done_ccb->ccb_h.path, M_CAMXPT); kfree(done_ccb, M_CAMXPT); } static cam_status proberegister(struct cam_periph *periph, void *arg) { union ccb *request_ccb; /* CCB representing the probe request */ cam_status status; probe_softc *softc; request_ccb = (union ccb *)arg; if (periph == NULL) { kprintf("proberegister: periph was NULL!!\n"); return(CAM_REQ_CMP_ERR); } if (request_ccb == NULL) { kprintf("proberegister: no probe CCB, " "can't register device\n"); return(CAM_REQ_CMP_ERR); } softc = kmalloc(sizeof(*softc), M_CAMXPT, M_INTWAIT | M_ZERO); TAILQ_INIT(&softc->request_ccbs); TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, periph_links.tqe); softc->flags = 0; periph->softc = softc; status = cam_periph_acquire(periph); if (status != CAM_REQ_CMP) { return (status); } /* * Ensure we've waited at least a bus settle * delay before attempting to probe the device. * For HBAs that don't do bus resets, this won't make a difference. */ cam_periph_freeze_after_event(periph, &periph->path->bus->last_reset, scsi_delay); probeschedule(periph); return(CAM_REQ_CMP); } static void probeschedule(struct cam_periph *periph) { struct ccb_pathinq cpi; union ccb *ccb; probe_softc *softc; softc = (probe_softc *)periph->softc; ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1); cpi.ccb_h.func_code = XPT_PATH_INQ; xpt_action((union ccb *)&cpi); /* * If a device has gone away and another device, or the same one, * is back in the same place, it should have a unit attention * condition pending. It will not report the unit attention in * response to an inquiry, which may leave invalid transfer * negotiations in effect. The TUR will reveal the unit attention * condition. Only send the TUR for lun 0, since some devices * will get confused by commands other than inquiry to non-existent * luns. If you think a device has gone away start your scan from * lun 0. This will insure that any bogus transfer settings are * invalidated. * * If we haven't seen the device before and the controller supports * some kind of transfer negotiation, negotiate with the first * sent command if no bus reset was performed at startup. This * ensures that the device is not confused by transfer negotiation * settings left over by loader or BIOS action. */ if (((ccb->ccb_h.path->device->flags & CAM_DEV_UNCONFIGURED) == 0) && (ccb->ccb_h.target_lun == 0)) { softc->action = PROBE_TUR; } else if ((cpi.hba_inquiry & (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE)) != 0 && (cpi.hba_misc & PIM_NOBUSRESET) != 0) { proberequestdefaultnegotiation(periph); softc->action = PROBE_INQUIRY; } else { softc->action = PROBE_INQUIRY; } if (ccb->crcn.flags & CAM_EXPECT_INQ_CHANGE) softc->flags |= PROBE_NO_ANNOUNCE; else softc->flags &= ~PROBE_NO_ANNOUNCE; xpt_schedule(periph, ccb->ccb_h.pinfo.priority); } static void probestart(struct cam_periph *periph, union ccb *start_ccb) { /* Probe the device that our peripheral driver points to */ struct ccb_scsiio *csio; probe_softc *softc; CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probestart\n")); softc = (probe_softc *)periph->softc; csio = &start_ccb->csio; switch (softc->action) { case PROBE_TUR: case PROBE_TUR_FOR_NEGOTIATION: case PROBE_DV_EXIT: { scsi_test_unit_ready(csio, /*retries*/4, probedone, MSG_SIMPLE_Q_TAG, SSD_FULL_SIZE, /*timeout*/60000); break; } case PROBE_INQUIRY: case PROBE_FULL_INQUIRY: case PROBE_INQUIRY_BASIC_DV1: case PROBE_INQUIRY_BASIC_DV2: { u_int inquiry_len; struct scsi_inquiry_data *inq_buf; inq_buf = &periph->path->device->inq_data; /* * If the device is currently configured, we calculate an * MD5 checksum of the inquiry data, and if the serial number * length is greater than 0, add the serial number data * into the checksum as well. Once the inquiry and the * serial number check finish, we attempt to figure out * whether we still have the same device. */ if ((periph->path->device->flags & CAM_DEV_UNCONFIGURED) == 0) { MD5Init(&softc->context); MD5Update(&softc->context, (unsigned char *)inq_buf, sizeof(struct scsi_inquiry_data)); softc->flags |= PROBE_INQUIRY_CKSUM; if (periph->path->device->serial_num_len > 0) { MD5Update(&softc->context, periph->path->device->serial_num, periph->path->device->serial_num_len); softc->flags |= PROBE_SERIAL_CKSUM; } MD5Final(softc->digest, &softc->context); } if (softc->action == PROBE_INQUIRY) inquiry_len = SHORT_INQUIRY_LENGTH; else inquiry_len = SID_ADDITIONAL_LENGTH(inq_buf); /* * Some parallel SCSI devices fail to send an * ignore wide residue message when dealing with * odd length inquiry requests. Round up to be * safe. */ inquiry_len = roundup2(inquiry_len, 2); if (softc->action == PROBE_INQUIRY_BASIC_DV1 || softc->action == PROBE_INQUIRY_BASIC_DV2) { inq_buf = kmalloc(inquiry_len, M_CAMXPT, M_INTWAIT); } scsi_inquiry(csio, /*retries*/4, probedone, MSG_SIMPLE_Q_TAG, (u_int8_t *)inq_buf, inquiry_len, /*evpd*/FALSE, /*page_code*/0, SSD_MIN_SIZE, /*timeout*/60 * 1000); break; } case PROBE_MODE_SENSE: { void *mode_buf; int mode_buf_len; mode_buf_len = sizeof(struct scsi_mode_header_6) + sizeof(struct scsi_mode_blk_desc) + sizeof(struct scsi_control_page); mode_buf = kmalloc(mode_buf_len, M_CAMXPT, M_INTWAIT); scsi_mode_sense(csio, /*retries*/4, probedone, MSG_SIMPLE_Q_TAG, /*dbd*/FALSE, SMS_PAGE_CTRL_CURRENT, SMS_CONTROL_MODE_PAGE, mode_buf, mode_buf_len, SSD_FULL_SIZE, /*timeout*/60000); break; } case PROBE_SERIAL_NUM_0: { struct scsi_vpd_supported_page_list *vpd_list = NULL; struct cam_ed *device; device = periph->path->device; if ((device->quirk->quirks & CAM_QUIRK_NOSERIAL) == 0) { vpd_list = kmalloc(sizeof(*vpd_list), M_CAMXPT, M_INTWAIT | M_ZERO); } if (vpd_list != NULL) { scsi_inquiry(csio, /*retries*/4, probedone, MSG_SIMPLE_Q_TAG, (u_int8_t *)vpd_list, sizeof(*vpd_list), /*evpd*/TRUE, SVPD_SUPPORTED_PAGE_LIST, SSD_MIN_SIZE, /*timeout*/60 * 1000); break; } /* * We'll have to do without, let our probedone * routine finish up for us. */ start_ccb->csio.data_ptr = NULL; probedone(periph, start_ccb); return; } case PROBE_SERIAL_NUM_1: { struct scsi_vpd_unit_serial_number *serial_buf; struct cam_ed* device; serial_buf = NULL; device = periph->path->device; device->serial_num = NULL; device->serial_num_len = 0; serial_buf = (struct scsi_vpd_unit_serial_number *) kmalloc(sizeof(*serial_buf), M_CAMXPT, M_INTWAIT | M_ZERO); scsi_inquiry(csio, /*retries*/4, probedone, MSG_SIMPLE_Q_TAG, (u_int8_t *)serial_buf, sizeof(*serial_buf), /*evpd*/TRUE, SVPD_UNIT_SERIAL_NUMBER, SSD_MIN_SIZE, /*timeout*/60 * 1000); break; } } xpt_action(start_ccb); } static void proberequestdefaultnegotiation(struct cam_periph *periph) { struct ccb_trans_settings cts; xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1); cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; cts.type = CTS_TYPE_USER_SETTINGS; xpt_action((union ccb *)&cts); if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { return; } cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; cts.type = CTS_TYPE_CURRENT_SETTINGS; xpt_action((union ccb *)&cts); } /* * Backoff Negotiation Code- only pertinent for SPI devices. */ static int proberequestbackoff(struct cam_periph *periph, struct cam_ed *device) { struct ccb_trans_settings cts; struct ccb_trans_settings_spi *spi; memset(&cts, 0, sizeof (cts)); xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1); cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; cts.type = CTS_TYPE_CURRENT_SETTINGS; xpt_action((union ccb *)&cts); if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { if (bootverbose) { xpt_print(periph->path, "failed to get current device settings\n"); } return (0); } if (cts.transport != XPORT_SPI) { if (bootverbose) { xpt_print(periph->path, "not SPI transport\n"); } return (0); } spi = &cts.xport_specific.spi; /* * We cannot renegotiate sync rate if we don't have one. */ if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) { if (bootverbose) { xpt_print(periph->path, "no sync rate known\n"); } return (0); } /* * We'll assert that we don't have to touch PPR options- the * SIM will see what we do with period and offset and adjust * the PPR options as appropriate. */ /* * A sync rate with unknown or zero offset is nonsensical. * A sync period of zero means Async. */ if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0 || spi->sync_offset == 0 || spi->sync_period == 0) { if (bootverbose) { xpt_print(periph->path, "no sync rate available\n"); } return (0); } if (device->flags & CAM_DEV_DV_HIT_BOTTOM) { CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("hit async: giving up on DV\n")); return (0); } /* * Jump sync_period up by one, but stop at 5MHz and fall back to Async. * We don't try to remember 'last' settings to see if the SIM actually * gets into the speed we want to set. We check on the SIM telling * us that a requested speed is bad, but otherwise don't try and * check the speed due to the asynchronous and handshake nature * of speed setting. */ spi->valid = CTS_SPI_VALID_SYNC_RATE | CTS_SPI_VALID_SYNC_OFFSET; for (;;) { spi->sync_period++; if (spi->sync_period >= 0xf) { spi->sync_period = 0; spi->sync_offset = 0; CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("setting to async for DV\n")); /* * Once we hit async, we don't want to try * any more settings. */ device->flags |= CAM_DEV_DV_HIT_BOTTOM; } else if (bootverbose) { CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("DV: period 0x%x\n", spi->sync_period)); kprintf("setting period to 0x%x\n", spi->sync_period); } cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; cts.type = CTS_TYPE_CURRENT_SETTINGS; xpt_action((union ccb *)&cts); if ((cts.ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { break; } CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("DV: failed to set period 0x%x\n", spi->sync_period)); if (spi->sync_period == 0) { return (0); } } return (1); } static void probedone(struct cam_periph *periph, union ccb *done_ccb) { probe_softc *softc; struct cam_path *path; u_int32_t priority; CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probedone\n")); softc = (probe_softc *)periph->softc; path = done_ccb->ccb_h.path; priority = done_ccb->ccb_h.pinfo.priority; switch (softc->action) { case PROBE_TUR: { if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { if (cam_periph_error(done_ccb, 0, SF_NO_PRINT, NULL) == ERESTART) return; else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) /* Don't wedge the queue */ xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, /*run_queue*/TRUE); } softc->action = PROBE_INQUIRY; xpt_release_ccb(done_ccb); xpt_schedule(periph, priority); return; } case PROBE_INQUIRY: case PROBE_FULL_INQUIRY: { if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { struct scsi_inquiry_data *inq_buf; u_int8_t periph_qual; path->device->flags |= CAM_DEV_INQUIRY_DATA_VALID; inq_buf = &path->device->inq_data; periph_qual = SID_QUAL(inq_buf); switch(periph_qual) { case SID_QUAL_LU_CONNECTED: { u_int8_t len; /* * We conservatively request only * SHORT_INQUIRY_LEN bytes of inquiry * information during our first try * at sending an INQUIRY. If the device * has more information to give, * perform a second request specifying * the amount of information the device * is willing to give. */ len = inq_buf->additional_length + offsetof(struct scsi_inquiry_data, additional_length) + 1; if (softc->action == PROBE_INQUIRY && len > SHORT_INQUIRY_LENGTH) { softc->action = PROBE_FULL_INQUIRY; xpt_release_ccb(done_ccb); xpt_schedule(periph, priority); return; } xpt_find_quirk(path->device); xpt_devise_transport(path); if (INQ_DATA_TQ_ENABLED(inq_buf)) softc->action = PROBE_MODE_SENSE; else softc->action = PROBE_SERIAL_NUM_0; path->device->flags &= ~CAM_DEV_UNCONFIGURED; xpt_reference_device(path->device); xpt_release_ccb(done_ccb); xpt_schedule(periph, priority); return; } default: break; } } else if (cam_periph_error(done_ccb, 0, done_ccb->ccb_h.target_lun > 0 ? SF_RETRY_UA|SF_QUIET_IR : SF_RETRY_UA, &softc->saved_ccb) == ERESTART) { return; } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { /* Don't wedge the queue */ xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, /*run_queue*/TRUE); } /* * If we get to this point, we got an error status back * from the inquiry and the error status doesn't require * automatically retrying the command. Therefore, the * inquiry failed. If we had inquiry information before * for this device, but this latest inquiry command failed, * the device has probably gone away. If this device isn't * already marked unconfigured, notify the peripheral * drivers that this device is no more. */ if ((path->device->flags & CAM_DEV_UNCONFIGURED) == 0) { /* Send the async notification. */ xpt_async(AC_LOST_DEVICE, path, NULL); } xpt_release_ccb(done_ccb); break; } case PROBE_MODE_SENSE: { struct ccb_scsiio *csio; struct scsi_mode_header_6 *mode_hdr; csio = &done_ccb->csio; mode_hdr = (struct scsi_mode_header_6 *)csio->data_ptr; if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { struct scsi_control_page *page; u_int8_t *offset; offset = ((u_int8_t *)&mode_hdr[1]) + mode_hdr->blk_desc_len; page = (struct scsi_control_page *)offset; path->device->queue_flags = page->queue_flags; } else if (cam_periph_error(done_ccb, 0, SF_RETRY_UA|SF_NO_PRINT, &softc->saved_ccb) == ERESTART) { return; } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { /* Don't wedge the queue */ xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, /*run_queue*/TRUE); } xpt_release_ccb(done_ccb); kfree(mode_hdr, M_CAMXPT); softc->action = PROBE_SERIAL_NUM_0; xpt_schedule(periph, priority); return; } case PROBE_SERIAL_NUM_0: { struct ccb_scsiio *csio; struct scsi_vpd_supported_page_list *page_list; int length, serialnum_supported, i; serialnum_supported = 0; csio = &done_ccb->csio; page_list = (struct scsi_vpd_supported_page_list *)csio->data_ptr; if (page_list == NULL) { /* * Don't process the command as it was never sent */ } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP && (page_list->length > 0)) { length = min(page_list->length, SVPD_SUPPORTED_PAGES_SIZE); for (i = 0; i < length; i++) { if (page_list->list[i] == SVPD_UNIT_SERIAL_NUMBER) { serialnum_supported = 1; break; } } } else if (cam_periph_error(done_ccb, 0, SF_RETRY_UA|SF_NO_PRINT, &softc->saved_ccb) == ERESTART) { return; } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { /* Don't wedge the queue */ xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, /*run_queue*/TRUE); } if (page_list != NULL) kfree(page_list, M_DEVBUF); if (serialnum_supported) { xpt_release_ccb(done_ccb); softc->action = PROBE_SERIAL_NUM_1; xpt_schedule(periph, priority); return; } xpt_release_ccb(done_ccb); softc->action = PROBE_TUR_FOR_NEGOTIATION; xpt_schedule(periph, done_ccb->ccb_h.pinfo.priority); return; } case PROBE_SERIAL_NUM_1: { struct ccb_scsiio *csio; struct scsi_vpd_unit_serial_number *serial_buf; u_int32_t priority; int changed; int have_serialnum; changed = 1; have_serialnum = 0; csio = &done_ccb->csio; priority = done_ccb->ccb_h.pinfo.priority; serial_buf = (struct scsi_vpd_unit_serial_number *)csio->data_ptr; /* Clean up from previous instance of this device */ if (path->device->serial_num != NULL) { kfree(path->device->serial_num, M_CAMXPT); path->device->serial_num = NULL; path->device->serial_num_len = 0; } if (serial_buf == NULL) { /* * Don't process the command as it was never sent */ } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP && (serial_buf->length > 0)) { have_serialnum = 1; path->device->serial_num = kmalloc((serial_buf->length + 1), M_CAMXPT, M_INTWAIT); bcopy(serial_buf->serial_num, path->device->serial_num, serial_buf->length); path->device->serial_num_len = serial_buf->length; path->device->serial_num[serial_buf->length] = '\0'; } else if (cam_periph_error(done_ccb, 0, SF_RETRY_UA|SF_NO_PRINT, &softc->saved_ccb) == ERESTART) { return; } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { /* Don't wedge the queue */ xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, /*run_queue*/TRUE); } /* * Let's see if we have seen this device before. */ if ((softc->flags & PROBE_INQUIRY_CKSUM) != 0) { MD5_CTX context; u_int8_t digest[16]; MD5Init(&context); MD5Update(&context, (unsigned char *)&path->device->inq_data, sizeof(struct scsi_inquiry_data)); if (have_serialnum) MD5Update(&context, serial_buf->serial_num, serial_buf->length); MD5Final(digest, &context); if (bcmp(softc->digest, digest, 16) == 0) changed = 0; /* * XXX Do we need to do a TUR in order to ensure * that the device really hasn't changed??? */ if ((changed != 0) && ((softc->flags & PROBE_NO_ANNOUNCE) == 0)) xpt_async(AC_LOST_DEVICE, path, NULL); } if (serial_buf != NULL) kfree(serial_buf, M_CAMXPT); if (changed != 0) { /* * Now that we have all the necessary * information to safely perform transfer * negotiations... Controllers don't perform * any negotiation or tagged queuing until * after the first XPT_SET_TRAN_SETTINGS ccb is * received. So, on a new device, just retrieve * the user settings, and set them as the current * settings to set the device up. */ proberequestdefaultnegotiation(periph); xpt_release_ccb(done_ccb); /* * Perform a TUR to allow the controller to * perform any necessary transfer negotiation. */ softc->action = PROBE_TUR_FOR_NEGOTIATION; xpt_schedule(periph, priority); return; } xpt_release_ccb(done_ccb); break; } case PROBE_TUR_FOR_NEGOTIATION: case PROBE_DV_EXIT: if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { /* Don't wedge the queue */ xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, /*run_queue*/TRUE); } xpt_reference_device(path->device); /* * Do Domain Validation for lun 0 on devices that claim * to support Synchronous Transfer modes. */ if (softc->action == PROBE_TUR_FOR_NEGOTIATION && done_ccb->ccb_h.target_lun == 0 && (path->device->inq_data.flags & SID_Sync) != 0 && (path->device->flags & CAM_DEV_IN_DV) == 0) { CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("Begin Domain Validation\n")); path->device->flags |= CAM_DEV_IN_DV; xpt_release_ccb(done_ccb); softc->action = PROBE_INQUIRY_BASIC_DV1; xpt_schedule(periph, priority); return; } if (softc->action == PROBE_DV_EXIT) { CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("Leave Domain Validation\n")); } path->device->flags &= ~(CAM_DEV_UNCONFIGURED|CAM_DEV_IN_DV|CAM_DEV_DV_HIT_BOTTOM); if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) { /* Inform the XPT that a new device has been found */ done_ccb->ccb_h.func_code = XPT_GDEV_TYPE; xpt_action(done_ccb); xpt_async(AC_FOUND_DEVICE, done_ccb->ccb_h.path, done_ccb); } xpt_release_ccb(done_ccb); break; case PROBE_INQUIRY_BASIC_DV1: case PROBE_INQUIRY_BASIC_DV2: { struct scsi_inquiry_data *nbuf; struct ccb_scsiio *csio; if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { /* Don't wedge the queue */ xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, /*run_queue*/TRUE); } csio = &done_ccb->csio; nbuf = (struct scsi_inquiry_data *)csio->data_ptr; if (bcmp(nbuf, &path->device->inq_data, SHORT_INQUIRY_LENGTH)) { xpt_print(path, "inquiry data fails comparison at DV%d step\n", softc->action == PROBE_INQUIRY_BASIC_DV1 ? 1 : 2); if (proberequestbackoff(periph, path->device)) { path->device->flags &= ~CAM_DEV_IN_DV; softc->action = PROBE_TUR_FOR_NEGOTIATION; } else { /* give up */ softc->action = PROBE_DV_EXIT; } kfree(nbuf, M_CAMXPT); xpt_release_ccb(done_ccb); xpt_schedule(periph, priority); return; } kfree(nbuf, M_CAMXPT); if (softc->action == PROBE_INQUIRY_BASIC_DV1) { softc->action = PROBE_INQUIRY_BASIC_DV2; xpt_release_ccb(done_ccb); xpt_schedule(periph, priority); return; } if (softc->action == PROBE_DV_EXIT) { CAM_DEBUG(periph->path, CAM_DEBUG_INFO, ("Leave Domain Validation Successfully\n")); } path->device->flags &= ~(CAM_DEV_UNCONFIGURED|CAM_DEV_IN_DV|CAM_DEV_DV_HIT_BOTTOM); if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) { /* Inform the XPT that a new device has been found */ done_ccb->ccb_h.func_code = XPT_GDEV_TYPE; xpt_action(done_ccb); xpt_async(AC_FOUND_DEVICE, done_ccb->ccb_h.path, done_ccb); } xpt_release_ccb(done_ccb); break; } } done_ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); TAILQ_REMOVE(&softc->request_ccbs, &done_ccb->ccb_h, periph_links.tqe); done_ccb->ccb_h.status = CAM_REQ_CMP; xpt_done(done_ccb); if (TAILQ_FIRST(&softc->request_ccbs) == NULL) { cam_periph_invalidate(periph); cam_periph_release(periph); } else { probeschedule(periph); } } static void probecleanup(struct cam_periph *periph) { kfree(periph->softc, M_CAMXPT); } static void xpt_find_quirk(struct cam_ed *device) { caddr_t match; match = cam_quirkmatch((caddr_t)&device->inq_data, (caddr_t)xpt_quirk_table, NELEM(xpt_quirk_table), sizeof(*xpt_quirk_table), scsi_inquiry_match); if (match == NULL) panic("xpt_find_quirk: device didn't match wildcard entry!!"); device->quirk = (struct xpt_quirk_entry *)match; } static int sysctl_cam_search_luns(SYSCTL_HANDLER_ARGS) { int error, bool; bool = cam_srch_hi; error = sysctl_handle_int(oidp, &bool, 0, req); if (error != 0 || req->newptr == NULL) return (error); if (bool == 0 || bool == 1) { cam_srch_hi = bool; return (0); } else { return (EINVAL); } } static void xpt_devise_transport(struct cam_path *path) { struct ccb_pathinq cpi; struct ccb_trans_settings cts; struct scsi_inquiry_data *inq_buf; /* Get transport information from the SIM */ xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); cpi.ccb_h.func_code = XPT_PATH_INQ; xpt_action((union ccb *)&cpi); inq_buf = NULL; if ((path->device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0) inq_buf = &path->device->inq_data; path->device->protocol = PROTO_SCSI; path->device->protocol_version = inq_buf != NULL ? SID_ANSI_REV(inq_buf) : cpi.protocol_version; path->device->transport = cpi.transport; path->device->transport_version = cpi.transport_version; /* * Any device not using SPI3 features should * be considered SPI2 or lower. */ if (inq_buf != NULL) { if (path->device->transport == XPORT_SPI && (inq_buf->spi3data & SID_SPI_MASK) == 0 && path->device->transport_version > 2) path->device->transport_version = 2; } else { struct cam_ed* otherdev; for (otherdev = TAILQ_FIRST(&path->target->ed_entries); otherdev != NULL; otherdev = TAILQ_NEXT(otherdev, links)) { if (otherdev != path->device) break; } if (otherdev != NULL) { /* * Initially assume the same versioning as * prior luns for this target. */ path->device->protocol_version = otherdev->protocol_version; path->device->transport_version = otherdev->transport_version; } else { /* Until we know better, opt for safty */ path->device->protocol_version = 2; if (path->device->transport == XPORT_SPI) path->device->transport_version = 2; else path->device->transport_version = 0; } } /* * XXX * For a device compliant with SPC-2 we should be able * to determine the transport version supported by * scrutinizing the version descriptors in the * inquiry buffer. */ /* Tell the controller what we think */ xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1); cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; cts.type = CTS_TYPE_CURRENT_SETTINGS; cts.transport = path->device->transport; cts.transport_version = path->device->transport_version; cts.protocol = path->device->protocol; cts.protocol_version = path->device->protocol_version; cts.proto_specific.valid = 0; cts.xport_specific.valid = 0; xpt_action((union ccb *)&cts); } static void xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device, int async_update) { struct ccb_pathinq cpi; struct ccb_trans_settings cur_cts; struct ccb_trans_settings_scsi *scsi; struct ccb_trans_settings_scsi *cur_scsi; struct cam_sim *sim; struct scsi_inquiry_data *inq_data; if (device == NULL) { cts->ccb_h.status = CAM_PATH_INVALID; xpt_done((union ccb *)cts); return; } if (cts->protocol == PROTO_UNKNOWN || cts->protocol == PROTO_UNSPECIFIED) { cts->protocol = device->protocol; cts->protocol_version = device->protocol_version; } if (cts->protocol_version == PROTO_VERSION_UNKNOWN || cts->protocol_version == PROTO_VERSION_UNSPECIFIED) cts->protocol_version = device->protocol_version; if (cts->protocol != device->protocol) { xpt_print(cts->ccb_h.path, "Uninitialized Protocol %x:%x?\n", cts->protocol, device->protocol); cts->protocol = device->protocol; } if (cts->protocol_version > device->protocol_version) { if (bootverbose) { xpt_print(cts->ccb_h.path, "Down reving Protocol " "Version from %d to %d?\n", cts->protocol_version, device->protocol_version); } cts->protocol_version = device->protocol_version; } if (cts->transport == XPORT_UNKNOWN || cts->transport == XPORT_UNSPECIFIED) { cts->transport = device->transport; cts->transport_version = device->transport_version; } if (cts->transport_version == XPORT_VERSION_UNKNOWN || cts->transport_version == XPORT_VERSION_UNSPECIFIED) cts->transport_version = device->transport_version; if (cts->transport != device->transport) { xpt_print(cts->ccb_h.path, "Uninitialized Transport %x:%x?\n", cts->transport, device->transport); cts->transport = device->transport; } if (cts->transport_version > device->transport_version) { if (bootverbose) { xpt_print(cts->ccb_h.path, "Down reving Transport " "Version from %d to %d?\n", cts->transport_version, device->transport_version); } cts->transport_version = device->transport_version; } sim = cts->ccb_h.path->bus->sim; /* * Nothing more of interest to do unless * this is a device connected via the * SCSI protocol. */ if (cts->protocol != PROTO_SCSI) { if (async_update == FALSE) (*(sim->sim_action))(sim, (union ccb *)cts); return; } inq_data = &device->inq_data; scsi = &cts->proto_specific.scsi; xpt_setup_ccb(&cpi.ccb_h, cts->ccb_h.path, /*priority*/1); cpi.ccb_h.func_code = XPT_PATH_INQ; xpt_action((union ccb *)&cpi); /* SCSI specific sanity checking */ if ((cpi.hba_inquiry & PI_TAG_ABLE) == 0 || (INQ_DATA_TQ_ENABLED(inq_data)) == 0 || (device->queue_flags & SCP_QUEUE_DQUE) != 0 || (device->quirk->mintags == 0)) { /* * Can't tag on hardware that doesn't support tags, * doesn't have it enabled, or has broken tag support. */ scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; } if (async_update == FALSE) { /* * Perform sanity checking against what the * controller and device can do. */ xpt_setup_ccb(&cur_cts.ccb_h, cts->ccb_h.path, /*priority*/1); cur_cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; cur_cts.type = cts->type; xpt_action((union ccb *)&cur_cts); if ((cur_cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { return; } cur_scsi = &cur_cts.proto_specific.scsi; if ((scsi->valid & CTS_SCSI_VALID_TQ) == 0) { scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; scsi->flags |= cur_scsi->flags & CTS_SCSI_FLAGS_TAG_ENB; } if ((cur_scsi->valid & CTS_SCSI_VALID_TQ) == 0) scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; } /* SPI specific sanity checking */ if (cts->transport == XPORT_SPI && async_update == FALSE) { u_int spi3caps; struct ccb_trans_settings_spi *spi; struct ccb_trans_settings_spi *cur_spi; spi = &cts->xport_specific.spi; cur_spi = &cur_cts.xport_specific.spi; /* Fill in any gaps in what the user gave us */ if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) spi->sync_period = cur_spi->sync_period; if ((cur_spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) spi->sync_period = 0; if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0) spi->sync_offset = cur_spi->sync_offset; if ((cur_spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0) spi->sync_offset = 0; if ((spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0) spi->ppr_options = cur_spi->ppr_options; if ((cur_spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0) spi->ppr_options = 0; if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0) spi->bus_width = cur_spi->bus_width; if ((cur_spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0) spi->bus_width = 0; if ((spi->valid & CTS_SPI_VALID_DISC) == 0) { spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB; spi->flags |= cur_spi->flags & CTS_SPI_FLAGS_DISC_ENB; } if ((cur_spi->valid & CTS_SPI_VALID_DISC) == 0) spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB; if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0 && (inq_data->flags & SID_Sync) == 0 && cts->type == CTS_TYPE_CURRENT_SETTINGS) || ((cpi.hba_inquiry & PI_SDTR_ABLE) == 0) || (spi->sync_offset == 0) || (spi->sync_period == 0)) { /* Force async */ spi->sync_period = 0; spi->sync_offset = 0; } switch (spi->bus_width) { case MSG_EXT_WDTR_BUS_32_BIT: if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 || (inq_data->flags & SID_WBus32) != 0 || cts->type == CTS_TYPE_USER_SETTINGS) && (cpi.hba_inquiry & PI_WIDE_32) != 0) break; /* Fall Through to 16-bit */ case MSG_EXT_WDTR_BUS_16_BIT: if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 || (inq_data->flags & SID_WBus16) != 0 || cts->type == CTS_TYPE_USER_SETTINGS) && (cpi.hba_inquiry & PI_WIDE_16) != 0) { spi->bus_width = MSG_EXT_WDTR_BUS_16_BIT; break; } /* Fall Through to 8-bit */ default: /* New bus width?? */ case MSG_EXT_WDTR_BUS_8_BIT: /* All targets can do this */ spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT; break; } spi3caps = cpi.xport_specific.spi.ppr_options; if ((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0 && cts->type == CTS_TYPE_CURRENT_SETTINGS) spi3caps &= inq_data->spi3data; if ((spi3caps & SID_SPI_CLOCK_DT) == 0) spi->ppr_options &= ~MSG_EXT_PPR_DT_REQ; if ((spi3caps & SID_SPI_IUS) == 0) spi->ppr_options &= ~MSG_EXT_PPR_IU_REQ; if ((spi3caps & SID_SPI_QAS) == 0) spi->ppr_options &= ~MSG_EXT_PPR_QAS_REQ; /* No SPI Transfer settings are allowed unless we are wide */ if (spi->bus_width == 0) spi->ppr_options = 0; if ((spi->flags & CTS_SPI_FLAGS_DISC_ENB) == 0) { /* * Can't tag queue without disconnection. */ scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; scsi->valid |= CTS_SCSI_VALID_TQ; } /* * If we are currently performing tagged transactions to * this device and want to change its negotiation parameters, * go non-tagged for a bit to give the controller a chance to * negotiate unhampered by tag messages. */ if (cts->type == CTS_TYPE_CURRENT_SETTINGS && (device->inq_flags & SID_CmdQue) != 0 && (scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0 && (spi->flags & (CTS_SPI_VALID_SYNC_RATE| CTS_SPI_VALID_SYNC_OFFSET| CTS_SPI_VALID_BUS_WIDTH)) != 0) xpt_toggle_tags(cts->ccb_h.path); } if (cts->type == CTS_TYPE_CURRENT_SETTINGS && (scsi->valid & CTS_SCSI_VALID_TQ) != 0) { int device_tagenb; /* * If we are transitioning from tags to no-tags or * vice-versa, we need to carefully freeze and restart * the queue so that we don't overlap tagged and non-tagged * commands. We also temporarily stop tags if there is * a change in transfer negotiation settings to allow * "tag-less" negotiation. */ if ((device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 || (device->inq_flags & SID_CmdQue) != 0) device_tagenb = TRUE; else device_tagenb = FALSE; if (((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0 && device_tagenb == FALSE) || ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) == 0 && device_tagenb == TRUE)) { if ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0) { /* * Delay change to use tags until after a * few commands have gone to this device so * the controller has time to perform transfer * negotiations without tagged messages getting * in the way. */ device->tag_delay_count = CAM_TAG_DELAY_COUNT; device->flags |= CAM_DEV_TAG_AFTER_COUNT; } else { struct ccb_relsim crs; xpt_freeze_devq(cts->ccb_h.path, /*count*/1); device->inq_flags &= ~SID_CmdQue; xpt_dev_ccbq_resize(cts->ccb_h.path, sim->max_dev_openings); device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; device->tag_delay_count = 0; xpt_setup_ccb(&crs.ccb_h, cts->ccb_h.path, /*priority*/1); crs.ccb_h.func_code = XPT_REL_SIMQ; crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; crs.openings = crs.release_timeout = crs.qfrozen_cnt = 0; xpt_action((union ccb *)&crs); } } } if (async_update == FALSE) (*(sim->sim_action))(sim, (union ccb *)cts); } static void xpt_toggle_tags(struct cam_path *path) { struct cam_ed *dev; /* * Give controllers a chance to renegotiate * before starting tag operations. We * "toggle" tagged queuing off then on * which causes the tag enable command delay * counter to come into effect. */ dev = path->device; if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 || ((dev->inq_flags & SID_CmdQue) != 0 && (dev->inq_flags & (SID_Sync|SID_WBus16|SID_WBus32)) != 0)) { struct ccb_trans_settings cts; xpt_setup_ccb(&cts.ccb_h, path, 1); cts.protocol = PROTO_SCSI; cts.protocol_version = PROTO_VERSION_UNSPECIFIED; cts.transport = XPORT_UNSPECIFIED; cts.transport_version = XPORT_VERSION_UNSPECIFIED; cts.proto_specific.scsi.flags = 0; cts.proto_specific.scsi.valid = CTS_SCSI_VALID_TQ; xpt_set_transfer_settings(&cts, path->device, /*async_update*/TRUE); cts.proto_specific.scsi.flags = CTS_SCSI_FLAGS_TAG_ENB; xpt_set_transfer_settings(&cts, path->device, /*async_update*/TRUE); } } static void xpt_start_tags(struct cam_path *path) { struct ccb_relsim crs; struct cam_ed *device; struct cam_sim *sim; int newopenings; device = path->device; sim = path->bus->sim; device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; xpt_freeze_devq(path, /*count*/1); device->inq_flags |= SID_CmdQue; if (device->tag_saved_openings != 0) newopenings = device->tag_saved_openings; else newopenings = min(device->quirk->maxtags, sim->max_tagged_dev_openings); xpt_dev_ccbq_resize(path, newopenings); xpt_setup_ccb(&crs.ccb_h, path, /*priority*/1); crs.ccb_h.func_code = XPT_REL_SIMQ; crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; crs.openings = crs.release_timeout = crs.qfrozen_cnt = 0; xpt_action((union ccb *)&crs); } static int busses_to_config; static int busses_to_reset; static int xptconfigbuscountfunc(struct cam_eb *bus, void *arg) { sim_lock_assert_owned(bus->sim->lock); if (bus->counted_to_config == 0 && bus->path_id != CAM_XPT_PATH_ID) { struct cam_path path; struct ccb_pathinq cpi; int can_negotiate; if (bootverbose) { kprintf("CAM: Configuring bus:"); if (bus->sim) { kprintf(" %s%d\n", bus->sim->sim_name, bus->sim->unit_number); } else { kprintf(" (unknown)\n"); } } atomic_add_int(&busses_to_config, 1); bus->counted_to_config = 1; xpt_compile_path(&path, NULL, bus->path_id, CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); cpi.ccb_h.func_code = XPT_PATH_INQ; xpt_action((union ccb *)&cpi); can_negotiate = cpi.hba_inquiry; can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); if ((cpi.hba_misc & PIM_NOBUSRESET) == 0 && can_negotiate) busses_to_reset++; xpt_release_path(&path); } else if (bus->counted_to_config == 0 && bus->path_id == CAM_XPT_PATH_ID) { /* this is our dummy periph/bus */ atomic_add_int(&busses_to_config, 1); bus->counted_to_config = 1; } return(1); } static int xptconfigfunc(struct cam_eb *bus, void *arg) { struct cam_path *path; union ccb *work_ccb; sim_lock_assert_owned(bus->sim->lock); if (bus->path_id != CAM_XPT_PATH_ID) { cam_status status; int can_negotiate; work_ccb = xpt_alloc_ccb(); if ((status = xpt_create_path(&path, xpt_periph, bus->path_id, CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD)) !=CAM_REQ_CMP){ kprintf("xptconfigfunc: xpt_create_path failed with " "status %#x for bus %d\n", status, bus->path_id); kprintf("xptconfigfunc: halting bus configuration\n"); xpt_free_ccb(work_ccb); xpt_uncount_bus(bus); return(0); } xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); work_ccb->ccb_h.func_code = XPT_PATH_INQ; xpt_action(work_ccb); if (work_ccb->ccb_h.status != CAM_REQ_CMP) { kprintf("xptconfigfunc: CPI failed on bus %d " "with status %d\n", bus->path_id, work_ccb->ccb_h.status); xpt_finishconfig(xpt_periph, work_ccb); return(1); } can_negotiate = work_ccb->cpi.hba_inquiry; can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); if ((work_ccb->cpi.hba_misc & PIM_NOBUSRESET) == 0 && (can_negotiate != 0)) { xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); work_ccb->ccb_h.func_code = XPT_RESET_BUS; work_ccb->ccb_h.cbfcnp = NULL; CAM_DEBUG(path, CAM_DEBUG_SUBTRACE, ("Resetting Bus\n")); xpt_action(work_ccb); xpt_finishconfig(xpt_periph, work_ccb); } else { /* Act as though we performed a successful BUS RESET */ work_ccb->ccb_h.func_code = XPT_RESET_BUS; xpt_finishconfig(xpt_periph, work_ccb); } } else { xpt_uncount_bus(bus); } return(1); } /* * Now that interrupts are enabled, go find our devices. * * This hook function is called once by run_interrupt_driven_config_hooks(). * XPT is expected to disestablish its hook when done. */ static void xpt_config(void *arg) { #ifdef CAMDEBUG /* Setup debugging flags and path */ #ifdef CAM_DEBUG_FLAGS cam_dflags = CAM_DEBUG_FLAGS; #else /* !CAM_DEBUG_FLAGS */ cam_dflags = CAM_DEBUG_NONE; #endif /* CAM_DEBUG_FLAGS */ #ifdef CAM_DEBUG_BUS if (cam_dflags != CAM_DEBUG_NONE) { /* * Locking is specifically omitted here. No SIMs have * registered yet, so xpt_create_path will only be searching * empty lists of targets and devices. */ if (xpt_create_path(&cam_dpath, xpt_periph, CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN) != CAM_REQ_CMP) { kprintf("xpt_config: xpt_create_path() failed for debug" " target %d:%d:%d, debugging disabled\n", CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN); cam_dflags = CAM_DEBUG_NONE; } } else { cam_dpath = NULL; } #else /* !CAM_DEBUG_BUS */ cam_dpath = NULL; #endif /* CAM_DEBUG_BUS */ #endif /* CAMDEBUG */ /* * Scan all installed busses. This will also add a count * for our dummy placeholder (xpt_periph). */ xpt_for_all_busses(xptconfigbuscountfunc, NULL); kprintf("CAM: Configuring %d busses\n", busses_to_config - 1); if (busses_to_reset > 0 && scsi_delay >= 2000) { kprintf("Waiting %d seconds for SCSI " "devices to settle\n", scsi_delay/1000); } xpt_for_all_busses(xptconfigfunc, NULL); } /* * If the given device only has one peripheral attached to it, and if that * peripheral is the passthrough driver, announce it. This insures that the * user sees some sort of announcement for every peripheral in their system. */ static int xptpassannouncefunc(struct cam_ed *device, void *arg) { struct cam_periph *periph; int i; for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL; periph = SLIST_NEXT(periph, periph_links), i++); periph = SLIST_FIRST(&device->periphs); if ((i == 1) && (strncmp(periph->periph_name, "pass", 4) == 0)) xpt_announce_periph(periph, NULL); return(1); } static void xpt_finishconfig_task(void *context, int pending) { struct periph_driver **p_drv; int i; kprintf("CAM: finished configuring all busses\n"); if (busses_to_config == 0) { /* Register all the peripheral drivers */ /* XXX This will have to change when we have loadable modules */ p_drv = periph_drivers; for (i = 0; p_drv[i] != NULL; i++) { (*p_drv[i]->init)(); } /* * Check for devices with no "standard" peripheral driver * attached. For any devices like that, announce the * passthrough driver so the user will see something. */ xpt_for_all_devices(xptpassannouncefunc, NULL); /* Release our hook so that the boot can continue. */ config_intrhook_disestablish(xsoftc.xpt_config_hook); kfree(xsoftc.xpt_config_hook, M_CAMXPT); xsoftc.xpt_config_hook = NULL; } kfree(context, M_CAMXPT); } static void xpt_uncount_bus (struct cam_eb *bus) { struct xpt_task *task; if (bus->counted_to_config) { bus->counted_to_config = 0; if (atomic_fetchadd_int(&busses_to_config, -1) == 1) { task = kmalloc(sizeof(struct xpt_task), M_CAMXPT, M_INTWAIT | M_ZERO); TASK_INIT(&task->task, 0, xpt_finishconfig_task, task); taskqueue_enqueue(taskqueue_thread[mycpuid], &task->task); } } } static void xpt_finishconfig(struct cam_periph *periph, union ccb *done_ccb) { struct cam_path *path; path = done_ccb->ccb_h.path; CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_finishconfig\n")); switch(done_ccb->ccb_h.func_code) { case XPT_RESET_BUS: if (done_ccb->ccb_h.status == CAM_REQ_CMP) { done_ccb->ccb_h.func_code = XPT_SCAN_BUS; done_ccb->ccb_h.cbfcnp = xpt_finishconfig; done_ccb->crcn.flags = 0; xpt_action(done_ccb); return; } /* FALLTHROUGH */ case XPT_SCAN_BUS: default: if (bootverbose) { kprintf("CAM: Finished configuring bus:"); if (path->bus->sim) { kprintf(" %s%d\n", path->bus->sim->sim_name, path->bus->sim->unit_number); } else { kprintf(" (unknown)\n"); } } xpt_uncount_bus(path->bus); xpt_free_path(path); xpt_free_ccb(done_ccb); break; } } cam_status xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg, struct cam_path *path) { struct ccb_setasync csa; cam_status status; int xptpath = 0; if (path == NULL) { lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID, CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); if (status != CAM_REQ_CMP) { lockmgr(&xsoftc.xpt_lock, LK_RELEASE); return (status); } xptpath = 1; } xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5); csa.ccb_h.func_code = XPT_SASYNC_CB; csa.event_enable = event; csa.callback = cbfunc; csa.callback_arg = cbarg; xpt_action((union ccb *)&csa); status = csa.ccb_h.status; if (xptpath) { xpt_free_path(path); lockmgr(&xsoftc.xpt_lock, LK_RELEASE); } return (status); } static void xptaction(struct cam_sim *sim, union ccb *work_ccb) { CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n")); switch (work_ccb->ccb_h.func_code) { /* Common cases first */ case XPT_PATH_INQ: /* Path routing inquiry */ { struct ccb_pathinq *cpi; cpi = &work_ccb->cpi; cpi->version_num = 1; /* XXX??? */ cpi->hba_inquiry = 0; cpi->target_sprt = 0; cpi->hba_misc = 0; cpi->hba_eng_cnt = 0; cpi->max_target = 0; cpi->max_lun = 0; cpi->initiator_id = 0; strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); strncpy(cpi->hba_vid, "", HBA_IDLEN); strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN); cpi->unit_number = sim->unit_number; cpi->bus_id = sim->bus_id; cpi->base_transfer_speed = 0; cpi->protocol = PROTO_UNSPECIFIED; cpi->protocol_version = PROTO_VERSION_UNSPECIFIED; cpi->transport = XPORT_UNSPECIFIED; cpi->transport_version = XPORT_VERSION_UNSPECIFIED; cpi->ccb_h.status = CAM_REQ_CMP; xpt_done(work_ccb); break; } default: work_ccb->ccb_h.status = CAM_REQ_INVALID; xpt_done(work_ccb); break; } } /* * The xpt as a "controller" has no interrupt sources, so polling * is a no-op. */ static void xptpoll(struct cam_sim *sim) { } void xpt_lock_buses(void) { lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); } void xpt_unlock_buses(void) { lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); } /* * Should only be called by the machine interrupt dispatch routines, * so put these prototypes here instead of in the header. */ static void swi_cambio(void *arg, void *frame) { camisr(NULL); } static void camisr(void *dummy) { cam_simq_t queue; struct cam_sim *sim; spin_lock(&cam_simq_spin); TAILQ_INIT(&queue); TAILQ_CONCAT(&queue, &cam_simq, links); spin_unlock(&cam_simq_spin); while ((sim = TAILQ_FIRST(&queue)) != NULL) { TAILQ_REMOVE(&queue, sim, links); CAM_SIM_LOCK(sim); sim->flags &= ~CAM_SIM_ON_DONEQ; camisr_runqueue(sim); CAM_SIM_UNLOCK(sim); } } static void camisr_runqueue(struct cam_sim *sim) { struct ccb_hdr *ccb_h; int runq; spin_lock(&sim->sim_spin); while ((ccb_h = TAILQ_FIRST(&sim->sim_doneq)) != NULL) { TAILQ_REMOVE(&sim->sim_doneq, ccb_h, sim_links.tqe); spin_unlock(&sim->sim_spin); ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE, ("camisr\n")); runq = FALSE; if (ccb_h->flags & CAM_HIGH_POWER) { struct highpowerlist *hphead; struct cam_ed *device; union ccb *send_ccb; lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); hphead = &xsoftc.highpowerq; send_ccb = (union ccb *)STAILQ_FIRST(hphead); /* * Increment the count since this command is done. */ xsoftc.num_highpower++; /* * Any high powered commands queued up? */ if (send_ccb != NULL) { device = send_ccb->ccb_h.path->device; STAILQ_REMOVE_HEAD(hphead, xpt_links.stqe); lockmgr(&xsoftc.xpt_lock, LK_RELEASE); xpt_release_devq(send_ccb->ccb_h.path, /*count*/1, /*runqueue*/TRUE); } else lockmgr(&xsoftc.xpt_lock, LK_RELEASE); } if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) { struct cam_ed *dev; dev = ccb_h->path->device; cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h); /* * devq may be NULL if this is cam_dead_sim */ if (ccb_h->path->bus->sim->devq) { ccb_h->path->bus->sim->devq->send_active--; ccb_h->path->bus->sim->devq->send_openings++; } if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0 && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ) || ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 && (dev->ccbq.dev_active == 0))) { xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE); } if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 && (--dev->tag_delay_count == 0)) xpt_start_tags(ccb_h->path); if ((dev->ccbq.queue.entries > 0) && (dev->qfrozen_cnt == 0) && (device_is_send_queued(dev) == 0)) { runq = xpt_schedule_dev_sendq(ccb_h->path->bus, dev); } } if (ccb_h->status & CAM_RELEASE_SIMQ) { xpt_release_simq(ccb_h->path->bus->sim, /*run_queue*/TRUE); ccb_h->status &= ~CAM_RELEASE_SIMQ; runq = FALSE; } if ((ccb_h->flags & CAM_DEV_QFRZDIS) && (ccb_h->status & CAM_DEV_QFRZN)) { xpt_release_devq(ccb_h->path, /*count*/1, /*run_queue*/TRUE); ccb_h->status &= ~CAM_DEV_QFRZN; } else if (runq) { xpt_run_dev_sendq(ccb_h->path->bus); } /* Call the peripheral driver's callback */ (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h); spin_lock(&sim->sim_spin); } spin_unlock(&sim->sim_spin); } /* * The dead_sim isn't completely hooked into CAM, we have to make sure * the doneq is cleared after calling xpt_done() so cam_periph_ccbwait() * doesn't block. */ static void dead_sim_action(struct cam_sim *sim, union ccb *ccb) { ccb->ccb_h.status = CAM_DEV_NOT_THERE; xpt_done(ccb); camisr_runqueue(sim); } static void dead_sim_poll(struct cam_sim *sim) { }