* Copyright (c) 2003 Hidetoshi Shimokawa

/* $NetBSD: sbp.c,v 1.42 2022/04/12 21:05:37 andvar Exp $ */
/*-
* Copyright (c) 2003 Hidetoshi Shimokawa
* Copyright (c) 1998-2002 Katsushi Kobayashi and Hidetoshi Shimokawa
* 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.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the acknowledgement as bellow:
*
* This product includes software developed by K. Kobayashi and H. Shimokawa
*
* 4. 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 ``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 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/dev/firewire/sbp.c,v 1.100 2009/02/18 18:41:34 sbruno Exp $
*
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: sbp.c,v 1.42 2022/04/12 21:05:37 andvar Exp $");

#include <sys/param.h>
#include <sys/device.h>
#include <sys/errno.h>
#include <sys/buf.h>
#include <sys/callout.h>
#include <sys/condvar.h>
#include <sys/kernel.h>
#include <sys/kthread.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/sysctl.h>

#include <sys/bus.h>

#include <dev/scsipi/scsi_spc.h>
#include <dev/scsipi/scsi_all.h>
#include <dev/scsipi/scsipi_all.h>
#include <dev/scsipi/scsiconf.h>
#include <dev/scsipi/scsipiconf.h>

#include <dev/ieee1394/firewire.h>
#include <dev/ieee1394/firewirereg.h>
#include <dev/ieee1394/fwdma.h>
#include <dev/ieee1394/iec13213.h>
#include <dev/ieee1394/sbp.h>

#include "locators.h"

#define SBP_FWDEV_ALIVE(fwdev) (((fwdev)->status == FWDEVATTACHED) \
&& crom_has_specver((fwdev)->csrrom, CSRVAL_ANSIT10, CSRVAL_T10SBP2))

#define SBP_NUM_TARGETS 8 /* MAX 64 */
#define SBP_NUM_LUNS 64
#define SBP_MAXPHYS MIN(MAXPHYS, (512*1024) /* 512KB */)
#define SBP_DMA_SIZE PAGE_SIZE
#define SBP_LOGIN_SIZE sizeof(struct sbp_login_res)
#define SBP_QUEUE_LEN ((SBP_DMA_SIZE - SBP_LOGIN_SIZE) / sizeof(struct sbp_ocb))
#define SBP_NUM_OCB (SBP_QUEUE_LEN * SBP_NUM_TARGETS)

/*
* STATUS FIFO addressing
* bit
* -----------------------
* 0- 1( 2): 0 (alignment)
* 2- 9( 8): lun
* 10-31(14): unit
* 32-47(16): SBP_BIND_HI
* 48-64(16): bus_id, node_id
*/
#define SBP_BIND_HI 0x1
#define SBP_DEV2ADDR(u, l) \
(((uint64_t)SBP_BIND_HI << 32) |\
(((u) & 0x3fff) << 10) |\
(((l) & 0xff) << 2))
#define SBP_ADDR2UNIT(a) (((a) >> 10) & 0x3fff)
#define SBP_ADDR2LUN(a) (((a) >> 2) & 0xff)
#define SBP_INITIATOR 7

static const char *orb_fun_name[] = {
ORB_FUN_NAMES
};

static int debug = 0;
static int auto_login = 1;
static int max_speed = -1;
static int sbp_cold = 1;
static int ex_login = 1;
static int login_delay = 1000; /* msec */
static int scan_delay = 500; /* msec */
static int use_doorbell = 0;
static int sbp_tags = 0;

static int sysctl_sbp_verify(SYSCTLFN_PROTO, int lower, int upper);
static int sysctl_sbp_verify_max_speed(SYSCTLFN_PROTO);
static int sysctl_sbp_verify_tags(SYSCTLFN_PROTO);

/*
* Setup sysctl(3) MIB, hw.sbp.*
*
* TBD condition CTLFLAG_PERMANENT on being a module or not
*/
SYSCTL_SETUP(sysctl_sbp, "sysctl sbp(4) subtree setup")
{
int rc, sbp_node_num;
const struct sysctlnode *node;

if ((rc = sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT, CTLTYPE_NODE, "sbp",
SYSCTL_DESCR("sbp controls"), NULL, 0, NULL,
0, CTL_HW, CTL_CREATE, CTL_EOL)) != 0)
goto err;
sbp_node_num = node->sysctl_num;

/* sbp auto login flag */
if ((rc = sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT | CTLFLAG_READWRITE, CTLTYPE_INT,
"auto_login", SYSCTL_DESCR("SBP perform login automatically"),
NULL, 0, &auto_login,
0, CTL_HW, sbp_node_num, CTL_CREATE, CTL_EOL)) != 0)
goto err;

/* sbp max speed */
if ((rc = sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT | CTLFLAG_READWRITE, CTLTYPE_INT,
"max_speed", SYSCTL_DESCR("SBP transfer max speed"),
sysctl_sbp_verify_max_speed, 0, &max_speed,
0, CTL_HW, sbp_node_num, CTL_CREATE, CTL_EOL)) != 0)
goto err;

/* sbp exclusive login flag */
if ((rc = sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT | CTLFLAG_READWRITE, CTLTYPE_INT,
"exclusive_login", SYSCTL_DESCR("SBP enable exclusive login"),
NULL, 0, &ex_login,
0, CTL_HW, sbp_node_num, CTL_CREATE, CTL_EOL)) != 0)
goto err;

/* sbp login delay */
if ((rc = sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT | CTLFLAG_READWRITE, CTLTYPE_INT,
"login_delay", SYSCTL_DESCR("SBP login delay in msec"),
NULL, 0, &login_delay,
0, CTL_HW, sbp_node_num, CTL_CREATE, CTL_EOL)) != 0)
goto err;

/* sbp scan delay */
if ((rc = sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT | CTLFLAG_READWRITE, CTLTYPE_INT,
"scan_delay", SYSCTL_DESCR("SBP scan delay in msec"),
NULL, 0, &scan_delay,
0, CTL_HW, sbp_node_num, CTL_CREATE, CTL_EOL)) != 0)
goto err;

/* sbp use doorbell flag */
if ((rc = sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT | CTLFLAG_READWRITE, CTLTYPE_INT,
"use_doorbell", SYSCTL_DESCR("SBP use doorbell request"),
NULL, 0, &use_doorbell,
0, CTL_HW, sbp_node_num, CTL_CREATE, CTL_EOL)) != 0)
goto err;

/* sbp force tagged queuing */
if ((rc = sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT | CTLFLAG_READWRITE, CTLTYPE_INT,
"tags", SYSCTL_DESCR("SBP tagged queuing support"),
sysctl_sbp_verify_tags, 0, &sbp_tags,
0, CTL_HW, sbp_node_num, CTL_CREATE, CTL_EOL)) != 0)
goto err;

/* sbp driver debug flag */
if ((rc = sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT | CTLFLAG_READWRITE, CTLTYPE_INT,
"sbp_debug", SYSCTL_DESCR("SBP debug flag"),
NULL, 0, &debug,
0, CTL_HW, sbp_node_num, CTL_CREATE, CTL_EOL)) != 0)
goto err;

return;

err:
aprint_error("%s: sysctl_createv failed (rc = %d)\n", __func__, rc);
}

static int
sysctl_sbp_verify(SYSCTLFN_ARGS, int lower, int upper)
{
int error, t;
struct sysctlnode node;

node = *rnode;
t = *(int*)rnode->sysctl_data;
node.sysctl_data = &t;
error = sysctl_lookup(SYSCTLFN_CALL(&node));
if (error || newp == NULL)
return error;

if (t < lower || t > upper)
return EINVAL;

*(int*)rnode->sysctl_data = t;

return 0;
}

static int
sysctl_sbp_verify_max_speed(SYSCTLFN_ARGS)
{

return sysctl_sbp_verify(SYSCTLFN_CALL(rnode), 0, FWSPD_S400);
}

static int
sysctl_sbp_verify_tags(SYSCTLFN_ARGS)
{

return sysctl_sbp_verify(SYSCTLFN_CALL(rnode), -1, 1);
}

#define NEED_RESPONSE 0

#define SBP_SEG_MAX rounddown(0xffff, PAGE_SIZE)
#ifdef __sparc64__ /* iommu */
#define SBP_IND_MAX howmany(SBP_MAXPHYS, SBP_SEG_MAX)
#else
#define SBP_IND_MAX howmany(SBP_MAXPHYS, PAGE_SIZE)
#endif
struct sbp_ocb {
uint32_t orb[8];
#define IND_PTR_OFFSET (sizeof(uint32_t) * 8)
struct ind_ptr ind_ptr[SBP_IND_MAX];
struct scsipi_xfer *xs;
struct sbp_dev *sdev;
uint16_t index;
uint16_t flags; /* XXX should be removed */
bus_dmamap_t dmamap;
bus_addr_t bus_addr;
STAILQ_ENTRY(sbp_ocb) ocb;
};

#define SBP_ORB_DMA_SYNC(dma, i, op) \
bus_dmamap_sync((dma).dma_tag, (dma).dma_map, \
sizeof(struct sbp_ocb) * (i), \
sizeof(ocb->orb) + sizeof(ocb->ind_ptr), (op));

#define OCB_ACT_MGM 0
#define OCB_ACT_CMD 1
#define OCB_MATCH(o,s) ((o)->bus_addr == ntohl((s)->orb_lo))

struct sbp_dev{
#define SBP_DEV_RESET 0 /* accept login */
#define SBP_DEV_LOGIN 1 /* to login */
#if 0
#define SBP_DEV_RECONN 2 /* to reconnect */
#endif
#define SBP_DEV_TOATTACH 3 /* to attach */
#define SBP_DEV_PROBE 4 /* scan lun */
#define SBP_DEV_ATTACHED 5 /* in operation */
#define SBP_DEV_DEAD 6 /* unavailable unit */
#define SBP_DEV_RETRY 7 /* unavailable unit */
uint8_t status:4,
timeout:4;
uint8_t type;
uint16_t lun_id;
uint16_t freeze;
#define ORB_LINK_DEAD (1 << 0)
#define VALID_LUN (1 << 1)
#define ORB_POINTER_ACTIVE (1 << 2)
#define ORB_POINTER_NEED (1 << 3)
#define ORB_DOORBELL_ACTIVE (1 << 4)
#define ORB_DOORBELL_NEED (1 << 5)
#define ORB_SHORTAGE (1 << 6)
uint16_t flags;
struct scsipi_periph *periph;
struct sbp_target *target;
struct fwdma_alloc dma;
struct sbp_login_res *login;
struct callout login_callout;
struct sbp_ocb *ocb;
STAILQ_HEAD(, sbp_ocb) ocbs;
STAILQ_HEAD(, sbp_ocb) free_ocbs;
struct sbp_ocb *last_ocb;
char vendor[32];
char product[32];
char revision[10];
char bustgtlun[32];
};

struct sbp_target {
int target_id;
int num_lun;
struct sbp_dev **luns;
struct sbp_softc *sbp;
struct fw_device *fwdev;
uint32_t mgm_hi, mgm_lo;
struct sbp_ocb *mgm_ocb_cur;
STAILQ_HEAD(, sbp_ocb) mgm_ocb_queue;
struct callout mgm_ocb_timeout;
STAILQ_HEAD(, fw_xfer) xferlist;
int n_xfer;
};

struct sbp_softc {
struct firewire_dev_comm sc_fd;
struct scsipi_adapter sc_adapter;
struct scsipi_channel sc_channel;
device_t sc_bus;
struct lwp *sc_lwp;
struct sbp_target sc_target;
struct fw_bind sc_fwb;
bus_dma_tag_t sc_dmat;
struct timeval sc_last_busreset;
int sc_flags;
kmutex_t sc_mtx;
kcondvar_t sc_cv;
};

MALLOC_DEFINE(M_SBP, "sbp", "SBP-II/IEEE1394");
MALLOC_DECLARE(M_SBP);

static int sbpmatch(device_t, cfdata_t, void *);
static void sbpattach(device_t, device_t, void *);
static int sbpdetach(device_t, int);

static void sbp_scsipi_request(struct scsipi_channel *, scsipi_adapter_req_t,
void *);
static void sbp_minphys(struct buf *);

static void sbp_show_sdev_info(struct sbp_dev *);
static void sbp_alloc_lun(struct sbp_target *);
static struct sbp_target *sbp_alloc_target(struct sbp_softc *,
struct fw_device *);
static void sbp_probe_lun(struct sbp_dev *);
static void sbp_login_callout(void *);
static void sbp_login(struct sbp_dev *);
static void sbp_probe_target(void *);
static void sbp_post_busreset(void *);
static void sbp_post_explore(void *);
#if NEED_RESPONSE
static void sbp_loginres_callback(struct fw_xfer *);
#endif
static inline void sbp_xfer_free(struct fw_xfer *);
static void sbp_reset_start_callback(struct fw_xfer *);
static void sbp_reset_start(struct sbp_dev *);
static void sbp_mgm_callback(struct fw_xfer *);
static void sbp_scsipi_scan_target(void *);
static inline void sbp_scan_dev(struct sbp_dev *);
static void sbp_do_attach(struct fw_xfer *);
static void sbp_agent_reset_callback(struct fw_xfer *);
static void sbp_agent_reset(struct sbp_dev *);
static void sbp_busy_timeout_callback(struct fw_xfer *);
static void sbp_busy_timeout(struct sbp_dev *);
static void sbp_orb_pointer_callback(struct fw_xfer *);
static void sbp_orb_pointer(struct sbp_dev *, struct sbp_ocb *);
static void sbp_doorbell_callback(struct fw_xfer *);
static void sbp_doorbell(struct sbp_dev *);
static struct fw_xfer *sbp_write_cmd(struct sbp_dev *, int, int);
static void sbp_mgm_orb(struct sbp_dev *, int, struct sbp_ocb *);
static void sbp_print_scsi_cmd(struct sbp_ocb *);
static void sbp_scsi_status(struct sbp_status *, struct sbp_ocb *);
static void sbp_fix_inq_data(struct sbp_ocb *);
static void sbp_recv(struct fw_xfer *);
static int sbp_logout_all(struct sbp_softc *);
static void sbp_free_sdev(struct sbp_dev *);
static void sbp_free_target(struct sbp_target *);
static void sbp_scsipi_detach_sdev(struct sbp_dev *);
static void sbp_scsipi_detach_target(struct sbp_target *);
static void sbp_target_reset(struct sbp_dev *, int);
static void sbp_mgm_timeout(void *);
static void sbp_timeout(void *);
static void sbp_action1(struct sbp_softc *, struct scsipi_xfer *);
static void sbp_execute_ocb(struct sbp_ocb *, bus_dma_segment_t *, int);
static struct sbp_ocb *sbp_dequeue_ocb(struct sbp_dev *, struct sbp_status *);
static struct sbp_ocb *sbp_enqueue_ocb(struct sbp_dev *, struct sbp_ocb *);
static struct sbp_ocb *sbp_get_ocb(struct sbp_dev *);
static void sbp_free_ocb(struct sbp_dev *, struct sbp_ocb *);
static void sbp_abort_ocb(struct sbp_ocb *, int);
static void sbp_abort_all_ocbs(struct sbp_dev *, int);

static const char *orb_status0[] = {
/* 0 */ "No additional information to report",
/* 1 */ "Request type not supported",
/* 2 */ "Speed not supported",
/* 3 */ "Page size not supported",
/* 4 */ "Access denied",
/* 5 */ "Logical unit not supported",
/* 6 */ "Maximum payload too small",
/* 7 */ "Reserved for future standardization",
/* 8 */ "Resources unavailable",
/* 9 */ "Function rejected",
/* A */ "Login ID not recognized",
/* B */ "Dummy ORB completed",
/* C */ "Request aborted",
/* FF */ "Unspecified error"
#define MAX_ORB_STATUS0 0xd
};

static const char *orb_status1_object[] = {
/* 0 */ "Operation request block (ORB)",
/* 1 */ "Data buffer",
/* 2 */ "Page table",
/* 3 */ "Unable to specify"
};

static const char *orb_status1_serial_bus_error[] = {
/* 0 */ "Missing acknowledge",
/* 1 */ "Reserved; not to be used",
/* 2 */ "Time-out error",
/* 3 */ "Reserved; not to be used",
/* 4 */ "Busy retry limit exceeded(X)",
/* 5 */ "Busy retry limit exceeded(A)",
/* 6 */ "Busy retry limit exceeded(B)",
/* 7 */ "Reserved for future standardization",
/* 8 */ "Reserved for future standardization",
/* 9 */ "Reserved for future standardization",
/* A */ "Reserved for future standardization",
/* B */ "Tardy retry limit exceeded",
/* C */ "Conflict error",
/* D */ "Data error",
/* E */ "Type error",
/* F */ "Address error"
};

CFATTACH_DECL_NEW(sbp, sizeof(struct sbp_softc),
sbpmatch, sbpattach, sbpdetach, NULL);

int
sbpmatch(device_t parent, cfdata_t cf, void *aux)
{
struct fw_attach_args *fwa = aux;

if (strcmp(fwa->name, "sbp") == 0)
return 1;
return 0;
}

static void
sbpattach(device_t parent, device_t self, void *aux)
{
struct sbp_softc *sc = device_private(self);
struct fw_attach_args *fwa = (struct fw_attach_args *)aux;
struct firewire_comm *fc;
struct scsipi_adapter *sc_adapter = &sc->sc_adapter;
struct scsipi_channel *sc_channel = &sc->sc_channel;
struct sbp_target *target = &sc->sc_target;
int dv_unit;

aprint_naive("\n");
aprint_normal(": SBP-2/SCSI over IEEE1394\n");

sc->sc_fd.dev = self;

if (cold)
sbp_cold++;
sc->sc_fd.fc = fc = fwa->fc;
mutex_init(&sc->sc_mtx, MUTEX_DEFAULT, IPL_VM);
cv_init(&sc->sc_cv, "sbp");

if (max_speed < 0)
max_speed = fc->speed;

sc->sc_dmat = fc->dmat;

sc->sc_target.fwdev = NULL;
sc->sc_target.luns = NULL;

/* Initialize mutexes and lists before we can error out
* to prevent crashes on detach
*/
mutex_init(&sc->sc_fwb.fwb_mtx, MUTEX_DEFAULT, IPL_VM);
STAILQ_INIT(&sc->sc_fwb.xferlist);

if (sbp_alloc_target(sc, fwa->fwdev) == NULL)
return;

sc_adapter->adapt_dev = sc->sc_fd.dev;
sc_adapter->adapt_nchannels = 1;
sc_adapter->adapt_max_periph = 1;
sc_adapter->adapt_request = sbp_scsipi_request;
sc_adapter->adapt_minphys = sbp_minphys;
sc_adapter->adapt_openings = 8;

sc_channel->chan_adapter = sc_adapter;
sc_channel->chan_bustype = &scsi_bustype;
sc_channel->chan_defquirks = PQUIRK_ONLYBIG;
sc_channel->chan_channel = 0;
sc_channel->chan_flags = SCSIPI_CHAN_CANGROW | SCSIPI_CHAN_NOSETTLE;

sc_channel->chan_ntargets = 1;
sc_channel->chan_nluns = target->num_lun; /* We set nluns 0 now */
sc_channel->chan_id = 1;

sc->sc_bus = config_found(sc->sc_fd.dev, sc_channel, scsiprint,
CFARGS_NONE);
if (sc->sc_bus == NULL) {
aprint_error_dev(self, "attach failed\n");
return;
}

/* We reserve 16 bit space (4 bytes X 64 unit X 256 luns) */
dv_unit = device_unit(sc->sc_fd.dev);
sc->sc_fwb.start = SBP_DEV2ADDR(dv_unit, 0);
sc->sc_fwb.end = SBP_DEV2ADDR(dv_unit, -1);
/* pre-allocate xfer */
fw_xferlist_add(&sc->sc_fwb.xferlist, M_SBP,
/*send*/ 0, /*recv*/ SBP_RECV_LEN, SBP_NUM_OCB / 2,
fc, (void *)sc, sbp_recv);
fw_bindadd(fc, &sc->sc_fwb);

sc->sc_fd.post_busreset = sbp_post_busreset;
sc->sc_fd.post_explore = sbp_post_explore;

if (fc->status != FWBUSNOTREADY) {
sbp_post_busreset((void *)sc);
sbp_post_explore((void *)sc);
}
}

static int
sbpdetach(device_t self, int flags)
{
struct sbp_softc *sc = device_private(self);
struct firewire_comm *fc = sc->sc_fd.fc;

sbp_scsipi_detach_target(&sc->sc_target);

if (sc->sc_target.fwdev && SBP_FWDEV_ALIVE(sc->sc_target.fwdev)) {
sbp_logout_all(sc);

/* XXX wait for logout completion */
mutex_enter(&sc->sc_mtx);
cv_timedwait_sig(&sc->sc_cv, &sc->sc_mtx, hz/2);
mutex_exit(&sc->sc_mtx);
}

sbp_free_target(&sc->sc_target);

fw_bindremove(fc, &sc->sc_fwb);
fw_xferlist_remove(&sc->sc_fwb.xferlist);
mutex_destroy(&sc->sc_fwb.fwb_mtx);

mutex_destroy(&sc->sc_mtx);
cv_destroy(&sc->sc_cv);

return 0;
}

static void
sbp_scsipi_request(struct scsipi_channel *channel, scsipi_adapter_req_t req,
void *arg)
{
struct sbp_softc *sc = device_private(channel->chan_adapter->adapt_dev);
struct scsipi_xfer *xs = arg;
int i;

SBP_DEBUG(1)
printf("Called sbp_scsipi_request\n");
END_DEBUG

switch (req) {
case ADAPTER_REQ_RUN_XFER:
SBP_DEBUG(1)
printf("Got req_run_xfer\n");
printf("xs control: 0x%08x, timeout: %d\n",
xs->xs_control, xs->timeout);
printf("opcode: 0x%02x\n", (int)xs->cmd->opcode);
for (i = 0; i < 15; i++)
printf("0x%02x ",(int)xs->cmd->bytes[i]);
printf("\n");
END_DEBUG
if (xs->xs_control & XS_CTL_RESET) {
SBP_DEBUG(1)
printf("XS_CTL_RESET not support\n");
END_DEBUG
break;
}
#define SBPSCSI_SBP2_MAX_CDB 12
if (xs->cmdlen > SBPSCSI_SBP2_MAX_CDB) {
SBP_DEBUG(0)
printf(
"sbp doesn't support cdb's larger than %d bytes\n",
SBPSCSI_SBP2_MAX_CDB);
END_DEBUG
xs->error = XS_DRIVER_STUFFUP;
scsipi_done(xs);
return;
}
sbp_action1(sc, xs);

break;
case ADAPTER_REQ_GROW_RESOURCES:
SBP_DEBUG(1)
printf("Got req_grow_resources\n");
END_DEBUG
break;
case ADAPTER_REQ_SET_XFER_MODE:
SBP_DEBUG(1)
printf("Got set xfer mode\n");
END_DEBUG
break;
default:
panic("Unknown request: %d\n", (int)req);
}
}

static void
sbp_minphys(struct buf *bp)
{

minphys(bp);
}

/*
* Display device characteristics on the console
*/
static void
sbp_show_sdev_info(struct sbp_dev *sdev)
{
struct fw_device *fwdev = sdev->target->fwdev;
struct sbp_softc *sc = sdev->target->sbp;

aprint_normal_dev(sc->sc_fd.dev,
"ordered:%d type:%d EUI:%08x%08x node:%d speed:%d maxrec:%d\n",
(sdev->type & 0x40) >> 6,
(sdev->type & 0x1f),
fwdev->eui.hi,
fwdev->eui.lo,
fwdev->dst,
fwdev->speed,
fwdev->maxrec);
aprint_normal_dev(sc->sc_fd.dev, "%s '%s' '%s' '%s'\n",
sdev->bustgtlun, sdev->vendor, sdev->product, sdev->revision);
}

static void
sbp_alloc_lun(struct sbp_target *target)
{
struct crom_context cc;
struct csrreg *reg;
struct sbp_dev *sdev, **newluns;
struct sbp_softc *sc;
int maxlun, lun, i;

sc = target->sbp;
crom_init_context(&cc, target->fwdev->csrrom);
/* XXX should parse appropriate unit directories only */
maxlun = -1;
while (cc.depth >= 0) {
reg = crom_search_key(&cc, CROM_LUN);
if (reg == NULL)
break;
lun = reg->val & 0xffff;
SBP_DEBUG(0)
printf("target %d lun %d found\n", target->target_id, lun);
END_DEBUG
if (maxlun < lun)
maxlun = lun;
crom_next(&cc);
}
if (maxlun < 0)
aprint_normal_dev(sc->sc_fd.dev, "%d: no LUN found\n",
target->target_id);

maxlun++;
if (maxlun >= SBP_NUM_LUNS)
maxlun = SBP_NUM_LUNS;

/* Invalidiate stale devices */
for (lun = 0; lun < target->num_lun; lun++) {
sdev = target->luns[lun];
if (sdev == NULL)
continue;
sdev->flags &= ~VALID_LUN;
if (lun >= maxlun) {
/* lost device */
sbp_scsipi_detach_sdev(sdev);
sbp_free_sdev(sdev);
target->luns[lun] = NULL;
}
}

/* Reallocate */
if (maxlun != target->num_lun) {
newluns = (struct sbp_dev **) realloc(target->luns,
sizeof(struct sbp_dev *) * maxlun,
M_SBP, M_WAITOK | M_ZERO);

/*
* We must zero the extended region for the case
* realloc() doesn't allocate new buffer.
*/
if (maxlun > target->num_lun) {
const int sbp_dev_p_sz = sizeof(struct sbp_dev *);

memset(&newluns[target->num_lun], 0,
sbp_dev_p_sz * (maxlun - target->num_lun));
}

target->luns = newluns;
target->num_lun = maxlun;
}

crom_init_context(&cc, target->fwdev->csrrom);
while (cc.depth >= 0) {
int new = 0;

reg = crom_search_key(&cc, CROM_LUN);
if (reg == NULL)
break;
lun = reg->val & 0xffff;
if (lun >= SBP_NUM_LUNS) {
aprint_error_dev(sc->sc_fd.dev, "too large lun %d\n",
lun);
goto next;
}

sdev = target->luns[lun];
if (sdev == NULL) {
sdev = malloc(sizeof(struct sbp_dev),
M_SBP, M_WAITOK | M_ZERO);
target->luns[lun] = sdev;
sdev->lun_id = lun;
sdev->target = target;
STAILQ_INIT(&sdev->ocbs);
callout_init(&sdev->login_callout, CALLOUT_MPSAFE);
callout_setfunc(&sdev->login_callout,
sbp_login_callout, sdev);
sdev->status = SBP_DEV_RESET;
new = 1;
snprintf(sdev->bustgtlun, 32, "%s:%d:%d",
device_xname(sc->sc_fd.dev),
sdev->target->target_id,
sdev->lun_id);
if (!sc->sc_lwp)
if (kthread_create(
PRI_NONE, KTHREAD_MPSAFE, NULL,
sbp_scsipi_scan_target, &sc->sc_target,
&sc->sc_lwp,
"sbp%d_attach", device_unit(sc->sc_fd.dev)))
aprint_error_dev(sc->sc_fd.dev,
"unable to create thread");
}
sdev->flags |= VALID_LUN;
sdev->type = (reg->val & 0xff0000) >> 16;

if (new == 0)
goto next;

fwdma_alloc_setup(sc->sc_fd.dev, sc->sc_dmat, SBP_DMA_SIZE,
&sdev->dma, sizeof(uint32_t), BUS_DMA_NOWAIT);
if (sdev->dma.v_addr == NULL) {
free(sdev, M_SBP);
target->luns[lun] = NULL;
goto next;
}
sdev->ocb = (struct sbp_ocb *)sdev->dma.v_addr;
sdev->login = (struct sbp_login_res *)&sdev->ocb[SBP_QUEUE_LEN];
memset((char *)sdev->ocb, 0,
sizeof(struct sbp_ocb) * SBP_QUEUE_LEN);

STAILQ_INIT(&sdev->free_ocbs);
for (i = 0; i < SBP_QUEUE_LEN; i++) {
struct sbp_ocb *ocb = &sdev->ocb[i];

ocb->index = i;
ocb->bus_addr =
sdev->dma.bus_addr + sizeof(struct sbp_ocb) * i;
if (bus_dmamap_create(sc->sc_dmat, 0x100000,
SBP_IND_MAX, SBP_SEG_MAX, 0, 0, &ocb->dmamap)) {
aprint_error_dev(sc->sc_fd.dev,
"cannot create dmamap %d\n", i);
/* XXX */
goto next;
}
sbp_free_ocb(sdev, ocb); /* into free queue */
}
next:
crom_next(&cc);
}

for (lun = 0; lun < target->num_lun; lun++) {
sdev = target->luns[lun];
if (sdev != NULL && (sdev->flags & VALID_LUN) == 0) {
sbp_scsipi_detach_sdev(sdev);
sbp_free_sdev(sdev);
target->luns[lun] = NULL;
}
}
}

static struct sbp_target *
sbp_alloc_target(struct sbp_softc *sc, struct fw_device *fwdev)
{
struct sbp_target *target;
struct crom_context cc;
struct csrreg *reg;

SBP_DEBUG(1)
printf("sbp_alloc_target\n");
END_DEBUG
/* new target */
target = &sc->sc_target;
target->sbp = sc;
target->fwdev = fwdev;
target->target_id = 0;
target->mgm_ocb_cur = NULL;
SBP_DEBUG(1)
printf("target: mgm_port: %x\n", target->mgm_lo);
END_DEBUG
STAILQ_INIT(&target->xferlist);
target->n_xfer = 0;
STAILQ_INIT(&target->mgm_ocb_queue);
callout_init(&target->mgm_ocb_timeout, CALLOUT_MPSAFE);

target->luns = NULL;
target->num_lun = 0;

/* XXX we may want to reload mgm port after each bus reset */
/* XXX there might be multiple management agents */
crom_init_context(&cc, target->fwdev->csrrom);
reg = crom_search_key(&cc, CROM_MGM);
if (reg == NULL || reg->val == 0) {
aprint_error_dev(sc->sc_fd.dev, "NULL management address\n");
target->fwdev = NULL;
return NULL;
}

target->mgm_hi = 0xffff;
target->mgm_lo = 0xf0000000 | (reg->val << 2);

return target;
}

static void
sbp_probe_lun(struct sbp_dev *sdev)
{
struct fw_device *fwdev;
struct crom_context c, *cc = &c;
struct csrreg *reg;

memset(sdev->vendor, 0, sizeof(sdev->vendor));
memset(sdev->product, 0, sizeof(sdev->product));

fwdev = sdev->target->fwdev;
crom_init_context(cc, fwdev->csrrom);
/* get vendor string */
crom_search_key(cc, CSRKEY_VENDOR);
crom_next(cc);
crom_parse_text(cc, sdev->vendor, sizeof(sdev->vendor));
/* skip to the unit directory for SBP-2 */
while ((reg = crom_search_key(cc, CSRKEY_VER)) != NULL) {
if (reg->val == CSRVAL_T10SBP2)
break;
crom_next(cc);
}
/* get firmware revision */
reg = crom_search_key(cc, CSRKEY_FIRM_VER);
if (reg != NULL)
snprintf(sdev->revision, sizeof(sdev->revision), "%06x",
reg->val);
/* get product string */
crom_search_key(cc, CSRKEY_MODEL);
crom_next(cc);
crom_parse_text(cc, sdev->product, sizeof(sdev->product));
}

static void
sbp_login_callout(void *arg)
{
struct sbp_dev *sdev = (struct sbp_dev *)arg;

sbp_mgm_orb(sdev, ORB_FUN_LGI, NULL);
}

static void
sbp_login(struct sbp_dev *sdev)
{
struct sbp_softc *sc = sdev->target->sbp;
struct timeval delta;
struct timeval t;
int ticks = 0;

microtime(&delta);
timersub(&delta, &sc->sc_last_busreset, &delta);
t.tv_sec = login_delay / 1000;
t.tv_usec = (login_delay % 1000) * 1000;
timersub(&t, &delta, &t);
if (t.tv_sec >= 0 && t.tv_usec > 0)
ticks = (t.tv_sec * 1000 + t.tv_usec / 1000) * hz / 1000;
SBP_DEBUG(0)
printf("%s: sec = %lld usec = %ld ticks = %d\n", __func__,
(long long)t.tv_sec, (long)t.tv_usec, ticks);
END_DEBUG
callout_schedule(&sdev->login_callout, ticks);
}

static void
sbp_probe_target(void *arg)
{
struct sbp_target *target = (struct sbp_target *)arg;
struct sbp_dev *sdev;
int i;

SBP_DEBUG(1)
printf("%s %d\n", __func__, target->target_id);
END_DEBUG

sbp_alloc_lun(target);

/* XXX untimeout mgm_ocb and dequeue */
for (i = 0; i < target->num_lun; i++) {
sdev = target->luns[i];
if (sdev == NULL || sdev->status == SBP_DEV_DEAD)
continue;

if (sdev->periph != NULL) {
scsipi_periph_freeze(sdev->periph, 1);
sdev->freeze++;
}
sbp_probe_lun(sdev);
sbp_show_sdev_info(sdev);

sbp_abort_all_ocbs(sdev, XS_RESET);
switch (sdev->status) {
case SBP_DEV_RESET:
/* new or revived target */
if (auto_login)
sbp_login(sdev);
break;
case SBP_DEV_TOATTACH:
case SBP_DEV_PROBE:
case SBP_DEV_ATTACHED:
case SBP_DEV_RETRY:
default:
sbp_mgm_orb(sdev, ORB_FUN_RCN, NULL);
break;
}
}
}

static void
sbp_post_busreset(void *arg)
{
struct sbp_softc *sc = (struct sbp_softc *)arg;
struct sbp_target *target = &sc->sc_target;
struct fw_device *fwdev = target->fwdev;
int alive;

alive = SBP_FWDEV_ALIVE(fwdev);
SBP_DEBUG(0)
printf("sbp_post_busreset\n");
if (!alive)
printf("not alive\n");
END_DEBUG
microtime(&sc->sc_last_busreset);

if (!alive)
return;

scsipi_channel_freeze(&sc->sc_channel, 1);
}

static void
sbp_post_explore(void *arg)
{
struct sbp_softc *sc = (struct sbp_softc *)arg;
struct sbp_target *target = &sc->sc_target;
struct fw_device *fwdev = target->fwdev;
int alive;

alive = SBP_FWDEV_ALIVE(fwdev);
SBP_DEBUG(0)
printf("sbp_post_explore (sbp_cold=%d)\n", sbp_cold);
if (!alive)
printf("not alive\n");
END_DEBUG
if (!alive)
return;

if (!firewire_phydma_enable)
return;

if (sbp_cold > 0)
sbp_cold--;

SBP_DEBUG(0)
printf("sbp_post_explore: EUI:%08x%08x ", fwdev->eui.hi, fwdev->eui.lo);
END_DEBUG
sbp_probe_target((void *)target);
if (target->num_lun == 0)
sbp_free_target(target);

scsipi_channel_thaw(&sc->sc_channel, 1);
}

#if NEED_RESPONSE
static void
sbp_loginres_callback(struct fw_xfer *xfer)
{
struct sbp_dev *sdev = (struct sbp_dev *)xfer->sc;
struct sbp_softc *sc = sdev->target->sbp;

SBP_DEBUG(1)
printf("sbp_loginres_callback\n");
END_DEBUG
/* recycle */
mutex_enter(&sc->sc_fwb.fwb_mtx);
STAILQ_INSERT_TAIL(&sc->sc_fwb.xferlist, xfer, link);
mutex_exit(&sc->sc_fwb.fwb_mtx);
return;
}
#endif

static inline void
sbp_xfer_free(struct fw_xfer *xfer)
{
struct sbp_dev *sdev = (struct sbp_dev *)xfer->sc;
struct sbp_softc *sc = sdev->target->sbp;

fw_xfer_unload(xfer);
mutex_enter(&sc->sc_mtx);
STAILQ_INSERT_TAIL(&sdev->target->xferlist, xfer, link);
mutex_exit(&sc->sc_mtx);
}

static void
sbp_reset_start_callback(struct fw_xfer *xfer)
{
struct sbp_dev *tsdev, *sdev = (struct sbp_dev *)xfer->sc;
struct sbp_target *target = sdev->target;
int i;

if (xfer->resp != 0)
aprint_error("%s: sbp_reset_start failed: resp=%d\n",
sdev->bustgtlun, xfer->resp);

for (i = 0; i < target->num_lun; i++) {
tsdev = target->luns[i];
if (tsdev != NULL && tsdev->status == SBP_DEV_LOGIN)
sbp_login(tsdev);
}
}

static void
sbp_reset_start(struct sbp_dev *sdev)
{
struct fw_xfer *xfer;
struct fw_pkt *fp;

SBP_DEBUG(0)
printf("%s: sbp_reset_start: %s\n",
device_xname(sdev->target->sbp->sc_fd.dev), sdev->bustgtlun);
END_DEBUG

xfer = sbp_write_cmd(sdev, FWTCODE_WREQQ, 0);
if (xfer == NULL)
return;
xfer->hand = sbp_reset_start_callback;
fp = &xfer->send.hdr;
fp->mode.wreqq.dest_hi = 0xffff;
fp->mode.wreqq.dest_lo = 0xf0000000 | RESET_START;
fp->mode.wreqq.data = htonl(0xf);
if (fw_asyreq(xfer->fc, -1, xfer) != 0)
sbp_xfer_free(xfer);
}

static void
sbp_mgm_callback(struct fw_xfer *xfer)
{
struct sbp_dev *sdev;

sdev = (struct sbp_dev *)xfer->sc;

SBP_DEBUG(1)
printf("%s: sbp_mgm_callback: %s\n",
device_xname(sdev->target->sbp->sc_fd.dev), sdev->bustgtlun);
END_DEBUG
sbp_xfer_free(xfer);
return;
}

static void
sbp_scsipi_scan_target(void *arg)
{
struct sbp_target *target = (struct sbp_target *)arg;
struct sbp_softc *sc = target->sbp;
struct sbp_dev *sdev;
struct scsipi_channel *chan = &sc->sc_channel;
struct scsibus_softc *sc_bus = device_private(sc->sc_bus);
int lun, yet;

do {
mutex_enter(&sc->sc_mtx);
cv_wait_sig(&sc->sc_cv, &sc->sc_mtx);
mutex_exit(&sc->sc_mtx);
yet = 0;

for (lun = 0; lun < target->num_lun; lun++) {
sdev = target->luns[lun];
if (sdev == NULL)
continue;
if (sdev->status != SBP_DEV_PROBE) {
yet++;
continue;
}

if (sdev->periph == NULL) {
if (chan->chan_nluns < target->num_lun)
chan->chan_nluns = target->num_lun;

scsi_probe_bus(sc_bus, target->target_id,
sdev->lun_id);
sdev->periph = scsipi_lookup_periph(chan,
target->target_id, lun);
}
sdev->status = SBP_DEV_ATTACHED;
}
} while (yet > 0);

sc->sc_lwp = NULL;
kthread_exit(0);

/* NOTREACHED */
}

static inline void
sbp_scan_dev(struct sbp_dev *sdev)
{
struct sbp_softc *sc = sdev->target->sbp;

sdev->status = SBP_DEV_PROBE;
mutex_enter(&sc->sc_mtx);
cv_signal(&sdev->target->sbp->sc_cv);
mutex_exit(&sc->sc_mtx);
}

static void
sbp_do_attach(struct fw_xfer *xfer)
{
struct sbp_dev *sdev;
struct sbp_target *target;
struct sbp_softc *sc;

sdev = (struct sbp_dev *)xfer->sc;
target = sdev->target;
sc = target->sbp;

SBP_DEBUG(0)
printf("%s:%s:%s\n", device_xname(sc->sc_fd.dev), __func__,
sdev->bustgtlun);
END_DEBUG
sbp_xfer_free(xfer);

sbp_scan_dev(sdev);
return;
}

static void
sbp_agent_reset_callback(struct fw_xfer *xfer)
{
struct sbp_dev *sdev = (struct sbp_dev *)xfer->sc;
struct sbp_softc *sc = sdev->target->sbp;

SBP_DEBUG(1)
printf("%s:%s:%s\n", device_xname(sc->sc_fd.dev), __func__,
sdev->bustgtlun);
END_DEBUG
if (xfer->resp != 0)
aprint_error_dev(sc->sc_fd.dev, "%s:%s: resp=%d\n", __func__,
sdev->bustgtlun, xfer->resp);

sbp_xfer_free(xfer);
if (sdev->periph != NULL) {
scsipi_periph_thaw(sdev->periph, sdev->freeze);
scsipi_channel_thaw(&sc->sc_channel, 0);
sdev->freeze = 0;
}
}

static void
sbp_agent_reset(struct sbp_dev *sdev)
{
struct fw_xfer *xfer;
struct fw_pkt *fp;

SBP_DEBUG(0)
printf("%s:%s:%s\n", device_xname(sdev->target->sbp->sc_fd.dev),
__func__, sdev->bustgtlun);
END_DEBUG
xfer = sbp_write_cmd(sdev, FWTCODE_WREQQ, 0x04);
if (xfer == NULL)
return;
if (sdev->status == SBP_DEV_ATTACHED || sdev->status == SBP_DEV_PROBE)
xfer->hand = sbp_agent_reset_callback;
else
xfer->hand = sbp_do_attach;
fp = &xfer->send.hdr;
fp->mode.wreqq.data = htonl(0xf);
if (fw_asyreq(xfer->fc, -1, xfer) != 0)
sbp_xfer_free(xfer);
sbp_abort_all_ocbs(sdev, XS_RESET);
}

static void
sbp_busy_timeout_callback(struct fw_xfer *xfer)
{
struct sbp_dev *sdev = (struct sbp_dev *)xfer->sc;

SBP_DEBUG(1)
printf("%s:%s:%s\n", device_xname(sdev->target->sbp->sc_fd.dev),
__func__, sdev->bustgtlun);
END_DEBUG
sbp_xfer_free(xfer);
sbp_agent_reset(sdev);
}

static void
sbp_busy_timeout(struct sbp_dev *sdev)
{
struct fw_pkt *fp;
struct fw_xfer *xfer;

SBP_DEBUG(0)
printf("%s:%s:%s\n", device_xname(sdev->target->sbp->sc_fd.dev),
__func__, sdev->bustgtlun);
END_DEBUG
xfer = sbp_write_cmd(sdev, FWTCODE_WREQQ, 0);
if (xfer == NULL)
return;
xfer->hand = sbp_busy_timeout_callback;
fp = &xfer->send.hdr;
fp->mode.wreqq.dest_hi = 0xffff;
fp->mode.wreqq.dest_lo = 0xf0000000 | BUSY_TIMEOUT;
fp->mode.wreqq.data = htonl((1 << (13+12)) | 0xf);
if (fw_asyreq(xfer->fc, -1, xfer) != 0)
sbp_xfer_free(xfer);
}

static void
sbp_orb_pointer_callback(struct fw_xfer *xfer)
{
struct sbp_dev *sdev = (struct sbp_dev *)xfer->sc;
struct sbp_softc *sc = sdev->target->sbp;

SBP_DEBUG(1)
printf("%s:%s:%s\n", device_xname(sc->sc_fd.dev), __func__,
sdev->bustgtlun);
END_DEBUG
if (xfer->resp != 0)
aprint_error_dev(sc->sc_fd.dev, "%s:%s: xfer->resp = %d\n",
__func__, sdev->bustgtlun, xfer->resp);
sbp_xfer_free(xfer);
sdev->flags &= ~ORB_POINTER_ACTIVE;

if ((sdev->flags & ORB_POINTER_NEED) != 0) {
struct sbp_ocb *ocb;

sdev->flags &= ~ORB_POINTER_NEED;
ocb = STAILQ_FIRST(&sdev->ocbs);
if (ocb != NULL)
sbp_orb_pointer(sdev, ocb);
}
return;
}

static void
sbp_orb_pointer(struct sbp_dev *sdev, struct sbp_ocb *ocb)
{
struct sbp_softc *sc = sdev->target->sbp;
struct fw_xfer *xfer;
struct fw_pkt *fp;

SBP_DEBUG(1)
printf("%s:%s:%s: 0x%08x\n", device_xname(sc->sc_fd.dev), __func__,
sdev->bustgtlun, (uint32_t)ocb->bus_addr);
END_DEBUG

if ((sdev->flags & ORB_POINTER_ACTIVE) != 0) {
SBP_DEBUG(0)
printf("%s: orb pointer active\n", __func__);
END_DEBUG
sdev->flags |= ORB_POINTER_NEED;
return;
}

sdev->flags |= ORB_POINTER_ACTIVE;
xfer = sbp_write_cmd(sdev, FWTCODE_WREQB, 0x08);
if (xfer == NULL)
return;
xfer->hand = sbp_orb_pointer_callback;

fp = &xfer->send.hdr;
fp->mode.wreqb.len = 8;
fp->mode.wreqb.extcode = 0;
xfer->send.payload[0] =
htonl(((sc->sc_fd.fc->nodeid | FWLOCALBUS) << 16));
xfer->send.payload[1] = htonl((uint32_t)ocb->bus_addr);

if (fw_asyreq(xfer->fc, -1, xfer) != 0) {
sbp_xfer_free(xfer);
ocb->xs->error = XS_DRIVER_STUFFUP;
scsipi_done(ocb->xs);
}
}

static void
sbp_doorbell_callback(struct fw_xfer *xfer)
{
struct sbp_dev *sdev = (struct sbp_dev *)xfer->sc;
struct sbp_softc *sc = sdev->target->sbp;

SBP_DEBUG(1)
printf("%s:%s:%s\n", device_xname(sc->sc_fd.dev), __func__,
sdev->bustgtlun);
END_DEBUG
if (xfer->resp != 0) {
aprint_error_dev(sc->sc_fd.dev, "%s: xfer->resp = %d\n",
__func__, xfer->resp);
}
sbp_xfer_free(xfer);
sdev->flags &= ~ORB_DOORBELL_ACTIVE;
if ((sdev->flags & ORB_DOORBELL_NEED) != 0) {
sdev->flags &= ~ORB_DOORBELL_NEED;
sbp_doorbell(sdev);
}
return;
}

static void
sbp_doorbell(struct sbp_dev *sdev)
{
struct fw_xfer *xfer;
struct fw_pkt *fp;

SBP_DEBUG(1)
printf("%s:%s:%s\n", device_xname(sdev->target->sbp->sc_fd.dev),
__func__, sdev->bustgtlun);
END_DEBUG

if ((sdev->flags & ORB_DOORBELL_ACTIVE) != 0) {
sdev->flags |= ORB_DOORBELL_NEED;
return;
}
sdev->flags |= ORB_DOORBELL_ACTIVE;
xfer = sbp_write_cmd(sdev, FWTCODE_WREQQ, 0x10);
if (xfer == NULL)
return;
xfer->hand = sbp_doorbell_callback;
fp = &xfer->send.hdr;
fp->mode.wreqq.data = htonl(0xf);
if (fw_asyreq(xfer->fc, -1, xfer) != 0)
sbp_xfer_free(xfer);
}

static struct fw_xfer *
sbp_write_cmd(struct sbp_dev *sdev, int tcode, int offset)
{
struct sbp_softc *sc;
struct fw_xfer *xfer;
struct fw_pkt *fp;
struct sbp_target *target;
int new = 0;

target = sdev->target;
sc = target->sbp;
mutex_enter(&sc->sc_mtx);
xfer = STAILQ_FIRST(&target->xferlist);
if (xfer == NULL) {
if (target->n_xfer > 5 /* XXX */) {
aprint_error_dev(sc->sc_fd.dev,
"no more xfer for this target\n");
mutex_exit(&sc->sc_mtx);
return NULL;
}
xfer = fw_xfer_alloc_buf(M_SBP, 8, 0);
if (xfer == NULL) {
aprint_error_dev(sc->sc_fd.dev,
"fw_xfer_alloc_buf failed\n");
mutex_exit(&sc->sc_mtx);
return NULL;
}
target->n_xfer++;
SBP_DEBUG(0)
printf("sbp: alloc %d xfer\n", target->n_xfer);
END_DEBUG
new = 1;
} else
STAILQ_REMOVE_HEAD(&target->xferlist, link);
mutex_exit(&sc->sc_mtx);

microtime(&xfer->tv);

if (new) {
xfer->recv.pay_len = 0;
xfer->send.spd = uimin(target->fwdev->speed, max_speed);
xfer->fc = target->sbp->sc_fd.fc;
}

if (tcode == FWTCODE_WREQB)
xfer->send.pay_len = 8;
else
xfer->send.pay_len = 0;

xfer->sc = (void *)sdev;
fp = &xfer->send.hdr;
fp->mode.wreqq.dest_hi = sdev->login->cmd_hi;
fp->mode.wreqq.dest_lo = sdev->login->cmd_lo + offset;
fp->mode.wreqq.tlrt = 0;
fp->mode.wreqq.tcode = tcode;
fp->mode.wreqq.pri = 0;
fp->mode.wreqq.dst = FWLOCALBUS | target->fwdev->dst;

return xfer;
}

static void
sbp_mgm_orb(struct sbp_dev *sdev, int func, struct sbp_ocb *aocb)
{
struct fw_xfer *xfer;
struct fw_pkt *fp;
struct sbp_ocb *ocb;
struct sbp_target *target;
int nid, dv_unit;

target = sdev->target;
nid = target->sbp->sc_fd.fc->nodeid | FWLOCALBUS;
dv_unit = device_unit(target->sbp->sc_fd.dev);

mutex_enter(&target->sbp->sc_mtx);
if (func == ORB_FUN_RUNQUEUE) {
ocb = STAILQ_FIRST(&target->mgm_ocb_queue);
if (target->mgm_ocb_cur != NULL || ocb == NULL) {
mutex_exit(&target->sbp->sc_mtx);
return;
}
STAILQ_REMOVE_HEAD(&target->mgm_ocb_queue, ocb);
mutex_exit(&target->sbp->sc_mtx);
goto start;
}
if ((ocb = sbp_get_ocb(sdev)) == NULL) {
mutex_exit(&target->sbp->sc_mtx);
/* XXX */
return;
}
mutex_exit(&target->sbp->sc_mtx);
ocb->flags = OCB_ACT_MGM;
ocb->sdev = sdev;

memset(ocb->orb, 0, sizeof(ocb->orb));
ocb->orb[6] = htonl((nid << 16) | SBP_BIND_HI);
ocb->orb[7] = htonl(SBP_DEV2ADDR(dv_unit, sdev->lun_id));

SBP_DEBUG(0)
printf("%s:%s:%s: %s\n", device_xname(sdev->target->sbp->sc_fd.dev),
__func__, sdev->bustgtlun, orb_fun_name[(func>>16)&0xf]);
END_DEBUG
switch (func) {
case ORB_FUN_LGI:
{
const off_t sbp_login_off =
sizeof(struct sbp_ocb) * SBP_QUEUE_LEN;

ocb->orb[0] = ocb->orb[1] = 0; /* password */
ocb->orb[2] = htonl(nid << 16);
ocb->orb[3] = htonl(sdev->dma.bus_addr + sbp_login_off);
ocb->orb[4] = htonl(ORB_NOTIFY | sdev->lun_id);
if (ex_login)
ocb->orb[4] |= htonl(ORB_EXV);
ocb->orb[5] = htonl(SBP_LOGIN_SIZE);
bus_dmamap_sync(sdev->dma.dma_tag, sdev->dma.dma_map,
sbp_login_off, SBP_LOGIN_SIZE, BUS_DMASYNC_PREREAD);
break;
}

case ORB_FUN_ATA:
ocb->orb[0] = htonl((0 << 16) | 0);
ocb->orb[1] = htonl(aocb->bus_addr & 0xffffffff);
/* fall through */
case ORB_FUN_RCN:
case ORB_FUN_LGO:
case ORB_FUN_LUR:
case ORB_FUN_RST:
case ORB_FUN_ATS:
ocb->orb[4] = htonl(ORB_NOTIFY | func | sdev->login->id);
break;
}

if (target->mgm_ocb_cur != NULL) {
/* there is a standing ORB */
mutex_enter(&target->sbp->sc_mtx);
STAILQ_INSERT_TAIL(&sdev->target->mgm_ocb_queue, ocb, ocb);
mutex_exit(&target->sbp->sc_mtx);
return;
}
start:
target->mgm_ocb_cur = ocb;

callout_reset(&target->mgm_ocb_timeout, 5 * hz, sbp_mgm_timeout, ocb);
xfer = sbp_write_cmd(sdev, FWTCODE_WREQB, 0);
if (xfer == NULL)
return;
xfer->hand = sbp_mgm_callback;

fp = &xfer->send.hdr;
fp->mode.wreqb.dest_hi = sdev->target->mgm_hi;
fp->mode.wreqb.dest_lo = sdev->target->mgm_lo;
fp->mode.wreqb.len = 8;
fp->mode.wreqb.extcode = 0;
xfer->send.payload[0] = htonl(nid << 16);
xfer->send.payload[1] = htonl(ocb->bus_addr & 0xffffffff);

/* cache writeback & invalidate(required ORB_FUN_LGI func) */
/* when abort_ocb, should sync POST ope ? */
SBP_ORB_DMA_SYNC(sdev->dma, ocb->index, BUS_DMASYNC_PREWRITE);
if (fw_asyreq(xfer->fc, -1, xfer) != 0)
sbp_xfer_free(xfer);
}

static void
sbp_print_scsi_cmd(struct sbp_ocb *ocb)
{
struct scsipi_xfer *xs = ocb->xs;

printf("%s:%d:%d:"
" cmd: %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x,"
" flags: 0x%02x, %db cmd/%db data\n",
device_xname(ocb->sdev->target->sbp->sc_fd.dev),
xs->xs_periph->periph_target,
xs->xs_periph->periph_lun,
xs->cmd->opcode,
xs->cmd->bytes[0], xs->cmd->bytes[1],
xs->cmd->bytes[2], xs->cmd->bytes[3],
xs->cmd->bytes[4], xs->cmd->bytes[5],
xs->cmd->bytes[6], xs->cmd->bytes[7],
xs->cmd->bytes[8],
xs->xs_control & (XS_CTL_DATA_IN | XS_CTL_DATA_OUT),
xs->cmdlen, xs->datalen);
}

static void
sbp_scsi_status(struct sbp_status *sbp_status, struct sbp_ocb *ocb)
{
struct sbp_cmd_status *sbp_cmd_status;
struct scsi_sense_data *sense = &ocb->xs->sense.scsi_sense;

sbp_cmd_status = (struct sbp_cmd_status *)sbp_status->data;

SBP_DEBUG(0)
sbp_print_scsi_cmd(ocb);
/* XXX need decode status */
printf("%s:"
" SCSI status %x sfmt %x valid %x key %x code %x qlfr %x len %d\n",
ocb->sdev->bustgtlun,
sbp_cmd_status->status,
sbp_cmd_status->sfmt,
sbp_cmd_status->valid,
sbp_cmd_status->s_key,
sbp_cmd_status->s_code,
sbp_cmd_status->s_qlfr,
sbp_status->len);
END_DEBUG

switch (sbp_cmd_status->status) {
case SCSI_CHECK:
case SCSI_BUSY:
case SCSI_TERMINATED:
if (sbp_cmd_status->sfmt == SBP_SFMT_CURR)
sense->response_code = SSD_RCODE_CURRENT;
else
sense->response_code = SSD_RCODE_DEFERRED;
if (sbp_cmd_status->valid)
sense->response_code |= SSD_RCODE_VALID;
sense->flags = sbp_cmd_status->s_key;
if (sbp_cmd_status->mark)
sense->flags |= SSD_FILEMARK;
if (sbp_cmd_status->eom)
sense->flags |= SSD_EOM;
if (sbp_cmd_status->ill_len)
sense->flags |= SSD_ILI;

memcpy(sense->info, &sbp_cmd_status->info, 4);

if (sbp_status->len <= 1)
/* XXX not scsi status. shouldn't be happened */
sense->extra_len = 0;
else if (sbp_status->len <= 4)
/* add_sense_code(_qual), info, cmd_spec_info */
sense->extra_len = 6;
else
/* fru, sense_key_spec */
sense->extra_len = 10;

memcpy(sense->csi, &sbp_cmd_status->cdb, 4);

sense->asc = sbp_cmd_status->s_code;
sense->ascq = sbp_cmd_status->s_qlfr;
sense->fru = sbp_cmd_status->fru;

memcpy(sense->sks.sks_bytes, sbp_cmd_status->s_keydep, 3);
ocb->xs->error = XS_SENSE;
ocb->xs->xs_status = sbp_cmd_status->status;
/*
{
uint8_t j, *tmp;
tmp = sense;
for (j = 0; j < 32; j += 8)
aprint_normal(
"sense %02x%02x %02x%02x %02x%02x %02x%02x\n",
tmp[j], tmp[j+1], tmp[j+2], tmp[j+3],
tmp[j+4], tmp[j+5], tmp[j+6], tmp[j+7]);

}
*/
break;
default:
aprint_error_dev(ocb->sdev->target->sbp->sc_fd.dev,
"%s:%s: unknown scsi status 0x%x\n",
__func__, ocb->sdev->bustgtlun, sbp_cmd_status->status);
}
}

static void
sbp_fix_inq_data(struct sbp_ocb *ocb)
{
struct scsipi_xfer *xs = ocb->xs;
struct sbp_dev *sdev;
struct scsipi_inquiry_data *inq =
(struct scsipi_inquiry_data *)xs->data;

sdev = ocb->sdev;

#if 0
/*
* NetBSD is assuming always 0 for EVPD-bit and 'Page Code'.
*/
#define SI_EVPD 0x01
if (xs->cmd->bytes[0] & SI_EVPD)
return;
#endif
SBP_DEBUG(1)
printf("%s:%s:%s\n", device_xname(sdev->target->sbp->sc_fd.dev),
__func__, sdev->bustgtlun);
END_DEBUG
switch (inq->device & SID_TYPE) {
case T_DIRECT:
#if 0
/*
* XXX Convert Direct Access device to RBC.
* I've never seen FireWire DA devices which support READ_6.
*/
if ((inq->device & SID_TYPE) == T_DIRECT)
inq->device |= T_SIMPLE_DIRECT; /* T_DIRECT == 0 */
#endif
/* FALLTHROUGH */

case T_SIMPLE_DIRECT:
/*
* Override vendor/product/revision information.
* Some devices sometimes return strange strings.
*/
#if 1
memcpy(inq->vendor, sdev->vendor, sizeof(inq->vendor));
memcpy(inq->product, sdev->product, sizeof(inq->product));
memcpy(inq->revision + 2, sdev->revision,
sizeof(inq->revision));
#endif
break;
}
/*
* Force to enable/disable tagged queuing.
* XXX CAM also checks SCP_QUEUE_DQUE flag in the control mode page.
*/
if (sbp_tags > 0)
inq->flags3 |= SID_CmdQue;
else if (sbp_tags < 0)
inq->flags3 &= ~SID_CmdQue;

}

static void
sbp_recv(struct fw_xfer *xfer)
{
struct fw_pkt *rfp;
#if NEED_RESPONSE
struct fw_pkt *sfp;
#endif
struct sbp_softc *sc;
struct sbp_dev *sdev;
struct sbp_ocb *ocb;
struct sbp_login_res *login_res = NULL;
struct sbp_status *sbp_status;
struct sbp_target *target;
int orb_fun, status_valid0, status_valid, l, reset_agent = 0;
uint32_t addr;
/*
uint32_t *ld;
ld = xfer->recv.buf;
printf("sbp %x %d %d %08x %08x %08x %08x\n",
xfer->resp, xfer->recv.len, xfer->recv.off, ntohl(ld[0]), ntohl(ld[1]), ntohl(ld[2]), ntohl(ld[3]));
printf("sbp %08x %08x %08x %08x\n", ntohl(ld[4]), ntohl(ld[5]), ntohl(ld[6]), ntohl(ld[7]));
printf("sbp %08x %08x %08x %08x\n", ntohl(ld[8]), ntohl(ld[9]), ntohl(ld[10]), ntohl(ld[11]));
*/

sc = (struct sbp_softc *)xfer->sc;
if (xfer->resp != 0) {
aprint_error_dev(sc->sc_fd.dev,
"sbp_recv: xfer->resp = %d\n", xfer->resp);
goto done0;
}
if (xfer->recv.payload == NULL) {
aprint_error_dev(sc->sc_fd.dev,
"sbp_recv: xfer->recv.payload == NULL\n");
goto done0;
}
rfp = &xfer->recv.hdr;
if (rfp->mode.wreqb.tcode != FWTCODE_WREQB) {
aprint_error_dev(sc->sc_fd.dev,
"sbp_recv: tcode = %d\n", rfp->mode.wreqb.tcode);
goto done0;
}
sbp_status = (struct sbp_status *)xfer->recv.payload;
addr = rfp->mode.wreqb.dest_lo;
SBP_DEBUG(2)
printf("received address 0x%x\n", addr);
END_DEBUG
target = &sc->sc_target;
l = SBP_ADDR2LUN(addr);
if (l >= target->num_lun || target->luns[l] == NULL) {
aprint_error_dev(sc->sc_fd.dev,
"sbp_recv1: invalid lun %d (target=%d)\n",
l, target->target_id);
goto done0;
}
sdev = target->luns[l];

ocb = NULL;
switch (sbp_status->src) {
case SRC_NEXT_EXISTS:
case SRC_NO_NEXT:
/* check mgm_ocb_cur first */
ocb = target->mgm_ocb_cur;
if (ocb != NULL)
if (OCB_MATCH(ocb, sbp_status)) {
callout_stop(&target->mgm_ocb_timeout);
target->mgm_ocb_cur = NULL;
break;
}
ocb = sbp_dequeue_ocb(sdev, sbp_status);
if (ocb == NULL)
aprint_error_dev(sc->sc_fd.dev,
"%s:%s: No ocb(%x) on the queue\n", __func__,
sdev->bustgtlun, ntohl(sbp_status->orb_lo));
break;
case SRC_UNSOL:
/* unsolicit */
aprint_error_dev(sc->sc_fd.dev,
"%s:%s: unsolicit status received\n",
__func__, sdev->bustgtlun);
break;
default:
aprint_error_dev(sc->sc_fd.dev,
"%s:%s: unknown sbp_status->src\n",
__func__, sdev->bustgtlun);
}

status_valid0 = (sbp_status->src < 2
&& sbp_status->resp == SBP_REQ_CMP
&& sbp_status->dead == 0);
status_valid = (status_valid0 && sbp_status->status == 0);

if (!status_valid0 || debug > 2) {
int status;
SBP_DEBUG(0)
printf("%s:%s:%s: ORB status src:%x resp:%x dead:%x"
" len:%x stat:%x orb:%x%08x\n",
device_xname(sc->sc_fd.dev), __func__, sdev->bustgtlun,
sbp_status->src, sbp_status->resp, sbp_status->dead,
sbp_status->len, sbp_status->status,
ntohs(sbp_status->orb_hi), ntohl(sbp_status->orb_lo));
END_DEBUG
printf("%s:%s\n", device_xname(sc->sc_fd.dev), sdev->bustgtlun);
status = sbp_status->status;
switch (sbp_status->resp) {
case SBP_REQ_CMP:
if (status > MAX_ORB_STATUS0)
printf("%s\n", orb_status0[MAX_ORB_STATUS0]);
else
printf("%s\n", orb_status0[status]);
break;
case SBP_TRANS_FAIL:
printf("Obj: %s, Error: %s\n",
orb_status1_object[(status>>6) & 3],
orb_status1_serial_bus_error[status & 0xf]);
break;
case SBP_ILLE_REQ:
printf("Illegal request\n");
break;
case SBP_VEND_DEP:
printf("Vendor dependent\n");
break;
default:
printf("unknown respose code %d\n", sbp_status->resp);
}
}

/* we have to reset the fetch agent if it's dead */
if (sbp_status->dead) {
if (sdev->periph != NULL) {
scsipi_periph_freeze(sdev->periph, 1);
sdev->freeze++;
}
reset_agent = 1;
}

if (ocb == NULL)
goto done;

switch (ntohl(ocb->orb[4]) & ORB_FMT_MSK) {
case ORB_FMT_NOP:
break;
case ORB_FMT_VED:
break;
case ORB_FMT_STD:
switch (ocb->flags) {
case OCB_ACT_MGM:
orb_fun = ntohl(ocb->orb[4]) & ORB_FUN_MSK;
reset_agent = 0;
switch (orb_fun) {
case ORB_FUN_LGI:
{
const struct fwdma_alloc *dma = &sdev->dma;
const off_t sbp_login_off =
sizeof(struct sbp_ocb) * SBP_QUEUE_LEN;

bus_dmamap_sync(dma->dma_tag, dma->dma_map,
sbp_login_off, SBP_LOGIN_SIZE,
BUS_DMASYNC_POSTREAD);
login_res = sdev->login;
login_res->len = ntohs(login_res->len);
login_res->id = ntohs(login_res->id);
login_res->cmd_hi = ntohs(login_res->cmd_hi);
login_res->cmd_lo = ntohl(login_res->cmd_lo);
if (status_valid) {
SBP_DEBUG(0)
printf("%s:%s:%s: login:"
" len %d, ID %d, cmd %08x%08x,"
" recon_hold %d\n",
device_xname(sc->sc_fd.dev),
__func__, sdev->bustgtlun,
login_res->len, login_res->id,
login_res->cmd_hi,
login_res->cmd_lo,
ntohs(login_res->recon_hold));
END_DEBUG
sbp_busy_timeout(sdev);
} else {
/* forgot logout? */
aprint_error_dev(sc->sc_fd.dev,
"%s:%s: login failed\n",
__func__, sdev->bustgtlun);
sdev->status = SBP_DEV_RESET;
}
break;
}
case ORB_FUN_RCN:
login_res = sdev->login;
if (status_valid) {
SBP_DEBUG(0)
printf("%s:%s:%s: reconnect:"
" len %d, ID %d, cmd %08x%08x\n",
device_xname(sc->sc_fd.dev),
__func__, sdev->bustgtlun,
login_res->len, login_res->id,
login_res->cmd_hi,
login_res->cmd_lo);
END_DEBUG
sbp_agent_reset(sdev);
} else {
/* reconnection hold time exceed? */
SBP_DEBUG(0)
aprint_error_dev(sc->sc_fd.dev,
"%s:%s: reconnect failed\n",
__func__, sdev->bustgtlun);
END_DEBUG
sbp_login(sdev);
}
break;
case ORB_FUN_LGO:
sdev->status = SBP_DEV_RESET;
break;
case ORB_FUN_RST:
sbp_busy_timeout(sdev);
break;
case ORB_FUN_LUR:
case ORB_FUN_ATA:
case ORB_FUN_ATS:
sbp_agent_reset(sdev);
break;
default:
aprint_error_dev(sc->sc_fd.dev,
"%s:%s: unknown function %d\n",
__func__, sdev->bustgtlun, orb_fun);
break;
}
sbp_mgm_orb(sdev, ORB_FUN_RUNQUEUE, NULL);
break;
case OCB_ACT_CMD:
sdev->timeout = 0;
if (ocb->xs != NULL) {
struct scsipi_xfer *xs = ocb->xs;

if (sbp_status->len > 1)
sbp_scsi_status(sbp_status, ocb);
else
if (sbp_status->resp != SBP_REQ_CMP)
xs->error = XS_DRIVER_STUFFUP;
else {
xs->error = XS_NOERROR;
xs->resid = 0;
}
/* fix up inq data */
if (xs->cmd->opcode == INQUIRY)
sbp_fix_inq_data(ocb);
scsipi_done(xs);
}
break;
default:
break;
}
}

if (!use_doorbell)
sbp_free_ocb(sdev, ocb);
done:
if (reset_agent)
sbp_agent_reset(sdev);

done0:
xfer->recv.pay_len = SBP_RECV_LEN;
/* The received packet is usually small enough to be stored within
* the buffer. In that case, the controller return ack_complete and
* no respose is necessary.
*
* XXX fwohci.c and firewire.c should inform event_code such as
* ack_complete or ack_pending to upper driver.
*/
#if NEED_RESPONSE
xfer->send.off = 0;
sfp = (struct fw_pkt *)xfer->send.buf;
sfp->mode.wres.dst = rfp->mode.wreqb.src;
xfer->dst = sfp->mode.wres.dst;
xfer->spd = uimin(sdev->target->fwdev->speed, max_speed);
xfer->hand = sbp_loginres_callback;

sfp->mode.wres.tlrt = rfp->mode.wreqb.tlrt;
sfp->mode.wres.tcode = FWTCODE_WRES;
sfp->mode.wres.rtcode = 0;
sfp->mode.wres.pri = 0;

if (fw_asyreq(xfer->fc, -1, xfer) != 0) {
aprint_error_dev(sc->sc_fd.dev, "mgm_orb failed\n");
mutex_enter(&sc->sc_fwb.fwb_mtx);
STAILQ_INSERT_TAIL(&sc->sc_fwb.xferlist, xfer, link);
mutex_exit(&sc->sc_fwb.fwb_mtx);
}
#else
/* recycle */
mutex_enter(&sc->sc_fwb.fwb_mtx);
STAILQ_INSERT_TAIL(&sc->sc_fwb.xferlist, xfer, link);
mutex_exit(&sc->sc_fwb.fwb_mtx);
#endif

return;

}

static int
sbp_logout_all(struct sbp_softc *sbp)
{
struct sbp_target *target;
struct sbp_dev *sdev;
int i;

SBP_DEBUG(0)
printf("sbp_logout_all\n");
END_DEBUG
target = &sbp->sc_target;
if (target->luns != NULL) {
for (i = 0; i < target->num_lun; i++) {
sdev = target->luns[i];
if (sdev == NULL)
continue;
callout_stop(&sdev->login_callout);
if (sdev->status >= SBP_DEV_TOATTACH &&
sdev->status <= SBP_DEV_ATTACHED)
sbp_mgm_orb(sdev, ORB_FUN_LGO, NULL);
}
}

return 0;
}

static void
sbp_free_sdev(struct sbp_dev *sdev)
{
struct sbp_softc *sc = sdev->target->sbp;
int i;

if (sdev == NULL)
return;
for (i = 0; i < SBP_QUEUE_LEN; i++)
bus_dmamap_destroy(sc->sc_dmat, sdev->ocb[i].dmamap);
fwdma_free(sdev->dma.dma_tag, sdev->dma.dma_map, sdev->dma.v_addr);
free(sdev, M_SBP);
}

static void
sbp_free_target(struct sbp_target *target)
{
struct fw_xfer *xfer, *next;
int i;

if (target->luns == NULL)
return;
callout_stop(&target->mgm_ocb_timeout);
for (i = 0; i < target->num_lun; i++)
sbp_free_sdev(target->luns[i]);

for (xfer = STAILQ_FIRST(&target->xferlist);
xfer != NULL; xfer = next) {
next = STAILQ_NEXT(xfer, link);
fw_xfer_free_buf(xfer);
}
STAILQ_INIT(&target->xferlist);
free(target->luns, M_SBP);
target->num_lun = 0;
target->luns = NULL;
target->fwdev = NULL;
}

static void
sbp_scsipi_detach_sdev(struct sbp_dev *sdev)
{
struct sbp_target *target;
struct sbp_softc *sbp;

if (sdev == NULL)
return;

target = sdev->target;
if (target == NULL)
return;

sbp = target->sbp;

if (sdev->status == SBP_DEV_DEAD)
return;
if (sdev->status == SBP_DEV_RESET)
return;
if (sdev->periph != NULL) {
scsipi_periph_thaw(sdev->periph, sdev->freeze);
scsipi_channel_thaw(&sbp->sc_channel, 0); /* XXXX */
sdev->freeze = 0;
if (scsipi_target_detach(&sbp->sc_channel,
target->target_id, sdev->lun_id, DETACH_FORCE) != 0) {
aprint_error_dev(sbp->sc_fd.dev, "detach failed\n");
}
sdev->periph = NULL;
}
sbp_abort_all_ocbs(sdev, XS_DRIVER_STUFFUP);
}

static void
sbp_scsipi_detach_target(struct sbp_target *target)
{
struct sbp_softc *sbp = target->sbp;
int i;

if (target->luns != NULL) {
SBP_DEBUG(0)
printf("sbp_detach_target %d\n", target->target_id);
END_DEBUG
for (i = 0; i < target->num_lun; i++)
sbp_scsipi_detach_sdev(target->luns[i]);
if (config_detach(sbp->sc_bus, DETACH_FORCE) != 0)
aprint_error_dev(sbp->sc_fd.dev, "%d detach failed\n",
target->target_id);
sbp->sc_bus = NULL;
}
}

static void
sbp_target_reset(struct sbp_dev *sdev, int method)
{
struct sbp_target *target = sdev->target;
struct sbp_dev *tsdev;
int i;

for (i = 0; i < target->num_lun; i++) {
tsdev = target->luns[i];
if (tsdev == NULL)
continue;
if (tsdev->status == SBP_DEV_DEAD)
continue;
if (tsdev->status == SBP_DEV_RESET)
continue;
if (sdev->periph != NULL) {
scsipi_periph_freeze(tsdev->periph, 1);
tsdev->freeze++;
}
sbp_abort_all_ocbs(tsdev, XS_TIMEOUT);
if (method == 2)
tsdev->status = SBP_DEV_LOGIN;
}
switch (method) {
case 1:
aprint_error("target reset\n");
sbp_mgm_orb(sdev, ORB_FUN_RST, NULL);
break;
case 2:
aprint_error("reset start\n");
sbp_reset_start(sdev);
break;
}
}

static void
sbp_mgm_timeout(void *arg)
{
struct sbp_ocb *ocb = (struct sbp_ocb *)arg;
struct sbp_dev *sdev = ocb->sdev;
struct sbp_target *target = sdev->target;

aprint_error_dev(sdev->target->sbp->sc_fd.dev,
"%s:%s: request timeout(mgm orb:0x%08x) ... ",
__func__, sdev->bustgtlun, (uint32_t)ocb->bus_addr);
target->mgm_ocb_cur = NULL;
sbp_free_ocb(sdev, ocb);
#if 0
/* XXX */
aprint_error("run next request\n");
sbp_mgm_orb(sdev, ORB_FUN_RUNQUEUE, NULL);
#endif
aprint_error_dev(sdev->target->sbp->sc_fd.dev,
"%s:%s: reset start\n", __func__, sdev->bustgtlun);
sbp_reset_start(sdev);
}

static void
sbp_timeout(void *arg)
{
struct sbp_ocb *ocb = (struct sbp_ocb *)arg;
struct sbp_dev *sdev = ocb->sdev;

aprint_error_dev(sdev->target->sbp->sc_fd.dev,
"%s:%s: request timeout(cmd orb:0x%08x) ... ",
__func__, sdev->bustgtlun, (uint32_t)ocb->bus_addr);

sdev->timeout++;
switch (sdev->timeout) {
case 1:
aprint_error("agent reset\n");
if (sdev->periph != NULL) {
scsipi_periph_freeze(sdev->periph, 1);
sdev->freeze++;
}
sbp_abort_all_ocbs(sdev, XS_TIMEOUT);
sbp_agent_reset(sdev);
break;
case 2:
case 3:
sbp_target_reset(sdev, sdev->timeout - 1);
break;
default:
aprint_error("\n");
#if 0
/* XXX give up */
sbp_scsipi_detach_target(target);
if (target->luns != NULL)
free(target->luns, M_SBP);
target->num_lun = 0;
target->luns = NULL;
target->fwdev = NULL;
#endif
}
}

static void
sbp_action1(struct sbp_softc *sc, struct scsipi_xfer *xs)
{
struct sbp_target *target = &sc->sc_target;
struct sbp_dev *sdev = NULL;
struct sbp_ocb *ocb;
int speed, flag, error;
void *cdb;

/* target:lun -> sdev mapping */
if (target->fwdev != NULL &&
xs->xs_periph->periph_lun < target->num_lun) {
sdev = target->luns[xs->xs_periph->periph_lun];
if (sdev != NULL && sdev->status != SBP_DEV_ATTACHED &&
sdev->status != SBP_DEV_PROBE)
sdev = NULL;
}

if (sdev == NULL) {
SBP_DEBUG(1)
printf("%s:%d:%d: Invalid target (target needed)\n",
sc ? device_xname(sc->sc_fd.dev) : "???",
xs->xs_periph->periph_target,
xs->xs_periph->periph_lun);
END_DEBUG

xs->error = XS_DRIVER_STUFFUP;
scsipi_done(xs);
return;
}

SBP_DEBUG(2)
printf("%s:%d:%d:"
" cmd: %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x,"
" flags: 0x%02x, %db cmd/%db data\n",
device_xname(sc->sc_fd.dev),
xs->xs_periph->periph_target,
xs->xs_periph->periph_lun,
xs->cmd->opcode,
xs->cmd->bytes[0], xs->cmd->bytes[1],
xs->cmd->bytes[2], xs->cmd->bytes[3],
xs->cmd->bytes[4], xs->cmd->bytes[5],
xs->cmd->bytes[6], xs->cmd->bytes[7],
xs->cmd->bytes[8],
xs->xs_control & (XS_CTL_DATA_IN | XS_CTL_DATA_OUT),
xs->cmdlen, xs->datalen);
END_DEBUG
mutex_enter(&sc->sc_mtx);
ocb = sbp_get_ocb(sdev);
mutex_exit(&sc->sc_mtx);
if (ocb == NULL) {
xs->error = XS_REQUEUE;
if (sdev->freeze == 0) {
scsipi_periph_freeze(sdev->periph, 1);
sdev->freeze++;
}
scsipi_done(xs);
return;
}

ocb->flags = OCB_ACT_CMD;
ocb->sdev = sdev;
ocb->xs = xs;
ocb->orb[0] = htonl(1 << 31);
ocb->orb[1] = 0;
ocb->orb[2] = htonl(((sc->sc_fd.fc->nodeid | FWLOCALBUS) << 16));
ocb->orb[3] = htonl(ocb->bus_addr + IND_PTR_OFFSET);
speed = uimin(target->fwdev->speed, max_speed);
ocb->orb[4] =
htonl(ORB_NOTIFY | ORB_CMD_SPD(speed) | ORB_CMD_MAXP(speed + 7));
if ((xs->xs_control & (XS_CTL_DATA_IN | XS_CTL_DATA_OUT)) ==
XS_CTL_DATA_IN) {
ocb->orb[4] |= htonl(ORB_CMD_IN);
flag = BUS_DMA_READ;
} else
flag = BUS_DMA_WRITE;

cdb = xs->cmd;
memcpy((void *)&ocb->orb[5], cdb, xs->cmdlen);
/*
printf("ORB %08x %08x %08x %08x\n", ntohl(ocb->orb[0]), ntohl(ocb->orb[1]), ntohl(ocb->orb[2]), ntohl(ocb->orb[3]));
printf("ORB %08x %08x %08x %08x\n", ntohl(ocb->orb[4]), ntohl(ocb->orb[5]), ntohl(ocb->orb[6]), ntohl(ocb->orb[7]));
*/
if (xs->datalen > 0) {
error = bus_dmamap_load(sc->sc_dmat, ocb->dmamap,
xs->data, xs->datalen, NULL, BUS_DMA_NOWAIT | flag);
if (error) {
aprint_error_dev(sc->sc_fd.dev,
"DMA map load error %d\n", error);
xs->error = XS_DRIVER_STUFFUP;
scsipi_done(xs);
} else
sbp_execute_ocb(ocb, ocb->dmamap->dm_segs,
ocb->dmamap->dm_nsegs);
} else
sbp_execute_ocb(ocb, NULL, 0);

return;
}

static void
sbp_execute_ocb(struct sbp_ocb *ocb, bus_dma_segment_t *segments, int seg)
{
struct sbp_ocb *prev;
bus_dma_segment_t *s;
int i;

SBP_DEBUG(2)
printf("sbp_execute_ocb: seg %d", seg);
for (i = 0; i < seg; i++)
printf(", %jx:%jd", (uintmax_t)segments[i].ds_addr,
(uintmax_t)segments[i].ds_len);
printf("\n");
END_DEBUG

if (seg == 1) {
/* direct pointer */
s = segments;
if (s->ds_len > SBP_SEG_MAX)
panic("ds_len > SBP_SEG_MAX, fix busdma code");
ocb->orb[3] = htonl(s->ds_addr);
ocb->orb[4] |= htonl(s->ds_len);
} else if (seg > 1) {
/* page table */
for (i = 0; i < seg; i++) {
s = &segments[i];
SBP_DEBUG(0)
/* XXX LSI Logic "< 16 byte" bug might be hit */
if (s->ds_len < 16)
printf("sbp_execute_ocb: warning, "
"segment length(%jd) is less than 16."
"(seg=%d/%d)\n",
(uintmax_t)s->ds_len, i + 1, seg);
END_DEBUG
if (s->ds_len > SBP_SEG_MAX)
panic("ds_len > SBP_SEG_MAX, fix busdma code");
ocb->ind_ptr[i].hi = htonl(s->ds_len << 16);
ocb->ind_ptr[i].lo = htonl(s->ds_addr);
}
ocb->orb[4] |= htonl(ORB_CMD_PTBL | seg);
}

if (seg > 0) {
struct sbp_softc *sc = ocb->sdev->target->sbp;
const int flag = (ntohl(ocb->orb[4]) & ORB_CMD_IN) ?
BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE;

bus_dmamap_sync(sc->sc_dmat, ocb->dmamap,
0, ocb->dmamap->dm_mapsize, flag);
}
prev = sbp_enqueue_ocb(ocb->sdev, ocb);
SBP_ORB_DMA_SYNC(ocb->sdev->dma, ocb->index, BUS_DMASYNC_PREWRITE);
if (use_doorbell) {
if (prev == NULL) {
if (ocb->sdev->last_ocb != NULL)
sbp_doorbell(ocb->sdev);
else
sbp_orb_pointer(ocb->sdev, ocb);
}
} else
if (prev == NULL || (ocb->sdev->flags & ORB_LINK_DEAD) != 0) {
ocb->sdev->flags &= ~ORB_LINK_DEAD;
sbp_orb_pointer(ocb->sdev, ocb);
}
}

static struct sbp_ocb *
sbp_dequeue_ocb(struct sbp_dev *sdev, struct sbp_status *sbp_status)
{
struct sbp_softc *sc = sdev->target->sbp;
struct sbp_ocb *ocb;
struct sbp_ocb *next;
int order = 0;

SBP_DEBUG(1)
printf("%s:%s:%s: 0x%08x src %d\n", device_xname(sc->sc_fd.dev),
__func__, sdev->bustgtlun, ntohl(sbp_status->orb_lo),
sbp_status->src);
END_DEBUG
mutex_enter(&sc->sc_mtx);
for (ocb = STAILQ_FIRST(&sdev->ocbs); ocb != NULL; ocb = next) {
next = STAILQ_NEXT(ocb, ocb);
if (OCB_MATCH(ocb, sbp_status)) {
/* found */
SBP_ORB_DMA_SYNC(sdev->dma, ocb->index,
BUS_DMASYNC_POSTWRITE);
STAILQ_REMOVE(&sdev->ocbs, ocb, sbp_ocb, ocb);
if (ocb->xs != NULL)
callout_stop(&ocb->xs->xs_callout);
if (ntohl(ocb->orb[4]) & 0xffff) {
const int flag =
(ntohl(ocb->orb[4]) & ORB_CMD_IN) ?
BUS_DMASYNC_POSTREAD :
BUS_DMASYNC_POSTWRITE;

bus_dmamap_sync(sc->sc_dmat, ocb->dmamap,
0, ocb->dmamap->dm_mapsize, flag);
bus_dmamap_unload(sc->sc_dmat, ocb->dmamap);

}
if (!use_doorbell) {
if (sbp_status->src == SRC_NO_NEXT) {
if (next != NULL)
sbp_orb_pointer(sdev, next);
else if (order > 0)
/*
* Unordered execution
* We need to send pointer for
* next ORB
*/
sdev->flags |= ORB_LINK_DEAD;
}
}
break;
} else
order++;
}
mutex_exit(&sc->sc_mtx);

if (ocb && use_doorbell) {
/*
* XXX this is not correct for unordered
* execution.
*/
if (sdev->last_ocb != NULL)
sbp_free_ocb(sdev, sdev->last_ocb);
sdev->last_ocb = ocb;
if (next != NULL &&
sbp_status->src == SRC_NO_NEXT)
sbp_doorbell(sdev);
}

SBP_DEBUG(0)
if (ocb && order > 0)
printf("%s:%s:%s: unordered execution order:%d\n",
device_xname(sc->sc_fd.dev), __func__, sdev->bustgtlun,
order);
END_DEBUG
return ocb;
}

static struct sbp_ocb *
sbp_enqueue_ocb(struct sbp_dev *sdev, struct sbp_ocb *ocb)
{
struct sbp_softc *sc = sdev->target->sbp;
struct sbp_ocb *tocb, *prev, *prev2;

SBP_DEBUG(1)
printf("%s:%s:%s: 0x%08jx\n", device_xname(sc->sc_fd.dev),
__func__, sdev->bustgtlun, (uintmax_t)ocb->bus_addr);
END_DEBUG
mutex_enter(&sc->sc_mtx);
prev = NULL;
STAILQ_FOREACH(tocb, &sdev->ocbs, ocb)
prev = tocb;
prev2 = prev;
STAILQ_INSERT_TAIL(&sdev->ocbs, ocb, ocb);
mutex_exit(&sc->sc_mtx);

callout_reset(&ocb->xs->xs_callout, mstohz(ocb->xs->timeout),
sbp_timeout, ocb);

if (use_doorbell && prev == NULL)
prev2 = sdev->last_ocb;

if (prev2 != NULL) {
SBP_DEBUG(2)
printf("linking chain 0x%jx -> 0x%jx\n",
(uintmax_t)prev2->bus_addr, (uintmax_t)ocb->bus_addr);
END_DEBUG
/*
* Suppress compiler optimization so that orb[1] must be
* written first.
* XXX We may need an explicit memory barrier for other
* architectures other than i386/amd64.
*/
*(volatile uint32_t *)&prev2->orb[1] = htonl(ocb->bus_addr);
*(volatile uint32_t *)&prev2->orb[0] = 0;
}

return prev;
}

static struct sbp_ocb *
sbp_get_ocb(struct sbp_dev *sdev)
{
struct sbp_softc *sc = sdev->target->sbp;
struct sbp_ocb *ocb;

KASSERT(mutex_owned(&sc->sc_mtx));

ocb = STAILQ_FIRST(&sdev->free_ocbs);
if (ocb == NULL) {
sdev->flags |= ORB_SHORTAGE;
aprint_error_dev(sc->sc_fd.dev,
"ocb shortage!!!\n");
return NULL;
}
STAILQ_REMOVE_HEAD(&sdev->free_ocbs, ocb);
ocb->xs = NULL;
return ocb;
}

static void
sbp_free_ocb(struct sbp_dev *sdev, struct sbp_ocb *ocb)
{
struct sbp_softc *sc = sdev->target->sbp;
int count;

ocb->flags = 0;
ocb->xs = NULL;

mutex_enter(&sc->sc_mtx);
STAILQ_INSERT_TAIL(&sdev->free_ocbs, ocb, ocb);
mutex_exit(&sc->sc_mtx);
if (sdev->flags & ORB_SHORTAGE) {
sdev->flags &= ~ORB_SHORTAGE;
count = sdev->freeze;
sdev->freeze = 0;
if (sdev->periph)
scsipi_periph_thaw(sdev->periph, count);
scsipi_channel_thaw(&sc->sc_channel, 0);
}
}

static void
sbp_abort_ocb(struct sbp_ocb *ocb, int status)
{
struct sbp_softc *sc;
struct sbp_dev *sdev;

sdev = ocb->sdev;
sc = sdev->target->sbp;
SBP_DEBUG(0)
printf("%s:%s:%s: sbp_abort_ocb 0x%jx\n", device_xname(sc->sc_fd.dev),
__func__, sdev->bustgtlun, (uintmax_t)ocb->bus_addr);
END_DEBUG
SBP_DEBUG(1)
if (ocb->xs != NULL)
sbp_print_scsi_cmd(ocb);
END_DEBUG
if (ntohl(ocb->orb[4]) & 0xffff) {
const int flag = (ntohl(ocb->orb[4]) & ORB_CMD_IN) ?
BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE;

bus_dmamap_sync(sc->sc_dmat, ocb->dmamap,
0, ocb->dmamap->dm_mapsize, flag);
bus_dmamap_unload(sc->sc_dmat, ocb->dmamap);
}
if (ocb->xs != NULL) {
callout_stop(&ocb->xs->xs_callout);
ocb->xs->error = status;
scsipi_done(ocb->xs);
}
sbp_free_ocb(sdev, ocb);
}

static void
sbp_abort_all_ocbs(struct sbp_dev *sdev, int status)
{
struct sbp_softc *sc = sdev->target->sbp;
struct sbp_ocb *ocb, *next;
STAILQ_HEAD(, sbp_ocb) temp;

mutex_enter(&sc->sc_mtx);
STAILQ_INIT(&temp);
STAILQ_CONCAT(&temp, &sdev->ocbs);
STAILQ_INIT(&sdev->ocbs);
mutex_exit(&sc->sc_mtx);

for (ocb = STAILQ_FIRST(&temp); ocb != NULL; ocb = next) {
next = STAILQ_NEXT(ocb, ocb);
sbp_abort_ocb(ocb, status);
}
if (sdev->last_ocb != NULL) {
sbp_free_ocb(sdev, sdev->last_ocb);
sdev->last_ocb = NULL;
}
}