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freebsd-skq/sys/dev/tws/tws_cam.c
Steven Hartland 85c9dd9d89 Prevent overflow issues in timeout processing 
Previously, any timeout value for which (timeout * hz) will overflow the
signed integer, will give weird results, since callout(9) routines will
convert negative values of ticks to '1'. For unsigned integer overflow we
will get sufficiently smaller timeout values than expected.

Switch from callout_reset, which requires conversion to int based ticks
to callout_reset_sbt to avoid this.

Also correct isci to correctly resolve ccb timeout.

This was based on the original work done by Eygene Ryabinkin
<rea@freebsd.org> back in 5 Aug 2011 which used a macro to help avoid
the overlow.

Differential Revision:	https://reviews.freebsd.org/D1157
Reviewed by:	mav, davide
MFC after:	1 month
Sponsored by:	Multiplay
2014-11-21 21:01:24 +00:00

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/*
* Copyright (c) 2010 LSI Corp.
* All rights reserved.
* Author : Manjunath Ranganathaiah <manjunath.ranganathaiah@lsi.com>
*
* 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.
*
* 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.
*
* $FreeBSD$
*/
#include <dev/tws/tws.h>
#include <dev/tws/tws_services.h>
#include <dev/tws/tws_hdm.h>
#include <dev/tws/tws_user.h>
#include <cam/cam.h>
#include <cam/cam_ccb.h>
#include <cam/cam_sim.h>
#include <cam/cam_xpt_sim.h>
#include <cam/cam_debug.h>
#include <cam/cam_periph.h>
#include <cam/scsi/scsi_all.h>
#include <cam/scsi/scsi_message.h>
static int tws_cam_depth=(TWS_MAX_REQS - TWS_RESERVED_REQS);
static char tws_sev_str[5][8]={"","ERROR","WARNING","INFO","DEBUG"};
static void tws_action(struct cam_sim *sim, union ccb *ccb);
static void tws_poll(struct cam_sim *sim);
static void tws_scsi_complete(struct tws_request *req);
void tws_unmap_request(struct tws_softc *sc, struct tws_request *req);
int32_t tws_map_request(struct tws_softc *sc, struct tws_request *req);
int tws_bus_scan(struct tws_softc *sc);
int tws_cam_attach(struct tws_softc *sc);
void tws_cam_detach(struct tws_softc *sc);
void tws_reset(void *arg);
static void tws_reset_cb(void *arg);
static void tws_reinit(void *arg);
static int32_t tws_execute_scsi(struct tws_softc *sc, union ccb *ccb);
static void tws_freeze_simq(struct tws_softc *sc, struct tws_request *req);
static void tws_dmamap_data_load_cbfn(void *arg, bus_dma_segment_t *segs,
int nseg, int error);
static void tws_fill_sg_list(struct tws_softc *sc, void *sgl_src,
void *sgl_dest, u_int16_t num_sgl_entries);
static void tws_err_complete(struct tws_softc *sc, u_int64_t mfa);
static void tws_scsi_err_complete(struct tws_request *req,
struct tws_command_header *hdr);
static void tws_passthru_err_complete(struct tws_request *req,
struct tws_command_header *hdr);
void tws_timeout(void *arg);
static void tws_intr_attn_aen(struct tws_softc *sc);
static void tws_intr_attn_error(struct tws_softc *sc);
static void tws_intr_resp(struct tws_softc *sc);
void tws_intr(void *arg);
void tws_cmd_complete(struct tws_request *req);
void tws_aen_complete(struct tws_request *req);
int tws_send_scsi_cmd(struct tws_softc *sc, int cmd);
void tws_getset_param_complete(struct tws_request *req);
int tws_set_param(struct tws_softc *sc, u_int32_t table_id, u_int32_t param_id,
u_int32_t param_size, void *data);
int tws_get_param(struct tws_softc *sc, u_int32_t table_id, u_int32_t param_id,
u_int32_t param_size, void *data);
extern struct tws_request *tws_get_request(struct tws_softc *sc,
u_int16_t type);
extern void *tws_release_request(struct tws_request *req);
extern int tws_submit_command(struct tws_softc *sc, struct tws_request *req);
extern boolean tws_get_response(struct tws_softc *sc,
u_int16_t *req_id, u_int64_t *mfa);
extern void tws_q_insert_tail(struct tws_softc *sc, struct tws_request *req,
u_int8_t q_type );
extern struct tws_request * tws_q_remove_request(struct tws_softc *sc,
struct tws_request *req, u_int8_t q_type );
extern void tws_send_event(struct tws_softc *sc, u_int8_t event);
extern struct tws_sense *
tws_find_sense_from_mfa(struct tws_softc *sc, u_int64_t mfa);
extern void tws_fetch_aen(void *arg);
extern void tws_disable_db_intr(struct tws_softc *sc);
extern void tws_enable_db_intr(struct tws_softc *sc);
extern void tws_passthru_complete(struct tws_request *req);
extern void tws_aen_synctime_with_host(struct tws_softc *sc);
extern void tws_circular_aenq_insert(struct tws_softc *sc,
struct tws_circular_q *cq, struct tws_event_packet *aen);
extern int tws_use_32bit_sgls;
extern boolean tws_ctlr_reset(struct tws_softc *sc);
extern struct tws_request * tws_q_remove_tail(struct tws_softc *sc,
u_int8_t q_type );
extern void tws_turn_off_interrupts(struct tws_softc *sc);
extern void tws_turn_on_interrupts(struct tws_softc *sc);
extern int tws_init_connect(struct tws_softc *sc, u_int16_t mc);
extern void tws_init_obfl_q(struct tws_softc *sc);
extern uint8_t tws_get_state(struct tws_softc *sc);
extern void tws_assert_soft_reset(struct tws_softc *sc);
extern boolean tws_ctlr_ready(struct tws_softc *sc);
extern u_int16_t tws_poll4_response(struct tws_softc *sc, u_int64_t *mfa);
extern int tws_setup_intr(struct tws_softc *sc, int irqs);
extern int tws_teardown_intr(struct tws_softc *sc);
int
tws_cam_attach(struct tws_softc *sc)
{
struct cam_devq *devq;
TWS_TRACE_DEBUG(sc, "entry", 0, sc);
/* Create a device queue for sim */
/*
* if the user sets cam depth to less than 1
* cam may get confused
*/
if ( tws_cam_depth < 1 )
tws_cam_depth = 1;
if ( tws_cam_depth > (tws_queue_depth - TWS_RESERVED_REQS) )
tws_cam_depth = tws_queue_depth - TWS_RESERVED_REQS;
TWS_TRACE_DEBUG(sc, "depths,ctlr,cam", tws_queue_depth, tws_cam_depth);
if ((devq = cam_simq_alloc(tws_cam_depth)) == NULL) {
tws_log(sc, CAM_SIMQ_ALLOC);
return(ENOMEM);
}
/*
* Create a SIM entry. Though we can support tws_cam_depth
* simultaneous requests, we claim to be able to handle only
* (tws_cam_depth), so that we always have reserved requests
* packet available to service ioctls and internal commands.
*/
sc->sim = cam_sim_alloc(tws_action, tws_poll, "tws", sc,
device_get_unit(sc->tws_dev),
#if (__FreeBSD_version >= 700000)
&sc->sim_lock,
#endif
tws_cam_depth, 1, devq);
/* 1, 1, devq); */
if (sc->sim == NULL) {
cam_simq_free(devq);
tws_log(sc, CAM_SIM_ALLOC);
}
/* Register the bus. */
mtx_lock(&sc->sim_lock);
if (xpt_bus_register(sc->sim,
#if (__FreeBSD_version >= 700000)
sc->tws_dev,
#endif
0) != CAM_SUCCESS) {
cam_sim_free(sc->sim, TRUE); /* passing true will free the devq */
sc->sim = NULL; /* so cam_detach will not try to free it */
mtx_unlock(&sc->sim_lock);
tws_log(sc, TWS_XPT_BUS_REGISTER);
return(ENXIO);
}
if (xpt_create_path(&sc->path, NULL, cam_sim_path(sc->sim),
CAM_TARGET_WILDCARD,
CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
xpt_bus_deregister(cam_sim_path(sc->sim));
/* Passing TRUE to cam_sim_free will free the devq as well. */
cam_sim_free(sc->sim, TRUE);
tws_log(sc, TWS_XPT_CREATE_PATH);
mtx_unlock(&sc->sim_lock);
return(ENXIO);
}
mtx_unlock(&sc->sim_lock);
return(0);
}
void
tws_cam_detach(struct tws_softc *sc)
{
TWS_TRACE_DEBUG(sc, "entry", 0, 0);
mtx_lock(&sc->sim_lock);
if (sc->path)
xpt_free_path(sc->path);
if (sc->sim) {
xpt_bus_deregister(cam_sim_path(sc->sim));
cam_sim_free(sc->sim, TRUE);
}
mtx_unlock(&sc->sim_lock);
}
int
tws_bus_scan(struct tws_softc *sc)
{
union ccb *ccb;
TWS_TRACE_DEBUG(sc, "entry", sc, 0);
if (!(sc->sim))
return(ENXIO);
ccb = xpt_alloc_ccb();
mtx_lock(&sc->sim_lock);
if (xpt_create_path(&ccb->ccb_h.path, NULL, cam_sim_path(sc->sim),
CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
mtx_unlock(&sc->sim_lock);
xpt_free_ccb(ccb);
return(EIO);
}
xpt_rescan(ccb);
mtx_unlock(&sc->sim_lock);
return(0);
}
static void
tws_action(struct cam_sim *sim, union ccb *ccb)
{
struct tws_softc *sc = (struct tws_softc *)cam_sim_softc(sim);
switch( ccb->ccb_h.func_code ) {
case XPT_SCSI_IO:
{
if ( tws_execute_scsi(sc, ccb) )
TWS_TRACE_DEBUG(sc, "execute scsi failed", 0, 0);
break;
}
case XPT_ABORT:
{
TWS_TRACE_DEBUG(sc, "abort i/o", 0, 0);
ccb->ccb_h.status = CAM_UA_ABORT;
xpt_done(ccb);
break;
}
case XPT_RESET_BUS:
{
TWS_TRACE_DEBUG(sc, "reset bus", sim, ccb);
break;
}
case XPT_SET_TRAN_SETTINGS:
{
TWS_TRACE_DEBUG(sc, "set tran settings", sim, ccb);
ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
xpt_done(ccb);
break;
}
case XPT_GET_TRAN_SETTINGS:
{
TWS_TRACE_DEBUG(sc, "get tran settings", sim, ccb);
#if (__FreeBSD_version >= 700000 )
ccb->cts.protocol = PROTO_SCSI;
ccb->cts.protocol_version = SCSI_REV_2;
ccb->cts.transport = XPORT_SPI;
ccb->cts.transport_version = 2;
ccb->cts.xport_specific.spi.valid = CTS_SPI_VALID_DISC;
ccb->cts.xport_specific.spi.flags = CTS_SPI_FLAGS_DISC_ENB;
ccb->cts.proto_specific.scsi.valid = CTS_SCSI_VALID_TQ;
ccb->cts.proto_specific.scsi.flags = CTS_SCSI_FLAGS_TAG_ENB;
#else
ccb->cts.valid = (CCB_TRANS_DISC_VALID | CCB_TRANS_TQ_VALID);
ccb->cts.flags &= ~(CCB_TRANS_DISC_ENB | CCB_TRANS_TAG_ENB);
#endif
ccb->ccb_h.status = CAM_REQ_CMP;
xpt_done(ccb);
break;
}
case XPT_CALC_GEOMETRY:
{
TWS_TRACE_DEBUG(sc, "calc geometry(ccb,block-size)", ccb,
ccb->ccg.block_size);
cam_calc_geometry(&ccb->ccg, 1/* extended */);
xpt_done(ccb);
break;
}
case XPT_PATH_INQ:
{
TWS_TRACE_DEBUG(sc, "path inquiry", sim, ccb);
ccb->cpi.version_num = 1;
ccb->cpi.hba_inquiry = 0;
ccb->cpi.target_sprt = 0;
ccb->cpi.hba_misc = 0;
ccb->cpi.hba_eng_cnt = 0;
ccb->cpi.max_target = TWS_MAX_NUM_UNITS;
ccb->cpi.max_lun = TWS_MAX_NUM_LUNS - 1;
ccb->cpi.unit_number = cam_sim_unit(sim);
ccb->cpi.bus_id = cam_sim_bus(sim);
ccb->cpi.initiator_id = TWS_SCSI_INITIATOR_ID;
ccb->cpi.base_transfer_speed = 6000000;
strncpy(ccb->cpi.sim_vid, "FreeBSD", SIM_IDLEN);
strncpy(ccb->cpi.hba_vid, "3ware", HBA_IDLEN);
strncpy(ccb->cpi.dev_name, cam_sim_name(sim), DEV_IDLEN);
#if (__FreeBSD_version >= 700000 )
ccb->cpi.transport = XPORT_SPI;
ccb->cpi.transport_version = 2;
ccb->cpi.protocol = PROTO_SCSI;
ccb->cpi.protocol_version = SCSI_REV_2;
ccb->cpi.maxio = TWS_MAX_IO_SIZE;
#endif
ccb->ccb_h.status = CAM_REQ_CMP;
xpt_done(ccb);
break;
}
default:
TWS_TRACE_DEBUG(sc, "default", sim, ccb);
ccb->ccb_h.status = CAM_REQ_INVALID;
xpt_done(ccb);
break;
}
}
static void
tws_scsi_complete(struct tws_request *req)
{
struct tws_softc *sc = req->sc;
mtx_lock(&sc->q_lock);
tws_q_remove_request(sc, req, TWS_BUSY_Q);
mtx_unlock(&sc->q_lock);
callout_stop(&req->timeout);
tws_unmap_request(req->sc, req);
req->ccb_ptr->ccb_h.status = CAM_REQ_CMP;
mtx_lock(&sc->sim_lock);
xpt_done(req->ccb_ptr);
mtx_unlock(&sc->sim_lock);
mtx_lock(&sc->q_lock);
tws_q_insert_tail(sc, req, TWS_FREE_Q);
mtx_unlock(&sc->q_lock);
}
void
tws_getset_param_complete(struct tws_request *req)
{
struct tws_softc *sc = req->sc;
TWS_TRACE_DEBUG(sc, "getset complete", req, req->request_id);
callout_stop(&req->timeout);
tws_unmap_request(sc, req);
free(req->data, M_TWS);
req->state = TWS_REQ_STATE_FREE;
}
void
tws_aen_complete(struct tws_request *req)
{
struct tws_softc *sc = req->sc;
struct tws_command_header *sense;
struct tws_event_packet event;
u_int16_t aen_code=0;
TWS_TRACE_DEBUG(sc, "aen complete", 0, req->request_id);
callout_stop(&req->timeout);
tws_unmap_request(sc, req);
sense = (struct tws_command_header *)req->data;
TWS_TRACE_DEBUG(sc,"sense code, key",sense->sense_data[0],
sense->sense_data[2]);
TWS_TRACE_DEBUG(sc,"sense rid, seve",sense->header_desc.request_id,
sense->status_block.res__severity);
TWS_TRACE_DEBUG(sc,"sense srcnum, error",sense->status_block.srcnum,
sense->status_block.error);
TWS_TRACE_DEBUG(sc,"sense shdr, ssense",sense->header_desc.size_header,
sense->header_desc.size_sense);
aen_code = sense->status_block.error;
switch ( aen_code ) {
case TWS_AEN_SYNC_TIME_WITH_HOST :
tws_aen_synctime_with_host(sc);
break;
case TWS_AEN_QUEUE_EMPTY :
break;
default :
bzero(&event, sizeof(struct tws_event_packet));
event.sequence_id = sc->seq_id;
event.time_stamp_sec = (u_int32_t)TWS_LOCAL_TIME;
event.aen_code = sense->status_block.error;
event.severity = sense->status_block.res__severity & 0x7;
event.event_src = TWS_SRC_CTRL_EVENT;
strcpy(event.severity_str, tws_sev_str[event.severity]);
event.retrieved = TWS_AEN_NOT_RETRIEVED;
bcopy(sense->err_specific_desc, event.parameter_data,
TWS_ERROR_SPECIFIC_DESC_LEN);
event.parameter_data[TWS_ERROR_SPECIFIC_DESC_LEN - 1] = '\0';
event.parameter_len = (u_int8_t)strlen(event.parameter_data)+1;
if ( event.parameter_len < TWS_ERROR_SPECIFIC_DESC_LEN ) {
event.parameter_len += ((u_int8_t)strlen(event.parameter_data +
event.parameter_len) + 1);
}
device_printf(sc->tws_dev, "%s: (0x%02X: 0x%04X): %s: %s\n",
event.severity_str,
event.event_src,
event.aen_code,
event.parameter_data +
(strlen(event.parameter_data) + 1),
event.parameter_data);
mtx_lock(&sc->gen_lock);
tws_circular_aenq_insert(sc, &sc->aen_q, &event);
sc->seq_id++;
mtx_unlock(&sc->gen_lock);
break;
}
free(req->data, M_TWS);
req->state = TWS_REQ_STATE_FREE;
if ( aen_code != TWS_AEN_QUEUE_EMPTY ) {
/* timeout(tws_fetch_aen, sc, 1);*/
sc->stats.num_aens++;
tws_fetch_aen((void *)sc);
}
}
void
tws_cmd_complete(struct tws_request *req)
{
struct tws_softc *sc = req->sc;
callout_stop(&req->timeout);
tws_unmap_request(sc, req);
}
static void
tws_err_complete(struct tws_softc *sc, u_int64_t mfa)
{
struct tws_command_header *hdr;
struct tws_sense *sen;
struct tws_request *req;
u_int16_t req_id;
u_int32_t reg, status;
if ( !mfa ) {
TWS_TRACE_DEBUG(sc, "null mfa", 0, mfa);
return;
} else {
/* lookup the sense */
sen = tws_find_sense_from_mfa(sc, mfa);
if ( sen == NULL ) {
TWS_TRACE_DEBUG(sc, "found null req", 0, mfa);
return;
}
hdr = sen->hdr;
TWS_TRACE_DEBUG(sc, "sen, hdr", sen, hdr);
req_id = hdr->header_desc.request_id;
req = &sc->reqs[req_id];
TWS_TRACE_DEBUG(sc, "req, id", req, req_id);
if ( req->error_code != TWS_REQ_RET_SUBMIT_SUCCESS )
TWS_TRACE_DEBUG(sc, "submit failure?", 0, req->error_code);
}
switch (req->type) {
case TWS_REQ_TYPE_PASSTHRU :
tws_passthru_err_complete(req, hdr);
break;
case TWS_REQ_TYPE_GETSET_PARAM :
tws_getset_param_complete(req);
break;
case TWS_REQ_TYPE_SCSI_IO :
tws_scsi_err_complete(req, hdr);
break;
}
mtx_lock(&sc->io_lock);
hdr->header_desc.size_header = 128;
reg = (u_int32_t)( mfa>>32);
tws_write_reg(sc, TWS_I2O0_HOBQPH, reg, 4);
reg = (u_int32_t)(mfa);
tws_write_reg(sc, TWS_I2O0_HOBQPL, reg, 4);
status = tws_read_reg(sc, TWS_I2O0_STATUS, 4);
if ( status & TWS_BIT13 ) {
device_printf(sc->tws_dev, "OBFL Overrun\n");
sc->obfl_q_overrun = true;
}
mtx_unlock(&sc->io_lock);
}
static void
tws_scsi_err_complete(struct tws_request *req, struct tws_command_header *hdr)
{
u_int8_t *sense_data;
struct tws_softc *sc = req->sc;
union ccb *ccb = req->ccb_ptr;
TWS_TRACE_DEBUG(sc, "sbe, cmd_status", hdr->status_block.error,
req->cmd_pkt->cmd.pkt_a.status);
if ( hdr->status_block.error == TWS_ERROR_LOGICAL_UNIT_NOT_SUPPORTED ||
hdr->status_block.error == TWS_ERROR_UNIT_OFFLINE ) {
if ( ccb->ccb_h.target_lun ) {
TWS_TRACE_DEBUG(sc, "invalid lun error",0,0);
ccb->ccb_h.status |= CAM_DEV_NOT_THERE;
} else {
TWS_TRACE_DEBUG(sc, "invalid target error",0,0);
ccb->ccb_h.status |= CAM_SEL_TIMEOUT;
}
} else {
TWS_TRACE_DEBUG(sc, "scsi status error",0,0);
ccb->ccb_h.status |= CAM_SCSI_STATUS_ERROR;
if (((ccb->csio.cdb_io.cdb_bytes[0] == 0x1A) &&
(hdr->status_block.error == TWS_ERROR_NOT_SUPPORTED))) {
ccb->ccb_h.status |= CAM_SCSI_STATUS_ERROR | CAM_AUTOSNS_VALID;
TWS_TRACE_DEBUG(sc, "page mode not supported",0,0);
}
}
/* if there were no error simply mark complete error */
if (ccb->ccb_h.status == 0)
ccb->ccb_h.status = CAM_REQ_CMP_ERR;
sense_data = (u_int8_t *)&ccb->csio.sense_data;
if (sense_data) {
memcpy(sense_data, hdr->sense_data, TWS_SENSE_DATA_LENGTH );
ccb->csio.sense_len = TWS_SENSE_DATA_LENGTH;
ccb->ccb_h.status |= CAM_AUTOSNS_VALID;
}
ccb->csio.scsi_status = req->cmd_pkt->cmd.pkt_a.status;
ccb->ccb_h.status &= ~CAM_SIM_QUEUED;
mtx_lock(&sc->sim_lock);
xpt_done(ccb);
mtx_unlock(&sc->sim_lock);
callout_stop(&req->timeout);
tws_unmap_request(req->sc, req);
mtx_lock(&sc->q_lock);
tws_q_remove_request(sc, req, TWS_BUSY_Q);
tws_q_insert_tail(sc, req, TWS_FREE_Q);
mtx_unlock(&sc->q_lock);
}
static void
tws_passthru_err_complete(struct tws_request *req,
struct tws_command_header *hdr)
{
TWS_TRACE_DEBUG(req->sc, "entry", hdr, req->request_id);
req->error_code = hdr->status_block.error;
memcpy(&(req->cmd_pkt->hdr), hdr, sizeof(struct tws_command_header));
tws_passthru_complete(req);
}
static void
tws_drain_busy_queue(struct tws_softc *sc)
{
struct tws_request *req;
union ccb *ccb;
TWS_TRACE_DEBUG(sc, "entry", 0, 0);
mtx_lock(&sc->q_lock);
req = tws_q_remove_tail(sc, TWS_BUSY_Q);
mtx_unlock(&sc->q_lock);
while ( req ) {
TWS_TRACE_DEBUG(sc, "moved to TWS_COMPLETE_Q", 0, req->request_id);
callout_stop(&req->timeout);
req->error_code = TWS_REQ_RET_RESET;
ccb = (union ccb *)(req->ccb_ptr);
ccb->ccb_h.status &= ~CAM_SIM_QUEUED;
ccb->ccb_h.status |= CAM_REQUEUE_REQ;
ccb->ccb_h.status |= CAM_SCSI_BUS_RESET;
tws_unmap_request(req->sc, req);
mtx_lock(&sc->sim_lock);
xpt_done(req->ccb_ptr);
mtx_unlock(&sc->sim_lock);
mtx_lock(&sc->q_lock);
tws_q_insert_tail(sc, req, TWS_FREE_Q);
req = tws_q_remove_tail(sc, TWS_BUSY_Q);
mtx_unlock(&sc->q_lock);
}
}
static void
tws_drain_reserved_reqs(struct tws_softc *sc)
{
struct tws_request *r;
r = &sc->reqs[TWS_REQ_TYPE_AEN_FETCH];
if ( r->state != TWS_REQ_STATE_FREE ) {
TWS_TRACE_DEBUG(sc, "reset aen req", 0, 0);
callout_stop(&r->timeout);
tws_unmap_request(sc, r);
free(r->data, M_TWS);
r->state = TWS_REQ_STATE_FREE;
r->error_code = TWS_REQ_RET_RESET;
}
r = &sc->reqs[TWS_REQ_TYPE_PASSTHRU];
if ( r->state == TWS_REQ_STATE_BUSY ) {
TWS_TRACE_DEBUG(sc, "reset passthru req", 0, 0);
r->error_code = TWS_REQ_RET_RESET;
}
r = &sc->reqs[TWS_REQ_TYPE_GETSET_PARAM];
if ( r->state != TWS_REQ_STATE_FREE ) {
TWS_TRACE_DEBUG(sc, "reset setparam req", 0, 0);
callout_stop(&r->timeout);
tws_unmap_request(sc, r);
free(r->data, M_TWS);
r->state = TWS_REQ_STATE_FREE;
r->error_code = TWS_REQ_RET_RESET;
}
}
static void
tws_drain_response_queue(struct tws_softc *sc)
{
u_int16_t req_id;
u_int64_t mfa;
while ( tws_get_response(sc, &req_id, &mfa) );
}
static int32_t
tws_execute_scsi(struct tws_softc *sc, union ccb *ccb)
{
struct tws_command_packet *cmd_pkt;
struct tws_request *req;
struct ccb_hdr *ccb_h = &(ccb->ccb_h);
struct ccb_scsiio *csio = &(ccb->csio);
int error;
u_int16_t lun;
mtx_assert(&sc->sim_lock, MA_OWNED);
if (ccb_h->target_id >= TWS_MAX_NUM_UNITS) {
TWS_TRACE_DEBUG(sc, "traget id too big", ccb_h->target_id, ccb_h->target_lun);
ccb_h->status |= CAM_TID_INVALID;
xpt_done(ccb);
return(0);
}
if (ccb_h->target_lun >= TWS_MAX_NUM_LUNS) {
TWS_TRACE_DEBUG(sc, "target lun 2 big", ccb_h->target_id, ccb_h->target_lun);
ccb_h->status |= CAM_LUN_INVALID;
xpt_done(ccb);
return(0);
}
if(ccb_h->flags & CAM_CDB_PHYS) {
TWS_TRACE_DEBUG(sc, "cdb phy", ccb_h->target_id, ccb_h->target_lun);
ccb_h->status = CAM_REQ_INVALID;
xpt_done(ccb);
return(0);
}
/*
* We are going to work on this request. Mark it as enqueued (though
* we don't actually queue it...)
*/
ccb_h->status |= CAM_SIM_QUEUED;
req = tws_get_request(sc, TWS_REQ_TYPE_SCSI_IO);
if ( !req ) {
TWS_TRACE_DEBUG(sc, "no reqs", ccb_h->target_id, ccb_h->target_lun);
ccb_h->status |= CAM_REQUEUE_REQ;
xpt_done(ccb);
return(0);
}
if((ccb_h->flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
if(ccb_h->flags & CAM_DIR_IN)
req->flags |= TWS_DIR_IN;
if(ccb_h->flags & CAM_DIR_OUT)
req->flags |= TWS_DIR_OUT;
} else {
req->flags = TWS_DIR_NONE; /* no data */
}
req->type = TWS_REQ_TYPE_SCSI_IO;
req->cb = tws_scsi_complete;
cmd_pkt = req->cmd_pkt;
/* cmd_pkt->hdr.header_desc.size_header = 128; */
cmd_pkt->cmd.pkt_a.res__opcode = TWS_FW_CMD_EXECUTE_SCSI;
cmd_pkt->cmd.pkt_a.unit = ccb_h->target_id;
cmd_pkt->cmd.pkt_a.status = 0;
cmd_pkt->cmd.pkt_a.sgl_offset = 16;
/* lower nibble */
lun = ccb_h->target_lun & 0XF;
lun = lun << 12;
cmd_pkt->cmd.pkt_a.lun_l4__req_id = lun | req->request_id;
/* upper nibble */
lun = ccb_h->target_lun & 0XF0;
lun = lun << 8;
cmd_pkt->cmd.pkt_a.lun_h4__sgl_entries = lun;
#ifdef TWS_DEBUG
if ( csio->cdb_len > 16 )
TWS_TRACE(sc, "cdb len too big", ccb_h->target_id, csio->cdb_len);
#endif
if(ccb_h->flags & CAM_CDB_POINTER)
bcopy(csio->cdb_io.cdb_ptr, cmd_pkt->cmd.pkt_a.cdb, csio->cdb_len);
else
bcopy(csio->cdb_io.cdb_bytes, cmd_pkt->cmd.pkt_a.cdb, csio->cdb_len);
req->data = ccb;
req->flags |= TWS_DATA_CCB;
/* save ccb ptr */
req->ccb_ptr = ccb;
/*
* tws_map_load_data_callback will fill in the SGL,
* and submit the I/O.
*/
sc->stats.scsi_ios++;
callout_reset_sbt(&req->timeout, SBT_1MS * ccb->ccb_h.timeout, 0,
tws_timeout, req, 0);
error = tws_map_request(sc, req);
return(error);
}
int
tws_send_scsi_cmd(struct tws_softc *sc, int cmd)
{
struct tws_request *req;
struct tws_command_packet *cmd_pkt;
int error;
TWS_TRACE_DEBUG(sc, "entry",sc, cmd);
req = tws_get_request(sc, TWS_REQ_TYPE_AEN_FETCH);
if ( req == NULL )
return(ENOMEM);
req->cb = tws_aen_complete;
cmd_pkt = req->cmd_pkt;
cmd_pkt->cmd.pkt_a.res__opcode = TWS_FW_CMD_EXECUTE_SCSI;
cmd_pkt->cmd.pkt_a.status = 0;
cmd_pkt->cmd.pkt_a.unit = 0;
cmd_pkt->cmd.pkt_a.sgl_offset = 16;
cmd_pkt->cmd.pkt_a.lun_l4__req_id = req->request_id;
cmd_pkt->cmd.pkt_a.cdb[0] = (u_int8_t)cmd;
cmd_pkt->cmd.pkt_a.cdb[4] = 128;
req->length = TWS_SECTOR_SIZE;
req->data = malloc(TWS_SECTOR_SIZE, M_TWS, M_NOWAIT);
if ( req->data == NULL )
return(ENOMEM);
bzero(req->data, TWS_SECTOR_SIZE);
req->flags = TWS_DIR_IN;
callout_reset(&req->timeout, (TWS_IO_TIMEOUT * hz), tws_timeout, req);
error = tws_map_request(sc, req);
return(error);
}
int
tws_set_param(struct tws_softc *sc, u_int32_t table_id, u_int32_t param_id,
u_int32_t param_size, void *data)
{
struct tws_request *req;
struct tws_command_packet *cmd_pkt;
union tws_command_giga *cmd;
struct tws_getset_param *param;
int error;
req = tws_get_request(sc, TWS_REQ_TYPE_GETSET_PARAM);
if ( req == NULL ) {
TWS_TRACE_DEBUG(sc, "null req", 0, 0);
return(ENOMEM);
}
req->length = TWS_SECTOR_SIZE;
req->data = malloc(TWS_SECTOR_SIZE, M_TWS, M_NOWAIT);
if ( req->data == NULL )
return(ENOMEM);
bzero(req->data, TWS_SECTOR_SIZE);
param = (struct tws_getset_param *)req->data;
req->cb = tws_getset_param_complete;
req->flags = TWS_DIR_OUT;
cmd_pkt = req->cmd_pkt;
cmd = &cmd_pkt->cmd.pkt_g;
cmd->param.sgl_off__opcode =
BUILD_SGL_OFF__OPCODE(2, TWS_FW_CMD_SET_PARAM);
cmd->param.request_id = (u_int8_t)req->request_id;
cmd->param.host_id__unit = 0;
cmd->param.param_count = 1;
cmd->param.size = 2; /* map routine will add sgls */
/* Specify which parameter we want to set. */
param->table_id = (table_id | TWS_9K_PARAM_DESCRIPTOR);
param->parameter_id = (u_int8_t)(param_id);
param->parameter_size_bytes = (u_int16_t)param_size;
memcpy(param->data, data, param_size);
callout_reset(&req->timeout, (TWS_IOCTL_TIMEOUT * hz), tws_timeout, req);
error = tws_map_request(sc, req);
return(error);
}
int
tws_get_param(struct tws_softc *sc, u_int32_t table_id, u_int32_t param_id,
u_int32_t param_size, void *data)
{
struct tws_request *req;
struct tws_command_packet *cmd_pkt;
union tws_command_giga *cmd;
struct tws_getset_param *param;
u_int16_t reqid;
u_int64_t mfa;
int error = SUCCESS;
req = tws_get_request(sc, TWS_REQ_TYPE_GETSET_PARAM);
if ( req == NULL ) {
TWS_TRACE_DEBUG(sc, "null req", 0, 0);
return(FAILURE);
}
req->length = TWS_SECTOR_SIZE;
req->data = malloc(TWS_SECTOR_SIZE, M_TWS, M_NOWAIT);
if ( req->data == NULL )
return(FAILURE);
bzero(req->data, TWS_SECTOR_SIZE);
param = (struct tws_getset_param *)req->data;
req->cb = NULL;
req->flags = TWS_DIR_IN;
cmd_pkt = req->cmd_pkt;
cmd = &cmd_pkt->cmd.pkt_g;
cmd->param.sgl_off__opcode =
BUILD_SGL_OFF__OPCODE(2, TWS_FW_CMD_GET_PARAM);
cmd->param.request_id = (u_int8_t)req->request_id;
cmd->param.host_id__unit = 0;
cmd->param.param_count = 1;
cmd->param.size = 2; /* map routine will add sgls */
/* Specify which parameter we want to set. */
param->table_id = (table_id | TWS_9K_PARAM_DESCRIPTOR);
param->parameter_id = (u_int8_t)(param_id);
param->parameter_size_bytes = (u_int16_t)param_size;
error = tws_map_request(sc, req);
if (!error) {
reqid = tws_poll4_response(sc, &mfa);
tws_unmap_request(sc, req);
if ( reqid == TWS_REQ_TYPE_GETSET_PARAM ) {
memcpy(data, param->data, param_size);
} else {
error = FAILURE;
}
}
free(req->data, M_TWS);
req->state = TWS_REQ_STATE_FREE;
return(error);
}
void
tws_unmap_request(struct tws_softc *sc, struct tws_request *req)
{
if (req->data != NULL) {
if ( req->flags & TWS_DIR_IN )
bus_dmamap_sync(sc->data_tag, req->dma_map,
BUS_DMASYNC_POSTREAD);
if ( req->flags & TWS_DIR_OUT )
bus_dmamap_sync(sc->data_tag, req->dma_map,
BUS_DMASYNC_POSTWRITE);
mtx_lock(&sc->io_lock);
bus_dmamap_unload(sc->data_tag, req->dma_map);
mtx_unlock(&sc->io_lock);
}
}
int32_t
tws_map_request(struct tws_softc *sc, struct tws_request *req)
{
int32_t error = 0;
/* If the command involves data, map that too. */
if (req->data != NULL) {
int my_flags = ((req->type == TWS_REQ_TYPE_SCSI_IO) ? BUS_DMA_WAITOK : BUS_DMA_NOWAIT);
/*
* Map the data buffer into bus space and build the SG list.
*/
mtx_lock(&sc->io_lock);
if (req->flags & TWS_DATA_CCB)
error = bus_dmamap_load_ccb(sc->data_tag, req->dma_map,
req->data,
tws_dmamap_data_load_cbfn, req,
my_flags);
else
error = bus_dmamap_load(sc->data_tag, req->dma_map,
req->data, req->length,
tws_dmamap_data_load_cbfn, req,
my_flags);
mtx_unlock(&sc->io_lock);
if (error == EINPROGRESS) {
TWS_TRACE(sc, "in progress", 0, error);
tws_freeze_simq(sc, req);
error = 0; // EINPROGRESS is not a fatal error.
}
} else { /* no data involved */
error = tws_submit_command(sc, req);
}
return(error);
}
static void
tws_dmamap_data_load_cbfn(void *arg, bus_dma_segment_t *segs,
int nseg, int error)
{
struct tws_request *req = (struct tws_request *)arg;
struct tws_softc *sc = req->sc;
u_int16_t sgls = nseg;
void *sgl_ptr;
struct tws_cmd_generic *gcmd;
if ( error ) {
TWS_TRACE(sc, "SOMETHING BAD HAPPENED! error = %d\n", error, 0);
}
if ( error == EFBIG ) {
TWS_TRACE(sc, "not enough data segs", 0, nseg);
req->error_code = error;
req->ccb_ptr->ccb_h.status = CAM_REQ_TOO_BIG;
return;
}
if ( req->flags & TWS_DIR_IN )
bus_dmamap_sync(req->sc->data_tag, req->dma_map,
BUS_DMASYNC_PREREAD);
if ( req->flags & TWS_DIR_OUT )
bus_dmamap_sync(req->sc->data_tag, req->dma_map,
BUS_DMASYNC_PREWRITE);
if ( segs ) {
if ( (req->type == TWS_REQ_TYPE_PASSTHRU &&
GET_OPCODE(req->cmd_pkt->cmd.pkt_a.res__opcode) !=
TWS_FW_CMD_EXECUTE_SCSI) ||
req->type == TWS_REQ_TYPE_GETSET_PARAM) {
gcmd = &req->cmd_pkt->cmd.pkt_g.generic;
sgl_ptr = (u_int32_t *)(gcmd) + gcmd->size;
gcmd->size += sgls *
((req->sc->is64bit && !tws_use_32bit_sgls) ? 4 : 2 );
tws_fill_sg_list(req->sc, (void *)segs, sgl_ptr, sgls);
} else {
tws_fill_sg_list(req->sc, (void *)segs,
(void *)&(req->cmd_pkt->cmd.pkt_a.sg_list), sgls);
req->cmd_pkt->cmd.pkt_a.lun_h4__sgl_entries |= sgls ;
}
}
req->error_code = tws_submit_command(req->sc, req);
}
static void
tws_fill_sg_list(struct tws_softc *sc, void *sgl_src, void *sgl_dest,
u_int16_t num_sgl_entries)
{
int i;
if ( sc->is64bit ) {
struct tws_sg_desc64 *sgl_s = (struct tws_sg_desc64 *)sgl_src;
if ( !tws_use_32bit_sgls ) {
struct tws_sg_desc64 *sgl_d = (struct tws_sg_desc64 *)sgl_dest;
if ( num_sgl_entries > TWS_MAX_64BIT_SG_ELEMENTS )
TWS_TRACE(sc, "64bit sg overflow", num_sgl_entries, 0);
for (i = 0; i < num_sgl_entries; i++) {
sgl_d[i].address = sgl_s->address;
sgl_d[i].length = sgl_s->length;
sgl_d[i].flag = 0;
sgl_d[i].reserved = 0;
sgl_s = (struct tws_sg_desc64 *) (((u_int8_t *)sgl_s) +
sizeof(bus_dma_segment_t));
}
} else {
struct tws_sg_desc32 *sgl_d = (struct tws_sg_desc32 *)sgl_dest;
if ( num_sgl_entries > TWS_MAX_32BIT_SG_ELEMENTS )
TWS_TRACE(sc, "32bit sg overflow", num_sgl_entries, 0);
for (i = 0; i < num_sgl_entries; i++) {
sgl_d[i].address = sgl_s->address;
sgl_d[i].length = sgl_s->length;
sgl_d[i].flag = 0;
sgl_s = (struct tws_sg_desc64 *) (((u_int8_t *)sgl_s) +
sizeof(bus_dma_segment_t));
}
}
} else {
struct tws_sg_desc32 *sgl_s = (struct tws_sg_desc32 *)sgl_src;
struct tws_sg_desc32 *sgl_d = (struct tws_sg_desc32 *)sgl_dest;
if ( num_sgl_entries > TWS_MAX_32BIT_SG_ELEMENTS )
TWS_TRACE(sc, "32bit sg overflow", num_sgl_entries, 0);
for (i = 0; i < num_sgl_entries; i++) {
sgl_d[i].address = sgl_s[i].address;
sgl_d[i].length = sgl_s[i].length;
sgl_d[i].flag = 0;
}
}
}
void
tws_intr(void *arg)
{
struct tws_softc *sc = (struct tws_softc *)arg;
u_int32_t histat=0, db=0;
if (!(sc)) {
device_printf(sc->tws_dev, "null softc!!!\n");
return;
}
if ( tws_get_state(sc) == TWS_RESET ) {
return;
}
if ( tws_get_state(sc) != TWS_ONLINE ) {
return;
}
sc->stats.num_intrs++;
histat = tws_read_reg(sc, TWS_I2O0_HISTAT, 4);
if ( histat & TWS_BIT2 ) {
TWS_TRACE_DEBUG(sc, "door bell :)", histat, TWS_I2O0_HISTAT);
db = tws_read_reg(sc, TWS_I2O0_IOBDB, 4);
if ( db & TWS_BIT21 ) {
tws_intr_attn_error(sc);
return;
}
if ( db & TWS_BIT18 ) {
tws_intr_attn_aen(sc);
}
}
if ( histat & TWS_BIT3 ) {
tws_intr_resp(sc);
}
}
static void
tws_intr_attn_aen(struct tws_softc *sc)
{
u_int32_t db=0;
/* maskoff db intrs untill all the aens are fetched */
/* tws_disable_db_intr(sc); */
tws_fetch_aen((void *)sc);
tws_write_reg(sc, TWS_I2O0_HOBDBC, TWS_BIT18, 4);
db = tws_read_reg(sc, TWS_I2O0_IOBDB, 4);
}
static void
tws_intr_attn_error(struct tws_softc *sc)
{
u_int32_t db=0;
TWS_TRACE(sc, "attn error", 0, 0);
tws_write_reg(sc, TWS_I2O0_HOBDBC, ~0, 4);
db = tws_read_reg(sc, TWS_I2O0_IOBDB, 4);
device_printf(sc->tws_dev, "Micro controller error.\n");
tws_reset(sc);
}
static void
tws_intr_resp(struct tws_softc *sc)
{
u_int16_t req_id;
u_int64_t mfa;
while ( tws_get_response(sc, &req_id, &mfa) ) {
sc->stats.reqs_out++;
if ( req_id == TWS_INVALID_REQID ) {
TWS_TRACE_DEBUG(sc, "invalid req_id", mfa, req_id);
sc->stats.reqs_errored++;
tws_err_complete(sc, mfa);
continue;
}
sc->reqs[req_id].cb(&sc->reqs[req_id]);
}
}
static void
tws_poll(struct cam_sim *sim)
{
struct tws_softc *sc = (struct tws_softc *)cam_sim_softc(sim);
TWS_TRACE_DEBUG(sc, "entry", 0, 0);
tws_intr((void *) sc);
}
void
tws_timeout(void *arg)
{
struct tws_request *req = (struct tws_request *)arg;
struct tws_softc *sc = req->sc;
if ( req->error_code == TWS_REQ_RET_RESET ) {
return;
}
mtx_lock(&sc->gen_lock);
if ( req->error_code == TWS_REQ_RET_RESET ) {
mtx_unlock(&sc->gen_lock);
return;
}
if ( tws_get_state(sc) == TWS_RESET ) {
mtx_unlock(&sc->gen_lock);
return;
}
xpt_freeze_simq(sc->sim, 1);
tws_send_event(sc, TWS_RESET_START);
if (req->type == TWS_REQ_TYPE_SCSI_IO) {
device_printf(sc->tws_dev, "I/O Request timed out... Resetting controller\n");
} else if (req->type == TWS_REQ_TYPE_PASSTHRU) {
device_printf(sc->tws_dev, "IOCTL Request timed out... Resetting controller\n");
} else {
device_printf(sc->tws_dev, "Internal Request timed out... Resetting controller\n");
}
tws_assert_soft_reset(sc);
tws_turn_off_interrupts(sc);
tws_reset_cb( (void*) sc );
tws_reinit( (void*) sc );
// device_printf(sc->tws_dev, "Controller Reset complete!\n");
tws_send_event(sc, TWS_RESET_COMPLETE);
mtx_unlock(&sc->gen_lock);
xpt_release_simq(sc->sim, 1);
}
void
tws_reset(void *arg)
{
struct tws_softc *sc = (struct tws_softc *)arg;
mtx_lock(&sc->gen_lock);
if ( tws_get_state(sc) == TWS_RESET ) {
mtx_unlock(&sc->gen_lock);
return;
}
xpt_freeze_simq(sc->sim, 1);
tws_send_event(sc, TWS_RESET_START);
device_printf(sc->tws_dev, "Resetting controller\n");
tws_assert_soft_reset(sc);
tws_turn_off_interrupts(sc);
tws_reset_cb( (void*) sc );
tws_reinit( (void*) sc );
// device_printf(sc->tws_dev, "Controller Reset complete!\n");
tws_send_event(sc, TWS_RESET_COMPLETE);
mtx_unlock(&sc->gen_lock);
xpt_release_simq(sc->sim, 1);
}
static void
tws_reset_cb(void *arg)
{
struct tws_softc *sc = (struct tws_softc *)arg;
time_t endt;
int found = 0;
u_int32_t reg;
if ( tws_get_state(sc) != TWS_RESET ) {
return;
}
// device_printf(sc->tws_dev, "Draining Busy Queue\n");
tws_drain_busy_queue(sc);
// device_printf(sc->tws_dev, "Draining Reserved Reqs\n");
tws_drain_reserved_reqs(sc);
// device_printf(sc->tws_dev, "Draining Response Queue\n");
tws_drain_response_queue(sc);
// device_printf(sc->tws_dev, "Looking for controller ready flag...\n");
endt = TWS_LOCAL_TIME + TWS_POLL_TIMEOUT;
while ((TWS_LOCAL_TIME <= endt) && (!found)) {
reg = tws_read_reg(sc, TWS_I2O0_SCRPD3, 4);
if ( reg & TWS_BIT13 ) {
found = 1;
// device_printf(sc->tws_dev, " ... Got it!\n");
}
}
if ( !found )
device_printf(sc->tws_dev, " ... Controller ready flag NOT found!\n");
}
static void
tws_reinit(void *arg)
{
struct tws_softc *sc = (struct tws_softc *)arg;
int timeout_val=0;
int try=2;
int done=0;
// device_printf(sc->tws_dev, "Waiting for Controller Ready\n");
while ( !done && try ) {
if ( tws_ctlr_ready(sc) ) {
done = 1;
break;
} else {
timeout_val += 5;
if ( timeout_val >= TWS_RESET_TIMEOUT ) {
timeout_val = 0;
if ( try )
tws_assert_soft_reset(sc);
try--;
}
mtx_sleep(sc, &sc->gen_lock, 0, "tws_reinit", 5*hz);
}
}
if (!done) {
device_printf(sc->tws_dev, "FAILED to get Controller Ready!\n");
return;
}
sc->obfl_q_overrun = false;
// device_printf(sc->tws_dev, "Sending initConnect\n");
if ( tws_init_connect(sc, tws_queue_depth) ) {
TWS_TRACE_DEBUG(sc, "initConnect failed", 0, sc->is64bit);
}
tws_init_obfl_q(sc);
tws_turn_on_interrupts(sc);
wakeup_one(sc);
}
static void
tws_freeze_simq(struct tws_softc *sc, struct tws_request *req)
{
/* Only for IO commands */
if (req->type == TWS_REQ_TYPE_SCSI_IO) {
union ccb *ccb = (union ccb *)(req->ccb_ptr);
xpt_freeze_simq(sc->sim, 1);
ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
ccb->ccb_h.status |= CAM_REQUEUE_REQ;
}
}
TUNABLE_INT("hw.tws.cam_depth", &tws_cam_depth);
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