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freebsd-dev/sys/pci/amd.c
Justin T. Gibbs 1723e869c1 First cut at a driver for the amd53c974 PCI SCSI host adapter. This 
driver lacks error recovery and still needs more testing, but it's
about time I got it under revision control.

Submitted by:	 Tekram Inc.
Bus Space/DMA and cleanup: gibbs
1999-05-22 21:50:40 +00:00

2437 lines
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/*
*********************************************************************
* FILE NAME : amd.c
* BY : C.L. Huang (ching@tekram.com.tw)
* Erich Chen (erich@tekram.com.tw)
* Description: Device Driver for the amd53c974 PCI Bus Master
* SCSI Host adapter found on cards such as
* the Tekram DC-390(T).
* (C)Copyright 1995-1999 Tekram Technology Co., Ltd.
*
* 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. 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.
*********************************************************************
*/
/*
*********************************************************************
* HISTORY:
*
* REV# DATE NAME DESCRIPTION
* 1.00 07/02/96 CLH First release for RELEASE-2.1.0
* 1.01 08/20/96 CLH Update for RELEASE-2.1.5
* 1.02 11/06/96 CLH Fixed more than 1 LUN scanning
* 1.03 12/20/96 CLH Modify to support 2.2-ALPHA
* 1.04 12/26/97 CLH Modify to support RELEASE-2.2.5
* 1.05 01/01/99 ERICH CHEN Modify to support RELEASE-3.0.x (CAM)
*********************************************************************
*/
/* #define AMD_DEBUG0 */
/* #define AMD_DEBUG_SCSI_PHASE */
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/queue.h>
#include <sys/buf.h>
#include <sys/kernel.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <pci/pcivar.h>
#include <pci/pcireg.h>
#include <machine/bus_pio.h>
#include <machine/bus.h>
#include <machine/clock.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/scsi/scsi_all.h>
#include <cam/scsi/scsi_message.h>
#include <pci/amd.h>
#define PCI_DEVICE_ID_AMD53C974 0x20201022ul
#define PCI_BASE_ADDR0 0x10
typedef u_int (phase_handler_t)(struct amd_softc *, struct amd_srb *, u_int);
typedef phase_handler_t *phase_handler_func_t;
static void amd_intr(void *vamd);
static int amdstart(struct amd_softc *amd, struct amd_srb * pSRB);
static phase_handler_t amd_NopPhase;
static phase_handler_t amd_DataOutPhase0;
static phase_handler_t amd_DataInPhase0;
#define amd_CommandPhase0 amd_NopPhase
static phase_handler_t amd_StatusPhase0;
static phase_handler_t amd_MsgOutPhase0;
static phase_handler_t amd_MsgInPhase0;
static phase_handler_t amd_DataOutPhase1;
static phase_handler_t amd_DataInPhase1;
static phase_handler_t amd_CommandPhase1;
static phase_handler_t amd_StatusPhase1;
static phase_handler_t amd_MsgOutPhase1;
static phase_handler_t amd_MsgInPhase1;
static void amdsetupcommand(struct amd_softc *amd, struct amd_srb *srb);
static int amdparsemsg(struct amd_softc *amd);
static int amdhandlemsgreject(struct amd_softc *amd);
static void amdconstructsdtr(struct amd_softc *amd,
u_int period, u_int offset);
static u_int amdfindclockrate(struct amd_softc *amd, u_int *period);
static int amdsentmsg(struct amd_softc *amd, u_int msgtype, int full);
static void DataIO_Comm(struct amd_softc *amd, struct amd_srb *pSRB, u_int dir);
static void amd_Disconnect(struct amd_softc *amd);
static void amd_Reselect(struct amd_softc *amd);
static void SRBdone(struct amd_softc *amd, struct amd_srb *pSRB);
static void amd_ScsiRstDetect(struct amd_softc *amd);
static void amd_ResetSCSIBus(struct amd_softc *amd);
static void RequestSense(struct amd_softc *amd, struct amd_srb *pSRB);
static void amd_InvalidCmd(struct amd_softc *amd);
static void amd_timeout(void *arg1);
static void amd_reset(struct amd_softc *amd);
static u_int8_t * phystovirt(struct amd_srb *pSRB, u_int32_t xferCnt);
void amd_linkSRB(struct amd_softc *amd);
static struct amd_softc *
amd_init(int unit, pcici_t config_id);
static void amd_load_defaults(struct amd_softc *amd);
static void amd_load_eeprom_or_defaults(struct amd_softc *amd);
static int amd_EEpromInDO(struct amd_softc *amd);
static u_int16_t EEpromGetData1(struct amd_softc *amd);
static void amd_EnDisableCE(struct amd_softc *amd, int mode, int *regval);
static void amd_EEpromOutDI(struct amd_softc *amd, int *regval, int Carry);
static void amd_Prepare(struct amd_softc *amd, int *regval, u_int8_t EEpromCmd);
static void amd_ReadEEprom(struct amd_softc *amd);
static const char *amd_probe(pcici_t tag, pcidi_t type);
static void amd_attach(pcici_t tag, int unit);
static void amdcompletematch(struct amd_softc *amd, target_id_t target,
lun_id_t lun, u_int tag, struct srb_queue *queue,
cam_status status);
static void amdsetsync(struct amd_softc *amd, u_int target, u_int clockrate,
u_int period, u_int offset, u_int type);
static void amdsettags(struct amd_softc *amd, u_int target, int tagenb);
static __inline void amd_clear_msg_state(struct amd_softc *amd);
static __inline void
amd_clear_msg_state(struct amd_softc *amd)
{
amd->msgout_len = 0;
amd->msgout_index = 0;
amd->msgin_index = 0;
}
static u_long amd_count;
/* CAM SIM entry points */
#define ccb_srb_ptr spriv_ptr0
#define ccb_amd_ptr spriv_ptr1
static void amd_action(struct cam_sim *sim, union ccb *ccb);
static void amd_poll(struct cam_sim *sim);
/*
* PCI device module setup
*/
static struct pci_device amd_device =
{
"amd",
amd_probe,
amd_attach,
&amd_count,
NULL
};
#ifdef COMPAT_PCI_DRIVER
COMPAT_PCI_DRIVER(amd, amd_device);
#else
DATA_SET(pcidevice_set, amd_device);
#endif
/*
* State engine function tables indexed by SCSI phase number
*/
phase_handler_func_t amd_SCSI_phase0[] = {
amd_DataOutPhase0,
amd_DataInPhase0,
amd_CommandPhase0,
amd_StatusPhase0,
amd_NopPhase,
amd_NopPhase,
amd_MsgOutPhase0,
amd_MsgInPhase0
};
phase_handler_func_t amd_SCSI_phase1[] = {
amd_DataOutPhase1,
amd_DataInPhase1,
amd_CommandPhase1,
amd_StatusPhase1,
amd_NopPhase,
amd_NopPhase,
amd_MsgOutPhase1,
amd_MsgInPhase1
};
/*
* EEProm/BIOS negotiation periods
*/
u_int8_t eeprom_period[] = {
25, /* 10.0MHz */
32, /* 8.0MHz */
38, /* 6.6MHz */
44, /* 5.7MHz */
50, /* 5.0MHz */
63, /* 4.0MHz */
83, /* 3.0MHz */
125 /* 2.0MHz */
};
/*
* chip clock setting to SCSI specified sync parameter table.
*/
u_int8_t tinfo_sync_period[] = {
25, /* 10.0 */
32, /* 8.0 */
38, /* 6.6 */
44, /* 5.7 */
50, /* 5.0 */
57, /* 4.4 */
63, /* 4.0 */
70, /* 3.6 */
76, /* 3.3 */
83 /* 3.0 */
};
static __inline struct amd_srb *
amdgetsrb(struct amd_softc * amd)
{
int intflag;
struct amd_srb * pSRB;
intflag = splcam();
pSRB = TAILQ_FIRST(&amd->free_srbs);
if (pSRB)
TAILQ_REMOVE(&amd->free_srbs, pSRB, links);
splx(intflag);
return (pSRB);
}
static void
amdsetupcommand(struct amd_softc *amd, struct amd_srb *srb)
{
struct scsi_request_sense sense_cmd;
struct ccb_scsiio *csio;
u_int8_t *cdb;
u_int cdb_len;
csio = &srb->pccb->csio;
if (srb->SRBFlag & AUTO_REQSENSE) {
sense_cmd.opcode = REQUEST_SENSE;
sense_cmd.byte2 = srb->pccb->ccb_h.target_lun << 5;
sense_cmd.unused[0] = 0;
sense_cmd.unused[1] = 0;
sense_cmd.length = csio->sense_len;
sense_cmd.control = 0;
cdb = &sense_cmd.opcode;
cdb_len = sizeof(sense_cmd);
} else {
cdb = &srb->CmdBlock[0];
cdb_len = srb->ScsiCmdLen;
}
amd_write8_multi(amd, SCSIFIFOREG, cdb, cdb_len);
}
/*
* Attempt to start a waiting transaction. Interrupts must be disabled
* upon entry to this function.
*/
static void
amdrunwaiting(struct amd_softc *amd) {
struct amd_srb *srb;
if (amd->last_phase != SCSI_BUS_FREE)
return;
srb = TAILQ_FIRST(&amd->waiting_srbs);
if (srb == NULL)
return;
if (amdstart(amd, srb) == 0) {
TAILQ_REMOVE(&amd->waiting_srbs, srb, links);
TAILQ_INSERT_HEAD(&amd->running_srbs, srb, links);
}
}
static void
amdexecutesrb(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error)
{
struct amd_srb *srb;
union ccb *ccb;
struct amd_softc *amd;
int s;
srb = (struct amd_srb *)arg;
ccb = srb->pccb;
amd = (struct amd_softc *)ccb->ccb_h.ccb_amd_ptr;
if (error != 0) {
if (error != EFBIG)
printf("amd%d: Unexepected error 0x%x returned from "
"bus_dmamap_load\n", amd->unit, error);
if (ccb->ccb_h.status == CAM_REQ_INPROG) {
xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
ccb->ccb_h.status = CAM_REQ_TOO_BIG|CAM_DEV_QFRZN;
}
TAILQ_INSERT_HEAD(&amd->free_srbs, srb, links);
xpt_done(ccb);
return;
}
if (nseg != 0) {
struct amd_sg *sg;
bus_dma_segment_t *end_seg;
bus_dmasync_op_t op;
end_seg = dm_segs + nseg;
/* Copy the segments into our SG list */
srb->pSGlist = &srb->SGsegment[0];
sg = srb->pSGlist;
while (dm_segs < end_seg) {
sg->SGXLen = dm_segs->ds_len;
sg->SGXPtr = dm_segs->ds_addr;
sg++;
dm_segs++;
}
if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
op = BUS_DMASYNC_PREREAD;
else
op = BUS_DMASYNC_PREWRITE;
bus_dmamap_sync(amd->buffer_dmat, srb->dmamap, op);
}
srb->SGcount = nseg;
srb->SGIndex = 0;
srb->AdaptStatus = 0;
srb->TargetStatus = 0;
srb->MsgCnt = 0;
srb->SRBStatus = 0;
srb->SRBFlag = 0;
srb->SRBState = 0;
srb->TotalXferredLen = 0;
srb->SGPhysAddr = 0;
srb->SGToBeXferLen = 0;
srb->EndMessage = 0;
s = splcam();
/*
* Last time we need to check if this CCB needs to
* be aborted.
*/
if (ccb->ccb_h.status != CAM_REQ_INPROG) {
if (nseg != 0)
bus_dmamap_unload(amd->buffer_dmat, srb->dmamap);
TAILQ_INSERT_HEAD(&amd->free_srbs, srb, links);
xpt_done(ccb);
splx(s);
return;
}
ccb->ccb_h.status |= CAM_SIM_QUEUED;
#if 0
/* XXX Need a timeout handler */
ccb->ccb_h.timeout_ch =
timeout(amdtimeout, (caddr_t)srb,
(ccb->ccb_h.timeout * hz) / 1000);
#endif
TAILQ_INSERT_TAIL(&amd->waiting_srbs, srb, links);
amdrunwaiting(amd);
splx(s);
}
static void
amd_action(struct cam_sim * psim, union ccb * pccb)
{
struct amd_softc * amd;
u_int target_id, target_lun;
CAM_DEBUG(pccb->ccb_h.path, CAM_DEBUG_TRACE, ("amd_action\n"));
amd = (struct amd_softc *) cam_sim_softc(psim);
target_id = pccb->ccb_h.target_id;
target_lun = pccb->ccb_h.target_lun;
switch (pccb->ccb_h.func_code) {
case XPT_SCSI_IO:
{
struct amd_srb * pSRB;
struct ccb_scsiio *pcsio;
pcsio = &pccb->csio;
/*
* Assign an SRB and connect it with this ccb.
*/
pSRB = amdgetsrb(amd);
if (!pSRB) {
/* Freeze SIMQ */
pccb->ccb_h.status = CAM_RESRC_UNAVAIL;
xpt_done(pccb);
return;
}
pSRB->pccb = pccb;
pccb->ccb_h.ccb_srb_ptr = pSRB;
pccb->ccb_h.ccb_amd_ptr = amd;
pSRB->ScsiCmdLen = pcsio->cdb_len;
bcopy(pcsio->cdb_io.cdb_bytes, pSRB->CmdBlock, pcsio->cdb_len);
if ((pccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
if ((pccb->ccb_h.flags & CAM_SCATTER_VALID) == 0) {
/*
* We've been given a pointer
* to a single buffer.
*/
if ((pccb->ccb_h.flags & CAM_DATA_PHYS) == 0) {
int s;
int error;
s = splsoftvm();
error =
bus_dmamap_load(amd->buffer_dmat,
pSRB->dmamap,
pcsio->data_ptr,
pcsio->dxfer_len,
amdexecutesrb,
pSRB, /*flags*/0);
if (error == EINPROGRESS) {
/*
* So as to maintain
* ordering, freeze the
* controller queue
* until our mapping is
* returned.
*/
xpt_freeze_simq(amd->psim, 1);
pccb->ccb_h.status |=
CAM_RELEASE_SIMQ;
}
splx(s);
} else {
struct bus_dma_segment seg;
/* Pointer to physical buffer */
seg.ds_addr =
(bus_addr_t)pcsio->data_ptr;
seg.ds_len = pcsio->dxfer_len;
amdexecutesrb(pSRB, &seg, 1, 0);
}
} else {
struct bus_dma_segment *segs;
if ((pccb->ccb_h.flags & CAM_SG_LIST_PHYS) == 0
|| (pccb->ccb_h.flags & CAM_DATA_PHYS) != 0) {
TAILQ_INSERT_HEAD(&amd->free_srbs,
pSRB, links);
pccb->ccb_h.status = CAM_PROVIDE_FAIL;
xpt_done(pccb);
return;
}
/* Just use the segments provided */
segs =
(struct bus_dma_segment *)pcsio->data_ptr;
amdexecutesrb(pSRB, segs, pcsio->sglist_cnt, 0);
}
} else
amdexecutesrb(pSRB, NULL, 0, 0);
break;
}
case XPT_PATH_INQ:
{
struct ccb_pathinq *cpi = &pccb->cpi;
cpi->version_num = 1;
cpi->hba_inquiry = PI_SDTR_ABLE | PI_TAG_ABLE;
cpi->target_sprt = 0;
cpi->hba_misc = 0;
cpi->hba_eng_cnt = 0;
cpi->max_target = 7;
cpi->max_lun = amd->max_lun; /* 7 or 0 */
cpi->initiator_id = amd->AdaptSCSIID;
cpi->bus_id = cam_sim_bus(psim);
strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
strncpy(cpi->hba_vid, "TRM-AMD", HBA_IDLEN);
strncpy(cpi->dev_name, cam_sim_name(psim), DEV_IDLEN);
cpi->unit_number = cam_sim_unit(psim);
cpi->ccb_h.status = CAM_REQ_CMP;
xpt_done(pccb);
break;
}
case XPT_ABORT:
pccb->ccb_h.status = CAM_REQ_INVALID;
xpt_done(pccb);
break;
case XPT_RESET_BUS:
{
int i;
amd_ResetSCSIBus(amd);
amd->ACBFlag = 0;
for (i = 0; i < 500; i++) {
DELAY(1000); /* Wait until our interrupt
* handler sees it */
}
pccb->ccb_h.status = CAM_REQ_CMP;
xpt_done(pccb);
break;
}
case XPT_RESET_DEV:
pccb->ccb_h.status = CAM_REQ_INVALID;
xpt_done(pccb);
break;
case XPT_TERM_IO:
pccb->ccb_h.status = CAM_REQ_INVALID;
xpt_done(pccb);
case XPT_GET_TRAN_SETTINGS:
{
struct ccb_trans_settings *cts;
struct amd_target_info *targ_info;
struct amd_transinfo *tinfo;
int intflag;
cts = &pccb->cts;
intflag = splcam();
targ_info = &amd->tinfo[target_id];
if ((cts->flags & CCB_TRANS_CURRENT_SETTINGS) != 0) {
/* current transfer settings */
if (targ_info->disc_tag & AMD_CUR_DISCENB) {
cts->flags = CCB_TRANS_DISC_ENB;
} else {
cts->flags = 0; /* no tag & disconnect */
}
if (targ_info->disc_tag & AMD_CUR_TAGENB) {
cts->flags |= CCB_TRANS_TAG_ENB;
}
tinfo = &targ_info->current;
} else {
/* default(user) transfer settings */
if (targ_info->disc_tag & AMD_USR_DISCENB) {
cts->flags = CCB_TRANS_DISC_ENB;
} else {
cts->flags = 0;
}
if (targ_info->disc_tag & AMD_USR_TAGENB) {
cts->flags |= CCB_TRANS_TAG_ENB;
}
tinfo = &targ_info->user;
}
cts->sync_period = tinfo->period;
cts->sync_offset = tinfo->offset;
cts->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
splx(intflag);
cts->valid = CCB_TRANS_SYNC_RATE_VALID
| CCB_TRANS_SYNC_OFFSET_VALID
| CCB_TRANS_BUS_WIDTH_VALID
| CCB_TRANS_DISC_VALID
| CCB_TRANS_TQ_VALID;
pccb->ccb_h.status = CAM_REQ_CMP;
xpt_done(pccb);
break;
}
case XPT_SET_TRAN_SETTINGS:
{
struct ccb_trans_settings *cts;
struct amd_target_info *targ_info;
u_int update_type;
int intflag;
int last_entry;
cts = &pccb->cts;
update_type = 0;
if ((cts->flags & CCB_TRANS_CURRENT_SETTINGS) != 0) {
update_type |= AMD_TRANS_GOAL;
} else if ((cts->flags & CCB_TRANS_USER_SETTINGS) != 0) {
update_type |= AMD_TRANS_USER;
}
if (update_type == 0
|| update_type == (AMD_TRANS_USER|AMD_TRANS_GOAL)) {
cts->ccb_h.status = CAM_REQ_INVALID;
xpt_done(pccb);
}
intflag = splcam();
targ_info = &amd->tinfo[target_id];
if ((cts->valid & CCB_TRANS_DISC_VALID) != 0) {
if (update_type & AMD_TRANS_GOAL) {
if ((cts->flags & CCB_TRANS_DISC_ENB) != 0) {
targ_info->disc_tag |= AMD_CUR_DISCENB;
} else {
targ_info->disc_tag &= ~AMD_CUR_DISCENB;
}
}
if (update_type & AMD_TRANS_USER) {
if ((cts->flags & CCB_TRANS_DISC_ENB) != 0) {
targ_info->disc_tag |= AMD_USR_DISCENB;
} else {
targ_info->disc_tag &= ~AMD_USR_DISCENB;
}
}
}
if ((cts->valid & CCB_TRANS_TQ_VALID) != 0) {
if (update_type & AMD_TRANS_GOAL) {
if ((cts->flags & CCB_TRANS_TAG_ENB) != 0) {
targ_info->disc_tag |= AMD_CUR_TAGENB;
} else {
targ_info->disc_tag &= ~AMD_CUR_TAGENB;
}
}
if (update_type & AMD_TRANS_USER) {
if ((cts->flags & CCB_TRANS_TAG_ENB) != 0) {
targ_info->disc_tag |= AMD_USR_TAGENB;
} else {
targ_info->disc_tag &= ~AMD_USR_TAGENB;
}
}
}
if ((cts->valid & CCB_TRANS_SYNC_OFFSET_VALID) == 0) {
if (update_type & AMD_TRANS_GOAL)
cts->sync_offset = targ_info->goal.offset;
else
cts->sync_offset = targ_info->user.offset;
}
if (cts->sync_offset > AMD_MAX_SYNC_OFFSET)
cts->sync_offset = AMD_MAX_SYNC_OFFSET;
if ((cts->valid & CCB_TRANS_SYNC_RATE_VALID) == 0) {
if (update_type & AMD_TRANS_GOAL)
cts->sync_period = targ_info->goal.period;
else
cts->sync_period = targ_info->user.period;
}
last_entry = sizeof(tinfo_sync_period) - 1;
if ((cts->sync_period != 0)
&& (cts->sync_period < tinfo_sync_period[0]))
cts->sync_period = tinfo_sync_period[0];
if (cts->sync_period > tinfo_sync_period[last_entry])
cts->sync_period = 0;
if (cts->sync_offset == 0)
cts->sync_period = 0;
if ((update_type & AMD_TRANS_USER) != 0) {
targ_info->user.period = cts->sync_period;
targ_info->user.offset = cts->sync_offset;
}
if ((update_type & AMD_TRANS_GOAL) != 0) {
targ_info->goal.period = cts->sync_period;
targ_info->goal.offset = cts->sync_offset;
}
splx(intflag);
pccb->ccb_h.status = CAM_REQ_CMP;
xpt_done(pccb);
break;
}
case XPT_CALC_GEOMETRY:
{
struct ccb_calc_geometry *ccg;
u_int32_t size_mb;
u_int32_t secs_per_cylinder;
int extended;
ccg = &pccb->ccg;
size_mb = ccg->volume_size/((1024L * 1024L)/ccg->block_size);
extended = (amd->eepromBuf[EE_MODE2] & GREATER_1G) != 0;
if (size_mb > 1024 && extended) {
ccg->heads = 255;
ccg->secs_per_track = 63;
} else {
ccg->heads = 64;
ccg->secs_per_track = 32;
}
secs_per_cylinder = ccg->heads * ccg->secs_per_track;
ccg->cylinders = ccg->volume_size / secs_per_cylinder;
pccb->ccb_h.status = CAM_REQ_CMP;
xpt_done(pccb);
break;
}
default:
pccb->ccb_h.status = CAM_REQ_INVALID;
xpt_done(pccb);
break;
}
}
static void
amd_poll(struct cam_sim * psim)
{
amd_intr(cam_sim_softc(psim));
}
static u_int8_t *
phystovirt(struct amd_srb * pSRB, u_int32_t xferCnt)
{
int dataPtr;
struct ccb_scsiio *pcsio;
u_int8_t i;
struct amd_sg * pseg;
dataPtr = 0;
pcsio = &pSRB->pccb->csio;
dataPtr = (int) pcsio->data_ptr;
pseg = pSRB->SGsegment;
for (i = 0; i < pSRB->SGIndex; i++) {
dataPtr += (int) pseg->SGXLen;
pseg++;
}
dataPtr += (int) xferCnt;
return ((u_int8_t *) dataPtr);
}
static void
ResetDevParam(struct amd_softc * amd)
{
u_int target;
for (target = 0; target <= amd->max_id; target++) {
if (amd->AdaptSCSIID != target) {
amdsetsync(amd, target, /*clockrate*/0,
/*period*/0, /*offset*/0, AMD_TRANS_CUR);
}
}
}
static void
amdcompletematch(struct amd_softc *amd, target_id_t target, lun_id_t lun,
u_int tag, struct srb_queue *queue, cam_status status)
{
struct amd_srb *srb;
struct amd_srb *next_srb;
for (srb = TAILQ_FIRST(queue); srb != NULL; srb = next_srb) {
union ccb *ccb;
next_srb = TAILQ_NEXT(srb, links);
if (srb->pccb->ccb_h.target_id != target
&& target != CAM_TARGET_WILDCARD)
continue;
if (srb->pccb->ccb_h.target_lun != lun
&& lun != CAM_LUN_WILDCARD)
continue;
if (srb->TagNumber != tag
&& tag != AMD_TAG_WILDCARD)
continue;
ccb = srb->pccb;
TAILQ_REMOVE(queue, srb, links);
TAILQ_INSERT_HEAD(&amd->free_srbs, srb, links);
if ((ccb->ccb_h.status & CAM_DEV_QFRZN) == 0
&& (status & CAM_DEV_QFRZN) != 0)
xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
ccb->ccb_h.status = status;
xpt_done(ccb);
}
}
static void
amdsetsync(struct amd_softc *amd, u_int target, u_int clockrate,
u_int period, u_int offset, u_int type)
{
struct amd_target_info *tinfo;
u_int old_period;
u_int old_offset;
tinfo = &amd->tinfo[target];
old_period = tinfo->current.period;
old_offset = tinfo->current.offset;
if ((type & AMD_TRANS_CUR) != 0
&& (old_period != period || old_offset != offset)) {
struct cam_path *path;
tinfo->current.period = period;
tinfo->current.offset = offset;
tinfo->sync_period_reg = clockrate;
tinfo->sync_offset_reg = offset;
tinfo->CtrlR3 &= ~FAST_SCSI;
tinfo->CtrlR4 &= ~EATER_25NS;
if (clockrate > 7)
tinfo->CtrlR4 |= EATER_25NS;
else
tinfo->CtrlR3 |= FAST_SCSI;
if ((type & AMD_TRANS_ACTIVE) == AMD_TRANS_ACTIVE) {
amd_write8(amd, SYNCPERIOREG, tinfo->sync_period_reg);
amd_write8(amd, SYNCOFFREG, tinfo->sync_offset_reg);
amd_write8(amd, CNTLREG3, tinfo->CtrlR3);
amd_write8(amd, CNTLREG4, tinfo->CtrlR4);
}
/* If possible, update the XPT's notion of our transfer rate */
if (xpt_create_path(&path, /*periph*/NULL,
cam_sim_path(amd->psim), target,
CAM_LUN_WILDCARD) == CAM_REQ_CMP) {
struct ccb_trans_settings neg;
xpt_setup_ccb(&neg.ccb_h, path, /*priority*/1);
neg.sync_period = period;
neg.sync_offset = offset;
neg.valid = CCB_TRANS_SYNC_RATE_VALID
| CCB_TRANS_SYNC_OFFSET_VALID;
xpt_async(AC_TRANSFER_NEG, path, &neg);
xpt_free_path(path);
}
}
if ((type & AMD_TRANS_GOAL) != 0) {
tinfo->goal.period = period;
tinfo->goal.offset = offset;
}
if ((type & AMD_TRANS_USER) != 0) {
tinfo->user.period = period;
tinfo->user.offset = offset;
}
}
static void
amdsettags(struct amd_softc *amd, u_int target, int tagenb)
{
panic("Implement me!\n");
}
/*
**********************************************************************
* Function : amd_reset (struct amd_softc * amd)
* Purpose : perform a hard reset on the SCSI bus( and AMD chip).
* Inputs : cmd - command which caused the SCSI RESET
**********************************************************************
*/
static void
amd_reset(struct amd_softc * amd)
{
int intflag;
u_int8_t bval;
u_int16_t i;
#ifdef AMD_DEBUG0
printf("DC390: RESET");
#endif
intflag = splcam();
bval = amd_read8(amd, CNTLREG1);
bval |= DIS_INT_ON_SCSI_RST;
amd_write8(amd, CNTLREG1, bval); /* disable interrupt */
amd_ResetSCSIBus(amd);
for (i = 0; i < 500; i++) {
DELAY(1000);
}
bval = amd_read8(amd, CNTLREG1);
bval &= ~DIS_INT_ON_SCSI_RST;
amd_write8(amd, CNTLREG1, bval); /* re-enable interrupt */
amd_write8(amd, DMA_Cmd, DMA_IDLE_CMD);
amd_write8(amd, SCSICMDREG, CLEAR_FIFO_CMD);
ResetDevParam(amd);
amdcompletematch(amd, CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD,
AMD_TAG_WILDCARD, &amd->running_srbs,
CAM_DEV_QFRZN|CAM_SCSI_BUS_RESET);
amdcompletematch(amd, CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD,
AMD_TAG_WILDCARD, &amd->waiting_srbs,
CAM_DEV_QFRZN|CAM_SCSI_BUS_RESET);
amd->active_srb = NULL;
amd->ACBFlag = 0;
splx(intflag);
return;
}
void
amd_timeout(void *arg1)
{
struct amd_srb * pSRB;
pSRB = (struct amd_srb *) arg1;
}
static int
amdstart(struct amd_softc *amd, struct amd_srb *pSRB)
{
union ccb *pccb;
struct ccb_scsiio *pcsio;
struct amd_target_info *targ_info;
u_int identify_msg;
u_int command;
u_int target;
u_int lun;
int tagged;
pccb = pSRB->pccb;
pcsio = &pccb->csio;
target = pccb->ccb_h.target_id;
lun = pccb->ccb_h.target_lun;
targ_info = &amd->tinfo[target];
amd_clear_msg_state(amd);
amd_write8(amd, SCSIDESTIDREG, target);
amd_write8(amd, SYNCPERIOREG, targ_info->sync_period_reg);
amd_write8(amd, SYNCOFFREG, targ_info->sync_offset_reg);
amd_write8(amd, CNTLREG1, targ_info->CtrlR1);
amd_write8(amd, CNTLREG3, targ_info->CtrlR3);
amd_write8(amd, CNTLREG4, targ_info->CtrlR4);
amd_write8(amd, SCSICMDREG, CLEAR_FIFO_CMD);
identify_msg = MSG_IDENTIFYFLAG | lun;
if ((targ_info->disc_tag & AMD_CUR_DISCENB) != 0
&& (pccb->ccb_h.flags & CAM_DIS_DISCONNECT) == 0
&& (pSRB->CmdBlock[0] != REQUEST_SENSE)
&& (pSRB->SRBFlag & AUTO_REQSENSE) == 0)
identify_msg |= MSG_IDENTIFY_DISCFLAG;
amd_write8(amd, SCSIFIFOREG, identify_msg);
tagged = 0;
if ((targ_info->disc_tag & AMD_CUR_TAGENB) == 0
|| (identify_msg & MSG_IDENTIFY_DISCFLAG) == 0)
pccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
if (targ_info->current.period != targ_info->goal.period
|| targ_info->current.offset != targ_info->goal.offset) {
command = SEL_W_ATN_STOP;
amdconstructsdtr(amd, targ_info->goal.period,
targ_info->goal.offset);
} else if ((pccb->ccb_h.flags & CAM_TAG_ACTION_VALID) != 0) {
command = SEL_W_ATN2;
pSRB->SRBState = SRB_START;
amd_write8(amd, SCSIFIFOREG, pcsio->tag_action);
amd_write8(amd, SCSIFIFOREG, pSRB->TagNumber);
tagged++;
} else {
command = SEL_W_ATN;
pSRB->SRBState = SRB_START;
}
if (command != SEL_W_ATN_STOP)
amdsetupcommand(amd, pSRB);
if (amd_read8(amd, SCSISTATREG) & INTERRUPT) {
pSRB->SRBState = SRB_READY;
return (1);
} else {
amd->last_phase = SCSI_ARBITRATING;
amd_write8(amd, SCSICMDREG, command);
amd->active_srb = pSRB;
amd->cur_target = target;
amd->cur_lun = lun;
return (0);
}
}
/*
* Catch an interrupt from the adapter.
* Process pending device interrupts.
*/
static void
amd_intr(void *arg)
{
struct amd_softc *amd;
struct amd_srb *pSRB;
u_int internstat = 0;
u_int scsistat;
u_int intstat;
amd = (struct amd_softc *)arg;
if (amd == NULL) {
#ifdef AMD_DEBUG0
printf("amd_intr: amd NULL return......");
#endif
return;
}
scsistat = amd_read8(amd, SCSISTATREG);
if (!(scsistat & INTERRUPT)) {
#ifdef AMD_DEBUG0
printf("amd_intr: scsistat = NULL ,return......");
#endif
return;
}
#ifdef AMD_DEBUG_SCSI_PHASE
printf("scsistat=%2x,", scsistat);
#endif
internstat = amd_read8(amd, INTERNSTATREG);
intstat = amd_read8(amd, INTSTATREG);
#ifdef AMD_DEBUG_SCSI_PHASE
printf("intstat=%2x,", intstat);
#endif
if (intstat & DISCONNECTED) {
amd_Disconnect(amd);
return;
}
if (intstat & RESELECTED) {
amd_Reselect(amd);
return;
}
if (intstat & INVALID_CMD) {
amd_InvalidCmd(amd);
return;
}
if (intstat & SCSI_RESET_) {
amd_ScsiRstDetect(amd);
return;
}
if (intstat & (SUCCESSFUL_OP + SERVICE_REQUEST)) {
pSRB = amd->active_srb;
/*
* Run our state engine. First perform
* post processing for the last phase we
* were in, followed by any processing
* required to handle the current phase.
*/
scsistat =
amd_SCSI_phase0[amd->last_phase](amd, pSRB, scsistat);
amd->last_phase = scsistat & SCSI_PHASE_MASK;
(void)amd_SCSI_phase1[amd->last_phase](amd, pSRB, scsistat);
}
}
static u_int
amd_DataOutPhase0(struct amd_softc *amd, struct amd_srb *pSRB, u_int scsistat)
{
struct amd_sg *psgl;
u_int32_t ResidCnt, xferCnt;
if (!(pSRB->SRBState & SRB_XFERPAD)) {
if (scsistat & PARITY_ERR) {
pSRB->SRBStatus |= PARITY_ERROR;
}
if (scsistat & COUNT_2_ZERO) {
while ((amd_read8(amd, DMA_Status)&DMA_XFER_DONE) == 0)
;
pSRB->TotalXferredLen += pSRB->SGToBeXferLen;
pSRB->SGIndex++;
if (pSRB->SGIndex < pSRB->SGcount) {
pSRB->pSGlist++;
psgl = pSRB->pSGlist;
pSRB->SGPhysAddr = psgl->SGXPtr;
pSRB->SGToBeXferLen = psgl->SGXLen;
} else {
pSRB->SGToBeXferLen = 0;
}
} else {
ResidCnt = amd_read8(amd, CURRENTFIFOREG) & 0x1f;
ResidCnt += amd_read8(amd, CTCREG_LOW)
| (amd_read8(amd, CTCREG_MID) << 8)
| (amd_read8(amd, CURTXTCNTREG) << 16);
xferCnt = pSRB->SGToBeXferLen - ResidCnt;
pSRB->SGPhysAddr += xferCnt;
pSRB->TotalXferredLen += xferCnt;
pSRB->SGToBeXferLen = ResidCnt;
}
}
amd_write8(amd, DMA_Cmd, WRITE_DIRECTION | DMA_IDLE_CMD);
return (scsistat);
}
static u_int
amd_DataInPhase0(struct amd_softc *amd, struct amd_srb *pSRB, u_int scsistat)
{
u_int8_t bval;
u_int16_t i, residual;
struct amd_sg *psgl;
u_int32_t ResidCnt, xferCnt;
u_int8_t * ptr;
if (!(pSRB->SRBState & SRB_XFERPAD)) {
if (scsistat & PARITY_ERR) {
pSRB->SRBStatus |= PARITY_ERROR;
}
if (scsistat & COUNT_2_ZERO) {
while (1) {
bval = amd_read8(amd, DMA_Status);
if ((bval & DMA_XFER_DONE) != 0)
break;
}
amd_write8(amd, DMA_Cmd, READ_DIRECTION|DMA_IDLE_CMD);
pSRB->TotalXferredLen += pSRB->SGToBeXferLen;
pSRB->SGIndex++;
if (pSRB->SGIndex < pSRB->SGcount) {
pSRB->pSGlist++;
psgl = pSRB->pSGlist;
pSRB->SGPhysAddr = psgl->SGXPtr;
pSRB->SGToBeXferLen = psgl->SGXLen;
} else {
pSRB->SGToBeXferLen = 0;
}
} else { /* phase changed */
residual = 0;
bval = amd_read8(amd, CURRENTFIFOREG);
while (bval & 0x1f) {
if ((bval & 0x1f) == 1) {
for (i = 0; i < 0x100; i++) {
bval = amd_read8(amd, CURRENTFIFOREG);
if (!(bval & 0x1f)) {
goto din_1;
} else if (i == 0x0ff) {
residual = 1;
goto din_1;
}
}
} else {
bval = amd_read8(amd, CURRENTFIFOREG);
}
}
din_1:
amd_write8(amd, DMA_Cmd, READ_DIRECTION|DMA_BLAST_CMD);
for (i = 0; i < 0x8000; i++) {
if ((amd_read8(amd, DMA_Status)&BLAST_COMPLETE))
break;
}
amd_write8(amd, DMA_Cmd, READ_DIRECTION|DMA_IDLE_CMD);
ResidCnt = amd_read8(amd, CTCREG_LOW)
| (amd_read8(amd, CTCREG_MID) << 8)
| (amd_read8(amd, CURTXTCNTREG) << 16);
xferCnt = pSRB->SGToBeXferLen - ResidCnt;
pSRB->SGPhysAddr += xferCnt;
pSRB->TotalXferredLen += xferCnt;
pSRB->SGToBeXferLen = ResidCnt;
if (residual) {
/* get residual byte */
bval = amd_read8(amd, SCSIFIFOREG);
ptr = phystovirt(pSRB, xferCnt);
*ptr = bval;
pSRB->SGPhysAddr++;
pSRB->TotalXferredLen++;
pSRB->SGToBeXferLen--;
}
}
}
return (scsistat);
}
static u_int
amd_StatusPhase0(struct amd_softc *amd, struct amd_srb *pSRB, u_int scsistat)
{
pSRB->TargetStatus = amd_read8(amd, SCSIFIFOREG);
/* get message */
pSRB->EndMessage = amd_read8(amd, SCSIFIFOREG);
pSRB->SRBState = SRB_COMPLETED;
amd_write8(amd, SCSICMDREG, MSG_ACCEPTED_CMD);
return (SCSI_NOP0);
}
static u_int
amd_MsgOutPhase0(struct amd_softc *amd, struct amd_srb *pSRB, u_int scsistat)
{
if (pSRB->SRBState & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT)) {
scsistat = SCSI_NOP0;
}
return (scsistat);
}
static u_int
amd_MsgInPhase0(struct amd_softc *amd, struct amd_srb *pSRB, u_int scsistat)
{
int done;
amd->msgin_buf[amd->msgin_index] = amd_read8(amd, SCSIFIFOREG);
done = amdparsemsg(amd);
if (done)
amd->msgin_index = 0;
else
amd->msgin_index++;
return (SCSI_NOP0);
}
static int
amdparsemsg(struct amd_softc *amd)
{
struct amd_target_info *targ_info;
int reject;
int done;
int response;
done = FALSE;
response = FALSE;
reject = FALSE;
targ_info = &amd->tinfo[amd->cur_target];
/*
* Parse as much of the message as is availible,
* rejecting it if we don't support it. When
* the entire message is availible and has been
* handled, return TRUE indicating that we have
* parsed an entire message.
*/
switch (amd->msgin_buf[0]) {
case MSG_DISCONNECT:
amd->active_srb->SRBState = SRB_DISCONNECT;
amd->disc_count[amd->cur_target][amd->cur_lun]++;
done = TRUE;
break;
case MSG_SIMPLE_Q_TAG:
{
struct amd_srb *disc_srb;
if (amd->msgin_index < 1)
break;
disc_srb = &amd->SRB_array[amd->msgin_buf[1]];
if (amd->active_srb != NULL
|| disc_srb->SRBState != SRB_DISCONNECT
|| disc_srb->pccb->ccb_h.target_id != amd->cur_target
|| disc_srb->pccb->ccb_h.target_lun != amd->cur_lun) {
printf("amd%d: Unexpected tagged reselection "
"for target %d, Issuing Abort\n", amd->unit,
amd->cur_target);
amd->msgout_buf[0] = MSG_ABORT;
amd->msgout_len = 1;
response = TRUE;
break;
}
amd->active_srb = disc_srb;
amd->disc_count[amd->cur_target][amd->cur_lun]--;
done = TRUE;
break;
}
case MSG_MESSAGE_REJECT:
response = amdhandlemsgreject(amd);
if (response == FALSE)
amd_write8(amd, SCSICMDREG, RESET_ATN_CMD);
/* FALLTHROUGH */
case MSG_NOOP:
done = TRUE;
break;
case MSG_EXTENDED:
{
u_int clockrate;
u_int period;
u_int offset;
u_int saved_offset;
/* Wait for enough of the message to begin validation */
if (amd->msgin_index < 1)
break;
if (amd->msgin_buf[1] != MSG_EXT_SDTR_LEN) {
reject = TRUE;
break;
}
/* Wait for opcode */
if (amd->msgin_index < 2)
break;
if (amd->msgin_buf[2] != MSG_EXT_SDTR) {
reject = TRUE;
break;
}
/*
* Wait until we have both args before validating
* and acting on this message.
*
* Add one to MSG_EXT_SDTR_LEN to account for
* the extended message preamble.
*/
if (amd->msgin_index < (MSG_EXT_SDTR_LEN + 1))
break;
period = amd->msgin_buf[3];
saved_offset = offset = amd->msgin_buf[4];
clockrate = amdfindclockrate(amd, &period);
if (offset > AMD_MAX_SYNC_OFFSET)
offset = AMD_MAX_SYNC_OFFSET;
if (period == 0 || offset == 0) {
offset = 0;
period = 0;
clockrate = 0;
}
amdsetsync(amd, amd->cur_target, clockrate, period, offset,
AMD_TRANS_ACTIVE|AMD_TRANS_GOAL);
/*
* See if we initiated Sync Negotiation
* and didn't have to fall down to async
* transfers.
*/
if (amdsentmsg(amd, MSG_EXT_SDTR, /*full*/TRUE)) {
/* We started it */
if (saved_offset != offset) {
/* Went too low - force async */
reject = TRUE;
}
} else {
/*
* Send our own SDTR in reply
*/
if (bootverbose)
printf("Sending SDTR!\n");
amd->msgout_index = 0;
amd->msgout_len = 0;
amdconstructsdtr(amd, period, offset);
amd->msgout_index = 0;
response = TRUE;
}
done = TRUE;
break;
}
case MSG_SAVEDATAPOINTER:
case MSG_RESTOREPOINTERS:
/* XXX Implement!!! */
done = TRUE;
break;
default:
reject = TRUE;
break;
}
if (reject) {
amd->msgout_index = 0;
amd->msgout_len = 1;
amd->msgout_buf[0] = MSG_MESSAGE_REJECT;
done = TRUE;
response = TRUE;
}
if (response)
amd_write8(amd, SCSICMDREG, SET_ATN_CMD);
if (done && !response)
/* Clear the outgoing message buffer */
amd->msgout_len = 0;
/* Drop Ack */
amd_write8(amd, SCSICMDREG, MSG_ACCEPTED_CMD);
return (done);
}
static u_int
amdfindclockrate(struct amd_softc *amd, u_int *period)
{
u_int i;
u_int clockrate;
for (i = 0; i < sizeof(tinfo_sync_period); i++) {
u_int8_t *table_entry;
table_entry = &tinfo_sync_period[i];
if (*period <= *table_entry) {
/*
* When responding to a target that requests
* sync, the requested rate may fall between
* two rates that we can output, but still be
* a rate that we can receive. Because of this,
* we want to respond to the target with
* the same rate that it sent to us even
* if the period we use to send data to it
* is lower. Only lower the response period
* if we must.
*/
if (i == 0) {
*period = *table_entry;
}
break;
}
}
if (i == sizeof(tinfo_sync_period)) {
/* Too slow for us. Use asnyc transfers. */
*period = 0;
clockrate = 0;
} else
clockrate = i + 4;
return (clockrate);
}
/*
* See if we sent a particular extended message to the target.
* If "full" is true, the target saw the full message.
* If "full" is false, the target saw at least the first
* byte of the message.
*/
static int
amdsentmsg(struct amd_softc *amd, u_int msgtype, int full)
{
int found;
int index;
found = FALSE;
index = 0;
while (index < amd->msgout_len) {
if ((amd->msgout_buf[index] & MSG_IDENTIFYFLAG) != 0
|| amd->msgout_buf[index] == MSG_MESSAGE_REJECT)
index++;
else if (amd->msgout_buf[index] >= MSG_SIMPLE_Q_TAG
&& amd->msgout_buf[index] < MSG_IGN_WIDE_RESIDUE) {
/* Skip tag type and tag id */
index += 2;
} else if (amd->msgout_buf[index] == MSG_EXTENDED) {
/* Found a candidate */
if (amd->msgout_buf[index+2] == msgtype) {
u_int end_index;
end_index = index + 1
+ amd->msgout_buf[index + 1];
if (full) {
if (amd->msgout_index > end_index)
found = TRUE;
} else if (amd->msgout_index > index)
found = TRUE;
}
break;
} else {
panic("amdsentmsg: Inconsistent msg buffer");
}
}
return (found);
}
static void
amdconstructsdtr(struct amd_softc *amd, u_int period, u_int offset)
{
amd->msgout_buf[amd->msgout_index++] = MSG_EXTENDED;
amd->msgout_buf[amd->msgout_index++] = MSG_EXT_SDTR_LEN;
amd->msgout_buf[amd->msgout_index++] = MSG_EXT_SDTR;
amd->msgout_buf[amd->msgout_index++] = period;
amd->msgout_buf[amd->msgout_index++] = offset;
amd->msgout_len += 5;
}
static int
amdhandlemsgreject(struct amd_softc *amd)
{
/*
* If we had an outstanding SDTR for this
* target, this is a signal that the target
* is refusing negotiation. Also watch out
* for rejected tag messages.
*/
struct amd_srb *srb;
struct amd_target_info *targ_info;
int response = FALSE;
srb = amd->active_srb;
targ_info = &amd->tinfo[amd->cur_target];
if (amdsentmsg(amd, MSG_EXT_SDTR, /*full*/FALSE)) {
/* note asynch xfers and clear flag */
amdsetsync(amd, amd->cur_target, /*clockrate*/0,
/*period*/0, /*offset*/0,
AMD_TRANS_ACTIVE|AMD_TRANS_GOAL);
printf("amd%d:%d: refuses synchronous negotiation. "
"Using asynchronous transfers\n",
amd->unit, amd->cur_target);
} else if ((srb != NULL)
&& (srb->pccb->ccb_h.flags & CAM_TAG_ACTION_VALID) != 0) {
struct ccb_trans_settings neg;
printf("amd%d:%d: refuses tagged commands. Performing "
"non-tagged I/O\n", amd->unit, amd->cur_target);
amdsettags(amd, amd->cur_target, FALSE);
neg.flags = 0;
neg.valid = CCB_TRANS_TQ_VALID;
xpt_setup_ccb(&neg.ccb_h, srb->pccb->ccb_h.path, /*priority*/1);
xpt_async(AC_TRANSFER_NEG, srb->pccb->ccb_h.path, &neg);
/*
* Resend the identify for this CCB as the target
* may believe that the selection is invalid otherwise.
*/
if (amd->msgout_len != 0)
bcopy(&amd->msgout_buf[0], &amd->msgout_buf[1],
amd->msgout_len);
amd->msgout_buf[0] = MSG_IDENTIFYFLAG
| srb->pccb->ccb_h.target_lun;
amd->msgout_len++;
if ((targ_info->disc_tag & AMD_CUR_DISCENB) != 0
&& (srb->pccb->ccb_h.flags & CAM_DIS_DISCONNECT) == 0)
amd->msgout_buf[0] |= MSG_IDENTIFY_DISCFLAG;
srb->pccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
/*
* Requeue all tagged commands for this target
* currently in our posession so they can be
* converted to untagged commands.
*/
amdcompletematch(amd, amd->cur_target, amd->cur_lun,
AMD_TAG_WILDCARD, &amd->waiting_srbs,
CAM_DEV_QFRZN|CAM_REQUEUE_REQ);
} else {
/*
* Otherwise, we ignore it.
*/
printf("amd%d:%d: Message reject received -- ignored\n",
amd->unit, amd->cur_target);
}
return (response);
}
#if 0
if (!(pSRB->SRBState & SRB_MSGIN_MULTI)) {
if (bval == MSG_DISCONNECT) {
pSRB->SRBState = SRB_DISCONNECT;
} else if (bval == MSG_SAVEDATAPOINTER) {
goto min6;
} else if ((bval == MSG_EXTENDED)
|| ((bval >= MSG_SIMPLE_Q_TAG)
&& (bval <= MSG_ORDERED_Q_TAG))) {
pSRB->SRBState |= SRB_MSGIN_MULTI;
pSRB->MsgInBuf[0] = bval;
pSRB->MsgCnt = 1;
pSRB->pMsgPtr = &pSRB->MsgInBuf[1];
} else if (bval == MSG_MESSAGE_REJECT) {
amd_write8(amd, SCSICMDREG, RESET_ATN_CMD);
if (pSRB->SRBState & DO_SYNC_NEGO) {
goto set_async;
}
} else if (bval == MSG_RESTOREPOINTERS) {
goto min6;
} else {
goto min6;
}
} else { /* minx: */
*pSRB->pMsgPtr = bval;
pSRB->MsgCnt++;
pSRB->pMsgPtr++;
if ((pSRB->MsgInBuf[0] >= MSG_SIMPLE_Q_TAG)
&& (pSRB->MsgInBuf[0] <= MSG_ORDERED_Q_TAG)) {
if (pSRB->MsgCnt == 2) {
pSRB->SRBState = 0;
pSRB = &amd->SRB_array[pSRB->MsgInBuf[1]];
if (pSRB->SRBState & SRB_DISCONNECT) == 0) {
pSRB = amd->pTmpSRB;
pSRB->SRBState = SRB_UNEXPECT_RESEL;
pDCB->pActiveSRB = pSRB;
pSRB->MsgOutBuf[0] = MSG_ABORT_TAG;
EnableMsgOut2(amd, pSRB);
} else {
if (pDCB->DCBFlag & ABORT_DEV_) {
pSRB->SRBState = SRB_ABORT_SENT;
EnableMsgOut1(amd, pSRB);
}
pDCB->pActiveSRB = pSRB;
pSRB->SRBState = SRB_DATA_XFER;
}
}
} else if ((pSRB->MsgInBuf[0] == MSG_EXTENDED)
&& (pSRB->MsgCnt == 5)) {
pSRB->SRBState &= ~(SRB_MSGIN_MULTI + DO_SYNC_NEGO);
if ((pSRB->MsgInBuf[1] != 3)
|| (pSRB->MsgInBuf[2] != 1)) { /* reject_msg: */
pSRB->MsgCnt = 1;
pSRB->MsgInBuf[0] = MSG_MESSAGE_REJECT;
amd_write8(amd, SCSICMDREG, SET_ATN_CMD);
} else if (!(pSRB->MsgInBuf[3])
|| !(pSRB->MsgInBuf[4])) {
set_async: /* set async */
pDCB = pSRB->pSRBDCB;
/* disable sync & sync nego */
pDCB->SyncMode &= ~(SYNC_ENABLE|SYNC_NEGO_DONE);
pDCB->SyncPeriod = 0;
pDCB->SyncOffset = 0;
pDCB->tinfo.goal.period = 0;
pDCB->tinfo.goal.offset = 0;
pDCB->tinfo.current.period = 0;
pDCB->tinfo.current.offset = 0;
pDCB->tinfo.current.width =
MSG_EXT_WDTR_BUS_8_BIT;
pDCB->CtrlR3 = FAST_CLK; /* non_fast */
pDCB->CtrlR4 &= 0x3f;
pDCB->CtrlR4 |= EATER_25NS;
goto re_prog;
} else {/* set sync */
pDCB = pSRB->pSRBDCB;
/* enable sync & sync nego */
pDCB->SyncMode |= SYNC_ENABLE|SYNC_NEGO_DONE;
/* set sync offset */
pDCB->SyncOffset &= 0x0f0;
pDCB->SyncOffset |= pSRB->MsgInBuf[4];
/* set sync period */
pDCB->MaxNegoPeriod = pSRB->MsgInBuf[3];
wval = (u_int16_t) pSRB->MsgInBuf[3];
wval = wval << 2;
wval--;
wval1 = wval / 25;
if ((wval1 * 25) != wval) {
wval1++;
}
bval = FAST_CLK|FAST_SCSI;
pDCB->CtrlR4 &= 0x3f;
if (wval1 >= 8) {
/* Fast SCSI */
wval1--;
bval = FAST_CLK;
pDCB->CtrlR4 |= EATER_25NS;
}
pDCB->CtrlR3 = bval;
pDCB->SyncPeriod = (u_int8_t) wval1;
pDCB->tinfo.goal.period =
tinfo_sync_period[pDCB->SyncPeriod - 4];
pDCB->tinfo.goal.offset = pDCB->SyncOffset;
pDCB->tinfo.current.period =
tinfo_sync_period[pDCB->SyncPeriod - 4];;
pDCB->tinfo.current.offset = pDCB->SyncOffset;
/*
* program SCSI control register
*/
re_prog:
amd_write8(amd, SYNCPERIOREG, pDCB->SyncPeriod);
amd_write8(amd, SYNCOFFREG, pDCB->SyncOffset);
amd_write8(amd, CNTLREG3, pDCB->CtrlR3);
amd_write8(amd, CNTLREG4, pDCB->CtrlR4);
}
}
}
min6:
amd_write8(amd, SCSICMDREG, MSG_ACCEPTED_CMD);
return (SCSI_NOP0);
}
#endif
static u_int
amd_DataOutPhase1(struct amd_softc *amd, struct amd_srb *pSRB, u_int scsistat)
{
DataIO_Comm(amd, pSRB, WRITE_DIRECTION);
return (scsistat);
}
static u_int
amd_DataInPhase1(struct amd_softc *amd, struct amd_srb *pSRB, u_int scsistat)
{
DataIO_Comm(amd, pSRB, READ_DIRECTION);
return (scsistat);
}
static void
DataIO_Comm(struct amd_softc *amd, struct amd_srb *pSRB, u_int ioDir)
{
struct amd_sg * psgl;
u_int32_t lval;
if (pSRB->SGIndex < pSRB->SGcount) {
amd_write8(amd, DMA_Cmd, DMA_IDLE_CMD|ioDir);/* |EN_DMA_INT */
if (!pSRB->SGToBeXferLen) {
psgl = pSRB->pSGlist;
pSRB->SGPhysAddr = psgl->SGXPtr;
pSRB->SGToBeXferLen = psgl->SGXLen;
}
lval = pSRB->SGToBeXferLen;
amd_write8(amd, CTCREG_LOW, lval);
amd_write8(amd, CTCREG_MID, lval >> 8);
amd_write8(amd, CURTXTCNTREG, lval >> 16);
amd_write32(amd, DMA_XferCnt, pSRB->SGToBeXferLen);
amd_write32(amd, DMA_XferAddr, pSRB->SGPhysAddr);
pSRB->SRBState = SRB_DATA_XFER;
amd_write8(amd, SCSICMDREG, DMA_COMMAND|INFO_XFER_CMD);
amd_write8(amd, DMA_Cmd, DMA_IDLE_CMD|ioDir); /* |EN_DMA_INT */
amd_write8(amd, DMA_Cmd, DMA_START_CMD|ioDir);/* |EN_DMA_INT */
} else { /* xfer pad */
if (pSRB->SGcount) {
pSRB->AdaptStatus = H_OVER_UNDER_RUN;
pSRB->SRBStatus |= OVER_RUN;
}
amd_write8(amd, CTCREG_LOW, 0);
amd_write8(amd, CTCREG_MID, 0);
amd_write8(amd, CURTXTCNTREG, 0);
pSRB->SRBState |= SRB_XFERPAD;
amd_write8(amd, SCSICMDREG, DMA_COMMAND|XFER_PAD_BYTE);
}
}
static u_int
amd_CommandPhase1(struct amd_softc *amd, struct amd_srb *srb, u_int scsistat)
{
amd_write8(amd, SCSICMDREG, RESET_ATN_CMD);
amd_write8(amd, SCSICMDREG, CLEAR_FIFO_CMD);
amdsetupcommand(amd, srb);
srb->SRBState = SRB_COMMAND;
amd_write8(amd, SCSICMDREG, INFO_XFER_CMD);
return (scsistat);
}
static u_int
amd_StatusPhase1(struct amd_softc *amd, struct amd_srb *pSRB, u_int scsistat)
{
amd_write8(amd, SCSICMDREG, CLEAR_FIFO_CMD);
pSRB->SRBState = SRB_STATUS;
amd_write8(amd, SCSICMDREG, INITIATOR_CMD_CMPLTE);
return (scsistat);
}
static u_int
amd_MsgOutPhase1(struct amd_softc *amd, struct amd_srb *pSRB, u_int scsistat)
{
amd_write8(amd, SCSICMDREG, CLEAR_FIFO_CMD);
if (amd->msgout_len == 0) {
amd->msgout_buf[0] = MSG_NOOP;
amd->msgout_len = 1;
}
amd_write8_multi(amd, SCSIFIFOREG, amd->msgout_buf, amd->msgout_len);
amd_write8(amd, SCSICMDREG, INFO_XFER_CMD);
return (scsistat);
}
static u_int
amd_MsgInPhase1(struct amd_softc *amd, struct amd_srb *pSRB, u_int scsistat)
{
amd_write8(amd, SCSICMDREG, CLEAR_FIFO_CMD);
amd_write8(amd, SCSICMDREG, INFO_XFER_CMD);
return (scsistat);
}
static u_int
amd_NopPhase(struct amd_softc *amd, struct amd_srb *pSRB, u_int scsistat)
{
return (scsistat);
}
static void
amd_Disconnect(struct amd_softc * amd)
{
struct amd_srb *srb;
int target;
int lun;
srb = amd->active_srb;
amd->active_srb = NULL;
amd->last_phase = SCSI_BUS_FREE;
amd_write8(amd, SCSICMDREG, EN_SEL_RESEL);
target = amd->cur_target;
lun = amd->cur_lun;
if (srb == NULL) {
/* Invalid reselection */
amdrunwaiting(amd);
} else if (srb->SRBState & SRB_ABORT_SENT) {
/* Clean up and done this srb */
#if 0
while (( = TAILQ_FIRST(&amd->running_srbs)) != NULL) {
/* XXX What about "done'ing" these srbs??? */
if (pSRB->pSRBDCB == pDCB) {
TAILQ_REMOVE(&amd->running_srbs, pSRB, links);
TAILQ_INSERT_HEAD(&amd->free_srbs, pSRB, links);
}
}
amdrunwaiting(amd);
#endif
} else {
if ((srb->SRBState & (SRB_START | SRB_MSGOUT))
|| !(srb->SRBState & (SRB_DISCONNECT | SRB_COMPLETED))) {
srb->TargetStatus = AMD_SCSI_STAT_SEL_TIMEOUT;
goto disc1;
} else if (srb->SRBState & SRB_DISCONNECT) {
if (!(srb->pccb->ccb_h.flags & CAM_TAG_ACTION_VALID))
amd->untagged_srbs[target][lun] = srb;
amdrunwaiting(amd);
} else if (srb->SRBState & SRB_COMPLETED) {
disc1:
srb->SRBState = SRB_FREE;
SRBdone(amd, srb);
}
}
return;
}
static void
amd_Reselect(struct amd_softc *amd)
{
struct amd_target_info *tinfo;
u_int16_t disc_count;
amd_clear_msg_state(amd);
if (amd->active_srb != NULL) {
/* Requeue the SRB for our attempted Selection */
TAILQ_REMOVE(&amd->running_srbs, amd->active_srb, links);
TAILQ_INSERT_HEAD(&amd->waiting_srbs, amd->active_srb, links);
amd->active_srb = NULL;
}
/* get ID */
amd->cur_target = amd_read8(amd, SCSIFIFOREG);
amd->cur_target ^= amd->HostID_Bit;
amd->cur_target = ffs(amd->cur_target) - 1;
amd->cur_lun = amd_read8(amd, SCSIFIFOREG) & 7;
tinfo = &amd->tinfo[amd->cur_target];
amd->active_srb = amd->untagged_srbs[amd->cur_target][amd->cur_lun];
disc_count = amd->disc_count[amd->cur_target][amd->cur_lun];
if (disc_count == 0) {
printf("amd%d: Unexpected reselection for target %d, "
"Issuing Abort\n", amd->unit, amd->cur_target);
amd->msgout_buf[0] = MSG_ABORT;
amd->msgout_len = 1;
amd_write8(amd, SCSICMDREG, SET_ATN_CMD);
}
if (amd->active_srb != NULL) {
amd->disc_count[amd->cur_target][amd->cur_lun]--;
amd->untagged_srbs[amd->cur_target][amd->cur_lun] = NULL;
}
amd_write8(amd, SCSIDESTIDREG, amd->cur_target);
amd_write8(amd, SYNCPERIOREG, tinfo->sync_period_reg);
amd_write8(amd, SYNCOFFREG, tinfo->sync_offset_reg);
amd_write8(amd, CNTLREG1, tinfo->CtrlR1);
amd_write8(amd, CNTLREG3, tinfo->CtrlR3);
amd_write8(amd, CNTLREG4, tinfo->CtrlR4);
amd_write8(amd, SCSICMDREG, MSG_ACCEPTED_CMD);/* drop /ACK */
amd->last_phase = SCSI_NOP0;
}
static void
SRBdone(struct amd_softc *amd, struct amd_srb *pSRB)
{
u_int8_t bval, i, status;
union ccb *pccb;
struct ccb_scsiio *pcsio;
int intflag;
struct amd_sg *ptr2;
u_int32_t swlval;
u_int target_id, target_lun;
pccb = pSRB->pccb;
pcsio = &pccb->csio;
target_id = pSRB->pccb->ccb_h.target_id;
target_lun = pSRB->pccb->ccb_h.target_lun;
CAM_DEBUG(pccb->ccb_h.path, CAM_DEBUG_TRACE,
("SRBdone - TagNumber %d\n", pSRB->TagNumber));
if ((pccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
bus_dmasync_op_t op;
if ((pccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
op = BUS_DMASYNC_POSTREAD;
else
op = BUS_DMASYNC_POSTWRITE;
bus_dmamap_sync(amd->buffer_dmat, pSRB->dmamap, op);
bus_dmamap_unload(amd->buffer_dmat, pSRB->dmamap);
}
status = pSRB->TargetStatus;
pccb->ccb_h.status = CAM_REQ_CMP;
if (pSRB->SRBFlag & AUTO_REQSENSE) {
pSRB->SRBFlag &= ~AUTO_REQSENSE;
pSRB->AdaptStatus = 0;
pSRB->TargetStatus = SCSI_STATUS_CHECK_COND;
if (status == SCSI_STATUS_CHECK_COND) {
pccb->ccb_h.status = CAM_SEL_TIMEOUT;
goto ckc_e;
}
*((u_int32_t *)&(pSRB->CmdBlock[0])) = pSRB->Segment0[0];
pcsio->sense_resid = pcsio->sense_len
- pSRB->TotalXferredLen;
pSRB->TotalXferredLen = pSRB->Segment1[1];
if (pSRB->TotalXferredLen) {
/* ???? */
pcsio->resid = pcsio->dxfer_len
- pSRB->TotalXferredLen;
/* The resid field contains valid data */
/* Flush resid bytes on complete */
} else {
pcsio->scsi_status = SCSI_STATUS_CHECK_COND;
}
pccb->ccb_h.status = CAM_AUTOSNS_VALID;
goto ckc_e;
}
if (status) {
if (status == SCSI_STATUS_CHECK_COND) {
if ((pSRB->SGIndex < pSRB->SGcount)
&& (pSRB->SGcount) && (pSRB->SGToBeXferLen)) {
bval = pSRB->SGcount;
swlval = pSRB->SGToBeXferLen;
ptr2 = pSRB->pSGlist;
ptr2++;
for (i = pSRB->SGIndex + 1; i < bval; i++) {
swlval += ptr2->SGXLen;
ptr2++;
}
/* ??????? */
pcsio->resid = (u_int32_t) swlval;
#ifdef AMD_DEBUG0
printf("XferredLen=%8x,NotYetXferLen=%8x,",
pSRB->TotalXferredLen, swlval);
#endif
}
if ((pcsio->ccb_h.flags & CAM_DIS_AUTOSENSE) == 0) {
#ifdef AMD_DEBUG0
printf("RequestSense..................\n");
#endif
RequestSense(amd, pSRB);
return;
}
pcsio->scsi_status = SCSI_STATUS_CHECK_COND;
pccb->ccb_h.status = CAM_SCSI_STATUS_ERROR;
goto ckc_e;
} else if (status == SCSI_STATUS_QUEUE_FULL) {
pSRB->AdaptStatus = 0;
pSRB->TargetStatus = 0;
pcsio->scsi_status = SCSI_STATUS_QUEUE_FULL;
pccb->ccb_h.status = CAM_SCSI_STATUS_ERROR;
goto ckc_e;
} else if (status == AMD_SCSI_STAT_SEL_TIMEOUT) {
pSRB->AdaptStatus = H_SEL_TIMEOUT;
pSRB->TargetStatus = 0;
pcsio->scsi_status = AMD_SCSI_STAT_SEL_TIMEOUT;
pccb->ccb_h.status = CAM_SEL_TIMEOUT;
} else if (status == SCSI_STATUS_BUSY) {
#ifdef AMD_DEBUG0
printf("DC390: target busy at %s %d\n",
__FILE__, __LINE__);
#endif
pcsio->scsi_status = SCSI_STATUS_BUSY;
pccb->ccb_h.status = CAM_SCSI_BUSY;
} else if (status == SCSI_STATUS_RESERV_CONFLICT) {
#ifdef AMD_DEBUG0
printf("DC390: target reserved at %s %d\n",
__FILE__, __LINE__);
#endif
pcsio->scsi_status = SCSI_STATUS_RESERV_CONFLICT;
pccb->ccb_h.status = CAM_SCSI_STATUS_ERROR; /* XXX */
} else {
pSRB->AdaptStatus = 0;
#ifdef AMD_DEBUG0
printf("DC390: driver stuffup at %s %d\n",
__FILE__, __LINE__);
#endif
pccb->ccb_h.status = CAM_SCSI_STATUS_ERROR;
}
} else {
status = pSRB->AdaptStatus;
if (status & H_OVER_UNDER_RUN) {
pSRB->TargetStatus = 0;
pccb->ccb_h.status = CAM_DATA_RUN_ERR;
} else if (pSRB->SRBStatus & PARITY_ERROR) {
#ifdef AMD_DEBUG0
printf("DC390: driver stuffup %s %d\n",
__FILE__, __LINE__);
#endif
/* Driver failed to perform operation */
pccb->ccb_h.status = CAM_UNCOR_PARITY;
} else { /* No error */
pSRB->AdaptStatus = 0;
pSRB->TargetStatus = 0;
/* there is no error, (sense is invalid) */
}
}
ckc_e:
intflag = splcam();
if ((pccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
/* CAM request not yet complete =>device_Q frozen */
xpt_freeze_devq(pccb->ccb_h.path, 1);
pccb->ccb_h.status |= CAM_DEV_QFRZN;
}
TAILQ_REMOVE(&amd->running_srbs, pSRB, links);
TAILQ_INSERT_HEAD(&amd->free_srbs, pSRB, links);
amdrunwaiting(amd);
splx(intflag);
xpt_done(pccb);
}
static void
amd_ResetSCSIBus(struct amd_softc * amd)
{
int intflag;
intflag = splcam();
amd->ACBFlag |= RESET_DEV;
amd_write8(amd, DMA_Cmd, DMA_IDLE_CMD);
amd_write8(amd, SCSICMDREG, RST_SCSI_BUS_CMD);
splx(intflag);
return;
}
static void
amd_ScsiRstDetect(struct amd_softc * amd)
{
int intflag;
u_int32_t wlval;
#ifdef AMD_DEBUG0
printf("amd_ScsiRstDetect \n");
#endif
wlval = 1000;
while (--wlval) { /* delay 1 sec */
DELAY(1000);
}
intflag = splcam();
amd_write8(amd, DMA_Cmd, DMA_IDLE_CMD);
amd_write8(amd, SCSICMDREG, CLEAR_FIFO_CMD);
if (amd->ACBFlag & RESET_DEV) {
amd->ACBFlag |= RESET_DONE;
} else {
amd->ACBFlag |= RESET_DETECT;
ResetDevParam(amd);
amdcompletematch(amd, CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD,
AMD_TAG_WILDCARD, &amd->running_srbs,
CAM_DEV_QFRZN|CAM_SCSI_BUS_RESET);
amdcompletematch(amd, CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD,
AMD_TAG_WILDCARD, &amd->waiting_srbs,
CAM_DEV_QFRZN|CAM_SCSI_BUS_RESET);
amd->active_srb = NULL;
amd->ACBFlag = 0;
amdrunwaiting(amd);
}
splx(intflag);
return;
}
static void
RequestSense(struct amd_softc *amd, struct amd_srb *pSRB)
{
union ccb *pccb;
struct ccb_scsiio *pcsio;
pccb = pSRB->pccb;
pcsio = &pccb->csio;
pSRB->SRBFlag |= AUTO_REQSENSE;
pSRB->Segment0[0] = *((u_int32_t *) & (pSRB->CmdBlock[0]));
pSRB->Segment0[1] = *((u_int32_t *) & (pSRB->CmdBlock[4]));
pSRB->Segment1[0] = (pSRB->ScsiCmdLen << 8) + pSRB->SGcount;
pSRB->Segment1[1] = pSRB->TotalXferredLen;
pSRB->AdaptStatus = 0;
pSRB->TargetStatus = 0;
pSRB->Segmentx.SGXPtr = (u_int32_t) vtophys(&pcsio->sense_data);
pSRB->Segmentx.SGXLen = (u_int32_t) pcsio->sense_len;
pSRB->pSGlist = &pSRB->Segmentx;
pSRB->SGcount = 1;
pSRB->SGIndex = 0;
*((u_int32_t *) & (pSRB->CmdBlock[0])) = 0x00000003;
pSRB->CmdBlock[1] = pSRB->pccb->ccb_h.target_lun << 5;
*((u_int16_t *) & (pSRB->CmdBlock[4])) = pcsio->sense_len;
pSRB->ScsiCmdLen = 6;
pSRB->TotalXferredLen = 0;
pSRB->SGToBeXferLen = 0;
if (amdstart(amd, pSRB) != 0) {
TAILQ_REMOVE(&amd->running_srbs, pSRB, links);
TAILQ_INSERT_HEAD(&amd->waiting_srbs, pSRB, links);
}
}
static void
amd_InvalidCmd(struct amd_softc * amd)
{
struct amd_srb *srb;
srb = amd->active_srb;
if (srb->SRBState & (SRB_START|SRB_MSGOUT))
amd_write8(amd, SCSICMDREG, CLEAR_FIFO_CMD);
}
void
amd_linkSRB(struct amd_softc *amd)
{
u_int16_t count, i;
struct amd_srb *psrb;
count = amd->SRBCount;
for (i = 0; i < count; i++) {
psrb = (struct amd_srb *)&amd->SRB_array[i];
psrb->TagNumber = i;
TAILQ_INSERT_TAIL(&amd->free_srbs, psrb, links);
}
}
void
amd_EnDisableCE(struct amd_softc *amd, int mode, int *regval)
{
if (mode == ENABLE_CE) {
*regval = 0xc0;
} else {
*regval = 0x80;
}
pci_cfgwrite(amd->config_id, *regval, 0, /*bytes*/1);
if (mode == DISABLE_CE) {
pci_cfgwrite(amd->config_id, *regval, 0, /*bytes*/1);
}
DELAY(160);
}
void
amd_EEpromOutDI(struct amd_softc *amd, int *regval, int Carry)
{
u_int bval;
bval = 0;
if (Carry) {
bval = 0x40;
*regval = 0x80;
pci_cfgwrite(amd->config_id, *regval, bval, /*bytes*/1);
}
DELAY(160);
bval |= 0x80;
pci_cfgwrite(amd->config_id, *regval, bval, /*bytes*/1);
DELAY(160);
pci_cfgwrite(amd->config_id, *regval, 0, /*bytes*/1);
DELAY(160);
}
static int
amd_EEpromInDO(struct amd_softc *amd)
{
pci_cfgwrite(amd->config_id, 0x80, 0x80, /*bytes*/1);
DELAY(160);
pci_cfgwrite(amd->config_id, 0x80, 0x40, /*bytes*/1);
DELAY(160);
if (pci_cfgread(amd->config_id, 0, /*bytes*/1) == 0x22)
return (1);
return (0);
}
static u_int16_t
EEpromGetData1(struct amd_softc *amd)
{
u_int i;
u_int carryFlag;
u_int16_t wval;
wval = 0;
for (i = 0; i < 16; i++) {
wval <<= 1;
carryFlag = amd_EEpromInDO(amd);
wval |= carryFlag;
}
return (wval);
}
static void
amd_Prepare(struct amd_softc *amd, int *regval, u_int8_t EEpromCmd)
{
u_int i, j;
int carryFlag;
carryFlag = 1;
j = 0x80;
for (i = 0; i < 9; i++) {
amd_EEpromOutDI(amd, regval, carryFlag);
carryFlag = (EEpromCmd & j) ? 1 : 0;
j >>= 1;
}
}
static void
amd_ReadEEprom(struct amd_softc *amd)
{
int regval;
u_int i;
u_int16_t *ptr;
u_int8_t cmd;
ptr = (u_int16_t *)&amd->eepromBuf[0];
cmd = EEPROM_READ;
for (i = 0; i < 0x40; i++) {
amd_EnDisableCE(amd, ENABLE_CE, &regval);
amd_Prepare(amd, &regval, cmd);
*ptr = EEpromGetData1(amd);
ptr++;
cmd++;
amd_EnDisableCE(amd, DISABLE_CE, &regval);
}
}
static void
amd_load_defaults(struct amd_softc *amd)
{
int target;
bzero(&amd->eepromBuf, sizeof amd->eepromBuf);
for (target = 0; target < MAX_SCSI_ID; target++)
amd->eepromBuf[target << 2] =
(TAG_QUEUING|EN_DISCONNECT|SYNC_NEGO|PARITY_CHK);
amd->eepromBuf[EE_ADAPT_SCSI_ID] = 7;
amd->eepromBuf[EE_MODE2] = ACTIVE_NEGATION|LUN_CHECK|GREATER_1G;
amd->eepromBuf[EE_TAG_CMD_NUM] = 4;
}
static void
amd_load_eeprom_or_defaults(struct amd_softc *amd)
{
u_int16_t wval, *ptr;
u_int8_t i;
amd_ReadEEprom(amd);
wval = 0;
ptr = (u_int16_t *) & amd->eepromBuf[0];
for (i = 0; i < EE_DATA_SIZE; i += 2, ptr++)
wval += *ptr;
if (wval != EE_CHECKSUM) {
if (bootverbose)
printf("amd%d: SEEPROM data unavailable. "
"Using default device parameters.\n",
amd->unit);
amd_load_defaults(amd);
}
}
/*
**********************************************************************
* Function : static int amd_init (struct Scsi_Host *host)
* Purpose : initialize the internal structures for a given SCSI host
* Inputs : host - pointer to this host adapter's structure/
**********************************************************************
*/
static struct amd_softc *
amd_init(int unit, pcici_t config_id)
{
struct amd_softc *amd;
u_int bval;
u_int i;
amd = (struct amd_softc *)malloc(sizeof(struct amd_softc),
M_DEVBUF, M_WAITOK);
if (amd == NULL) {
printf("DC390%d: cannot allocate ACB !\n", unit);
return (amd);
}
bzero(amd, sizeof(struct amd_softc));
amd->tag = I386_BUS_SPACE_IO;
amd->bsh = pci_conf_read(config_id, PCI_MAP_REG_START) & 0xFFFE;
/* DMA tag for mapping buffers into device visible space. */
if (bus_dma_tag_create(/*parent_dmat*/NULL, /*alignment*/0,
/*boundary*/0,
/*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
/*highaddr*/BUS_SPACE_MAXADDR,
/*filter*/NULL, /*filterarg*/NULL,
/*maxsize*/MAXBSIZE, /*nsegments*/AMD_NSEG,
/*maxsegsz*/AMD_MAXTRANSFER_SIZE,
/*flags*/BUS_DMA_ALLOCNOW,
&amd->buffer_dmat) != 0) {
free(amd, M_DEVBUF);
return (NULL);
}
TAILQ_INIT(&amd->free_srbs);
TAILQ_INIT(&amd->running_srbs);
TAILQ_INIT(&amd->waiting_srbs);
amd->last_phase = SCSI_BUS_FREE;
amd->config_id = config_id;
amd->unit = unit;
amd->SRBCount = MAX_SRB_CNT;
amd->status = 0;
amd_load_eeprom_or_defaults(amd);
amd->max_id = 7;
if (amd->eepromBuf[EE_MODE2] & LUN_CHECK) {
amd->max_lun = 7;
} else {
amd->max_lun = 0;
}
amd->AdaptSCSIID = amd->eepromBuf[EE_ADAPT_SCSI_ID];
amd->HostID_Bit = (1 << amd->AdaptSCSIID);
amd->AdaptSCSILUN = 0;
/* (eepromBuf[EE_TAG_CMD_NUM]) << 2; */
amd->ACBFlag = 0;
amd->Gmode2 = amd->eepromBuf[EE_MODE2];
amd_linkSRB(amd);
for (i = 0; i <= amd->max_id; i++) {
if (amd->AdaptSCSIID != i) {
struct amd_target_info *tinfo;
PEEprom prom;
tinfo = &amd->tinfo[i];
prom = (PEEprom)&amd->eepromBuf[i << 2];
if ((prom->EE_MODE1 & EN_DISCONNECT) != 0) {
tinfo->disc_tag |= AMD_USR_DISCENB;
if ((prom->EE_MODE1 & TAG_QUEUING) != 0)
tinfo->disc_tag |= AMD_USR_TAGENB;
}
if ((prom->EE_MODE1 & SYNC_NEGO) != 0) {
tinfo->user.period =
eeprom_period[prom->EE_SPEED];
tinfo->user.offset = AMD_MAX_SYNC_OFFSET;
}
tinfo->CtrlR1 = amd->AdaptSCSIID;
if ((prom->EE_MODE1 & PARITY_CHK) != 0)
tinfo->CtrlR1 |= PARITY_ERR_REPO;
tinfo->CtrlR3 = FAST_CLK;
tinfo->CtrlR4 = EATER_25NS;
if ((amd->eepromBuf[EE_MODE2] & ACTIVE_NEGATION) != 0)
tinfo->CtrlR4 |= NEGATE_REQACKDATA;
}
}
amd_write8(amd, SCSITIMEOUTREG, 153); /* 250ms selection timeout */
/* Conversion factor = 0 , 40MHz clock */
amd_write8(amd, CLKFACTREG, CLK_FREQ_40MHZ);
/* NOP cmd - clear command register */
amd_write8(amd, SCSICMDREG, NOP_CMD);
amd_write8(amd, CNTLREG2, EN_FEATURE|EN_SCSI2_CMD);
amd_write8(amd, CNTLREG3, FAST_CLK);
bval = EATER_25NS;
if (amd->eepromBuf[EE_MODE2] & ACTIVE_NEGATION) {
bval |= NEGATE_REQACKDATA;
}
amd_write8(amd, CNTLREG4, bval);
/* Disable SCSI bus reset interrupt */
amd_write8(amd, CNTLREG1, DIS_INT_ON_SCSI_RST);
return (amd);
}
/*
* attach and init a host adapter
*/
static void
amd_attach(pcici_t config_id, int unit)
{
struct cam_devq *devq; /* Device Queue to use for this SIM */
u_int8_t intstat;
u_int32_t wlval;
struct amd_softc *amd = NULL;
wlval = pci_conf_read(config_id, PCI_ID_REG);
if (wlval == PCI_DEVICE_ID_AMD53C974) {
if ((amd = amd_init(unit, config_id)) == NULL)
return;
/* Reset Pending INT */
intstat = amd_read8(amd, INTSTATREG);
}
/* After setting up the adapter, map our interrupt */
if (!pci_map_int(config_id, amd_intr, amd, &cam_imask)) {
if (bootverbose)
printf("amd%d: unable to register interrupt handler!\n",
unit);
free(amd, M_DEVBUF);
return;
}
/*
* Now let the CAM generic SCSI layer find the SCSI devices on
* the bus * start queue to reset to the idle loop. *
* Create device queue of SIM(s) * (MAX_START_JOB - 1) :
* max_sim_transactions
*/
devq = cam_simq_alloc(MAX_START_JOB);
if (devq == NULL) {
free(amd, M_DEVBUF);
return;
}
amd->psim = cam_sim_alloc(amd_action, amd_poll, "amd",
amd, amd->unit, 1, MAX_TAGS_CMD_QUEUE,
devq);
if (amd->psim == NULL) {
cam_simq_free(devq);
free(amd, M_DEVBUF);
return;
}
if (xpt_bus_register(amd->psim, 0) != CAM_SUCCESS) {
cam_sim_free(amd->psim, /*free_devq*/TRUE);
free(amd, M_DEVBUF);
return;
}
if (xpt_create_path(&amd->ppath, /* periph */ NULL,
cam_sim_path(amd->psim), CAM_TARGET_WILDCARD,
CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
xpt_bus_deregister(cam_sim_path(amd->psim));
cam_sim_free(amd->psim, /* free_simq */ TRUE);
free(amd, M_DEVBUF);
return;
}
}
static const char *
amd_probe(pcici_t tag, pcidi_t type)
{
if (type == PCI_DEVICE_ID_AMD53C974) {
return ("Tekram DC390(T)/AMD53c974 SCSI Host Adapter");
} else {
return (NULL);
}
}
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