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9deea8574e
freebsd/sys/dev/advansys/adwcam.c
Kenneth D. Merry 9deea8574e Add a number of interrelated CAM feature enhancements and bug fixes. 
NOTE:  These changes will require recompilation of any userland
applications, like cdrecord, xmcd, etc., that use the CAM passthrough
interface.  A make world is recommended.

camcontrol.[c8]:
 - We now support two new commands, "tags" and "negotiate".

	- The tags commands allows users to view the number of tagged
	  openings for a device as well as a number of other related
	  parameters, and it allows users to set tagged openings for
	  a device.

	- The negotiate command allows users to enable and disable
	  disconnection and tagged queueing, set sync rates, offsets
	  and bus width.  Note that not all of those features are
	  available for all controllers.  Only the adv, ahc, and ncr
	  drivers fully support all of the features at this point.
	  Some cards do not allow the setting of sync rates, offsets and
	  the like, and some of the drivers don't have any facilities to
	  do so.  Some drivers, like the adw driver, only support enabling
	  or disabling sync negotiation, but do not support setting sync
	  rates.

 - new description in the camcontrol man page of how to format a disk
 - cleanup of the camcontrol inquiry command
 - add support in the 'devlist' command for skipping unconfigured devices if
   -v was not specified on the command line.
 - make use of the new base_transfer_speed in the path inquiry CCB.
 - fix CCB bzero cases

cam_xpt.c, cam_sim.[ch], cam_ccb.h:

 - new flags on many CCB function codes to designate whether they're
   non-immediate, use a user-supplied CCB, and can only be passed from
   userland programs via the xpt device.  Use these flags in the transport
   layer and pass driver to categorize CCBs.

 - new flag in the transport layer device matching code for device nodes
   that indicates whether a device is unconfigured

 - bump the CAM version from 0x10 to 0x11

 - Change the CAM ioctls to use the version as their group code, so we can
   force users to recompile code even when the CCB size doesn't change.

 - add + fill in a new value in the path inquiry CCB, base_transfer_speed.
   Remove a corresponding field from the cam_sim structure, and add code to
   every SIM to set this field to the proper value.

 - Fix the set transfer settings code in the transport layer.

scsi_cd.c:

 - make some variables volatile instead of just casting them in various
   places
 - fix a race condition in the changer code
 - attach unless we get a "logical unit not supported" error.  This should
   fix all of the cases where people have devices that return weird errors
   when they don't have media in the drive.

scsi_da.c:

 - attach unless we get a "logical unit not supported" error

scsi_pass.c:

 - for immediate CCBs, just malloc a CCB to send the user request in.  This
   gets rid of the 'held' count problem in camcontrol tags.

scsi_pass.h:

 - change the CAM ioctls to use the CAM version as their group code.

adv driver:

 - Allow changing the sync rate and offset separately.

adw driver

 - Allow changing the sync rate and offset separately.

aha driver:

 - Don't return CAM_REQ_CMP for SET_TRAN_SETTINGS CCBs.

ahc driver:

 - Allow setting offset and sync rate separately

bt driver:

 - Don't return CAM_REQ_CMP for SET_TRAN_SETTINGS CCBs.

NCR driver:

 - Fix the ultra/ultra 2 negotiation bug
 - allow setting both the sync rate and offset separately

Other HBA drivers:
 - Put code in to set the base_transfer_speed field for
   XPT_GET_TRAN_SETTINGS CCBs.

Reviewed by:	gibbs, mjacob (isp), imp (aha)
1999-05-06 20:16:39 +00:00

1371 lines
35 KiB
C
Raw Blame History

/*
* CAM SCSI interface for the the Advanced Systems Inc.
* Second Generation SCSI controllers.
*
* Product specific probe and attach routines can be found in:
*
* pci/adw_pci.c ABP940UW
*
* Copyright (c) 1998 Justin Gibbs.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification, immediately at the beginning of the file.
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: adwcam.c,v 1.2 1998/10/15 23:47:14 gibbs Exp $
*/
/*
* Ported from:
* advansys.c - Linux Host Driver for AdvanSys SCSI Adapters
*
* Copyright (c) 1995-1998 Advanced System Products, Inc.
* All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that redistributions of source
* code retain the above copyright notice and this comment without
* modification.
*/
#include <stddef.h> /* For offsetof */
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <machine/bus_pio.h>
#include <machine/bus_memio.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_message.h>
#include <dev/advansys/adwvar.h>
/* Definitions for our use of the SIM private CCB area */
#define ccb_acb_ptr spriv_ptr0
#define ccb_adw_ptr spriv_ptr1
#define MIN(a, b) (((a) < (b)) ? (a) : (b))
u_long adw_unit;
static __inline u_int32_t acbvtop(struct adw_softc *adw,
struct acb *acb);
static __inline struct acb * acbptov(struct adw_softc *adw,
u_int32_t busaddr);
static __inline struct acb* adwgetacb(struct adw_softc *adw);
static __inline void adwfreeacb(struct adw_softc *adw,
struct acb *acb);
static void adwmapmem(void *arg, bus_dma_segment_t *segs,
int nseg, int error);
static struct sg_map_node*
adwallocsgmap(struct adw_softc *adw);
static int adwallocacbs(struct adw_softc *adw);
static void adwexecuteacb(void *arg, bus_dma_segment_t *dm_segs,
int nseg, int error);
static void adw_action(struct cam_sim *sim, union ccb *ccb);
static void adw_poll(struct cam_sim *sim);
static void adw_async(void *callback_arg, u_int32_t code,
struct cam_path *path, void *arg);
static void adwprocesserror(struct adw_softc *adw, struct acb *acb);
static void adwtimeout(void *arg);
static void adw_handle_device_reset(struct adw_softc *adw,
u_int target);
static void adw_handle_bus_reset(struct adw_softc *adw,
int initiated);
static __inline u_int32_t
acbvtop(struct adw_softc *adw, struct acb *acb)
{
return (adw->acb_busbase
+ (u_int32_t)((caddr_t)acb - (caddr_t)adw->acbs));
}
static __inline struct acb *
acbptov(struct adw_softc *adw, u_int32_t busaddr)
{
return (adw->acbs
+ ((struct acb *)busaddr - (struct acb *)adw->acb_busbase));
}
static __inline struct acb*
adwgetacb(struct adw_softc *adw)
{
struct acb* acb;
int s;
s = splcam();
if ((acb = SLIST_FIRST(&adw->free_acb_list)) != NULL) {
SLIST_REMOVE_HEAD(&adw->free_acb_list, links);
} else if (adw->num_acbs < adw->max_acbs) {
adwallocacbs(adw);
acb = SLIST_FIRST(&adw->free_acb_list);
if (acb == NULL)
printf("%s: Can't malloc ACB\n", adw_name(adw));
else {
SLIST_REMOVE_HEAD(&adw->free_acb_list, links);
}
}
splx(s);
return (acb);
}
static __inline void
adwfreeacb(struct adw_softc *adw, struct acb *acb)
{
int s;
s = splcam();
if ((acb->state & ACB_ACTIVE) != 0)
LIST_REMOVE(&acb->ccb->ccb_h, sim_links.le);
if ((acb->state & ACB_RELEASE_SIMQ) != 0)
acb->ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
else if ((adw->state & ADW_RESOURCE_SHORTAGE) != 0
&& (acb->ccb->ccb_h.status & CAM_RELEASE_SIMQ) == 0) {
acb->ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
adw->state &= ~ADW_RESOURCE_SHORTAGE;
}
acb->state = ACB_FREE;
SLIST_INSERT_HEAD(&adw->free_acb_list, acb, links);
splx(s);
}
static void
adwmapmem(void *arg, bus_dma_segment_t *segs, int nseg, int error)
{
bus_addr_t *busaddrp;
busaddrp = (bus_addr_t *)arg;
*busaddrp = segs->ds_addr;
}
static struct sg_map_node *
adwallocsgmap(struct adw_softc *adw)
{
struct sg_map_node *sg_map;
sg_map = malloc(sizeof(*sg_map), M_DEVBUF, M_NOWAIT);
if (sg_map == NULL)
return (NULL);
/* Allocate S/G space for the next batch of ACBS */
if (bus_dmamem_alloc(adw->sg_dmat, (void **)&sg_map->sg_vaddr,
BUS_DMA_NOWAIT, &sg_map->sg_dmamap) != 0) {
free(sg_map, M_DEVBUF);
return (NULL);
}
SLIST_INSERT_HEAD(&adw->sg_maps, sg_map, links);
bus_dmamap_load(adw->sg_dmat, sg_map->sg_dmamap, sg_map->sg_vaddr,
PAGE_SIZE, adwmapmem, &sg_map->sg_physaddr, /*flags*/0);
bzero(sg_map->sg_vaddr, PAGE_SIZE);
return (sg_map);
}
/*
* Allocate another chunk of CCB's. Return count of entries added.
* Assumed to be called at splcam().
*/
static int
adwallocacbs(struct adw_softc *adw)
{
struct acb *next_acb;
struct sg_map_node *sg_map;
bus_addr_t busaddr;
struct adw_sg_block *blocks;
int newcount;
int i;
next_acb = &adw->acbs[adw->num_acbs];
sg_map = adwallocsgmap(adw);
if (sg_map == NULL)
return (0);
blocks = sg_map->sg_vaddr;
busaddr = sg_map->sg_physaddr;
newcount = (PAGE_SIZE / (ADW_SG_BLOCKCNT * sizeof(*blocks)));
for (i = 0; adw->num_acbs < adw->max_acbs && i < newcount; i++) {
int error;
int j;
error = bus_dmamap_create(adw->buffer_dmat, /*flags*/0,
&next_acb->dmamap);
if (error != 0)
break;
next_acb->queue.scsi_req_baddr = acbvtop(adw, next_acb);
next_acb->queue.sense_addr =
acbvtop(adw, next_acb) + offsetof(struct acb, sense_data);
next_acb->sg_blocks = blocks;
next_acb->sg_busaddr = busaddr;
/* Setup static data in the sg blocks */
for (j = 0; j < ADW_SG_BLOCKCNT; j++) {
next_acb->sg_blocks[j].first_entry_no =
j * ADW_NO_OF_SG_PER_BLOCK;
}
next_acb->state = ACB_FREE;
SLIST_INSERT_HEAD(&adw->free_acb_list, next_acb, links);
blocks += ADW_SG_BLOCKCNT;
busaddr += ADW_SG_BLOCKCNT * sizeof(*blocks);
next_acb++;
adw->num_acbs++;
}
return (i);
}
static void
adwexecuteacb(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error)
{
struct acb *acb;
union ccb *ccb;
struct adw_softc *adw;
int s;
acb = (struct acb *)arg;
ccb = acb->ccb;
adw = (struct adw_softc *)ccb->ccb_h.ccb_adw_ptr;
if (error != 0) {
if (error != EFBIG)
printf("%s: Unexepected error 0x%x returned from "
"bus_dmamap_load\n", adw_name(adw), 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;
}
adwfreeacb(adw, acb);
xpt_done(ccb);
return;
}
if (nseg != 0) {
bus_dmasync_op_t op;
acb->queue.data_addr = dm_segs[0].ds_addr;
acb->queue.data_cnt = ccb->csio.dxfer_len;
if (nseg > 1) {
struct adw_sg_block *sg_block;
struct adw_sg_elm *sg;
bus_addr_t sg_busaddr;
u_int sg_index;
bus_dma_segment_t *end_seg;
end_seg = dm_segs + nseg;
sg_busaddr = acb->sg_busaddr;
sg_index = 0;
/* Copy the segments into our SG list */
for (sg_block = acb->sg_blocks;; sg_block++) {
u_int sg_left;
sg_left = ADW_NO_OF_SG_PER_BLOCK;
sg = sg_block->sg_list;
while (dm_segs < end_seg && sg_left != 0) {
sg->sg_addr = dm_segs->ds_addr;
sg->sg_count = dm_segs->ds_len;
sg++;
dm_segs++;
sg_left--;
}
sg_index += ADW_NO_OF_SG_PER_BLOCK - sg_left;
sg_block->last_entry_no = sg_index - 1;
if (dm_segs == end_seg) {
sg_block->sg_busaddr_next = 0;
break;
} else {
sg_busaddr +=
sizeof(struct adw_sg_block);
sg_block->sg_busaddr_next = sg_busaddr;
}
}
acb->queue.sg_entry_cnt = nseg;
acb->queue.sg_real_addr = acb->sg_busaddr;
} else {
acb->queue.sg_entry_cnt = 0;
acb->queue.sg_real_addr = 0;
}
if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
op = BUS_DMASYNC_PREREAD;
else
op = BUS_DMASYNC_PREWRITE;
bus_dmamap_sync(adw->buffer_dmat, acb->dmamap, op);
} else {
acb->queue.sg_entry_cnt = 0;
acb->queue.data_addr = 0;
acb->queue.data_cnt = 0;
acb->queue.sg_real_addr = 0;
}
acb->queue.free_scsiq_link = 0;
acb->queue.ux_wk_data_cnt = 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(adw->buffer_dmat, acb->dmamap);
adwfreeacb(adw, acb);
xpt_done(ccb);
splx(s);
return;
}
acb->state |= ACB_ACTIVE;
ccb->ccb_h.status |= CAM_SIM_QUEUED;
LIST_INSERT_HEAD(&adw->pending_ccbs, &ccb->ccb_h, sim_links.le);
ccb->ccb_h.timeout_ch =
timeout(adwtimeout, (caddr_t)acb,
(ccb->ccb_h.timeout * hz) / 1000);
adw_send_acb(adw, acb, acbvtop(adw, acb));
splx(s);
}
static void
adw_action(struct cam_sim *sim, union ccb *ccb)
{
struct adw_softc *adw;
CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("adw_action\n"));
adw = (struct adw_softc *)cam_sim_softc(sim);
switch (ccb->ccb_h.func_code) {
/* Common cases first */
case XPT_SCSI_IO: /* Execute the requested I/O operation */
{
struct ccb_scsiio *csio;
struct ccb_hdr *ccbh;
struct acb *acb;
csio = &ccb->csio;
ccbh = &ccb->ccb_h;
/* Max supported CDB length is 12 bytes */
if (csio->cdb_len > 12) {
ccb->ccb_h.status = CAM_REQ_INVALID;
xpt_done(ccb);
return;
}
if ((acb = adwgetacb(adw)) == NULL) {
int s;
s = splcam();
adw->state |= ADW_RESOURCE_SHORTAGE;
splx(s);
xpt_freeze_simq(sim, /*count*/1);
ccb->ccb_h.status = CAM_REQUEUE_REQ;
xpt_done(ccb);
return;
}
/* Link dccb and ccb so we can find one from the other */
acb->ccb = ccb;
ccb->ccb_h.ccb_acb_ptr = acb;
ccb->ccb_h.ccb_adw_ptr = adw;
acb->queue.cntl = 0;
acb->queue.target_id = ccb->ccb_h.target_id;
acb->queue.target_lun = ccb->ccb_h.target_lun;
acb->queue.srb_ptr = 0;
acb->queue.a_flag = 0;
acb->queue.sense_len =
MIN(csio->sense_len, sizeof(acb->sense_data));
acb->queue.cdb_len = csio->cdb_len;
if ((ccb->ccb_h.flags & CAM_TAG_ACTION_VALID) != 0)
acb->queue.tag_code = csio->tag_action;
else
acb->queue.tag_code = 0;
acb->queue.done_status = 0;
acb->queue.scsi_status = 0;
acb->queue.host_status = 0;
acb->queue.ux_sg_ix = 0;
if ((ccb->ccb_h.flags & CAM_CDB_POINTER) != 0) {
if ((ccb->ccb_h.flags & CAM_CDB_PHYS) == 0) {
bcopy(csio->cdb_io.cdb_ptr,
acb->queue.cdb, csio->cdb_len);
} else {
/* I guess I could map it in... */
ccb->ccb_h.status = CAM_REQ_INVALID;
adwfreeacb(adw, acb);
xpt_done(ccb);
return;
}
} else {
bcopy(csio->cdb_io.cdb_bytes,
acb->queue.cdb, csio->cdb_len);
}
/*
* If we have any data to send with this command,
* map it into bus space.
*/
if ((ccbh->flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
if ((ccbh->flags & CAM_SCATTER_VALID) == 0) {
/*
* We've been given a pointer
* to a single buffer.
*/
if ((ccbh->flags & CAM_DATA_PHYS) == 0) {
int s;
int error;
s = splsoftvm();
error =
bus_dmamap_load(adw->buffer_dmat,
acb->dmamap,
csio->data_ptr,
csio->dxfer_len,
adwexecuteacb,
acb, /*flags*/0);
if (error == EINPROGRESS) {
/*
* So as to maintain ordering,
* freeze the controller queue
* until our mapping is
* returned.
*/
xpt_freeze_simq(sim, 1);
acb->state |= CAM_RELEASE_SIMQ;
}
splx(s);
} else {
struct bus_dma_segment seg;
/* Pointer to physical buffer */
seg.ds_addr =
(bus_addr_t)csio->data_ptr;
seg.ds_len = csio->dxfer_len;
adwexecuteacb(acb, &seg, 1, 0);
}
} else {
struct bus_dma_segment *segs;
if ((ccbh->flags & CAM_DATA_PHYS) != 0)
panic("adw_action - Physical "
"segment pointers "
"unsupported");
if ((ccbh->flags&CAM_SG_LIST_PHYS)==0)
panic("adw_action - Virtual "
"segment addresses "
"unsupported");
/* Just use the segments provided */
segs = (struct bus_dma_segment *)csio->data_ptr;
adwexecuteacb(acb, segs, csio->sglist_cnt,
(csio->sglist_cnt < ADW_SGSIZE)
? 0 : EFBIG);
}
} else {
adwexecuteacb(acb, NULL, 0, 0);
}
break;
}
case XPT_RESET_DEV: /* Bus Device Reset the specified SCSI device */
{
adw_idle_cmd_status_t status;
adw_idle_cmd_send(adw, ADW_IDLE_CMD_DEVICE_RESET,
ccb->ccb_h.target_id);
status = adw_idle_cmd_wait(adw);
if (status == ADW_IDLE_CMD_SUCCESS) {
ccb->ccb_h.status = CAM_REQ_CMP;
if (bootverbose) {
xpt_print_path(ccb->ccb_h.path);
printf("BDR Delivered\n");
}
} else
ccb->ccb_h.status = CAM_REQ_CMP_ERR;
xpt_done(ccb);
break;
}
case XPT_ABORT: /* Abort the specified CCB */
/* XXX Implement */
ccb->ccb_h.status = CAM_REQ_INVALID;
xpt_done(ccb);
break;
case XPT_SET_TRAN_SETTINGS:
{
struct ccb_trans_settings *cts;
u_int target_mask;
int s;
cts = &ccb->cts;
target_mask = 0x01 << ccb->ccb_h.target_id;
s = splcam();
if ((cts->flags & CCB_TRANS_CURRENT_SETTINGS) != 0) {
if ((cts->valid & CCB_TRANS_DISC_VALID) != 0) {
u_int discenb;
discenb =
adw_lram_read_16(adw, ADW_MC_DISC_ENABLE);
if ((cts->flags & CCB_TRANS_DISC_ENB) != 0)
discenb |= target_mask;
else
discenb &= ~target_mask;
adw_lram_write_16(adw, ADW_MC_DISC_ENABLE,
discenb);
}
if ((cts->valid & CCB_TRANS_TQ_VALID) != 0) {
if ((cts->flags & CCB_TRANS_TAG_ENB) != 0)
adw->tagenb |= target_mask;
else
adw->tagenb &= ~target_mask;
}
if ((cts->valid & CCB_TRANS_BUS_WIDTH_VALID) != 0) {
u_int wdtrenb_orig;
u_int wdtrenb;
u_int wdtrdone;
wdtrenb_orig =
adw_lram_read_16(adw, ADW_MC_WDTR_ABLE);
wdtrenb = wdtrenb_orig;
wdtrdone = adw_lram_read_16(adw,
ADW_MC_WDTR_DONE);
switch (cts->bus_width) {
case MSG_EXT_WDTR_BUS_32_BIT:
case MSG_EXT_WDTR_BUS_16_BIT:
wdtrenb |= target_mask;
break;
case MSG_EXT_WDTR_BUS_8_BIT:
default:
wdtrenb &= ~target_mask;
break;
}
if (wdtrenb != wdtrenb_orig) {
adw_lram_write_16(adw,
ADW_MC_WDTR_ABLE,
wdtrenb);
wdtrdone &= ~target_mask;
adw_lram_write_16(adw,
ADW_MC_WDTR_DONE,
wdtrdone);
}
}
if (((cts->valid & CCB_TRANS_SYNC_RATE_VALID) != 0)
|| ((cts->valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0)) {
u_int sdtrenb_orig;
u_int sdtrenb;
u_int ultraenb_orig;
u_int ultraenb;
u_int sdtrdone;
sdtrenb_orig =
adw_lram_read_16(adw, ADW_MC_SDTR_ABLE);
sdtrenb = sdtrenb_orig;
ultraenb_orig =
adw_lram_read_16(adw, ADW_MC_ULTRA_ABLE);
ultraenb = ultraenb_orig;
sdtrdone = adw_lram_read_16(adw,
ADW_MC_SDTR_DONE);
if ((cts->valid
& CCB_TRANS_SYNC_RATE_VALID) != 0) {
if (cts->sync_period == 0) {
sdtrenb &= ~target_mask;
} else if (cts->sync_period > 12) {
ultraenb &= ~target_mask;
sdtrenb |= target_mask;
} else {
ultraenb |= target_mask;
sdtrenb |= target_mask;
}
}
if ((cts->valid
& CCB_TRANS_SYNC_OFFSET_VALID) != 0) {
if (cts->sync_offset == 0)
sdtrenb &= ~target_mask;
}
if (sdtrenb != sdtrenb_orig
|| ultraenb != ultraenb_orig) {
adw_lram_write_16(adw, ADW_MC_SDTR_ABLE,
sdtrenb);
adw_lram_write_16(adw,
ADW_MC_ULTRA_ABLE,
ultraenb);
sdtrdone &= ~target_mask;
adw_lram_write_16(adw, ADW_MC_SDTR_DONE,
sdtrdone);
}
}
}
splx(s);
ccb->ccb_h.status = CAM_REQ_CMP;
xpt_done(ccb);
break;
}
case XPT_GET_TRAN_SETTINGS:
/* Get default/user set transfer settings for the target */
{
struct ccb_trans_settings *cts;
u_int target_mask;
cts = &ccb->cts;
target_mask = 0x01 << ccb->ccb_h.target_id;
if ((cts->flags & CCB_TRANS_USER_SETTINGS) != 0) {
cts->flags = 0;
if ((adw->user_discenb & target_mask) != 0)
cts->flags |= CCB_TRANS_DISC_ENB;
if ((adw->user_tagenb & target_mask) != 0)
cts->flags |= CCB_TRANS_TAG_ENB;
if ((adw->user_wdtr & target_mask) != 0)
cts->bus_width = MSG_EXT_WDTR_BUS_16_BIT;
else
cts->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
if ((adw->user_sdtr & target_mask) != 0) {
if ((adw->user_ultra & target_mask) != 0)
cts->sync_period = 12; /* 20MHz */
else
cts->sync_period = 25; /* 10MHz */
cts->sync_offset = 15; /* XXX ??? */
}
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;
ccb->ccb_h.status = CAM_REQ_CMP;
} else {
u_int targ_tinfo;
cts->flags = 0;
if ((adw_lram_read_16(adw, ADW_MC_DISC_ENABLE)
& target_mask) != 0)
cts->flags |= CCB_TRANS_DISC_ENB;
if ((adw->tagenb & target_mask) != 0)
cts->flags |= CCB_TRANS_TAG_ENB;
targ_tinfo =
adw_lram_read_16(adw,
ADW_MC_DEVICE_HSHK_CFG_TABLE
+ (2 * ccb->ccb_h.target_id));
if ((targ_tinfo & ADW_HSHK_CFG_WIDE_XFR) != 0)
cts->bus_width = MSG_EXT_WDTR_BUS_16_BIT;
else
cts->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
cts->sync_period =
ADW_HSHK_CFG_PERIOD_FACTOR(targ_tinfo);
cts->sync_offset = targ_tinfo & ADW_HSHK_CFG_OFFSET;
if (cts->sync_period == 0)
cts->sync_offset = 0;
if (cts->sync_offset == 0)
cts->sync_period = 0;
}
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;
ccb->ccb_h.status = CAM_REQ_CMP;
xpt_done(ccb);
break;
}
case XPT_CALC_GEOMETRY:
{
struct ccb_calc_geometry *ccg;
u_int32_t size_mb;
u_int32_t secs_per_cylinder;
int extended;
/*
* XXX Use Adaptec translation until I find out how to
* get this information from the card.
*/
ccg = &ccb->ccg;
size_mb = ccg->volume_size
/ ((1024L * 1024L) / ccg->block_size);
extended = 1;
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;
ccb->ccb_h.status = CAM_REQ_CMP;
xpt_done(ccb);
break;
}
case XPT_RESET_BUS: /* Reset the specified SCSI bus */
{
adw_idle_cmd_status_t status;
adw_idle_cmd_send(adw, ADW_IDLE_CMD_SCSI_RESET, /*param*/0);
status = adw_idle_cmd_wait(adw);
if (status == ADW_IDLE_CMD_SUCCESS) {
ccb->ccb_h.status = CAM_REQ_CMP;
if (bootverbose) {
xpt_print_path(adw->path);
printf("Bus Reset Delivered\n");
}
} else
ccb->ccb_h.status = CAM_REQ_CMP_ERR;
xpt_done(ccb);
break;
}
case XPT_TERM_IO: /* Terminate the I/O process */
/* XXX Implement */
ccb->ccb_h.status = CAM_REQ_INVALID;
xpt_done(ccb);
break;
case XPT_PATH_INQ: /* Path routing inquiry */
{
struct ccb_pathinq *cpi = &ccb->cpi;
cpi->version_num = 1;
cpi->hba_inquiry = PI_WIDE_16|PI_SDTR_ABLE|PI_TAG_ABLE;
cpi->target_sprt = 0;
cpi->hba_misc = 0;
cpi->hba_eng_cnt = 0;
cpi->max_target = ADW_MAX_TID;
cpi->max_lun = ADW_MAX_LUN;
cpi->initiator_id = adw->initiator_id;
cpi->bus_id = cam_sim_bus(sim);
cpi->base_transfer_speed = 3300;
strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
strncpy(cpi->hba_vid, "AdvanSys", HBA_IDLEN);
strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
cpi->unit_number = cam_sim_unit(sim);
cpi->ccb_h.status = CAM_REQ_CMP;
xpt_done(ccb);
break;
}
default:
ccb->ccb_h.status = CAM_REQ_INVALID;
xpt_done(ccb);
break;
}
}
static void
adw_poll(struct cam_sim *sim)
{
adw_intr(cam_sim_softc(sim));
}
static void
adw_async(void *callback_arg, u_int32_t code, struct cam_path *path, void *arg)
{
}
struct adw_softc *
adw_alloc(int unit, bus_space_tag_t tag, bus_space_handle_t bsh)
{
struct adw_softc *adw;
int i;
/*
* Allocate a storage area for us
*/
adw = malloc(sizeof(struct adw_softc), M_DEVBUF, M_NOWAIT);
if (adw == NULL) {
printf("adw%d: cannot malloc!\n", unit);
return NULL;
}
bzero(adw, sizeof(struct adw_softc));
LIST_INIT(&adw->pending_ccbs);
SLIST_INIT(&adw->sg_maps);
adw->unit = unit;
adw->tag = tag;
adw->bsh = bsh;
i = adw->unit / 10;
adw->name = malloc(sizeof("adw") + i + 1, M_DEVBUF, M_NOWAIT);
if (adw->name == NULL) {
printf("adw%d: cannot malloc name!\n", unit);
free(adw, M_DEVBUF);
return NULL;
}
sprintf(adw->name, "adw%d", adw->unit);
return(adw);
}
void
adw_free(struct adw_softc *adw)
{
switch (adw->init_level) {
case 6:
{
struct sg_map_node *sg_map;
while ((sg_map = SLIST_FIRST(&adw->sg_maps)) != NULL) {
SLIST_REMOVE_HEAD(&adw->sg_maps, links);
bus_dmamap_unload(adw->sg_dmat,
sg_map->sg_dmamap);
bus_dmamem_free(adw->sg_dmat, sg_map->sg_vaddr,
sg_map->sg_dmamap);
free(sg_map, M_DEVBUF);
}
bus_dma_tag_destroy(adw->sg_dmat);
}
case 5:
bus_dmamap_unload(adw->acb_dmat, adw->acb_dmamap);
case 4:
bus_dmamem_free(adw->acb_dmat, adw->acbs,
adw->acb_dmamap);
bus_dmamap_destroy(adw->acb_dmat, adw->acb_dmamap);
case 3:
bus_dma_tag_destroy(adw->acb_dmat);
case 2:
bus_dma_tag_destroy(adw->buffer_dmat);
case 1:
bus_dma_tag_destroy(adw->parent_dmat);
case 0:
break;
}
free(adw->name, M_DEVBUF);
free(adw, M_DEVBUF);
}
int
adw_init(struct adw_softc *adw)
{
struct adw_eeprom eep_config;
u_int16_t checksum;
u_int16_t scsicfg1;
adw_reset_chip(adw);
checksum = adw_eeprom_read(adw, &eep_config);
bcopy(eep_config.serial_number, adw->serial_number,
sizeof(adw->serial_number));
if (checksum != eep_config.checksum) {
u_int16_t serial_number[3];
printf("%s: EEPROM checksum failed. Restoring Defaults\n",
adw_name(adw));
/*
* Restore the default EEPROM settings.
* Assume the 6 byte board serial number that was read
* from EEPROM is correct even if the EEPROM checksum
* failed.
*/
bcopy(&adw_default_eeprom, &eep_config, sizeof(eep_config));
bcopy(adw->serial_number, eep_config.serial_number,
sizeof(serial_number));
adw_eeprom_write(adw, &eep_config);
}
/* Pull eeprom information into our softc. */
adw->bios_ctrl = eep_config.bios_ctrl;
adw->user_wdtr = eep_config.wdtr_able;
adw->user_sdtr = eep_config.sdtr_able;
adw->user_ultra = eep_config.ultra_able;
adw->user_tagenb = eep_config.tagqng_able;
adw->user_discenb = eep_config.disc_enable;
adw->max_acbs = eep_config.max_host_qng;
adw->initiator_id = (eep_config.adapter_scsi_id & ADW_MAX_TID);
/*
* Sanity check the number of host openings.
*/
if (adw->max_acbs > ADW_DEF_MAX_HOST_QNG)
adw->max_acbs = ADW_DEF_MAX_HOST_QNG;
else if (adw->max_acbs < ADW_DEF_MIN_HOST_QNG) {
/* If the value is zero, assume it is uninitialized. */
if (adw->max_acbs == 0)
adw->max_acbs = ADW_DEF_MAX_HOST_QNG;
else
adw->max_acbs = ADW_DEF_MIN_HOST_QNG;
}
scsicfg1 = 0;
switch (eep_config.termination) {
default:
printf("%s: Invalid EEPROM Termination Settings.\n",
adw_name(adw));
printf("%s: Reverting to Automatic Termination\n",
adw_name(adw));
/* FALLTHROUGH */
case ADW_EEPROM_TERM_AUTO:
break;
case ADW_EEPROM_TERM_BOTH_ON:
scsicfg1 |= ADW_SCSI_CFG1_TERM_CTL_L;
/* FALLTHROUGH */
case ADW_EEPROM_TERM_HIGH_ON:
scsicfg1 |= ADW_SCSI_CFG1_TERM_CTL_H;
/* FALLTHROUGH */
case ADW_EEPROM_TERM_OFF:
scsicfg1 |= ADW_SCSI_CFG1_TERM_CTL_MANUAL;
break;
}
printf("%s: SCSI ID %d, ", adw_name(adw), adw->initiator_id);
if (adw_init_chip(adw, scsicfg1) != 0)
return (-1);
printf("Queue Depth %d\n", adw->max_acbs);
/* DMA tag for mapping buffers into device visible space. */
if (bus_dma_tag_create(adw->parent_dmat, /*alignment*/0, /*boundary*/0,
/*lowaddr*/BUS_SPACE_MAXADDR,
/*highaddr*/BUS_SPACE_MAXADDR,
/*filter*/NULL, /*filterarg*/NULL,
/*maxsize*/MAXBSIZE, /*nsegments*/ADW_SGSIZE,
/*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
/*flags*/BUS_DMA_ALLOCNOW,
&adw->buffer_dmat) != 0) {
return (-1);
}
adw->init_level++;
/* DMA tag for our ccb structures */
if (bus_dma_tag_create(adw->parent_dmat, /*alignment*/0, /*boundary*/0,
/*lowaddr*/BUS_SPACE_MAXADDR,
/*highaddr*/BUS_SPACE_MAXADDR,
/*filter*/NULL, /*filterarg*/NULL,
adw->max_acbs * sizeof(struct acb),
/*nsegments*/1,
/*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
/*flags*/0, &adw->acb_dmat) != 0) {
return (-1);
}
adw->init_level++;
/* Allocation for our ccbs */
if (bus_dmamem_alloc(adw->acb_dmat, (void **)&adw->acbs,
BUS_DMA_NOWAIT, &adw->acb_dmamap) != 0) {
return (-1);
}
adw->init_level++;
/* And permanently map them */
bus_dmamap_load(adw->acb_dmat, adw->acb_dmamap,
adw->acbs,
adw->max_acbs * sizeof(struct acb),
adwmapmem, &adw->acb_busbase, /*flags*/0);
/* Clear them out. */
bzero(adw->acbs, adw->max_acbs * sizeof(struct acb));
/* DMA tag for our S/G structures. We allocate in page sized chunks */
if (bus_dma_tag_create(adw->parent_dmat, /*alignment*/0, /*boundary*/0,
/*lowaddr*/BUS_SPACE_MAXADDR,
/*highaddr*/BUS_SPACE_MAXADDR,
/*filter*/NULL, /*filterarg*/NULL,
PAGE_SIZE, /*nsegments*/1,
/*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
/*flags*/0, &adw->sg_dmat) != 0) {
return (-1);
}
adw->init_level++;
/* Allocate our first batch of ccbs */
if (adwallocacbs(adw) == 0)
return (-1);
return (0);
}
/*
* Attach all the sub-devices we can find
*/
int
adw_attach(struct adw_softc *adw)
{
struct ccb_setasync csa;
struct cam_devq *devq;
/* Start the Risc processor now that we are fully configured. */
adw_outw(adw, ADW_RISC_CSR, ADW_RISC_CSR_RUN);
/*
* Create the device queue for our SIM.
*/
devq = cam_simq_alloc(adw->max_acbs);
if (devq == NULL)
return (0);
/*
* Construct our SIM entry.
*/
adw->sim = cam_sim_alloc(adw_action, adw_poll, "adw", adw, adw->unit,
1, adw->max_acbs, devq);
if (adw->sim == NULL)
return (0);
/*
* Register the bus.
*/
if (xpt_bus_register(adw->sim, 0) != CAM_SUCCESS) {
cam_sim_free(adw->sim, /*free devq*/TRUE);
return (0);
}
if (xpt_create_path(&adw->path, /*periph*/NULL, cam_sim_path(adw->sim),
CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD)
== CAM_REQ_CMP) {
xpt_setup_ccb(&csa.ccb_h, adw->path, /*priority*/5);
csa.ccb_h.func_code = XPT_SASYNC_CB;
csa.event_enable = AC_LOST_DEVICE;
csa.callback = adw_async;
csa.callback_arg = adw;
xpt_action((union ccb *)&csa);
}
return (0);
}
void
adw_intr(void *arg)
{
struct adw_softc *adw;
u_int int_stat;
u_int next_doneq;
u_int next_completeq;
u_int doneq_start;
adw = (struct adw_softc *)arg;
if ((adw_inw(adw, ADW_CTRL_REG) & ADW_CTRL_REG_HOST_INTR) == 0)
return;
/* Reading the register clears the interrupt. */
int_stat = adw_inb(adw, ADW_INTR_STATUS_REG);
if ((int_stat & ADW_INTR_STATUS_INTRB) != 0) {
/* Idle Command Complete */
adw->idle_command_cmp = 1;
switch (adw->idle_cmd) {
case ADW_IDLE_CMD_DEVICE_RESET:
adw_handle_device_reset(adw,
/*target*/adw->idle_cmd_param);
break;
case ADW_IDLE_CMD_SCSI_RESET:
adw_handle_bus_reset(adw, /*initiated*/TRUE);
break;
default:
break;
}
adw->idle_cmd = ADW_IDLE_CMD_COMPLETED;
}
if ((int_stat & ADW_INTR_STATUS_INTRC) != 0) {
/* SCSI Bus Reset */
adw_handle_bus_reset(adw, /*initiated*/FALSE);
}
/*
* ADW_MC_HOST_NEXT_DONE is actually the last completed RISC
* Queue List request. Its forward pointer (RQL_FWD) points to the
* current completed RISC Queue List request.
*/
next_doneq = adw_lram_read_8(adw, ADW_MC_HOST_NEXT_DONE);
next_doneq = ADW_MC_RISC_Q_LIST_BASE + RQL_FWD
+ (next_doneq * ADW_MC_RISC_Q_LIST_SIZE);
next_completeq = adw_lram_read_8(adw, next_doneq);
doneq_start = ADW_MC_NULL_Q;
/* Loop until all completed Q's are processed. */
while (next_completeq != ADW_MC_NULL_Q) {
u_int32_t acb_busaddr;
struct acb *acb;
union ccb *ccb;
doneq_start = next_completeq;
next_doneq = ADW_MC_RISC_Q_LIST_BASE +
(next_completeq * ADW_MC_RISC_Q_LIST_SIZE);
/*
* Read the ADW_SCSI_REQ_Q physical address pointer from
* the RISC list entry.
*/
acb_busaddr = adw_lram_read_32(adw, next_doneq + RQL_PHYADDR);
acb = acbptov(adw, acb_busaddr);
/* Change the RISC Queue List state to free. */
adw_lram_write_8(adw, next_doneq + RQL_STATE, ADW_MC_QS_FREE);
/* Get the RISC Queue List forward pointer. */
next_completeq = adw_lram_read_8(adw, next_doneq + RQL_FWD);
/* Process CCB */
ccb = acb->ccb;
untimeout(adwtimeout, acb, ccb->ccb_h.timeout_ch);
if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
bus_dmasync_op_t op;
if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
op = BUS_DMASYNC_POSTREAD;
else
op = BUS_DMASYNC_POSTWRITE;
bus_dmamap_sync(adw->buffer_dmat, acb->dmamap, op);
bus_dmamap_unload(adw->buffer_dmat, acb->dmamap);
ccb->csio.resid = acb->queue.data_cnt;
} else
ccb->csio.resid = 0;
/* Common Cases inline... */
if (acb->queue.host_status == QHSTA_NO_ERROR
&& (acb->queue.done_status == QD_NO_ERROR
|| acb->queue.done_status == QD_WITH_ERROR)) {
ccb->csio.scsi_status = acb->queue.scsi_status;
ccb->ccb_h.status = 0;
switch (ccb->csio.scsi_status) {
case SCSI_STATUS_OK:
ccb->ccb_h.status |= CAM_REQ_CMP;
break;
case SCSI_STATUS_CHECK_COND:
case SCSI_STATUS_CMD_TERMINATED:
bcopy(&acb->sense_data, &ccb->csio.sense_data,
ccb->csio.sense_len);
ccb->ccb_h.status |= CAM_AUTOSNS_VALID;
ccb->csio.sense_resid = acb->queue.sense_len;
/* FALLTHROUGH */
default:
ccb->ccb_h.status |= CAM_SCSI_STATUS_ERROR
| CAM_DEV_QFRZN;
xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
break;
}
adwfreeacb(adw, acb);
xpt_done(ccb);
} else {
adwprocesserror(adw, acb);
}
}
if (doneq_start != ADW_MC_NULL_Q)
adw_lram_write_8(adw, ADW_MC_HOST_NEXT_DONE, doneq_start);
}
static void
adwprocesserror(struct adw_softc *adw, struct acb *acb)
{
union ccb *ccb;
ccb = acb->ccb;
if (acb->queue.done_status == QD_ABORTED_BY_HOST) {
ccb->ccb_h.status = CAM_REQ_ABORTED;
} else {
switch (acb->queue.host_status) {
case QHSTA_M_SEL_TIMEOUT:
ccb->ccb_h.status = CAM_SEL_TIMEOUT;
break;
case QHSTA_M_SXFR_OFF_UFLW:
case QHSTA_M_SXFR_OFF_OFLW:
case QHSTA_M_DATA_OVER_RUN:
ccb->ccb_h.status = CAM_DATA_RUN_ERR;
break;
case QHSTA_M_SXFR_DESELECTED:
case QHSTA_M_UNEXPECTED_BUS_FREE:
ccb->ccb_h.status = CAM_UNEXP_BUSFREE;
break;
case QHSTA_M_QUEUE_ABORTED:
/* BDR or Bus Reset */
ccb->ccb_h.status = adw->last_reset;
break;
case QHSTA_M_SXFR_SDMA_ERR:
case QHSTA_M_SXFR_SXFR_PERR:
case QHSTA_M_RDMA_PERR:
ccb->ccb_h.status = CAM_UNCOR_PARITY;
break;
case QHSTA_M_WTM_TIMEOUT:
case QHSTA_M_SXFR_WD_TMO:
/* The SCSI bus hung in a phase */
ccb->ccb_h.status = CAM_SEQUENCE_FAIL;
adw_idle_cmd_send(adw, ADW_IDLE_CMD_SCSI_RESET,
/*param*/0);
break;
case QHSTA_M_SXFR_XFR_PH_ERR:
ccb->ccb_h.status = CAM_SEQUENCE_FAIL;
break;
case QHSTA_M_SXFR_UNKNOWN_ERROR:
break;
case QHSTA_M_BAD_CMPL_STATUS_IN:
/* No command complete after a status message */
ccb->ccb_h.status = CAM_SEQUENCE_FAIL;
break;
case QHSTA_M_AUTO_REQ_SENSE_FAIL:
ccb->ccb_h.status = CAM_AUTOSENSE_FAIL;
break;
case QHSTA_M_INVALID_DEVICE:
ccb->ccb_h.status = CAM_PATH_INVALID;
break;
case QHSTA_M_NO_AUTO_REQ_SENSE:
/*
* User didn't request sense, but we got a
* check condition.
*/
ccb->csio.scsi_status = acb->queue.scsi_status;
ccb->ccb_h.status = CAM_SCSI_STATUS_ERROR;
break;
default:
panic("%s: Unhandled Host status error %x",
adw_name(adw), acb->queue.host_status);
/* NOTREACHED */
}
}
if (ccb->ccb_h.status != CAM_REQ_CMP) {
xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
ccb->ccb_h.status |= CAM_DEV_QFRZN;
}
adwfreeacb(adw, acb);
xpt_done(ccb);
}
static void
adwtimeout(void *arg)
{
struct acb *acb;
union ccb *ccb;
struct adw_softc *adw;
adw_idle_cmd_status_t status;
int s;
acb = (struct acb *)arg;
ccb = acb->ccb;
adw = (struct adw_softc *)ccb->ccb_h.ccb_adw_ptr;
xpt_print_path(ccb->ccb_h.path);
printf("ACB %p - timed out\n", (void *)acb);
s = splcam();
if ((acb->state & ACB_ACTIVE) == 0) {
xpt_print_path(ccb->ccb_h.path);
printf("ACB %p - timed out CCB already completed\n",
(void *)acb);
splx(s);
return;
}
/* Attempt a BDR first */
adw_idle_cmd_send(adw, ADW_IDLE_CMD_DEVICE_RESET,
ccb->ccb_h.target_id);
splx(s);
status = adw_idle_cmd_wait(adw);
if (status == ADW_IDLE_CMD_SUCCESS) {
printf("%s: BDR Delivered. No longer in timeout\n",
adw_name(adw));
} else {
adw_idle_cmd_send(adw, ADW_IDLE_CMD_SCSI_RESET, /*param*/0);
status = adw_idle_cmd_wait(adw);
if (status != ADW_IDLE_CMD_SUCCESS)
panic("%s: Bus Reset during timeout failed",
adw_name(adw));
}
}
static void
adw_handle_device_reset(struct adw_softc *adw, u_int target)
{
struct cam_path *path;
cam_status error;
error = xpt_create_path(&path, /*periph*/NULL, cam_sim_path(adw->sim),
target, CAM_LUN_WILDCARD);
if (error == CAM_REQ_CMP) {
xpt_async(AC_SENT_BDR, path, NULL);
xpt_free_path(path);
}
adw->last_reset = CAM_BDR_SENT;
}
static void
adw_handle_bus_reset(struct adw_softc *adw, int initiated)
{
if (initiated) {
/*
* The microcode currently sets the SCSI Bus Reset signal
* while handling the AscSendIdleCmd() IDLE_CMD_SCSI_RESET
* command above. But the SCSI Bus Reset Hold Time in the
* microcode is not deterministic (it may in fact be for less
* than the SCSI Spec. minimum of 25 us). Therefore on return
* the Adv Library sets the SCSI Bus Reset signal for
* ADW_SCSI_RESET_HOLD_TIME_US, which is defined to be greater
* than 25 us.
*/
u_int scsi_ctrl;
scsi_ctrl = adw_inw(adw, ADW_SCSI_CTRL) & ~ADW_SCSI_CTRL_RSTOUT;
adw_outw(adw, ADW_SCSI_CTRL, scsi_ctrl | ADW_SCSI_CTRL_RSTOUT);
DELAY(ADW_SCSI_RESET_HOLD_TIME_US);
adw_outw(adw, ADW_SCSI_CTRL, scsi_ctrl);
/*
* We will perform the async notification when the
* SCSI Reset interrupt occurs.
*/
} else
xpt_async(AC_BUS_RESET, adw->path, NULL);
adw->last_reset = CAM_SCSI_BUS_RESET;
}
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