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227d67aa54
freebsd-nq/sys/cam/ata/ata_pmp.c
Alexander Motin 227d67aa54 Merge CAM locking changes from the projects/camlock branch to radically 
reduce lock congestion and improve SMP scalability of the SCSI/ATA stack,
preparing the ground for the coming next GEOM direct dispatch support.

Replace big per-SIM locks with bunch of smaller ones:
 - per-LUN locks to protect device and peripheral drivers state;
 - per-target locks to protect list of LUNs on target;
 - per-bus locks to protect reference counting;
 - per-send queue locks to protect queue of CCBs to be sent;
 - per-done queue locks to protect queue of completed CCBs;
 - remaining per-SIM locks now protect only HBA driver internals.

While holding LUN lock it is allowed (while not recommended for performance
reasons) to take SIM lock.  The opposite acquisition order is forbidden.
All the other locks are leaf locks, that can be taken anywhere, but should
not be cascaded.  Many functions, such as: xpt_action(), xpt_done(),
xpt_async(), xpt_create_path(), etc. are no longer require (but allow) SIM
lock to be held.

To keep compatibility and solve cases where SIM lock can't be dropped, all
xpt_async() calls in addition to xpt_done() calls are queued to completion
threads for async processing in clean environment without SIM lock held.

Instead of single CAM SWI thread, used for commands completion processing
before, use multiple (depending on number of CPUs) threads.  Load balanced
between them using "hash" of the device B:T:L address.

HBA drivers that can drop SIM lock during completion processing and have
sufficient number of completion threads to efficiently scale to multiple
CPUs can use new function xpt_done_direct() to avoid extra context switch.
Make ahci(4) driver to use this mechanism depending on hardware setup.

Sponsored by:	iXsystems, Inc.
MFC after:	2 months
2013-10-21 12:00:26 +00:00

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/*-
* Copyright (c) 2009 Alexander Motin <mav@FreeBSD.org>
* 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. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#ifdef _KERNEL
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bio.h>
#include <sys/sysctl.h>
#include <sys/taskqueue.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/conf.h>
#include <sys/devicestat.h>
#include <sys/eventhandler.h>
#include <sys/malloc.h>
#include <sys/cons.h>
#include <geom/geom_disk.h>
#endif /* _KERNEL */
#ifndef _KERNEL
#include <stdio.h>
#include <string.h>
#endif /* _KERNEL */
#include <cam/cam.h>
#include <cam/cam_ccb.h>
#include <cam/cam_periph.h>
#include <cam/cam_xpt_periph.h>
#include <cam/cam_xpt_internal.h>
#include <cam/cam_sim.h>
#include <cam/ata/ata_all.h>
#ifdef _KERNEL
typedef enum {
PMP_STATE_NORMAL,
PMP_STATE_PORTS,
PMP_STATE_PM_QUIRKS_1,
PMP_STATE_PM_QUIRKS_2,
PMP_STATE_PM_QUIRKS_3,
PMP_STATE_PRECONFIG,
PMP_STATE_RESET,
PMP_STATE_CONNECT,
PMP_STATE_CHECK,
PMP_STATE_CLEAR,
PMP_STATE_CONFIG,
PMP_STATE_SCAN
} pmp_state;
typedef enum {
PMP_FLAG_SCTX_INIT = 0x200
} pmp_flags;
typedef enum {
PMP_CCB_PROBE = 0x01,
} pmp_ccb_state;
/* Offsets into our private area for storing information */
#define ccb_state ppriv_field0
#define ccb_bp ppriv_ptr1
struct pmp_softc {
SLIST_ENTRY(pmp_softc) links;
pmp_state state;
pmp_flags flags;
uint32_t pm_pid;
uint32_t pm_prv;
int pm_ports;
int pm_step;
int pm_try;
int found;
int reset;
int frozen;
int restart;
int events;
#define PMP_EV_RESET 1
#define PMP_EV_RESCAN 2
u_int caps;
struct task sysctl_task;
struct sysctl_ctx_list sysctl_ctx;
struct sysctl_oid *sysctl_tree;
};
static periph_init_t pmpinit;
static void pmpasync(void *callback_arg, u_int32_t code,
struct cam_path *path, void *arg);
static void pmpsysctlinit(void *context, int pending);
static periph_ctor_t pmpregister;
static periph_dtor_t pmpcleanup;
static periph_start_t pmpstart;
static periph_oninv_t pmponinvalidate;
static void pmpdone(struct cam_periph *periph,
union ccb *done_ccb);
#ifndef PMP_DEFAULT_TIMEOUT
#define PMP_DEFAULT_TIMEOUT 30 /* Timeout in seconds */
#endif
#ifndef PMP_DEFAULT_RETRY
#define PMP_DEFAULT_RETRY 1
#endif
#ifndef PMP_DEFAULT_HIDE_SPECIAL
#define PMP_DEFAULT_HIDE_SPECIAL 1
#endif
static int pmp_retry_count = PMP_DEFAULT_RETRY;
static int pmp_default_timeout = PMP_DEFAULT_TIMEOUT;
static int pmp_hide_special = PMP_DEFAULT_HIDE_SPECIAL;
static SYSCTL_NODE(_kern_cam, OID_AUTO, pmp, CTLFLAG_RD, 0,
"CAM Direct Access Disk driver");
SYSCTL_INT(_kern_cam_pmp, OID_AUTO, retry_count, CTLFLAG_RW,
&pmp_retry_count, 0, "Normal I/O retry count");
TUNABLE_INT("kern.cam.pmp.retry_count", &pmp_retry_count);
SYSCTL_INT(_kern_cam_pmp, OID_AUTO, default_timeout, CTLFLAG_RW,
&pmp_default_timeout, 0, "Normal I/O timeout (in seconds)");
TUNABLE_INT("kern.cam.pmp.default_timeout", &pmp_default_timeout);
SYSCTL_INT(_kern_cam_pmp, OID_AUTO, hide_special, CTLFLAG_RW,
&pmp_hide_special, 0, "Hide extra ports");
TUNABLE_INT("kern.cam.pmp.hide_special", &pmp_hide_special);
static struct periph_driver pmpdriver =
{
pmpinit, "pmp",
TAILQ_HEAD_INITIALIZER(pmpdriver.units), /* generation */ 0,
CAM_PERIPH_DRV_EARLY
};
PERIPHDRIVER_DECLARE(pmp, pmpdriver);
static MALLOC_DEFINE(M_ATPMP, "ata_pmp", "ata_pmp buffers");
static void
pmpinit(void)
{
cam_status status;
/*
* Install a global async callback. This callback will
* receive async callbacks like "new device found".
*/
status = xpt_register_async(AC_FOUND_DEVICE, pmpasync, NULL, NULL);
if (status != CAM_REQ_CMP) {
printf("pmp: Failed to attach master async callback "
"due to status 0x%x!\n", status);
}
}
static void
pmpfreeze(struct cam_periph *periph, int mask)
{
struct pmp_softc *softc = (struct pmp_softc *)periph->softc;
struct cam_path *dpath;
int i;
mask &= ~softc->frozen;
for (i = 0; i < 15; i++) {
if ((mask & (1 << i)) == 0)
continue;
if (xpt_create_path(&dpath, periph,
xpt_path_path_id(periph->path),
i, 0) == CAM_REQ_CMP) {
softc->frozen |= (1 << i);
xpt_acquire_device(dpath->device);
cam_freeze_devq(dpath);
xpt_free_path(dpath);
}
}
}
static void
pmprelease(struct cam_periph *periph, int mask)
{
struct pmp_softc *softc = (struct pmp_softc *)periph->softc;
struct cam_path *dpath;
int i;
mask &= softc->frozen;
for (i = 0; i < 15; i++) {
if ((mask & (1 << i)) == 0)
continue;
if (xpt_create_path(&dpath, periph,
xpt_path_path_id(periph->path),
i, 0) == CAM_REQ_CMP) {
softc->frozen &= ~(1 << i);
cam_release_devq(dpath, 0, 0, 0, FALSE);
xpt_release_device(dpath->device);
xpt_free_path(dpath);
}
}
}
static void
pmponinvalidate(struct cam_periph *periph)
{
struct cam_path *dpath;
int i;
/*
* De-register any async callbacks.
*/
xpt_register_async(0, pmpasync, periph, periph->path);
for (i = 0; i < 15; i++) {
if (xpt_create_path(&dpath, periph,
xpt_path_path_id(periph->path),
i, 0) == CAM_REQ_CMP) {
xpt_async(AC_LOST_DEVICE, dpath, NULL);
xpt_free_path(dpath);
}
}
pmprelease(periph, -1);
}
static void
pmpcleanup(struct cam_periph *periph)
{
struct pmp_softc *softc;
softc = (struct pmp_softc *)periph->softc;
cam_periph_unlock(periph);
/*
* If we can't free the sysctl tree, oh well...
*/
if ((softc->flags & PMP_FLAG_SCTX_INIT) != 0
&& sysctl_ctx_free(&softc->sysctl_ctx) != 0) {
xpt_print(periph->path, "can't remove sysctl context\n");
}
free(softc, M_DEVBUF);
cam_periph_lock(periph);
}
static void
pmpasync(void *callback_arg, u_int32_t code,
struct cam_path *path, void *arg)
{
struct cam_periph *periph;
struct pmp_softc *softc;
periph = (struct cam_periph *)callback_arg;
switch (code) {
case AC_FOUND_DEVICE:
{
struct ccb_getdev *cgd;
cam_status status;
cgd = (struct ccb_getdev *)arg;
if (cgd == NULL)
break;
if (cgd->protocol != PROTO_SATAPM)
break;
/*
* Allocate a peripheral instance for
* this device and start the probe
* process.
*/
status = cam_periph_alloc(pmpregister, pmponinvalidate,
pmpcleanup, pmpstart,
"pmp", CAM_PERIPH_BIO,
path, pmpasync,
AC_FOUND_DEVICE, cgd);
if (status != CAM_REQ_CMP
&& status != CAM_REQ_INPROG)
printf("pmpasync: Unable to attach to new device "
"due to status 0x%x\n", status);
break;
}
case AC_SCSI_AEN:
case AC_SENT_BDR:
case AC_BUS_RESET:
softc = (struct pmp_softc *)periph->softc;
cam_periph_async(periph, code, path, arg);
if (code == AC_SCSI_AEN)
softc->events |= PMP_EV_RESCAN;
else
softc->events |= PMP_EV_RESET;
if (code == AC_SCSI_AEN && softc->state != PMP_STATE_NORMAL)
break;
xpt_hold_boot();
pmpfreeze(periph, softc->found);
if (code == AC_SENT_BDR || code == AC_BUS_RESET)
softc->found = 0; /* We have to reset everything. */
if (softc->state == PMP_STATE_NORMAL) {
if (cam_periph_acquire(periph) == CAM_REQ_CMP) {
if (softc->pm_pid == 0x37261095 ||
softc->pm_pid == 0x38261095)
softc->state = PMP_STATE_PM_QUIRKS_1;
else
softc->state = PMP_STATE_PRECONFIG;
xpt_schedule(periph, CAM_PRIORITY_DEV);
} else {
pmprelease(periph, softc->found);
xpt_release_boot();
}
} else
softc->restart = 1;
break;
default:
cam_periph_async(periph, code, path, arg);
break;
}
}
static void
pmpsysctlinit(void *context, int pending)
{
struct cam_periph *periph;
struct pmp_softc *softc;
char tmpstr[80], tmpstr2[80];
periph = (struct cam_periph *)context;
if (cam_periph_acquire(periph) != CAM_REQ_CMP)
return;
softc = (struct pmp_softc *)periph->softc;
snprintf(tmpstr, sizeof(tmpstr), "CAM PMP unit %d", periph->unit_number);
snprintf(tmpstr2, sizeof(tmpstr2), "%d", periph->unit_number);
sysctl_ctx_init(&softc->sysctl_ctx);
softc->flags |= PMP_FLAG_SCTX_INIT;
softc->sysctl_tree = SYSCTL_ADD_NODE(&softc->sysctl_ctx,
SYSCTL_STATIC_CHILDREN(_kern_cam_pmp), OID_AUTO, tmpstr2,
CTLFLAG_RD, 0, tmpstr);
if (softc->sysctl_tree == NULL) {
printf("pmpsysctlinit: unable to allocate sysctl tree\n");
cam_periph_release(periph);
return;
}
cam_periph_release(periph);
}
static cam_status
pmpregister(struct cam_periph *periph, void *arg)
{
struct pmp_softc *softc;
struct ccb_getdev *cgd;
cgd = (struct ccb_getdev *)arg;
if (cgd == NULL) {
printf("pmpregister: no getdev CCB, can't register device\n");
return(CAM_REQ_CMP_ERR);
}
softc = (struct pmp_softc *)malloc(sizeof(*softc), M_DEVBUF,
M_NOWAIT|M_ZERO);
if (softc == NULL) {
printf("pmpregister: Unable to probe new device. "
"Unable to allocate softc\n");
return(CAM_REQ_CMP_ERR);
}
periph->softc = softc;
softc->pm_pid = ((uint32_t *)&cgd->ident_data)[0];
softc->pm_prv = ((uint32_t *)&cgd->ident_data)[1];
TASK_INIT(&softc->sysctl_task, 0, pmpsysctlinit, periph);
xpt_announce_periph(periph, NULL);
/*
* Add async callbacks for bus reset and
* bus device reset calls. I don't bother
* checking if this fails as, in most cases,
* the system will function just fine without
* them and the only alternative would be to
* not attach the device on failure.
*/
xpt_register_async(AC_SENT_BDR | AC_BUS_RESET | AC_LOST_DEVICE |
AC_SCSI_AEN, pmpasync, periph, periph->path);
/*
* Take an exclusive refcount on the periph while pmpstart is called
* to finish the probe. The reference will be dropped in pmpdone at
* the end of probe.
*/
(void)cam_periph_acquire(periph);
xpt_hold_boot();
softc->state = PMP_STATE_PORTS;
softc->events = PMP_EV_RESCAN;
xpt_schedule(periph, CAM_PRIORITY_DEV);
return(CAM_REQ_CMP);
}
static void
pmpstart(struct cam_periph *periph, union ccb *start_ccb)
{
struct ccb_trans_settings cts;
struct ccb_ataio *ataio;
struct pmp_softc *softc;
struct cam_path *dpath;
int revision = 0;
softc = (struct pmp_softc *)periph->softc;
ataio = &start_ccb->ataio;
CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("pmpstart\n"));
if (softc->restart) {
softc->restart = 0;
if (softc->pm_pid == 0x37261095 || softc->pm_pid == 0x38261095)
softc->state = min(softc->state, PMP_STATE_PM_QUIRKS_1);
else
softc->state = min(softc->state, PMP_STATE_PRECONFIG);
}
/* Fetch user wanted device speed. */
if (softc->state == PMP_STATE_RESET ||
softc->state == PMP_STATE_CONNECT) {
if (xpt_create_path(&dpath, periph,
xpt_path_path_id(periph->path),
softc->pm_step, 0) == CAM_REQ_CMP) {
bzero(&cts, sizeof(cts));
xpt_setup_ccb(&cts.ccb_h, dpath, CAM_PRIORITY_NONE);
cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
cts.type = CTS_TYPE_USER_SETTINGS;
xpt_action((union ccb *)&cts);
if (cts.xport_specific.sata.valid & CTS_SATA_VALID_REVISION)
revision = cts.xport_specific.sata.revision;
xpt_free_path(dpath);
}
}
switch (softc->state) {
case PMP_STATE_PORTS:
cam_fill_ataio(ataio,
pmp_retry_count,
pmpdone,
/*flags*/CAM_DIR_NONE,
0,
/*data_ptr*/NULL,
/*dxfer_len*/0,
pmp_default_timeout * 1000);
ata_pm_read_cmd(ataio, 2, 15);
break;
case PMP_STATE_PM_QUIRKS_1:
case PMP_STATE_PM_QUIRKS_3:
cam_fill_ataio(ataio,
pmp_retry_count,
pmpdone,
/*flags*/CAM_DIR_NONE,
0,
/*data_ptr*/NULL,
/*dxfer_len*/0,
pmp_default_timeout * 1000);
ata_pm_read_cmd(ataio, 129, 15);
break;
case PMP_STATE_PM_QUIRKS_2:
cam_fill_ataio(ataio,
pmp_retry_count,
pmpdone,
/*flags*/CAM_DIR_NONE,
0,
/*data_ptr*/NULL,
/*dxfer_len*/0,
pmp_default_timeout * 1000);
ata_pm_write_cmd(ataio, 129, 15, softc->caps & ~0x1);
break;
case PMP_STATE_PRECONFIG:
/* Get/update host SATA capabilities. */
bzero(&cts, sizeof(cts));
xpt_setup_ccb(&cts.ccb_h, periph->path, CAM_PRIORITY_NONE);
cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
cts.type = CTS_TYPE_CURRENT_SETTINGS;
xpt_action((union ccb *)&cts);
if (cts.xport_specific.sata.valid & CTS_SATA_VALID_CAPS)
softc->caps = cts.xport_specific.sata.caps;
else
softc->caps = 0;
cam_fill_ataio(ataio,
pmp_retry_count,
pmpdone,
/*flags*/CAM_DIR_NONE,
0,
/*data_ptr*/NULL,
/*dxfer_len*/0,
pmp_default_timeout * 1000);
ata_pm_write_cmd(ataio, 0x60, 15, 0x0);
break;
case PMP_STATE_RESET:
cam_fill_ataio(ataio,
pmp_retry_count,
pmpdone,
/*flags*/CAM_DIR_NONE,
0,
/*data_ptr*/NULL,
/*dxfer_len*/0,
pmp_default_timeout * 1000);
ata_pm_write_cmd(ataio, 2, softc->pm_step,
(revision << 4) |
((softc->found & (1 << softc->pm_step)) ? 0 : 1));
break;
case PMP_STATE_CONNECT:
cam_fill_ataio(ataio,
pmp_retry_count,
pmpdone,
/*flags*/CAM_DIR_NONE,
0,
/*data_ptr*/NULL,
/*dxfer_len*/0,
pmp_default_timeout * 1000);
ata_pm_write_cmd(ataio, 2, softc->pm_step,
(revision << 4));
break;
case PMP_STATE_CHECK:
cam_fill_ataio(ataio,
pmp_retry_count,
pmpdone,
/*flags*/CAM_DIR_NONE,
0,
/*data_ptr*/NULL,
/*dxfer_len*/0,
pmp_default_timeout * 1000);
ata_pm_read_cmd(ataio, 0, softc->pm_step);
break;
case PMP_STATE_CLEAR:
softc->reset = 0;
cam_fill_ataio(ataio,
pmp_retry_count,
pmpdone,
/*flags*/CAM_DIR_NONE,
0,
/*data_ptr*/NULL,
/*dxfer_len*/0,
pmp_default_timeout * 1000);
ata_pm_write_cmd(ataio, 1, softc->pm_step, 0xFFFFFFFF);
break;
case PMP_STATE_CONFIG:
cam_fill_ataio(ataio,
pmp_retry_count,
pmpdone,
/*flags*/CAM_DIR_NONE,
0,
/*data_ptr*/NULL,
/*dxfer_len*/0,
pmp_default_timeout * 1000);
ata_pm_write_cmd(ataio, 0x60, 15, 0x07 |
((softc->caps & CTS_SATA_CAPS_H_AN) ? 0x08 : 0));
break;
default:
break;
}
xpt_action(start_ccb);
}
static void
pmpdone(struct cam_periph *periph, union ccb *done_ccb)
{
struct ccb_trans_settings cts;
struct pmp_softc *softc;
struct ccb_ataio *ataio;
struct cam_path *dpath;
u_int32_t priority, res;
int i;
softc = (struct pmp_softc *)periph->softc;
ataio = &done_ccb->ataio;
CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("pmpdone\n"));
priority = done_ccb->ccb_h.pinfo.priority;
if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
if (cam_periph_error(done_ccb, 0, 0, NULL) == ERESTART) {
return;
} else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
cam_release_devq(done_ccb->ccb_h.path,
/*relsim_flags*/0,
/*reduction*/0,
/*timeout*/0,
/*getcount_only*/0);
}
goto done;
}
if (softc->restart) {
softc->restart = 0;
xpt_release_ccb(done_ccb);
if (softc->pm_pid == 0x37261095 || softc->pm_pid == 0x38261095)
softc->state = min(softc->state, PMP_STATE_PM_QUIRKS_1);
else
softc->state = min(softc->state, PMP_STATE_PRECONFIG);
xpt_schedule(periph, priority);
return;
}
switch (softc->state) {
case PMP_STATE_PORTS:
softc->pm_ports = (ataio->res.lba_high << 24) +
(ataio->res.lba_mid << 16) +
(ataio->res.lba_low << 8) +
ataio->res.sector_count;
if (pmp_hide_special) {
/*
* This PMP declares 6 ports, while only 5 of them
* are real. Port 5 is a SEMB port, probing which
* causes timeouts if external SEP is not connected
* to PMP over I2C.
*/
if ((softc->pm_pid == 0x37261095 ||
softc->pm_pid == 0x38261095) &&
softc->pm_ports == 6)
softc->pm_ports = 5;
/*
* This PMP declares 7 ports, while only 5 of them
* are real. Port 5 is a fake "Config Disk" with
* 640 sectors size. Port 6 is a SEMB port.
*/
if (softc->pm_pid == 0x47261095 && softc->pm_ports == 7)
softc->pm_ports = 5;
/*
* These PMPs have extra configuration port.
*/
if (softc->pm_pid == 0x57231095 ||
softc->pm_pid == 0x57331095 ||
softc->pm_pid == 0x57341095 ||
softc->pm_pid == 0x57441095)
softc->pm_ports--;
}
printf("%s%d: %d fan-out ports\n",
periph->periph_name, periph->unit_number,
softc->pm_ports);
if (softc->pm_pid == 0x37261095 || softc->pm_pid == 0x38261095)
softc->state = PMP_STATE_PM_QUIRKS_1;
else
softc->state = PMP_STATE_PRECONFIG;
xpt_release_ccb(done_ccb);
xpt_schedule(periph, priority);
return;
case PMP_STATE_PM_QUIRKS_1:
softc->caps = (ataio->res.lba_high << 24) +
(ataio->res.lba_mid << 16) +
(ataio->res.lba_low << 8) +
ataio->res.sector_count;
if (softc->caps & 0x1)
softc->state = PMP_STATE_PM_QUIRKS_2;
else
softc->state = PMP_STATE_PRECONFIG;
xpt_release_ccb(done_ccb);
xpt_schedule(periph, priority);
return;
case PMP_STATE_PM_QUIRKS_2:
if (bootverbose)
softc->state = PMP_STATE_PM_QUIRKS_3;
else
softc->state = PMP_STATE_PRECONFIG;
xpt_release_ccb(done_ccb);
xpt_schedule(periph, priority);
return;
case PMP_STATE_PM_QUIRKS_3:
res = (ataio->res.lba_high << 24) +
(ataio->res.lba_mid << 16) +
(ataio->res.lba_low << 8) +
ataio->res.sector_count;
printf("%s%d: Disabling SiI3x26 R_OK in GSCR_POLL: %x->%x\n",
periph->periph_name, periph->unit_number, softc->caps, res);
softc->state = PMP_STATE_PRECONFIG;
xpt_release_ccb(done_ccb);
xpt_schedule(periph, priority);
return;
case PMP_STATE_PRECONFIG:
softc->pm_step = 0;
softc->state = PMP_STATE_RESET;
softc->reset |= ~softc->found;
xpt_release_ccb(done_ccb);
xpt_schedule(periph, priority);
return;
case PMP_STATE_RESET:
softc->pm_step++;
if (softc->pm_step >= softc->pm_ports) {
softc->pm_step = 0;
cam_freeze_devq(periph->path);
cam_release_devq(periph->path,
RELSIM_RELEASE_AFTER_TIMEOUT,
/*reduction*/0,
/*timeout*/5,
/*getcount_only*/0);
softc->state = PMP_STATE_CONNECT;
}
xpt_release_ccb(done_ccb);
xpt_schedule(periph, priority);
return;
case PMP_STATE_CONNECT:
softc->pm_step++;
if (softc->pm_step >= softc->pm_ports) {
softc->pm_step = 0;
softc->pm_try = 0;
cam_freeze_devq(periph->path);
cam_release_devq(periph->path,
RELSIM_RELEASE_AFTER_TIMEOUT,
/*reduction*/0,
/*timeout*/10,
/*getcount_only*/0);
softc->state = PMP_STATE_CHECK;
}
xpt_release_ccb(done_ccb);
xpt_schedule(periph, priority);
return;
case PMP_STATE_CHECK:
res = (ataio->res.lba_high << 24) +
(ataio->res.lba_mid << 16) +
(ataio->res.lba_low << 8) +
ataio->res.sector_count;
if (((res & 0xf0f) == 0x103 && (res & 0x0f0) != 0) ||
(res & 0x600) != 0) {
if (bootverbose) {
printf("%s%d: port %d status: %08x\n",
periph->periph_name, periph->unit_number,
softc->pm_step, res);
}
/* Report device speed if it is online. */
if ((res & 0xf0f) == 0x103 &&
xpt_create_path(&dpath, periph,
xpt_path_path_id(periph->path),
softc->pm_step, 0) == CAM_REQ_CMP) {
bzero(&cts, sizeof(cts));
xpt_setup_ccb(&cts.ccb_h, dpath, CAM_PRIORITY_NONE);
cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS;
cts.type = CTS_TYPE_CURRENT_SETTINGS;
cts.xport_specific.sata.revision = (res & 0x0f0) >> 4;
cts.xport_specific.sata.valid = CTS_SATA_VALID_REVISION;
cts.xport_specific.sata.caps = softc->caps &
(CTS_SATA_CAPS_H_PMREQ |
CTS_SATA_CAPS_H_DMAAA |
CTS_SATA_CAPS_H_AN);
cts.xport_specific.sata.valid |= CTS_SATA_VALID_CAPS;
xpt_action((union ccb *)&cts);
xpt_free_path(dpath);
}
softc->found |= (1 << softc->pm_step);
softc->pm_step++;
} else {
if (softc->pm_try < 10) {
cam_freeze_devq(periph->path);
cam_release_devq(periph->path,
RELSIM_RELEASE_AFTER_TIMEOUT,
/*reduction*/0,
/*timeout*/10,
/*getcount_only*/0);
softc->pm_try++;
} else {
if (bootverbose) {
printf("%s%d: port %d status: %08x\n",
periph->periph_name, periph->unit_number,
softc->pm_step, res);
}
softc->found &= ~(1 << softc->pm_step);
if (xpt_create_path(&dpath, periph,
done_ccb->ccb_h.path_id,
softc->pm_step, 0) == CAM_REQ_CMP) {
xpt_async(AC_LOST_DEVICE, dpath, NULL);
xpt_free_path(dpath);
}
softc->pm_step++;
}
}
if (softc->pm_step >= softc->pm_ports) {
if (softc->reset & softc->found) {
cam_freeze_devq(periph->path);
cam_release_devq(periph->path,
RELSIM_RELEASE_AFTER_TIMEOUT,
/*reduction*/0,
/*timeout*/1000,
/*getcount_only*/0);
}
softc->state = PMP_STATE_CLEAR;
softc->pm_step = 0;
}
xpt_release_ccb(done_ccb);
xpt_schedule(periph, priority);
return;
case PMP_STATE_CLEAR:
softc->pm_step++;
if (softc->pm_step >= softc->pm_ports) {
softc->state = PMP_STATE_CONFIG;
softc->pm_step = 0;
}
xpt_release_ccb(done_ccb);
xpt_schedule(periph, priority);
return;
case PMP_STATE_CONFIG:
for (i = 0; i < softc->pm_ports; i++) {
union ccb *ccb;
if ((softc->found & (1 << i)) == 0)
continue;
if (xpt_create_path(&dpath, periph,
xpt_path_path_id(periph->path),
i, 0) != CAM_REQ_CMP) {
printf("pmpdone: xpt_create_path failed\n");
continue;
}
/* If we did hard reset to this device, inform XPT. */
if ((softc->reset & softc->found & (1 << i)) != 0)
xpt_async(AC_SENT_BDR, dpath, NULL);
/* If rescan requested, scan this device. */
if (softc->events & PMP_EV_RESCAN) {
ccb = xpt_alloc_ccb_nowait();
if (ccb == NULL) {
xpt_free_path(dpath);
goto done;
}
xpt_setup_ccb(&ccb->ccb_h, dpath, CAM_PRIORITY_XPT);
xpt_rescan(ccb);
} else
xpt_free_path(dpath);
}
break;
default:
break;
}
done:
xpt_release_ccb(done_ccb);
softc->state = PMP_STATE_NORMAL;
softc->events = 0;
xpt_release_boot();
pmprelease(periph, -1);
cam_periph_release_locked(periph);
}
#endif /* _KERNEL */
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