dr_mem.c revision 07d06da50d310a325b457d6330165aebab1e0064
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* DR memory support routines.
*/
#include <sys/note.h>
#include <sys/debug.h>
#include <sys/types.h>
#include <sys/errno.h>
#include <sys/param.h>
#include <sys/dditypes.h>
#include <sys/kmem.h>
#include <sys/conf.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
#include <sys/sunndi.h>
#include <sys/ddi_impldefs.h>
#include <sys/ndi_impldefs.h>
#include <sys/sysmacros.h>
#include <sys/machsystm.h>
#include <sys/spitregs.h>
#include <sys/cpuvar.h>
#include <sys/promif.h>
#include <vm/seg_kmem.h>
#include <sys/lgrp.h>
#include <sys/platform_module.h>
#include <vm/page.h>
#include <sys/dr.h>
#include <sys/dr_util.h>
extern struct memlist *phys_install;
/* TODO: push this reference below drmach line */
extern int kcage_on;
/* for the DR*INTERNAL_ERROR macros. see sys/dr.h. */
static char *dr_ie_fmt = "dr_mem.c %d";
static int dr_post_detach_mem_unit(dr_mem_unit_t *mp);
static int dr_reserve_mem_spans(memhandle_t *mhp, struct memlist *mlist);
static int dr_select_mem_target(dr_handle_t *hp, dr_mem_unit_t *mp,
struct memlist *ml);
static void dr_init_mem_unit_data(dr_mem_unit_t *mp);
static int memlist_canfit(struct memlist *s_mlist,
struct memlist *t_mlist);
/*
* dr_mem_unit_t.sbm_flags
*/
#define DR_MFLAG_RESERVED 0x01 /* mem unit reserved for delete */
#define DR_MFLAG_SOURCE 0x02 /* source brd of copy/rename op */
#define DR_MFLAG_TARGET 0x04 /* target brd of copy/rename op */
#define DR_MFLAG_MEMUPSIZE 0x08 /* move from big to small board */
#define DR_MFLAG_MEMDOWNSIZE 0x10 /* move from small to big board */
#define DR_MFLAG_MEMRESIZE 0x18 /* move to different size board */
#define DR_MFLAG_RELOWNER 0x20 /* memory release (delete) owner */
#define DR_MFLAG_RELDONE 0x40 /* memory release (delete) done */
/* helper macros */
#define _ptob64(p) ((uint64_t)(p) << PAGESHIFT)
#define _b64top(b) ((pgcnt_t)((b) >> PAGESHIFT))
static struct memlist *
dr_get_memlist(dr_mem_unit_t *mp)
{
struct memlist *mlist = NULL;
sbd_error_t *err;
static fn_t f = "dr_get_memlist";
PR_MEM("%s for %s...\n", f, mp->sbm_cm.sbdev_path);
/*
* Return cached memlist, if present.
* This memlist will be present following an
* unconfigure (a.k.a: detach) of this memunit.
* It should only be used in the case were a configure
* is bringing this memunit back in without going
* through the disconnect and connect states.
*/
if (mp->sbm_mlist) {
PR_MEM("%s: found cached memlist\n", f);
mlist = memlist_dup(mp->sbm_mlist);
} else {
uint64_t basepa = _ptob64(mp->sbm_basepfn);
/* attempt to construct a memlist using phys_install */
/* round down to slice base address */
basepa &= ~(mp->sbm_slice_size - 1);
/* get a copy of phys_install to edit */
memlist_read_lock();
mlist = memlist_dup(phys_install);
memlist_read_unlock();
/* trim lower irrelevant span */
if (mlist)
mlist = memlist_del_span(mlist, 0ull, basepa);
/* trim upper irrelevant span */
if (mlist) {
uint64_t endpa;
basepa += mp->sbm_slice_size;
endpa = _ptob64(physmax + 1);
if (endpa > basepa)
mlist = memlist_del_span(
mlist,
basepa,
endpa - basepa);
}
if (mlist) {
/* successfully built a memlist */
PR_MEM("%s: derived memlist from phys_install\n", f);
}
/* if no mlist yet, try platform layer */
if (!mlist) {
err = drmach_mem_get_memlist(
mp->sbm_cm.sbdev_id, &mlist);
if (err) {
DRERR_SET_C(&mp->sbm_cm.sbdev_error, &err);
mlist = NULL; /* paranoia */
}
}
}
PR_MEM("%s: memlist for %s\n", f, mp->sbm_cm.sbdev_path);
PR_MEMLIST_DUMP(mlist);
return (mlist);
}
typedef struct {
kcondvar_t cond;
kmutex_t lock;
int error;
int done;
} dr_release_mem_sync_t;
/*
* Memory has been logically removed by the time this routine is called.
*/
static void
dr_mem_del_done(void *arg, int error)
{
dr_release_mem_sync_t *ds = arg;
mutex_enter(&ds->lock);
ds->error = error;
ds->done = 1;
cv_signal(&ds->cond);
mutex_exit(&ds->lock);
}
/*
* When we reach here the memory being drained should have
* already been reserved in dr_pre_release_mem().
* Our only task here is to kick off the "drain" and wait
* for it to finish.
*/
void
dr_release_mem(dr_common_unit_t *cp)
{
dr_mem_unit_t *mp = (dr_mem_unit_t *)cp;
int err;
dr_release_mem_sync_t rms;
static fn_t f = "dr_release_mem";
/* check that this memory unit has been reserved */
if (!(mp->sbm_flags & DR_MFLAG_RELOWNER)) {
DR_DEV_INTERNAL_ERROR(&mp->sbm_cm);
return;
}
bzero((void *) &rms, sizeof (rms));
mutex_init(&rms.lock, NULL, MUTEX_DRIVER, NULL);
cv_init(&rms.cond, NULL, CV_DRIVER, NULL);
mutex_enter(&rms.lock);
err = kphysm_del_start(mp->sbm_memhandle, dr_mem_del_done,
(void *) &rms);
if (err == KPHYSM_OK) {
/* wait for completion or interrupt */
while (!rms.done) {
if (cv_wait_sig(&rms.cond, &rms.lock) == 0) {
/* then there is a pending UNIX signal */
(void) kphysm_del_cancel(mp->sbm_memhandle);
/* wait for completion */
while (!rms.done)
cv_wait(&rms.cond, &rms.lock);
}
}
/* get the result of the memory delete operation */
err = rms.error;
}
mutex_exit(&rms.lock);
cv_destroy(&rms.cond);
mutex_destroy(&rms.lock);
if (err != KPHYSM_OK) {
int e_code;
switch (err) {
case KPHYSM_ENOWORK:
e_code = ESBD_NOERROR;
break;
case KPHYSM_EHANDLE:
case KPHYSM_ESEQUENCE:
e_code = ESBD_INTERNAL;
break;
case KPHYSM_ENOTVIABLE:
e_code = ESBD_MEM_NOTVIABLE;
break;
case KPHYSM_EREFUSED:
e_code = ESBD_MEM_REFUSED;
break;
case KPHYSM_ENONRELOC:
e_code = ESBD_MEM_NONRELOC;
break;
case KPHYSM_ECANCELLED:
e_code = ESBD_MEM_CANCELLED;
break;
case KPHYSM_ERESOURCE:
e_code = ESBD_MEMFAIL;
break;
default:
cmn_err(CE_WARN,
"%s: unexpected kphysm error code %d,"
" id 0x%p",
f, err, mp->sbm_cm.sbdev_id);
e_code = ESBD_IO;
break;
}
if (e_code != ESBD_NOERROR) {
dr_dev_err(CE_IGNORE, &mp->sbm_cm, e_code);
}
}
}
void
dr_attach_mem(dr_handle_t *hp, dr_common_unit_t *cp)
{
_NOTE(ARGUNUSED(hp))
dr_mem_unit_t *mp = (dr_mem_unit_t *)cp;
struct memlist *ml, *mc;
sbd_error_t *err;
static fn_t f = "dr_attach_mem";
PR_MEM("%s...\n", f);
dr_lock_status(hp->h_bd);
err = drmach_configure(cp->sbdev_id, 0);
dr_unlock_status(hp->h_bd);
if (err) {
DRERR_SET_C(&cp->sbdev_error, &err);
return;
}
ml = dr_get_memlist(mp);
for (mc = ml; mc; mc = mc->next) {
int rv;
sbd_error_t *err;
rv = kphysm_add_memory_dynamic(
(pfn_t)(mc->address >> PAGESHIFT),
(pgcnt_t)(mc->size >> PAGESHIFT));
if (rv != KPHYSM_OK) {
/*
* translate kphysm error and
* store in devlist error
*/
switch (rv) {
case KPHYSM_ERESOURCE:
rv = ESBD_NOMEM;
break;
case KPHYSM_EFAULT:
rv = ESBD_FAULT;
break;
default:
rv = ESBD_INTERNAL;
break;
}
if (rv == ESBD_INTERNAL) {
DR_DEV_INTERNAL_ERROR(&mp->sbm_cm);
} else
dr_dev_err(CE_WARN, &mp->sbm_cm, rv);
break;
}
err = drmach_mem_add_span(
mp->sbm_cm.sbdev_id, mc->address, mc->size);
if (err) {
DRERR_SET_C(&mp->sbm_cm.sbdev_error, &err);
break;
}
}
memlist_delete(ml);
/* back out if configure failed */
if (mp->sbm_cm.sbdev_error != NULL) {
dr_lock_status(hp->h_bd);
err = drmach_unconfigure(cp->sbdev_id,
DEVI_BRANCH_DESTROY);
if (err)
sbd_err_clear(&err);
dr_unlock_status(hp->h_bd);
}
}
#define DR_SCRUB_VALUE 0x0d0e0a0d0b0e0e0fULL
static void
dr_mem_ecache_scrub(dr_mem_unit_t *mp, struct memlist *mlist)
{
#ifdef DEBUG
clock_t stime = ddi_get_lbolt();
#endif /* DEBUG */
struct memlist *ml;
uint64_t scrub_value = DR_SCRUB_VALUE;
processorid_t cpuid;
static fn_t f = "dr_mem_ecache_scrub";
cpuid = drmach_mem_cpu_affinity(mp->sbm_cm.sbdev_id);
affinity_set(cpuid);
PR_MEM("%s: using proc %d, memlist...\n", f,
(cpuid == CPU_CURRENT) ? CPU->cpu_id : cpuid);
PR_MEMLIST_DUMP(mlist);
for (ml = mlist; ml; ml = ml->next) {
uint64_t dst_pa;
uint64_t nbytes;
/* calculate the destination physical address */
dst_pa = ml->address;
if (ml->address & PAGEOFFSET)
cmn_err(CE_WARN,
"%s: address (0x%lx) not on "
"page boundary", f, ml->address);
nbytes = ml->size;
if (ml->size & PAGEOFFSET)
cmn_err(CE_WARN,
"%s: size (0x%lx) not on "
"page boundary", f, ml->size);
/*LINTED*/
while (nbytes > 0) {
/* write 64 bits to dst_pa */
stdphys(dst_pa, scrub_value);
/* increment/decrement by cacheline sizes */
dst_pa += DRMACH_COHERENCY_UNIT;
nbytes -= DRMACH_COHERENCY_UNIT;
}
}
/*
* flush this cpu's ecache and take care to ensure
* that all of it's bus transactions have retired.
*/
drmach_cpu_flush_ecache_sync();
affinity_clear();
#ifdef DEBUG
stime = ddi_get_lbolt() - stime;
PR_MEM("%s: scrub ticks = %ld (%ld secs)\n", f, stime, stime / hz);
#endif /* DEBUG */
}
static int
dr_move_memory(dr_handle_t *hp, dr_mem_unit_t *s_mp, dr_mem_unit_t *t_mp)
{
time_t copytime;
drmachid_t cr_id;
dr_sr_handle_t *srhp;
struct memlist *c_ml, *d_ml;
sbd_error_t *err;
static fn_t f = "dr_move_memory";
PR_MEM("%s: (INLINE) moving memory from %s to %s\n",
f,
s_mp->sbm_cm.sbdev_path,
t_mp->sbm_cm.sbdev_path);
ASSERT(s_mp->sbm_flags & DR_MFLAG_SOURCE);
ASSERT(s_mp->sbm_peer == t_mp);
ASSERT(s_mp->sbm_mlist);
ASSERT(t_mp->sbm_flags & DR_MFLAG_TARGET);
ASSERT(t_mp->sbm_peer == s_mp);
/*
* create a memlist of spans to copy by removing
* the spans that have been deleted, if any, from
* the full source board memlist. s_mp->sbm_del_mlist
* will be NULL if there were no spans deleted from
* the source board.
*/
c_ml = memlist_dup(s_mp->sbm_mlist);
d_ml = s_mp->sbm_del_mlist;
while (d_ml != NULL) {
c_ml = memlist_del_span(c_ml, d_ml->address, d_ml->size);
d_ml = d_ml->next;
}
affinity_set(drmach_mem_cpu_affinity(t_mp->sbm_cm.sbdev_id));
err = drmach_copy_rename_init(
t_mp->sbm_cm.sbdev_id, _ptob64(t_mp->sbm_slice_offset),
s_mp->sbm_cm.sbdev_id, c_ml, &cr_id);
if (err) {
DRERR_SET_C(&s_mp->sbm_cm.sbdev_error, &err);
affinity_clear();
return (-1);
}
srhp = dr_get_sr_handle(hp);
ASSERT(srhp);
copytime = ddi_get_lbolt();
/* Quiesce the OS. */
if (dr_suspend(srhp)) {
cmn_err(CE_WARN, "%s: failed to quiesce OS"
" for copy-rename", f);
dr_release_sr_handle(srhp);
err = drmach_copy_rename_fini(cr_id);
if (err) {
/*
* no error is expected since the program has
* not yet run.
*/
/* catch this in debug kernels */
ASSERT(0);
sbd_err_clear(&err);
}
/* suspend error reached via hp */
s_mp->sbm_cm.sbdev_error = hp->h_err;
hp->h_err = NULL;
affinity_clear();
return (-1);
}
/*
* Rename memory for lgroup.
* Source and target board numbers are packaged in arg.
*/
{
dr_board_t *t_bp, *s_bp;
s_bp = s_mp->sbm_cm.sbdev_bp;
t_bp = t_mp->sbm_cm.sbdev_bp;
lgrp_plat_config(LGRP_CONFIG_MEM_RENAME,
(uintptr_t)(s_bp->b_num | (t_bp->b_num << 16)));
}
drmach_copy_rename(cr_id);
/* Resume the OS. */
dr_resume(srhp);
copytime = ddi_get_lbolt() - copytime;
dr_release_sr_handle(srhp);
err = drmach_copy_rename_fini(cr_id);
if (err)
DRERR_SET_C(&s_mp->sbm_cm.sbdev_error, &err);
affinity_clear();
PR_MEM("%s: copy-rename elapsed time = %ld ticks (%ld secs)\n",
f, copytime, copytime / hz);
/* return -1 if dr_suspend or copy/rename recorded an error */
return (err == NULL ? 0 : -1);
}
/*
* If detaching node contains memory that is "non-permanent"
* then the memory adr's are simply cleared. If the memory
* is non-relocatable, then do a copy-rename.
*/
void
dr_detach_mem(dr_handle_t *hp, dr_common_unit_t *cp)
{
int rv = 0;
dr_mem_unit_t *s_mp = (dr_mem_unit_t *)cp;
dr_mem_unit_t *t_mp;
dr_state_t state;
static fn_t f = "dr_detach_mem";
PR_MEM("%s...\n", f);
/* lookup target mem unit and target board structure, if any */
if (s_mp->sbm_flags & DR_MFLAG_SOURCE) {
t_mp = s_mp->sbm_peer;
ASSERT(t_mp != NULL);
ASSERT(t_mp->sbm_peer == s_mp);
} else {
t_mp = NULL;
}
/* verify mem unit's state is UNREFERENCED */
state = s_mp->sbm_cm.sbdev_state;
if (state != DR_STATE_UNREFERENCED) {
dr_dev_err(CE_IGNORE, &s_mp->sbm_cm, ESBD_STATE);
return;
}
/* verify target mem unit's state is UNREFERENCED, if any */
if (t_mp != NULL) {
state = t_mp->sbm_cm.sbdev_state;
if (state != DR_STATE_UNREFERENCED) {
dr_dev_err(CE_IGNORE, &t_mp->sbm_cm, ESBD_STATE);
return;
}
}
/*
* Scrub deleted memory. This will cause all cachelines
* referencing the memory to only be in the local cpu's
* ecache.
*/
if (s_mp->sbm_flags & DR_MFLAG_RELDONE) {
/* no del mlist for src<=dst mem size copy/rename */
if (s_mp->sbm_del_mlist)
dr_mem_ecache_scrub(s_mp, s_mp->sbm_del_mlist);
}
if (t_mp != NULL && (t_mp->sbm_flags & DR_MFLAG_RELDONE)) {
ASSERT(t_mp->sbm_del_mlist);
dr_mem_ecache_scrub(t_mp, t_mp->sbm_del_mlist);
}
/*
* If there is no target board (no copy/rename was needed), then
* we're done!
*/
if (t_mp == NULL) {
sbd_error_t *err;
/*
* Reprogram interconnect hardware and disable
* memory controllers for memory node that's going away.
*/
err = drmach_mem_disable(s_mp->sbm_cm.sbdev_id);
if (err) {
DRERR_SET_C(&s_mp->sbm_cm.sbdev_error, &err);
rv = -1;
}
} else {
rv = dr_move_memory(hp, s_mp, t_mp);
PR_MEM("%s: %s memory COPY-RENAME (board %d -> %d)\n",
f,
rv ? "FAILED" : "COMPLETED",
s_mp->sbm_cm.sbdev_bp->b_num,
t_mp->sbm_cm.sbdev_bp->b_num);
if (rv != 0)
(void) dr_cancel_mem(s_mp);
}
if (rv == 0) {
sbd_error_t *err;
dr_lock_status(hp->h_bd);
err = drmach_unconfigure(s_mp->sbm_cm.sbdev_id,
DEVI_BRANCH_DESTROY);
dr_unlock_status(hp->h_bd);
if (err)
sbd_err_clear(&err);
}
}
#ifndef _STARFIRE
/*
* XXX workaround for certain lab configurations (see also starcat drmach.c)
* Temporary code to get around observed incorrect results from
* kphysm_del_span_query when the queried span contains address spans
* not occupied by memory in between spans that do have memory.
* This routine acts as a wrapper to kphysm_del_span_query. It builds
* a memlist from phys_install of spans that exist between base and
* base + npages, inclusively. Kphysm_del_span_query is called for each
* node in the memlist with the results accumulated in *mp.
*/
static int
dr_del_span_query(pfn_t base, pgcnt_t npages, memquery_t *mp)
{
uint64_t pa = _ptob64(base);
uint64_t sm = ~ (137438953472ull - 1);
uint64_t sa = pa & sm;
struct memlist *mlist, *ml;
int rv;
npages = npages; /* silence lint */
memlist_read_lock();
mlist = memlist_dup(phys_install);
memlist_read_unlock();
again:
for (ml = mlist; ml; ml = ml->next) {
if ((ml->address & sm) != sa) {
mlist = memlist_del_span(mlist, ml->address, ml->size);
goto again;
}
}
mp->phys_pages = 0;
mp->managed = 0;
mp->nonrelocatable = 0;
mp->first_nonrelocatable = (pfn_t)-1; /* XXX */
mp->last_nonrelocatable = 0;
for (ml = mlist; ml; ml = ml->next) {
memquery_t mq;
rv = kphysm_del_span_query(
_b64top(ml->address), _b64top(ml->size), &mq);
if (rv)
break;
mp->phys_pages += mq.phys_pages;
mp->managed += mq.managed;
mp->nonrelocatable += mq.nonrelocatable;
if (mq.nonrelocatable != 0) {
if (mq.first_nonrelocatable < mp->first_nonrelocatable)
mp->first_nonrelocatable =
mq.first_nonrelocatable;
if (mq.last_nonrelocatable > mp->last_nonrelocatable)
mp->last_nonrelocatable =
mq.last_nonrelocatable;
}
}
if (mp->nonrelocatable == 0)
mp->first_nonrelocatable = 0; /* XXX */
memlist_delete(mlist);
return (rv);
}
#define kphysm_del_span_query dr_del_span_query
#endif /* _STARFIRE */
/*
* NOTE: This routine is only partially smart about multiple
* mem-units. Need to make mem-status structure smart
* about them also.
*/
int
dr_mem_status(dr_handle_t *hp, dr_devset_t devset, sbd_dev_stat_t *dsp)
{
int m, mix;
memdelstat_t mdst;
memquery_t mq;
dr_board_t *bp;
dr_mem_unit_t *mp;
sbd_mem_stat_t *msp;
static fn_t f = "dr_mem_status";
bp = hp->h_bd;
devset &= DR_DEVS_PRESENT(bp);
for (m = mix = 0; m < MAX_MEM_UNITS_PER_BOARD; m++) {
int rv;
sbd_error_t *err;
drmach_status_t pstat;
dr_mem_unit_t *p_mp;
if (DEVSET_IN_SET(devset, SBD_COMP_MEM, m) == 0)
continue;
mp = dr_get_mem_unit(bp, m);
if (mp->sbm_cm.sbdev_state == DR_STATE_EMPTY) {
/* present, but not fully initialized */
continue;
}
if (mp->sbm_cm.sbdev_id == (drmachid_t)0)
continue;
/* fetch platform status */
err = drmach_status(mp->sbm_cm.sbdev_id, &pstat);
if (err) {
DRERR_SET_C(&mp->sbm_cm.sbdev_error, &err);
continue;
}
msp = &dsp->d_mem;
bzero((caddr_t)msp, sizeof (*msp));
(void) strncpy(msp->ms_cm.c_id.c_name, pstat.type,
sizeof (msp->ms_cm.c_id.c_name));
msp->ms_cm.c_id.c_type = mp->sbm_cm.sbdev_type;
msp->ms_cm.c_id.c_unit = SBD_NULL_UNIT;
msp->ms_cm.c_cond = mp->sbm_cm.sbdev_cond;
msp->ms_cm.c_busy = mp->sbm_cm.sbdev_busy | pstat.busy;
msp->ms_cm.c_time = mp->sbm_cm.sbdev_time;
msp->ms_cm.c_ostate = mp->sbm_cm.sbdev_ostate;
msp->ms_totpages = mp->sbm_npages;
msp->ms_basepfn = mp->sbm_basepfn;
msp->ms_pageslost = mp->sbm_pageslost;
msp->ms_cage_enabled = kcage_on;
if (mp->sbm_flags & DR_MFLAG_RESERVED)
p_mp = mp->sbm_peer;
else
p_mp = NULL;
if (p_mp == NULL) {
msp->ms_peer_is_target = 0;
msp->ms_peer_ap_id[0] = '\0';
} else if (p_mp->sbm_flags & DR_MFLAG_RESERVED) {
char *path = kmem_alloc(MAXPATHLEN, KM_SLEEP);
char *minor;
/*
* b_dip doesn't have to be held for ddi_pathname()
* because the board struct (dr_board_t) will be
* destroyed before b_dip detaches.
*/
(void) ddi_pathname(bp->b_dip, path);
minor = strchr(p_mp->sbm_cm.sbdev_path, ':');
(void) snprintf(msp->ms_peer_ap_id,
sizeof (msp->ms_peer_ap_id), "%s%s",
path, (minor == NULL) ? "" : minor);
kmem_free(path, MAXPATHLEN);
if (p_mp->sbm_flags & DR_MFLAG_TARGET)
msp->ms_peer_is_target = 1;
}
if (mp->sbm_flags & DR_MFLAG_RELOWNER)
rv = kphysm_del_status(mp->sbm_memhandle, &mdst);
else
rv = KPHYSM_EHANDLE; /* force 'if' to fail */
if (rv == KPHYSM_OK) {
/*
* Any pages above managed is "free",
* i.e. it's collected.
*/
msp->ms_detpages += (uint_t)(mdst.collected +
mdst.phys_pages - mdst.managed);
} else {
/*
* If we're UNREFERENCED or UNCONFIGURED,
* then the number of detached pages is
* however many pages are on the board.
* I.e. detached = not in use by OS.
*/
switch (msp->ms_cm.c_ostate) {
/*
* changed to use cfgadm states
*
* was:
* case DR_STATE_UNREFERENCED:
* case DR_STATE_UNCONFIGURED:
*/
case SBD_STAT_UNCONFIGURED:
msp->ms_detpages = msp->ms_totpages;
break;
default:
break;
}
}
/*
* kphysm_del_span_query can report non-reloc pages = total
* pages for memory that is not yet configured
*/
if (mp->sbm_cm.sbdev_state != DR_STATE_UNCONFIGURED) {
rv = kphysm_del_span_query(mp->sbm_basepfn,
mp->sbm_npages, &mq);
if (rv == KPHYSM_OK) {
msp->ms_managed_pages = mq.managed;
msp->ms_noreloc_pages = mq.nonrelocatable;
msp->ms_noreloc_first =
mq.first_nonrelocatable;
msp->ms_noreloc_last =
mq.last_nonrelocatable;
msp->ms_cm.c_sflags = 0;
if (mq.nonrelocatable) {
SBD_SET_SUSPEND(SBD_CMD_UNCONFIGURE,
msp->ms_cm.c_sflags);
}
} else {
PR_MEM("%s: kphysm_del_span_query() = %d\n",
f, rv);
}
}
/*
* Check source unit state during copy-rename
*/
if ((mp->sbm_flags & DR_MFLAG_SOURCE) &&
(mp->sbm_cm.sbdev_state == DR_STATE_UNREFERENCED ||
mp->sbm_cm.sbdev_state == DR_STATE_RELEASE))
msp->ms_cm.c_ostate = SBD_STAT_CONFIGURED;
mix++;
dsp++;
}
return (mix);
}
int
dr_pre_attach_mem(dr_handle_t *hp, dr_common_unit_t **devlist, int devnum)
{
_NOTE(ARGUNUSED(hp))
int err_flag = 0;
int d;
sbd_error_t *err;
static fn_t f = "dr_pre_attach_mem";
PR_MEM("%s...\n", f);
for (d = 0; d < devnum; d++) {
dr_mem_unit_t *mp = (dr_mem_unit_t *)devlist[d];
dr_state_t state;
cmn_err(CE_CONT, "OS configure %s", mp->sbm_cm.sbdev_path);
state = mp->sbm_cm.sbdev_state;
switch (state) {
case DR_STATE_UNCONFIGURED:
PR_MEM("%s: recovering from UNCONFIG for %s\n",
f,
mp->sbm_cm.sbdev_path);
/* use memlist cached by dr_post_detach_mem_unit */
ASSERT(mp->sbm_mlist != NULL);
PR_MEM("%s: re-configuring cached memlist for %s:\n",
f, mp->sbm_cm.sbdev_path);
PR_MEMLIST_DUMP(mp->sbm_mlist);
/* kphysm del handle should be have been freed */
ASSERT((mp->sbm_flags & DR_MFLAG_RELOWNER) == 0);
/*FALLTHROUGH*/
case DR_STATE_CONNECTED:
PR_MEM("%s: reprogramming mem hardware on %s\n",
f, mp->sbm_cm.sbdev_bp->b_path);
PR_MEM("%s: enabling %s\n",
f, mp->sbm_cm.sbdev_path);
err = drmach_mem_enable(mp->sbm_cm.sbdev_id);
if (err) {
DRERR_SET_C(&mp->sbm_cm.sbdev_error, &err);
err_flag = 1;
}
break;
default:
dr_dev_err(CE_WARN, &mp->sbm_cm, ESBD_STATE);
err_flag = 1;
break;
}
/* exit for loop if error encountered */
if (err_flag)
break;
}
return (err_flag ? -1 : 0);
}
int
dr_post_attach_mem(dr_handle_t *hp, dr_common_unit_t **devlist, int devnum)
{
_NOTE(ARGUNUSED(hp))
int d;
static fn_t f = "dr_post_attach_mem";
PR_MEM("%s...\n", f);
for (d = 0; d < devnum; d++) {
dr_mem_unit_t *mp = (dr_mem_unit_t *)devlist[d];
struct memlist *mlist, *ml;
mlist = dr_get_memlist(mp);
if (mlist == NULL) {
dr_dev_err(CE_WARN, &mp->sbm_cm, ESBD_MEMFAIL);
continue;
}
/*
* Verify the memory really did successfully attach
* by checking for its existence in phys_install.
*/
memlist_read_lock();
if (memlist_intersect(phys_install, mlist) == 0) {
memlist_read_unlock();
DR_DEV_INTERNAL_ERROR(&mp->sbm_cm);
PR_MEM("%s: %s memlist not in phys_install",
f, mp->sbm_cm.sbdev_path);
memlist_delete(mlist);
continue;
}
memlist_read_unlock();
for (ml = mlist; ml != NULL; ml = ml->next) {
sbd_error_t *err;
err = drmach_mem_add_span(
mp->sbm_cm.sbdev_id,
ml->address,
ml->size);
if (err)
DRERR_SET_C(&mp->sbm_cm.sbdev_error, &err);
}
memlist_delete(mlist);
/*
* Destroy cached memlist, if any.
* There will be a cached memlist in sbm_mlist if
* this board is being configured directly after
* an unconfigure.
* To support this transition, dr_post_detach_mem
* left a copy of the last known memlist in sbm_mlist.
* This memlist could differ from any derived from
* hardware if while this memunit was last configured
* the system detected and deleted bad pages from
* phys_install. The location of those bad pages
* will be reflected in the cached memlist.
*/
if (mp->sbm_mlist) {
memlist_delete(mp->sbm_mlist);
mp->sbm_mlist = NULL;
}
/*
* TODO: why is this call to dr_init_mem_unit_data here?
* this has been done at discovery or connect time, so this is
* probably redundant and unnecessary.
*/
dr_init_mem_unit_data(mp);
}
return (0);
}
int
dr_pre_detach_mem(dr_handle_t *hp, dr_common_unit_t **devlist, int devnum)
{
_NOTE(ARGUNUSED(hp))
int d;
for (d = 0; d < devnum; d++) {
dr_mem_unit_t *mp = (dr_mem_unit_t *)devlist[d];
cmn_err(CE_CONT, "OS unconfigure %s", mp->sbm_cm.sbdev_path);
}
return (0);
}
int
dr_post_detach_mem(dr_handle_t *hp, dr_common_unit_t **devlist, int devnum)
{
_NOTE(ARGUNUSED(hp))
int d, rv;
static fn_t f = "dr_post_detach_mem";
PR_MEM("%s...\n", f);
rv = 0;
for (d = 0; d < devnum; d++) {
dr_mem_unit_t *mp = (dr_mem_unit_t *)devlist[d];
ASSERT(mp->sbm_cm.sbdev_bp == hp->h_bd);
if (dr_post_detach_mem_unit(mp))
rv = -1;
}
return (rv);
}
static void
dr_add_memory_spans(dr_mem_unit_t *mp, struct memlist *ml)
{
static fn_t f = "dr_add_memory_spans";
PR_MEM("%s...", f);
PR_MEMLIST_DUMP(ml);
#ifdef DEBUG
memlist_read_lock();
if (memlist_intersect(phys_install, ml)) {
PR_MEM("%s:WARNING: memlist intersects with phys_install\n", f);
}
memlist_read_unlock();
#endif
for (; ml; ml = ml->next) {
pfn_t base;
pgcnt_t npgs;
int rv;
sbd_error_t *err;
base = _b64top(ml->address);
npgs = _b64top(ml->size);
rv = kphysm_add_memory_dynamic(base, npgs);
err = drmach_mem_add_span(
mp->sbm_cm.sbdev_id,
ml->address,
ml->size);
if (err)
DRERR_SET_C(&mp->sbm_cm.sbdev_error, &err);
if (rv != KPHYSM_OK) {
cmn_err(CE_WARN, "%s:"
" unexpected kphysm_add_memory_dynamic"
" return value %d;"
" basepfn=0x%lx, npages=%ld\n",
f, rv, base, npgs);
continue;
}
}
}
static int
dr_post_detach_mem_unit(dr_mem_unit_t *s_mp)
{
uint64_t sz = s_mp->sbm_slice_size;
uint64_t sm = sz - 1;
/* old and new below refer to PAs before and after copy-rename */
uint64_t s_old_basepa, s_new_basepa;
uint64_t t_old_basepa, t_new_basepa;
uint64_t t_new_smallsize = 0;
dr_mem_unit_t *t_mp, *x_mp;
struct memlist *ml;
int rv;
sbd_error_t *err;
static fn_t f = "dr_post_detach_mem_unit";
PR_MEM("%s...\n", f);
/* s_mp->sbm_del_mlist could be NULL, meaning no deleted spans */
PR_MEM("%s: %s: deleted memlist (EMPTY maybe okay):\n",
f, s_mp->sbm_cm.sbdev_path);
PR_MEMLIST_DUMP(s_mp->sbm_del_mlist);
/* sanity check */
ASSERT(s_mp->sbm_del_mlist == NULL ||
(s_mp->sbm_flags & DR_MFLAG_RELDONE) != 0);
if (s_mp->sbm_flags & DR_MFLAG_SOURCE) {
t_mp = s_mp->sbm_peer;
ASSERT(t_mp != NULL);
ASSERT(t_mp->sbm_flags & DR_MFLAG_TARGET);
ASSERT(t_mp->sbm_peer == s_mp);
ASSERT(t_mp->sbm_flags & DR_MFLAG_RELDONE);
ASSERT(t_mp->sbm_del_mlist);
PR_MEM("%s: target %s: deleted memlist:\n",
f, t_mp->sbm_cm.sbdev_path);
PR_MEMLIST_DUMP(t_mp->sbm_del_mlist);
} else {
/* this is no target unit */
t_mp = NULL;
}
/*
* Verify the memory really did successfully detach
* by checking for its non-existence in phys_install.
*/
rv = 0;
memlist_read_lock();
if (s_mp->sbm_flags & DR_MFLAG_RELDONE) {
x_mp = s_mp;
rv = memlist_intersect(phys_install, x_mp->sbm_del_mlist);
}
if (rv == 0 && t_mp && (t_mp->sbm_flags & DR_MFLAG_RELDONE)) {
x_mp = t_mp;
rv = memlist_intersect(phys_install, x_mp->sbm_del_mlist);
}
memlist_read_unlock();
if (rv) {
/* error: memlist still in phys_install */
DR_DEV_INTERNAL_ERROR(&x_mp->sbm_cm);
}
/*
* clean mem unit state and bail out if an error has been recorded.
*/
rv = 0;
if (s_mp->sbm_cm.sbdev_error) {
PR_MEM("%s: %s flags=%x", f,
s_mp->sbm_cm.sbdev_path, s_mp->sbm_flags);
DR_DEV_CLR_UNREFERENCED(&s_mp->sbm_cm);
DR_DEV_CLR_RELEASED(&s_mp->sbm_cm);
dr_device_transition(&s_mp->sbm_cm, DR_STATE_CONFIGURED);
rv = -1;
}
if (t_mp != NULL && t_mp->sbm_cm.sbdev_error != NULL) {
PR_MEM("%s: %s flags=%x", f,
s_mp->sbm_cm.sbdev_path, s_mp->sbm_flags);
DR_DEV_CLR_UNREFERENCED(&t_mp->sbm_cm);
DR_DEV_CLR_RELEASED(&t_mp->sbm_cm);
dr_device_transition(&t_mp->sbm_cm, DR_STATE_CONFIGURED);
rv = -1;
}
if (rv)
goto cleanup;
s_old_basepa = _ptob64(s_mp->sbm_basepfn);
err = drmach_mem_get_base_physaddr(s_mp->sbm_cm.sbdev_id,
&s_new_basepa);
ASSERT(err == NULL);
PR_MEM("%s:s_old_basepa: 0x%lx\n", f, s_old_basepa);
PR_MEM("%s:s_new_basepa: 0x%lx\n", f, s_new_basepa);
if (t_mp != NULL) {
struct memlist *s_copy_mlist;
t_old_basepa = _ptob64(t_mp->sbm_basepfn);
err = drmach_mem_get_base_physaddr(t_mp->sbm_cm.sbdev_id,
&t_new_basepa);
ASSERT(err == NULL);
PR_MEM("%s:t_old_basepa: 0x%lx\n", f, t_old_basepa);
PR_MEM("%s:t_new_basepa: 0x%lx\n", f, t_new_basepa);
/*
* Construct copy list with original source addresses.
* Used to add back excess target mem.
*/
s_copy_mlist = memlist_dup(s_mp->sbm_mlist);
for (ml = s_mp->sbm_del_mlist; ml; ml = ml->next) {
s_copy_mlist = memlist_del_span(s_copy_mlist,
ml->address, ml->size);
}
PR_MEM("%s: source copy list:\n:", f);
PR_MEMLIST_DUMP(s_copy_mlist);
/*
* We had to swap mem-units, so update
* memlists accordingly with new base
* addresses.
*/
for (ml = t_mp->sbm_mlist; ml; ml = ml->next) {
ml->address -= t_old_basepa;
ml->address += t_new_basepa;
}
/*
* There is no need to explicitly rename the target delete
* memlist, because sbm_del_mlist and sbm_mlist always
* point to the same memlist for a copy/rename operation.
*/
ASSERT(t_mp->sbm_del_mlist == t_mp->sbm_mlist);
PR_MEM("%s: renamed target memlist and delete memlist:\n", f);
PR_MEMLIST_DUMP(t_mp->sbm_mlist);
for (ml = s_mp->sbm_mlist; ml; ml = ml->next) {
ml->address -= s_old_basepa;
ml->address += s_new_basepa;
}
PR_MEM("%s: renamed source memlist:\n", f);
PR_MEMLIST_DUMP(s_mp->sbm_mlist);
/*
* Keep track of dynamically added segments
* since they cannot be split if we need to delete
* excess source memory later for this board.
*/
if (t_mp->sbm_dyn_segs)
memlist_delete(t_mp->sbm_dyn_segs);
t_mp->sbm_dyn_segs = s_mp->sbm_dyn_segs;
s_mp->sbm_dyn_segs = NULL;
/*
* If the target memory range with the new target base PA
* extends beyond the usable slice, prevent any "target excess"
* from being added back after this copy/rename and
* calculate the new smaller size of the target board
* to be set as part of target cleanup. The base + npages
* must only include the range of memory up to the end of
* this slice. This will only be used after a category 4
* large-to-small target type copy/rename - see comments
* in dr_select_mem_target.
*/
if (((t_new_basepa & sm) + _ptob64(t_mp->sbm_npages)) > sz) {
t_new_smallsize = sz - (t_new_basepa & sm);
}
if (s_mp->sbm_flags & DR_MFLAG_MEMRESIZE &&
t_new_smallsize == 0) {
struct memlist *t_excess_mlist;
/*
* Add back excess target memory.
* Subtract out the portion of the target memory
* node that was taken over by the source memory
* node.
*/
t_excess_mlist = memlist_dup(t_mp->sbm_mlist);
for (ml = s_copy_mlist; ml; ml = ml->next) {
t_excess_mlist =
memlist_del_span(t_excess_mlist,
ml->address, ml->size);
}
/*
* Update dynamically added segs
*/
for (ml = s_mp->sbm_del_mlist; ml; ml = ml->next) {
t_mp->sbm_dyn_segs =
memlist_del_span(t_mp->sbm_dyn_segs,
ml->address, ml->size);
}
for (ml = t_excess_mlist; ml; ml = ml->next) {
t_mp->sbm_dyn_segs =
memlist_cat_span(t_mp->sbm_dyn_segs,
ml->address, ml->size);
}
PR_MEM("%s: %s: updated dynamic seg list:\n",
f, t_mp->sbm_cm.sbdev_path);
PR_MEMLIST_DUMP(t_mp->sbm_dyn_segs);
PR_MEM("%s: adding back remaining portion"
" of %s, memlist:\n",
f, t_mp->sbm_cm.sbdev_path);
PR_MEMLIST_DUMP(t_excess_mlist);
dr_add_memory_spans(s_mp, t_excess_mlist);
memlist_delete(t_excess_mlist);
}
memlist_delete(s_copy_mlist);
#ifdef DEBUG
/*
* Renaming s_mp->sbm_del_mlist is not necessary. This
* list is not used beyond this point, and in fact, is
* disposed of at the end of this function.
*/
for (ml = s_mp->sbm_del_mlist; ml; ml = ml->next) {
ml->address -= s_old_basepa;
ml->address += s_new_basepa;
}
PR_MEM("%s: renamed source delete memlist", f);
PR_MEMLIST_DUMP(s_mp->sbm_del_mlist);
#endif
}
if (t_mp != NULL) {
/* delete target's entire address space */
err = drmach_mem_del_span(t_mp->sbm_cm.sbdev_id,
t_old_basepa & ~ sm, sz);
if (err)
DRERR_SET_C(&t_mp->sbm_cm.sbdev_error, &err);
ASSERT(err == NULL);
/*
* After the copy/rename, the original address space
* for the source board (which is now located on the
* target board) may now have some excess to be deleted.
* The amount is calculated by masking the slice
* info and keeping the slice offset from t_new_basepa.
*/
err = drmach_mem_del_span(s_mp->sbm_cm.sbdev_id,
s_old_basepa & ~ sm, t_new_basepa & sm);
if (err)
DRERR_SET_C(&s_mp->sbm_cm.sbdev_error, &err);
ASSERT(err == NULL);
} else {
/* delete board's entire address space */
err = drmach_mem_del_span(s_mp->sbm_cm.sbdev_id,
s_old_basepa & ~ sm, sz);
if (err)
DRERR_SET_C(&s_mp->sbm_cm.sbdev_error, &err);
ASSERT(err == NULL);
}
cleanup:
/* clean up target mem unit */
if (t_mp != NULL) {
memlist_delete(t_mp->sbm_del_mlist);
/* no need to delete sbm_mlist, it shares sbm_del_mlist */
t_mp->sbm_del_mlist = NULL;
t_mp->sbm_mlist = NULL;
t_mp->sbm_peer = NULL;
t_mp->sbm_flags = 0;
t_mp->sbm_cm.sbdev_busy = 0;
dr_init_mem_unit_data(t_mp);
/* reduce target size if new PAs go past end of usable slice */
if (t_new_smallsize > 0) {
t_mp->sbm_npages = _b64top(t_new_smallsize);
PR_MEM("%s: target new size 0x%lx bytes\n",
f, t_new_smallsize);
}
}
if (t_mp != NULL && t_mp->sbm_cm.sbdev_error == NULL) {
/*
* now that copy/rename has completed, undo this
* work that was done in dr_release_mem_done.
*/
DR_DEV_CLR_UNREFERENCED(&t_mp->sbm_cm);
DR_DEV_CLR_RELEASED(&t_mp->sbm_cm);
dr_device_transition(&t_mp->sbm_cm, DR_STATE_CONFIGURED);
}
/*
* clean up (source) board's mem unit structure.
* NOTE: sbm_mlist is retained if no error has been record (in other
* words, when s_mp->sbm_cm.sbdev_error is NULL). This memlist is
* referred to elsewhere as the cached memlist. The cached memlist
* is used to re-attach (configure back in) this memunit from the
* unconfigured state. The memlist is retained because it may
* represent bad pages that were detected while the memory was
* configured into the OS. The OS deletes bad pages from phys_install.
* Those deletes, if any, will be represented in the cached mlist.
*/
if (s_mp->sbm_del_mlist && s_mp->sbm_del_mlist != s_mp->sbm_mlist)
memlist_delete(s_mp->sbm_del_mlist);
if (s_mp->sbm_cm.sbdev_error && s_mp->sbm_mlist) {
memlist_delete(s_mp->sbm_mlist);
s_mp->sbm_mlist = NULL;
}
if (s_mp->sbm_dyn_segs != NULL && s_mp->sbm_cm.sbdev_error == 0) {
memlist_delete(s_mp->sbm_dyn_segs);
s_mp->sbm_dyn_segs = NULL;
}
s_mp->sbm_del_mlist = NULL;
s_mp->sbm_peer = NULL;
s_mp->sbm_flags = 0;
s_mp->sbm_cm.sbdev_busy = 0;
dr_init_mem_unit_data(s_mp);
PR_MEM("%s: cached memlist for %s:", f, s_mp->sbm_cm.sbdev_path);
PR_MEMLIST_DUMP(s_mp->sbm_mlist);
return (0);
}
/*
* Successful return from this function will have the memory
* handle in bp->b_dev[..mem-unit...].sbm_memhandle allocated
* and waiting. This routine's job is to select the memory that
* actually has to be released (detached) which may not necessarily
* be the same memory node that came in in devlist[],
* i.e. a copy-rename is needed.
*/
int
dr_pre_release_mem(dr_handle_t *hp, dr_common_unit_t **devlist, int devnum)
{
int d;
int err_flag = 0;
static fn_t f = "dr_pre_release_mem";
PR_MEM("%s...\n", f);
for (d = 0; d < devnum; d++) {
dr_mem_unit_t *mp = (dr_mem_unit_t *)devlist[d];
int rv;
memquery_t mq;
struct memlist *ml;
if (mp->sbm_cm.sbdev_error) {
err_flag = 1;
continue;
} else if (!kcage_on) {
dr_dev_err(CE_WARN, &mp->sbm_cm, ESBD_KCAGE_OFF);
err_flag = 1;
continue;
}
if (mp->sbm_flags & DR_MFLAG_RESERVED) {
/*
* Board is currently involved in a delete
* memory operation. Can't detach this guy until
* that operation completes.
*/
dr_dev_err(CE_WARN, &mp->sbm_cm, ESBD_INVAL);
err_flag = 1;
break;
}
/*
* Check whether the detaching memory requires a
* copy-rename.
*/
ASSERT(mp->sbm_npages != 0);
rv = kphysm_del_span_query(mp->sbm_basepfn, mp->sbm_npages,
&mq);
if (rv != KPHYSM_OK) {
DR_DEV_INTERNAL_ERROR(&mp->sbm_cm);
err_flag = 1;
break;
}
if (mq.nonrelocatable != 0) {
if (!(dr_cmd_flags(hp) &
(SBD_FLAG_FORCE | SBD_FLAG_QUIESCE_OKAY))) {
/* caller wasn't prompted for a suspend */
dr_dev_err(CE_WARN, &mp->sbm_cm,
ESBD_QUIESCE_REQD);
err_flag = 1;
break;
}
}
/* flags should be clean at this time */
ASSERT(mp->sbm_flags == 0);
ASSERT(mp->sbm_mlist == NULL); /* should be null */
ASSERT(mp->sbm_del_mlist == NULL); /* should be null */
if (mp->sbm_mlist != NULL) {
memlist_delete(mp->sbm_mlist);
mp->sbm_mlist = NULL;
}
ml = dr_get_memlist(mp);
if (ml == NULL) {
err_flag = 1;
PR_MEM("%s: no memlist found for %s\n",
f, mp->sbm_cm.sbdev_path);
continue;
}
/* allocate a kphysm handle */
rv = kphysm_del_gethandle(&mp->sbm_memhandle);
if (rv != KPHYSM_OK) {
memlist_delete(ml);
DR_DEV_INTERNAL_ERROR(&mp->sbm_cm);
err_flag = 1;
break;
}
mp->sbm_flags |= DR_MFLAG_RELOWNER;
if ((mq.nonrelocatable != 0) ||
dr_reserve_mem_spans(&mp->sbm_memhandle, ml)) {
/*
* Either the detaching memory node contains
* non-reloc memory or we failed to reserve the
* detaching memory node (which did _not_ have
* any non-reloc memory, i.e. some non-reloc mem
* got onboard).
*/
if (dr_select_mem_target(hp, mp, ml)) {
int rv;
/*
* We had no luck locating a target
* memory node to be the recipient of
* the non-reloc memory on the node
* we're trying to detach.
* Clean up be disposing the mem handle
* and the mem list.
*/
rv = kphysm_del_release(mp->sbm_memhandle);
if (rv != KPHYSM_OK) {
/*
* can do nothing but complain
* and hope helpful for debug
*/
cmn_err(CE_WARN, "%s: unexpected"
" kphysm_del_release return"
" value %d",
f, rv);
}
mp->sbm_flags &= ~DR_MFLAG_RELOWNER;
memlist_delete(ml);
/* make sure sbm_flags is clean */
ASSERT(mp->sbm_flags == 0);
dr_dev_err(CE_WARN, &mp->sbm_cm,
ESBD_NO_TARGET);
err_flag = 1;
break;
}
/*
* ml is not memlist_delete'd here because
* it has been assigned to mp->sbm_mlist
* by dr_select_mem_target.
*/
} else {
/* no target needed to detach this board */
mp->sbm_flags |= DR_MFLAG_RESERVED;
mp->sbm_peer = NULL;
mp->sbm_del_mlist = ml;
mp->sbm_mlist = ml;
mp->sbm_cm.sbdev_busy = 1;
}
#ifdef DEBUG
ASSERT(mp->sbm_mlist != NULL);
if (mp->sbm_flags & DR_MFLAG_SOURCE) {
PR_MEM("%s: release of %s requires copy/rename;"
" selected target board %s\n",
f,
mp->sbm_cm.sbdev_path,
mp->sbm_peer->sbm_cm.sbdev_path);
} else {
PR_MEM("%s: copy/rename not required to release %s\n",
f, mp->sbm_cm.sbdev_path);
}
ASSERT(mp->sbm_flags & DR_MFLAG_RELOWNER);
ASSERT(mp->sbm_flags & DR_MFLAG_RESERVED);
#endif
}
return (err_flag ? -1 : 0);
}
void
dr_release_mem_done(dr_common_unit_t *cp)
{
dr_mem_unit_t *s_mp = (dr_mem_unit_t *)cp;
dr_mem_unit_t *t_mp, *mp;
int rv;
static fn_t f = "dr_release_mem_done";
/*
* This unit will be flagged with DR_MFLAG_SOURCE, if it
* has a target unit.
*/
if (s_mp->sbm_flags & DR_MFLAG_SOURCE) {
t_mp = s_mp->sbm_peer;
ASSERT(t_mp != NULL);
ASSERT(t_mp->sbm_peer == s_mp);
ASSERT(t_mp->sbm_flags & DR_MFLAG_TARGET);
ASSERT(t_mp->sbm_flags & DR_MFLAG_RESERVED);
} else {
/* this is no target unit */
t_mp = NULL;
}
/* free delete handle */
ASSERT(s_mp->sbm_flags & DR_MFLAG_RELOWNER);
ASSERT(s_mp->sbm_flags & DR_MFLAG_RESERVED);
rv = kphysm_del_release(s_mp->sbm_memhandle);
if (rv != KPHYSM_OK) {
/*
* can do nothing but complain
* and hope helpful for debug
*/
cmn_err(CE_WARN, "%s: unexpected kphysm_del_release"
" return value %d", f, rv);
}
s_mp->sbm_flags &= ~DR_MFLAG_RELOWNER;
/*
* If an error was encountered during release, clean up
* the source (and target, if present) unit data.
*/
/* XXX Can we know that sbdev_error was encountered during release? */
if (s_mp->sbm_cm.sbdev_error != NULL) {
PR_MEM("%s: %s: error %d noted\n",
f,
s_mp->sbm_cm.sbdev_path,
s_mp->sbm_cm.sbdev_error->e_code);
if (t_mp != NULL) {
ASSERT(t_mp->sbm_del_mlist == t_mp->sbm_mlist);
t_mp->sbm_del_mlist = NULL;
if (t_mp->sbm_mlist != NULL) {
memlist_delete(t_mp->sbm_mlist);
t_mp->sbm_mlist = NULL;
}
t_mp->sbm_peer = NULL;
t_mp->sbm_flags = 0;
t_mp->sbm_cm.sbdev_busy = 0;
}
if (s_mp->sbm_del_mlist != s_mp->sbm_mlist)
memlist_delete(s_mp->sbm_del_mlist);
s_mp->sbm_del_mlist = NULL;
if (s_mp->sbm_mlist != NULL) {
memlist_delete(s_mp->sbm_mlist);
s_mp->sbm_mlist = NULL;
}
s_mp->sbm_peer = NULL;
s_mp->sbm_flags = 0;
s_mp->sbm_cm.sbdev_busy = 0;
/* bail out */
return;
}
DR_DEV_SET_RELEASED(&s_mp->sbm_cm);
dr_device_transition(&s_mp->sbm_cm, DR_STATE_RELEASE);
if (t_mp != NULL) {
/*
* the kphysm delete operation that drained the source
* board also drained this target board. Since the source
* board drain is now known to have succeeded, we know this
* target board is drained too.
*
* because DR_DEV_SET_RELEASED and dr_device_transition
* is done here, the dr_release_dev_done should not
* fail.
*/
DR_DEV_SET_RELEASED(&t_mp->sbm_cm);
dr_device_transition(&t_mp->sbm_cm, DR_STATE_RELEASE);
/*
* NOTE: do not transition target's board state,
* even if the mem-unit was the last configure
* unit of the board. When copy/rename completes
* this mem-unit will transitioned back to
* the configured state. In the meantime, the
* board's must remain as is.
*/
}
/* if board(s) had deleted memory, verify it is gone */
rv = 0;
memlist_read_lock();
if (s_mp->sbm_del_mlist != NULL) {
mp = s_mp;
rv = memlist_intersect(phys_install, mp->sbm_del_mlist);
}
if (rv == 0 && t_mp && t_mp->sbm_del_mlist != NULL) {
mp = t_mp;
rv = memlist_intersect(phys_install, mp->sbm_del_mlist);
}
memlist_read_unlock();
if (rv) {
cmn_err(CE_WARN, "%s: %smem-unit (%d.%d): "
"deleted memory still found in phys_install",
f,
(mp == t_mp ? "target " : ""),
mp->sbm_cm.sbdev_bp->b_num,
mp->sbm_cm.sbdev_unum);
DR_DEV_INTERNAL_ERROR(&s_mp->sbm_cm);
return;
}
s_mp->sbm_flags |= DR_MFLAG_RELDONE;
if (t_mp != NULL)
t_mp->sbm_flags |= DR_MFLAG_RELDONE;
/* this should not fail */
if (dr_release_dev_done(&s_mp->sbm_cm) != 0) {
/* catch this in debug kernels */
ASSERT(0);
return;
}
PR_MEM("%s: marking %s release DONE\n",
f, s_mp->sbm_cm.sbdev_path);
s_mp->sbm_cm.sbdev_ostate = SBD_STAT_UNCONFIGURED;
if (t_mp != NULL) {
/* should not fail */
rv = dr_release_dev_done(&t_mp->sbm_cm);
if (rv != 0) {
/* catch this in debug kernels */
ASSERT(0);
return;
}
PR_MEM("%s: marking %s release DONE\n",
f, t_mp->sbm_cm.sbdev_path);
t_mp->sbm_cm.sbdev_ostate = SBD_STAT_UNCONFIGURED;
}
}
/*ARGSUSED*/
int
dr_disconnect_mem(dr_mem_unit_t *mp)
{
static fn_t f = "dr_disconnect_mem";
update_membounds_t umb;
#ifdef DEBUG
int state = mp->sbm_cm.sbdev_state;
ASSERT(state == DR_STATE_CONNECTED || state == DR_STATE_UNCONFIGURED);
#endif
PR_MEM("%s...\n", f);
if (mp->sbm_del_mlist && mp->sbm_del_mlist != mp->sbm_mlist)
memlist_delete(mp->sbm_del_mlist);
mp->sbm_del_mlist = NULL;
if (mp->sbm_mlist) {
memlist_delete(mp->sbm_mlist);
mp->sbm_mlist = NULL;
}
/*
* Remove memory from lgroup
* For now, only board info is required.
*/
umb.u_board = mp->sbm_cm.sbdev_bp->b_num;
umb.u_base = (uint64_t)-1;
umb.u_len = (uint64_t)-1;
lgrp_plat_config(LGRP_CONFIG_MEM_DEL, (uintptr_t)&umb);
return (0);
}
int
dr_cancel_mem(dr_mem_unit_t *s_mp)
{
dr_mem_unit_t *t_mp;
dr_state_t state;
static fn_t f = "dr_cancel_mem";
state = s_mp->sbm_cm.sbdev_state;
if (s_mp->sbm_flags & DR_MFLAG_TARGET) {
/* must cancel source board, not target board */
/* TODO: set error */
return (-1);
} else if (s_mp->sbm_flags & DR_MFLAG_SOURCE) {
t_mp = s_mp->sbm_peer;
ASSERT(t_mp != NULL);
ASSERT(t_mp->sbm_peer == s_mp);
/* must always match the source board's state */
/* TODO: is this assertion correct? */
ASSERT(t_mp->sbm_cm.sbdev_state == state);
} else {
/* this is no target unit */
t_mp = NULL;
}
switch (state) {
case DR_STATE_UNREFERENCED: /* state set by dr_release_dev_done */
ASSERT((s_mp->sbm_flags & DR_MFLAG_RELOWNER) == 0);
if (t_mp != NULL && t_mp->sbm_del_mlist != NULL) {
PR_MEM("%s: undoing target %s memory delete\n",
f, t_mp->sbm_cm.sbdev_path);
dr_add_memory_spans(t_mp, t_mp->sbm_del_mlist);
DR_DEV_CLR_UNREFERENCED(&t_mp->sbm_cm);
}
if (s_mp->sbm_del_mlist != NULL) {
PR_MEM("%s: undoing %s memory delete\n",
f, s_mp->sbm_cm.sbdev_path);
dr_add_memory_spans(s_mp, s_mp->sbm_del_mlist);
}
/*FALLTHROUGH*/
/* TODO: should no longer be possible to see the release state here */
case DR_STATE_RELEASE: /* state set by dr_release_mem_done */
ASSERT((s_mp->sbm_flags & DR_MFLAG_RELOWNER) == 0);
if (t_mp != NULL) {
ASSERT(t_mp->sbm_del_mlist == t_mp->sbm_mlist);
t_mp->sbm_del_mlist = NULL;
if (t_mp->sbm_mlist != NULL) {
memlist_delete(t_mp->sbm_mlist);
t_mp->sbm_mlist = NULL;
}
t_mp->sbm_peer = NULL;
t_mp->sbm_flags = 0;
t_mp->sbm_cm.sbdev_busy = 0;
dr_init_mem_unit_data(t_mp);
DR_DEV_CLR_RELEASED(&t_mp->sbm_cm);
dr_device_transition(&t_mp->sbm_cm,
DR_STATE_CONFIGURED);
}
if (s_mp->sbm_del_mlist != s_mp->sbm_mlist)
memlist_delete(s_mp->sbm_del_mlist);
s_mp->sbm_del_mlist = NULL;
if (s_mp->sbm_mlist != NULL) {
memlist_delete(s_mp->sbm_mlist);
s_mp->sbm_mlist = NULL;
}
s_mp->sbm_peer = NULL;
s_mp->sbm_flags = 0;
s_mp->sbm_cm.sbdev_busy = 0;
dr_init_mem_unit_data(s_mp);
return (0);
default:
PR_MEM("%s: WARNING unexpected state (%d) for %s\n",
f, (int)state, s_mp->sbm_cm.sbdev_path);
return (-1);
}
/*NOTREACHED*/
}
void
dr_init_mem_unit(dr_mem_unit_t *mp)
{
dr_state_t new_state;
if (DR_DEV_IS_ATTACHED(&mp->sbm_cm)) {
new_state = DR_STATE_CONFIGURED;
mp->sbm_cm.sbdev_cond = SBD_COND_OK;
} else if (DR_DEV_IS_PRESENT(&mp->sbm_cm)) {
new_state = DR_STATE_CONNECTED;
mp->sbm_cm.sbdev_cond = SBD_COND_OK;
} else if (mp->sbm_cm.sbdev_id != (drmachid_t)0) {
new_state = DR_STATE_OCCUPIED;
} else {
new_state = DR_STATE_EMPTY;
}
if (DR_DEV_IS_PRESENT(&mp->sbm_cm))
dr_init_mem_unit_data(mp);
/* delay transition until fully initialized */
dr_device_transition(&mp->sbm_cm, new_state);
}
static void
dr_init_mem_unit_data(dr_mem_unit_t *mp)
{
drmachid_t id = mp->sbm_cm.sbdev_id;
uint64_t bytes;
sbd_error_t *err;
static fn_t f = "dr_init_mem_unit_data";
update_membounds_t umb;
PR_MEM("%s...\n", f);
/* a little sanity checking */
ASSERT(mp->sbm_peer == NULL);
ASSERT(mp->sbm_flags == 0);
/* get basepfn of mem unit */
err = drmach_mem_get_base_physaddr(id, &bytes);
if (err) {
DRERR_SET_C(&mp->sbm_cm.sbdev_error, &err);
mp->sbm_basepfn = (pfn_t)-1;
} else
mp->sbm_basepfn = _b64top(bytes);
/* attempt to get number of pages from PDA */
err = drmach_mem_get_size(id, &bytes);
if (err) {
DRERR_SET_C(&mp->sbm_cm.sbdev_error, &err);
mp->sbm_npages = 0;
} else
mp->sbm_npages = _b64top(bytes);
/* if didn't work, calculate using memlist */
if (mp->sbm_npages == 0) {
struct memlist *ml, *mlist;
/*
* Either we couldn't open the PDA or our
* PDA has garbage in it. We must have the
* page count consistent and whatever the
* OS states has precedence over the PDA
* so let's check the kernel.
*/
/* TODO: curious comment. it suggests pda query should happen if this fails */
PR_MEM("%s: PDA query failed for npages."
" Checking memlist for %s\n",
f, mp->sbm_cm.sbdev_path);
mlist = dr_get_memlist(mp);
for (ml = mlist; ml; ml = ml->next)
mp->sbm_npages += btop(ml->size);
memlist_delete(mlist);
}
err = drmach_mem_get_alignment(id, &bytes);
if (err) {
DRERR_SET_C(&mp->sbm_cm.sbdev_error, &err);
mp->sbm_alignment_mask = 0;
} else
mp->sbm_alignment_mask = _b64top(bytes);
err = drmach_mem_get_slice_size(id, &bytes);
if (err) {
DRERR_SET_C(&mp->sbm_cm.sbdev_error, &err);
mp->sbm_slice_size = 0; /* paranoia */
} else
mp->sbm_slice_size = bytes;
/*
* Add memory to lgroup
*/
umb.u_board = mp->sbm_cm.sbdev_bp->b_num;
umb.u_base = (uint64_t)mp->sbm_basepfn << MMU_PAGESHIFT;
umb.u_len = (uint64_t)mp->sbm_npages << MMU_PAGESHIFT;
lgrp_plat_config(LGRP_CONFIG_MEM_ADD, (uintptr_t)&umb);
PR_MEM("%s: %s (basepfn = 0x%lx, npgs = %ld)\n",
f, mp->sbm_cm.sbdev_path, mp->sbm_basepfn, mp->sbm_npages);
}
static int
dr_reserve_mem_spans(memhandle_t *mhp, struct memlist *ml)
{
int err;
pfn_t base;
pgcnt_t npgs;
struct memlist *mc;
static fn_t f = "dr_reserve_mem_spans";
PR_MEM("%s...\n", f);
/*
* Walk the supplied memlist scheduling each span for removal
* with kphysm_del_span. It is possible that a span may intersect
* an area occupied by the cage.
*/
for (mc = ml; mc != NULL; mc = mc->next) {
base = _b64top(mc->address);
npgs = _b64top(mc->size);
err = kphysm_del_span(*mhp, base, npgs);
if (err != KPHYSM_OK) {
cmn_err(CE_WARN, "%s memory reserve failed."
" unexpected kphysm_del_span return value %d;"
" basepfn=0x%lx npages=%ld",
f, err, base, npgs);
return (-1);
}
}
return (0);
}
/* debug counters */
int dr_smt_realigned;
int dr_smt_preference[4];
#ifdef DEBUG
uint_t dr_ignore_board; /* if bit[bnum-1] set, board won't be candidate */
#endif
/*
* Find and reserve a copy/rename target board suitable for the
* given source board.
* All boards in the system are examined and categorized in relation to
* their memory size versus the source board's memory size. Order of
* preference is:
* 1st: board has same memory size
* 2nd: board has larger memory size
* 3rd: board has smaller memory size
* 4th: board has smaller memory size, available memory will be reduced.
* Boards in category 3 and 4 will have their MC's reprogrammed to locate the
* span to which the MC responds to address span that appropriately covers
* the nonrelocatable span of the source board.
*/
static int
dr_select_mem_target(dr_handle_t *hp,
dr_mem_unit_t *s_mp, struct memlist *s_ml)
{
pgcnt_t sz = _b64top(s_mp->sbm_slice_size);
pgcnt_t sm = sz - 1; /* mem_slice_mask */
pfn_t s_phi, t_phi;
int n_sets = 4; /* same, larger, smaller, clipped */
int preference; /* lower value is higher preference */
int n_units_per_set;
int idx;
dr_mem_unit_t **sets;
int t_bd;
int t_unit;
int rv;
int allow_src_memrange_modify;
int allow_targ_memrange_modify;
drmachid_t t_id;
dr_board_t *s_bp, *t_bp;
dr_mem_unit_t *t_mp, *c_mp;
struct memlist *d_ml, *t_ml, *x_ml;
memquery_t s_mq = {0};
static fn_t f = "dr_select_mem_target";
PR_MEM("%s...\n", f);
ASSERT(s_ml != NULL);
n_units_per_set = MAX_BOARDS * MAX_MEM_UNITS_PER_BOARD;
sets = GETSTRUCT(dr_mem_unit_t *, n_units_per_set * n_sets);
s_bp = hp->h_bd;
/* calculate the offset into the slice of the last source board pfn */
ASSERT(s_mp->sbm_npages != 0);
s_phi = (s_mp->sbm_basepfn + s_mp->sbm_npages - 1) & sm;
allow_src_memrange_modify = drmach_allow_memrange_modify(s_bp->b_id);
/*
* Make one pass through all memory units on all boards
* and categorize them with respect to the source board.
*/
for (t_bd = 0; t_bd < MAX_BOARDS; t_bd++) {
/*
* The board structs are a contiguous array
* so we take advantage of that to find the
* correct board struct pointer for a given
* board number.
*/
t_bp = dr_lookup_board(t_bd);
/* source board can not be its own target */
if (s_bp->b_num == t_bp->b_num)
continue;
for (t_unit = 0; t_unit < MAX_MEM_UNITS_PER_BOARD; t_unit++) {
t_mp = dr_get_mem_unit(t_bp, t_unit);
/* this memory node must be attached */
if (!DR_DEV_IS_ATTACHED(&t_mp->sbm_cm))
continue;
/* source unit can not be its own target */
if (s_mp == t_mp) {
/* catch this is debug kernels */
ASSERT(0);
continue;
}
/*
* this memory node must not already be reserved
* by some other memory delete operation.
*/
if (t_mp->sbm_flags & DR_MFLAG_RESERVED)
continue;
/*
* categorize the memory node
* If this is a smaller memory node, create a
* temporary, edited copy of the source board's
* memlist containing only the span of the non-
* relocatable pages.
*/
t_phi = (t_mp->sbm_basepfn + t_mp->sbm_npages - 1) & sm;
t_id = t_mp->sbm_cm.sbdev_bp->b_id;
allow_targ_memrange_modify =
drmach_allow_memrange_modify(t_id);
if (t_mp->sbm_npages == s_mp->sbm_npages &&
t_phi == s_phi) {
preference = 0;
t_mp->sbm_slice_offset = 0;
} else if (t_mp->sbm_npages > s_mp->sbm_npages &&
t_phi > s_phi) {
/*
* Selecting this target will require modifying
* the source and/or target physical address
* ranges. Skip if not supported by platform.
*/
if (!allow_src_memrange_modify ||
!allow_targ_memrange_modify) {
PR_MEM("%s: skip target %s, memory "
"range relocation not supported "
"by platform\n", f,
t_mp->sbm_cm.sbdev_path);
continue;
}
preference = 1;
t_mp->sbm_slice_offset = 0;
} else {
pfn_t pfn = 0;
/*
* Selecting this target will require modifying
* the source and/or target physical address
* ranges. Skip if not supported by platform.
*/
if (!allow_src_memrange_modify ||
!allow_targ_memrange_modify) {
PR_MEM("%s: skip target %s, memory "
"range relocation not supported "
"by platform\n", f,
t_mp->sbm_cm.sbdev_path);
continue;
}
/*
* Check if its mc can be programmed to relocate
* the active address range to match the
* nonrelocatable span of the source board.
*/
preference = 2;
if (s_mq.phys_pages == 0) {
/*
* find non-relocatable span on
* source board.
*/
rv = kphysm_del_span_query(
s_mp->sbm_basepfn,
s_mp->sbm_npages, &s_mq);
if (rv != KPHYSM_OK) {
PR_MEM("%s: %s: unexpected"
" kphysm_del_span_query"
" return value %d;"
" basepfn 0x%lx,"
" npages %ld\n",
f,
s_mp->sbm_cm.sbdev_path,
rv,
s_mp->sbm_basepfn,
s_mp->sbm_npages);
/* paranoia */
s_mq.phys_pages = 0;
continue;
}
/* more paranoia */
ASSERT(s_mq.phys_pages != 0);
ASSERT(s_mq.nonrelocatable != 0);
/*
* this should not happen
* if it does, it simply means that
* we can not proceed with qualifying
* this target candidate.
*/
if (s_mq.nonrelocatable == 0)
continue;
PR_MEM("%s: %s: nonrelocatable"
" span (0x%lx..0x%lx)\n",
f,
s_mp->sbm_cm.sbdev_path,
s_mq.first_nonrelocatable,
s_mq.last_nonrelocatable);
}
/*
* Round down the starting pfn of the
* nonrelocatable span on the source board
* to nearest programmable boundary possible
* with this target candidate.
*/
pfn = s_mq.first_nonrelocatable &
~t_mp->sbm_alignment_mask;
/* skip candidate if memory is too small */
if (pfn + t_mp->sbm_npages <
s_mq.last_nonrelocatable)
continue;
/*
* reprogramming an mc to relocate its
* active address range means the beginning
* address to which the DIMMS respond will
* be somewhere above the slice boundary
* address. The larger the size of memory
* on this unit, the more likely part of it
* will exist beyond the end of the slice.
* The portion of the memory that does is
* unavailable to the system until the mc
* reprogrammed to a more favorable base
* address.
* An attempt is made to avoid the loss by
* recalculating the mc base address relative
* to the end of the slice. This may produce
* a more favorable result. If not, we lower
* the board's preference rating so that it
* is one the last candidate boards to be
* considered.
*/
if ((pfn + t_mp->sbm_npages) & ~sm) {
pfn_t p;
ASSERT(sz >= t_mp->sbm_npages);
/*
* calculate an alternative starting
* address relative to the end of the
* slice's address space.
*/
p = pfn & ~sm;
p = p + (sz - t_mp->sbm_npages);
p = p & ~t_mp->sbm_alignment_mask;
if ((p > s_mq.first_nonrelocatable) ||
(p + t_mp->sbm_npages <
s_mq.last_nonrelocatable)) {
/*
* alternative starting addr
* won't work. Lower preference
* rating of this board, since
* some number of pages will
* unavailable for use.
*/
preference = 3;
} else {
dr_smt_realigned++;
pfn = p;
}
}
/*
* translate calculated pfn to an offset
* relative to the slice boundary. If the
* candidate board is selected, this offset
* will be used to calculate the values
* programmed into the mc.
*/
t_mp->sbm_slice_offset = pfn & sm;
PR_MEM("%s: %s:"
" proposed mc offset 0x%lx\n",
f,
t_mp->sbm_cm.sbdev_path,
t_mp->sbm_slice_offset);
}
dr_smt_preference[preference]++;
/* calculate index to start of preference set */
idx = n_units_per_set * preference;
/* calculate offset to respective element */
idx += t_bd * MAX_MEM_UNITS_PER_BOARD + t_unit;
ASSERT(idx < n_units_per_set * n_sets);
sets[idx] = t_mp;
}
}
/*
* NOTE: this would be a good place to sort each candidate
* set in to some desired order, e.g. memory size in ascending
* order. Without an additional sorting step here, the order
* within a set is ascending board number order.
*/
c_mp = NULL;
x_ml = NULL;
t_ml = NULL;
for (idx = 0; idx < n_units_per_set * n_sets; idx++) {
memquery_t mq;
/* cleanup t_ml after previous pass */
if (t_ml != NULL) {
memlist_delete(t_ml);
t_ml = NULL;
}
/* get candidate target board mem unit */
t_mp = sets[idx];
if (t_mp == NULL)
continue;
/* get target board memlist */
t_ml = dr_get_memlist(t_mp);
if (t_ml == NULL) {
cmn_err(CE_WARN, "%s: no memlist for"
" mem-unit %d, board %d",
f,
t_mp->sbm_cm.sbdev_bp->b_num,
t_mp->sbm_cm.sbdev_unum);
continue;
}
/* get appropriate source board memlist */
t_phi = (t_mp->sbm_basepfn + t_mp->sbm_npages - 1) & sm;
if (t_mp->sbm_npages < s_mp->sbm_npages || t_phi < s_phi) {
spgcnt_t excess;
/*
* make a copy of the source board memlist
* then edit it to remove the spans that
* are outside the calculated span of
* [pfn..s_mq.last_nonrelocatable].
*/
if (x_ml != NULL)
memlist_delete(x_ml);
x_ml = memlist_dup(s_ml);
if (x_ml == NULL) {
PR_MEM("%s: memlist_dup failed\n", f);
/* TODO: should abort */
continue;
}
/* trim off lower portion */
excess = t_mp->sbm_slice_offset -
(s_mp->sbm_basepfn & sm);
if (excess > 0) {
x_ml = memlist_del_span(
x_ml,
_ptob64(s_mp->sbm_basepfn),
_ptob64(excess));
}
ASSERT(x_ml);
/*
* Since this candidate target board is smaller
* than the source board, s_mq must have been
* initialized in previous loop while processing
* this or some other candidate board.
* FIXME: this is weak.
*/
ASSERT(s_mq.phys_pages != 0);
/* trim off upper portion */
excess = (s_mp->sbm_basepfn + s_mp->sbm_npages)
- (s_mq.last_nonrelocatable + 1);
if (excess > 0) {
pfn_t p;
p = s_mq.last_nonrelocatable + 1;
x_ml = memlist_del_span(
x_ml,
_ptob64(p),
_ptob64(excess));
}
PR_MEM("%s: %s: edited source memlist:\n",
f, s_mp->sbm_cm.sbdev_path);
PR_MEMLIST_DUMP(x_ml);
#ifdef DEBUG
/* sanity check memlist */
d_ml = x_ml;
while (d_ml->next != NULL)
d_ml = d_ml->next;
ASSERT(d_ml->address + d_ml->size ==
_ptob64(s_mq.last_nonrelocatable + 1));
#endif
/*
* x_ml now describes only the portion of the
* source board that will be moved during the
* copy/rename operation.
*/
d_ml = x_ml;
} else {
/* use original memlist; all spans will be moved */
d_ml = s_ml;
}
/* verify target can support source memory spans. */
if (memlist_canfit(d_ml, t_ml) == 0) {
PR_MEM("%s: source memlist won't"
" fit in target memlist\n", f);
PR_MEM("%s: source memlist:\n", f);
PR_MEMLIST_DUMP(d_ml);
PR_MEM("%s: target memlist:\n", f);
PR_MEMLIST_DUMP(t_ml);
continue;
}
/* NOTE: the value of d_ml is not used beyond this point */
PR_MEM("%s: checking for no-reloc in %s, "
" basepfn=0x%lx, npages=%ld\n",
f,
t_mp->sbm_cm.sbdev_path,
t_mp->sbm_basepfn,
t_mp->sbm_npages);
rv = kphysm_del_span_query(
t_mp->sbm_basepfn, t_mp->sbm_npages, &mq);
if (rv != KPHYSM_OK) {
PR_MEM("%s: kphysm_del_span_query:"
" unexpected return value %d\n", f, rv);
continue;
}
if (mq.nonrelocatable != 0) {
PR_MEM("%s: candidate %s has"
" nonrelocatable span [0x%lx..0x%lx]\n",
f,
t_mp->sbm_cm.sbdev_path,
mq.first_nonrelocatable,
mq.last_nonrelocatable);
continue;
}
#ifdef DEBUG
/*
* This is a debug tool for excluding certain boards
* from being selected as a target board candidate.
* dr_ignore_board is only tested by this driver.
* It must be set with adb, obp, /etc/system or your
* favorite debugger.
*/
if (dr_ignore_board &
(1 << (t_mp->sbm_cm.sbdev_bp->b_num - 1))) {
PR_MEM("%s: dr_ignore_board flag set,"
" ignoring %s as candidate\n",
f, t_mp->sbm_cm.sbdev_path);
continue;
}
#endif
/*
* Reserve excess source board memory, if any.
*
* When the number of pages on the candidate target
* board is less than the number of pages on the source,
* then some spans (clearly) of the source board's address
* space will not be covered by physical memory after the
* copy/rename completes. The following code block
* schedules those spans to be deleted.
*/
if (t_mp->sbm_npages < s_mp->sbm_npages || t_phi < s_phi) {
pfn_t pfn;
uint64_t s_del_pa;
struct memlist *ml;
d_ml = memlist_dup(s_ml);
if (d_ml == NULL) {
PR_MEM("%s: cant dup src brd memlist\n", f);
/* TODO: should abort */
continue;
}
/* calculate base pfn relative to target board */
pfn = s_mp->sbm_basepfn & ~sm;
pfn += t_mp->sbm_slice_offset;
/*
* cannot split dynamically added segment
*/
s_del_pa = _ptob64(pfn + t_mp->sbm_npages);
PR_MEM("%s: proposed src delete pa=0x%lx\n", f,
s_del_pa);
PR_MEM("%s: checking for split of dyn seg list:\n", f);
PR_MEMLIST_DUMP(s_mp->sbm_dyn_segs);
for (ml = s_mp->sbm_dyn_segs; ml; ml = ml->next) {
if (s_del_pa > ml->address &&
s_del_pa < ml->address + ml->size) {
s_del_pa = ml->address;
break;
}
}
/* remove span that will reside on candidate board */
d_ml = memlist_del_span(d_ml, _ptob64(pfn),
s_del_pa - _ptob64(pfn));
PR_MEM("%s: %s: reserving src brd memlist:\n",
f, s_mp->sbm_cm.sbdev_path);
PR_MEMLIST_DUMP(d_ml);
/* reserve excess spans */
if (dr_reserve_mem_spans(&s_mp->sbm_memhandle, d_ml)
!= 0) {
/* likely more non-reloc pages appeared */
/* TODO: restart from top? */
continue;
}
} else {
/* no excess source board memory */
d_ml = NULL;
}
s_mp->sbm_flags |= DR_MFLAG_RESERVED;
/*
* reserve all memory on target board.
* NOTE: source board's memhandle is used.
*
* If this succeeds (eq 0), then target selection is
* complete and all unwanted memory spans, both source and
* target, have been reserved. Loop is terminated.
*/
if (dr_reserve_mem_spans(&s_mp->sbm_memhandle, t_ml) == 0) {
PR_MEM("%s: %s: target board memory reserved\n",
f, t_mp->sbm_cm.sbdev_path);
/* a candidate target board is now reserved */
t_mp->sbm_flags |= DR_MFLAG_RESERVED;
c_mp = t_mp;
/* *** EXITING LOOP *** */
break;
}
/* did not successfully reserve the target board. */
PR_MEM("%s: could not reserve target %s\n",
f, t_mp->sbm_cm.sbdev_path);
/*
* NOTE: an undo of the dr_reserve_mem_span work
* will happen automatically when the memhandle
* (s_mp->sbm_memhandle) is kphysm_del_release'd.
*/
s_mp->sbm_flags &= ~DR_MFLAG_RESERVED;
}
/* clean up after memlist editing logic */
if (x_ml != NULL)
memlist_delete(x_ml);
FREESTRUCT(sets, dr_mem_unit_t *, n_units_per_set * n_sets);
/*
* c_mp will be NULL when the entire sets[] array
* has been searched without reserving a target board.
*/
if (c_mp == NULL) {
PR_MEM("%s: %s: target selection failed.\n",
f, s_mp->sbm_cm.sbdev_path);
if (t_ml != NULL)
memlist_delete(t_ml);
return (-1);
}
PR_MEM("%s: found target %s for source %s\n",
f,
c_mp->sbm_cm.sbdev_path,
s_mp->sbm_cm.sbdev_path);
s_mp->sbm_peer = c_mp;
s_mp->sbm_flags |= DR_MFLAG_SOURCE;
s_mp->sbm_del_mlist = d_ml; /* spans to be deleted, if any */
s_mp->sbm_mlist = s_ml;
s_mp->sbm_cm.sbdev_busy = 1;
c_mp->sbm_peer = s_mp;
c_mp->sbm_flags |= DR_MFLAG_TARGET;
c_mp->sbm_del_mlist = t_ml; /* spans to be deleted */
c_mp->sbm_mlist = t_ml;
c_mp->sbm_cm.sbdev_busy = 1;
s_mp->sbm_flags &= ~DR_MFLAG_MEMRESIZE;
if (c_mp->sbm_npages > s_mp->sbm_npages) {
s_mp->sbm_flags |= DR_MFLAG_MEMUPSIZE;
PR_MEM("%s: upsize detected (source=%ld < target=%ld)\n",
f, s_mp->sbm_npages, c_mp->sbm_npages);
} else if (c_mp->sbm_npages < s_mp->sbm_npages) {
s_mp->sbm_flags |= DR_MFLAG_MEMDOWNSIZE;
PR_MEM("%s: downsize detected (source=%ld > target=%ld)\n",
f, s_mp->sbm_npages, c_mp->sbm_npages);
}
return (0);
}
/*
* Memlist support.
*/
/*
* Determine whether the source memlist (s_mlist) will
* fit into the target memlist (t_mlist) in terms of
* size and holes (i.e. based on same relative base address).
*/
static int
memlist_canfit(struct memlist *s_mlist, struct memlist *t_mlist)
{
int rv = 0;
uint64_t s_basepa, t_basepa;
struct memlist *s_ml, *t_ml;
if ((s_mlist == NULL) || (t_mlist == NULL))
return (0);
/*
* Base both memlists on common base address (0).
*/
s_basepa = s_mlist->address;
t_basepa = t_mlist->address;
for (s_ml = s_mlist; s_ml; s_ml = s_ml->next)
s_ml->address -= s_basepa;
for (t_ml = t_mlist; t_ml; t_ml = t_ml->next)
t_ml->address -= t_basepa;
s_ml = s_mlist;
for (t_ml = t_mlist; t_ml && s_ml; t_ml = t_ml->next) {
uint64_t s_start, s_end;
uint64_t t_start, t_end;
t_start = t_ml->address;
t_end = t_start + t_ml->size;
for (; s_ml; s_ml = s_ml->next) {
s_start = s_ml->address;
s_end = s_start + s_ml->size;
if ((s_start < t_start) || (s_end > t_end))
break;
}
}
/*
* If we ran out of source memlist chunks that mean
* we found a home for all of them.
*/
if (s_ml == NULL)
rv = 1;
/*
* Need to add base addresses back since memlists
* are probably in use by caller.
*/
for (s_ml = s_mlist; s_ml; s_ml = s_ml->next)
s_ml->address += s_basepa;
for (t_ml = t_mlist; t_ml; t_ml = t_ml->next)
t_ml->address += t_basepa;
return (rv);
}