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/*-
* Copyright (c) 2006 Kip Macy
* 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.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <machine/hypervisorvar.h>
#include <machine/hv_api.h>
#include <machine/cddl/mdesc.h>
#include <machine/cddl/mdesc_impl.h>
static void mdesc_postvm_init(void *);
/*
* It doesn't really matter when this happens right now
* it just needs to happen before device initialization
* and after VM initialization. Later on we will end up
* doing this statically from pmap_bootstrap so that we
* can kill off all calls to OBP. OBP removal is not in
* the critical path for sun4v at this time.
*/
SYSINIT(mdesc_init, SI_SUB_CPU, SI_ORDER_FIRST, mdesc_postvm_init, NULL);
#define UNIMPLEMENTED panic("%s not implemented.", __FUNCTION__)
typedef struct mdesc_memops_ {
void *(*mm_buf_alloc)(size_t size, size_t align);
void (*mm_buf_free)(void *, size_t size);
void *(*mm_meta_alloc)(size_t size);
void (*mm_meta_free)(void *, size_t size);
} mdesc_memops_t;
typedef struct mdesc_ {
uint64_t md_gen; /* md-generation# */
struct mtx md_lock;
void *md_addr; /* address of raw MD */
uint64_t md_size; /* size of raw MD */
uint64_t md_buf_size; /* size of buffer allocated for MD */
int md_refcount; /* reference count */
mdesc_memops_t *md_memops; /* Memory operations for this MD */
} mdesc_t;
static mdesc_t *curr_mdesc = NULL;
static struct mtx curr_mdesc_lock;
static mdesc_memops_t *mdesc_memops;
static void *mdesc_boot_buf_alloc(size_t size, size_t align);
static void mdesc_boot_buf_free(void *buf, size_t align);
static void *mdesc_boot_meta_alloc(size_t size);
static void mdesc_boot_meta_free(void *buf, size_t size);
static void *mdesc_buf_alloc(size_t size, size_t align);
static void mdesc_buf_free(void *buf, size_t align);
static void *mdesc_meta_alloc(size_t size);
static void mdesc_meta_free(void *buf, size_t size);
static mdesc_memops_t mdesc_boot_memops = {
mdesc_boot_buf_alloc,
mdesc_boot_buf_free,
mdesc_boot_meta_alloc,
mdesc_boot_meta_free,
};
static mdesc_memops_t mdesc_generic_memops = {
mdesc_buf_alloc,
mdesc_buf_free,
mdesc_meta_alloc,
mdesc_meta_free,
};
static void *
mdesc_boot_buf_alloc(size_t size, size_t align)
{
UNIMPLEMENTED;
}
static void
mdesc_boot_buf_free(void *buf, size_t align)
{
UNIMPLEMENTED;
}
static void *
mdesc_boot_meta_alloc(size_t size)
{
UNIMPLEMENTED;
}
static void
mdesc_boot_meta_free(void *buf, size_t size)
{
UNIMPLEMENTED;
}
static void *
mdesc_buf_alloc(size_t size, size_t align)
{
return contigmalloc(size, M_MDPROP, M_WAITOK, phys_avail[0],
phys_avail[1], align, (1UL<<34));
}
static void
mdesc_buf_free(void *buf, size_t align)
{
contigfree(buf, PAGE_SIZE /*fix me*/, M_MDPROP);
}
static void *
mdesc_meta_alloc(size_t size)
{
return malloc(size, M_MDPROP, M_NOWAIT);
}
static void
mdesc_meta_free(void *buf, size_t size)
{
free(buf, M_MDPROP);
}
void
mdesc_init(void)
{
mtx_init(&curr_mdesc_lock, "current machine description lock", NULL, MTX_DEF);
mdesc_memops = &mdesc_boot_memops;
}
static void
mdesc_postvm_init(void *unused)
{
mdesc_memops = &mdesc_generic_memops;
}
static mdesc_t *
mdesc_alloc(void)
{
mdesc_t *mdp;
mdp = (mdesc_t *)(mdesc_memops->mm_meta_alloc)(sizeof(mdesc_t));
if (mdp != NULL) {
bzero(mdp, sizeof(*mdp));
mdp->md_memops = mdesc_memops;
mtx_init(&mdp->md_lock, "machine descriptor lock", NULL, MTX_DEF);
}
return (mdp);
}
int
mdesc_update(void)
{
uint64_t rv;
uint64_t mdesc_size, mdesc_buf_size = 0;
void *buf = NULL;
#ifdef notyet
uint64_t gen;
#endif
do {
if (buf != NULL)
(mdesc_memops->mm_buf_free)(buf, mdesc_buf_size);
mdesc_size = 0LL;
hv_mach_desc((uint64_t)0, &mdesc_size);
mdesc_size = mdesc_buf_size = round_page(mdesc_size);
if ((buf = (*mdesc_memops->mm_buf_alloc)(mdesc_buf_size, PAGE_SIZE)) == NULL) {
rv = -1;
goto done;
}
rv = hv_mach_desc(vtophys(buf), &mdesc_size);
if (rv != H_EOK && rv != H_EINVAL) {
rv = -1;
goto done;
}
} while (mdesc_size > mdesc_buf_size);
KASSERT(rv == H_EOK, ("unexpected return from hv_mach_desc"));
/* XXX we ignore the generation count... not all versions may
* support it
*/
if (curr_mdesc->md_refcount == 0) {
(*mdesc_memops->mm_buf_free) (curr_mdesc->md_addr, curr_mdesc->md_size);
} else {
panic("out of date machine description list not implemented");
}
mtx_lock(&curr_mdesc_lock);
#ifdef notyet
curr_mdesc->md_gen = gen;
#endif
curr_mdesc->md_addr = buf;
curr_mdesc->md_size = mdesc_size;
curr_mdesc->md_buf_size = mdesc_buf_size;
mtx_unlock(&curr_mdesc_lock);
return (rv);
done:
if (buf != NULL)
(*mdesc_memops->mm_buf_free)(buf, mdesc_buf_size);
return (rv);
}
md_t *
md_get(void)
{
md_t *mdp;
/*
* XXX This should actually happen in init
*/
if (curr_mdesc == NULL) {
if ((curr_mdesc = mdesc_alloc()) == NULL)
panic("machine description allocation failed");
if (mdesc_update())
panic("machine description update failed");
}
mtx_lock(&curr_mdesc_lock);
curr_mdesc->md_refcount++;
mdp = md_init_intern(curr_mdesc->md_addr,
curr_mdesc->md_memops->mm_meta_alloc,
curr_mdesc->md_memops->mm_meta_free);
mtx_unlock(&curr_mdesc_lock);
return (mdp);
}
void
md_put(md_t *ptr)
{
md_impl_t *mdp;
mdp = (md_impl_t *)ptr;
#ifdef notyet
mtx_lock(&curr_mdesc_lock)
/* XXX check against generation */
if (curr_mdesc->md_gen == mdp->md_gen) {
curr_mdesc->md_refcount--;
mtx_unlock(&curr_mdesc_lock)
goto done;
}
mtx_unlock(&curr_mdesc_lock);
/*
* MD is on the out of date list
*/
done:
#endif
/*
* We don't keep an out of date list currently
*/
mtx_lock(&curr_mdesc_lock);
curr_mdesc->md_refcount--;
mtx_unlock(&curr_mdesc_lock);
mdp->freep(mdp, sizeof(md_impl_t));
}
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