2006-10-05 06:14:28 +00:00
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/*-
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* Copyright (c) 2006 Kip Macy
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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2006-11-24 05:27:49 +00:00
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#include <machine/hypervisorvar.h>
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#include <machine/hv_api.h>
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2006-10-05 06:14:28 +00:00
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#include <machine/cddl/mdesc.h>
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#include <machine/cddl/mdesc_impl.h>
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static void mdesc_postvm_init(void *);
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/*
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* It doesn't really matter when this happens right now
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* it just needs to happen before device initialization
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* and after VM initialization. Later on we will end up
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* doing this statically from pmap_bootstrap so that we
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* can kill off all calls to OBP. OBP removal is not in
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* the critical path for sun4v at this time.
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*/
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2007-09-11 22:54:09 +00:00
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SYSINIT(mdesc_init, SI_SUB_CPU, SI_ORDER_SECOND, mdesc_postvm_init, NULL);
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2006-10-05 06:14:28 +00:00
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#define UNIMPLEMENTED panic("%s not implemented.", __FUNCTION__)
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typedef struct mdesc_memops_ {
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void *(*mm_buf_alloc)(size_t size, size_t align);
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void (*mm_buf_free)(void *, size_t size);
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void *(*mm_meta_alloc)(size_t size);
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void (*mm_meta_free)(void *, size_t size);
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} mdesc_memops_t;
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typedef struct mdesc_ {
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uint64_t md_gen; /* md-generation# */
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struct mtx md_lock;
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void *md_addr; /* address of raw MD */
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uint64_t md_size; /* size of raw MD */
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uint64_t md_buf_size; /* size of buffer allocated for MD */
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int md_refcount; /* reference count */
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mdesc_memops_t *md_memops; /* Memory operations for this MD */
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} mdesc_t;
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static mdesc_t *curr_mdesc = NULL;
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static struct mtx curr_mdesc_lock;
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static mdesc_memops_t *mdesc_memops;
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static void *mdesc_boot_buf_alloc(size_t size, size_t align);
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static void mdesc_boot_buf_free(void *buf, size_t align);
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static void *mdesc_boot_meta_alloc(size_t size);
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static void mdesc_boot_meta_free(void *buf, size_t size);
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static void *mdesc_buf_alloc(size_t size, size_t align);
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static void mdesc_buf_free(void *buf, size_t align);
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static void *mdesc_meta_alloc(size_t size);
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static void mdesc_meta_free(void *buf, size_t size);
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static mdesc_memops_t mdesc_boot_memops = {
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mdesc_boot_buf_alloc,
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mdesc_boot_buf_free,
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mdesc_boot_meta_alloc,
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mdesc_boot_meta_free,
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};
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static mdesc_memops_t mdesc_generic_memops = {
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mdesc_buf_alloc,
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mdesc_buf_free,
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mdesc_meta_alloc,
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mdesc_meta_free,
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};
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static void *
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mdesc_boot_buf_alloc(size_t size, size_t align)
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{
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UNIMPLEMENTED;
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}
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static void
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mdesc_boot_buf_free(void *buf, size_t align)
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{
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UNIMPLEMENTED;
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}
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static void *
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mdesc_boot_meta_alloc(size_t size)
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{
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UNIMPLEMENTED;
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}
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static void
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mdesc_boot_meta_free(void *buf, size_t size)
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{
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UNIMPLEMENTED;
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}
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static void *
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mdesc_buf_alloc(size_t size, size_t align)
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{
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2006-12-24 07:47:10 +00:00
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return pmap_alloc_zeroed_contig_pages(size/PAGE_SIZE, align);
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2006-10-05 06:14:28 +00:00
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}
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static void
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mdesc_buf_free(void *buf, size_t align)
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{
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contigfree(buf, PAGE_SIZE /*fix me*/, M_MDPROP);
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}
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static void *
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mdesc_meta_alloc(size_t size)
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{
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2006-11-24 22:14:37 +00:00
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return malloc(size, M_MDPROP, M_NOWAIT);
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2006-10-05 06:14:28 +00:00
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}
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static void
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mdesc_meta_free(void *buf, size_t size)
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{
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free(buf, M_MDPROP);
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}
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void
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mdesc_init(void)
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{
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mtx_init(&curr_mdesc_lock, "current machine description lock", NULL, MTX_DEF);
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mdesc_memops = &mdesc_boot_memops;
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}
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static void
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mdesc_postvm_init(void *unused)
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{
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mdesc_memops = &mdesc_generic_memops;
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}
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static mdesc_t *
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mdesc_alloc(void)
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{
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mdesc_t *mdp;
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mdp = (mdesc_t *)(mdesc_memops->mm_meta_alloc)(sizeof(mdesc_t));
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if (mdp != NULL) {
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bzero(mdp, sizeof(*mdp));
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mdp->md_memops = mdesc_memops;
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mtx_init(&mdp->md_lock, "machine descriptor lock", NULL, MTX_DEF);
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}
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return (mdp);
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}
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int
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mdesc_update(void)
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{
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uint64_t rv;
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uint64_t mdesc_size, mdesc_buf_size = 0;
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void *buf = NULL;
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#ifdef notyet
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uint64_t gen;
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#endif
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do {
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if (buf != NULL)
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(mdesc_memops->mm_buf_free)(buf, mdesc_buf_size);
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mdesc_size = 0LL;
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2006-12-12 02:50:12 +00:00
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do {
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rv = hv_mach_desc((uint64_t)0, &mdesc_size);
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if (rv != H_EOK && rv != H_EINVAL)
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printf("retrying to fetch mdesc size\n");
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} while (rv != H_EOK && rv != H_EINVAL);
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2006-10-05 06:14:28 +00:00
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mdesc_size = mdesc_buf_size = round_page(mdesc_size);
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if ((buf = (*mdesc_memops->mm_buf_alloc)(mdesc_buf_size, PAGE_SIZE)) == NULL) {
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2006-12-12 02:50:12 +00:00
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rv = ENOMEM;
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2006-10-05 06:14:28 +00:00
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goto done;
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}
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rv = hv_mach_desc(vtophys(buf), &mdesc_size);
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if (rv != H_EOK && rv != H_EINVAL) {
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goto done;
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}
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} while (mdesc_size > mdesc_buf_size);
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KASSERT(rv == H_EOK, ("unexpected return from hv_mach_desc"));
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/* XXX we ignore the generation count... not all versions may
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* support it
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*/
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if (curr_mdesc->md_refcount == 0) {
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(*mdesc_memops->mm_buf_free) (curr_mdesc->md_addr, curr_mdesc->md_size);
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} else {
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panic("out of date machine description list not implemented");
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}
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mtx_lock(&curr_mdesc_lock);
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#ifdef notyet
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curr_mdesc->md_gen = gen;
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#endif
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curr_mdesc->md_addr = buf;
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curr_mdesc->md_size = mdesc_size;
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curr_mdesc->md_buf_size = mdesc_buf_size;
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mtx_unlock(&curr_mdesc_lock);
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2006-12-12 02:50:12 +00:00
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return (0);
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2006-10-05 06:14:28 +00:00
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done:
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if (buf != NULL)
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(*mdesc_memops->mm_buf_free)(buf, mdesc_buf_size);
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return (rv);
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}
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md_t *
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md_get(void)
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{
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md_t *mdp;
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2006-12-12 02:50:12 +00:00
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int rc;
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2006-10-05 06:14:28 +00:00
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/*
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* XXX This should actually happen in init
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*/
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if (curr_mdesc == NULL) {
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if ((curr_mdesc = mdesc_alloc()) == NULL)
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panic("machine description allocation failed");
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2006-12-12 02:50:12 +00:00
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if ((rc = mdesc_update()) != 0)
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panic("machine description update failed: %d", rc);
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2006-10-05 06:14:28 +00:00
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}
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mtx_lock(&curr_mdesc_lock);
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curr_mdesc->md_refcount++;
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mdp = md_init_intern(curr_mdesc->md_addr,
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curr_mdesc->md_memops->mm_meta_alloc,
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curr_mdesc->md_memops->mm_meta_free);
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mtx_unlock(&curr_mdesc_lock);
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return (mdp);
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}
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void
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md_put(md_t *ptr)
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{
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md_impl_t *mdp;
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mdp = (md_impl_t *)ptr;
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#ifdef notyet
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mtx_lock(&curr_mdesc_lock)
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/* XXX check against generation */
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if (curr_mdesc->md_gen == mdp->md_gen) {
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curr_mdesc->md_refcount--;
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mtx_unlock(&curr_mdesc_lock)
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goto done;
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}
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mtx_unlock(&curr_mdesc_lock);
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/*
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* MD is on the out of date list
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*/
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done:
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#endif
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/*
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* We don't keep an out of date list currently
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*/
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mtx_lock(&curr_mdesc_lock);
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curr_mdesc->md_refcount--;
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mtx_unlock(&curr_mdesc_lock);
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mdp->freep(mdp, sizeof(md_impl_t));
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}
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