sun4v/generic-mem/gmem_page.c

	gmem_page.c revision aab83bb83be7342f6cfccaed8d5fe0b2f404855d
/*
 * 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 (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
 */


/*
 * Support routines for managing per-page state.
 */

#include <gmem_page.h>
#include <gmem_mem.h>
#include <gmem_dimm.h>
#include <gmem.h>

#include <errno.h>
#include <strings.h>
#include <fm/fmd_api.h>
#include <sys/fm/protocol.h>

static void
page_write(fmd_hdl_t *hdl, gmem_page_t *page)
{
    fmd_buf_write(hdl, NULL, page->page_bufname, page,
        sizeof (gmem_page_pers_t));
}

static void
gmem_page_free(fmd_hdl_t *hdl, gmem_page_t *page, int destroy)
{
    gmem_case_t *cc = &page->page_case;

    if (cc->cc_cp != NULL)
        gmem_case_fini(hdl, cc->cc_cp, destroy);

    if (cc->cc_serdnm != NULL) {
        if (fmd_serd_exists(hdl, cc->cc_serdnm) && destroy)
            fmd_serd_destroy(hdl, cc->cc_serdnm);
        fmd_hdl_strfree(hdl, cc->cc_serdnm);
    }

    if (destroy)
        fmd_buf_destroy(hdl, NULL, page->page_bufname);

    gmem_fmri_fini(hdl, &page->page_asru, destroy);

    gmem_list_delete(&gmem.gm_pages, page);
    fmd_hdl_free(hdl, page, sizeof (gmem_page_t));
}

void
gmem_page_destroy(fmd_hdl_t *hdl, gmem_page_t *page)
{
    fmd_hdl_debug(hdl, "destroying the page\n");
    gmem_page_free(hdl, page, FMD_B_TRUE);
}

static gmem_page_t *
page_lookup_by_physaddr(uint64_t pa)
{
    gmem_page_t *page;

    for (page = gmem_list_next(&gmem.gm_pages); page != NULL;
        page = gmem_list_next(page)) {
        if (page->page_physbase == pa)
            return (page);
    }

    return (NULL);
}

gmem_page_t *
gmem_page_create(fmd_hdl_t *hdl, nvlist_t *modasru, uint64_t pa,
    uint64_t offset)
{
    gmem_page_t *page;
    nvlist_t *asru, *hsp;

    pa = pa & gmem.gm_pagemask;

    fmd_hdl_debug(hdl, "page_lookup: creating new page for %llx\n",
        (u_longlong_t)pa);
    GMEM_STAT_BUMP(page_creat);

    page = fmd_hdl_zalloc(hdl, sizeof (gmem_page_t), FMD_SLEEP);
    page->page_nodetype = GMEM_NT_PAGE;
    page->page_version = CMD_PAGE_VERSION;
    page->page_physbase = pa;
    page->page_offset = offset;

    gmem_bufname(page->page_bufname, sizeof (page->page_bufname),
        "page_%llx", (u_longlong_t)pa);

    if (nvlist_dup(modasru, &asru, 0) != 0) {
        fmd_hdl_debug(hdl, "Page create nvlist dup failed");
        return (NULL);
    }

    if (nvlist_alloc(&hsp, NV_UNIQUE_NAME, 0) != 0) {
        fmd_hdl_debug(hdl, "Page create nvlist alloc failed");
        nvlist_free(asru);
        return (NULL);
    }

    if (nvlist_add_uint64(hsp, FM_FMRI_MEM_PHYSADDR,
        page->page_physbase) != 0 ||
        nvlist_add_uint64(hsp, FM_FMRI_HC_SPECIFIC_OFFSET,
        page->page_offset) != 0 ||
        nvlist_add_nvlist(asru, FM_FMRI_HC_SPECIFIC, hsp) != 0) {
        fmd_hdl_debug(hdl, "Page create failed to build page fmri");
        nvlist_free(asru);
        nvlist_free(hsp);
        return (NULL);
    }

    gmem_fmri_init(hdl, &page->page_asru, asru, "page_asru_%llx",
        (u_longlong_t)pa);

    nvlist_free(asru);
    nvlist_free(hsp);

    gmem_list_append(&gmem.gm_pages, page);
    page_write(hdl, page);

    return (page);
}

gmem_page_t *
gmem_page_lookup(uint64_t pa)
{
    pa = pa & gmem.gm_pagemask;

    return (page_lookup_by_physaddr(pa));
}

static gmem_page_t *
page_wrapv0(fmd_hdl_t *hdl, gmem_page_pers_t *pers, size_t psz)
{
    gmem_page_t *page;

    if (psz != sizeof (gmem_page_pers_t)) {
        fmd_hdl_abort(hdl, "size of state doesn't match size of "
            "version 0 state (%u bytes).\n", sizeof (gmem_page_pers_t));
    }

    page = fmd_hdl_zalloc(hdl, sizeof (gmem_page_t), FMD_SLEEP);
    bcopy(pers, page, sizeof (gmem_page_pers_t));
    fmd_hdl_free(hdl, pers, psz);
    return (page);
}

void *
gmem_page_restore(fmd_hdl_t *hdl, fmd_case_t *cp, gmem_case_ptr_t *ptr)
{
    gmem_page_t *page;

    for (page = gmem_list_next(&gmem.gm_pages); page != NULL;
        page = gmem_list_next(page)) {
        if (strcmp(page->page_bufname, ptr->ptr_name) == 0)
            break;
    }

    if (page == NULL) {
        size_t pagesz;

        fmd_hdl_debug(hdl, "restoring page from %s\n", ptr->ptr_name);

        if ((pagesz = fmd_buf_size(hdl, NULL, ptr->ptr_name)) == 0) {
            if (fmd_case_solved(hdl, cp) ||
                fmd_case_closed(hdl, cp)) {
                fmd_hdl_debug(hdl, "page %s from case %s not "
                    "found. Case is already solved or closed\n",
                    ptr->ptr_name, fmd_case_uuid(hdl, cp));
                return (NULL);
            } else {
                fmd_hdl_abort(hdl, "page referenced by case %s "
                    "does not exist in saved state\n",
                    fmd_case_uuid(hdl, cp));
            }
        } else if (pagesz > CMD_PAGE_MAXSIZE ||
            pagesz < CMD_PAGE_MINSIZE) {
            fmd_hdl_abort(hdl, "page buffer referenced by case %s "
                "is out of bounds (is %u bytes, max %u, min %u)\n",
                fmd_case_uuid(hdl, cp), pagesz,
                CMD_PAGE_MAXSIZE, CMD_PAGE_MINSIZE);
        }

        if ((page = gmem_buf_read(hdl, NULL, ptr->ptr_name,
            pagesz)) == NULL) {
            fmd_hdl_abort(hdl, "failed to read page buf %s",
                ptr->ptr_name);
        }

        fmd_hdl_debug(hdl, "found %d in version field\n",
            page->page_version);

        switch (page->page_version) {
        case CMD_PAGE_VERSION_0:
            page = page_wrapv0(hdl, (gmem_page_pers_t *)page,
                pagesz);
            break;
        default:
            fmd_hdl_abort(hdl, "unknown version (found %d) "
                "for page state referenced by case %s.\n",
                page->page_version, fmd_case_uuid(hdl, cp));
            break;
        }

        gmem_fmri_restore(hdl, &page->page_asru);

        gmem_list_append(&gmem.gm_pages, page);
    }

    switch (ptr->ptr_subtype) {
    case GMEM_PTR_PAGE_CASE:
        gmem_case_restore(hdl, &page->page_case, cp,
            gmem_page_serdnm_create(hdl, "page", page->page_physbase));
        break;
    default:
        fmd_hdl_abort(hdl, "invalid %s subtype %d\n",
            ptr->ptr_name, ptr->ptr_subtype);
    }

    return (page);
}

/*ARGSUSED*/
int
gmem_page_unusable(fmd_hdl_t *hdl, gmem_page_t *page)
{
    nvlist_t *asru = NULL;
    char *sn;

    if (nvlist_lookup_string(page->page_asru_nvl,
        FM_FMRI_HC_SERIAL_ID, &sn) != 0)
        return (1);

    /*
     * get asru in mem scheme from topology
     */
    asru = gmem_find_dimm_asru(hdl, sn);
    if (asru == NULL)
        return (1);

    (void) nvlist_add_string_array(asru, FM_FMRI_MEM_SERIAL_ID, &sn, 1);
    (void) nvlist_add_uint64(asru, FM_FMRI_MEM_PHYSADDR,
        page->page_physbase);
    (void) nvlist_add_uint64(asru, FM_FMRI_MEM_OFFSET, page->page_offset);

    if (fmd_nvl_fmri_unusable(hdl, asru)) {
        nvlist_free(asru);
        return (1);
    }

    nvlist_free(asru);

    return (0);
}


/*ARGSUSED*/
void
gmem_page_validate(fmd_hdl_t *hdl)
{
    gmem_page_t *page, *next;

    for (page = gmem_list_next(&gmem.gm_pages); page != NULL; page = next) {
        next = gmem_list_next(page);

        if (gmem_page_unusable(hdl, page))
            gmem_page_destroy(hdl, page);
    }
}

void
gmem_page_dirty(fmd_hdl_t *hdl, gmem_page_t *page)
{
    if (fmd_buf_size(hdl, NULL, page->page_bufname) !=
        sizeof (gmem_page_pers_t))
        fmd_buf_destroy(hdl, NULL, page->page_bufname);

    /* No need to rewrite the FMRIs in the page - they don't change */
    fmd_buf_write(hdl, NULL, page->page_bufname, &page->page_pers,
        sizeof (gmem_page_pers_t));
}

void
gmem_page_fini(fmd_hdl_t *hdl)
{
    gmem_page_t *page;

    while ((page = gmem_list_next(&gmem.gm_pages)) != NULL)
        gmem_page_free(hdl, page, FMD_B_FALSE);
}


int
gmem_page_fault(fmd_hdl_t *hdl, nvlist_t *fru, nvlist_t *rsc,
    fmd_event_t *ep, uint64_t afar, uint64_t offset)
{
    gmem_page_t *page = NULL;
    const char *uuid;
    nvlist_t *flt, *hsp;

    page = gmem_page_lookup(afar);
    if (page != NULL) {
        if (page->page_flags & GMEM_F_FAULTING ||
            gmem_page_unusable(hdl, page)) {
            nvlist_free(rsc);
            page->page_flags |= GMEM_F_FAULTING;
            return (0);
        }
    } else {
        page = gmem_page_create(hdl, fru, afar, offset);
    }

    page->page_flags |= GMEM_F_FAULTING;
    if (page->page_case.cc_cp == NULL)
        page->page_case.cc_cp = gmem_case_create(hdl,
            &page->page_header, GMEM_PTR_PAGE_CASE, &uuid);

    if (nvlist_lookup_nvlist(page->page_asru_nvl, FM_FMRI_HC_SPECIFIC,
        &hsp) == 0)
        (void) nvlist_add_nvlist(rsc, FM_FMRI_HC_SPECIFIC, hsp);

    flt = fmd_nvl_create_fault(hdl, GMEM_FAULT_PAGE, 100, NULL, fru, rsc);
    nvlist_free(rsc);

    if (nvlist_add_boolean_value(flt, FM_SUSPECT_MESSAGE, B_FALSE) != 0)
        fmd_hdl_abort(hdl, "failed to add no-message member to fault");

    fmd_case_add_ereport(hdl, page->page_case.cc_cp, ep);
    fmd_case_add_suspect(hdl, page->page_case.cc_cp, flt);
    fmd_case_solve(hdl, page->page_case.cc_cp);
    return (1);
}

void
gmem_page_close(fmd_hdl_t *hdl, void *arg)
{
    gmem_page_destroy(hdl, arg);
}