b9ae3bd255
arch/ia64/sn/kernel/xpc_partition.c:578: warning: long unsigned int format, different type arg (arg 3) arch/ia64/sn/kernel/xpnet.c:349: warning: int format, different type arg (arg 7) arch/ia64/sn/kernel/xpnet.c:349: warning: int format, different type arg (arg 8) Signed-off-by: Tony Luck <tony.luck@intel.com>
1240 lines
31 KiB
C
1240 lines
31 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (c) 2004-2006 Silicon Graphics, Inc. All Rights Reserved.
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*/
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/*
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* Cross Partition Communication (XPC) partition support.
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*
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* This is the part of XPC that detects the presence/absence of
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* other partitions. It provides a heartbeat and monitors the
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* heartbeats of other partitions.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/sysctl.h>
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#include <linux/cache.h>
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#include <linux/mmzone.h>
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#include <linux/nodemask.h>
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#include <asm/uncached.h>
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#include <asm/sn/bte.h>
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#include <asm/sn/intr.h>
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#include <asm/sn/sn_sal.h>
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#include <asm/sn/nodepda.h>
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#include <asm/sn/addrs.h>
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#include <asm/sn/xpc.h>
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/* XPC is exiting flag */
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int xpc_exiting;
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/* SH_IPI_ACCESS shub register value on startup */
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static u64 xpc_sh1_IPI_access;
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static u64 xpc_sh2_IPI_access0;
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static u64 xpc_sh2_IPI_access1;
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static u64 xpc_sh2_IPI_access2;
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static u64 xpc_sh2_IPI_access3;
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/* original protection values for each node */
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u64 xpc_prot_vec[MAX_NUMNODES];
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/* this partition's reserved page pointers */
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struct xpc_rsvd_page *xpc_rsvd_page;
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static u64 *xpc_part_nasids;
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static u64 *xpc_mach_nasids;
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struct xpc_vars *xpc_vars;
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struct xpc_vars_part *xpc_vars_part;
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static int xp_nasid_mask_bytes; /* actual size in bytes of nasid mask */
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static int xp_nasid_mask_words; /* actual size in words of nasid mask */
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/*
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* For performance reasons, each entry of xpc_partitions[] is cacheline
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* aligned. And xpc_partitions[] is padded with an additional entry at the
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* end so that the last legitimate entry doesn't share its cacheline with
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* another variable.
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*/
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struct xpc_partition xpc_partitions[XP_MAX_PARTITIONS + 1];
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/*
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* Generic buffer used to store a local copy of portions of a remote
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* partition's reserved page (either its header and part_nasids mask,
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* or its vars).
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*/
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char *xpc_remote_copy_buffer;
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void *xpc_remote_copy_buffer_base;
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/*
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* Guarantee that the kmalloc'd memory is cacheline aligned.
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*/
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void *
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xpc_kmalloc_cacheline_aligned(size_t size, gfp_t flags, void **base)
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{
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/* see if kmalloc will give us cachline aligned memory by default */
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*base = kmalloc(size, flags);
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if (*base == NULL) {
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return NULL;
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}
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if ((u64) *base == L1_CACHE_ALIGN((u64) *base)) {
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return *base;
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}
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kfree(*base);
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/* nope, we'll have to do it ourselves */
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*base = kmalloc(size + L1_CACHE_BYTES, flags);
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if (*base == NULL) {
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return NULL;
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}
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return (void *) L1_CACHE_ALIGN((u64) *base);
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}
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/*
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* Given a nasid, get the physical address of the partition's reserved page
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* for that nasid. This function returns 0 on any error.
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*/
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static u64
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xpc_get_rsvd_page_pa(int nasid)
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{
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bte_result_t bte_res;
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s64 status;
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u64 cookie = 0;
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u64 rp_pa = nasid; /* seed with nasid */
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u64 len = 0;
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u64 buf = buf;
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u64 buf_len = 0;
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void *buf_base = NULL;
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while (1) {
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status = sn_partition_reserved_page_pa(buf, &cookie, &rp_pa,
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&len);
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dev_dbg(xpc_part, "SAL returned with status=%li, cookie="
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"0x%016lx, address=0x%016lx, len=0x%016lx\n",
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status, cookie, rp_pa, len);
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if (status != SALRET_MORE_PASSES) {
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break;
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}
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if (L1_CACHE_ALIGN(len) > buf_len) {
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kfree(buf_base);
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buf_len = L1_CACHE_ALIGN(len);
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buf = (u64) xpc_kmalloc_cacheline_aligned(buf_len,
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GFP_KERNEL, &buf_base);
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if (buf_base == NULL) {
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dev_err(xpc_part, "unable to kmalloc "
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"len=0x%016lx\n", buf_len);
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status = SALRET_ERROR;
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break;
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}
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}
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bte_res = xp_bte_copy(rp_pa, buf, buf_len,
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(BTE_NOTIFY | BTE_WACQUIRE), NULL);
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if (bte_res != BTE_SUCCESS) {
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dev_dbg(xpc_part, "xp_bte_copy failed %i\n", bte_res);
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status = SALRET_ERROR;
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break;
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}
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}
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kfree(buf_base);
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if (status != SALRET_OK) {
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rp_pa = 0;
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}
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dev_dbg(xpc_part, "reserved page at phys address 0x%016lx\n", rp_pa);
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return rp_pa;
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}
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/*
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* Fill the partition reserved page with the information needed by
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* other partitions to discover we are alive and establish initial
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* communications.
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*/
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struct xpc_rsvd_page *
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xpc_rsvd_page_init(void)
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{
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struct xpc_rsvd_page *rp;
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AMO_t *amos_page;
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u64 rp_pa, nasid_array = 0;
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int i, ret;
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/* get the local reserved page's address */
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preempt_disable();
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rp_pa = xpc_get_rsvd_page_pa(cpuid_to_nasid(smp_processor_id()));
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preempt_enable();
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if (rp_pa == 0) {
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dev_err(xpc_part, "SAL failed to locate the reserved page\n");
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return NULL;
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}
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rp = (struct xpc_rsvd_page *) __va(rp_pa);
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if (rp->partid != sn_partition_id) {
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dev_err(xpc_part, "the reserved page's partid of %d should be "
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"%d\n", rp->partid, sn_partition_id);
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return NULL;
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}
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rp->version = XPC_RP_VERSION;
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/* establish the actual sizes of the nasid masks */
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if (rp->SAL_version == 1) {
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/* SAL_version 1 didn't set the nasids_size field */
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rp->nasids_size = 128;
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}
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xp_nasid_mask_bytes = rp->nasids_size;
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xp_nasid_mask_words = xp_nasid_mask_bytes / 8;
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/* setup the pointers to the various items in the reserved page */
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xpc_part_nasids = XPC_RP_PART_NASIDS(rp);
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xpc_mach_nasids = XPC_RP_MACH_NASIDS(rp);
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xpc_vars = XPC_RP_VARS(rp);
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xpc_vars_part = XPC_RP_VARS_PART(rp);
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/*
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* Before clearing xpc_vars, see if a page of AMOs had been previously
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* allocated. If not we'll need to allocate one and set permissions
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* so that cross-partition AMOs are allowed.
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*
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* The allocated AMO page needs MCA reporting to remain disabled after
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* XPC has unloaded. To make this work, we keep a copy of the pointer
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* to this page (i.e., amos_page) in the struct xpc_vars structure,
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* which is pointed to by the reserved page, and re-use that saved copy
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* on subsequent loads of XPC. This AMO page is never freed, and its
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* memory protections are never restricted.
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*/
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if ((amos_page = xpc_vars->amos_page) == NULL) {
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amos_page = (AMO_t *) TO_AMO(uncached_alloc_page(0));
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if (amos_page == NULL) {
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dev_err(xpc_part, "can't allocate page of AMOs\n");
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return NULL;
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}
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/*
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* Open up AMO-R/W to cpu. This is done for Shub 1.1 systems
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* when xpc_allow_IPI_ops() is called via xpc_hb_init().
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*/
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if (!enable_shub_wars_1_1()) {
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ret = sn_change_memprotect(ia64_tpa((u64) amos_page),
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PAGE_SIZE, SN_MEMPROT_ACCESS_CLASS_1,
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&nasid_array);
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if (ret != 0) {
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dev_err(xpc_part, "can't change memory "
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"protections\n");
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uncached_free_page(__IA64_UNCACHED_OFFSET |
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TO_PHYS((u64) amos_page));
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return NULL;
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}
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}
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} else if (!IS_AMO_ADDRESS((u64) amos_page)) {
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/*
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* EFI's XPBOOT can also set amos_page in the reserved page,
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* but it happens to leave it as an uncached physical address
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* and we need it to be an uncached virtual, so we'll have to
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* convert it.
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*/
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if (!IS_AMO_PHYS_ADDRESS((u64) amos_page)) {
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dev_err(xpc_part, "previously used amos_page address "
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"is bad = 0x%p\n", (void *) amos_page);
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return NULL;
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}
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amos_page = (AMO_t *) TO_AMO((u64) amos_page);
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}
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/* clear xpc_vars */
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memset(xpc_vars, 0, sizeof(struct xpc_vars));
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xpc_vars->version = XPC_V_VERSION;
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xpc_vars->act_nasid = cpuid_to_nasid(0);
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xpc_vars->act_phys_cpuid = cpu_physical_id(0);
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xpc_vars->vars_part_pa = __pa(xpc_vars_part);
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xpc_vars->amos_page_pa = ia64_tpa((u64) amos_page);
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xpc_vars->amos_page = amos_page; /* save for next load of XPC */
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/* clear xpc_vars_part */
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memset((u64 *) xpc_vars_part, 0, sizeof(struct xpc_vars_part) *
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XP_MAX_PARTITIONS);
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/* initialize the activate IRQ related AMO variables */
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for (i = 0; i < xp_nasid_mask_words; i++) {
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(void) xpc_IPI_init(XPC_ACTIVATE_IRQ_AMOS + i);
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}
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/* initialize the engaged remote partitions related AMO variables */
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(void) xpc_IPI_init(XPC_ENGAGED_PARTITIONS_AMO);
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(void) xpc_IPI_init(XPC_DISENGAGE_REQUEST_AMO);
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/* timestamp of when reserved page was setup by XPC */
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rp->stamp = CURRENT_TIME;
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/*
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* This signifies to the remote partition that our reserved
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* page is initialized.
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*/
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rp->vars_pa = __pa(xpc_vars);
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return rp;
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}
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/*
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* Change protections to allow IPI operations (and AMO operations on
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* Shub 1.1 systems).
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*/
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void
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xpc_allow_IPI_ops(void)
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{
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int node;
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int nasid;
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// >>> Change SH_IPI_ACCESS code to use SAL call once it is available.
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if (is_shub2()) {
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xpc_sh2_IPI_access0 =
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(u64) HUB_L((u64 *) LOCAL_MMR_ADDR(SH2_IPI_ACCESS0));
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xpc_sh2_IPI_access1 =
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(u64) HUB_L((u64 *) LOCAL_MMR_ADDR(SH2_IPI_ACCESS1));
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xpc_sh2_IPI_access2 =
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(u64) HUB_L((u64 *) LOCAL_MMR_ADDR(SH2_IPI_ACCESS2));
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xpc_sh2_IPI_access3 =
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(u64) HUB_L((u64 *) LOCAL_MMR_ADDR(SH2_IPI_ACCESS3));
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for_each_online_node(node) {
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nasid = cnodeid_to_nasid(node);
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HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS0),
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-1UL);
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HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS1),
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-1UL);
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HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS2),
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-1UL);
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HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS3),
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-1UL);
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}
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} else {
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xpc_sh1_IPI_access =
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(u64) HUB_L((u64 *) LOCAL_MMR_ADDR(SH1_IPI_ACCESS));
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for_each_online_node(node) {
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nasid = cnodeid_to_nasid(node);
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HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH1_IPI_ACCESS),
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-1UL);
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/*
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* Since the BIST collides with memory operations on
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* SHUB 1.1 sn_change_memprotect() cannot be used.
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*/
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if (enable_shub_wars_1_1()) {
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/* open up everything */
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xpc_prot_vec[node] = (u64) HUB_L((u64 *)
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GLOBAL_MMR_ADDR(nasid,
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SH1_MD_DQLP_MMR_DIR_PRIVEC0));
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HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid,
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SH1_MD_DQLP_MMR_DIR_PRIVEC0),
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-1UL);
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HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid,
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SH1_MD_DQRP_MMR_DIR_PRIVEC0),
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-1UL);
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}
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}
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}
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}
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/*
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* Restrict protections to disallow IPI operations (and AMO operations on
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* Shub 1.1 systems).
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*/
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void
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xpc_restrict_IPI_ops(void)
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{
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int node;
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int nasid;
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// >>> Change SH_IPI_ACCESS code to use SAL call once it is available.
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if (is_shub2()) {
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for_each_online_node(node) {
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nasid = cnodeid_to_nasid(node);
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HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS0),
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xpc_sh2_IPI_access0);
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HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS1),
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xpc_sh2_IPI_access1);
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HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS2),
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xpc_sh2_IPI_access2);
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HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS3),
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xpc_sh2_IPI_access3);
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}
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} else {
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for_each_online_node(node) {
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nasid = cnodeid_to_nasid(node);
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HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH1_IPI_ACCESS),
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xpc_sh1_IPI_access);
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if (enable_shub_wars_1_1()) {
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HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid,
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SH1_MD_DQLP_MMR_DIR_PRIVEC0),
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xpc_prot_vec[node]);
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HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid,
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SH1_MD_DQRP_MMR_DIR_PRIVEC0),
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xpc_prot_vec[node]);
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}
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}
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}
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}
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/*
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* At periodic intervals, scan through all active partitions and ensure
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* their heartbeat is still active. If not, the partition is deactivated.
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*/
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void
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xpc_check_remote_hb(void)
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{
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struct xpc_vars *remote_vars;
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struct xpc_partition *part;
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partid_t partid;
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bte_result_t bres;
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|
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remote_vars = (struct xpc_vars *) xpc_remote_copy_buffer;
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|
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for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
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|
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if (xpc_exiting) {
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break;
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}
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if (partid == sn_partition_id) {
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continue;
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}
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part = &xpc_partitions[partid];
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if (part->act_state == XPC_P_INACTIVE ||
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part->act_state == XPC_P_DEACTIVATING) {
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continue;
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}
|
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|
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/* pull the remote_hb cache line */
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bres = xp_bte_copy(part->remote_vars_pa,
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(u64) remote_vars,
|
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XPC_RP_VARS_SIZE,
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(BTE_NOTIFY | BTE_WACQUIRE), NULL);
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if (bres != BTE_SUCCESS) {
|
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XPC_DEACTIVATE_PARTITION(part,
|
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xpc_map_bte_errors(bres));
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continue;
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}
|
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dev_dbg(xpc_part, "partid = %d, heartbeat = %ld, last_heartbeat"
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" = %ld, heartbeat_offline = %ld, HB_mask = 0x%lx\n",
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partid, remote_vars->heartbeat, part->last_heartbeat,
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remote_vars->heartbeat_offline,
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remote_vars->heartbeating_to_mask);
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if (((remote_vars->heartbeat == part->last_heartbeat) &&
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(remote_vars->heartbeat_offline == 0)) ||
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!xpc_hb_allowed(sn_partition_id, remote_vars)) {
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XPC_DEACTIVATE_PARTITION(part, xpcNoHeartbeat);
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continue;
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}
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part->last_heartbeat = remote_vars->heartbeat;
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}
|
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}
|
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|
|
|
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/*
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* Get a copy of a portion of the remote partition's rsvd page.
|
|
*
|
|
* remote_rp points to a buffer that is cacheline aligned for BTE copies and
|
|
* is large enough to contain a copy of their reserved page header and
|
|
* part_nasids mask.
|
|
*/
|
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static enum xpc_retval
|
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xpc_get_remote_rp(int nasid, u64 *discovered_nasids,
|
|
struct xpc_rsvd_page *remote_rp, u64 *remote_rp_pa)
|
|
{
|
|
int bres, i;
|
|
|
|
|
|
/* get the reserved page's physical address */
|
|
|
|
*remote_rp_pa = xpc_get_rsvd_page_pa(nasid);
|
|
if (*remote_rp_pa == 0) {
|
|
return xpcNoRsvdPageAddr;
|
|
}
|
|
|
|
|
|
/* pull over the reserved page header and part_nasids mask */
|
|
bres = xp_bte_copy(*remote_rp_pa, (u64) remote_rp,
|
|
XPC_RP_HEADER_SIZE + xp_nasid_mask_bytes,
|
|
(BTE_NOTIFY | BTE_WACQUIRE), NULL);
|
|
if (bres != BTE_SUCCESS) {
|
|
return xpc_map_bte_errors(bres);
|
|
}
|
|
|
|
|
|
if (discovered_nasids != NULL) {
|
|
u64 *remote_part_nasids = XPC_RP_PART_NASIDS(remote_rp);
|
|
|
|
|
|
for (i = 0; i < xp_nasid_mask_words; i++) {
|
|
discovered_nasids[i] |= remote_part_nasids[i];
|
|
}
|
|
}
|
|
|
|
|
|
/* check that the partid is for another partition */
|
|
|
|
if (remote_rp->partid < 1 ||
|
|
remote_rp->partid > (XP_MAX_PARTITIONS - 1)) {
|
|
return xpcInvalidPartid;
|
|
}
|
|
|
|
if (remote_rp->partid == sn_partition_id) {
|
|
return xpcLocalPartid;
|
|
}
|
|
|
|
|
|
if (XPC_VERSION_MAJOR(remote_rp->version) !=
|
|
XPC_VERSION_MAJOR(XPC_RP_VERSION)) {
|
|
return xpcBadVersion;
|
|
}
|
|
|
|
return xpcSuccess;
|
|
}
|
|
|
|
|
|
/*
|
|
* Get a copy of the remote partition's XPC variables from the reserved page.
|
|
*
|
|
* remote_vars points to a buffer that is cacheline aligned for BTE copies and
|
|
* assumed to be of size XPC_RP_VARS_SIZE.
|
|
*/
|
|
static enum xpc_retval
|
|
xpc_get_remote_vars(u64 remote_vars_pa, struct xpc_vars *remote_vars)
|
|
{
|
|
int bres;
|
|
|
|
|
|
if (remote_vars_pa == 0) {
|
|
return xpcVarsNotSet;
|
|
}
|
|
|
|
/* pull over the cross partition variables */
|
|
bres = xp_bte_copy(remote_vars_pa, (u64) remote_vars, XPC_RP_VARS_SIZE,
|
|
(BTE_NOTIFY | BTE_WACQUIRE), NULL);
|
|
if (bres != BTE_SUCCESS) {
|
|
return xpc_map_bte_errors(bres);
|
|
}
|
|
|
|
if (XPC_VERSION_MAJOR(remote_vars->version) !=
|
|
XPC_VERSION_MAJOR(XPC_V_VERSION)) {
|
|
return xpcBadVersion;
|
|
}
|
|
|
|
return xpcSuccess;
|
|
}
|
|
|
|
|
|
/*
|
|
* Update the remote partition's info.
|
|
*/
|
|
static void
|
|
xpc_update_partition_info(struct xpc_partition *part, u8 remote_rp_version,
|
|
struct timespec *remote_rp_stamp, u64 remote_rp_pa,
|
|
u64 remote_vars_pa, struct xpc_vars *remote_vars)
|
|
{
|
|
part->remote_rp_version = remote_rp_version;
|
|
dev_dbg(xpc_part, " remote_rp_version = 0x%016x\n",
|
|
part->remote_rp_version);
|
|
|
|
part->remote_rp_stamp = *remote_rp_stamp;
|
|
dev_dbg(xpc_part, " remote_rp_stamp (tv_sec = 0x%lx tv_nsec = 0x%lx\n",
|
|
part->remote_rp_stamp.tv_sec, part->remote_rp_stamp.tv_nsec);
|
|
|
|
part->remote_rp_pa = remote_rp_pa;
|
|
dev_dbg(xpc_part, " remote_rp_pa = 0x%016lx\n", part->remote_rp_pa);
|
|
|
|
part->remote_vars_pa = remote_vars_pa;
|
|
dev_dbg(xpc_part, " remote_vars_pa = 0x%016lx\n",
|
|
part->remote_vars_pa);
|
|
|
|
part->last_heartbeat = remote_vars->heartbeat;
|
|
dev_dbg(xpc_part, " last_heartbeat = 0x%016lx\n",
|
|
part->last_heartbeat);
|
|
|
|
part->remote_vars_part_pa = remote_vars->vars_part_pa;
|
|
dev_dbg(xpc_part, " remote_vars_part_pa = 0x%016lx\n",
|
|
part->remote_vars_part_pa);
|
|
|
|
part->remote_act_nasid = remote_vars->act_nasid;
|
|
dev_dbg(xpc_part, " remote_act_nasid = 0x%x\n",
|
|
part->remote_act_nasid);
|
|
|
|
part->remote_act_phys_cpuid = remote_vars->act_phys_cpuid;
|
|
dev_dbg(xpc_part, " remote_act_phys_cpuid = 0x%x\n",
|
|
part->remote_act_phys_cpuid);
|
|
|
|
part->remote_amos_page_pa = remote_vars->amos_page_pa;
|
|
dev_dbg(xpc_part, " remote_amos_page_pa = 0x%lx\n",
|
|
part->remote_amos_page_pa);
|
|
|
|
part->remote_vars_version = remote_vars->version;
|
|
dev_dbg(xpc_part, " remote_vars_version = 0x%x\n",
|
|
part->remote_vars_version);
|
|
}
|
|
|
|
|
|
/*
|
|
* Prior code has determined the nasid which generated an IPI. Inspect
|
|
* that nasid to determine if its partition needs to be activated or
|
|
* deactivated.
|
|
*
|
|
* A partition is consider "awaiting activation" if our partition
|
|
* flags indicate it is not active and it has a heartbeat. A
|
|
* partition is considered "awaiting deactivation" if our partition
|
|
* flags indicate it is active but it has no heartbeat or it is not
|
|
* sending its heartbeat to us.
|
|
*
|
|
* To determine the heartbeat, the remote nasid must have a properly
|
|
* initialized reserved page.
|
|
*/
|
|
static void
|
|
xpc_identify_act_IRQ_req(int nasid)
|
|
{
|
|
struct xpc_rsvd_page *remote_rp;
|
|
struct xpc_vars *remote_vars;
|
|
u64 remote_rp_pa;
|
|
u64 remote_vars_pa;
|
|
int remote_rp_version;
|
|
int reactivate = 0;
|
|
int stamp_diff;
|
|
struct timespec remote_rp_stamp = { 0, 0 };
|
|
partid_t partid;
|
|
struct xpc_partition *part;
|
|
enum xpc_retval ret;
|
|
|
|
|
|
/* pull over the reserved page structure */
|
|
|
|
remote_rp = (struct xpc_rsvd_page *) xpc_remote_copy_buffer;
|
|
|
|
ret = xpc_get_remote_rp(nasid, NULL, remote_rp, &remote_rp_pa);
|
|
if (ret != xpcSuccess) {
|
|
dev_warn(xpc_part, "unable to get reserved page from nasid %d, "
|
|
"which sent interrupt, reason=%d\n", nasid, ret);
|
|
return;
|
|
}
|
|
|
|
remote_vars_pa = remote_rp->vars_pa;
|
|
remote_rp_version = remote_rp->version;
|
|
if (XPC_SUPPORTS_RP_STAMP(remote_rp_version)) {
|
|
remote_rp_stamp = remote_rp->stamp;
|
|
}
|
|
partid = remote_rp->partid;
|
|
part = &xpc_partitions[partid];
|
|
|
|
|
|
/* pull over the cross partition variables */
|
|
|
|
remote_vars = (struct xpc_vars *) xpc_remote_copy_buffer;
|
|
|
|
ret = xpc_get_remote_vars(remote_vars_pa, remote_vars);
|
|
if (ret != xpcSuccess) {
|
|
|
|
dev_warn(xpc_part, "unable to get XPC variables from nasid %d, "
|
|
"which sent interrupt, reason=%d\n", nasid, ret);
|
|
|
|
XPC_DEACTIVATE_PARTITION(part, ret);
|
|
return;
|
|
}
|
|
|
|
|
|
part->act_IRQ_rcvd++;
|
|
|
|
dev_dbg(xpc_part, "partid for nasid %d is %d; IRQs = %d; HB = "
|
|
"%ld:0x%lx\n", (int) nasid, (int) partid, part->act_IRQ_rcvd,
|
|
remote_vars->heartbeat, remote_vars->heartbeating_to_mask);
|
|
|
|
if (xpc_partition_disengaged(part) &&
|
|
part->act_state == XPC_P_INACTIVE) {
|
|
|
|
xpc_update_partition_info(part, remote_rp_version,
|
|
&remote_rp_stamp, remote_rp_pa,
|
|
remote_vars_pa, remote_vars);
|
|
|
|
if (XPC_SUPPORTS_DISENGAGE_REQUEST(part->remote_vars_version)) {
|
|
if (xpc_partition_disengage_requested(1UL << partid)) {
|
|
/*
|
|
* Other side is waiting on us to disengage,
|
|
* even though we already have.
|
|
*/
|
|
return;
|
|
}
|
|
} else {
|
|
/* other side doesn't support disengage requests */
|
|
xpc_clear_partition_disengage_request(1UL << partid);
|
|
}
|
|
|
|
xpc_activate_partition(part);
|
|
return;
|
|
}
|
|
|
|
DBUG_ON(part->remote_rp_version == 0);
|
|
DBUG_ON(part->remote_vars_version == 0);
|
|
|
|
if (!XPC_SUPPORTS_RP_STAMP(part->remote_rp_version)) {
|
|
DBUG_ON(XPC_SUPPORTS_DISENGAGE_REQUEST(part->
|
|
remote_vars_version));
|
|
|
|
if (!XPC_SUPPORTS_RP_STAMP(remote_rp_version)) {
|
|
DBUG_ON(XPC_SUPPORTS_DISENGAGE_REQUEST(remote_vars->
|
|
version));
|
|
/* see if the other side rebooted */
|
|
if (part->remote_amos_page_pa ==
|
|
remote_vars->amos_page_pa &&
|
|
xpc_hb_allowed(sn_partition_id,
|
|
remote_vars)) {
|
|
/* doesn't look that way, so ignore the IPI */
|
|
return;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Other side rebooted and previous XPC didn't support the
|
|
* disengage request, so we don't need to do anything special.
|
|
*/
|
|
|
|
xpc_update_partition_info(part, remote_rp_version,
|
|
&remote_rp_stamp, remote_rp_pa,
|
|
remote_vars_pa, remote_vars);
|
|
part->reactivate_nasid = nasid;
|
|
XPC_DEACTIVATE_PARTITION(part, xpcReactivating);
|
|
return;
|
|
}
|
|
|
|
DBUG_ON(!XPC_SUPPORTS_DISENGAGE_REQUEST(part->remote_vars_version));
|
|
|
|
if (!XPC_SUPPORTS_RP_STAMP(remote_rp_version)) {
|
|
DBUG_ON(!XPC_SUPPORTS_DISENGAGE_REQUEST(remote_vars->version));
|
|
|
|
/*
|
|
* Other side rebooted and previous XPC did support the
|
|
* disengage request, but the new one doesn't.
|
|
*/
|
|
|
|
xpc_clear_partition_engaged(1UL << partid);
|
|
xpc_clear_partition_disengage_request(1UL << partid);
|
|
|
|
xpc_update_partition_info(part, remote_rp_version,
|
|
&remote_rp_stamp, remote_rp_pa,
|
|
remote_vars_pa, remote_vars);
|
|
reactivate = 1;
|
|
|
|
} else {
|
|
DBUG_ON(!XPC_SUPPORTS_DISENGAGE_REQUEST(remote_vars->version));
|
|
|
|
stamp_diff = xpc_compare_stamps(&part->remote_rp_stamp,
|
|
&remote_rp_stamp);
|
|
if (stamp_diff != 0) {
|
|
DBUG_ON(stamp_diff >= 0);
|
|
|
|
/*
|
|
* Other side rebooted and the previous XPC did support
|
|
* the disengage request, as does the new one.
|
|
*/
|
|
|
|
DBUG_ON(xpc_partition_engaged(1UL << partid));
|
|
DBUG_ON(xpc_partition_disengage_requested(1UL <<
|
|
partid));
|
|
|
|
xpc_update_partition_info(part, remote_rp_version,
|
|
&remote_rp_stamp, remote_rp_pa,
|
|
remote_vars_pa, remote_vars);
|
|
reactivate = 1;
|
|
}
|
|
}
|
|
|
|
if (part->disengage_request_timeout > 0 &&
|
|
!xpc_partition_disengaged(part)) {
|
|
/* still waiting on other side to disengage from us */
|
|
return;
|
|
}
|
|
|
|
if (reactivate) {
|
|
part->reactivate_nasid = nasid;
|
|
XPC_DEACTIVATE_PARTITION(part, xpcReactivating);
|
|
|
|
} else if (XPC_SUPPORTS_DISENGAGE_REQUEST(part->remote_vars_version) &&
|
|
xpc_partition_disengage_requested(1UL << partid)) {
|
|
XPC_DEACTIVATE_PARTITION(part, xpcOtherGoingDown);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Loop through the activation AMO variables and process any bits
|
|
* which are set. Each bit indicates a nasid sending a partition
|
|
* activation or deactivation request.
|
|
*
|
|
* Return #of IRQs detected.
|
|
*/
|
|
int
|
|
xpc_identify_act_IRQ_sender(void)
|
|
{
|
|
int word, bit;
|
|
u64 nasid_mask;
|
|
u64 nasid; /* remote nasid */
|
|
int n_IRQs_detected = 0;
|
|
AMO_t *act_amos;
|
|
|
|
|
|
act_amos = xpc_vars->amos_page + XPC_ACTIVATE_IRQ_AMOS;
|
|
|
|
|
|
/* scan through act AMO variable looking for non-zero entries */
|
|
for (word = 0; word < xp_nasid_mask_words; word++) {
|
|
|
|
if (xpc_exiting) {
|
|
break;
|
|
}
|
|
|
|
nasid_mask = xpc_IPI_receive(&act_amos[word]);
|
|
if (nasid_mask == 0) {
|
|
/* no IRQs from nasids in this variable */
|
|
continue;
|
|
}
|
|
|
|
dev_dbg(xpc_part, "AMO[%d] gave back 0x%lx\n", word,
|
|
nasid_mask);
|
|
|
|
|
|
/*
|
|
* If this nasid has been added to the machine since
|
|
* our partition was reset, this will retain the
|
|
* remote nasid in our reserved pages machine mask.
|
|
* This is used in the event of module reload.
|
|
*/
|
|
xpc_mach_nasids[word] |= nasid_mask;
|
|
|
|
|
|
/* locate the nasid(s) which sent interrupts */
|
|
|
|
for (bit = 0; bit < (8 * sizeof(u64)); bit++) {
|
|
if (nasid_mask & (1UL << bit)) {
|
|
n_IRQs_detected++;
|
|
nasid = XPC_NASID_FROM_W_B(word, bit);
|
|
dev_dbg(xpc_part, "interrupt from nasid %ld\n",
|
|
nasid);
|
|
xpc_identify_act_IRQ_req(nasid);
|
|
}
|
|
}
|
|
}
|
|
return n_IRQs_detected;
|
|
}
|
|
|
|
|
|
/*
|
|
* See if the other side has responded to a partition disengage request
|
|
* from us.
|
|
*/
|
|
int
|
|
xpc_partition_disengaged(struct xpc_partition *part)
|
|
{
|
|
partid_t partid = XPC_PARTID(part);
|
|
int disengaged;
|
|
|
|
|
|
disengaged = (xpc_partition_engaged(1UL << partid) == 0);
|
|
if (part->disengage_request_timeout) {
|
|
if (!disengaged) {
|
|
if (jiffies < part->disengage_request_timeout) {
|
|
/* timelimit hasn't been reached yet */
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Other side hasn't responded to our disengage
|
|
* request in a timely fashion, so assume it's dead.
|
|
*/
|
|
|
|
dev_info(xpc_part, "disengage from remote partition %d "
|
|
"timed out\n", partid);
|
|
xpc_disengage_request_timedout = 1;
|
|
xpc_clear_partition_engaged(1UL << partid);
|
|
disengaged = 1;
|
|
}
|
|
part->disengage_request_timeout = 0;
|
|
|
|
/* cancel the timer function, provided it's not us */
|
|
if (!in_interrupt()) {
|
|
del_singleshot_timer_sync(&part->
|
|
disengage_request_timer);
|
|
}
|
|
|
|
DBUG_ON(part->act_state != XPC_P_DEACTIVATING &&
|
|
part->act_state != XPC_P_INACTIVE);
|
|
if (part->act_state != XPC_P_INACTIVE) {
|
|
xpc_wakeup_channel_mgr(part);
|
|
}
|
|
|
|
if (XPC_SUPPORTS_DISENGAGE_REQUEST(part->remote_vars_version)) {
|
|
xpc_cancel_partition_disengage_request(part);
|
|
}
|
|
}
|
|
return disengaged;
|
|
}
|
|
|
|
|
|
/*
|
|
* Mark specified partition as active.
|
|
*/
|
|
enum xpc_retval
|
|
xpc_mark_partition_active(struct xpc_partition *part)
|
|
{
|
|
unsigned long irq_flags;
|
|
enum xpc_retval ret;
|
|
|
|
|
|
dev_dbg(xpc_part, "setting partition %d to ACTIVE\n", XPC_PARTID(part));
|
|
|
|
spin_lock_irqsave(&part->act_lock, irq_flags);
|
|
if (part->act_state == XPC_P_ACTIVATING) {
|
|
part->act_state = XPC_P_ACTIVE;
|
|
ret = xpcSuccess;
|
|
} else {
|
|
DBUG_ON(part->reason == xpcSuccess);
|
|
ret = part->reason;
|
|
}
|
|
spin_unlock_irqrestore(&part->act_lock, irq_flags);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* Notify XPC that the partition is down.
|
|
*/
|
|
void
|
|
xpc_deactivate_partition(const int line, struct xpc_partition *part,
|
|
enum xpc_retval reason)
|
|
{
|
|
unsigned long irq_flags;
|
|
|
|
|
|
spin_lock_irqsave(&part->act_lock, irq_flags);
|
|
|
|
if (part->act_state == XPC_P_INACTIVE) {
|
|
XPC_SET_REASON(part, reason, line);
|
|
spin_unlock_irqrestore(&part->act_lock, irq_flags);
|
|
if (reason == xpcReactivating) {
|
|
/* we interrupt ourselves to reactivate partition */
|
|
xpc_IPI_send_reactivate(part);
|
|
}
|
|
return;
|
|
}
|
|
if (part->act_state == XPC_P_DEACTIVATING) {
|
|
if ((part->reason == xpcUnloading && reason != xpcUnloading) ||
|
|
reason == xpcReactivating) {
|
|
XPC_SET_REASON(part, reason, line);
|
|
}
|
|
spin_unlock_irqrestore(&part->act_lock, irq_flags);
|
|
return;
|
|
}
|
|
|
|
part->act_state = XPC_P_DEACTIVATING;
|
|
XPC_SET_REASON(part, reason, line);
|
|
|
|
spin_unlock_irqrestore(&part->act_lock, irq_flags);
|
|
|
|
if (XPC_SUPPORTS_DISENGAGE_REQUEST(part->remote_vars_version)) {
|
|
xpc_request_partition_disengage(part);
|
|
xpc_IPI_send_disengage(part);
|
|
|
|
/* set a timelimit on the disengage request */
|
|
part->disengage_request_timeout = jiffies +
|
|
(xpc_disengage_request_timelimit * HZ);
|
|
part->disengage_request_timer.expires =
|
|
part->disengage_request_timeout;
|
|
add_timer(&part->disengage_request_timer);
|
|
}
|
|
|
|
dev_dbg(xpc_part, "bringing partition %d down, reason = %d\n",
|
|
XPC_PARTID(part), reason);
|
|
|
|
xpc_partition_going_down(part, reason);
|
|
}
|
|
|
|
|
|
/*
|
|
* Mark specified partition as inactive.
|
|
*/
|
|
void
|
|
xpc_mark_partition_inactive(struct xpc_partition *part)
|
|
{
|
|
unsigned long irq_flags;
|
|
|
|
|
|
dev_dbg(xpc_part, "setting partition %d to INACTIVE\n",
|
|
XPC_PARTID(part));
|
|
|
|
spin_lock_irqsave(&part->act_lock, irq_flags);
|
|
part->act_state = XPC_P_INACTIVE;
|
|
spin_unlock_irqrestore(&part->act_lock, irq_flags);
|
|
part->remote_rp_pa = 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* SAL has provided a partition and machine mask. The partition mask
|
|
* contains a bit for each even nasid in our partition. The machine
|
|
* mask contains a bit for each even nasid in the entire machine.
|
|
*
|
|
* Using those two bit arrays, we can determine which nasids are
|
|
* known in the machine. Each should also have a reserved page
|
|
* initialized if they are available for partitioning.
|
|
*/
|
|
void
|
|
xpc_discovery(void)
|
|
{
|
|
void *remote_rp_base;
|
|
struct xpc_rsvd_page *remote_rp;
|
|
struct xpc_vars *remote_vars;
|
|
u64 remote_rp_pa;
|
|
u64 remote_vars_pa;
|
|
int region;
|
|
int region_size;
|
|
int max_regions;
|
|
int nasid;
|
|
struct xpc_rsvd_page *rp;
|
|
partid_t partid;
|
|
struct xpc_partition *part;
|
|
u64 *discovered_nasids;
|
|
enum xpc_retval ret;
|
|
|
|
|
|
remote_rp = xpc_kmalloc_cacheline_aligned(XPC_RP_HEADER_SIZE +
|
|
xp_nasid_mask_bytes,
|
|
GFP_KERNEL, &remote_rp_base);
|
|
if (remote_rp == NULL) {
|
|
return;
|
|
}
|
|
remote_vars = (struct xpc_vars *) remote_rp;
|
|
|
|
|
|
discovered_nasids = kzalloc(sizeof(u64) * xp_nasid_mask_words,
|
|
GFP_KERNEL);
|
|
if (discovered_nasids == NULL) {
|
|
kfree(remote_rp_base);
|
|
return;
|
|
}
|
|
|
|
rp = (struct xpc_rsvd_page *) xpc_rsvd_page;
|
|
|
|
/*
|
|
* The term 'region' in this context refers to the minimum number of
|
|
* nodes that can comprise an access protection grouping. The access
|
|
* protection is in regards to memory, IOI and IPI.
|
|
*/
|
|
max_regions = 64;
|
|
region_size = sn_region_size;
|
|
|
|
switch (region_size) {
|
|
case 128:
|
|
max_regions *= 2;
|
|
case 64:
|
|
max_regions *= 2;
|
|
case 32:
|
|
max_regions *= 2;
|
|
region_size = 16;
|
|
DBUG_ON(!is_shub2());
|
|
}
|
|
|
|
for (region = 0; region < max_regions; region++) {
|
|
|
|
if ((volatile int) xpc_exiting) {
|
|
break;
|
|
}
|
|
|
|
dev_dbg(xpc_part, "searching region %d\n", region);
|
|
|
|
for (nasid = (region * region_size * 2);
|
|
nasid < ((region + 1) * region_size * 2);
|
|
nasid += 2) {
|
|
|
|
if ((volatile int) xpc_exiting) {
|
|
break;
|
|
}
|
|
|
|
dev_dbg(xpc_part, "checking nasid %d\n", nasid);
|
|
|
|
|
|
if (XPC_NASID_IN_ARRAY(nasid, xpc_part_nasids)) {
|
|
dev_dbg(xpc_part, "PROM indicates Nasid %d is "
|
|
"part of the local partition; skipping "
|
|
"region\n", nasid);
|
|
break;
|
|
}
|
|
|
|
if (!(XPC_NASID_IN_ARRAY(nasid, xpc_mach_nasids))) {
|
|
dev_dbg(xpc_part, "PROM indicates Nasid %d was "
|
|
"not on Numa-Link network at reset\n",
|
|
nasid);
|
|
continue;
|
|
}
|
|
|
|
if (XPC_NASID_IN_ARRAY(nasid, discovered_nasids)) {
|
|
dev_dbg(xpc_part, "Nasid %d is part of a "
|
|
"partition which was previously "
|
|
"discovered\n", nasid);
|
|
continue;
|
|
}
|
|
|
|
|
|
/* pull over the reserved page structure */
|
|
|
|
ret = xpc_get_remote_rp(nasid, discovered_nasids,
|
|
remote_rp, &remote_rp_pa);
|
|
if (ret != xpcSuccess) {
|
|
dev_dbg(xpc_part, "unable to get reserved page "
|
|
"from nasid %d, reason=%d\n", nasid,
|
|
ret);
|
|
|
|
if (ret == xpcLocalPartid) {
|
|
break;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
remote_vars_pa = remote_rp->vars_pa;
|
|
|
|
partid = remote_rp->partid;
|
|
part = &xpc_partitions[partid];
|
|
|
|
|
|
/* pull over the cross partition variables */
|
|
|
|
ret = xpc_get_remote_vars(remote_vars_pa, remote_vars);
|
|
if (ret != xpcSuccess) {
|
|
dev_dbg(xpc_part, "unable to get XPC variables "
|
|
"from nasid %d, reason=%d\n", nasid,
|
|
ret);
|
|
|
|
XPC_DEACTIVATE_PARTITION(part, ret);
|
|
continue;
|
|
}
|
|
|
|
if (part->act_state != XPC_P_INACTIVE) {
|
|
dev_dbg(xpc_part, "partition %d on nasid %d is "
|
|
"already activating\n", partid, nasid);
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Register the remote partition's AMOs with SAL so it
|
|
* can handle and cleanup errors within that address
|
|
* range should the remote partition go down. We don't
|
|
* unregister this range because it is difficult to
|
|
* tell when outstanding writes to the remote partition
|
|
* are finished and thus when it is thus safe to
|
|
* unregister. This should not result in wasted space
|
|
* in the SAL xp_addr_region table because we should
|
|
* get the same page for remote_act_amos_pa after
|
|
* module reloads and system reboots.
|
|
*/
|
|
if (sn_register_xp_addr_region(
|
|
remote_vars->amos_page_pa,
|
|
PAGE_SIZE, 1) < 0) {
|
|
dev_dbg(xpc_part, "partition %d failed to "
|
|
"register xp_addr region 0x%016lx\n",
|
|
partid, remote_vars->amos_page_pa);
|
|
|
|
XPC_SET_REASON(part, xpcPhysAddrRegFailed,
|
|
__LINE__);
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* The remote nasid is valid and available.
|
|
* Send an interrupt to that nasid to notify
|
|
* it that we are ready to begin activation.
|
|
*/
|
|
dev_dbg(xpc_part, "sending an interrupt to AMO 0x%lx, "
|
|
"nasid %d, phys_cpuid 0x%x\n",
|
|
remote_vars->amos_page_pa,
|
|
remote_vars->act_nasid,
|
|
remote_vars->act_phys_cpuid);
|
|
|
|
if (XPC_SUPPORTS_DISENGAGE_REQUEST(remote_vars->
|
|
version)) {
|
|
part->remote_amos_page_pa =
|
|
remote_vars->amos_page_pa;
|
|
xpc_mark_partition_disengaged(part);
|
|
xpc_cancel_partition_disengage_request(part);
|
|
}
|
|
xpc_IPI_send_activate(remote_vars);
|
|
}
|
|
}
|
|
|
|
kfree(discovered_nasids);
|
|
kfree(remote_rp_base);
|
|
}
|
|
|
|
|
|
/*
|
|
* Given a partid, get the nasids owned by that partition from the
|
|
* remote partition's reserved page.
|
|
*/
|
|
enum xpc_retval
|
|
xpc_initiate_partid_to_nasids(partid_t partid, void *nasid_mask)
|
|
{
|
|
struct xpc_partition *part;
|
|
u64 part_nasid_pa;
|
|
int bte_res;
|
|
|
|
|
|
part = &xpc_partitions[partid];
|
|
if (part->remote_rp_pa == 0) {
|
|
return xpcPartitionDown;
|
|
}
|
|
|
|
memset(nasid_mask, 0, XP_NASID_MASK_BYTES);
|
|
|
|
part_nasid_pa = (u64) XPC_RP_PART_NASIDS(part->remote_rp_pa);
|
|
|
|
bte_res = xp_bte_copy(part_nasid_pa, (u64) nasid_mask,
|
|
xp_nasid_mask_bytes, (BTE_NOTIFY | BTE_WACQUIRE), NULL);
|
|
|
|
return xpc_map_bte_errors(bte_res);
|
|
}
|
|
|