2008-07-29 22:34:05 -07:00
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/*
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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) 2008 Silicon Graphics, Inc. All Rights Reserved.
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*/
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/*
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* Cross Partition Communication (XPC) sn2-based functions.
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*
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* Architecture specific implementation of common functions.
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*
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*/
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2008-07-29 22:34:06 -07:00
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#include <linux/delay.h>
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2008-07-29 22:34:05 -07:00
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#include <asm/uncached.h>
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2008-07-29 22:34:16 -07:00
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#include <asm/sn/mspec.h>
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2008-07-29 22:34:05 -07:00
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#include <asm/sn/sn_sal.h>
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#include "xpc.h"
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2008-07-29 22:34:13 -07:00
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/*
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* Define the number of u64s required to represent all the C-brick nasids
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* as a bitmap. The cross-partition kernel modules deal only with
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* C-brick nasids, thus the need for bitmaps which don't account for
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* odd-numbered (non C-brick) nasids.
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*/
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#define XPC_MAX_PHYSNODES_SN2 (MAX_NUMALINK_NODES / 2)
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#define XP_NASID_MASK_BYTES_SN2 ((XPC_MAX_PHYSNODES_SN2 + 7) / 8)
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#define XP_NASID_MASK_WORDS_SN2 ((XPC_MAX_PHYSNODES_SN2 + 63) / 64)
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/*
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* Memory for XPC's amo variables is allocated by the MSPEC driver. These
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* pages are located in the lowest granule. The lowest granule uses 4k pages
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* for cached references and an alternate TLB handler to never provide a
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* cacheable mapping for the entire region. This will prevent speculative
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* reading of cached copies of our lines from being issued which will cause
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* a PI FSB Protocol error to be generated by the SHUB. For XPC, we need 64
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* amo variables (based on XP_MAX_NPARTITIONS_SN2) to identify the senders of
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* NOTIFY IRQs, 128 amo variables (based on XP_NASID_MASK_WORDS_SN2) to identify
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* the senders of ACTIVATE IRQs, 1 amo variable to identify which remote
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* partitions (i.e., XPCs) consider themselves currently engaged with the
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* local XPC and 1 amo variable to request partition deactivation.
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*/
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#define XPC_NOTIFY_IRQ_AMOS_SN2 0
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#define XPC_ACTIVATE_IRQ_AMOS_SN2 (XPC_NOTIFY_IRQ_AMOS_SN2 + \
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XP_MAX_NPARTITIONS_SN2)
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#define XPC_ENGAGED_PARTITIONS_AMO_SN2 (XPC_ACTIVATE_IRQ_AMOS_SN2 + \
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XP_NASID_MASK_WORDS_SN2)
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#define XPC_DEACTIVATE_REQUEST_AMO_SN2 (XPC_ENGAGED_PARTITIONS_AMO_SN2 + 1)
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/*
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* Buffer used to store a local copy of portions of a remote partition's
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* reserved page (either its header and part_nasids mask, or its vars).
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*/
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static void *xpc_remote_copy_buffer_base_sn2;
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2008-07-29 22:34:18 -07:00
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static char *xpc_remote_copy_buffer_sn2;
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2008-07-29 22:34:13 -07:00
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2008-07-29 22:34:13 -07:00
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static struct xpc_vars_sn2 *xpc_vars_sn2;
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static struct xpc_vars_part_sn2 *xpc_vars_part_sn2;
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2008-07-29 22:34:05 -07:00
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2008-07-29 22:34:18 -07:00
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static int
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xpc_setup_partitions_sn_sn2(void)
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{
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/* nothing needs to be done */
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return 0;
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}
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2009-04-02 16:59:10 -07:00
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static void
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xpc_teardown_partitions_sn_sn2(void)
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{
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/* nothing needs to be done */
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}
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2008-07-29 22:34:09 -07:00
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/* SH_IPI_ACCESS shub register value on startup */
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2008-07-29 22:34:13 -07:00
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static u64 xpc_sh1_IPI_access_sn2;
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static u64 xpc_sh2_IPI_access0_sn2;
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static u64 xpc_sh2_IPI_access1_sn2;
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static u64 xpc_sh2_IPI_access2_sn2;
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static u64 xpc_sh2_IPI_access3_sn2;
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2008-07-29 22:34:09 -07:00
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/*
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* Change protections to allow IPI operations.
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*/
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static void
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xpc_allow_IPI_ops_sn2(void)
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{
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int node;
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int nasid;
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2008-07-29 22:34:14 -07:00
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/* !!! The following should get moved into SAL. */
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2008-07-29 22:34:09 -07:00
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if (is_shub2()) {
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2008-07-29 22:34:13 -07:00
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xpc_sh2_IPI_access0_sn2 =
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2008-07-29 22:34:09 -07:00
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(u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH2_IPI_ACCESS0));
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2008-07-29 22:34:13 -07:00
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xpc_sh2_IPI_access1_sn2 =
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2008-07-29 22:34:09 -07:00
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(u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH2_IPI_ACCESS1));
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2008-07-29 22:34:13 -07:00
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xpc_sh2_IPI_access2_sn2 =
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2008-07-29 22:34:09 -07:00
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(u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH2_IPI_ACCESS2));
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2008-07-29 22:34:13 -07:00
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xpc_sh2_IPI_access3_sn2 =
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2008-07-29 22:34:09 -07:00
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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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2008-07-29 22:34:13 -07:00
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xpc_sh1_IPI_access_sn2 =
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2008-07-29 22:34:09 -07:00
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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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}
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}
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/*
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* Restrict protections to disallow IPI operations.
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*/
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static void
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xpc_disallow_IPI_ops_sn2(void)
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{
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int node;
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int nasid;
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2008-07-29 22:34:14 -07:00
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/* !!! The following should get moved into SAL. */
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2008-07-29 22:34:09 -07:00
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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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2008-07-29 22:34:13 -07:00
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xpc_sh2_IPI_access0_sn2);
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2008-07-29 22:34:09 -07:00
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HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS1),
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2008-07-29 22:34:13 -07:00
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xpc_sh2_IPI_access1_sn2);
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2008-07-29 22:34:09 -07:00
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HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS2),
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2008-07-29 22:34:13 -07:00
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xpc_sh2_IPI_access2_sn2);
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2008-07-29 22:34:09 -07:00
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HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS3),
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2008-07-29 22:34:13 -07:00
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xpc_sh2_IPI_access3_sn2);
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2008-07-29 22:34:09 -07:00
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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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2008-07-29 22:34:13 -07:00
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xpc_sh1_IPI_access_sn2);
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2008-07-29 22:34:09 -07:00
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}
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}
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}
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2008-07-29 22:34:07 -07:00
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/*
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2008-07-29 22:34:10 -07:00
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* The following set of functions are used for the sending and receiving of
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* IRQs (also known as IPIs). There are two flavors of IRQs, one that is
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* associated with partition activity (SGI_XPC_ACTIVATE) and the other that
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* is associated with channel activity (SGI_XPC_NOTIFY).
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2008-07-29 22:34:07 -07:00
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*/
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static u64
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2008-07-29 22:34:11 -07:00
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xpc_receive_IRQ_amo_sn2(struct amo *amo)
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2008-07-29 22:34:07 -07:00
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{
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return FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_CLEAR);
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}
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static enum xp_retval
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2008-07-29 22:34:11 -07:00
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xpc_send_IRQ_sn2(struct amo *amo, u64 flag, int nasid, int phys_cpuid,
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int vector)
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2008-07-29 22:34:07 -07:00
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{
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int ret = 0;
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unsigned long irq_flags;
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local_irq_save(irq_flags);
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FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_OR, flag);
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sn_send_IPI_phys(nasid, phys_cpuid, vector, 0);
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/*
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* We must always use the nofault function regardless of whether we
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* are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we
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* didn't, we'd never know that the other partition is down and would
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2008-07-29 22:34:11 -07:00
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* keep sending IRQs and amos to it until the heartbeat times out.
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2008-07-29 22:34:07 -07:00
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*/
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ret = xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo->variable),
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xp_nofault_PIOR_target));
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local_irq_restore(irq_flags);
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2008-07-29 22:34:16 -07:00
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return (ret == 0) ? xpSuccess : xpPioReadError;
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2008-07-29 22:34:07 -07:00
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}
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2008-07-29 22:34:11 -07:00
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static struct amo *
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2008-07-29 22:34:10 -07:00
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xpc_init_IRQ_amo_sn2(int index)
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2008-07-29 22:34:07 -07:00
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{
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2008-07-29 22:34:13 -07:00
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struct amo *amo = xpc_vars_sn2->amos_page + index;
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2008-07-29 22:34:07 -07:00
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2008-07-29 22:34:11 -07:00
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(void)xpc_receive_IRQ_amo_sn2(amo); /* clear amo variable */
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2008-07-29 22:34:07 -07:00
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return amo;
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}
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/*
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2008-07-29 22:34:10 -07:00
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* Functions associated with SGI_XPC_ACTIVATE IRQ.
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2008-07-29 22:34:07 -07:00
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*/
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2008-07-29 22:34:09 -07:00
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/*
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* Notify the heartbeat check thread that an activate IRQ has been received.
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*/
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static irqreturn_t
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xpc_handle_activate_IRQ_sn2(int irq, void *dev_id)
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{
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2008-07-29 22:34:18 -07:00
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unsigned long irq_flags;
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spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
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xpc_activate_IRQ_rcvd++;
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spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
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2008-07-29 22:34:09 -07:00
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wake_up_interruptible(&xpc_activate_IRQ_wq);
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return IRQ_HANDLED;
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}
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2008-07-29 22:34:07 -07:00
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/*
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2008-07-29 22:34:11 -07:00
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* Flag the appropriate amo variable and send an IRQ to the specified node.
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2008-07-29 22:34:07 -07:00
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*/
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static void
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2008-07-29 22:34:16 -07:00
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xpc_send_activate_IRQ_sn2(unsigned long amos_page_pa, int from_nasid,
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int to_nasid, int to_phys_cpuid)
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2008-07-29 22:34:07 -07:00
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{
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2008-07-29 22:34:11 -07:00
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struct amo *amos = (struct amo *)__va(amos_page_pa +
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2008-07-29 22:34:13 -07:00
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(XPC_ACTIVATE_IRQ_AMOS_SN2 *
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2008-07-29 22:34:11 -07:00
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sizeof(struct amo)));
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2008-07-29 22:34:07 -07:00
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2008-07-29 22:34:14 -07:00
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(void)xpc_send_IRQ_sn2(&amos[BIT_WORD(from_nasid / 2)],
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BIT_MASK(from_nasid / 2), to_nasid,
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2008-07-29 22:34:07 -07:00
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to_phys_cpuid, SGI_XPC_ACTIVATE);
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}
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static void
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2008-07-29 22:34:10 -07:00
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xpc_send_local_activate_IRQ_sn2(int from_nasid)
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2008-07-29 22:34:07 -07:00
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{
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2008-07-29 22:34:18 -07:00
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unsigned long irq_flags;
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2008-07-29 22:34:13 -07:00
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struct amo *amos = (struct amo *)__va(xpc_vars_sn2->amos_page_pa +
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2008-07-29 22:34:13 -07:00
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(XPC_ACTIVATE_IRQ_AMOS_SN2 *
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2008-07-29 22:34:11 -07:00
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sizeof(struct amo)));
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2008-07-29 22:34:07 -07:00
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/* fake the sending and receipt of an activate IRQ from remote nasid */
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2008-07-29 22:34:14 -07:00
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FETCHOP_STORE_OP(TO_AMO((u64)&amos[BIT_WORD(from_nasid / 2)].variable),
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FETCHOP_OR, BIT_MASK(from_nasid / 2));
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2008-07-29 22:34:18 -07:00
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spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
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xpc_activate_IRQ_rcvd++;
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spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
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2008-07-29 22:34:09 -07:00
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wake_up_interruptible(&xpc_activate_IRQ_wq);
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2008-07-29 22:34:07 -07:00
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}
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2008-07-29 22:34:09 -07:00
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/*
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2008-07-29 22:34:10 -07:00
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* Functions associated with SGI_XPC_NOTIFY IRQ.
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2008-07-29 22:34:09 -07:00
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*/
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2008-07-29 22:34:07 -07:00
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2008-07-29 22:34:09 -07:00
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/*
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2008-07-29 22:34:10 -07:00
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* Check to see if any chctl flags were sent from the specified partition.
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2008-07-29 22:34:09 -07:00
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*/
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2008-07-29 22:34:07 -07:00
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static void
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2008-07-29 22:34:10 -07:00
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xpc_check_for_sent_chctl_flags_sn2(struct xpc_partition *part)
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2008-07-29 22:34:07 -07:00
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{
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2008-07-29 22:34:10 -07:00
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union xpc_channel_ctl_flags chctl;
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2008-07-29 22:34:09 -07:00
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unsigned long irq_flags;
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2008-07-29 22:34:07 -07:00
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2008-07-29 22:34:10 -07:00
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chctl.all_flags = xpc_receive_IRQ_amo_sn2(part->sn.sn2.
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local_chctl_amo_va);
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if (chctl.all_flags == 0)
|
2008-07-29 22:34:09 -07:00
|
|
|
return;
|
|
|
|
|
2008-07-29 22:34:10 -07:00
|
|
|
spin_lock_irqsave(&part->chctl_lock, irq_flags);
|
|
|
|
part->chctl.all_flags |= chctl.all_flags;
|
|
|
|
spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
|
2008-07-29 22:34:09 -07:00
|
|
|
|
2008-07-29 22:34:10 -07:00
|
|
|
dev_dbg(xpc_chan, "received notify IRQ from partid=%d, chctl.all_flags="
|
|
|
|
"0x%lx\n", XPC_PARTID(part), chctl.all_flags);
|
2008-07-29 22:34:09 -07:00
|
|
|
|
|
|
|
xpc_wakeup_channel_mgr(part);
|
2008-07-29 22:34:07 -07:00
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
/*
|
|
|
|
* Handle the receipt of a SGI_XPC_NOTIFY IRQ by seeing whether the specified
|
|
|
|
* partition actually sent it. Since SGI_XPC_NOTIFY IRQs may be shared by more
|
2008-07-29 22:34:11 -07:00
|
|
|
* than one partition, we use an amo structure per partition to indicate
|
2008-07-29 22:34:10 -07:00
|
|
|
* whether a partition has sent an IRQ or not. If it has, then wake up the
|
2008-07-29 22:34:09 -07:00
|
|
|
* associated kthread to handle it.
|
|
|
|
*
|
2008-07-29 22:34:10 -07:00
|
|
|
* All SGI_XPC_NOTIFY IRQs received by XPC are the result of IRQs sent by XPC
|
2008-07-29 22:34:09 -07:00
|
|
|
* running on other partitions.
|
|
|
|
*
|
|
|
|
* Noteworthy Arguments:
|
|
|
|
*
|
|
|
|
* irq - Interrupt ReQuest number. NOT USED.
|
|
|
|
*
|
2008-07-29 22:34:10 -07:00
|
|
|
* dev_id - partid of IRQ's potential sender.
|
2008-07-29 22:34:09 -07:00
|
|
|
*/
|
|
|
|
static irqreturn_t
|
|
|
|
xpc_handle_notify_IRQ_sn2(int irq, void *dev_id)
|
2008-07-29 22:34:07 -07:00
|
|
|
{
|
2008-07-29 22:34:09 -07:00
|
|
|
short partid = (short)(u64)dev_id;
|
|
|
|
struct xpc_partition *part = &xpc_partitions[partid];
|
|
|
|
|
2008-07-29 22:34:16 -07:00
|
|
|
DBUG_ON(partid < 0 || partid >= XP_MAX_NPARTITIONS_SN2);
|
2008-07-29 22:34:09 -07:00
|
|
|
|
|
|
|
if (xpc_part_ref(part)) {
|
2008-07-29 22:34:10 -07:00
|
|
|
xpc_check_for_sent_chctl_flags_sn2(part);
|
2008-07-29 22:34:09 -07:00
|
|
|
|
|
|
|
xpc_part_deref(part);
|
|
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
2008-07-29 22:34:07 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2008-07-29 22:34:10 -07:00
|
|
|
* Check to see if xpc_handle_notify_IRQ_sn2() dropped any IRQs on the floor
|
|
|
|
* because the write to their associated amo variable completed after the IRQ
|
2008-07-29 22:34:09 -07:00
|
|
|
* was received.
|
2008-07-29 22:34:07 -07:00
|
|
|
*/
|
2008-07-29 22:34:09 -07:00
|
|
|
static void
|
2008-07-29 22:34:10 -07:00
|
|
|
xpc_check_for_dropped_notify_IRQ_sn2(struct xpc_partition *part)
|
2008-07-29 22:34:09 -07:00
|
|
|
{
|
|
|
|
struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
|
|
|
|
|
|
|
|
if (xpc_part_ref(part)) {
|
2008-07-29 22:34:10 -07:00
|
|
|
xpc_check_for_sent_chctl_flags_sn2(part);
|
2008-07-29 22:34:09 -07:00
|
|
|
|
|
|
|
part_sn2->dropped_notify_IRQ_timer.expires = jiffies +
|
2008-07-29 22:34:10 -07:00
|
|
|
XPC_DROPPED_NOTIFY_IRQ_WAIT_INTERVAL;
|
2008-07-29 22:34:09 -07:00
|
|
|
add_timer(&part_sn2->dropped_notify_IRQ_timer);
|
|
|
|
xpc_part_deref(part);
|
|
|
|
}
|
|
|
|
}
|
2008-07-29 22:34:07 -07:00
|
|
|
|
|
|
|
/*
|
2008-07-29 22:34:10 -07:00
|
|
|
* Send a notify IRQ to the remote partition that is associated with the
|
2008-07-29 22:34:07 -07:00
|
|
|
* specified channel.
|
|
|
|
*/
|
|
|
|
static void
|
2008-07-29 22:34:10 -07:00
|
|
|
xpc_send_notify_IRQ_sn2(struct xpc_channel *ch, u8 chctl_flag,
|
|
|
|
char *chctl_flag_string, unsigned long *irq_flags)
|
2008-07-29 22:34:07 -07:00
|
|
|
{
|
|
|
|
struct xpc_partition *part = &xpc_partitions[ch->partid];
|
2008-07-29 22:34:09 -07:00
|
|
|
struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
|
2008-07-29 22:34:10 -07:00
|
|
|
union xpc_channel_ctl_flags chctl = { 0 };
|
2008-07-29 22:34:07 -07:00
|
|
|
enum xp_retval ret;
|
|
|
|
|
2008-07-29 22:34:18 -07:00
|
|
|
if (likely(part->act_state != XPC_P_AS_DEACTIVATING)) {
|
2008-07-29 22:34:10 -07:00
|
|
|
chctl.flags[ch->number] = chctl_flag;
|
|
|
|
ret = xpc_send_IRQ_sn2(part_sn2->remote_chctl_amo_va,
|
|
|
|
chctl.all_flags,
|
|
|
|
part_sn2->notify_IRQ_nasid,
|
|
|
|
part_sn2->notify_IRQ_phys_cpuid,
|
2008-07-29 22:34:07 -07:00
|
|
|
SGI_XPC_NOTIFY);
|
|
|
|
dev_dbg(xpc_chan, "%s sent to partid=%d, channel=%d, ret=%d\n",
|
2008-07-29 22:34:10 -07:00
|
|
|
chctl_flag_string, ch->partid, ch->number, ret);
|
2008-07-29 22:34:07 -07:00
|
|
|
if (unlikely(ret != xpSuccess)) {
|
|
|
|
if (irq_flags != NULL)
|
|
|
|
spin_unlock_irqrestore(&ch->lock, *irq_flags);
|
|
|
|
XPC_DEACTIVATE_PARTITION(part, ret);
|
|
|
|
if (irq_flags != NULL)
|
|
|
|
spin_lock_irqsave(&ch->lock, *irq_flags);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:10 -07:00
|
|
|
#define XPC_SEND_NOTIFY_IRQ_SN2(_ch, _ipi_f, _irq_f) \
|
|
|
|
xpc_send_notify_IRQ_sn2(_ch, _ipi_f, #_ipi_f, _irq_f)
|
2008-07-29 22:34:07 -07:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Make it look like the remote partition, which is associated with the
|
2008-07-29 22:34:10 -07:00
|
|
|
* specified channel, sent us a notify IRQ. This faked IRQ will be handled
|
|
|
|
* by xpc_check_for_dropped_notify_IRQ_sn2().
|
2008-07-29 22:34:07 -07:00
|
|
|
*/
|
|
|
|
static void
|
2008-07-29 22:34:10 -07:00
|
|
|
xpc_send_local_notify_IRQ_sn2(struct xpc_channel *ch, u8 chctl_flag,
|
|
|
|
char *chctl_flag_string)
|
2008-07-29 22:34:07 -07:00
|
|
|
{
|
|
|
|
struct xpc_partition *part = &xpc_partitions[ch->partid];
|
2008-07-29 22:34:10 -07:00
|
|
|
union xpc_channel_ctl_flags chctl = { 0 };
|
2008-07-29 22:34:07 -07:00
|
|
|
|
2008-07-29 22:34:10 -07:00
|
|
|
chctl.flags[ch->number] = chctl_flag;
|
|
|
|
FETCHOP_STORE_OP(TO_AMO((u64)&part->sn.sn2.local_chctl_amo_va->
|
|
|
|
variable), FETCHOP_OR, chctl.all_flags);
|
2008-07-29 22:34:07 -07:00
|
|
|
dev_dbg(xpc_chan, "%s sent local from partid=%d, channel=%d\n",
|
2008-07-29 22:34:10 -07:00
|
|
|
chctl_flag_string, ch->partid, ch->number);
|
2008-07-29 22:34:07 -07:00
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:10 -07:00
|
|
|
#define XPC_SEND_LOCAL_NOTIFY_IRQ_SN2(_ch, _ipi_f) \
|
|
|
|
xpc_send_local_notify_IRQ_sn2(_ch, _ipi_f, #_ipi_f)
|
2008-07-29 22:34:07 -07:00
|
|
|
|
|
|
|
static void
|
2008-07-29 22:34:10 -07:00
|
|
|
xpc_send_chctl_closerequest_sn2(struct xpc_channel *ch,
|
|
|
|
unsigned long *irq_flags)
|
2008-07-29 22:34:07 -07:00
|
|
|
{
|
2008-07-29 22:34:18 -07:00
|
|
|
struct xpc_openclose_args *args = ch->sn.sn2.local_openclose_args;
|
2008-07-29 22:34:07 -07:00
|
|
|
|
|
|
|
args->reason = ch->reason;
|
2008-07-29 22:34:10 -07:00
|
|
|
XPC_SEND_NOTIFY_IRQ_SN2(ch, XPC_CHCTL_CLOSEREQUEST, irq_flags);
|
2008-07-29 22:34:07 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
2008-07-29 22:34:10 -07:00
|
|
|
xpc_send_chctl_closereply_sn2(struct xpc_channel *ch, unsigned long *irq_flags)
|
2008-07-29 22:34:07 -07:00
|
|
|
{
|
2008-07-29 22:34:10 -07:00
|
|
|
XPC_SEND_NOTIFY_IRQ_SN2(ch, XPC_CHCTL_CLOSEREPLY, irq_flags);
|
2008-07-29 22:34:07 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
2008-07-29 22:34:10 -07:00
|
|
|
xpc_send_chctl_openrequest_sn2(struct xpc_channel *ch, unsigned long *irq_flags)
|
2008-07-29 22:34:07 -07:00
|
|
|
{
|
2008-07-29 22:34:18 -07:00
|
|
|
struct xpc_openclose_args *args = ch->sn.sn2.local_openclose_args;
|
2008-07-29 22:34:07 -07:00
|
|
|
|
2008-07-29 22:34:19 -07:00
|
|
|
args->entry_size = ch->entry_size;
|
2008-07-29 22:34:07 -07:00
|
|
|
args->local_nentries = ch->local_nentries;
|
2008-07-29 22:34:10 -07:00
|
|
|
XPC_SEND_NOTIFY_IRQ_SN2(ch, XPC_CHCTL_OPENREQUEST, irq_flags);
|
2008-07-29 22:34:07 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
2008-07-29 22:34:10 -07:00
|
|
|
xpc_send_chctl_openreply_sn2(struct xpc_channel *ch, unsigned long *irq_flags)
|
2008-07-29 22:34:07 -07:00
|
|
|
{
|
2008-07-29 22:34:18 -07:00
|
|
|
struct xpc_openclose_args *args = ch->sn.sn2.local_openclose_args;
|
2008-07-29 22:34:07 -07:00
|
|
|
|
|
|
|
args->remote_nentries = ch->remote_nentries;
|
|
|
|
args->local_nentries = ch->local_nentries;
|
2008-07-29 22:34:18 -07:00
|
|
|
args->local_msgqueue_pa = xp_pa(ch->sn.sn2.local_msgqueue);
|
2008-07-29 22:34:10 -07:00
|
|
|
XPC_SEND_NOTIFY_IRQ_SN2(ch, XPC_CHCTL_OPENREPLY, irq_flags);
|
2008-07-29 22:34:07 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
2008-07-29 22:34:10 -07:00
|
|
|
xpc_send_chctl_msgrequest_sn2(struct xpc_channel *ch)
|
2008-07-29 22:34:07 -07:00
|
|
|
{
|
2008-07-29 22:34:10 -07:00
|
|
|
XPC_SEND_NOTIFY_IRQ_SN2(ch, XPC_CHCTL_MSGREQUEST, NULL);
|
2008-07-29 22:34:07 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
2008-07-29 22:34:10 -07:00
|
|
|
xpc_send_chctl_local_msgrequest_sn2(struct xpc_channel *ch)
|
2008-07-29 22:34:07 -07:00
|
|
|
{
|
2008-07-29 22:34:10 -07:00
|
|
|
XPC_SEND_LOCAL_NOTIFY_IRQ_SN2(ch, XPC_CHCTL_MSGREQUEST);
|
2008-07-29 22:34:07 -07:00
|
|
|
}
|
|
|
|
|
2009-04-02 16:59:10 -07:00
|
|
|
static enum xp_retval
|
2008-07-29 22:34:18 -07:00
|
|
|
xpc_save_remote_msgqueue_pa_sn2(struct xpc_channel *ch,
|
|
|
|
unsigned long msgqueue_pa)
|
|
|
|
{
|
|
|
|
ch->sn.sn2.remote_msgqueue_pa = msgqueue_pa;
|
2009-04-02 16:59:10 -07:00
|
|
|
return xpSuccess;
|
2008-07-29 22:34:18 -07:00
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:07 -07:00
|
|
|
/*
|
|
|
|
* This next set of functions are used to keep track of when a partition is
|
|
|
|
* potentially engaged in accessing memory belonging to another partition.
|
|
|
|
*/
|
|
|
|
|
|
|
|
static void
|
2008-07-29 22:34:09 -07:00
|
|
|
xpc_indicate_partition_engaged_sn2(struct xpc_partition *part)
|
2008-07-29 22:34:07 -07:00
|
|
|
{
|
|
|
|
unsigned long irq_flags;
|
2008-07-29 22:34:11 -07:00
|
|
|
struct amo *amo = (struct amo *)__va(part->sn.sn2.remote_amos_page_pa +
|
2008-07-29 22:34:13 -07:00
|
|
|
(XPC_ENGAGED_PARTITIONS_AMO_SN2 *
|
2008-07-29 22:34:11 -07:00
|
|
|
sizeof(struct amo)));
|
2008-07-29 22:34:07 -07:00
|
|
|
|
|
|
|
local_irq_save(irq_flags);
|
|
|
|
|
2008-07-29 22:34:11 -07:00
|
|
|
/* set bit corresponding to our partid in remote partition's amo */
|
2008-07-29 22:34:07 -07:00
|
|
|
FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_OR,
|
2008-07-29 22:34:14 -07:00
|
|
|
BIT(sn_partition_id));
|
|
|
|
|
2008-07-29 22:34:07 -07:00
|
|
|
/*
|
|
|
|
* We must always use the nofault function regardless of whether we
|
|
|
|
* are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we
|
|
|
|
* didn't, we'd never know that the other partition is down and would
|
2008-07-29 22:34:11 -07:00
|
|
|
* keep sending IRQs and amos to it until the heartbeat times out.
|
2008-07-29 22:34:07 -07:00
|
|
|
*/
|
|
|
|
(void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo->
|
|
|
|
variable),
|
|
|
|
xp_nofault_PIOR_target));
|
|
|
|
|
|
|
|
local_irq_restore(irq_flags);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
2008-07-29 22:34:09 -07:00
|
|
|
xpc_indicate_partition_disengaged_sn2(struct xpc_partition *part)
|
2008-07-29 22:34:07 -07:00
|
|
|
{
|
2008-07-29 22:34:09 -07:00
|
|
|
struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
|
2008-07-29 22:34:07 -07:00
|
|
|
unsigned long irq_flags;
|
2008-07-29 22:34:11 -07:00
|
|
|
struct amo *amo = (struct amo *)__va(part_sn2->remote_amos_page_pa +
|
2008-07-29 22:34:13 -07:00
|
|
|
(XPC_ENGAGED_PARTITIONS_AMO_SN2 *
|
2008-07-29 22:34:11 -07:00
|
|
|
sizeof(struct amo)));
|
2008-07-29 22:34:07 -07:00
|
|
|
|
|
|
|
local_irq_save(irq_flags);
|
|
|
|
|
2008-07-29 22:34:11 -07:00
|
|
|
/* clear bit corresponding to our partid in remote partition's amo */
|
2008-07-29 22:34:07 -07:00
|
|
|
FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND,
|
2008-07-29 22:34:14 -07:00
|
|
|
~BIT(sn_partition_id));
|
|
|
|
|
2008-07-29 22:34:07 -07:00
|
|
|
/*
|
|
|
|
* We must always use the nofault function regardless of whether we
|
|
|
|
* are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we
|
|
|
|
* didn't, we'd never know that the other partition is down and would
|
2008-07-29 22:34:11 -07:00
|
|
|
* keep sending IRQs and amos to it until the heartbeat times out.
|
2008-07-29 22:34:07 -07:00
|
|
|
*/
|
|
|
|
(void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo->
|
|
|
|
variable),
|
|
|
|
xp_nofault_PIOR_target));
|
|
|
|
|
|
|
|
local_irq_restore(irq_flags);
|
|
|
|
|
|
|
|
/*
|
2008-07-29 22:34:09 -07:00
|
|
|
* Send activate IRQ to get other side to see that we've cleared our
|
2008-07-29 22:34:11 -07:00
|
|
|
* bit in their engaged partitions amo.
|
2008-07-29 22:34:07 -07:00
|
|
|
*/
|
2008-07-29 22:34:10 -07:00
|
|
|
xpc_send_activate_IRQ_sn2(part_sn2->remote_amos_page_pa,
|
2008-07-29 22:34:09 -07:00
|
|
|
cnodeid_to_nasid(0),
|
|
|
|
part_sn2->activate_IRQ_nasid,
|
|
|
|
part_sn2->activate_IRQ_phys_cpuid);
|
2008-07-29 22:34:07 -07:00
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:18 -07:00
|
|
|
static void
|
|
|
|
xpc_assume_partition_disengaged_sn2(short partid)
|
|
|
|
{
|
|
|
|
struct amo *amo = xpc_vars_sn2->amos_page +
|
|
|
|
XPC_ENGAGED_PARTITIONS_AMO_SN2;
|
|
|
|
|
|
|
|
/* clear bit(s) based on partid mask in our partition's amo */
|
|
|
|
FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND,
|
|
|
|
~BIT(partid));
|
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
static int
|
|
|
|
xpc_partition_engaged_sn2(short partid)
|
2008-07-29 22:34:07 -07:00
|
|
|
{
|
2008-07-29 22:34:13 -07:00
|
|
|
struct amo *amo = xpc_vars_sn2->amos_page +
|
|
|
|
XPC_ENGAGED_PARTITIONS_AMO_SN2;
|
2008-07-29 22:34:07 -07:00
|
|
|
|
2008-07-29 22:34:11 -07:00
|
|
|
/* our partition's amo variable ANDed with partid mask */
|
2008-07-29 22:34:07 -07:00
|
|
|
return (FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_LOAD) &
|
2008-07-29 22:34:14 -07:00
|
|
|
BIT(partid)) != 0;
|
2008-07-29 22:34:07 -07:00
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
static int
|
|
|
|
xpc_any_partition_engaged_sn2(void)
|
2008-07-29 22:34:07 -07:00
|
|
|
{
|
2008-07-29 22:34:13 -07:00
|
|
|
struct amo *amo = xpc_vars_sn2->amos_page +
|
|
|
|
XPC_ENGAGED_PARTITIONS_AMO_SN2;
|
2008-07-29 22:34:07 -07:00
|
|
|
|
2008-07-29 22:34:11 -07:00
|
|
|
/* our partition's amo variable */
|
2008-07-29 22:34:09 -07:00
|
|
|
return FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_LOAD) != 0;
|
2008-07-29 22:34:07 -07:00
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
/* original protection values for each node */
|
|
|
|
static u64 xpc_prot_vec_sn2[MAX_NUMNODES];
|
|
|
|
|
|
|
|
/*
|
2008-07-29 22:34:11 -07:00
|
|
|
* Change protections to allow amo operations on non-Shub 1.1 systems.
|
2008-07-29 22:34:09 -07:00
|
|
|
*/
|
|
|
|
static enum xp_retval
|
2008-07-29 22:34:11 -07:00
|
|
|
xpc_allow_amo_ops_sn2(struct amo *amos_page)
|
2008-07-29 22:34:09 -07:00
|
|
|
{
|
2008-11-05 16:27:22 -07:00
|
|
|
enum xp_retval ret = xpSuccess;
|
2008-07-29 22:34:09 -07:00
|
|
|
|
|
|
|
/*
|
|
|
|
* On SHUB 1.1, we cannot call sn_change_memprotect() since the BIST
|
|
|
|
* collides with memory operations. On those systems we call
|
2008-07-29 22:34:11 -07:00
|
|
|
* xpc_allow_amo_ops_shub_wars_1_1_sn2() instead.
|
2008-07-29 22:34:09 -07:00
|
|
|
*/
|
2008-11-05 16:27:22 -07:00
|
|
|
if (!enable_shub_wars_1_1())
|
|
|
|
ret = xp_expand_memprotect(ia64_tpa((u64)amos_page), PAGE_SIZE);
|
|
|
|
|
|
|
|
return ret;
|
2008-07-29 22:34:09 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2008-07-29 22:34:11 -07:00
|
|
|
* Change protections to allow amo operations on Shub 1.1 systems.
|
2008-07-29 22:34:09 -07:00
|
|
|
*/
|
|
|
|
static void
|
2008-07-29 22:34:11 -07:00
|
|
|
xpc_allow_amo_ops_shub_wars_1_1_sn2(void)
|
2008-07-29 22:34:09 -07:00
|
|
|
{
|
|
|
|
int node;
|
|
|
|
int nasid;
|
|
|
|
|
|
|
|
if (!enable_shub_wars_1_1())
|
|
|
|
return;
|
|
|
|
|
|
|
|
for_each_online_node(node) {
|
|
|
|
nasid = cnodeid_to_nasid(node);
|
|
|
|
/* save current protection values */
|
|
|
|
xpc_prot_vec_sn2[node] =
|
|
|
|
(u64)HUB_L((u64 *)GLOBAL_MMR_ADDR(nasid,
|
|
|
|
SH1_MD_DQLP_MMR_DIR_PRIVEC0));
|
|
|
|
/* open up everything */
|
|
|
|
HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid,
|
|
|
|
SH1_MD_DQLP_MMR_DIR_PRIVEC0),
|
|
|
|
-1UL);
|
|
|
|
HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid,
|
|
|
|
SH1_MD_DQRP_MMR_DIR_PRIVEC0),
|
|
|
|
-1UL);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:16 -07:00
|
|
|
static enum xp_retval
|
2008-07-29 22:34:16 -07:00
|
|
|
xpc_get_partition_rsvd_page_pa_sn2(void *buf, u64 *cookie, unsigned long *rp_pa,
|
2008-07-29 22:34:16 -07:00
|
|
|
size_t *len)
|
|
|
|
{
|
|
|
|
s64 status;
|
|
|
|
enum xp_retval ret;
|
|
|
|
|
2008-07-29 22:34:16 -07:00
|
|
|
status = sn_partition_reserved_page_pa((u64)buf, cookie, rp_pa, len);
|
2008-07-29 22:34:16 -07:00
|
|
|
if (status == SALRET_OK)
|
|
|
|
ret = xpSuccess;
|
|
|
|
else if (status == SALRET_MORE_PASSES)
|
|
|
|
ret = xpNeedMoreInfo;
|
|
|
|
else
|
|
|
|
ret = xpSalError;
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2008-07-29 22:34:18 -07:00
|
|
|
static int
|
|
|
|
xpc_setup_rsvd_page_sn_sn2(struct xpc_rsvd_page *rp)
|
2008-07-29 22:34:05 -07:00
|
|
|
{
|
2008-07-29 22:34:11 -07:00
|
|
|
struct amo *amos_page;
|
2008-07-29 22:34:05 -07:00
|
|
|
int i;
|
|
|
|
int ret;
|
|
|
|
|
2008-07-29 22:34:13 -07:00
|
|
|
xpc_vars_sn2 = XPC_RP_VARS(rp);
|
2008-07-29 22:34:05 -07:00
|
|
|
|
2008-07-29 22:34:16 -07:00
|
|
|
rp->sn.vars_pa = xp_pa(xpc_vars_sn2);
|
2008-07-29 22:34:05 -07:00
|
|
|
|
2008-07-29 22:34:06 -07:00
|
|
|
/* vars_part array follows immediately after vars */
|
2008-07-29 22:34:13 -07:00
|
|
|
xpc_vars_part_sn2 = (struct xpc_vars_part_sn2 *)((u8 *)XPC_RP_VARS(rp) +
|
|
|
|
XPC_RP_VARS_SIZE);
|
2008-07-29 22:34:06 -07:00
|
|
|
|
2008-07-29 22:34:05 -07:00
|
|
|
/*
|
2008-07-29 22:34:13 -07:00
|
|
|
* Before clearing xpc_vars_sn2, see if a page of amos had been
|
|
|
|
* previously allocated. If not we'll need to allocate one and set
|
|
|
|
* permissions so that cross-partition amos are allowed.
|
2008-07-29 22:34:05 -07:00
|
|
|
*
|
2008-07-29 22:34:11 -07:00
|
|
|
* The allocated amo page needs MCA reporting to remain disabled after
|
2008-07-29 22:34:05 -07:00
|
|
|
* XPC has unloaded. To make this work, we keep a copy of the pointer
|
2008-07-29 22:34:13 -07:00
|
|
|
* to this page (i.e., amos_page) in the struct xpc_vars_sn2 structure,
|
2008-07-29 22:34:05 -07:00
|
|
|
* which is pointed to by the reserved page, and re-use that saved copy
|
2008-07-29 22:34:11 -07:00
|
|
|
* on subsequent loads of XPC. This amo page is never freed, and its
|
2008-07-29 22:34:05 -07:00
|
|
|
* memory protections are never restricted.
|
|
|
|
*/
|
2008-07-29 22:34:13 -07:00
|
|
|
amos_page = xpc_vars_sn2->amos_page;
|
2008-07-29 22:34:05 -07:00
|
|
|
if (amos_page == NULL) {
|
2008-07-29 22:34:11 -07:00
|
|
|
amos_page = (struct amo *)TO_AMO(uncached_alloc_page(0, 1));
|
2008-07-29 22:34:05 -07:00
|
|
|
if (amos_page == NULL) {
|
2008-07-29 22:34:11 -07:00
|
|
|
dev_err(xpc_part, "can't allocate page of amos\n");
|
2008-07-29 22:34:18 -07:00
|
|
|
return -ENOMEM;
|
2008-07-29 22:34:05 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2008-07-29 22:34:11 -07:00
|
|
|
* Open up amo-R/W to cpu. This is done on Shub 1.1 systems
|
|
|
|
* when xpc_allow_amo_ops_shub_wars_1_1_sn2() is called.
|
2008-07-29 22:34:05 -07:00
|
|
|
*/
|
2008-07-29 22:34:11 -07:00
|
|
|
ret = xpc_allow_amo_ops_sn2(amos_page);
|
2008-07-29 22:34:09 -07:00
|
|
|
if (ret != xpSuccess) {
|
2008-07-29 22:34:11 -07:00
|
|
|
dev_err(xpc_part, "can't allow amo operations\n");
|
2008-07-29 22:34:09 -07:00
|
|
|
uncached_free_page(__IA64_UNCACHED_OFFSET |
|
|
|
|
TO_PHYS((u64)amos_page), 1);
|
2008-07-29 22:34:18 -07:00
|
|
|
return -EPERM;
|
2008-07-29 22:34:05 -07:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:13 -07:00
|
|
|
/* clear xpc_vars_sn2 */
|
|
|
|
memset(xpc_vars_sn2, 0, sizeof(struct xpc_vars_sn2));
|
2008-07-29 22:34:05 -07:00
|
|
|
|
2008-07-29 22:34:13 -07:00
|
|
|
xpc_vars_sn2->version = XPC_V_VERSION;
|
|
|
|
xpc_vars_sn2->activate_IRQ_nasid = cpuid_to_nasid(0);
|
|
|
|
xpc_vars_sn2->activate_IRQ_phys_cpuid = cpu_physical_id(0);
|
2008-07-29 22:34:16 -07:00
|
|
|
xpc_vars_sn2->vars_part_pa = xp_pa(xpc_vars_part_sn2);
|
2008-07-29 22:34:13 -07:00
|
|
|
xpc_vars_sn2->amos_page_pa = ia64_tpa((u64)amos_page);
|
|
|
|
xpc_vars_sn2->amos_page = amos_page; /* save for next load of XPC */
|
2008-07-29 22:34:05 -07:00
|
|
|
|
2008-07-29 22:34:13 -07:00
|
|
|
/* clear xpc_vars_part_sn2 */
|
|
|
|
memset((u64 *)xpc_vars_part_sn2, 0, sizeof(struct xpc_vars_part_sn2) *
|
2008-07-29 22:34:16 -07:00
|
|
|
XP_MAX_NPARTITIONS_SN2);
|
2008-07-29 22:34:05 -07:00
|
|
|
|
2008-07-29 22:34:11 -07:00
|
|
|
/* initialize the activate IRQ related amo variables */
|
2008-07-29 22:34:14 -07:00
|
|
|
for (i = 0; i < xpc_nasid_mask_nlongs; i++)
|
2008-07-29 22:34:13 -07:00
|
|
|
(void)xpc_init_IRQ_amo_sn2(XPC_ACTIVATE_IRQ_AMOS_SN2 + i);
|
2008-07-29 22:34:05 -07:00
|
|
|
|
2008-07-29 22:34:11 -07:00
|
|
|
/* initialize the engaged remote partitions related amo variables */
|
2008-07-29 22:34:13 -07:00
|
|
|
(void)xpc_init_IRQ_amo_sn2(XPC_ENGAGED_PARTITIONS_AMO_SN2);
|
|
|
|
(void)xpc_init_IRQ_amo_sn2(XPC_DEACTIVATE_REQUEST_AMO_SN2);
|
2008-07-29 22:34:07 -07:00
|
|
|
|
2008-07-29 22:34:18 -07:00
|
|
|
return 0;
|
2008-07-29 22:34:07 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
xpc_increment_heartbeat_sn2(void)
|
|
|
|
{
|
2008-07-29 22:34:13 -07:00
|
|
|
xpc_vars_sn2->heartbeat++;
|
2008-07-29 22:34:07 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
xpc_offline_heartbeat_sn2(void)
|
|
|
|
{
|
|
|
|
xpc_increment_heartbeat_sn2();
|
2008-07-29 22:34:13 -07:00
|
|
|
xpc_vars_sn2->heartbeat_offline = 1;
|
2008-07-29 22:34:07 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
xpc_online_heartbeat_sn2(void)
|
|
|
|
{
|
|
|
|
xpc_increment_heartbeat_sn2();
|
2008-07-29 22:34:13 -07:00
|
|
|
xpc_vars_sn2->heartbeat_offline = 0;
|
2008-07-29 22:34:07 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
xpc_heartbeat_init_sn2(void)
|
|
|
|
{
|
2008-07-29 22:34:13 -07:00
|
|
|
DBUG_ON(xpc_vars_sn2 == NULL);
|
2008-07-29 22:34:07 -07:00
|
|
|
|
2008-07-29 22:34:13 -07:00
|
|
|
bitmap_zero(xpc_vars_sn2->heartbeating_to_mask, XP_MAX_NPARTITIONS_SN2);
|
|
|
|
xpc_heartbeating_to_mask = &xpc_vars_sn2->heartbeating_to_mask[0];
|
2008-07-29 22:34:07 -07:00
|
|
|
xpc_online_heartbeat_sn2();
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
xpc_heartbeat_exit_sn2(void)
|
|
|
|
{
|
|
|
|
xpc_offline_heartbeat_sn2();
|
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:17 -07:00
|
|
|
static enum xp_retval
|
|
|
|
xpc_get_remote_heartbeat_sn2(struct xpc_partition *part)
|
2008-07-29 22:34:07 -07:00
|
|
|
{
|
|
|
|
struct xpc_vars_sn2 *remote_vars;
|
|
|
|
enum xp_retval ret;
|
|
|
|
|
2008-07-29 22:34:13 -07:00
|
|
|
remote_vars = (struct xpc_vars_sn2 *)xpc_remote_copy_buffer_sn2;
|
2008-07-29 22:34:07 -07:00
|
|
|
|
2008-07-29 22:34:17 -07:00
|
|
|
/* pull the remote vars structure that contains the heartbeat */
|
|
|
|
ret = xp_remote_memcpy(xp_pa(remote_vars),
|
|
|
|
part->sn.sn2.remote_vars_pa,
|
|
|
|
XPC_RP_VARS_SIZE);
|
|
|
|
if (ret != xpSuccess)
|
|
|
|
return ret;
|
2008-07-29 22:34:07 -07:00
|
|
|
|
2008-07-29 22:34:17 -07:00
|
|
|
dev_dbg(xpc_part, "partid=%d, heartbeat=%ld, last_heartbeat=%ld, "
|
|
|
|
"heartbeat_offline=%ld, HB_mask[0]=0x%lx\n", XPC_PARTID(part),
|
|
|
|
remote_vars->heartbeat, part->last_heartbeat,
|
|
|
|
remote_vars->heartbeat_offline,
|
|
|
|
remote_vars->heartbeating_to_mask[0]);
|
|
|
|
|
|
|
|
if ((remote_vars->heartbeat == part->last_heartbeat &&
|
|
|
|
remote_vars->heartbeat_offline == 0) ||
|
|
|
|
!xpc_hb_allowed(sn_partition_id,
|
|
|
|
&remote_vars->heartbeating_to_mask)) {
|
|
|
|
ret = xpNoHeartbeat;
|
|
|
|
} else {
|
2008-07-29 22:34:07 -07:00
|
|
|
part->last_heartbeat = remote_vars->heartbeat;
|
|
|
|
}
|
2008-07-29 22:34:17 -07:00
|
|
|
|
|
|
|
return ret;
|
2008-07-29 22:34:07 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* 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 xp_retval
|
2008-07-29 22:34:16 -07:00
|
|
|
xpc_get_remote_vars_sn2(unsigned long remote_vars_pa,
|
|
|
|
struct xpc_vars_sn2 *remote_vars)
|
2008-07-29 22:34:07 -07:00
|
|
|
{
|
|
|
|
enum xp_retval ret;
|
|
|
|
|
|
|
|
if (remote_vars_pa == 0)
|
|
|
|
return xpVarsNotSet;
|
|
|
|
|
|
|
|
/* pull over the cross partition variables */
|
2008-07-29 22:34:16 -07:00
|
|
|
ret = xp_remote_memcpy(xp_pa(remote_vars), remote_vars_pa,
|
2008-07-29 22:34:07 -07:00
|
|
|
XPC_RP_VARS_SIZE);
|
|
|
|
if (ret != xpSuccess)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
if (XPC_VERSION_MAJOR(remote_vars->version) !=
|
|
|
|
XPC_VERSION_MAJOR(XPC_V_VERSION)) {
|
|
|
|
return xpBadVersion;
|
|
|
|
}
|
2008-07-29 22:34:05 -07:00
|
|
|
|
|
|
|
return xpSuccess;
|
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:07 -07:00
|
|
|
static void
|
2008-07-29 22:34:09 -07:00
|
|
|
xpc_request_partition_activation_sn2(struct xpc_rsvd_page *remote_rp,
|
2008-07-29 22:34:16 -07:00
|
|
|
unsigned long remote_rp_pa, int nasid)
|
2008-07-29 22:34:07 -07:00
|
|
|
{
|
2008-07-29 22:34:10 -07:00
|
|
|
xpc_send_local_activate_IRQ_sn2(nasid);
|
2008-07-29 22:34:09 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
xpc_request_partition_reactivation_sn2(struct xpc_partition *part)
|
|
|
|
{
|
2008-07-29 22:34:10 -07:00
|
|
|
xpc_send_local_activate_IRQ_sn2(part->sn.sn2.activate_IRQ_nasid);
|
2008-07-29 22:34:09 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
xpc_request_partition_deactivation_sn2(struct xpc_partition *part)
|
|
|
|
{
|
|
|
|
struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
|
|
|
|
unsigned long irq_flags;
|
2008-07-29 22:34:11 -07:00
|
|
|
struct amo *amo = (struct amo *)__va(part_sn2->remote_amos_page_pa +
|
2008-07-29 22:34:13 -07:00
|
|
|
(XPC_DEACTIVATE_REQUEST_AMO_SN2 *
|
2008-07-29 22:34:11 -07:00
|
|
|
sizeof(struct amo)));
|
2008-07-29 22:34:09 -07:00
|
|
|
|
|
|
|
local_irq_save(irq_flags);
|
|
|
|
|
2008-07-29 22:34:11 -07:00
|
|
|
/* set bit corresponding to our partid in remote partition's amo */
|
2008-07-29 22:34:09 -07:00
|
|
|
FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_OR,
|
2008-07-29 22:34:14 -07:00
|
|
|
BIT(sn_partition_id));
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
/*
|
|
|
|
* We must always use the nofault function regardless of whether we
|
|
|
|
* are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we
|
|
|
|
* didn't, we'd never know that the other partition is down and would
|
2008-07-29 22:34:11 -07:00
|
|
|
* keep sending IRQs and amos to it until the heartbeat times out.
|
2008-07-29 22:34:09 -07:00
|
|
|
*/
|
|
|
|
(void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo->
|
|
|
|
variable),
|
|
|
|
xp_nofault_PIOR_target));
|
|
|
|
|
|
|
|
local_irq_restore(irq_flags);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Send activate IRQ to get other side to see that we've set our
|
2008-07-29 22:34:11 -07:00
|
|
|
* bit in their deactivate request amo.
|
2008-07-29 22:34:09 -07:00
|
|
|
*/
|
2008-07-29 22:34:10 -07:00
|
|
|
xpc_send_activate_IRQ_sn2(part_sn2->remote_amos_page_pa,
|
2008-07-29 22:34:09 -07:00
|
|
|
cnodeid_to_nasid(0),
|
|
|
|
part_sn2->activate_IRQ_nasid,
|
|
|
|
part_sn2->activate_IRQ_phys_cpuid);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
xpc_cancel_partition_deactivation_request_sn2(struct xpc_partition *part)
|
|
|
|
{
|
|
|
|
unsigned long irq_flags;
|
2008-07-29 22:34:11 -07:00
|
|
|
struct amo *amo = (struct amo *)__va(part->sn.sn2.remote_amos_page_pa +
|
2008-07-29 22:34:13 -07:00
|
|
|
(XPC_DEACTIVATE_REQUEST_AMO_SN2 *
|
2008-07-29 22:34:11 -07:00
|
|
|
sizeof(struct amo)));
|
2008-07-29 22:34:09 -07:00
|
|
|
|
|
|
|
local_irq_save(irq_flags);
|
|
|
|
|
2008-07-29 22:34:11 -07:00
|
|
|
/* clear bit corresponding to our partid in remote partition's amo */
|
2008-07-29 22:34:09 -07:00
|
|
|
FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND,
|
2008-07-29 22:34:14 -07:00
|
|
|
~BIT(sn_partition_id));
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
/*
|
|
|
|
* We must always use the nofault function regardless of whether we
|
|
|
|
* are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we
|
|
|
|
* didn't, we'd never know that the other partition is down and would
|
2008-07-29 22:34:11 -07:00
|
|
|
* keep sending IRQs and amos to it until the heartbeat times out.
|
2008-07-29 22:34:09 -07:00
|
|
|
*/
|
|
|
|
(void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo->
|
|
|
|
variable),
|
|
|
|
xp_nofault_PIOR_target));
|
|
|
|
|
|
|
|
local_irq_restore(irq_flags);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
xpc_partition_deactivation_requested_sn2(short partid)
|
|
|
|
{
|
2008-07-29 22:34:13 -07:00
|
|
|
struct amo *amo = xpc_vars_sn2->amos_page +
|
|
|
|
XPC_DEACTIVATE_REQUEST_AMO_SN2;
|
2008-07-29 22:34:09 -07:00
|
|
|
|
2008-07-29 22:34:11 -07:00
|
|
|
/* our partition's amo variable ANDed with partid mask */
|
2008-07-29 22:34:09 -07:00
|
|
|
return (FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_LOAD) &
|
2008-07-29 22:34:14 -07:00
|
|
|
BIT(partid)) != 0;
|
2008-07-29 22:34:07 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Update the remote partition's info.
|
|
|
|
*/
|
|
|
|
static void
|
|
|
|
xpc_update_partition_info_sn2(struct xpc_partition *part, u8 remote_rp_version,
|
2008-07-29 22:34:15 -07:00
|
|
|
unsigned long *remote_rp_ts_jiffies,
|
2008-07-29 22:34:16 -07:00
|
|
|
unsigned long remote_rp_pa,
|
|
|
|
unsigned long remote_vars_pa,
|
2008-07-29 22:34:07 -07:00
|
|
|
struct xpc_vars_sn2 *remote_vars)
|
|
|
|
{
|
2008-07-29 22:34:09 -07:00
|
|
|
struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
|
|
|
|
|
2008-07-29 22:34:07 -07:00
|
|
|
part->remote_rp_version = remote_rp_version;
|
|
|
|
dev_dbg(xpc_part, " remote_rp_version = 0x%016x\n",
|
|
|
|
part->remote_rp_version);
|
|
|
|
|
2008-07-29 22:34:15 -07:00
|
|
|
part->remote_rp_ts_jiffies = *remote_rp_ts_jiffies;
|
|
|
|
dev_dbg(xpc_part, " remote_rp_ts_jiffies = 0x%016lx\n",
|
|
|
|
part->remote_rp_ts_jiffies);
|
2008-07-29 22:34:07 -07:00
|
|
|
|
|
|
|
part->remote_rp_pa = remote_rp_pa;
|
|
|
|
dev_dbg(xpc_part, " remote_rp_pa = 0x%016lx\n", part->remote_rp_pa);
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
part_sn2->remote_vars_pa = remote_vars_pa;
|
2008-07-29 22:34:07 -07:00
|
|
|
dev_dbg(xpc_part, " remote_vars_pa = 0x%016lx\n",
|
2008-07-29 22:34:09 -07:00
|
|
|
part_sn2->remote_vars_pa);
|
2008-07-29 22:34:07 -07:00
|
|
|
|
2009-01-15 14:50:57 -07:00
|
|
|
part->last_heartbeat = remote_vars->heartbeat - 1;
|
2008-07-29 22:34:07 -07:00
|
|
|
dev_dbg(xpc_part, " last_heartbeat = 0x%016lx\n",
|
|
|
|
part->last_heartbeat);
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
part_sn2->remote_vars_part_pa = remote_vars->vars_part_pa;
|
2008-07-29 22:34:07 -07:00
|
|
|
dev_dbg(xpc_part, " remote_vars_part_pa = 0x%016lx\n",
|
2008-07-29 22:34:09 -07:00
|
|
|
part_sn2->remote_vars_part_pa);
|
2008-07-29 22:34:07 -07:00
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
part_sn2->activate_IRQ_nasid = remote_vars->activate_IRQ_nasid;
|
|
|
|
dev_dbg(xpc_part, " activate_IRQ_nasid = 0x%x\n",
|
|
|
|
part_sn2->activate_IRQ_nasid);
|
2008-07-29 22:34:07 -07:00
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
part_sn2->activate_IRQ_phys_cpuid =
|
|
|
|
remote_vars->activate_IRQ_phys_cpuid;
|
|
|
|
dev_dbg(xpc_part, " activate_IRQ_phys_cpuid = 0x%x\n",
|
|
|
|
part_sn2->activate_IRQ_phys_cpuid);
|
2008-07-29 22:34:07 -07:00
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
part_sn2->remote_amos_page_pa = remote_vars->amos_page_pa;
|
2008-07-29 22:34:07 -07:00
|
|
|
dev_dbg(xpc_part, " remote_amos_page_pa = 0x%lx\n",
|
2008-07-29 22:34:09 -07:00
|
|
|
part_sn2->remote_amos_page_pa);
|
2008-07-29 22:34:07 -07:00
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
part_sn2->remote_vars_version = remote_vars->version;
|
2008-07-29 22:34:07 -07:00
|
|
|
dev_dbg(xpc_part, " remote_vars_version = 0x%x\n",
|
2008-07-29 22:34:09 -07:00
|
|
|
part_sn2->remote_vars_version);
|
2008-07-29 22:34:07 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2008-07-29 22:34:10 -07:00
|
|
|
* Prior code has determined the nasid which generated a activate IRQ.
|
|
|
|
* Inspect that nasid to determine if its partition needs to be activated
|
|
|
|
* or deactivated.
|
2008-07-29 22:34:07 -07:00
|
|
|
*
|
2008-07-29 22:34:10 -07:00
|
|
|
* A partition is considered "awaiting activation" if our partition
|
2008-07-29 22:34:07 -07:00
|
|
|
* 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
|
2008-07-29 22:34:09 -07:00
|
|
|
xpc_identify_activate_IRQ_req_sn2(int nasid)
|
2008-07-29 22:34:07 -07:00
|
|
|
{
|
|
|
|
struct xpc_rsvd_page *remote_rp;
|
|
|
|
struct xpc_vars_sn2 *remote_vars;
|
2008-07-29 22:34:16 -07:00
|
|
|
unsigned long remote_rp_pa;
|
|
|
|
unsigned long remote_vars_pa;
|
2008-07-29 22:34:07 -07:00
|
|
|
int remote_rp_version;
|
|
|
|
int reactivate = 0;
|
2008-07-29 22:34:15 -07:00
|
|
|
unsigned long remote_rp_ts_jiffies = 0;
|
2008-07-29 22:34:07 -07:00
|
|
|
short partid;
|
|
|
|
struct xpc_partition *part;
|
2008-07-29 22:34:09 -07:00
|
|
|
struct xpc_partition_sn2 *part_sn2;
|
2008-07-29 22:34:07 -07:00
|
|
|
enum xp_retval ret;
|
|
|
|
|
|
|
|
/* pull over the reserved page structure */
|
|
|
|
|
2008-07-29 22:34:13 -07:00
|
|
|
remote_rp = (struct xpc_rsvd_page *)xpc_remote_copy_buffer_sn2;
|
2008-07-29 22:34:07 -07:00
|
|
|
|
|
|
|
ret = xpc_get_remote_rp(nasid, NULL, remote_rp, &remote_rp_pa);
|
|
|
|
if (ret != xpSuccess) {
|
|
|
|
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->sn.vars_pa;
|
|
|
|
remote_rp_version = remote_rp->version;
|
2008-07-29 22:34:15 -07:00
|
|
|
remote_rp_ts_jiffies = remote_rp->ts_jiffies;
|
2008-07-29 22:34:07 -07:00
|
|
|
|
|
|
|
partid = remote_rp->SAL_partid;
|
|
|
|
part = &xpc_partitions[partid];
|
2008-07-29 22:34:09 -07:00
|
|
|
part_sn2 = &part->sn.sn2;
|
2008-07-29 22:34:07 -07:00
|
|
|
|
|
|
|
/* pull over the cross partition variables */
|
|
|
|
|
2008-07-29 22:34:13 -07:00
|
|
|
remote_vars = (struct xpc_vars_sn2 *)xpc_remote_copy_buffer_sn2;
|
2008-07-29 22:34:07 -07:00
|
|
|
|
|
|
|
ret = xpc_get_remote_vars_sn2(remote_vars_pa, remote_vars);
|
|
|
|
if (ret != xpSuccess) {
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
part->activate_IRQ_rcvd++;
|
2008-07-29 22:34:07 -07:00
|
|
|
|
|
|
|
dev_dbg(xpc_part, "partid for nasid %d is %d; IRQs = %d; HB = "
|
2008-07-29 22:34:09 -07:00
|
|
|
"%ld:0x%lx\n", (int)nasid, (int)partid, part->activate_IRQ_rcvd,
|
2008-07-29 22:34:07 -07:00
|
|
|
remote_vars->heartbeat, remote_vars->heartbeating_to_mask[0]);
|
|
|
|
|
|
|
|
if (xpc_partition_disengaged(part) &&
|
2008-07-29 22:34:18 -07:00
|
|
|
part->act_state == XPC_P_AS_INACTIVE) {
|
2008-07-29 22:34:07 -07:00
|
|
|
|
|
|
|
xpc_update_partition_info_sn2(part, remote_rp_version,
|
2008-07-29 22:34:15 -07:00
|
|
|
&remote_rp_ts_jiffies,
|
|
|
|
remote_rp_pa, remote_vars_pa,
|
|
|
|
remote_vars);
|
2008-07-29 22:34:07 -07:00
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
if (xpc_partition_deactivation_requested_sn2(partid)) {
|
|
|
|
/*
|
|
|
|
* Other side is waiting on us to deactivate even though
|
|
|
|
* we already have.
|
|
|
|
*/
|
|
|
|
return;
|
2008-07-29 22:34:07 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
xpc_activate_partition(part);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
DBUG_ON(part->remote_rp_version == 0);
|
2008-07-29 22:34:09 -07:00
|
|
|
DBUG_ON(part_sn2->remote_vars_version == 0);
|
2008-07-29 22:34:07 -07:00
|
|
|
|
2008-07-29 22:34:15 -07:00
|
|
|
if (remote_rp_ts_jiffies != part->remote_rp_ts_jiffies) {
|
2008-07-29 22:34:07 -07:00
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
/* the other side rebooted */
|
2008-07-29 22:34:07 -07:00
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
DBUG_ON(xpc_partition_engaged_sn2(partid));
|
|
|
|
DBUG_ON(xpc_partition_deactivation_requested_sn2(partid));
|
2008-07-29 22:34:07 -07:00
|
|
|
|
|
|
|
xpc_update_partition_info_sn2(part, remote_rp_version,
|
2008-07-29 22:34:15 -07:00
|
|
|
&remote_rp_ts_jiffies,
|
|
|
|
remote_rp_pa, remote_vars_pa,
|
|
|
|
remote_vars);
|
2008-07-29 22:34:07 -07:00
|
|
|
reactivate = 1;
|
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
if (part->disengage_timeout > 0 && !xpc_partition_disengaged(part)) {
|
2008-07-29 22:34:07 -07:00
|
|
|
/* still waiting on other side to disengage from us */
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
if (reactivate)
|
2008-07-29 22:34:07 -07:00
|
|
|
XPC_DEACTIVATE_PARTITION(part, xpReactivating);
|
2008-07-29 22:34:09 -07:00
|
|
|
else if (xpc_partition_deactivation_requested_sn2(partid))
|
2008-07-29 22:34:07 -07:00
|
|
|
XPC_DEACTIVATE_PARTITION(part, xpOtherGoingDown);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2008-07-29 22:34:11 -07:00
|
|
|
* Loop through the activation amo variables and process any bits
|
2008-07-29 22:34:07 -07:00
|
|
|
* which are set. Each bit indicates a nasid sending a partition
|
|
|
|
* activation or deactivation request.
|
|
|
|
*
|
|
|
|
* Return #of IRQs detected.
|
|
|
|
*/
|
|
|
|
int
|
2008-07-29 22:34:09 -07:00
|
|
|
xpc_identify_activate_IRQ_sender_sn2(void)
|
2008-07-29 22:34:07 -07:00
|
|
|
{
|
2008-07-29 22:34:14 -07:00
|
|
|
int l;
|
|
|
|
int b;
|
|
|
|
unsigned long nasid_mask_long;
|
2008-07-29 22:34:07 -07:00
|
|
|
u64 nasid; /* remote nasid */
|
|
|
|
int n_IRQs_detected = 0;
|
2008-07-29 22:34:11 -07:00
|
|
|
struct amo *act_amos;
|
2008-07-29 22:34:07 -07:00
|
|
|
|
2008-07-29 22:34:13 -07:00
|
|
|
act_amos = xpc_vars_sn2->amos_page + XPC_ACTIVATE_IRQ_AMOS_SN2;
|
2008-07-29 22:34:07 -07:00
|
|
|
|
2008-07-29 22:34:14 -07:00
|
|
|
/* scan through activate amo variables looking for non-zero entries */
|
|
|
|
for (l = 0; l < xpc_nasid_mask_nlongs; l++) {
|
2008-07-29 22:34:07 -07:00
|
|
|
|
|
|
|
if (xpc_exiting)
|
|
|
|
break;
|
|
|
|
|
2008-07-29 22:34:14 -07:00
|
|
|
nasid_mask_long = xpc_receive_IRQ_amo_sn2(&act_amos[l]);
|
|
|
|
|
|
|
|
b = find_first_bit(&nasid_mask_long, BITS_PER_LONG);
|
|
|
|
if (b >= BITS_PER_LONG) {
|
|
|
|
/* no IRQs from nasids in this amo variable */
|
2008-07-29 22:34:07 -07:00
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:14 -07:00
|
|
|
dev_dbg(xpc_part, "amo[%d] gave back 0x%lx\n", l,
|
|
|
|
nasid_mask_long);
|
2008-07-29 22:34:07 -07:00
|
|
|
|
|
|
|
/*
|
|
|
|
* 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.
|
|
|
|
*/
|
2008-07-29 22:34:14 -07:00
|
|
|
xpc_mach_nasids[l] |= nasid_mask_long;
|
2008-07-29 22:34:07 -07:00
|
|
|
|
|
|
|
/* locate the nasid(s) which sent interrupts */
|
|
|
|
|
2008-07-29 22:34:14 -07:00
|
|
|
do {
|
|
|
|
n_IRQs_detected++;
|
|
|
|
nasid = (l * BITS_PER_LONG + b) * 2;
|
|
|
|
dev_dbg(xpc_part, "interrupt from nasid %ld\n", nasid);
|
|
|
|
xpc_identify_activate_IRQ_req_sn2(nasid);
|
|
|
|
|
|
|
|
b = find_next_bit(&nasid_mask_long, BITS_PER_LONG,
|
|
|
|
b + 1);
|
|
|
|
} while (b < BITS_PER_LONG);
|
2008-07-29 22:34:07 -07:00
|
|
|
}
|
|
|
|
return n_IRQs_detected;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
2008-07-29 22:34:18 -07:00
|
|
|
xpc_process_activate_IRQ_rcvd_sn2(void)
|
2008-07-29 22:34:07 -07:00
|
|
|
{
|
2008-07-29 22:34:18 -07:00
|
|
|
unsigned long irq_flags;
|
|
|
|
int n_IRQs_expected;
|
2008-07-29 22:34:07 -07:00
|
|
|
int n_IRQs_detected;
|
|
|
|
|
2008-07-29 22:34:18 -07:00
|
|
|
spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
|
|
|
|
n_IRQs_expected = xpc_activate_IRQ_rcvd;
|
|
|
|
xpc_activate_IRQ_rcvd = 0;
|
|
|
|
spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
n_IRQs_detected = xpc_identify_activate_IRQ_sender_sn2();
|
2008-07-29 22:34:07 -07:00
|
|
|
if (n_IRQs_detected < n_IRQs_expected) {
|
2008-07-29 22:34:11 -07:00
|
|
|
/* retry once to help avoid missing amo */
|
2008-07-29 22:34:09 -07:00
|
|
|
(void)xpc_identify_activate_IRQ_sender_sn2();
|
2008-07-29 22:34:07 -07:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:11 -07:00
|
|
|
/*
|
2008-07-29 22:34:18 -07:00
|
|
|
* Setup the channel structures that are sn2 specific.
|
2008-07-29 22:34:06 -07:00
|
|
|
*/
|
|
|
|
static enum xp_retval
|
2008-07-29 22:34:18 -07:00
|
|
|
xpc_setup_ch_structures_sn_sn2(struct xpc_partition *part)
|
2008-07-29 22:34:06 -07:00
|
|
|
{
|
2008-07-29 22:34:09 -07:00
|
|
|
struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
|
2008-07-29 22:34:18 -07:00
|
|
|
struct xpc_channel_sn2 *ch_sn2;
|
2008-07-29 22:34:06 -07:00
|
|
|
enum xp_retval retval;
|
|
|
|
int ret;
|
|
|
|
int cpuid;
|
|
|
|
int ch_number;
|
|
|
|
struct timer_list *timer;
|
|
|
|
short partid = XPC_PARTID(part);
|
|
|
|
|
|
|
|
/* allocate all the required GET/PUT values */
|
|
|
|
|
2008-07-29 22:34:11 -07:00
|
|
|
part_sn2->local_GPs =
|
2008-07-29 22:34:18 -07:00
|
|
|
xpc_kzalloc_cacheline_aligned(XPC_GP_SIZE, GFP_KERNEL,
|
|
|
|
&part_sn2->local_GPs_base);
|
2008-07-29 22:34:09 -07:00
|
|
|
if (part_sn2->local_GPs == NULL) {
|
2008-07-29 22:34:06 -07:00
|
|
|
dev_err(xpc_chan, "can't get memory for local get/put "
|
|
|
|
"values\n");
|
2008-07-29 22:34:18 -07:00
|
|
|
return xpNoMemory;
|
2008-07-29 22:34:06 -07:00
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:11 -07:00
|
|
|
part_sn2->remote_GPs =
|
2008-07-29 22:34:18 -07:00
|
|
|
xpc_kzalloc_cacheline_aligned(XPC_GP_SIZE, GFP_KERNEL,
|
|
|
|
&part_sn2->remote_GPs_base);
|
2008-07-29 22:34:09 -07:00
|
|
|
if (part_sn2->remote_GPs == NULL) {
|
2008-07-29 22:34:06 -07:00
|
|
|
dev_err(xpc_chan, "can't get memory for remote get/put "
|
|
|
|
"values\n");
|
|
|
|
retval = xpNoMemory;
|
2008-07-29 22:34:18 -07:00
|
|
|
goto out_1;
|
2008-07-29 22:34:06 -07:00
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
part_sn2->remote_GPs_pa = 0;
|
2008-07-29 22:34:06 -07:00
|
|
|
|
|
|
|
/* allocate all the required open and close args */
|
|
|
|
|
2008-07-29 22:34:18 -07:00
|
|
|
part_sn2->local_openclose_args =
|
|
|
|
xpc_kzalloc_cacheline_aligned(XPC_OPENCLOSE_ARGS_SIZE,
|
|
|
|
GFP_KERNEL, &part_sn2->
|
|
|
|
local_openclose_args_base);
|
|
|
|
if (part_sn2->local_openclose_args == NULL) {
|
2008-07-29 22:34:06 -07:00
|
|
|
dev_err(xpc_chan, "can't get memory for local connect args\n");
|
|
|
|
retval = xpNoMemory;
|
2008-07-29 22:34:18 -07:00
|
|
|
goto out_2;
|
2008-07-29 22:34:06 -07:00
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
part_sn2->remote_openclose_args_pa = 0;
|
2008-07-29 22:34:06 -07:00
|
|
|
|
2008-07-29 22:34:10 -07:00
|
|
|
part_sn2->local_chctl_amo_va = xpc_init_IRQ_amo_sn2(partid);
|
2008-07-29 22:34:06 -07:00
|
|
|
|
2008-07-29 22:34:10 -07:00
|
|
|
part_sn2->notify_IRQ_nasid = 0;
|
|
|
|
part_sn2->notify_IRQ_phys_cpuid = 0;
|
|
|
|
part_sn2->remote_chctl_amo_va = NULL;
|
2008-07-29 22:34:06 -07:00
|
|
|
|
2008-07-29 22:34:10 -07:00
|
|
|
sprintf(part_sn2->notify_IRQ_owner, "xpc%02d", partid);
|
2008-07-29 22:34:09 -07:00
|
|
|
ret = request_irq(SGI_XPC_NOTIFY, xpc_handle_notify_IRQ_sn2,
|
2008-07-29 22:34:10 -07:00
|
|
|
IRQF_SHARED, part_sn2->notify_IRQ_owner,
|
2008-07-29 22:34:09 -07:00
|
|
|
(void *)(u64)partid);
|
2008-07-29 22:34:06 -07:00
|
|
|
if (ret != 0) {
|
|
|
|
dev_err(xpc_chan, "can't register NOTIFY IRQ handler, "
|
|
|
|
"errno=%d\n", -ret);
|
|
|
|
retval = xpLackOfResources;
|
2008-07-29 22:34:18 -07:00
|
|
|
goto out_3;
|
2008-07-29 22:34:06 -07:00
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:10 -07:00
|
|
|
/* Setup a timer to check for dropped notify IRQs */
|
2008-07-29 22:34:09 -07:00
|
|
|
timer = &part_sn2->dropped_notify_IRQ_timer;
|
2008-07-29 22:34:06 -07:00
|
|
|
init_timer(timer);
|
2008-07-29 22:34:09 -07:00
|
|
|
timer->function =
|
2008-07-29 22:34:10 -07:00
|
|
|
(void (*)(unsigned long))xpc_check_for_dropped_notify_IRQ_sn2;
|
2008-07-29 22:34:06 -07:00
|
|
|
timer->data = (unsigned long)part;
|
2008-07-29 22:34:10 -07:00
|
|
|
timer->expires = jiffies + XPC_DROPPED_NOTIFY_IRQ_WAIT_INTERVAL;
|
2008-07-29 22:34:06 -07:00
|
|
|
add_timer(timer);
|
|
|
|
|
|
|
|
for (ch_number = 0; ch_number < part->nchannels; ch_number++) {
|
2008-07-29 22:34:18 -07:00
|
|
|
ch_sn2 = &part->channels[ch_number].sn.sn2;
|
2008-07-29 22:34:06 -07:00
|
|
|
|
2008-07-29 22:34:18 -07:00
|
|
|
ch_sn2->local_GP = &part_sn2->local_GPs[ch_number];
|
|
|
|
ch_sn2->local_openclose_args =
|
|
|
|
&part_sn2->local_openclose_args[ch_number];
|
2008-07-29 22:34:06 -07:00
|
|
|
|
2008-07-29 22:34:18 -07:00
|
|
|
mutex_init(&ch_sn2->msg_to_pull_mutex);
|
2008-07-29 22:34:06 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Setup the per partition specific variables required by the
|
|
|
|
* remote partition to establish channel connections with us.
|
|
|
|
*
|
|
|
|
* The setting of the magic # indicates that these per partition
|
|
|
|
* specific variables are ready to be used.
|
|
|
|
*/
|
2008-07-29 22:34:16 -07:00
|
|
|
xpc_vars_part_sn2[partid].GPs_pa = xp_pa(part_sn2->local_GPs);
|
2008-07-29 22:34:13 -07:00
|
|
|
xpc_vars_part_sn2[partid].openclose_args_pa =
|
2008-07-29 22:34:18 -07:00
|
|
|
xp_pa(part_sn2->local_openclose_args);
|
2008-07-29 22:34:13 -07:00
|
|
|
xpc_vars_part_sn2[partid].chctl_amo_pa =
|
2008-07-29 22:34:16 -07:00
|
|
|
xp_pa(part_sn2->local_chctl_amo_va);
|
2008-07-29 22:34:06 -07:00
|
|
|
cpuid = raw_smp_processor_id(); /* any CPU in this partition will do */
|
2008-07-29 22:34:13 -07:00
|
|
|
xpc_vars_part_sn2[partid].notify_IRQ_nasid = cpuid_to_nasid(cpuid);
|
|
|
|
xpc_vars_part_sn2[partid].notify_IRQ_phys_cpuid =
|
|
|
|
cpu_physical_id(cpuid);
|
|
|
|
xpc_vars_part_sn2[partid].nchannels = part->nchannels;
|
2008-07-29 22:34:18 -07:00
|
|
|
xpc_vars_part_sn2[partid].magic = XPC_VP_MAGIC1_SN2;
|
2008-07-29 22:34:06 -07:00
|
|
|
|
|
|
|
return xpSuccess;
|
|
|
|
|
2008-07-29 22:34:18 -07:00
|
|
|
/* setup of ch structures failed */
|
2008-07-29 22:34:06 -07:00
|
|
|
out_3:
|
2008-07-29 22:34:18 -07:00
|
|
|
kfree(part_sn2->local_openclose_args_base);
|
|
|
|
part_sn2->local_openclose_args = NULL;
|
|
|
|
out_2:
|
2008-07-29 22:34:09 -07:00
|
|
|
kfree(part_sn2->remote_GPs_base);
|
|
|
|
part_sn2->remote_GPs = NULL;
|
2008-07-29 22:34:18 -07:00
|
|
|
out_1:
|
2008-07-29 22:34:09 -07:00
|
|
|
kfree(part_sn2->local_GPs_base);
|
|
|
|
part_sn2->local_GPs = NULL;
|
2008-07-29 22:34:06 -07:00
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2008-07-29 22:34:18 -07:00
|
|
|
* Teardown the channel structures that are sn2 specific.
|
2008-07-29 22:34:06 -07:00
|
|
|
*/
|
|
|
|
static void
|
2008-07-29 22:34:18 -07:00
|
|
|
xpc_teardown_ch_structures_sn_sn2(struct xpc_partition *part)
|
2008-07-29 22:34:06 -07:00
|
|
|
{
|
2008-07-29 22:34:09 -07:00
|
|
|
struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
|
2008-07-29 22:34:06 -07:00
|
|
|
short partid = XPC_PARTID(part);
|
|
|
|
|
|
|
|
/*
|
2008-07-29 22:34:18 -07:00
|
|
|
* Indicate that the variables specific to the remote partition are no
|
|
|
|
* longer available for its use.
|
2008-07-29 22:34:06 -07:00
|
|
|
*/
|
2008-07-29 22:34:13 -07:00
|
|
|
xpc_vars_part_sn2[partid].magic = 0;
|
2008-07-29 22:34:06 -07:00
|
|
|
|
|
|
|
/* in case we've still got outstanding timers registered... */
|
2008-07-29 22:34:09 -07:00
|
|
|
del_timer_sync(&part_sn2->dropped_notify_IRQ_timer);
|
2008-07-29 22:34:18 -07:00
|
|
|
free_irq(SGI_XPC_NOTIFY, (void *)(u64)partid);
|
2008-07-29 22:34:06 -07:00
|
|
|
|
2008-07-29 22:34:18 -07:00
|
|
|
kfree(part_sn2->local_openclose_args_base);
|
|
|
|
part_sn2->local_openclose_args = NULL;
|
2008-07-29 22:34:09 -07:00
|
|
|
kfree(part_sn2->remote_GPs_base);
|
|
|
|
part_sn2->remote_GPs = NULL;
|
|
|
|
kfree(part_sn2->local_GPs_base);
|
|
|
|
part_sn2->local_GPs = NULL;
|
2008-07-29 22:34:10 -07:00
|
|
|
part_sn2->local_chctl_amo_va = NULL;
|
2008-07-29 22:34:06 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Create a wrapper that hides the underlying mechanism for pulling a cacheline
|
|
|
|
* (or multiple cachelines) from a remote partition.
|
|
|
|
*
|
2008-07-29 22:34:16 -07:00
|
|
|
* src_pa must be a cacheline aligned physical address on the remote partition.
|
2008-07-29 22:34:06 -07:00
|
|
|
* dst must be a cacheline aligned virtual address on this partition.
|
|
|
|
* cnt must be cacheline sized
|
|
|
|
*/
|
2008-07-29 22:34:14 -07:00
|
|
|
/* ??? Replace this function by call to xp_remote_memcpy() or bte_copy()? */
|
2008-07-29 22:34:06 -07:00
|
|
|
static enum xp_retval
|
|
|
|
xpc_pull_remote_cachelines_sn2(struct xpc_partition *part, void *dst,
|
2008-07-29 22:34:16 -07:00
|
|
|
const unsigned long src_pa, size_t cnt)
|
2008-07-29 22:34:06 -07:00
|
|
|
{
|
|
|
|
enum xp_retval ret;
|
|
|
|
|
2008-07-29 22:34:16 -07:00
|
|
|
DBUG_ON(src_pa != L1_CACHE_ALIGN(src_pa));
|
|
|
|
DBUG_ON((unsigned long)dst != L1_CACHE_ALIGN((unsigned long)dst));
|
2008-07-29 22:34:06 -07:00
|
|
|
DBUG_ON(cnt != L1_CACHE_ALIGN(cnt));
|
|
|
|
|
2008-07-29 22:34:18 -07:00
|
|
|
if (part->act_state == XPC_P_AS_DEACTIVATING)
|
2008-07-29 22:34:06 -07:00
|
|
|
return part->reason;
|
|
|
|
|
2008-07-29 22:34:16 -07:00
|
|
|
ret = xp_remote_memcpy(xp_pa(dst), src_pa, cnt);
|
2008-07-29 22:34:06 -07:00
|
|
|
if (ret != xpSuccess) {
|
|
|
|
dev_dbg(xpc_chan, "xp_remote_memcpy() from partition %d failed,"
|
|
|
|
" ret=%d\n", XPC_PARTID(part), ret);
|
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Pull the remote per partition specific variables from the specified
|
|
|
|
* partition.
|
|
|
|
*/
|
|
|
|
static enum xp_retval
|
|
|
|
xpc_pull_remote_vars_part_sn2(struct xpc_partition *part)
|
|
|
|
{
|
2008-07-29 22:34:09 -07:00
|
|
|
struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
|
2008-07-29 22:34:06 -07:00
|
|
|
u8 buffer[L1_CACHE_BYTES * 2];
|
|
|
|
struct xpc_vars_part_sn2 *pulled_entry_cacheline =
|
|
|
|
(struct xpc_vars_part_sn2 *)L1_CACHE_ALIGN((u64)buffer);
|
|
|
|
struct xpc_vars_part_sn2 *pulled_entry;
|
2008-07-29 22:34:16 -07:00
|
|
|
unsigned long remote_entry_cacheline_pa;
|
|
|
|
unsigned long remote_entry_pa;
|
2008-07-29 22:34:06 -07:00
|
|
|
short partid = XPC_PARTID(part);
|
|
|
|
enum xp_retval ret;
|
|
|
|
|
|
|
|
/* pull the cacheline that contains the variables we're interested in */
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
DBUG_ON(part_sn2->remote_vars_part_pa !=
|
|
|
|
L1_CACHE_ALIGN(part_sn2->remote_vars_part_pa));
|
2008-07-29 22:34:06 -07:00
|
|
|
DBUG_ON(sizeof(struct xpc_vars_part_sn2) != L1_CACHE_BYTES / 2);
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
remote_entry_pa = part_sn2->remote_vars_part_pa +
|
2008-07-29 22:34:06 -07:00
|
|
|
sn_partition_id * sizeof(struct xpc_vars_part_sn2);
|
|
|
|
|
|
|
|
remote_entry_cacheline_pa = (remote_entry_pa & ~(L1_CACHE_BYTES - 1));
|
|
|
|
|
|
|
|
pulled_entry = (struct xpc_vars_part_sn2 *)((u64)pulled_entry_cacheline
|
|
|
|
+ (remote_entry_pa &
|
|
|
|
(L1_CACHE_BYTES - 1)));
|
|
|
|
|
|
|
|
ret = xpc_pull_remote_cachelines_sn2(part, pulled_entry_cacheline,
|
2008-07-29 22:34:16 -07:00
|
|
|
remote_entry_cacheline_pa,
|
2008-07-29 22:34:06 -07:00
|
|
|
L1_CACHE_BYTES);
|
|
|
|
if (ret != xpSuccess) {
|
|
|
|
dev_dbg(xpc_chan, "failed to pull XPC vars_part from "
|
|
|
|
"partition %d, ret=%d\n", partid, ret);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* see if they've been set up yet */
|
|
|
|
|
2008-07-29 22:34:18 -07:00
|
|
|
if (pulled_entry->magic != XPC_VP_MAGIC1_SN2 &&
|
|
|
|
pulled_entry->magic != XPC_VP_MAGIC2_SN2) {
|
2008-07-29 22:34:06 -07:00
|
|
|
|
|
|
|
if (pulled_entry->magic != 0) {
|
|
|
|
dev_dbg(xpc_chan, "partition %d's XPC vars_part for "
|
|
|
|
"partition %d has bad magic value (=0x%lx)\n",
|
|
|
|
partid, sn_partition_id, pulled_entry->magic);
|
|
|
|
return xpBadMagic;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* they've not been initialized yet */
|
|
|
|
return xpRetry;
|
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:18 -07:00
|
|
|
if (xpc_vars_part_sn2[partid].magic == XPC_VP_MAGIC1_SN2) {
|
2008-07-29 22:34:06 -07:00
|
|
|
|
|
|
|
/* validate the variables */
|
|
|
|
|
|
|
|
if (pulled_entry->GPs_pa == 0 ||
|
|
|
|
pulled_entry->openclose_args_pa == 0 ||
|
2008-07-29 22:34:10 -07:00
|
|
|
pulled_entry->chctl_amo_pa == 0) {
|
2008-07-29 22:34:06 -07:00
|
|
|
|
|
|
|
dev_err(xpc_chan, "partition %d's XPC vars_part for "
|
|
|
|
"partition %d are not valid\n", partid,
|
|
|
|
sn_partition_id);
|
|
|
|
return xpInvalidAddress;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* the variables we imported look to be valid */
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
part_sn2->remote_GPs_pa = pulled_entry->GPs_pa;
|
|
|
|
part_sn2->remote_openclose_args_pa =
|
2008-07-29 22:34:06 -07:00
|
|
|
pulled_entry->openclose_args_pa;
|
2008-07-29 22:34:10 -07:00
|
|
|
part_sn2->remote_chctl_amo_va =
|
2008-07-29 22:34:11 -07:00
|
|
|
(struct amo *)__va(pulled_entry->chctl_amo_pa);
|
2008-07-29 22:34:10 -07:00
|
|
|
part_sn2->notify_IRQ_nasid = pulled_entry->notify_IRQ_nasid;
|
|
|
|
part_sn2->notify_IRQ_phys_cpuid =
|
|
|
|
pulled_entry->notify_IRQ_phys_cpuid;
|
2008-07-29 22:34:06 -07:00
|
|
|
|
|
|
|
if (part->nchannels > pulled_entry->nchannels)
|
|
|
|
part->nchannels = pulled_entry->nchannels;
|
|
|
|
|
|
|
|
/* let the other side know that we've pulled their variables */
|
|
|
|
|
2008-07-29 22:34:18 -07:00
|
|
|
xpc_vars_part_sn2[partid].magic = XPC_VP_MAGIC2_SN2;
|
2008-07-29 22:34:06 -07:00
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:18 -07:00
|
|
|
if (pulled_entry->magic == XPC_VP_MAGIC1_SN2)
|
2008-07-29 22:34:06 -07:00
|
|
|
return xpRetry;
|
|
|
|
|
|
|
|
return xpSuccess;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Establish first contact with the remote partititon. This involves pulling
|
|
|
|
* the XPC per partition variables from the remote partition and waiting for
|
|
|
|
* the remote partition to pull ours.
|
|
|
|
*/
|
|
|
|
static enum xp_retval
|
|
|
|
xpc_make_first_contact_sn2(struct xpc_partition *part)
|
|
|
|
{
|
2008-07-29 22:34:09 -07:00
|
|
|
struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
|
2008-07-29 22:34:06 -07:00
|
|
|
enum xp_retval ret;
|
|
|
|
|
2008-07-29 22:34:07 -07:00
|
|
|
/*
|
2008-07-29 22:34:11 -07:00
|
|
|
* Register the remote partition's amos with SAL so it can handle
|
2008-07-29 22:34:07 -07:00
|
|
|
* 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 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_amos_page_pa after module
|
|
|
|
* reloads and system reboots.
|
|
|
|
*/
|
2008-07-29 22:34:09 -07:00
|
|
|
if (sn_register_xp_addr_region(part_sn2->remote_amos_page_pa,
|
2008-07-29 22:34:07 -07:00
|
|
|
PAGE_SIZE, 1) < 0) {
|
|
|
|
dev_warn(xpc_part, "xpc_activating(%d) failed to register "
|
|
|
|
"xp_addr region\n", XPC_PARTID(part));
|
|
|
|
|
|
|
|
ret = xpPhysAddrRegFailed;
|
|
|
|
XPC_DEACTIVATE_PARTITION(part, ret);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
/*
|
|
|
|
* Send activate IRQ to get other side to activate if they've not
|
|
|
|
* already begun to do so.
|
|
|
|
*/
|
2008-07-29 22:34:10 -07:00
|
|
|
xpc_send_activate_IRQ_sn2(part_sn2->remote_amos_page_pa,
|
2008-07-29 22:34:09 -07:00
|
|
|
cnodeid_to_nasid(0),
|
|
|
|
part_sn2->activate_IRQ_nasid,
|
|
|
|
part_sn2->activate_IRQ_phys_cpuid);
|
2008-07-29 22:34:07 -07:00
|
|
|
|
2008-07-29 22:34:06 -07:00
|
|
|
while ((ret = xpc_pull_remote_vars_part_sn2(part)) != xpSuccess) {
|
|
|
|
if (ret != xpRetry) {
|
|
|
|
XPC_DEACTIVATE_PARTITION(part, ret);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
dev_dbg(xpc_part, "waiting to make first contact with "
|
|
|
|
"partition %d\n", XPC_PARTID(part));
|
|
|
|
|
|
|
|
/* wait a 1/4 of a second or so */
|
|
|
|
(void)msleep_interruptible(250);
|
|
|
|
|
2008-07-29 22:34:18 -07:00
|
|
|
if (part->act_state == XPC_P_AS_DEACTIVATING)
|
2008-07-29 22:34:06 -07:00
|
|
|
return part->reason;
|
|
|
|
}
|
|
|
|
|
|
|
|
return xpSuccess;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2008-07-29 22:34:10 -07:00
|
|
|
* Get the chctl flags and pull the openclose args and/or remote GPs as needed.
|
2008-07-29 22:34:06 -07:00
|
|
|
*/
|
|
|
|
static u64
|
2008-07-29 22:34:10 -07:00
|
|
|
xpc_get_chctl_all_flags_sn2(struct xpc_partition *part)
|
2008-07-29 22:34:06 -07:00
|
|
|
{
|
2008-07-29 22:34:09 -07:00
|
|
|
struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
|
2008-07-29 22:34:06 -07:00
|
|
|
unsigned long irq_flags;
|
2008-07-29 22:34:10 -07:00
|
|
|
union xpc_channel_ctl_flags chctl;
|
2008-07-29 22:34:06 -07:00
|
|
|
enum xp_retval ret;
|
|
|
|
|
|
|
|
/*
|
2008-07-29 22:34:10 -07:00
|
|
|
* See if there are any chctl flags to be handled.
|
2008-07-29 22:34:06 -07:00
|
|
|
*/
|
|
|
|
|
2008-07-29 22:34:10 -07:00
|
|
|
spin_lock_irqsave(&part->chctl_lock, irq_flags);
|
|
|
|
chctl = part->chctl;
|
|
|
|
if (chctl.all_flags != 0)
|
|
|
|
part->chctl.all_flags = 0;
|
2008-07-29 22:34:06 -07:00
|
|
|
|
2008-07-29 22:34:10 -07:00
|
|
|
spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
|
2008-07-29 22:34:06 -07:00
|
|
|
|
2008-07-29 22:34:10 -07:00
|
|
|
if (xpc_any_openclose_chctl_flags_set(&chctl)) {
|
2008-07-29 22:34:09 -07:00
|
|
|
ret = xpc_pull_remote_cachelines_sn2(part, part->
|
|
|
|
remote_openclose_args,
|
2008-07-29 22:34:16 -07:00
|
|
|
part_sn2->
|
2008-07-29 22:34:06 -07:00
|
|
|
remote_openclose_args_pa,
|
|
|
|
XPC_OPENCLOSE_ARGS_SIZE);
|
|
|
|
if (ret != xpSuccess) {
|
|
|
|
XPC_DEACTIVATE_PARTITION(part, ret);
|
|
|
|
|
|
|
|
dev_dbg(xpc_chan, "failed to pull openclose args from "
|
|
|
|
"partition %d, ret=%d\n", XPC_PARTID(part),
|
|
|
|
ret);
|
|
|
|
|
2008-07-29 22:34:10 -07:00
|
|
|
/* don't bother processing chctl flags anymore */
|
|
|
|
chctl.all_flags = 0;
|
2008-07-29 22:34:06 -07:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:10 -07:00
|
|
|
if (xpc_any_msg_chctl_flags_set(&chctl)) {
|
2008-07-29 22:34:09 -07:00
|
|
|
ret = xpc_pull_remote_cachelines_sn2(part, part_sn2->remote_GPs,
|
2008-07-29 22:34:16 -07:00
|
|
|
part_sn2->remote_GPs_pa,
|
2008-07-29 22:34:06 -07:00
|
|
|
XPC_GP_SIZE);
|
|
|
|
if (ret != xpSuccess) {
|
|
|
|
XPC_DEACTIVATE_PARTITION(part, ret);
|
|
|
|
|
|
|
|
dev_dbg(xpc_chan, "failed to pull GPs from partition "
|
|
|
|
"%d, ret=%d\n", XPC_PARTID(part), ret);
|
|
|
|
|
2008-07-29 22:34:10 -07:00
|
|
|
/* don't bother processing chctl flags anymore */
|
|
|
|
chctl.all_flags = 0;
|
2008-07-29 22:34:06 -07:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:10 -07:00
|
|
|
return chctl.all_flags;
|
2008-07-29 22:34:06 -07:00
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:11 -07:00
|
|
|
/*
|
|
|
|
* Allocate the local message queue and the notify queue.
|
|
|
|
*/
|
|
|
|
static enum xp_retval
|
|
|
|
xpc_allocate_local_msgqueue_sn2(struct xpc_channel *ch)
|
|
|
|
{
|
2008-07-29 22:34:18 -07:00
|
|
|
struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
|
2008-07-29 22:34:11 -07:00
|
|
|
unsigned long irq_flags;
|
|
|
|
int nentries;
|
|
|
|
size_t nbytes;
|
|
|
|
|
|
|
|
for (nentries = ch->local_nentries; nentries > 0; nentries--) {
|
|
|
|
|
2008-07-29 22:34:19 -07:00
|
|
|
nbytes = nentries * ch->entry_size;
|
2008-07-29 22:34:18 -07:00
|
|
|
ch_sn2->local_msgqueue =
|
|
|
|
xpc_kzalloc_cacheline_aligned(nbytes, GFP_KERNEL,
|
|
|
|
&ch_sn2->local_msgqueue_base);
|
|
|
|
if (ch_sn2->local_msgqueue == NULL)
|
2008-07-29 22:34:11 -07:00
|
|
|
continue;
|
|
|
|
|
2008-07-29 22:34:19 -07:00
|
|
|
nbytes = nentries * sizeof(struct xpc_notify_sn2);
|
2008-07-29 22:34:18 -07:00
|
|
|
ch_sn2->notify_queue = kzalloc(nbytes, GFP_KERNEL);
|
|
|
|
if (ch_sn2->notify_queue == NULL) {
|
|
|
|
kfree(ch_sn2->local_msgqueue_base);
|
|
|
|
ch_sn2->local_msgqueue = NULL;
|
2008-07-29 22:34:11 -07:00
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
spin_lock_irqsave(&ch->lock, irq_flags);
|
|
|
|
if (nentries < ch->local_nentries) {
|
|
|
|
dev_dbg(xpc_chan, "nentries=%d local_nentries=%d, "
|
|
|
|
"partid=%d, channel=%d\n", nentries,
|
|
|
|
ch->local_nentries, ch->partid, ch->number);
|
|
|
|
|
|
|
|
ch->local_nentries = nentries;
|
|
|
|
}
|
|
|
|
spin_unlock_irqrestore(&ch->lock, irq_flags);
|
|
|
|
return xpSuccess;
|
|
|
|
}
|
|
|
|
|
|
|
|
dev_dbg(xpc_chan, "can't get memory for local message queue and notify "
|
|
|
|
"queue, partid=%d, channel=%d\n", ch->partid, ch->number);
|
|
|
|
return xpNoMemory;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Allocate the cached remote message queue.
|
|
|
|
*/
|
|
|
|
static enum xp_retval
|
|
|
|
xpc_allocate_remote_msgqueue_sn2(struct xpc_channel *ch)
|
|
|
|
{
|
2008-07-29 22:34:18 -07:00
|
|
|
struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
|
2008-07-29 22:34:11 -07:00
|
|
|
unsigned long irq_flags;
|
|
|
|
int nentries;
|
|
|
|
size_t nbytes;
|
|
|
|
|
|
|
|
DBUG_ON(ch->remote_nentries <= 0);
|
|
|
|
|
|
|
|
for (nentries = ch->remote_nentries; nentries > 0; nentries--) {
|
|
|
|
|
2008-07-29 22:34:19 -07:00
|
|
|
nbytes = nentries * ch->entry_size;
|
2008-07-29 22:34:18 -07:00
|
|
|
ch_sn2->remote_msgqueue =
|
|
|
|
xpc_kzalloc_cacheline_aligned(nbytes, GFP_KERNEL, &ch_sn2->
|
|
|
|
remote_msgqueue_base);
|
|
|
|
if (ch_sn2->remote_msgqueue == NULL)
|
2008-07-29 22:34:11 -07:00
|
|
|
continue;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&ch->lock, irq_flags);
|
|
|
|
if (nentries < ch->remote_nentries) {
|
|
|
|
dev_dbg(xpc_chan, "nentries=%d remote_nentries=%d, "
|
|
|
|
"partid=%d, channel=%d\n", nentries,
|
|
|
|
ch->remote_nentries, ch->partid, ch->number);
|
|
|
|
|
|
|
|
ch->remote_nentries = nentries;
|
|
|
|
}
|
|
|
|
spin_unlock_irqrestore(&ch->lock, irq_flags);
|
|
|
|
return xpSuccess;
|
|
|
|
}
|
|
|
|
|
|
|
|
dev_dbg(xpc_chan, "can't get memory for cached remote message queue, "
|
|
|
|
"partid=%d, channel=%d\n", ch->partid, ch->number);
|
|
|
|
return xpNoMemory;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Allocate message queues and other stuff associated with a channel.
|
|
|
|
*
|
|
|
|
* Note: Assumes all of the channel sizes are filled in.
|
|
|
|
*/
|
|
|
|
static enum xp_retval
|
2008-07-29 22:34:18 -07:00
|
|
|
xpc_setup_msg_structures_sn2(struct xpc_channel *ch)
|
2008-07-29 22:34:11 -07:00
|
|
|
{
|
2008-07-29 22:34:18 -07:00
|
|
|
struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
|
2008-07-29 22:34:11 -07:00
|
|
|
enum xp_retval ret;
|
|
|
|
|
|
|
|
DBUG_ON(ch->flags & XPC_C_SETUP);
|
|
|
|
|
|
|
|
ret = xpc_allocate_local_msgqueue_sn2(ch);
|
|
|
|
if (ret == xpSuccess) {
|
|
|
|
|
|
|
|
ret = xpc_allocate_remote_msgqueue_sn2(ch);
|
|
|
|
if (ret != xpSuccess) {
|
2008-07-29 22:34:18 -07:00
|
|
|
kfree(ch_sn2->local_msgqueue_base);
|
|
|
|
ch_sn2->local_msgqueue = NULL;
|
|
|
|
kfree(ch_sn2->notify_queue);
|
|
|
|
ch_sn2->notify_queue = NULL;
|
2008-07-29 22:34:11 -07:00
|
|
|
}
|
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Free up message queues and other stuff that were allocated for the specified
|
|
|
|
* channel.
|
|
|
|
*/
|
|
|
|
static void
|
2008-07-29 22:34:18 -07:00
|
|
|
xpc_teardown_msg_structures_sn2(struct xpc_channel *ch)
|
2008-07-29 22:34:11 -07:00
|
|
|
{
|
|
|
|
struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
|
|
|
|
|
|
|
|
DBUG_ON(!spin_is_locked(&ch->lock));
|
|
|
|
|
2008-07-29 22:34:18 -07:00
|
|
|
ch_sn2->remote_msgqueue_pa = 0;
|
2008-07-29 22:34:11 -07:00
|
|
|
|
|
|
|
ch_sn2->local_GP->get = 0;
|
|
|
|
ch_sn2->local_GP->put = 0;
|
|
|
|
ch_sn2->remote_GP.get = 0;
|
|
|
|
ch_sn2->remote_GP.put = 0;
|
|
|
|
ch_sn2->w_local_GP.get = 0;
|
|
|
|
ch_sn2->w_local_GP.put = 0;
|
|
|
|
ch_sn2->w_remote_GP.get = 0;
|
|
|
|
ch_sn2->w_remote_GP.put = 0;
|
|
|
|
ch_sn2->next_msg_to_pull = 0;
|
|
|
|
|
|
|
|
if (ch->flags & XPC_C_SETUP) {
|
|
|
|
dev_dbg(xpc_chan, "ch->flags=0x%x, partid=%d, channel=%d\n",
|
|
|
|
ch->flags, ch->partid, ch->number);
|
|
|
|
|
2008-07-29 22:34:18 -07:00
|
|
|
kfree(ch_sn2->local_msgqueue_base);
|
|
|
|
ch_sn2->local_msgqueue = NULL;
|
|
|
|
kfree(ch_sn2->remote_msgqueue_base);
|
|
|
|
ch_sn2->remote_msgqueue = NULL;
|
|
|
|
kfree(ch_sn2->notify_queue);
|
|
|
|
ch_sn2->notify_queue = NULL;
|
2008-07-29 22:34:11 -07:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
/*
|
|
|
|
* Notify those who wanted to be notified upon delivery of their message.
|
|
|
|
*/
|
|
|
|
static void
|
|
|
|
xpc_notify_senders_sn2(struct xpc_channel *ch, enum xp_retval reason, s64 put)
|
|
|
|
{
|
2008-07-29 22:34:19 -07:00
|
|
|
struct xpc_notify_sn2 *notify;
|
2008-07-29 22:34:09 -07:00
|
|
|
u8 notify_type;
|
|
|
|
s64 get = ch->sn.sn2.w_remote_GP.get - 1;
|
|
|
|
|
|
|
|
while (++get < put && atomic_read(&ch->n_to_notify) > 0) {
|
|
|
|
|
2008-07-29 22:34:18 -07:00
|
|
|
notify = &ch->sn.sn2.notify_queue[get % ch->local_nentries];
|
2008-07-29 22:34:09 -07:00
|
|
|
|
|
|
|
/*
|
|
|
|
* See if the notify entry indicates it was associated with
|
|
|
|
* a message who's sender wants to be notified. It is possible
|
|
|
|
* that it is, but someone else is doing or has done the
|
|
|
|
* notification.
|
|
|
|
*/
|
|
|
|
notify_type = notify->type;
|
|
|
|
if (notify_type == 0 ||
|
|
|
|
cmpxchg(¬ify->type, notify_type, 0) != notify_type) {
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
DBUG_ON(notify_type != XPC_N_CALL);
|
|
|
|
|
|
|
|
atomic_dec(&ch->n_to_notify);
|
|
|
|
|
|
|
|
if (notify->func != NULL) {
|
2008-07-29 22:34:19 -07:00
|
|
|
dev_dbg(xpc_chan, "notify->func() called, notify=0x%p "
|
|
|
|
"msg_number=%ld partid=%d channel=%d\n",
|
2008-07-29 22:34:09 -07:00
|
|
|
(void *)notify, get, ch->partid, ch->number);
|
|
|
|
|
|
|
|
notify->func(reason, ch->partid, ch->number,
|
|
|
|
notify->key);
|
|
|
|
|
2008-07-29 22:34:19 -07:00
|
|
|
dev_dbg(xpc_chan, "notify->func() returned, notify=0x%p"
|
|
|
|
" msg_number=%ld partid=%d channel=%d\n",
|
|
|
|
(void *)notify, get, ch->partid, ch->number);
|
2008-07-29 22:34:09 -07:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
xpc_notify_senders_of_disconnect_sn2(struct xpc_channel *ch)
|
|
|
|
{
|
|
|
|
xpc_notify_senders_sn2(ch, ch->reason, ch->sn.sn2.w_local_GP.put);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Clear some of the msg flags in the local message queue.
|
|
|
|
*/
|
|
|
|
static inline void
|
|
|
|
xpc_clear_local_msgqueue_flags_sn2(struct xpc_channel *ch)
|
|
|
|
{
|
|
|
|
struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
|
2008-07-29 22:34:19 -07:00
|
|
|
struct xpc_msg_sn2 *msg;
|
2008-07-29 22:34:09 -07:00
|
|
|
s64 get;
|
|
|
|
|
|
|
|
get = ch_sn2->w_remote_GP.get;
|
|
|
|
do {
|
2008-07-29 22:34:19 -07:00
|
|
|
msg = (struct xpc_msg_sn2 *)((u64)ch_sn2->local_msgqueue +
|
|
|
|
(get % ch->local_nentries) *
|
|
|
|
ch->entry_size);
|
2009-01-29 15:25:07 -07:00
|
|
|
DBUG_ON(!(msg->flags & XPC_M_SN2_READY));
|
2008-07-29 22:34:09 -07:00
|
|
|
msg->flags = 0;
|
|
|
|
} while (++get < ch_sn2->remote_GP.get);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Clear some of the msg flags in the remote message queue.
|
|
|
|
*/
|
|
|
|
static inline void
|
|
|
|
xpc_clear_remote_msgqueue_flags_sn2(struct xpc_channel *ch)
|
|
|
|
{
|
|
|
|
struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
|
2008-07-29 22:34:19 -07:00
|
|
|
struct xpc_msg_sn2 *msg;
|
2008-07-29 22:34:09 -07:00
|
|
|
s64 put;
|
|
|
|
|
2009-01-29 15:25:07 -07:00
|
|
|
/* flags are zeroed when the buffer is allocated */
|
|
|
|
if (ch_sn2->remote_GP.put < ch->remote_nentries)
|
|
|
|
return;
|
|
|
|
|
|
|
|
put = max(ch_sn2->w_remote_GP.put, ch->remote_nentries);
|
2008-07-29 22:34:09 -07:00
|
|
|
do {
|
2008-07-29 22:34:19 -07:00
|
|
|
msg = (struct xpc_msg_sn2 *)((u64)ch_sn2->remote_msgqueue +
|
|
|
|
(put % ch->remote_nentries) *
|
|
|
|
ch->entry_size);
|
2009-01-29 15:25:07 -07:00
|
|
|
DBUG_ON(!(msg->flags & XPC_M_SN2_READY));
|
|
|
|
DBUG_ON(!(msg->flags & XPC_M_SN2_DONE));
|
|
|
|
DBUG_ON(msg->number != put - ch->remote_nentries);
|
2008-07-29 22:34:09 -07:00
|
|
|
msg->flags = 0;
|
|
|
|
} while (++put < ch_sn2->remote_GP.put);
|
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:19 -07:00
|
|
|
static int
|
|
|
|
xpc_n_of_deliverable_payloads_sn2(struct xpc_channel *ch)
|
|
|
|
{
|
|
|
|
return ch->sn.sn2.w_remote_GP.put - ch->sn.sn2.w_local_GP.get;
|
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
static void
|
2008-07-29 22:34:10 -07:00
|
|
|
xpc_process_msg_chctl_flags_sn2(struct xpc_partition *part, int ch_number)
|
2008-07-29 22:34:09 -07:00
|
|
|
{
|
|
|
|
struct xpc_channel *ch = &part->channels[ch_number];
|
|
|
|
struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
|
2008-07-29 22:34:19 -07:00
|
|
|
int npayloads_sent;
|
2008-07-29 22:34:09 -07:00
|
|
|
|
|
|
|
ch_sn2->remote_GP = part->sn.sn2.remote_GPs[ch_number];
|
|
|
|
|
|
|
|
/* See what, if anything, has changed for each connected channel */
|
|
|
|
|
|
|
|
xpc_msgqueue_ref(ch);
|
|
|
|
|
|
|
|
if (ch_sn2->w_remote_GP.get == ch_sn2->remote_GP.get &&
|
|
|
|
ch_sn2->w_remote_GP.put == ch_sn2->remote_GP.put) {
|
|
|
|
/* nothing changed since GPs were last pulled */
|
|
|
|
xpc_msgqueue_deref(ch);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!(ch->flags & XPC_C_CONNECTED)) {
|
|
|
|
xpc_msgqueue_deref(ch);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* First check to see if messages recently sent by us have been
|
|
|
|
* received by the other side. (The remote GET value will have
|
|
|
|
* changed since we last looked at it.)
|
|
|
|
*/
|
|
|
|
|
|
|
|
if (ch_sn2->w_remote_GP.get != ch_sn2->remote_GP.get) {
|
|
|
|
|
|
|
|
/*
|
|
|
|
* We need to notify any senders that want to be notified
|
|
|
|
* that their sent messages have been received by their
|
|
|
|
* intended recipients. We need to do this before updating
|
|
|
|
* w_remote_GP.get so that we don't allocate the same message
|
|
|
|
* queue entries prematurely (see xpc_allocate_msg()).
|
|
|
|
*/
|
|
|
|
if (atomic_read(&ch->n_to_notify) > 0) {
|
|
|
|
/*
|
|
|
|
* Notify senders that messages sent have been
|
|
|
|
* received and delivered by the other side.
|
|
|
|
*/
|
|
|
|
xpc_notify_senders_sn2(ch, xpMsgDelivered,
|
|
|
|
ch_sn2->remote_GP.get);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Clear msg->flags in previously sent messages, so that
|
|
|
|
* they're ready for xpc_allocate_msg().
|
|
|
|
*/
|
|
|
|
xpc_clear_local_msgqueue_flags_sn2(ch);
|
|
|
|
|
|
|
|
ch_sn2->w_remote_GP.get = ch_sn2->remote_GP.get;
|
|
|
|
|
|
|
|
dev_dbg(xpc_chan, "w_remote_GP.get changed to %ld, partid=%d, "
|
|
|
|
"channel=%d\n", ch_sn2->w_remote_GP.get, ch->partid,
|
|
|
|
ch->number);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If anyone was waiting for message queue entries to become
|
|
|
|
* available, wake them up.
|
|
|
|
*/
|
|
|
|
if (atomic_read(&ch->n_on_msg_allocate_wq) > 0)
|
|
|
|
wake_up(&ch->msg_allocate_wq);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Now check for newly sent messages by the other side. (The remote
|
|
|
|
* PUT value will have changed since we last looked at it.)
|
|
|
|
*/
|
|
|
|
|
|
|
|
if (ch_sn2->w_remote_GP.put != ch_sn2->remote_GP.put) {
|
|
|
|
/*
|
|
|
|
* Clear msg->flags in previously received messages, so that
|
2008-07-29 22:34:19 -07:00
|
|
|
* they're ready for xpc_get_deliverable_payload_sn2().
|
2008-07-29 22:34:09 -07:00
|
|
|
*/
|
|
|
|
xpc_clear_remote_msgqueue_flags_sn2(ch);
|
|
|
|
|
2009-01-29 15:25:06 -07:00
|
|
|
smp_wmb(); /* ensure flags have been cleared before bte_copy */
|
2008-07-29 22:34:09 -07:00
|
|
|
ch_sn2->w_remote_GP.put = ch_sn2->remote_GP.put;
|
|
|
|
|
|
|
|
dev_dbg(xpc_chan, "w_remote_GP.put changed to %ld, partid=%d, "
|
|
|
|
"channel=%d\n", ch_sn2->w_remote_GP.put, ch->partid,
|
|
|
|
ch->number);
|
|
|
|
|
2008-07-29 22:34:19 -07:00
|
|
|
npayloads_sent = xpc_n_of_deliverable_payloads_sn2(ch);
|
|
|
|
if (npayloads_sent > 0) {
|
2008-07-29 22:34:09 -07:00
|
|
|
dev_dbg(xpc_chan, "msgs waiting to be copied and "
|
|
|
|
"delivered=%d, partid=%d, channel=%d\n",
|
2008-07-29 22:34:19 -07:00
|
|
|
npayloads_sent, ch->partid, ch->number);
|
2008-07-29 22:34:09 -07:00
|
|
|
|
|
|
|
if (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE)
|
2008-07-29 22:34:19 -07:00
|
|
|
xpc_activate_kthreads(ch, npayloads_sent);
|
2008-07-29 22:34:09 -07:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
xpc_msgqueue_deref(ch);
|
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:19 -07:00
|
|
|
static struct xpc_msg_sn2 *
|
2008-07-29 22:34:06 -07:00
|
|
|
xpc_pull_remote_msg_sn2(struct xpc_channel *ch, s64 get)
|
|
|
|
{
|
|
|
|
struct xpc_partition *part = &xpc_partitions[ch->partid];
|
2008-07-29 22:34:09 -07:00
|
|
|
struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
|
2008-07-29 22:34:16 -07:00
|
|
|
unsigned long remote_msg_pa;
|
2008-07-29 22:34:19 -07:00
|
|
|
struct xpc_msg_sn2 *msg;
|
2008-07-29 22:34:16 -07:00
|
|
|
u32 msg_index;
|
|
|
|
u32 nmsgs;
|
2008-07-29 22:34:06 -07:00
|
|
|
u64 msg_offset;
|
|
|
|
enum xp_retval ret;
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
if (mutex_lock_interruptible(&ch_sn2->msg_to_pull_mutex) != 0) {
|
2008-07-29 22:34:06 -07:00
|
|
|
/* we were interrupted by a signal */
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
while (get >= ch_sn2->next_msg_to_pull) {
|
2008-07-29 22:34:06 -07:00
|
|
|
|
|
|
|
/* pull as many messages as are ready and able to be pulled */
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
msg_index = ch_sn2->next_msg_to_pull % ch->remote_nentries;
|
2008-07-29 22:34:06 -07:00
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
DBUG_ON(ch_sn2->next_msg_to_pull >= ch_sn2->w_remote_GP.put);
|
|
|
|
nmsgs = ch_sn2->w_remote_GP.put - ch_sn2->next_msg_to_pull;
|
2008-07-29 22:34:06 -07:00
|
|
|
if (msg_index + nmsgs > ch->remote_nentries) {
|
|
|
|
/* ignore the ones that wrap the msg queue for now */
|
|
|
|
nmsgs = ch->remote_nentries - msg_index;
|
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:19 -07:00
|
|
|
msg_offset = msg_index * ch->entry_size;
|
|
|
|
msg = (struct xpc_msg_sn2 *)((u64)ch_sn2->remote_msgqueue +
|
2008-07-29 22:34:18 -07:00
|
|
|
msg_offset);
|
|
|
|
remote_msg_pa = ch_sn2->remote_msgqueue_pa + msg_offset;
|
2008-07-29 22:34:06 -07:00
|
|
|
|
2008-07-29 22:34:16 -07:00
|
|
|
ret = xpc_pull_remote_cachelines_sn2(part, msg, remote_msg_pa,
|
2008-07-29 22:34:19 -07:00
|
|
|
nmsgs * ch->entry_size);
|
2008-07-29 22:34:06 -07:00
|
|
|
if (ret != xpSuccess) {
|
|
|
|
|
|
|
|
dev_dbg(xpc_chan, "failed to pull %d msgs starting with"
|
|
|
|
" msg %ld from partition %d, channel=%d, "
|
2008-07-29 22:34:09 -07:00
|
|
|
"ret=%d\n", nmsgs, ch_sn2->next_msg_to_pull,
|
2008-07-29 22:34:06 -07:00
|
|
|
ch->partid, ch->number, ret);
|
|
|
|
|
|
|
|
XPC_DEACTIVATE_PARTITION(part, ret);
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
mutex_unlock(&ch_sn2->msg_to_pull_mutex);
|
2008-07-29 22:34:06 -07:00
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
ch_sn2->next_msg_to_pull += nmsgs;
|
2008-07-29 22:34:06 -07:00
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
mutex_unlock(&ch_sn2->msg_to_pull_mutex);
|
2008-07-29 22:34:06 -07:00
|
|
|
|
|
|
|
/* return the message we were looking for */
|
2008-07-29 22:34:19 -07:00
|
|
|
msg_offset = (get % ch->remote_nentries) * ch->entry_size;
|
|
|
|
msg = (struct xpc_msg_sn2 *)((u64)ch_sn2->remote_msgqueue + msg_offset);
|
2008-07-29 22:34:06 -07:00
|
|
|
|
|
|
|
return msg;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2008-07-29 22:34:19 -07:00
|
|
|
* Get the next deliverable message's payload.
|
2008-07-29 22:34:06 -07:00
|
|
|
*/
|
2008-07-29 22:34:19 -07:00
|
|
|
static void *
|
|
|
|
xpc_get_deliverable_payload_sn2(struct xpc_channel *ch)
|
2008-07-29 22:34:06 -07:00
|
|
|
{
|
2008-07-29 22:34:09 -07:00
|
|
|
struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
|
2008-07-29 22:34:19 -07:00
|
|
|
struct xpc_msg_sn2 *msg;
|
|
|
|
void *payload = NULL;
|
2008-07-29 22:34:06 -07:00
|
|
|
s64 get;
|
|
|
|
|
|
|
|
do {
|
|
|
|
if (ch->flags & XPC_C_DISCONNECTING)
|
|
|
|
break;
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
get = ch_sn2->w_local_GP.get;
|
2009-01-29 15:25:06 -07:00
|
|
|
smp_rmb(); /* guarantee that .get loads before .put */
|
2008-07-29 22:34:09 -07:00
|
|
|
if (get == ch_sn2->w_remote_GP.put)
|
2008-07-29 22:34:06 -07:00
|
|
|
break;
|
|
|
|
|
|
|
|
/* There are messages waiting to be pulled and delivered.
|
|
|
|
* We need to try to secure one for ourselves. We'll do this
|
|
|
|
* by trying to increment w_local_GP.get and hope that no one
|
|
|
|
* else beats us to it. If they do, we'll we'll simply have
|
|
|
|
* to try again for the next one.
|
|
|
|
*/
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
if (cmpxchg(&ch_sn2->w_local_GP.get, get, get + 1) == get) {
|
2008-07-29 22:34:06 -07:00
|
|
|
/* we got the entry referenced by get */
|
|
|
|
|
|
|
|
dev_dbg(xpc_chan, "w_local_GP.get changed to %ld, "
|
|
|
|
"partid=%d, channel=%d\n", get + 1,
|
|
|
|
ch->partid, ch->number);
|
|
|
|
|
|
|
|
/* pull the message from the remote partition */
|
|
|
|
|
|
|
|
msg = xpc_pull_remote_msg_sn2(ch, get);
|
|
|
|
|
2009-01-29 15:25:07 -07:00
|
|
|
if (msg != NULL) {
|
|
|
|
DBUG_ON(msg->number != get);
|
|
|
|
DBUG_ON(msg->flags & XPC_M_SN2_DONE);
|
|
|
|
DBUG_ON(!(msg->flags & XPC_M_SN2_READY));
|
2008-07-29 22:34:06 -07:00
|
|
|
|
2009-01-29 15:25:07 -07:00
|
|
|
payload = &msg->payload;
|
|
|
|
}
|
2008-07-29 22:34:06 -07:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
} while (1);
|
|
|
|
|
2008-07-29 22:34:19 -07:00
|
|
|
return payload;
|
2008-07-29 22:34:06 -07:00
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:07 -07:00
|
|
|
/*
|
|
|
|
* Now we actually send the messages that are ready to be sent by advancing
|
2008-07-29 22:34:10 -07:00
|
|
|
* the local message queue's Put value and then send a chctl msgrequest to the
|
|
|
|
* recipient partition.
|
2008-07-29 22:34:07 -07:00
|
|
|
*/
|
|
|
|
static void
|
|
|
|
xpc_send_msgs_sn2(struct xpc_channel *ch, s64 initial_put)
|
|
|
|
{
|
2008-07-29 22:34:09 -07:00
|
|
|
struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
|
2008-07-29 22:34:19 -07:00
|
|
|
struct xpc_msg_sn2 *msg;
|
2008-07-29 22:34:07 -07:00
|
|
|
s64 put = initial_put + 1;
|
2008-07-29 22:34:10 -07:00
|
|
|
int send_msgrequest = 0;
|
2008-07-29 22:34:07 -07:00
|
|
|
|
|
|
|
while (1) {
|
|
|
|
|
|
|
|
while (1) {
|
2008-07-29 22:34:09 -07:00
|
|
|
if (put == ch_sn2->w_local_GP.put)
|
2008-07-29 22:34:07 -07:00
|
|
|
break;
|
|
|
|
|
2008-07-29 22:34:19 -07:00
|
|
|
msg = (struct xpc_msg_sn2 *)((u64)ch_sn2->
|
|
|
|
local_msgqueue + (put %
|
|
|
|
ch->local_nentries) *
|
|
|
|
ch->entry_size);
|
2008-07-29 22:34:07 -07:00
|
|
|
|
2008-07-29 22:34:19 -07:00
|
|
|
if (!(msg->flags & XPC_M_SN2_READY))
|
2008-07-29 22:34:07 -07:00
|
|
|
break;
|
|
|
|
|
|
|
|
put++;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (put == initial_put) {
|
|
|
|
/* nothing's changed */
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
if (cmpxchg_rel(&ch_sn2->local_GP->put, initial_put, put) !=
|
2008-07-29 22:34:07 -07:00
|
|
|
initial_put) {
|
|
|
|
/* someone else beat us to it */
|
2008-07-29 22:34:09 -07:00
|
|
|
DBUG_ON(ch_sn2->local_GP->put < initial_put);
|
2008-07-29 22:34:07 -07:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* we just set the new value of local_GP->put */
|
|
|
|
|
|
|
|
dev_dbg(xpc_chan, "local_GP->put changed to %ld, partid=%d, "
|
|
|
|
"channel=%d\n", put, ch->partid, ch->number);
|
|
|
|
|
2008-07-29 22:34:10 -07:00
|
|
|
send_msgrequest = 1;
|
2008-07-29 22:34:07 -07:00
|
|
|
|
|
|
|
/*
|
|
|
|
* We need to ensure that the message referenced by
|
2008-07-29 22:34:19 -07:00
|
|
|
* local_GP->put is not XPC_M_SN2_READY or that local_GP->put
|
2008-07-29 22:34:07 -07:00
|
|
|
* equals w_local_GP.put, so we'll go have a look.
|
|
|
|
*/
|
|
|
|
initial_put = put;
|
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:10 -07:00
|
|
|
if (send_msgrequest)
|
|
|
|
xpc_send_chctl_msgrequest_sn2(ch);
|
2008-07-29 22:34:07 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Allocate an entry for a message from the message queue associated with the
|
|
|
|
* specified channel.
|
|
|
|
*/
|
|
|
|
static enum xp_retval
|
|
|
|
xpc_allocate_msg_sn2(struct xpc_channel *ch, u32 flags,
|
2008-07-29 22:34:19 -07:00
|
|
|
struct xpc_msg_sn2 **address_of_msg)
|
2008-07-29 22:34:07 -07:00
|
|
|
{
|
2008-07-29 22:34:09 -07:00
|
|
|
struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
|
2008-07-29 22:34:19 -07:00
|
|
|
struct xpc_msg_sn2 *msg;
|
2008-07-29 22:34:07 -07:00
|
|
|
enum xp_retval ret;
|
|
|
|
s64 put;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Get the next available message entry from the local message queue.
|
|
|
|
* If none are available, we'll make sure that we grab the latest
|
|
|
|
* GP values.
|
|
|
|
*/
|
|
|
|
ret = xpTimeout;
|
|
|
|
|
|
|
|
while (1) {
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
put = ch_sn2->w_local_GP.put;
|
2009-01-29 15:25:06 -07:00
|
|
|
smp_rmb(); /* guarantee that .put loads before .get */
|
2008-07-29 22:34:09 -07:00
|
|
|
if (put - ch_sn2->w_remote_GP.get < ch->local_nentries) {
|
2008-07-29 22:34:07 -07:00
|
|
|
|
|
|
|
/* There are available message entries. We need to try
|
|
|
|
* to secure one for ourselves. We'll do this by trying
|
|
|
|
* to increment w_local_GP.put as long as someone else
|
|
|
|
* doesn't beat us to it. If they do, we'll have to
|
|
|
|
* try again.
|
|
|
|
*/
|
2008-07-29 22:34:09 -07:00
|
|
|
if (cmpxchg(&ch_sn2->w_local_GP.put, put, put + 1) ==
|
|
|
|
put) {
|
2008-07-29 22:34:07 -07:00
|
|
|
/* we got the entry referenced by put */
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
continue; /* try again */
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* There aren't any available msg entries at this time.
|
|
|
|
*
|
|
|
|
* In waiting for a message entry to become available,
|
2008-07-29 22:34:10 -07:00
|
|
|
* we set a timeout in case the other side is not sending
|
|
|
|
* completion interrupts. This lets us fake a notify IRQ
|
|
|
|
* that will cause the notify IRQ handler to fetch the latest
|
|
|
|
* GP values as if an interrupt was sent by the other side.
|
2008-07-29 22:34:07 -07:00
|
|
|
*/
|
|
|
|
if (ret == xpTimeout)
|
2008-07-29 22:34:10 -07:00
|
|
|
xpc_send_chctl_local_msgrequest_sn2(ch);
|
2008-07-29 22:34:07 -07:00
|
|
|
|
2008-07-29 22:34:08 -07:00
|
|
|
if (flags & XPC_NOWAIT)
|
2008-07-29 22:34:07 -07:00
|
|
|
return xpNoWait;
|
|
|
|
|
|
|
|
ret = xpc_allocate_msg_wait(ch);
|
2008-07-29 22:34:08 -07:00
|
|
|
if (ret != xpInterrupted && ret != xpTimeout)
|
2008-07-29 22:34:07 -07:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* get the message's address and initialize it */
|
2008-07-29 22:34:19 -07:00
|
|
|
msg = (struct xpc_msg_sn2 *)((u64)ch_sn2->local_msgqueue +
|
|
|
|
(put % ch->local_nentries) *
|
|
|
|
ch->entry_size);
|
2008-07-29 22:34:07 -07:00
|
|
|
|
|
|
|
DBUG_ON(msg->flags != 0);
|
|
|
|
msg->number = put;
|
|
|
|
|
|
|
|
dev_dbg(xpc_chan, "w_local_GP.put changed to %ld; msg=0x%p, "
|
|
|
|
"msg_number=%ld, partid=%d, channel=%d\n", put + 1,
|
|
|
|
(void *)msg, msg->number, ch->partid, ch->number);
|
|
|
|
|
|
|
|
*address_of_msg = msg;
|
|
|
|
return xpSuccess;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Common code that does the actual sending of the message by advancing the
|
2008-07-29 22:34:10 -07:00
|
|
|
* local message queue's Put value and sends a chctl msgrequest to the
|
|
|
|
* partition the message is being sent to.
|
2008-07-29 22:34:07 -07:00
|
|
|
*/
|
|
|
|
static enum xp_retval
|
2008-07-29 22:34:19 -07:00
|
|
|
xpc_send_payload_sn2(struct xpc_channel *ch, u32 flags, void *payload,
|
|
|
|
u16 payload_size, u8 notify_type, xpc_notify_func func,
|
|
|
|
void *key)
|
2008-07-29 22:34:07 -07:00
|
|
|
{
|
|
|
|
enum xp_retval ret = xpSuccess;
|
2008-07-29 22:34:18 -07:00
|
|
|
struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
|
2008-07-29 22:34:19 -07:00
|
|
|
struct xpc_msg_sn2 *msg = msg;
|
|
|
|
struct xpc_notify_sn2 *notify = notify;
|
2008-07-29 22:34:08 -07:00
|
|
|
s64 msg_number;
|
|
|
|
s64 put;
|
2008-07-29 22:34:07 -07:00
|
|
|
|
|
|
|
DBUG_ON(notify_type == XPC_N_CALL && func == NULL);
|
2008-07-29 22:34:08 -07:00
|
|
|
|
2008-07-29 22:34:19 -07:00
|
|
|
if (XPC_MSG_SIZE(payload_size) > ch->entry_size)
|
2008-07-29 22:34:08 -07:00
|
|
|
return xpPayloadTooBig;
|
|
|
|
|
|
|
|
xpc_msgqueue_ref(ch);
|
2008-07-29 22:34:07 -07:00
|
|
|
|
|
|
|
if (ch->flags & XPC_C_DISCONNECTING) {
|
2008-07-29 22:34:08 -07:00
|
|
|
ret = ch->reason;
|
|
|
|
goto out_1;
|
|
|
|
}
|
|
|
|
if (!(ch->flags & XPC_C_CONNECTED)) {
|
|
|
|
ret = xpNotConnected;
|
|
|
|
goto out_1;
|
2008-07-29 22:34:07 -07:00
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:08 -07:00
|
|
|
ret = xpc_allocate_msg_sn2(ch, flags, &msg);
|
|
|
|
if (ret != xpSuccess)
|
|
|
|
goto out_1;
|
|
|
|
|
|
|
|
msg_number = msg->number;
|
|
|
|
|
2008-07-29 22:34:07 -07:00
|
|
|
if (notify_type != 0) {
|
|
|
|
/*
|
|
|
|
* Tell the remote side to send an ACK interrupt when the
|
|
|
|
* message has been delivered.
|
|
|
|
*/
|
2008-07-29 22:34:19 -07:00
|
|
|
msg->flags |= XPC_M_SN2_INTERRUPT;
|
2008-07-29 22:34:07 -07:00
|
|
|
|
|
|
|
atomic_inc(&ch->n_to_notify);
|
|
|
|
|
2008-07-29 22:34:18 -07:00
|
|
|
notify = &ch_sn2->notify_queue[msg_number % ch->local_nentries];
|
2008-07-29 22:34:07 -07:00
|
|
|
notify->func = func;
|
|
|
|
notify->key = key;
|
|
|
|
notify->type = notify_type;
|
|
|
|
|
2008-07-29 22:34:14 -07:00
|
|
|
/* ??? Is a mb() needed here? */
|
2008-07-29 22:34:07 -07:00
|
|
|
|
|
|
|
if (ch->flags & XPC_C_DISCONNECTING) {
|
|
|
|
/*
|
|
|
|
* An error occurred between our last error check and
|
|
|
|
* this one. We will try to clear the type field from
|
|
|
|
* the notify entry. If we succeed then
|
|
|
|
* xpc_disconnect_channel() didn't already process
|
|
|
|
* the notify entry.
|
|
|
|
*/
|
|
|
|
if (cmpxchg(¬ify->type, notify_type, 0) ==
|
|
|
|
notify_type) {
|
|
|
|
atomic_dec(&ch->n_to_notify);
|
|
|
|
ret = ch->reason;
|
|
|
|
}
|
2008-07-29 22:34:08 -07:00
|
|
|
goto out_1;
|
2008-07-29 22:34:07 -07:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:08 -07:00
|
|
|
memcpy(&msg->payload, payload, payload_size);
|
|
|
|
|
2008-07-29 22:34:19 -07:00
|
|
|
msg->flags |= XPC_M_SN2_READY;
|
2008-07-29 22:34:07 -07:00
|
|
|
|
|
|
|
/*
|
|
|
|
* The preceding store of msg->flags must occur before the following
|
2008-07-29 22:34:09 -07:00
|
|
|
* load of local_GP->put.
|
2008-07-29 22:34:07 -07:00
|
|
|
*/
|
2009-01-29 15:25:06 -07:00
|
|
|
smp_mb();
|
2008-07-29 22:34:07 -07:00
|
|
|
|
|
|
|
/* see if the message is next in line to be sent, if so send it */
|
|
|
|
|
2008-07-29 22:34:18 -07:00
|
|
|
put = ch_sn2->local_GP->put;
|
2008-07-29 22:34:07 -07:00
|
|
|
if (put == msg_number)
|
|
|
|
xpc_send_msgs_sn2(ch, put);
|
|
|
|
|
2008-07-29 22:34:08 -07:00
|
|
|
out_1:
|
2008-07-29 22:34:07 -07:00
|
|
|
xpc_msgqueue_deref(ch);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Now we actually acknowledge the messages that have been delivered and ack'd
|
|
|
|
* by advancing the cached remote message queue's Get value and if requested
|
2008-07-29 22:34:10 -07:00
|
|
|
* send a chctl msgrequest to the message sender's partition.
|
2008-07-29 22:34:19 -07:00
|
|
|
*
|
|
|
|
* If a message has XPC_M_SN2_INTERRUPT set, send an interrupt to the partition
|
|
|
|
* that sent the message.
|
2008-07-29 22:34:07 -07:00
|
|
|
*/
|
|
|
|
static void
|
|
|
|
xpc_acknowledge_msgs_sn2(struct xpc_channel *ch, s64 initial_get, u8 msg_flags)
|
|
|
|
{
|
2008-07-29 22:34:09 -07:00
|
|
|
struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
|
2008-07-29 22:34:19 -07:00
|
|
|
struct xpc_msg_sn2 *msg;
|
2008-07-29 22:34:07 -07:00
|
|
|
s64 get = initial_get + 1;
|
2008-07-29 22:34:10 -07:00
|
|
|
int send_msgrequest = 0;
|
2008-07-29 22:34:07 -07:00
|
|
|
|
|
|
|
while (1) {
|
|
|
|
|
|
|
|
while (1) {
|
2008-07-29 22:34:09 -07:00
|
|
|
if (get == ch_sn2->w_local_GP.get)
|
2008-07-29 22:34:07 -07:00
|
|
|
break;
|
|
|
|
|
2008-07-29 22:34:19 -07:00
|
|
|
msg = (struct xpc_msg_sn2 *)((u64)ch_sn2->
|
|
|
|
remote_msgqueue + (get %
|
|
|
|
ch->remote_nentries) *
|
|
|
|
ch->entry_size);
|
2008-07-29 22:34:07 -07:00
|
|
|
|
2008-07-29 22:34:19 -07:00
|
|
|
if (!(msg->flags & XPC_M_SN2_DONE))
|
2008-07-29 22:34:07 -07:00
|
|
|
break;
|
|
|
|
|
|
|
|
msg_flags |= msg->flags;
|
|
|
|
get++;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (get == initial_get) {
|
|
|
|
/* nothing's changed */
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
if (cmpxchg_rel(&ch_sn2->local_GP->get, initial_get, get) !=
|
2008-07-29 22:34:07 -07:00
|
|
|
initial_get) {
|
|
|
|
/* someone else beat us to it */
|
2008-07-29 22:34:09 -07:00
|
|
|
DBUG_ON(ch_sn2->local_GP->get <= initial_get);
|
2008-07-29 22:34:07 -07:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* we just set the new value of local_GP->get */
|
|
|
|
|
|
|
|
dev_dbg(xpc_chan, "local_GP->get changed to %ld, partid=%d, "
|
|
|
|
"channel=%d\n", get, ch->partid, ch->number);
|
|
|
|
|
2008-07-29 22:34:19 -07:00
|
|
|
send_msgrequest = (msg_flags & XPC_M_SN2_INTERRUPT);
|
2008-07-29 22:34:07 -07:00
|
|
|
|
|
|
|
/*
|
|
|
|
* We need to ensure that the message referenced by
|
2008-07-29 22:34:19 -07:00
|
|
|
* local_GP->get is not XPC_M_SN2_DONE or that local_GP->get
|
2008-07-29 22:34:07 -07:00
|
|
|
* equals w_local_GP.get, so we'll go have a look.
|
|
|
|
*/
|
|
|
|
initial_get = get;
|
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:10 -07:00
|
|
|
if (send_msgrequest)
|
|
|
|
xpc_send_chctl_msgrequest_sn2(ch);
|
2008-07-29 22:34:07 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
2008-07-29 22:34:19 -07:00
|
|
|
xpc_received_payload_sn2(struct xpc_channel *ch, void *payload)
|
2008-07-29 22:34:07 -07:00
|
|
|
{
|
2008-07-29 22:34:19 -07:00
|
|
|
struct xpc_msg_sn2 *msg;
|
|
|
|
s64 msg_number;
|
2008-07-29 22:34:07 -07:00
|
|
|
s64 get;
|
2008-07-29 22:34:19 -07:00
|
|
|
|
|
|
|
msg = container_of(payload, struct xpc_msg_sn2, payload);
|
|
|
|
msg_number = msg->number;
|
2008-07-29 22:34:07 -07:00
|
|
|
|
|
|
|
dev_dbg(xpc_chan, "msg=0x%p, msg_number=%ld, partid=%d, channel=%d\n",
|
|
|
|
(void *)msg, msg_number, ch->partid, ch->number);
|
|
|
|
|
2009-01-29 15:25:07 -07:00
|
|
|
DBUG_ON((((u64)msg - (u64)ch->sn.sn2.remote_msgqueue) / ch->entry_size) !=
|
2008-07-29 22:34:07 -07:00
|
|
|
msg_number % ch->remote_nentries);
|
2009-01-29 15:25:07 -07:00
|
|
|
DBUG_ON(!(msg->flags & XPC_M_SN2_READY));
|
2008-07-29 22:34:19 -07:00
|
|
|
DBUG_ON(msg->flags & XPC_M_SN2_DONE);
|
2008-07-29 22:34:07 -07:00
|
|
|
|
2008-07-29 22:34:19 -07:00
|
|
|
msg->flags |= XPC_M_SN2_DONE;
|
2008-07-29 22:34:07 -07:00
|
|
|
|
|
|
|
/*
|
|
|
|
* The preceding store of msg->flags must occur before the following
|
2008-07-29 22:34:09 -07:00
|
|
|
* load of local_GP->get.
|
2008-07-29 22:34:07 -07:00
|
|
|
*/
|
2009-01-29 15:25:06 -07:00
|
|
|
smp_mb();
|
2008-07-29 22:34:07 -07:00
|
|
|
|
|
|
|
/*
|
|
|
|
* See if this message is next in line to be acknowledged as having
|
|
|
|
* been delivered.
|
|
|
|
*/
|
2008-07-29 22:34:09 -07:00
|
|
|
get = ch->sn.sn2.local_GP->get;
|
2008-07-29 22:34:07 -07:00
|
|
|
if (get == msg_number)
|
|
|
|
xpc_acknowledge_msgs_sn2(ch, get, msg->flags);
|
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
int
|
2008-07-29 22:34:05 -07:00
|
|
|
xpc_init_sn2(void)
|
|
|
|
{
|
2008-07-29 22:34:09 -07:00
|
|
|
int ret;
|
2008-07-29 22:34:13 -07:00
|
|
|
size_t buf_size;
|
2008-07-29 22:34:09 -07:00
|
|
|
|
2008-07-29 22:34:18 -07:00
|
|
|
xpc_setup_partitions_sn = xpc_setup_partitions_sn_sn2;
|
2009-04-02 16:59:10 -07:00
|
|
|
xpc_teardown_partitions_sn = xpc_teardown_partitions_sn_sn2;
|
2008-07-29 22:34:16 -07:00
|
|
|
xpc_get_partition_rsvd_page_pa = xpc_get_partition_rsvd_page_pa_sn2;
|
2008-07-29 22:34:18 -07:00
|
|
|
xpc_setup_rsvd_page_sn = xpc_setup_rsvd_page_sn_sn2;
|
2008-07-29 22:34:07 -07:00
|
|
|
xpc_increment_heartbeat = xpc_increment_heartbeat_sn2;
|
|
|
|
xpc_offline_heartbeat = xpc_offline_heartbeat_sn2;
|
|
|
|
xpc_online_heartbeat = xpc_online_heartbeat_sn2;
|
|
|
|
xpc_heartbeat_init = xpc_heartbeat_init_sn2;
|
|
|
|
xpc_heartbeat_exit = xpc_heartbeat_exit_sn2;
|
2008-07-29 22:34:17 -07:00
|
|
|
xpc_get_remote_heartbeat = xpc_get_remote_heartbeat_sn2;
|
2008-07-29 22:34:07 -07:00
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
xpc_request_partition_activation = xpc_request_partition_activation_sn2;
|
|
|
|
xpc_request_partition_reactivation =
|
|
|
|
xpc_request_partition_reactivation_sn2;
|
|
|
|
xpc_request_partition_deactivation =
|
|
|
|
xpc_request_partition_deactivation_sn2;
|
|
|
|
xpc_cancel_partition_deactivation_request =
|
|
|
|
xpc_cancel_partition_deactivation_request_sn2;
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
xpc_process_activate_IRQ_rcvd = xpc_process_activate_IRQ_rcvd_sn2;
|
2008-07-29 22:34:18 -07:00
|
|
|
xpc_setup_ch_structures_sn = xpc_setup_ch_structures_sn_sn2;
|
|
|
|
xpc_teardown_ch_structures_sn = xpc_teardown_ch_structures_sn_sn2;
|
2008-07-29 22:34:06 -07:00
|
|
|
xpc_make_first_contact = xpc_make_first_contact_sn2;
|
2008-07-29 22:34:18 -07:00
|
|
|
|
2008-07-29 22:34:10 -07:00
|
|
|
xpc_get_chctl_all_flags = xpc_get_chctl_all_flags_sn2;
|
2008-07-29 22:34:18 -07:00
|
|
|
xpc_send_chctl_closerequest = xpc_send_chctl_closerequest_sn2;
|
|
|
|
xpc_send_chctl_closereply = xpc_send_chctl_closereply_sn2;
|
|
|
|
xpc_send_chctl_openrequest = xpc_send_chctl_openrequest_sn2;
|
|
|
|
xpc_send_chctl_openreply = xpc_send_chctl_openreply_sn2;
|
|
|
|
|
|
|
|
xpc_save_remote_msgqueue_pa = xpc_save_remote_msgqueue_pa_sn2;
|
|
|
|
|
|
|
|
xpc_setup_msg_structures = xpc_setup_msg_structures_sn2;
|
|
|
|
xpc_teardown_msg_structures = xpc_teardown_msg_structures_sn2;
|
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
xpc_notify_senders_of_disconnect = xpc_notify_senders_of_disconnect_sn2;
|
2008-07-29 22:34:10 -07:00
|
|
|
xpc_process_msg_chctl_flags = xpc_process_msg_chctl_flags_sn2;
|
2008-07-29 22:34:19 -07:00
|
|
|
xpc_n_of_deliverable_payloads = xpc_n_of_deliverable_payloads_sn2;
|
|
|
|
xpc_get_deliverable_payload = xpc_get_deliverable_payload_sn2;
|
2008-07-29 22:34:07 -07:00
|
|
|
|
2008-07-29 22:34:09 -07:00
|
|
|
xpc_indicate_partition_engaged = xpc_indicate_partition_engaged_sn2;
|
|
|
|
xpc_indicate_partition_disengaged =
|
|
|
|
xpc_indicate_partition_disengaged_sn2;
|
2008-07-29 22:34:18 -07:00
|
|
|
xpc_partition_engaged = xpc_partition_engaged_sn2;
|
|
|
|
xpc_any_partition_engaged = xpc_any_partition_engaged_sn2;
|
2008-07-29 22:34:09 -07:00
|
|
|
xpc_assume_partition_disengaged = xpc_assume_partition_disengaged_sn2;
|
|
|
|
|
2008-07-29 22:34:19 -07:00
|
|
|
xpc_send_payload = xpc_send_payload_sn2;
|
|
|
|
xpc_received_payload = xpc_received_payload_sn2;
|
|
|
|
|
|
|
|
if (offsetof(struct xpc_msg_sn2, payload) > XPC_MSG_HDR_MAX_SIZE) {
|
|
|
|
dev_err(xpc_part, "header portion of struct xpc_msg_sn2 is "
|
|
|
|
"larger than %d\n", XPC_MSG_HDR_MAX_SIZE);
|
|
|
|
return -E2BIG;
|
|
|
|
}
|
2008-07-29 22:34:09 -07:00
|
|
|
|
2008-07-29 22:34:13 -07:00
|
|
|
buf_size = max(XPC_RP_VARS_SIZE,
|
|
|
|
XPC_RP_HEADER_SIZE + XP_NASID_MASK_BYTES_SN2);
|
|
|
|
xpc_remote_copy_buffer_sn2 = xpc_kmalloc_cacheline_aligned(buf_size,
|
|
|
|
GFP_KERNEL,
|
|
|
|
&xpc_remote_copy_buffer_base_sn2);
|
|
|
|
if (xpc_remote_copy_buffer_sn2 == NULL) {
|
|
|
|
dev_err(xpc_part, "can't get memory for remote copy buffer\n");
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
2008-07-29 22:34:11 -07:00
|
|
|
/* open up protections for IPI and [potentially] amo operations */
|
2008-07-29 22:34:09 -07:00
|
|
|
xpc_allow_IPI_ops_sn2();
|
2008-07-29 22:34:11 -07:00
|
|
|
xpc_allow_amo_ops_shub_wars_1_1_sn2();
|
2008-07-29 22:34:09 -07:00
|
|
|
|
|
|
|
/*
|
|
|
|
* This is safe to do before the xpc_hb_checker thread has started
|
|
|
|
* because the handler releases a wait queue. If an interrupt is
|
|
|
|
* received before the thread is waiting, it will not go to sleep,
|
|
|
|
* but rather immediately process the interrupt.
|
|
|
|
*/
|
|
|
|
ret = request_irq(SGI_XPC_ACTIVATE, xpc_handle_activate_IRQ_sn2, 0,
|
|
|
|
"xpc hb", NULL);
|
|
|
|
if (ret != 0) {
|
|
|
|
dev_err(xpc_part, "can't register ACTIVATE IRQ handler, "
|
|
|
|
"errno=%d\n", -ret);
|
|
|
|
xpc_disallow_IPI_ops_sn2();
|
2008-07-29 22:34:13 -07:00
|
|
|
kfree(xpc_remote_copy_buffer_base_sn2);
|
2008-07-29 22:34:09 -07:00
|
|
|
}
|
|
|
|
return ret;
|
2008-07-29 22:34:05 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
xpc_exit_sn2(void)
|
|
|
|
{
|
2008-07-29 22:34:09 -07:00
|
|
|
free_irq(SGI_XPC_ACTIVATE, NULL);
|
|
|
|
xpc_disallow_IPI_ops_sn2();
|
2008-07-29 22:34:13 -07:00
|
|
|
kfree(xpc_remote_copy_buffer_base_sn2);
|
2008-07-29 22:34:05 -07:00
|
|
|
}
|