[1] | 1 | /* |
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| 2 | * ppm.c - Per-cluster Physical Pages Manager implementation |
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| 3 | * |
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| 4 | * Authors Ghassan Almaless (2008,2009,2010,2011,2012) |
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[632] | 5 | * Alain Greiner (2016,2017,2018,2019) |
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[1] | 6 | * |
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| 7 | * Copyright (c) UPMC Sorbonne Universites |
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| 8 | * |
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| 9 | * This file is part of ALMOS-MKH. |
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| 10 | * |
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| 11 | * ALMOS-MKH.is free software; you can redistribute it and/or modify it |
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| 12 | * under the terms of the GNU General Public License as published by |
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| 13 | * the Free Software Foundation; version 2.0 of the License. |
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| 14 | * |
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| 15 | * ALMOS-MKH.is distributed in the hope that it will be useful, but |
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| 16 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 18 | * General Public License for more details. |
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| 19 | * |
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| 20 | * You should have received a copy of the GNU General Public License |
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| 21 | * along with ALMOS-MKH.; if not, write to the Free Software Foundation, |
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| 22 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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| 23 | */ |
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| 24 | |
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[14] | 25 | #include <kernel_config.h> |
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[457] | 26 | #include <hal_kernel_types.h> |
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[1] | 27 | #include <hal_special.h> |
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| 28 | #include <printk.h> |
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| 29 | #include <list.h> |
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| 30 | #include <bits.h> |
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| 31 | #include <page.h> |
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[585] | 32 | #include <dqdt.h> |
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[567] | 33 | #include <busylock.h> |
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| 34 | #include <queuelock.h> |
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[1] | 35 | #include <thread.h> |
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| 36 | #include <cluster.h> |
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| 37 | #include <kmem.h> |
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| 38 | #include <process.h> |
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[567] | 39 | #include <mapper.h> |
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[1] | 40 | #include <ppm.h> |
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[606] | 41 | #include <vfs.h> |
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[1] | 42 | |
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[567] | 43 | //////////////////////////////////////////////////////////////////////////////////////// |
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[634] | 44 | // global variables |
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| 45 | //////////////////////////////////////////////////////////////////////////////////////// |
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| 46 | |
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| 47 | extern chdev_directory_t chdev_dir; // allocated in kernel_init.c |
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| 48 | |
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| 49 | //////////////////////////////////////////////////////////////////////////////////////// |
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[567] | 50 | // functions to translate [ page <-> base <-> ppn ] |
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| 51 | //////////////////////////////////////////////////////////////////////////////////////// |
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| 52 | |
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[50] | 53 | ///////////////////////////////////////////// |
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[315] | 54 | inline xptr_t ppm_page2base( xptr_t page_xp ) |
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[1] | 55 | { |
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[315] | 56 | ppm_t * ppm = &LOCAL_CLUSTER->ppm; |
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[1] | 57 | |
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[315] | 58 | cxy_t page_cxy = GET_CXY( page_xp ); |
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[437] | 59 | page_t * page_ptr = GET_PTR( page_xp ); |
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[315] | 60 | |
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[406] | 61 | void * base_ptr = ppm->vaddr_base + |
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| 62 | ((page_ptr - ppm->pages_tbl)<<CONFIG_PPM_PAGE_SHIFT); |
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| 63 | |
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[315] | 64 | return XPTR( page_cxy , base_ptr ); |
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| 65 | |
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| 66 | } // end ppm_page2base() |
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| 67 | |
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| 68 | ///////////////////////////////////////////// |
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| 69 | inline xptr_t ppm_base2page( xptr_t base_xp ) |
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[1] | 70 | { |
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[315] | 71 | ppm_t * ppm = &LOCAL_CLUSTER->ppm; |
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[1] | 72 | |
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[315] | 73 | cxy_t base_cxy = GET_CXY( base_xp ); |
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[437] | 74 | void * base_ptr = GET_PTR( base_xp ); |
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[315] | 75 | |
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| 76 | page_t * page_ptr = ppm->pages_tbl + |
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| 77 | ((base_ptr - ppm->vaddr_base)>>CONFIG_PPM_PAGE_SHIFT); |
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| 78 | |
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| 79 | return XPTR( base_cxy , page_ptr ); |
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| 80 | |
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| 81 | } // end ppm_base2page() |
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| 82 | |
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| 83 | |
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| 84 | |
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[50] | 85 | /////////////////////////////////////////// |
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[315] | 86 | inline ppn_t ppm_page2ppn( xptr_t page_xp ) |
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| 87 | { |
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| 88 | ppm_t * ppm = &LOCAL_CLUSTER->ppm; |
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| 89 | |
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| 90 | cxy_t page_cxy = GET_CXY( page_xp ); |
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[437] | 91 | page_t * page_ptr = GET_PTR( page_xp ); |
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[315] | 92 | |
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| 93 | paddr_t paddr = PADDR( page_cxy , (page_ptr - ppm->pages_tbl)<<CONFIG_PPM_PAGE_SHIFT ); |
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| 94 | |
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[437] | 95 | return (ppn_t)(paddr >> CONFIG_PPM_PAGE_SHIFT); |
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[315] | 96 | |
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| 97 | } // end hal_page2ppn() |
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| 98 | |
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| 99 | /////////////////////////////////////// |
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| 100 | inline xptr_t ppm_ppn2page( ppn_t ppn ) |
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| 101 | { |
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[437] | 102 | ppm_t * ppm = &LOCAL_CLUSTER->ppm; |
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[315] | 103 | |
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[437] | 104 | paddr_t paddr = ((paddr_t)ppn) << CONFIG_PPM_PAGE_SHIFT; |
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[315] | 105 | |
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[437] | 106 | cxy_t cxy = CXY_FROM_PADDR( paddr ); |
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| 107 | lpa_t lpa = LPA_FROM_PADDR( paddr ); |
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[315] | 108 | |
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[437] | 109 | return XPTR( cxy , &ppm->pages_tbl[lpa>>CONFIG_PPM_PAGE_SHIFT] ); |
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[315] | 110 | |
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| 111 | } // end hal_ppn2page |
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| 112 | |
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| 113 | |
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| 114 | |
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| 115 | /////////////////////////////////////// |
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| 116 | inline xptr_t ppm_ppn2base( ppn_t ppn ) |
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| 117 | { |
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[437] | 118 | ppm_t * ppm = &LOCAL_CLUSTER->ppm; |
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[315] | 119 | |
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[437] | 120 | paddr_t paddr = ((paddr_t)ppn) << CONFIG_PPM_PAGE_SHIFT; |
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[315] | 121 | |
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[437] | 122 | cxy_t cxy = CXY_FROM_PADDR( paddr ); |
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| 123 | lpa_t lpa = LPA_FROM_PADDR( paddr ); |
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[315] | 124 | |
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[437] | 125 | return XPTR( cxy , (void *)ppm->vaddr_base + lpa ); |
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[315] | 126 | |
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| 127 | } // end ppm_ppn2base() |
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| 128 | |
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| 129 | /////////////////////////////////////////// |
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| 130 | inline ppn_t ppm_base2ppn( xptr_t base_xp ) |
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| 131 | { |
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| 132 | ppm_t * ppm = &LOCAL_CLUSTER->ppm; |
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| 133 | |
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| 134 | cxy_t base_cxy = GET_CXY( base_xp ); |
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[437] | 135 | void * base_ptr = GET_PTR( base_xp ); |
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[315] | 136 | |
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| 137 | paddr_t paddr = PADDR( base_cxy , (base_ptr - ppm->vaddr_base) ); |
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| 138 | |
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[437] | 139 | return (ppn_t)(paddr >> CONFIG_PPM_PAGE_SHIFT); |
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[315] | 140 | |
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| 141 | } // end ppm_base2ppn() |
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| 142 | |
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| 143 | |
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[567] | 144 | //////////////////////////////////////////////////////////////////////////////////////// |
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| 145 | // functions to allocate / release physical pages |
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| 146 | //////////////////////////////////////////////////////////////////////////////////////// |
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[315] | 147 | |
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| 148 | /////////////////////////////////////////// |
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[50] | 149 | void ppm_free_pages_nolock( page_t * page ) |
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[1] | 150 | { |
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[632] | 151 | page_t * buddy; // searched buddy block page descriptor |
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| 152 | uint32_t buddy_index; // buddy bloc index in page_tbl[] |
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| 153 | page_t * current; // current (merged) block page descriptor |
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| 154 | uint32_t current_index; // current (merged) block index in page_tbl[] |
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| 155 | uint32_t current_order; // current (merged) block order |
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[7] | 156 | |
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[160] | 157 | ppm_t * ppm = &LOCAL_CLUSTER->ppm; |
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| 158 | page_t * pages_tbl = ppm->pages_tbl; |
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[1] | 159 | |
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[632] | 160 | assert( !page_is_flag( page , PG_FREE ) , |
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| 161 | "page already released : ppn = %x\n" , ppm_page2ppn(XPTR(local_cxy,page)) ); |
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[177] | 162 | |
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[632] | 163 | assert( !page_is_flag( page , PG_RESERVED ) , |
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| 164 | "reserved page : ppn = %x\n" , ppm_page2ppn(XPTR(local_cxy,page)) ); |
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[407] | 165 | |
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[160] | 166 | // update released page descriptor flags |
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[1] | 167 | page_set_flag( page , PG_FREE ); |
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| 168 | |
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[160] | 169 | // search the buddy page descriptor |
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| 170 | // - merge with current page descriptor if found |
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| 171 | // - exit to release the current page descriptor if not found |
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[632] | 172 | current = page; |
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[160] | 173 | current_index = (uint32_t)(page - ppm->pages_tbl); |
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[18] | 174 | for( current_order = page->order ; |
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[160] | 175 | current_order < CONFIG_PPM_MAX_ORDER ; |
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| 176 | current_order++ ) |
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| 177 | { |
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[7] | 178 | buddy_index = current_index ^ (1 << current_order); |
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| 179 | buddy = pages_tbl + buddy_index; |
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[18] | 180 | |
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[632] | 181 | // exit this loop if buddy block not found |
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| 182 | if( !page_is_flag( buddy , PG_FREE ) || |
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| 183 | (buddy->order != current_order) ) break; |
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[1] | 184 | |
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[632] | 185 | // remove buddy block from free_list |
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[7] | 186 | list_unlink( &buddy->list ); |
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[1] | 187 | ppm->free_pages_nr[current_order] --; |
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[18] | 188 | |
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[632] | 189 | // reset order field in buddy block page descriptor |
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[7] | 190 | buddy->order = 0; |
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[632] | 191 | |
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| 192 | // compute merged block index in page_tbl[] |
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[7] | 193 | current_index &= buddy_index; |
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[1] | 194 | } |
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[18] | 195 | |
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[632] | 196 | // update pointer and order field for merged block page descriptor |
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[7] | 197 | current = pages_tbl + current_index; |
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| 198 | current->order = current_order; |
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[1] | 199 | |
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[632] | 200 | // insert merged block in free list |
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[7] | 201 | list_add_first( &ppm->free_pages_root[current_order] , ¤t->list ); |
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[1] | 202 | ppm->free_pages_nr[current_order] ++; |
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| 203 | |
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[433] | 204 | } // end ppm_free_pages_nolock() |
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| 205 | |
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[1] | 206 | //////////////////////////////////////////// |
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| 207 | page_t * ppm_alloc_pages( uint32_t order ) |
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| 208 | { |
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[632] | 209 | page_t * current_block; |
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[160] | 210 | uint32_t current_order; |
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[1] | 211 | uint32_t current_size; |
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[632] | 212 | page_t * found_block; |
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[551] | 213 | |
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[438] | 214 | #if DEBUG_PPM_ALLOC_PAGES |
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[611] | 215 | thread_t * this = CURRENT_THREAD; |
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[433] | 216 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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[438] | 217 | if( DEBUG_PPM_ALLOC_PAGES < cycle ) |
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[632] | 218 | printk("\n[%s] thread[%x,%x] enter for %d page(s) in cluster %x / cycle %d\n", |
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[634] | 219 | __FUNCTION__, this->process->pid, this->trdid, 1<<order, local_cxy, cycle ); |
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[433] | 220 | #endif |
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[1] | 221 | |
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[438] | 222 | #if(DEBUG_PPM_ALLOC_PAGES & 0x1) |
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| 223 | if( DEBUG_PPM_ALLOC_PAGES < cycle ) |
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[632] | 224 | ppm_remote_display( local_cxy ); |
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[433] | 225 | #endif |
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| 226 | |
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[160] | 227 | ppm_t * ppm = &LOCAL_CLUSTER->ppm; |
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[1] | 228 | |
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[611] | 229 | // check order |
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| 230 | assert( (order < CONFIG_PPM_MAX_ORDER) , "illegal order argument = %d\n" , order ); |
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[1] | 231 | |
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[632] | 232 | //build extended pointer on lock protecting remote PPM |
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| 233 | xptr_t lock_xp = XPTR( local_cxy , &ppm->free_lock ); |
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[1] | 234 | |
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[160] | 235 | // take lock protecting free lists |
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[632] | 236 | remote_busylock_acquire( lock_xp ); |
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[1] | 237 | |
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[632] | 238 | current_block = NULL; |
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| 239 | |
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[160] | 240 | // find a free block equal or larger to requested size |
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[1] | 241 | for( current_order = order ; current_order < CONFIG_PPM_MAX_ORDER ; current_order ++ ) |
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| 242 | { |
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| 243 | if( !list_is_empty( &ppm->free_pages_root[current_order] ) ) |
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| 244 | { |
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[632] | 245 | // get first free block in this free_list |
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| 246 | current_block = LIST_FIRST( &ppm->free_pages_root[current_order] , page_t , list ); |
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| 247 | |
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| 248 | // remove this block from this free_list |
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| 249 | list_unlink( ¤t_block->list ); |
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| 250 | |
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| 251 | // register pointer on found block |
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| 252 | found_block = current_block; |
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| 253 | |
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| 254 | // update this free-list number of blocks |
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| 255 | ppm->free_pages_nr[current_order] --; |
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| 256 | |
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| 257 | // compute found block size |
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| 258 | current_size = (1 << current_order); |
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| 259 | |
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| 260 | break; |
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[1] | 261 | } |
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| 262 | } |
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| 263 | |
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[632] | 264 | if( current_block == NULL ) // return failure if no free block found |
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[1] | 265 | { |
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[160] | 266 | // release lock protecting free lists |
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[632] | 267 | remote_busylock_release( lock_xp ); |
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[1] | 268 | |
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[438] | 269 | #if DEBUG_PPM_ALLOC_PAGES |
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[433] | 270 | cycle = (uint32_t)hal_get_cycles(); |
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[438] | 271 | if( DEBUG_PPM_ALLOC_PAGES < cycle ) |
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[632] | 272 | printk("\n[%s] thread[%x,%x] cannot allocate %d page(s) in cluster %x / cycle %d\n", |
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[634] | 273 | __FUNCTION__, this->process->pid, this->trdid, 1<<order, local_cxy, cycle ); |
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[433] | 274 | #endif |
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| 275 | |
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[160] | 276 | return NULL; |
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| 277 | } |
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[18] | 278 | |
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[1] | 279 | |
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[632] | 280 | // split the found block in smaller sub-blocks if required |
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[160] | 281 | // and update the free-lists accordingly |
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[1] | 282 | while( current_order > order ) |
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| 283 | { |
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| 284 | current_order --; |
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[632] | 285 | |
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| 286 | // update pointer, size, and order fiels for new free block |
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[1] | 287 | current_size >>= 1; |
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[632] | 288 | current_block = found_block + current_size; |
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| 289 | current_block->order = current_order; |
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[18] | 290 | |
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[632] | 291 | // insert new free block in relevant free_list |
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| 292 | list_add_first( &ppm->free_pages_root[current_order] , ¤t_block->list ); |
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[1] | 293 | |
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[632] | 294 | // update number of blocks in free list |
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[1] | 295 | ppm->free_pages_nr[current_order] ++; |
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| 296 | } |
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[18] | 297 | |
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[632] | 298 | // update found block page descriptor |
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| 299 | page_clear_flag( found_block , PG_FREE ); |
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| 300 | page_refcount_up( found_block ); |
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| 301 | found_block->order = order; |
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[1] | 302 | |
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[160] | 303 | // release lock protecting free lists |
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[632] | 304 | remote_busylock_release( lock_xp ); |
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[18] | 305 | |
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[585] | 306 | // update DQDT |
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[632] | 307 | dqdt_increment_pages( local_cxy , order ); |
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[585] | 308 | |
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[438] | 309 | #if DEBUG_PPM_ALLOC_PAGES |
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[433] | 310 | cycle = (uint32_t)hal_get_cycles(); |
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[438] | 311 | if( DEBUG_PPM_ALLOC_PAGES < cycle ) |
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[632] | 312 | printk("\n[%s] thread[%x,%x] exit for %d page(s) in cluster %x / ppn = %x / cycle %d\n", |
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[611] | 313 | __FUNCTION__, this->process->pid, this->trdid, |
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[634] | 314 | 1<<order, ppm_page2ppn(XPTR( local_cxy , found_block )), local_cxy, cycle ); |
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[433] | 315 | #endif |
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[7] | 316 | |
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[611] | 317 | #if(DEBUG_PPM_ALLOC_PAGES & 0x1) |
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| 318 | if( DEBUG_PPM_ALLOC_PAGES < cycle ) |
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[632] | 319 | ppm_remote_display( local_cxy ); |
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[611] | 320 | #endif |
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| 321 | |
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[632] | 322 | return found_block; |
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[1] | 323 | |
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[433] | 324 | } // end ppm_alloc_pages() |
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[1] | 325 | |
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[433] | 326 | |
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[1] | 327 | //////////////////////////////////// |
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| 328 | void ppm_free_pages( page_t * page ) |
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| 329 | { |
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| 330 | ppm_t * ppm = &LOCAL_CLUSTER->ppm; |
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[18] | 331 | |
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[438] | 332 | #if DEBUG_PPM_FREE_PAGES |
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[632] | 333 | thread_t * this = CURRENT_THREAD; |
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| 334 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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[438] | 335 | if( DEBUG_PPM_FREE_PAGES < cycle ) |
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[632] | 336 | printk("\n[%s] thread[%x,%x] enter for %d page(s) in cluster %x / ppn %x / cycle %d\n", |
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[611] | 337 | __FUNCTION__, this->process->pid, this->trdid, |
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[632] | 338 | 1<<page->order, local_cxy, ppm_page2ppn(XPTR(local_cxy , page)), cycle ); |
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[433] | 339 | #endif |
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| 340 | |
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[438] | 341 | #if(DEBUG_PPM_FREE_PAGES & 0x1) |
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| 342 | if( DEBUG_PPM_FREE_PAGES < cycle ) |
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[632] | 343 | ppm_remote_display( local_cxy ); |
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[433] | 344 | #endif |
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| 345 | |
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[632] | 346 | //build extended pointer on lock protecting free_lists |
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| 347 | xptr_t lock_xp = XPTR( local_cxy , &ppm->free_lock ); |
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| 348 | |
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[160] | 349 | // get lock protecting free_pages[] array |
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[632] | 350 | remote_busylock_acquire( lock_xp ); |
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[1] | 351 | |
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[18] | 352 | ppm_free_pages_nolock( page ); |
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[1] | 353 | |
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[632] | 354 | // release lock protecting free_lists |
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| 355 | remote_busylock_release( lock_xp ); |
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[433] | 356 | |
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[585] | 357 | // update DQDT |
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[632] | 358 | dqdt_decrement_pages( local_cxy , page->order ); |
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[585] | 359 | |
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[438] | 360 | #if DEBUG_PPM_FREE_PAGES |
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[433] | 361 | cycle = (uint32_t)hal_get_cycles(); |
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[438] | 362 | if( DEBUG_PPM_FREE_PAGES < cycle ) |
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[632] | 363 | printk("\n[%s] thread[%x,%x] exit for %d page(s) in cluster %x / ppn %x / cycle %d\n", |
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[611] | 364 | __FUNCTION__, this->process->pid, this->trdid, |
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[632] | 365 | 1<<page->order, local_cxy, ppm_page2ppn(XPTR(local_cxy , page)) , cycle ); |
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[433] | 366 | #endif |
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| 367 | |
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[611] | 368 | #if(DEBUG_PPM_FREE_PAGES & 0x1) |
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| 369 | if( DEBUG_PPM_FREE_PAGES < cycle ) |
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[632] | 370 | ppm_remote_display( local_cxy ); |
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[611] | 371 | #endif |
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| 372 | |
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[567] | 373 | } // end ppm_free_pages() |
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[1] | 374 | |
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[632] | 375 | ///////////////////////////////////////////// |
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| 376 | xptr_t ppm_remote_alloc_pages( cxy_t cxy, |
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| 377 | uint32_t order ) |
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[1] | 378 | { |
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[632] | 379 | uint32_t current_order; |
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| 380 | uint32_t current_size; |
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| 381 | page_t * current_block; |
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| 382 | page_t * found_block; |
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| 383 | |
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[634] | 384 | #if DEBUG_PPM_REMOTE_ALLOC_PAGES |
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[632] | 385 | thread_t * this = CURRENT_THREAD; |
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| 386 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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[634] | 387 | if( DEBUG_PPM_REMOTE_ALLOC_PAGES < cycle ) |
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[632] | 388 | printk("\n[%s] thread[%x,%x] enter for %d small page(s) in cluster %x / cycle %d\n", |
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| 389 | __FUNCTION__, this->process->pid, this->trdid, 1<<order, cxy, cycle ); |
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| 390 | #endif |
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| 391 | |
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[634] | 392 | #if(DEBUG_PPM_REMOTE_ALLOC_PAGES & 0x1) |
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| 393 | if( DEBUG_PPM_REMOTE_ALLOC_PAGES < cycle ) |
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[632] | 394 | ppm_remote_display( cxy ); |
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| 395 | #endif |
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| 396 | |
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| 397 | // check order |
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| 398 | assert( (order < CONFIG_PPM_MAX_ORDER) , "illegal order argument = %d\n" , order ); |
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| 399 | |
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| 400 | // get local pointer on PPM (same in all clusters) |
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| 401 | ppm_t * ppm = &LOCAL_CLUSTER->ppm; |
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| 402 | |
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| 403 | //build extended pointer on lock protecting remote PPM |
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| 404 | xptr_t lock_xp = XPTR( cxy , &ppm->free_lock ); |
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| 405 | |
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| 406 | // take lock protecting free lists in remote cluster |
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| 407 | remote_busylock_acquire( lock_xp ); |
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| 408 | |
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| 409 | current_block = NULL; |
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| 410 | |
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| 411 | // find in remote cluster a free block equal or larger to requested size |
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| 412 | for( current_order = order ; current_order < CONFIG_PPM_MAX_ORDER ; current_order ++ ) |
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| 413 | { |
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| 414 | // get local pointer on the root of relevant free_list in remote cluster |
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| 415 | list_entry_t * root = &ppm->free_pages_root[current_order]; |
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| 416 | |
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| 417 | if( !list_remote_is_empty( cxy , root ) ) |
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| 418 | { |
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| 419 | // get local pointer on first free page descriptor in remote cluster |
---|
| 420 | current_block = LIST_REMOTE_FIRST( cxy, root , page_t , list ); |
---|
| 421 | |
---|
| 422 | // remove first free page from the free-list in remote cluster |
---|
| 423 | list_remote_unlink( cxy , ¤t_block->list ); |
---|
| 424 | |
---|
| 425 | // register found block |
---|
| 426 | found_block = current_block; |
---|
| 427 | |
---|
| 428 | // decrement relevant free-list number of items in remote cluster |
---|
| 429 | hal_remote_atomic_add( XPTR( cxy , &ppm->free_pages_nr[current_order] ), -1 ); |
---|
| 430 | |
---|
| 431 | // compute found block size |
---|
| 432 | current_size = (1 << current_order); |
---|
| 433 | |
---|
| 434 | break; |
---|
| 435 | } |
---|
| 436 | } |
---|
| 437 | |
---|
| 438 | if( current_block == NULL ) // return failure |
---|
| 439 | { |
---|
| 440 | // release lock protecting free lists |
---|
| 441 | remote_busylock_release( lock_xp ); |
---|
| 442 | |
---|
[634] | 443 | #if DEBUG_REMOTE_PPM_ALLOC_PAGES |
---|
[632] | 444 | cycle = (uint32_t)hal_get_cycles(); |
---|
[634] | 445 | if( DEBUG_PPM_REMOTE_ALLOC_PAGES < cycle ) |
---|
[632] | 446 | printk("\n[%s] thread[%x,%x] cannot allocate %d page(s) in cluster %x / cycle %d\n", |
---|
| 447 | __FUNCTION__, this->process->pid, this->trdid, 1<<order, cxy, cycle ); |
---|
| 448 | #endif |
---|
| 449 | |
---|
| 450 | return XPTR_NULL; |
---|
| 451 | } |
---|
| 452 | |
---|
| 453 | // split the found block in smaller sub-blocks if required |
---|
| 454 | // and update the free-lists accordingly in remote cluster |
---|
| 455 | while( current_order > order ) |
---|
| 456 | { |
---|
| 457 | // update order, size, and local pointer for new free block |
---|
| 458 | current_order --; |
---|
| 459 | current_size >>= 1; |
---|
| 460 | current_block = found_block + current_size; |
---|
| 461 | |
---|
| 462 | // update new free block order field in remote cluster |
---|
| 463 | hal_remote_s32( XPTR( cxy , ¤t_block->order ) , current_order ); |
---|
| 464 | |
---|
| 465 | // get local pointer on the root of the relevant free_list in remote cluster |
---|
| 466 | list_entry_t * root = &ppm->free_pages_root[current_order]; |
---|
| 467 | |
---|
| 468 | // insert new free block in this free_list |
---|
| 469 | list_remote_add_first( cxy , root, ¤t_block->list ); |
---|
| 470 | |
---|
| 471 | // update free-list number of items in remote cluster |
---|
| 472 | hal_remote_atomic_add( XPTR(cxy , &ppm->free_pages_nr[current_order]), 1 ); |
---|
| 473 | } |
---|
| 474 | |
---|
[634] | 475 | // update refcount, flags and order fields in found block |
---|
[632] | 476 | page_remote_clear_flag( XPTR( cxy , found_block ), PG_FREE ); |
---|
| 477 | page_remote_refcount_up( XPTR( cxy , found_block ) ); |
---|
| 478 | hal_remote_s32( XPTR( cxy , &found_block->order ) , order ); |
---|
| 479 | |
---|
| 480 | // release lock protecting free lists in remote cluster |
---|
| 481 | remote_busylock_release( lock_xp ); |
---|
| 482 | |
---|
| 483 | // update DQDT page counter in remote cluster |
---|
| 484 | dqdt_increment_pages( cxy , order ); |
---|
| 485 | |
---|
[634] | 486 | #if DEBUG_PPM_REMOTE_ALLOC_PAGES |
---|
[632] | 487 | cycle = (uint32_t)hal_get_cycles(); |
---|
[634] | 488 | if( DEBUG_PPM_REMOTE_ALLOC_PAGES < cycle ) |
---|
[632] | 489 | printk("\n[%s] thread[%x,%x] exit for %d page(s) / ppn = %x in cluster %x / cycle %d\n", |
---|
| 490 | __FUNCTION__, this->process->pid, this->trdid, |
---|
| 491 | 1<<order, ppm_page2ppn(XPTR( local_cxy , found_block )), cxy, cycle ); |
---|
| 492 | #endif |
---|
| 493 | |
---|
[634] | 494 | #if(DEBUG_PPM_REMOTE_ALLOC_PAGES & 0x1) |
---|
| 495 | if( DEBUG_PPM_REMOTE_ALLOC_PAGES < cycle ) |
---|
[632] | 496 | ppm_remote_display( cxy ); |
---|
| 497 | #endif |
---|
| 498 | |
---|
| 499 | return XPTR( cxy , found_block ); |
---|
| 500 | |
---|
| 501 | } // end ppm_remote_alloc_pages() |
---|
| 502 | |
---|
| 503 | ////////////////////////////////////////// |
---|
| 504 | void ppm_remote_free_pages( cxy_t cxy, |
---|
| 505 | page_t * page ) |
---|
| 506 | { |
---|
| 507 | xptr_t page_xp; // extended pointer on released page descriptor |
---|
| 508 | uint32_t order; // released block order |
---|
| 509 | page_t * buddy_ptr; // searched buddy block page descriptor |
---|
| 510 | uint32_t buddy_order; // searched buddy block order |
---|
| 511 | uint32_t buddy_index; // buddy block index in page_tbl[] |
---|
| 512 | page_t * current_ptr; // current (merged) block page descriptor |
---|
| 513 | uint32_t current_index; // current (merged) block index in page_tbl[] |
---|
| 514 | uint32_t current_order; // current (merged) block order |
---|
| 515 | |
---|
[634] | 516 | #if DEBUG_PPM_REMOTE_FREE_PAGES |
---|
[632] | 517 | thread_t * this = CURRENT_THREAD; |
---|
| 518 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
[634] | 519 | if( DEBUG_PPM_REMOTE_FREE_PAGES < cycle ) |
---|
| 520 | printk("\n[%s] thread[%x,%x] enter for %d page(s) / cxy %x / ppn %x / cycle %d\n", |
---|
[632] | 521 | __FUNCTION__, this->process->pid, this->trdid, |
---|
| 522 | 1<<page->order, cxy, ppm_page2ppn(XPTR(cxy , page)), cycle ); |
---|
| 523 | #endif |
---|
| 524 | |
---|
[634] | 525 | #if(DEBUG_PPM_REMOTE_FREE_PAGES & 0x1) |
---|
| 526 | if( DEBUG_PPM_REMOTE_FREE_PAGES < cycle ) |
---|
[632] | 527 | ppm_remote_display( cxy ); |
---|
| 528 | #endif |
---|
| 529 | |
---|
| 530 | // build extended pointer on released page descriptor |
---|
| 531 | page_xp = XPTR( cxy , page ); |
---|
| 532 | |
---|
| 533 | // get released page order |
---|
| 534 | order = hal_remote_l32( XPTR( cxy , &page->order ) ); |
---|
| 535 | |
---|
| 536 | // get local pointer on PPM (same in all clusters) |
---|
| 537 | ppm_t * ppm = &LOCAL_CLUSTER->ppm; |
---|
| 538 | |
---|
| 539 | // build extended pointer on lock protecting remote PPM |
---|
| 540 | xptr_t lock_xp = XPTR( cxy , &ppm->free_lock ); |
---|
| 541 | |
---|
| 542 | // get local pointer on remote PPM page_tbl[] array |
---|
| 543 | page_t * pages_tbl = hal_remote_lpt( XPTR( cxy , &ppm->pages_tbl ) ); |
---|
| 544 | |
---|
| 545 | // get lock protecting free_pages in remote cluster |
---|
| 546 | remote_busylock_acquire( lock_xp ); |
---|
| 547 | |
---|
| 548 | assert( !page_remote_is_flag( page_xp , PG_FREE ) , |
---|
| 549 | "page already released : ppn = %x\n" , ppm_page2ppn(XPTR(local_cxy,page)) ); |
---|
| 550 | |
---|
| 551 | assert( !page_remote_is_flag( page_xp , PG_RESERVED ) , |
---|
| 552 | "reserved page : ppn = %x\n" , ppm_page2ppn(XPTR(local_cxy,page)) ); |
---|
| 553 | |
---|
| 554 | // update released page descriptor flags |
---|
| 555 | page_remote_set_flag( page_xp , PG_FREE ); |
---|
| 556 | |
---|
| 557 | // search the buddy page descriptor |
---|
| 558 | // - merge with current page descriptor if found |
---|
| 559 | // - exit to release the current page descriptor if not found |
---|
| 560 | current_ptr = page; |
---|
| 561 | current_index = (uint32_t)(page - ppm->pages_tbl); |
---|
| 562 | for( current_order = order ; |
---|
| 563 | current_order < CONFIG_PPM_MAX_ORDER ; |
---|
| 564 | current_order++ ) |
---|
| 565 | { |
---|
| 566 | buddy_index = current_index ^ (1 << current_order); |
---|
| 567 | buddy_ptr = pages_tbl + buddy_index; |
---|
| 568 | |
---|
| 569 | // get buddy block order |
---|
| 570 | buddy_order = hal_remote_l32( XPTR( cxy , &buddy_ptr->order ) ); |
---|
| 571 | |
---|
| 572 | // exit loop if buddy block not found |
---|
| 573 | if( !page_remote_is_flag( XPTR( cxy , buddy_ptr ) , PG_FREE ) || |
---|
| 574 | (buddy_order != current_order) ) break; |
---|
| 575 | |
---|
| 576 | // remove buddy from free list in remote cluster |
---|
| 577 | list_remote_unlink( cxy , &buddy_ptr->list ); |
---|
| 578 | hal_remote_atomic_add( XPTR( cxy , &ppm->free_pages_nr[current_order] ) , -1 ); |
---|
| 579 | |
---|
| 580 | // reset order field in buddy block page descriptor |
---|
| 581 | hal_remote_s32( XPTR( cxy , &buddy_ptr->order ) , 0 ); |
---|
| 582 | |
---|
| 583 | // compute merged block index in page_tbl[] array |
---|
| 584 | current_index &= buddy_index; |
---|
| 585 | } |
---|
| 586 | |
---|
| 587 | // update merged page descriptor order field |
---|
| 588 | current_ptr = pages_tbl + current_index; |
---|
| 589 | hal_remote_s32( XPTR( cxy , ¤t_ptr->order ) , current_order ); |
---|
| 590 | |
---|
| 591 | // insert merged block into relevant free list in remote cluster |
---|
| 592 | list_remote_add_first( cxy , &ppm->free_pages_root[current_order] , ¤t_ptr->list ); |
---|
| 593 | hal_remote_atomic_add( XPTR( cxy , &ppm->free_pages_nr[current_order] ) , 1 ); |
---|
| 594 | |
---|
| 595 | // release lock protecting free_pages[] array |
---|
| 596 | remote_busylock_release( lock_xp ); |
---|
| 597 | |
---|
| 598 | // update DQDT |
---|
| 599 | dqdt_decrement_pages( cxy , page->order ); |
---|
| 600 | |
---|
[634] | 601 | #if DEBUG_PPM_REMOTE_FREE_PAGES |
---|
[632] | 602 | cycle = (uint32_t)hal_get_cycles(); |
---|
[634] | 603 | if( DEBUG_PPM_REMOTE_FREE_PAGES < cycle ) |
---|
[632] | 604 | printk("\n[%s] thread[%x,%x] exit for %d page(s) in cluster %x / ppn %x / cycle %d\n", |
---|
| 605 | __FUNCTION__, this->process->pid, this->trdid, |
---|
| 606 | 1<<page->order, cxy, ppm_page2ppn(XPTR(cxy , page)), cycle ); |
---|
| 607 | #endif |
---|
| 608 | |
---|
[634] | 609 | #if(DEBUG_PPM_REMOTE_FREE_PAGES & 0x1) |
---|
| 610 | if( DEBUG_PPM_REMOTE_FREE_PAGES < cycle ) |
---|
[632] | 611 | ppm_remote_display( cxy ); |
---|
| 612 | #endif |
---|
| 613 | |
---|
| 614 | } // end ppm_remote_free_pages() |
---|
| 615 | |
---|
| 616 | //////////////////////////////////// |
---|
| 617 | void ppm_remote_display( cxy_t cxy ) |
---|
| 618 | { |
---|
[1] | 619 | uint32_t order; |
---|
| 620 | list_entry_t * iter; |
---|
[634] | 621 | xptr_t page_xp; |
---|
[1] | 622 | |
---|
[433] | 623 | ppm_t * ppm = &LOCAL_CLUSTER->ppm; |
---|
| 624 | |
---|
[632] | 625 | // build extended pointer on lock protecting remote PPM |
---|
[634] | 626 | xptr_t ppm_lock_xp = XPTR( cxy , &ppm->free_lock ); |
---|
[1] | 627 | |
---|
[634] | 628 | // get pointers on TXT0 chdev |
---|
| 629 | xptr_t txt0_xp = chdev_dir.txt_tx[0]; |
---|
| 630 | cxy_t txt0_cxy = GET_CXY( txt0_xp ); |
---|
| 631 | chdev_t * txt0_ptr = GET_PTR( txt0_xp ); |
---|
[632] | 632 | |
---|
[634] | 633 | // build extended pointer on remote TXT0 lock |
---|
| 634 | xptr_t txt_lock_xp = XPTR( txt0_cxy , &txt0_ptr->wait_lock ); |
---|
[18] | 635 | |
---|
[634] | 636 | // get PPM lock |
---|
| 637 | remote_busylock_acquire( ppm_lock_xp ); |
---|
| 638 | |
---|
| 639 | // get TXT0 lock |
---|
| 640 | remote_busylock_acquire( txt_lock_xp ); |
---|
| 641 | |
---|
| 642 | nolock_printk("\n***** PPM in cluster %x / %d pages\n", local_cxy , ppm->pages_nr ); |
---|
| 643 | |
---|
[1] | 644 | for( order = 0 ; order < CONFIG_PPM_MAX_ORDER ; order++ ) |
---|
| 645 | { |
---|
[632] | 646 | // get number of free pages for free_list[order] in remote cluster |
---|
| 647 | uint32_t n = hal_remote_l32( XPTR( cxy , &ppm->free_pages_nr[order] ) ); |
---|
[18] | 648 | |
---|
[634] | 649 | nolock_printk("- order = %d / n = %d\t: ", order , n ); |
---|
| 650 | |
---|
[632] | 651 | LIST_REMOTE_FOREACH( cxy , &ppm->free_pages_root[order] , iter ) |
---|
[1] | 652 | { |
---|
[634] | 653 | // build extended pointer on page descriptor |
---|
| 654 | page_xp = XPTR( cxy , LIST_ELEMENT( iter , page_t , list ) ); |
---|
| 655 | |
---|
| 656 | // display PPN |
---|
| 657 | nolock_printk("%x," , ppm_page2ppn( page_xp ) ); |
---|
[1] | 658 | } |
---|
[18] | 659 | |
---|
[634] | 660 | nolock_printk("\n"); |
---|
[1] | 661 | } |
---|
| 662 | |
---|
[634] | 663 | // release TXT0 lock |
---|
| 664 | remote_busylock_release( txt_lock_xp ); |
---|
| 665 | |
---|
| 666 | // release PPM lock |
---|
| 667 | remote_busylock_release( ppm_lock_xp ); |
---|
[160] | 668 | } |
---|
[1] | 669 | |
---|
[632] | 670 | //////////////////////////////// |
---|
| 671 | error_t ppm_assert_order( void ) |
---|
[1] | 672 | { |
---|
| 673 | uint32_t order; |
---|
| 674 | list_entry_t * iter; |
---|
| 675 | page_t * page; |
---|
[18] | 676 | |
---|
[632] | 677 | ppm_t * ppm = &LOCAL_CLUSTER->ppm; |
---|
| 678 | |
---|
[407] | 679 | for( order=0 ; order < CONFIG_PPM_MAX_ORDER ; order++ ) |
---|
[1] | 680 | { |
---|
| 681 | if( list_is_empty( &ppm->free_pages_root[order] ) ) continue; |
---|
[18] | 682 | |
---|
[1] | 683 | LIST_FOREACH( &ppm->free_pages_root[order] , iter ) |
---|
| 684 | { |
---|
| 685 | page = LIST_ELEMENT( iter , page_t , list ); |
---|
[160] | 686 | if( page->order != order ) return -1; |
---|
[1] | 687 | } |
---|
| 688 | } |
---|
| 689 | |
---|
[160] | 690 | return 0; |
---|
| 691 | } |
---|
[53] | 692 | |
---|
[567] | 693 | |
---|
| 694 | ////////////////////////////////////////////////////////////////////////////////////// |
---|
| 695 | // functions to handle dirty physical pages |
---|
| 696 | ////////////////////////////////////////////////////////////////////////////////////// |
---|
| 697 | |
---|
[606] | 698 | ////////////////////////////////////////// |
---|
| 699 | bool_t ppm_page_do_dirty( xptr_t page_xp ) |
---|
[567] | 700 | { |
---|
| 701 | bool_t done = false; |
---|
| 702 | |
---|
[606] | 703 | // get page cluster and local pointer |
---|
| 704 | page_t * page_ptr = GET_PTR( page_xp ); |
---|
| 705 | cxy_t page_cxy = GET_CXY( page_xp ); |
---|
| 706 | |
---|
| 707 | // get local pointer on PPM (same in all clusters) |
---|
[567] | 708 | ppm_t * ppm = &LOCAL_CLUSTER->ppm; |
---|
| 709 | |
---|
[606] | 710 | // build extended pointers on page lock, page flags, and PPM dirty list lock |
---|
| 711 | xptr_t page_lock_xp = XPTR( page_cxy , &page_ptr->lock ); |
---|
| 712 | xptr_t page_flags_xp = XPTR( page_cxy , &page_ptr->flags ); |
---|
| 713 | xptr_t dirty_lock_xp = XPTR( page_cxy , &ppm->dirty_lock ); |
---|
| 714 | |
---|
| 715 | // lock the remote PPM dirty_list |
---|
| 716 | remote_queuelock_acquire( dirty_lock_xp ); |
---|
[567] | 717 | |
---|
[606] | 718 | // lock the remote page |
---|
| 719 | remote_busylock_acquire( page_lock_xp ); |
---|
| 720 | |
---|
| 721 | // get remote page flags |
---|
| 722 | uint32_t flags = hal_remote_l32( page_flags_xp ); |
---|
| 723 | |
---|
| 724 | if( (flags & PG_DIRTY) == 0 ) |
---|
[567] | 725 | { |
---|
| 726 | // set dirty flag in page descriptor |
---|
[606] | 727 | hal_remote_s32( page_flags_xp , flags | PG_DIRTY ); |
---|
[567] | 728 | |
---|
[632] | 729 | // insert the page in the remote dirty list |
---|
| 730 | list_remote_add_first( page_cxy , &ppm->dirty_root , &page_ptr->list ); |
---|
[606] | 731 | |
---|
[567] | 732 | done = true; |
---|
| 733 | } |
---|
| 734 | |
---|
[606] | 735 | // unlock the remote page |
---|
| 736 | remote_busylock_release( page_lock_xp ); |
---|
[567] | 737 | |
---|
[606] | 738 | // unlock the remote PPM dirty_list |
---|
| 739 | remote_queuelock_release( dirty_lock_xp ); |
---|
| 740 | |
---|
[567] | 741 | return done; |
---|
| 742 | |
---|
[606] | 743 | } // end ppm_page_do_dirty() |
---|
| 744 | |
---|
| 745 | //////////////////////////////////////////// |
---|
| 746 | bool_t ppm_page_undo_dirty( xptr_t page_xp ) |
---|
[567] | 747 | { |
---|
| 748 | bool_t done = false; |
---|
| 749 | |
---|
[606] | 750 | // get page cluster and local pointer |
---|
| 751 | page_t * page_ptr = GET_PTR( page_xp ); |
---|
| 752 | cxy_t page_cxy = GET_CXY( page_xp ); |
---|
| 753 | |
---|
| 754 | // get local pointer on PPM (same in all clusters) |
---|
[567] | 755 | ppm_t * ppm = &LOCAL_CLUSTER->ppm; |
---|
| 756 | |
---|
[606] | 757 | // build extended pointers on page lock, page flags, and PPM dirty list lock |
---|
| 758 | xptr_t page_lock_xp = XPTR( page_cxy , &page_ptr->lock ); |
---|
| 759 | xptr_t page_flags_xp = XPTR( page_cxy , &page_ptr->flags ); |
---|
| 760 | xptr_t dirty_lock_xp = XPTR( page_cxy , &ppm->dirty_lock ); |
---|
| 761 | |
---|
| 762 | // lock the remote PPM dirty_list |
---|
| 763 | remote_queuelock_acquire( XPTR( page_cxy , &ppm->dirty_lock ) ); |
---|
[567] | 764 | |
---|
[606] | 765 | // lock the remote page |
---|
| 766 | remote_busylock_acquire( page_lock_xp ); |
---|
| 767 | |
---|
| 768 | // get remote page flags |
---|
| 769 | uint32_t flags = hal_remote_l32( page_flags_xp ); |
---|
| 770 | |
---|
| 771 | if( (flags & PG_DIRTY) ) // page is dirty |
---|
[567] | 772 | { |
---|
[606] | 773 | // reset dirty flag in page descriptor |
---|
| 774 | hal_remote_s32( page_flags_xp , flags & (~PG_DIRTY) ); |
---|
[567] | 775 | |
---|
[632] | 776 | // remove the page from remote dirty list |
---|
| 777 | list_remote_unlink( page_cxy , &page_ptr->list ); |
---|
[606] | 778 | |
---|
[567] | 779 | done = true; |
---|
| 780 | } |
---|
| 781 | |
---|
[606] | 782 | // unlock the remote page |
---|
| 783 | remote_busylock_release( page_lock_xp ); |
---|
[567] | 784 | |
---|
[606] | 785 | // unlock the remote PPM dirty_list |
---|
| 786 | remote_queuelock_release( dirty_lock_xp ); |
---|
| 787 | |
---|
[567] | 788 | return done; |
---|
| 789 | |
---|
[606] | 790 | } // end ppm_page_undo_dirty() |
---|
| 791 | |
---|
| 792 | ///////////////////////////////// |
---|
| 793 | void ppm_sync_dirty_pages( void ) |
---|
[567] | 794 | { |
---|
[606] | 795 | ppm_t * ppm = &LOCAL_CLUSTER->ppm; |
---|
[567] | 796 | |
---|
[606] | 797 | // get local pointer on PPM dirty_root |
---|
| 798 | list_entry_t * dirty_root = &ppm->dirty_root; |
---|
| 799 | |
---|
| 800 | // build extended pointer on PPM dirty_lock |
---|
| 801 | xptr_t dirty_lock_xp = XPTR( local_cxy , &ppm->dirty_lock ); |
---|
| 802 | |
---|
[567] | 803 | // get the PPM dirty_list lock |
---|
[606] | 804 | remote_queuelock_acquire( dirty_lock_xp ); |
---|
[567] | 805 | |
---|
| 806 | while( !list_is_empty( &ppm->dirty_root ) ) |
---|
| 807 | { |
---|
[606] | 808 | page_t * page = LIST_FIRST( dirty_root , page_t , list ); |
---|
| 809 | xptr_t page_xp = XPTR( local_cxy , page ); |
---|
[567] | 810 | |
---|
[606] | 811 | // build extended pointer on page lock |
---|
| 812 | xptr_t page_lock_xp = XPTR( local_cxy , &page->lock ); |
---|
| 813 | |
---|
[567] | 814 | // get the page lock |
---|
[606] | 815 | remote_busylock_acquire( page_lock_xp ); |
---|
[567] | 816 | |
---|
| 817 | // sync the page |
---|
[606] | 818 | vfs_fs_move_page( page_xp , false ); // from mapper to device |
---|
[567] | 819 | |
---|
| 820 | // release the page lock |
---|
[606] | 821 | remote_busylock_release( page_lock_xp ); |
---|
[567] | 822 | } |
---|
| 823 | |
---|
| 824 | // release the PPM dirty_list lock |
---|
[606] | 825 | remote_queuelock_release( dirty_lock_xp ); |
---|
[567] | 826 | |
---|
[606] | 827 | } // end ppm_sync_dirty_pages() |
---|
| 828 | |
---|