2 * Copyright (c) 2018 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
17 #include <sys/types.h>
18 #include <sys/mount.h>
20 #include <sys/fcntl.h>
24 #include <vppinfra/linux/sysfs.h>
25 #include <vlib/vlib.h>
26 #include <vlib/physmem.h>
27 #include <vlib/unix/unix.h>
28 #include <vlib/pci/pci.h>
29 #include <vlib/linux/vfio.h>
31 #if defined(__x86_64__) && !defined(CLIB_SANITIZE_ADDR)
32 /* we keep physmem in low 38 bits of VA address space as some
33 IOMMU implamentation cannot map above that range */
34 #define VLIB_PHYSMEM_DEFAULT_BASE_ADDDR (1ULL << 36)
36 /* let kernel decide */
37 #define VLIB_PHYSMEM_DEFAULT_BASE_ADDDR 0
41 vlib_physmem_shared_map_create (vlib_main_t * vm, char *name, uword size,
42 u32 log2_page_sz, u32 numa_node,
45 clib_pmalloc_main_t *pm = vm->physmem_main.pmalloc_main;
46 vlib_physmem_main_t *vpm = &vm->physmem_main;
47 vlib_physmem_map_t *map;
48 clib_pmalloc_arena_t *a;
49 clib_error_t *error = 0;
53 va = clib_pmalloc_create_shared_arena (pm, name, size, log2_page_sz,
57 return clib_error_return (0, "%U", format_clib_error,
58 clib_pmalloc_last_error (pm));
60 a = clib_pmalloc_get_arena (pm, va);
62 pool_get (vpm->maps, map);
63 *map_index = map->index = map - vpm->maps;
66 map->n_pages = a->n_pages * a->subpages_per_page;
67 map->log2_page_size = a->log2_subpage_sz;
68 map->numa_node = a->numa_node;
70 for (i = 0; i < a->n_pages; i++)
73 clib_pmalloc_get_pa (pm, (u8 *) va + (i << a->log2_subpage_sz));
77 pa = pointer_to_uword (va);
79 vec_add1 (map->page_table, pa);
86 vlib_physmem_get_map (vlib_main_t * vm, u32 index)
88 vlib_physmem_main_t *vpm = &vm->physmem_main;
89 return pool_elt_at_index (vpm->maps, index);
93 vlib_physmem_init (vlib_main_t * vm)
95 vlib_physmem_main_t *vpm = &vm->physmem_main;
96 clib_error_t *error = 0;
100 /* check if pagemap is accessible */
101 pt = clib_mem_vm_get_paddr (&pt, min_log2 (sysconf (_SC_PAGESIZE)), 1);
103 vpm->flags |= VLIB_PHYSMEM_MAIN_F_HAVE_PAGEMAP;
106 if ((error = linux_vfio_init (vm)))
109 p = clib_mem_alloc_aligned (sizeof (clib_pmalloc_main_t),
110 CLIB_CACHE_LINE_BYTES);
111 memset (p, 0, sizeof (clib_pmalloc_main_t));
112 vpm->pmalloc_main = (clib_pmalloc_main_t *) p;
114 if (vpm->base_addr == 0)
115 vpm->base_addr = VLIB_PHYSMEM_DEFAULT_BASE_ADDDR;
117 clib_pmalloc_init (vpm->pmalloc_main, vpm->base_addr, vpm->max_size);
119 /* update base_addr and max_size per actual allocation */
120 vpm->base_addr = (uword) vpm->pmalloc_main->base;
121 vpm->max_size = (uword) vpm->pmalloc_main->max_pages <<
122 vpm->pmalloc_main->def_log2_page_sz;
127 static clib_error_t *
128 show_physmem (vlib_main_t * vm,
129 unformat_input_t * input, vlib_cli_command_t * cmd)
131 vlib_physmem_main_t *vpm = &vm->physmem_main;
132 unformat_input_t _line_input, *line_input = &_line_input;
133 u32 verbose = 0, map = 0;
135 if (unformat_user (input, unformat_line_input, line_input))
137 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
139 if (unformat (line_input, "verbose"))
141 else if (unformat (line_input, "v"))
143 else if (unformat (line_input, "detail"))
145 else if (unformat (line_input, "d"))
147 else if (unformat (line_input, "map"))
152 unformat_free (line_input);
156 vlib_cli_output (vm, " %U", format_pmalloc_map, vpm->pmalloc_main);
158 vlib_cli_output (vm, " %U", format_pmalloc, vpm->pmalloc_main, verbose);
164 VLIB_CLI_COMMAND (show_physmem_command, static) = {
165 .path = "show physmem",
166 .short_help = "show physmem [verbose | detail | map]",
167 .function = show_physmem,
171 static clib_error_t *
172 vlib_physmem_config (vlib_main_t * vm, unformat_input_t * input)
174 vlib_physmem_main_t *vpm = &vm->physmem_main;
176 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
178 if (unformat (input, "base-addr 0x%lx", &vpm->base_addr))
180 else if (unformat (input, "max-size %U",
181 unformat_memory_size, &vpm->max_size))
184 return unformat_parse_error (input);
187 unformat_free (input);
191 VLIB_EARLY_CONFIG_FUNCTION (vlib_physmem_config, "physmem");
194 * fd.io coding-style-patch-verification: ON
197 * eval: (c-set-style "gnu")