From 49d66f1f42cbc310e4fa0dc526b9fdb91d0ca220 Mon Sep 17 00:00:00 2001 From: Damjan Marion Date: Thu, 20 Jul 2017 18:10:35 +0200 Subject: vlib physmem rework This patch adds supprot support for multiple numa-aware physmem regions. Change-Id: I5c69a6f4da33c8ee21bdb8604d52fd2886f2327e Signed-off-by: Damjan Marion --- src/vlib/physmem_funcs.h | 161 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 161 insertions(+) create mode 100644 src/vlib/physmem_funcs.h (limited to 'src/vlib/physmem_funcs.h') diff --git a/src/vlib/physmem_funcs.h b/src/vlib/physmem_funcs.h new file mode 100644 index 00000000000..dbb8d9de5b7 --- /dev/null +++ b/src/vlib/physmem_funcs.h @@ -0,0 +1,161 @@ +/* + * Copyright (c) 2015 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +/* + * physmem.h: virtual <-> physical memory mapping for VLIB buffers + * + * Copyright (c) 2008 Eliot Dresselhaus + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sublicense, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE + * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION + * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION + * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + +#ifndef included_vlib_physmem_funcs_h +#define included_vlib_physmem_funcs_h + +always_inline vlib_physmem_region_t * +vlib_physmem_get_region (vlib_main_t * vm, u8 index) +{ + vlib_physmem_main_t *vpm = &vm->physmem_main; + return pool_elt_at_index (vpm->regions, index); +} + +always_inline u64 +vlib_physmem_offset_to_physical (vlib_main_t * vm, + vlib_physmem_region_index_t idx, uword o) +{ + vlib_physmem_region_t *pr = vlib_physmem_get_region (vm, idx); + uword page_index = o >> pr->log2_page_size; + ASSERT (o < pr->size); + ASSERT (pr->page_table[page_index] != 0); + return (vec_elt (pr->page_table, page_index) + (o & pr->page_mask)); +} + +always_inline int +vlib_physmem_is_virtual (vlib_main_t * vm, vlib_physmem_region_index_t idx, + uword p) +{ + vlib_physmem_region_t *pr = vlib_physmem_get_region (vm, idx); + return p >= pointer_to_uword (pr->mem) + && p < (pointer_to_uword (pr->mem) + pr->size); +} + +always_inline uword +vlib_physmem_offset_of (vlib_main_t * vm, vlib_physmem_region_index_t idx, + void *p) +{ + vlib_physmem_region_t *pr = vlib_physmem_get_region (vm, idx); + uword a = pointer_to_uword (p); + uword o; + + ASSERT (vlib_physmem_is_virtual (vm, idx, a)); + o = a - pointer_to_uword (pr->mem); + + /* Offset must fit in 32 bits. */ + ASSERT ((uword) o == a - pointer_to_uword (pr->mem)); + + return o; +} + +always_inline void * +vlib_physmem_at_offset (vlib_main_t * vm, vlib_physmem_region_index_t idx, + uword offset) +{ + vlib_physmem_region_t *pr = vlib_physmem_get_region (vm, idx); + ASSERT (offset < pr->size); + return uword_to_pointer (pointer_to_uword (pr->mem) + offset, void *); +} + +always_inline void * +vlib_physmem_alloc_aligned (vlib_main_t * vm, vlib_physmem_region_index_t idx, + clib_error_t ** error, + uword n_bytes, uword alignment) +{ + void *r = vm->os_physmem_alloc_aligned (vm, idx, n_bytes, alignment); + if (!r) + *error = + clib_error_return (0, "failed to allocate %wd bytes of I/O memory", + n_bytes); + else + *error = 0; + return r; +} + +/* By default allocate I/O memory with cache line alignment. */ +always_inline void * +vlib_physmem_alloc (vlib_main_t * vm, vlib_physmem_region_index_t idx, + clib_error_t ** error, uword n_bytes) +{ + return vlib_physmem_alloc_aligned (vm, idx, error, n_bytes, + CLIB_CACHE_LINE_BYTES); +} + +always_inline void +vlib_physmem_free (vlib_main_t * vm, vlib_physmem_region_index_t idx, + void *mem) +{ + return vm->os_physmem_free (vm, idx, mem); +} + +always_inline u64 +vlib_physmem_virtual_to_physical (vlib_main_t * vm, + vlib_physmem_region_index_t idx, void *mem) +{ + vlib_physmem_main_t *vpm = &vm->physmem_main; + vlib_physmem_region_t *pr = pool_elt_at_index (vpm->regions, idx); + uword o = mem - pr->mem; + return vlib_physmem_offset_to_physical (vm, idx, o); +} + + +always_inline clib_error_t * +vlib_physmem_region_alloc (vlib_main_t * vm, char *name, u32 size, + u8 numa_node, u32 flags, + vlib_physmem_region_index_t * idx) +{ + return vm->os_physmem_region_alloc (vm, name, size, numa_node, flags, idx); +} + +always_inline void +vlib_physmem_region_free (struct vlib_main_t *vm, + vlib_physmem_region_index_t idx) +{ + vm->os_physmem_region_free (vm, idx); +} + +#endif /* included_vlib_physmem_funcs_h */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ -- cgit 1.2.3-korg