+++ /dev/null
-/*
- * 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.c: Unix physical memory
- *
- * 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.
- */
-
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/mount.h>
-#include <sys/mman.h>
-#include <sys/fcntl.h>
-#include <sys/stat.h>
-#include <unistd.h>
-
-#include <vppinfra/linux/syscall.h>
-#include <vppinfra/linux/sysfs.h>
-#include <vlib/vlib.h>
-#include <vlib/physmem.h>
-#include <vlib/unix/unix.h>
-#include <vlib/pci/pci.h>
-#include <vlib/linux/vfio.h>
-
-static void *
-unix_physmem_alloc_aligned (vlib_main_t * vm, vlib_physmem_region_index_t idx,
- uword n_bytes, uword alignment)
-{
- vlib_physmem_region_t *pr = vlib_physmem_get_region (vm, idx);
- uword lo_offset, hi_offset;
- uword *to_free = 0;
-
- if (pr->heap == 0)
- return 0;
-
- /* IO memory is always at least cache aligned. */
- alignment = clib_max (alignment, CLIB_CACHE_LINE_BYTES);
-
- while (1)
- {
-#if USE_DLMALLOC == 0
-
- mheap_get_aligned (pr->heap, n_bytes,
- /* align */ alignment,
- /* align offset */ 0,
- &lo_offset);
-#else
- lo_offset = (uword) mspace_get_aligned (pr->heap, n_bytes,
- alignment, ~0ULL /* offset */ );
- if (lo_offset == 0)
- lo_offset = ~0ULL;
-#endif
-
- /* Allocation failed? */
- if (lo_offset == ~0)
- break;
-
- /* Make sure allocation does not span DMA physical chunk boundary. */
- hi_offset = lo_offset + n_bytes - 1;
-
- if (((pointer_to_uword (pr->heap) + lo_offset) >> pr->log2_page_size) ==
- ((pointer_to_uword (pr->heap) + hi_offset) >> pr->log2_page_size))
- break;
-
- /* Allocation would span chunk boundary, queue it to be freed as soon as
- we find suitable chunk. */
- vec_add1 (to_free, lo_offset);
- }
-
- if (to_free != 0)
- {
- uword i;
- for (i = 0; i < vec_len (to_free); i++)
- {
-#if USE_DLMALLOC == 0
- mheap_put (pr->heap, to_free[i]);
-#else
- mspace_put_no_offset (pr->heap, (void *) to_free[i]);
-#endif
- }
- vec_free (to_free);
- }
-
-#if USE_DLMALLOC == 0
- return lo_offset != ~0 ? (void *) (pr->heap + lo_offset) : 0;
-#else
- return lo_offset != ~0 ? (void *) lo_offset : 0;
-#endif
-}
-
-static void
-unix_physmem_free (vlib_main_t * vm, vlib_physmem_region_index_t idx, void *x)
-{
- vlib_physmem_region_t *pr = vlib_physmem_get_region (vm, idx);
- /* Return object to region's heap. */
-#if USE_DLMALLOC == 0
- mheap_put (pr->heap, x - pr->heap);
-#else
- mspace_put_no_offset (pr->heap, x);
-#endif
-}
-
-static clib_error_t *
-unix_physmem_region_alloc (vlib_main_t * vm, char *name, u32 size,
- u8 numa_node, u32 flags,
- vlib_physmem_region_index_t * idx)
-{
- vlib_physmem_main_t *vpm = &physmem_main;
- vlib_physmem_region_t *pr;
- clib_error_t *error = 0;
- clib_mem_vm_alloc_t alloc = { 0 };
- int i;
-
- pool_get (vpm->regions, pr);
-
- if ((pr - vpm->regions) >= 256)
- {
- error = clib_error_return (0, "maximum number of regions reached");
- goto error;
- }
-
- alloc.name = name;
- alloc.size = size;
- alloc.numa_node = numa_node;
-
- alloc.flags = (flags & VLIB_PHYSMEM_F_SHARED) ?
- CLIB_MEM_VM_F_SHARED : CLIB_MEM_VM_F_LOCKED;
-
- if ((flags & VLIB_PHYSMEM_F_HUGETLB))
- {
- alloc.flags |= CLIB_MEM_VM_F_HUGETLB;
- alloc.flags |= CLIB_MEM_VM_F_HUGETLB_PREALLOC;
- alloc.flags |= CLIB_MEM_VM_F_NUMA_FORCE;
- }
- else
- {
- alloc.flags |= CLIB_MEM_VM_F_NUMA_PREFER;
- }
-
- error = clib_mem_vm_ext_alloc (&alloc);
- if (error)
- goto error;
-
- pr->index = pr - vpm->regions;
- pr->flags = flags;
- pr->fd = alloc.fd;
- pr->mem = alloc.addr;
- pr->log2_page_size = alloc.log2_page_size;
- pr->n_pages = alloc.n_pages;
- pr->size = (u64) pr->n_pages << (u64) pr->log2_page_size;
- pr->page_mask = (1ull << pr->log2_page_size) - 1;
- pr->numa_node = numa_node;
- pr->name = format (0, "%s%c", name, 0);
-
- for (i = 0; i < pr->n_pages; i++)
- {
- void *ptr = pr->mem + ((u64) i << pr->log2_page_size);
- int node;
- if ((move_pages (0, 1, &ptr, 0, &node, 0) == 0) && (numa_node != node))
- {
- clib_warning ("physmem page for region \'%s\' allocated on the"
- " wrong numa node (requested %u actual %u)",
- pr->name, pr->numa_node, node, i);
- break;
- }
- }
-
- pr->page_table = clib_mem_vm_get_paddr (pr->mem, pr->log2_page_size,
- pr->n_pages);
-
- linux_vfio_dma_map_regions (vm);
-
- if (flags & VLIB_PHYSMEM_F_INIT_MHEAP)
- {
-#if USE_DLMALLOC == 0
- pr->heap = mheap_alloc_with_flags (pr->mem, pr->size,
- /* Don't want mheap mmap/munmap with IO memory. */
- MHEAP_FLAG_DISABLE_VM |
- MHEAP_FLAG_THREAD_SAFE);
-#else
- pr->heap = create_mspace_with_base (pr->mem, pr->size, 1 /* locked */ );
- mspace_disable_expand (pr->heap);
-#endif
- }
-
- *idx = pr->index;
-
- goto done;
-
-error:
- clib_memset (pr, 0, sizeof (*pr));
- pool_put (vpm->regions, pr);
-
-done:
- return error;
-}
-
-static void
-unix_physmem_region_free (vlib_main_t * vm, vlib_physmem_region_index_t idx)
-{
- vlib_physmem_main_t *vpm = &physmem_main;
- vlib_physmem_region_t *pr = vlib_physmem_get_region (vm, idx);
-
- if (pr->fd > 0)
- close (pr->fd);
- munmap (pr->mem, pr->size);
- vec_free (pr->name);
- pool_put (vpm->regions, pr);
-}
-
-clib_error_t *
-unix_physmem_init (vlib_main_t * vm)
-{
- vlib_physmem_main_t *vpm = &physmem_main;
- clib_error_t *error = 0;
- u64 *pt = 0;
-
- /* Avoid multiple calls. */
- if (vm->os_physmem_alloc_aligned)
- return error;
-
- /* check if pagemap is accessible */
- pt = clib_mem_vm_get_paddr (&pt, min_log2 (sysconf (_SC_PAGESIZE)), 1);
- if (pt[0])
- vpm->flags |= VLIB_PHYSMEM_MAIN_F_HAVE_PAGEMAP;
- vec_free (pt);
-
- if ((error = linux_vfio_init (vm)))
- return error;
-
- vm->os_physmem_alloc_aligned = unix_physmem_alloc_aligned;
- vm->os_physmem_free = unix_physmem_free;
- vm->os_physmem_region_alloc = unix_physmem_region_alloc;
- vm->os_physmem_region_free = unix_physmem_region_free;
-
- return error;
-}
-
-static clib_error_t *
-show_physmem (vlib_main_t * vm,
- unformat_input_t * input, vlib_cli_command_t * cmd)
-{
- vlib_physmem_main_t *vpm = &physmem_main;
- vlib_physmem_region_t *pr;
-
- /* *INDENT-OFF* */
- pool_foreach (pr, vpm->regions, (
- {
- vlib_cli_output (vm, "index %u name '%s' page-size %uKB num-pages %d "
- "numa-node %u fd %d\n",
- pr->index, pr->name, (1 << (pr->log2_page_size -10)),
- pr->n_pages, pr->numa_node, pr->fd);
- if (pr->heap)
- vlib_cli_output (vm, " %U", format_mheap, pr->heap, /* verbose */ 1);
- else
- vlib_cli_output (vm, " no heap\n");
- }));
- /* *INDENT-ON* */
- return 0;
-}
-
-/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (show_physmem_command, static) = {
- .path = "show physmem",
- .short_help = "Show physical memory allocation",
- .function = show_physmem,
-};
-/* *INDENT-ON* */
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
Code Review / vpp.git / blobdiff