mem: allow memseg lists to be marked as external

[dpdk.git] / lib / librte_eal / common / eal_common_memory.c

diff --git a/lib/librte_eal/common/eal_common_memory.c b/lib/librte_eal/common/eal_common_memory.c
index 4a80dea..a2461ed 100644 (file)
--- a/lib/librte_eal/common/eal_common_memory.c
+++ b/lib/librte_eal/common/eal_common_memory.c
@@ -171,7 +171,7 @@ virt2memseg(const void *addr, const struct rte_memseg_list *msl)
 
        /* a memseg list was specified, check if it's the right one */
        start = msl->base_va;
-       end = RTE_PTR_ADD(start, (size_t)msl->page_sz * msl->memseg_arr.len);
+       end = RTE_PTR_ADD(start, msl->len);
 
        if (addr < start || addr >= end)
                return NULL;
@@ -194,8 +194,7 @@ virt2memseg_list(const void *addr)
                msl = &mcfg->memsegs[msl_idx];
 
                start = msl->base_va;
-               end = RTE_PTR_ADD(start,
-                               (size_t)msl->page_sz * msl->memseg_arr.len);
+               end = RTE_PTR_ADD(start, msl->len);
                if (addr >= start && addr < end)
                        break;
        }
@@ -273,6 +272,9 @@ physmem_size(const struct rte_memseg_list *msl, void *arg)
 {
        uint64_t *total_len = arg;
 
+       if (msl->external)
+               return 0;
+
        *total_len += msl->memseg_arr.count * msl->page_sz;
 
        return 0;
@@ -599,6 +601,56 @@ rte_memseg_get_fd(const struct rte_memseg *ms)
        return ret;
 }
 
+int __rte_experimental
+rte_memseg_get_fd_offset_thread_unsafe(const struct rte_memseg *ms,
+               size_t *offset)
+{
+       struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
+       struct rte_memseg_list *msl;
+       struct rte_fbarray *arr;
+       int msl_idx, seg_idx, ret;
+
+       if (ms == NULL || offset == NULL) {
+               rte_errno = EINVAL;
+               return -1;
+       }
+
+       msl = rte_mem_virt2memseg_list(ms->addr);
+       if (msl == NULL) {
+               rte_errno = EINVAL;
+               return -1;
+       }
+       arr = &msl->memseg_arr;
+
+       msl_idx = msl - mcfg->memsegs;
+       seg_idx = rte_fbarray_find_idx(arr, ms);
+
+       if (!rte_fbarray_is_used(arr, seg_idx)) {
+               rte_errno = ENOENT;
+               return -1;
+       }
+
+       ret = eal_memalloc_get_seg_fd_offset(msl_idx, seg_idx, offset);
+       if (ret < 0) {
+               rte_errno = -ret;
+               ret = -1;
+       }
+       return ret;
+}
+
+int __rte_experimental
+rte_memseg_get_fd_offset(const struct rte_memseg *ms, size_t *offset)
+{
+       struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
+       int ret;
+
+       rte_rwlock_read_lock(&mcfg->memory_hotplug_lock);
+       ret = rte_memseg_get_fd_offset_thread_unsafe(ms, offset);
+       rte_rwlock_read_unlock(&mcfg->memory_hotplug_lock);
+
+       return ret;
+}
+
 /* init memory subsystem */
 int
 rte_eal_memory_init(void)