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env: introduce a new mem_map_ops structure

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This struct will hold the unique operations for the mem_map.

This series of changes is aimed at enabling spdk_mem_map_translate to
report back to the user the length of the valid mem_map up to the
function that requested the translation.
This will be useful when retrieving memory regions associated with I/O
buffers in NVMe-oF. For large I/O it will be possible that the buffer is
split over multiple MRs and the I/O will have to be split into multiple
SGLs.

Change-Id: Ifdd82497f238d99345033f2615c718802a591438
Signed-off-by: Seth Howell <seth.howell@intel.com>
Reviewed-on: https://review.gerrithub.io/425327
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Chandler-Test-Pool: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
This commit is contained in:
Seth Howell 2018-09-11 14:32:54 -07:00 committed by Jim Harris
parent d288c41242
commit 1ee27f794d
2 changed files with 14 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
include/spdk/env.h
View File

@ -978,6 +978,13 @@ typedef int (*spdk_mem_map_notify_cb)(void *cb_ctx, struct spdk_mem_map *map,
enum spdk_mem_map_notify_action action,
void *vaddr, size_t size);
/**
* A function table to be implemented by each memory map.
*/
struct spdk_mem_map_ops {
spdk_mem_map_notify_cb notify_cb;
};
/**
* Allocate a virtual memory address translation map.
*

14
lib/env_dpdk/memory.c
View File

@ -82,7 +82,7 @@ struct spdk_mem_map {
struct map_256tb map_256tb;
pthread_mutex_t mutex;
uint64_t default_translation;
spdk_mem_map_notify_cb notify_cb;
struct spdk_mem_map_ops ops;
void *cb_ctx;
TAILQ_ENTRY(spdk_mem_map) tailq;
};
@ -106,7 +106,7 @@ spdk_mem_map_notify_walk(struct spdk_mem_map *map, enum spdk_mem_map_notify_acti
do { \
if (contig_start != 0) { \
/* End of of a virtually contiguous range */ \
map->notify_cb(map->cb_ctx, map, action, \
map->ops.notify_cb(map->cb_ctx, map, action, \
(void *)contig_start, \
contig_end - contig_start + 2 * 1024 * 1024); \
} \
@ -166,7 +166,7 @@ spdk_mem_map_alloc(uint64_t default_translation, spdk_mem_map_notify_cb notify_c
}
map->default_translation = default_translation;
map->notify_cb = notify_cb;
map->ops.notify_cb = notify_cb;
map->cb_ctx = cb_ctx;
pthread_mutex_lock(&g_spdk_mem_map_mutex);
@ -245,7 +245,7 @@ spdk_mem_register(void *vaddr, size_t len)
if (ref_count > 0) {
if (seg_len > 0) {
TAILQ_FOREACH(map, &g_spdk_mem_maps, tailq) {
rc = map->notify_cb(map->cb_ctx, map, SPDK_MEM_MAP_NOTIFY_REGISTER, seg_vaddr, seg_len);
rc = map->ops.notify_cb(map->cb_ctx, map, SPDK_MEM_MAP_NOTIFY_REGISTER, seg_vaddr, seg_len);
if (rc != 0) {
pthread_mutex_unlock(&g_spdk_mem_map_mutex);
return rc;
@ -265,7 +265,7 @@ spdk_mem_register(void *vaddr, size_t len)
if (seg_len > 0) {
TAILQ_FOREACH(map, &g_spdk_mem_maps, tailq) {
rc = map->notify_cb(map->cb_ctx, map, SPDK_MEM_MAP_NOTIFY_REGISTER, seg_vaddr, seg_len);
rc = map->ops.notify_cb(map->cb_ctx, map, SPDK_MEM_MAP_NOTIFY_REGISTER, seg_vaddr, seg_len);
if (rc != 0) {
pthread_mutex_unlock(&g_spdk_mem_map_mutex);
return rc;
@ -321,7 +321,7 @@ spdk_mem_unregister(void *vaddr, size_t len)
if (ref_count > 1) {
if (seg_len > 0) {
TAILQ_FOREACH(map, &g_spdk_mem_maps, tailq) {
rc = map->notify_cb(map->cb_ctx, map, SPDK_MEM_MAP_NOTIFY_UNREGISTER, seg_vaddr, seg_len);
rc = map->ops.notify_cb(map->cb_ctx, map, SPDK_MEM_MAP_NOTIFY_UNREGISTER, seg_vaddr, seg_len);
if (rc != 0) {
pthread_mutex_unlock(&g_spdk_mem_map_mutex);
return rc;
@ -341,7 +341,7 @@ spdk_mem_unregister(void *vaddr, size_t len)
if (seg_len > 0) {
TAILQ_FOREACH(map, &g_spdk_mem_maps, tailq) {
rc = map->notify_cb(map->cb_ctx, map, SPDK_MEM_MAP_NOTIFY_UNREGISTER, seg_vaddr, seg_len);
rc = map->ops.notify_cb(map->cb_ctx, map, SPDK_MEM_MAP_NOTIFY_UNREGISTER, seg_vaddr, seg_len);
if (rc != 0) {
pthread_mutex_unlock(&g_spdk_mem_map_mutex);
return rc;