#include <rte_rwlock.h>
#include "mlx5_glue.h"
+#include "mlx5_common.h"
#include "mlx5_common_mp.h"
#include "mlx5_common_mr.h"
+#include "mlx5_common_os.h"
#include "mlx5_common_log.h"
#include "mlx5_malloc.h"
unsigned int mrs_n;
};
+void
+mlx5_mprq_buf_free_cb(void *addr __rte_unused, void *opaque)
+{
+ struct mlx5_mprq_buf *buf = opaque;
+
+ if (__atomic_load_n(&buf->refcnt, __ATOMIC_RELAXED) == 1) {
+ rte_mempool_put(buf->mp, buf);
+ } else if (unlikely(__atomic_sub_fetch(&buf->refcnt, 1,
+ __ATOMIC_RELAXED) == 0)) {
+ __atomic_store_n(&buf->refcnt, 1, __ATOMIC_RELAXED);
+ rte_mempool_put(buf->mp, buf);
+ }
+}
+
/**
* Expand B-tree table to a given size. Can't be called with holding
* memory_hotplug_lock or share_cache.rwlock due to rte_realloc().
* @return
* 0 on success, a negative errno value otherwise and rte_errno is set.
*/
-int
+static int
mlx5_mr_btree_init(struct mlx5_mr_btree *bt, int n, int socket)
{
if (bt == NULL) {
#endif
}
+/**
+ * Initialize per-queue MR control descriptor.
+ *
+ * @param mr_ctrl
+ * Pointer to MR control structure.
+ * @param dev_gen_ptr
+ * Pointer to generation number of global cache.
+ * @param socket
+ * NUMA socket on which memory must be allocated.
+ *
+ * @return
+ * 0 on success, a negative errno value otherwise and rte_errno is set.
+ */
+int
+mlx5_mr_ctrl_init(struct mlx5_mr_ctrl *mr_ctrl, uint32_t *dev_gen_ptr,
+ int socket)
+{
+ if (mr_ctrl == NULL) {
+ rte_errno = EINVAL;
+ return -rte_errno;
+ }
+ /* Save pointer of global generation number to check memory event. */
+ mr_ctrl->dev_gen_ptr = dev_gen_ptr;
+ /* Initialize B-tree and allocate memory for bottom-half cache table. */
+ return mlx5_mr_btree_init(&mr_ctrl->cache_bh, MLX5_MR_BTREE_CACHE_N,
+ socket);
+}
+
/**
* Find virtually contiguous memory chunk in a given MR.
*
* @return
* Searched LKey on success, UINT32_MAX on failure and rte_errno is set.
*/
-uint32_t
+static uint32_t
mlx5_mr_lookup_cache(struct mlx5_mr_share_cache *share_cache,
struct mr_cache_entry *entry, uintptr_t addr)
{
*
* @param pd
* Pointer to pd of a device (net, regex, vdpa,...).
+ * @param mp_id
+ * Multi-process identifier, may be NULL for the primary process.
* @param share_cache
* Pointer to a global shared MR cache.
* @param[out] entry
{
int ret;
+ if (mp_id == NULL) {
+ rte_errno = EINVAL;
+ return UINT32_MAX;
+ }
DRV_LOG(DEBUG, "port %u requesting MR creation for address (%p)",
mp_id->port_id, (void *)addr);
ret = mlx5_mp_req_mr_create(mp_id, addr);
*
* @param pd
* Pointer to pd handle of a device (net, regex, vdpa,...).
+ * @param mp_id
+ * Multi-process identifier, may be NULL for the primary process.
* @param share_cache
* Pointer to a global shared MR cache.
* @param[out] entry
* created. If failed to create one, this will not be updated.
* @param addr
* Target virtual address to register.
+ * @param mr_ext_memseg_en
+ * Configurable flag about external memory segment enable or not.
*
* @return
* Searched LKey on success, UINT32_MAX on failure and rte_errno is set.
*
* @param pd
* Pointer to pd of a device (net, regex, vdpa,...).
+ * @param mp_id
+ * Multi-process identifier, may be NULL for the primary process.
* @param share_cache
* Pointer to a global shared MR cache.
* @param mr_ctrl
* created. If failed to create one, this is not written.
* @param addr
* Search key.
+ * @param mr_ext_memseg_en
+ * Configurable flag about external memory segment enable or not.
*
* @return
* Searched LKey on success, UINT32_MAX on no match.
*
* @param pd
* Pointer to pd of a device (net, regex, vdpa,...).
+ * @param mp_id
+ * Multi-process identifier, may be NULL for the primary process.
* @param share_cache
* Pointer to a global shared MR cache.
* @param mr_ctrl
* Pointer to per-queue MR control structure.
* @param addr
* Search key.
+ * @param mr_ext_memseg_en
+ * Configurable flag about external memory segment enable or not.
*
* @return
* Searched LKey on success, UINT32_MAX on no match.
*/
-uint32_t mlx5_mr_addr2mr_bh(void *pd, struct mlx5_mp_id *mp_id,
- struct mlx5_mr_share_cache *share_cache,
- struct mlx5_mr_ctrl *mr_ctrl,
- uintptr_t addr, unsigned int mr_ext_memseg_en)
+static uint32_t
+mlx5_mr_addr2mr_bh(void *pd, struct mlx5_mp_id *mp_id,
+ struct mlx5_mr_share_cache *share_cache,
+ struct mlx5_mr_ctrl *mr_ctrl, uintptr_t addr,
+ unsigned int mr_ext_memseg_en)
{
uint32_t lkey;
uint16_t bh_idx = 0;
}
/**
- * Release all the created MRs and resources on global MR cache of a device.
+ * Release all the created MRs and resources on global MR cache of a device
* list.
*
* @param share_cache
mlx5_mr_garbage_collect(share_cache);
}
+/**
+ * Initialize global MR cache of a device.
+ *
+ * @param share_cache
+ * Pointer to a global shared MR cache.
+ * @param socket
+ * NUMA socket on which memory must be allocated.
+ *
+ * @return
+ * 0 on success, a negative errno value otherwise and rte_errno is set.
+ */
+int
+mlx5_mr_create_cache(struct mlx5_mr_share_cache *share_cache, int socket)
+{
+ /* Set the reg_mr and dereg_mr callback functions */
+ mlx5_os_set_reg_mr_cb(&share_cache->reg_mr_cb,
+ &share_cache->dereg_mr_cb);
+ rte_rwlock_init(&share_cache->rwlock);
+ rte_rwlock_init(&share_cache->mprwlock);
+ share_cache->mp_cb_registered = 0;
+ /* Initialize B-tree and allocate memory for global MR cache table. */
+ return mlx5_mr_btree_init(&share_cache->cache,
+ MLX5_MR_BTREE_CACHE_N * 2, socket);
+}
+
/**
* Flush all of the local cache entries.
*
/**
* Dump all the created MRs and the global cache entries.
*
- * @param sh
- * Pointer to Ethernet device shared context.
+ * @param share_cache
+ * Pointer to a global shared MR cache.
*/
void
mlx5_mr_dump_cache(struct mlx5_mr_share_cache *share_cache __rte_unused)
mpr = mlx5_mempool_reg_lookup(share_cache, mp);
if (mpr == NULL) {
mlx5_mempool_reg_attach(new_mpr);
- LIST_INSERT_HEAD(&share_cache->mempool_reg_list,
- new_mpr, next);
+ LIST_INSERT_HEAD(&share_cache->mempool_reg_list, new_mpr, next);
ret = 0;
}
rte_rwlock_write_unlock(&share_cache->rwlock);
mr_ctrl->head = (mr_ctrl->head + 1) % MLX5_MR_CACHE_N;
return lkey;
}
+
+/**
+ * Bottom-half of LKey search on. If supported, lookup for the address from
+ * the mempool. Otherwise, search in old mechanism caches.
+ *
+ * @param cdev
+ * Pointer to mlx5 device.
+ * @param mp_id
+ * Multi-process identifier, may be NULL for the primary process.
+ * @param mr_ctrl
+ * Pointer to per-queue MR control structure.
+ * @param mb
+ * Pointer to mbuf.
+ *
+ * @return
+ * Searched LKey on success, UINT32_MAX on no match.
+ */
+static uint32_t
+mlx5_mr_mb2mr_bh(struct mlx5_common_device *cdev, struct mlx5_mp_id *mp_id,
+ struct mlx5_mr_ctrl *mr_ctrl, struct rte_mbuf *mb)
+{
+ uint32_t lkey;
+ uintptr_t addr = (uintptr_t)mb->buf_addr;
+
+ if (cdev->config.mr_mempool_reg_en) {
+ struct rte_mempool *mp = NULL;
+ struct mlx5_mprq_buf *buf;
+
+ if (!RTE_MBUF_HAS_EXTBUF(mb)) {
+ mp = mlx5_mb2mp(mb);
+ } else if (mb->shinfo->free_cb == mlx5_mprq_buf_free_cb) {
+ /* Recover MPRQ mempool. */
+ buf = mb->shinfo->fcb_opaque;
+ mp = buf->mp;
+ }
+ if (mp != NULL) {
+ lkey = mlx5_mr_mempool2mr_bh(&cdev->mr_scache,
+ mr_ctrl, mp, addr);
+ /*
+ * Lookup can only fail on invalid input, e.g. "addr"
+ * is not from "mp" or "mp" has MEMPOOL_F_NON_IO set.
+ */
+ if (lkey != UINT32_MAX)
+ return lkey;
+ }
+ /* Fallback for generic mechanism in corner cases. */
+ }
+ return mlx5_mr_addr2mr_bh(cdev->pd, mp_id, &cdev->mr_scache, mr_ctrl,
+ addr, cdev->config.mr_ext_memseg_en);
+}
+
+/**
+ * Query LKey from a packet buffer.
+ *
+ * @param cdev
+ * Pointer to the mlx5 device structure.
+ * @param mp_id
+ * Multi-process identifier, may be NULL for the primary process.
+ * @param mr_ctrl
+ * Pointer to per-queue MR control structure.
+ * @param mbuf
+ * Pointer to mbuf.
+ *
+ * @return
+ * Searched LKey on success, UINT32_MAX on no match.
+ */
+uint32_t
+mlx5_mr_mb2mr(struct mlx5_common_device *cdev, struct mlx5_mp_id *mp_id,
+ struct mlx5_mr_ctrl *mr_ctrl, struct rte_mbuf *mbuf)
+{
+ uint32_t lkey;
+
+ /* Check generation bit to see if there's any change on existing MRs. */
+ if (unlikely(*mr_ctrl->dev_gen_ptr != mr_ctrl->cur_gen))
+ mlx5_mr_flush_local_cache(mr_ctrl);
+ /* Linear search on MR cache array. */
+ lkey = mlx5_mr_lookup_lkey(mr_ctrl->cache, &mr_ctrl->mru,
+ MLX5_MR_CACHE_N, (uintptr_t)mbuf->buf_addr);
+ if (likely(lkey != UINT32_MAX))
+ return lkey;
+ /* Take slower bottom-half on miss. */
+ return mlx5_mr_mb2mr_bh(cdev, mp_id, mr_ctrl, mbuf);
+}
git.droids-corp.org / dpdk.git / blobdiff