#include <limits.h>
#include <errno.h>
+#include <rte_spinlock.h>
+#include <rte_memory.h>
+#include <rte_bitmap.h>
+
#include <mlx5_common.h>
#include "mlx5_defs.h"
-/*
- * Compilation workaround for PPC64 when AltiVec is fully enabled, e.g. std=c11.
- * Otherwise there would be a type conflict between stdbool and altivec.
- */
-#if defined(__PPC64__) && !defined(__APPLE_ALTIVEC__)
-#undef bool
-/* redefine as in stdbool.h */
-#define bool _Bool
-#endif
-
/* Convert a bit number to the corresponding 64-bit mask */
#define MLX5_BITSHIFT(v) (UINT64_C(1) << (v))
(((val) & (from)) / ((from) / (to))) : \
(((val) & (from)) * ((to) / (from))))
+/*
+ * For the case which data is linked with sequence increased index, the
+ * array table will be more efficiect than hash table once need to serarch
+ * one data entry in large numbers of entries. Since the traditional hash
+ * tables has fixed table size, when huge numbers of data saved to the hash
+ * table, it also comes lots of hash conflict.
+ *
+ * But simple array table also has fixed size, allocates all the needed
+ * memory at once will waste lots of memory. For the case don't know the
+ * exactly number of entries will be impossible to allocate the array.
+ *
+ * Then the multiple level table helps to balance the two disadvantages.
+ * Allocate a global high level table with sub table entries at first,
+ * the global table contains the sub table entries, and the sub table will
+ * be allocated only once the corresponding index entry need to be saved.
+ * e.g. for up to 32-bits index, three level table with 10-10-12 splitting,
+ * with sequence increased index, the memory grows with every 4K entries.
+ *
+ * The currently implementation introduces 10-10-12 32-bits splitting
+ * Three-Level table to help the cases which have millions of enties to
+ * save. The index entries can be addressed directly by the index, no
+ * search will be needed.q
+ */
+
+/* L3 table global table define. */
+#define MLX5_L3T_GT_OFFSET 22
+#define MLX5_L3T_GT_SIZE (1 << 10)
+#define MLX5_L3T_GT_MASK (MLX5_L3T_GT_SIZE - 1)
+
+/* L3 table middle table define. */
+#define MLX5_L3T_MT_OFFSET 12
+#define MLX5_L3T_MT_SIZE (1 << 10)
+#define MLX5_L3T_MT_MASK (MLX5_L3T_MT_SIZE - 1)
+
+/* L3 table entry table define. */
+#define MLX5_L3T_ET_OFFSET 0
+#define MLX5_L3T_ET_SIZE (1 << 12)
+#define MLX5_L3T_ET_MASK (MLX5_L3T_ET_SIZE - 1)
+
+/* L3 table type. */
+enum mlx5_l3t_type {
+ MLX5_L3T_TYPE_WORD = 0,
+ MLX5_L3T_TYPE_DWORD,
+ MLX5_L3T_TYPE_QWORD,
+ MLX5_L3T_TYPE_PTR,
+ MLX5_L3T_TYPE_MAX,
+};
+
+struct mlx5_indexed_pool;
+
+/* Generic data struct. */
+union mlx5_l3t_data {
+ uint16_t word;
+ uint32_t dword;
+ uint64_t qword;
+ void *ptr;
+};
+
+/* L3 level table data structure. */
+struct mlx5_l3t_level_tbl {
+ uint64_t ref_cnt; /* Table ref_cnt. */
+ void *tbl[]; /* Table array. */
+};
+
+/* L3 word entry table data structure. */
+struct mlx5_l3t_entry_word {
+ uint32_t idx; /* Table index. */
+ uint64_t ref_cnt; /* Table ref_cnt. */
+ uint16_t entry[]; /* Entry array. */
+};
+
+/* L3 double word entry table data structure. */
+struct mlx5_l3t_entry_dword {
+ uint32_t idx; /* Table index. */
+ uint64_t ref_cnt; /* Table ref_cnt. */
+ uint32_t entry[]; /* Entry array. */
+};
+
+/* L3 quad word entry table data structure. */
+struct mlx5_l3t_entry_qword {
+ uint32_t idx; /* Table index. */
+ uint64_t ref_cnt; /* Table ref_cnt. */
+ uint64_t entry[]; /* Entry array. */
+};
+
+/* L3 pointer entry table data structure. */
+struct mlx5_l3t_entry_ptr {
+ uint32_t idx; /* Table index. */
+ uint64_t ref_cnt; /* Table ref_cnt. */
+ void *entry[]; /* Entry array. */
+};
+
+/* L3 table data structure. */
+struct mlx5_l3t_tbl {
+ enum mlx5_l3t_type type; /* Table type. */
+ struct mlx5_indexed_pool *eip;
+ /* Table index pool handles. */
+ struct mlx5_l3t_level_tbl *tbl; /* Global table index. */
+};
+
+/*
+ * The indexed memory entry index is made up of trunk index and offset of
+ * the entry in the trunk. Since the entry index is 32 bits, in case user
+ * prefers to have small trunks, user can change the macro below to a big
+ * number which helps the pool contains more trunks with lots of entries
+ * allocated.
+ */
+#define TRUNK_IDX_BITS 16
+#define TRUNK_MAX_IDX ((1 << TRUNK_IDX_BITS) - 1)
+#define TRUNK_INVALID TRUNK_MAX_IDX
+#define MLX5_IPOOL_DEFAULT_TRUNK_SIZE (1 << (28 - TRUNK_IDX_BITS))
+#ifdef RTE_LIBRTE_MLX5_DEBUG
+#define POOL_DEBUG 1
+#endif
+
+struct mlx5_indexed_pool_config {
+ uint32_t size; /* Pool entry size. */
+ uint32_t trunk_size:22;
+ /*
+ * Trunk entry number. Must be power of 2. It can be increased
+ * if trunk_grow enable. The trunk entry number increases with
+ * left shift grow_shift. Trunks with index are after grow_trunk
+ * will keep the entry number same with the last grow trunk.
+ */
+ uint32_t grow_trunk:4;
+ /*
+ * Trunks with entry number increase in the pool. Set it to 0
+ * to make the pool works as trunk entry fixed pool. It works
+ * only if grow_shift is not 0.
+ */
+ uint32_t grow_shift:4;
+ /*
+ * Trunk entry number increase shift value, stop after grow_trunk.
+ * It works only if grow_trunk is not 0.
+ */
+ uint32_t need_lock:1;
+ /* Lock is needed for multiple thread usage. */
+ uint32_t release_mem_en:1; /* Rlease trunk when it is free. */
+ const char *type; /* Memory allocate type name. */
+ void *(*malloc)(const char *type, size_t size, unsigned int align,
+ int socket);
+ /* User defined memory allocator. */
+ void (*free)(void *addr); /* User defined memory release. */
+};
+
+struct mlx5_indexed_trunk {
+ uint32_t idx; /* Trunk id. */
+ uint32_t prev; /* Previous free trunk in free list. */
+ uint32_t next; /* Next free trunk in free list. */
+ uint32_t free; /* Free entries available */
+ struct rte_bitmap *bmp;
+ uint8_t data[] __rte_cache_aligned; /* Entry data start. */
+};
+
+struct mlx5_indexed_pool {
+ struct mlx5_indexed_pool_config cfg; /* Indexed pool configuration. */
+ rte_spinlock_t lock; /* Pool lock for multiple thread usage. */
+ uint32_t n_trunk_valid; /* Trunks allocated. */
+ uint32_t n_trunk; /* Trunk pointer array size. */
+ /* Dim of trunk pointer array. */
+ struct mlx5_indexed_trunk **trunks;
+ uint32_t free_list; /* Index to first free trunk. */
+#ifdef POOL_DEBUG
+ uint32_t n_entry;
+ uint32_t trunk_new;
+ uint32_t trunk_avail;
+ uint32_t trunk_empty;
+ uint32_t trunk_free;
+#endif
+ uint32_t grow_tbl[]; /* Save the index offset for the grow trunks. */
+};
+
/**
* Return logarithm of the nearest power of two above input value.
*
void mlx5_hlist_destroy(struct mlx5_hlist *h,
mlx5_hlist_destroy_callback_fn cb, void *ctx);
+/**
+ * This function allocates non-initialized memory entry from pool.
+ * In NUMA systems, the memory entry allocated resides on the same
+ * NUMA socket as the core that calls this function.
+ *
+ * Memory entry is allocated from memory trunk, no alignment.
+ *
+ * @param pool
+ * Pointer to indexed memory entry pool.
+ * No initialization required.
+ * @param[out] idx
+ * Pointer to memory to save allocated index.
+ * Memory index always positive value.
+ * @return
+ * - Pointer to the allocated memory entry.
+ * - NULL on error. Not enough memory, or invalid arguments.
+ */
+void *mlx5_ipool_malloc(struct mlx5_indexed_pool *pool, uint32_t *idx);
+
+/**
+ * This function allocates zero initialized memory entry from pool.
+ * In NUMA systems, the memory entry allocated resides on the same
+ * NUMA socket as the core that calls this function.
+ *
+ * Memory entry is allocated from memory trunk, no alignment.
+ *
+ * @param pool
+ * Pointer to indexed memory pool.
+ * No initialization required.
+ * @param[out] idx
+ * Pointer to memory to save allocated index.
+ * Memory index always positive value.
+ * @return
+ * - Pointer to the allocated memory entry .
+ * - NULL on error. Not enough memory, or invalid arguments.
+ */
+void *mlx5_ipool_zmalloc(struct mlx5_indexed_pool *pool, uint32_t *idx);
+
+/**
+ * This function frees indexed memory entry to pool.
+ * Caller has to make sure that the index is allocated from same pool.
+ *
+ * @param pool
+ * Pointer to indexed memory pool.
+ * @param idx
+ * Allocated memory entry index.
+ */
+void mlx5_ipool_free(struct mlx5_indexed_pool *pool, uint32_t idx);
+
+/**
+ * This function returns pointer of indexed memory entry from index.
+ * Caller has to make sure that the index is valid, and allocated
+ * from same pool.
+ *
+ * @param pool
+ * Pointer to indexed memory pool.
+ * @param idx
+ * Allocated memory index.
+ * @return
+ * - Pointer to indexed memory entry.
+ */
+void *mlx5_ipool_get(struct mlx5_indexed_pool *pool, uint32_t idx);
+
+/**
+ * This function creates indexed memory pool.
+ * Caller has to configure the configuration accordingly.
+ *
+ * @param pool
+ * Pointer to indexed memory pool.
+ * @param cfg
+ * Allocated memory index.
+ */
+struct mlx5_indexed_pool *
+mlx5_ipool_create(struct mlx5_indexed_pool_config *cfg);
+
+/**
+ * This function releases all resources of pool.
+ * Caller has to make sure that all indexes and memories allocated
+ * from this pool not referenced anymore.
+ *
+ * @param pool
+ * Pointer to indexed memory pool.
+ * @return
+ * - non-zero value on error.
+ * - 0 on success.
+ */
+int mlx5_ipool_destroy(struct mlx5_indexed_pool *pool);
+
+/**
+ * This function dumps debug info of pool.
+ *
+ * @param pool
+ * Pointer to indexed memory pool.
+ */
+void mlx5_ipool_dump(struct mlx5_indexed_pool *pool);
+
+/**
+ * This function allocates new empty Three-level table.
+ *
+ * @param type
+ * The l3t can set as word, double word, quad word or pointer with index.
+ *
+ * @return
+ * - Pointer to the allocated l3t.
+ * - NULL on error. Not enough memory, or invalid arguments.
+ */
+struct mlx5_l3t_tbl *mlx5_l3t_create(enum mlx5_l3t_type type);
+
+/**
+ * This function destroys Three-level table.
+ *
+ * @param tbl
+ * Pointer to the l3t.
+ */
+void mlx5_l3t_destroy(struct mlx5_l3t_tbl *tbl);
+
+/**
+ * This function gets the index entry from Three-level table.
+ *
+ * @param tbl
+ * Pointer to the l3t.
+ * @param idx
+ * Index to the entry.
+ * @param data
+ * Pointer to the memory which saves the entry data.
+ * When function call returns 0, data contains the entry data get from
+ * l3t.
+ * When function call returns -1, data is not modified.
+ *
+ * @return
+ * 0 if success, -1 on error.
+ */
+
+uint32_t mlx5_l3t_get_entry(struct mlx5_l3t_tbl *tbl, uint32_t idx,
+ union mlx5_l3t_data *data);
+/**
+ * This function clears the index entry from Three-level table.
+ *
+ * @param tbl
+ * Pointer to the l3t.
+ * @param idx
+ * Index to the entry.
+ */
+void mlx5_l3t_clear_entry(struct mlx5_l3t_tbl *tbl, uint32_t idx);
+
+/**
+ * This function gets the index entry from Three-level table.
+ *
+ * @param tbl
+ * Pointer to the l3t.
+ * @param idx
+ * Index to the entry.
+ * @param data
+ * Pointer to the memory which contains the entry data save to l3t.
+ *
+ * @return
+ * 0 if success, -1 on error.
+ */
+uint32_t mlx5_l3t_set_entry(struct mlx5_l3t_tbl *tbl, uint32_t idx,
+ union mlx5_l3t_data *data);
+
+/*
+ * Macros for linked list based on indexed memory.
+ * Example data structure:
+ * struct Foo {
+ * ILIST_ENTRY(uint16_t) next;
+ * ...
+ * }
+ *
+ */
+#define ILIST_ENTRY(type) \
+struct { \
+ type prev; /* Index of previous element. */ \
+ type next; /* Index of next element. */ \
+}
+
+#define ILIST_INSERT(pool, head, idx, elem, field) \
+ do { \
+ typeof(elem) peer; \
+ MLX5_ASSERT((elem) && (idx)); \
+ (elem)->field.next = *(head); \
+ (elem)->field.prev = 0; \
+ if (*(head)) { \
+ (peer) = mlx5_ipool_get(pool, *(head)); \
+ if (peer) \
+ (peer)->field.prev = (idx); \
+ } \
+ *(head) = (idx); \
+ } while (0)
+
+#define ILIST_REMOVE(pool, head, idx, elem, field) \
+ do { \
+ typeof(elem) peer; \
+ MLX5_ASSERT(elem); \
+ MLX5_ASSERT(head); \
+ if ((elem)->field.prev) { \
+ (peer) = mlx5_ipool_get \
+ (pool, (elem)->field.prev); \
+ if (peer) \
+ (peer)->field.next = (elem)->field.next;\
+ } \
+ if ((elem)->field.next) { \
+ (peer) = mlx5_ipool_get \
+ (pool, (elem)->field.next); \
+ if (peer) \
+ (peer)->field.prev = (elem)->field.prev;\
+ } \
+ if (*(head) == (idx)) \
+ *(head) = (elem)->field.next; \
+ } while (0)
+
+#define ILIST_FOREACH(pool, head, idx, elem, field) \
+ for ((idx) = (head), (elem) = \
+ (idx) ? mlx5_ipool_get(pool, (idx)) : NULL; (elem); \
+ idx = (elem)->field.next, (elem) = \
+ (idx) ? mlx5_ipool_get(pool, idx) : NULL)
+
+/* Single index list. */
+#define SILIST_ENTRY(type) \
+struct { \
+ type next; /* Index of next element. */ \
+}
+
+#define SILIST_INSERT(head, idx, elem, field) \
+ do { \
+ MLX5_ASSERT((elem) && (idx)); \
+ (elem)->field.next = *(head); \
+ *(head) = (idx); \
+ } while (0)
+
+#define SILIST_FOREACH(pool, head, idx, elem, field) \
+ for ((idx) = (head), (elem) = \
+ (idx) ? mlx5_ipool_get(pool, (idx)) : NULL; (elem); \
+ idx = (elem)->field.next, (elem) = \
+ (idx) ? mlx5_ipool_get(pool, idx) : NULL)
+
#endif /* RTE_PMD_MLX5_UTILS_H_ */
git.droids-corp.org / dpdk.git / blobdiff