drivers/mempool/dpaa/dpaa_mempool.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  *
   3  *   Copyright 2017 NXP
   4  *
   5  */
   6
   7 /* System headers */
   8 #include <stdio.h>
   9 #include <inttypes.h>
  10 #include <unistd.h>
  11 #include <limits.h>
  12 #include <sched.h>
  13 #include <signal.h>
  14 #include <pthread.h>
  15 #include <sys/types.h>
  16 #include <sys/syscall.h>
  17
  18 #include <rte_byteorder.h>
  19 #include <rte_common.h>
  20 #include <rte_log.h>
  21 #include <rte_debug.h>
  22 #include <rte_memory.h>
  23 #include <rte_tailq.h>
  24 #include <rte_eal.h>
  25 #include <rte_malloc.h>
  26 #include <rte_ring.h>
  27
  28 #include <dpaa_mempool.h>
  29
  30 struct dpaa_bp_info rte_dpaa_bpid_info[DPAA_MAX_BPOOLS];
  31
  32 static int
  33 dpaa_mbuf_create_pool(struct rte_mempool *mp)
  34 {
  35         struct bman_pool *bp;
  36         struct bm_buffer bufs[8];
  37         struct dpaa_bp_info *bp_info;
  38         uint8_t bpid;
  39         int num_bufs = 0, ret = 0;
  40         struct bman_pool_params params = {
  41                 .flags = BMAN_POOL_FLAG_DYNAMIC_BPID
  42         };
  43
  44         MEMPOOL_INIT_FUNC_TRACE();
  45
  46         bp = bman_new_pool(&params);
  47         if (!bp) {
  48                 DPAA_MEMPOOL_ERR("bman_new_pool() failed");
  49                 return -ENODEV;
  50         }
  51         bpid = bman_get_params(bp)->bpid;
  52
  53         /* Drain the pool of anything already in it. */
  54         do {
  55                 /* Acquire is all-or-nothing, so we drain in 8s,
  56                  * then in 1s for the remainder.
  57                  */
  58                 if (ret != 1)
  59                         ret = bman_acquire(bp, bufs, 8, 0);
  60                 if (ret < 8)
  61                         ret = bman_acquire(bp, bufs, 1, 0);
  62                 if (ret > 0)
  63                         num_bufs += ret;
  64         } while (ret > 0);
  65         if (num_bufs)
  66                 DPAA_MEMPOOL_WARN("drained %u bufs from BPID %d",
  67                                   num_bufs, bpid);
  68
  69         rte_dpaa_bpid_info[bpid].mp = mp;
  70         rte_dpaa_bpid_info[bpid].bpid = bpid;
  71         rte_dpaa_bpid_info[bpid].size = mp->elt_size;
  72         rte_dpaa_bpid_info[bpid].bp = bp;
  73         rte_dpaa_bpid_info[bpid].meta_data_size =
  74                 sizeof(struct rte_mbuf) + rte_pktmbuf_priv_size(mp);
  75         rte_dpaa_bpid_info[bpid].dpaa_ops_index = mp->ops_index;
  76         rte_dpaa_bpid_info[bpid].ptov_off = 0;
  77         rte_dpaa_bpid_info[bpid].flags = 0;
  78
  79         bp_info = rte_malloc(NULL,
  80                              sizeof(struct dpaa_bp_info),
  81                              RTE_CACHE_LINE_SIZE);
  82         if (!bp_info) {
  83                 DPAA_MEMPOOL_WARN("Memory allocation failed for bp_info");
  84                 bman_free_pool(bp);
  85                 return -ENOMEM;
  86         }
  87
  88         rte_memcpy(bp_info, (void *)&rte_dpaa_bpid_info[bpid],
  89                    sizeof(struct dpaa_bp_info));
  90         mp->pool_data = (void *)bp_info;
  91
  92         DPAA_MEMPOOL_INFO("BMAN pool created for bpid =%d", bpid);
  93         return 0;
  94 }
  95
  96 static void
  97 dpaa_mbuf_free_pool(struct rte_mempool *mp)
  98 {
  99         struct dpaa_bp_info *bp_info = DPAA_MEMPOOL_TO_POOL_INFO(mp);
 100
 101         MEMPOOL_INIT_FUNC_TRACE();
 102
 103         if (bp_info) {
 104                 bman_free_pool(bp_info->bp);
 105                 DPAA_MEMPOOL_INFO("BMAN pool freed for bpid =%d",
 106                                   bp_info->bpid);
 107                 rte_free(mp->pool_data);
 108                 mp->pool_data = NULL;
 109         }
 110 }
 111
 112 static void
 113 dpaa_buf_free(struct dpaa_bp_info *bp_info, uint64_t addr)
 114 {
 115         struct bm_buffer buf;
 116         int ret;
 117
 118         DPAA_MEMPOOL_DEBUG("Free 0x%lx to bpid: %d", addr, bp_info->bpid);
 119
 120         bm_buffer_set64(&buf, addr);
 121 retry:
 122         ret = bman_release(bp_info->bp, &buf, 1, 0);
 123         if (ret) {
 124                 DPAA_MEMPOOL_DEBUG("BMAN busy. Retrying...");
 125                 cpu_spin(CPU_SPIN_BACKOFF_CYCLES);
 126                 goto retry;
 127         }
 128 }
 129
 130 static int
 131 dpaa_mbuf_free_bulk(struct rte_mempool *pool,
 132                     void *const *obj_table,
 133                     unsigned int n)
 134 {
 135         struct dpaa_bp_info *bp_info = DPAA_MEMPOOL_TO_POOL_INFO(pool);
 136         int ret;
 137         unsigned int i = 0;
 138
 139         DPAA_MEMPOOL_DPDEBUG("Request to free %d buffers in bpid = %d",
 140                              n, bp_info->bpid);
 141
 142         ret = rte_dpaa_portal_init((void *)0);
 143         if (ret) {
 144                 DPAA_MEMPOOL_ERR("rte_dpaa_portal_init failed with ret: %d",
 145                                  ret);
 146                 return 0;
 147         }
 148
 149         while (i < n) {
 150                 uint64_t phy = rte_mempool_virt2iova(obj_table[i]);
 151
 152                 if (unlikely(!bp_info->ptov_off)) {
 153                         /* buffers are not from multiple memzones */
 154                         if (!(bp_info->flags & DPAA_MPOOL_MULTI_MEMZONE)) {
 155                                 bp_info->ptov_off
 156                                                 = (uint64_t)obj_table[i] - phy;
 157                                 rte_dpaa_bpid_info[bp_info->bpid].ptov_off
 158                                                 = bp_info->ptov_off;
 159                         }
 160                 }
 161
 162                 dpaa_buf_free(bp_info,
 163                               (uint64_t)phy + bp_info->meta_data_size);
 164                 i = i + 1;
 165         }
 166
 167         DPAA_MEMPOOL_DPDEBUG("freed %d buffers in bpid =%d",
 168                              n, bp_info->bpid);
 169
 170         return 0;
 171 }
 172
 173 static int
 174 dpaa_mbuf_alloc_bulk(struct rte_mempool *pool,
 175                      void **obj_table,
 176                      unsigned int count)
 177 {
 178         struct rte_mbuf **m = (struct rte_mbuf **)obj_table;
 179         struct bm_buffer bufs[DPAA_MBUF_MAX_ACQ_REL];
 180         struct dpaa_bp_info *bp_info;
 181         void *bufaddr;
 182         int i, ret;
 183         unsigned int n = 0;
 184
 185         bp_info = DPAA_MEMPOOL_TO_POOL_INFO(pool);
 186
 187         DPAA_MEMPOOL_DPDEBUG("Request to alloc %d buffers in bpid = %d",
 188                              count, bp_info->bpid);
 189
 190         if (unlikely(count >= (RTE_MEMPOOL_CACHE_MAX_SIZE * 2))) {
 191                 DPAA_MEMPOOL_ERR("Unable to allocate requested (%u) buffers",
 192                                  count);
 193                 return -1;
 194         }
 195
 196         ret = rte_dpaa_portal_init((void *)0);
 197         if (ret) {
 198                 DPAA_MEMPOOL_ERR("rte_dpaa_portal_init failed with ret: %d",
 199                                  ret);
 200                 return -1;
 201         }
 202
 203         while (n < count) {
 204                 /* Acquire is all-or-nothing, so we drain in 7s,
 205                  * then the remainder.
 206                  */
 207                 if ((count - n) > DPAA_MBUF_MAX_ACQ_REL) {
 208                         ret = bman_acquire(bp_info->bp, bufs,
 209                                            DPAA_MBUF_MAX_ACQ_REL, 0);
 210                 } else {
 211                         ret = bman_acquire(bp_info->bp, bufs, count - n, 0);
 212                 }
 213                 /* In case of less than requested number of buffers available
 214                  * in pool, qbman_swp_acquire returns 0
 215                  */
 216                 if (ret <= 0) {
 217                         DPAA_MEMPOOL_DPDEBUG("Buffer acquire failed (%d)",
 218                                              ret);
 219                         /* The API expect the exact number of requested
 220                          * buffers. Releasing all buffers allocated
 221                          */
 222                         dpaa_mbuf_free_bulk(pool, obj_table, n);
 223                         return -ENOBUFS;
 224                 }
 225                 /* assigning mbuf from the acquired objects */
 226                 for (i = 0; (i < ret) && bufs[i].addr; i++) {
 227                         /* TODO-errata - objerved that bufs may be null
 228                          * i.e. first buffer is valid, remaining 6 buffers
 229                          * may be null.
 230                          */
 231                         bufaddr = DPAA_MEMPOOL_PTOV(bp_info, bufs[i].addr);
 232                         m[n] = (struct rte_mbuf *)((char *)bufaddr
 233                                                 - bp_info->meta_data_size);
 234                         DPAA_MEMPOOL_DPDEBUG("Paddr (%p), FD (%p) from BMAN",
 235                                              (void *)bufaddr, (void *)m[n]);
 236                         n++;
 237                 }
 238         }
 239
 240         DPAA_MEMPOOL_DPDEBUG("Allocated %d buffers from bpid=%d",
 241                              n, bp_info->bpid);
 242         return 0;
 243 }
 244
 245 static unsigned int
 246 dpaa_mbuf_get_count(const struct rte_mempool *mp)
 247 {
 248         struct dpaa_bp_info *bp_info;
 249
 250         MEMPOOL_INIT_FUNC_TRACE();
 251
 252         if (!mp || !mp->pool_data) {
 253                 DPAA_MEMPOOL_ERR("Invalid mempool provided\n");
 254                 return 0;
 255         }
 256
 257         bp_info = DPAA_MEMPOOL_TO_POOL_INFO(mp);
 258
 259         return bman_query_free_buffers(bp_info->bp);
 260 }
 261
 262 static int
 263 dpaa_register_memory_area(const struct rte_mempool *mp,
 264                           char *vaddr __rte_unused,
 265                           rte_iova_t paddr __rte_unused,
 266                           size_t len)
 267 {
 268         struct dpaa_bp_info *bp_info;
 269         unsigned int total_elt_sz;
 270
 271         MEMPOOL_INIT_FUNC_TRACE();
 272
 273         if (!mp || !mp->pool_data) {
 274                 DPAA_MEMPOOL_ERR("Invalid mempool provided\n");
 275                 return 0;
 276         }
 277
 278         bp_info = DPAA_MEMPOOL_TO_POOL_INFO(mp);
 279         total_elt_sz = mp->header_size + mp->elt_size + mp->trailer_size;
 280
 281         DPAA_MEMPOOL_DEBUG("Req size %lu vs Available %u\n",
 282                            len, total_elt_sz * mp->size);
 283
 284         /* Detect pool area has sufficient space for elements in this memzone */
 285         if (len < total_elt_sz * mp->size)
 286                 /* Else, Memory will be allocated from multiple memzones */
 287                 bp_info->flags |= DPAA_MPOOL_MULTI_MEMZONE;
 288
 289         return 0;
 290 }
 291
 292 struct rte_mempool_ops dpaa_mpool_ops = {
 293         .name = "dpaa",
 294         .alloc = dpaa_mbuf_create_pool,
 295         .free = dpaa_mbuf_free_pool,
 296         .enqueue = dpaa_mbuf_free_bulk,
 297         .dequeue = dpaa_mbuf_alloc_bulk,
 298         .get_count = dpaa_mbuf_get_count,
 299         .register_memory_area = dpaa_register_memory_area,
 300 };
 301
 302 MEMPOOL_REGISTER_OPS(dpaa_mpool_ops);