drivers/mempool/dpaa/dpaa_mempool.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  *
   3  *   Copyright 2017,2019 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 #include <dpaax_iova_table.h>
  30
  31 /* List of all the memseg information locally maintained in dpaa driver. This
  32  * is to optimize the PA_to_VA searches until a better mechanism (algo) is
  33  * available.
  34  */
  35 struct dpaa_memseg_list rte_dpaa_memsegs
  36         = TAILQ_HEAD_INITIALIZER(rte_dpaa_memsegs);
  37
  38 struct dpaa_bp_info *rte_dpaa_bpid_info;
  39
  40 RTE_LOG_REGISTER(dpaa_logtype_mempool, mempool.dpaa, NOTICE);
  41
  42 static int
  43 dpaa_mbuf_create_pool(struct rte_mempool *mp)
  44 {
  45         struct bman_pool *bp;
  46         struct bm_buffer bufs[8];
  47         struct dpaa_bp_info *bp_info;
  48         uint8_t bpid;
  49         int num_bufs = 0, ret = 0;
  50         struct bman_pool_params params = {
  51                 .flags = BMAN_POOL_FLAG_DYNAMIC_BPID
  52         };
  53
  54         MEMPOOL_INIT_FUNC_TRACE();
  55
  56         if (unlikely(!DPAA_PER_LCORE_PORTAL)) {
  57                 ret = rte_dpaa_portal_init((void *)0);
  58                 if (ret) {
  59                         DPAA_MEMPOOL_ERR(
  60                                 "rte_dpaa_portal_init failed with ret: %d",
  61                                  ret);
  62                         return -1;
  63                 }
  64         }
  65         bp = bman_new_pool(&params);
  66         if (!bp) {
  67                 DPAA_MEMPOOL_ERR("bman_new_pool() failed");
  68                 return -ENODEV;
  69         }
  70         bpid = bman_get_params(bp)->bpid;
  71
  72         /* Drain the pool of anything already in it. */
  73         do {
  74                 /* Acquire is all-or-nothing, so we drain in 8s,
  75                  * then in 1s for the remainder.
  76                  */
  77                 if (ret != 1)
  78                         ret = bman_acquire(bp, bufs, 8, 0);
  79                 if (ret < 8)
  80                         ret = bman_acquire(bp, bufs, 1, 0);
  81                 if (ret > 0)
  82                         num_bufs += ret;
  83         } while (ret > 0);
  84         if (num_bufs)
  85                 DPAA_MEMPOOL_WARN("drained %u bufs from BPID %d",
  86                                   num_bufs, bpid);
  87
  88         if (rte_dpaa_bpid_info == NULL) {
  89                 rte_dpaa_bpid_info = (struct dpaa_bp_info *)rte_zmalloc(NULL,
  90                                 sizeof(struct dpaa_bp_info) * DPAA_MAX_BPOOLS,
  91                                 RTE_CACHE_LINE_SIZE);
  92                 if (rte_dpaa_bpid_info == NULL) {
  93                         bman_free_pool(bp);
  94                         return -ENOMEM;
  95                 }
  96         }
  97
  98         rte_dpaa_bpid_info[bpid].mp = mp;
  99         rte_dpaa_bpid_info[bpid].bpid = bpid;
 100         rte_dpaa_bpid_info[bpid].size = mp->elt_size;
 101         rte_dpaa_bpid_info[bpid].bp = bp;
 102         rte_dpaa_bpid_info[bpid].meta_data_size =
 103                 sizeof(struct rte_mbuf) + rte_pktmbuf_priv_size(mp);
 104         rte_dpaa_bpid_info[bpid].dpaa_ops_index = mp->ops_index;
 105         rte_dpaa_bpid_info[bpid].ptov_off = 0;
 106         rte_dpaa_bpid_info[bpid].flags = 0;
 107
 108         bp_info = rte_malloc(NULL,
 109                              sizeof(struct dpaa_bp_info),
 110                              RTE_CACHE_LINE_SIZE);
 111         if (!bp_info) {
 112                 DPAA_MEMPOOL_WARN("Memory allocation failed for bp_info");
 113                 bman_free_pool(bp);
 114                 return -ENOMEM;
 115         }
 116
 117         rte_memcpy(bp_info, (void *)&rte_dpaa_bpid_info[bpid],
 118                    sizeof(struct dpaa_bp_info));
 119         mp->pool_data = (void *)bp_info;
 120
 121         DPAA_MEMPOOL_INFO("BMAN pool created for bpid =%d", bpid);
 122         return 0;
 123 }
 124
 125 static void
 126 dpaa_mbuf_free_pool(struct rte_mempool *mp)
 127 {
 128         struct dpaa_bp_info *bp_info = DPAA_MEMPOOL_TO_POOL_INFO(mp);
 129
 130         MEMPOOL_INIT_FUNC_TRACE();
 131
 132         if (bp_info) {
 133                 bman_free_pool(bp_info->bp);
 134                 DPAA_MEMPOOL_INFO("BMAN pool freed for bpid =%d",
 135                                   bp_info->bpid);
 136                 rte_free(mp->pool_data);
 137                 mp->pool_data = NULL;
 138         }
 139 }
 140
 141 static void
 142 dpaa_buf_free(struct dpaa_bp_info *bp_info, uint64_t addr)
 143 {
 144         struct bm_buffer buf;
 145         int ret;
 146
 147         DPAA_MEMPOOL_DPDEBUG("Free 0x%" PRIx64 " to bpid: %d",
 148                            addr, bp_info->bpid);
 149
 150         bm_buffer_set64(&buf, addr);
 151 retry:
 152         ret = bman_release(bp_info->bp, &buf, 1, 0);
 153         if (ret) {
 154                 DPAA_MEMPOOL_DEBUG("BMAN busy. Retrying...");
 155                 cpu_spin(CPU_SPIN_BACKOFF_CYCLES);
 156                 goto retry;
 157         }
 158 }
 159
 160 static int
 161 dpaa_mbuf_free_bulk(struct rte_mempool *pool,
 162                     void *const *obj_table,
 163                     unsigned int n)
 164 {
 165         struct dpaa_bp_info *bp_info = DPAA_MEMPOOL_TO_POOL_INFO(pool);
 166         int ret;
 167         unsigned int i = 0;
 168
 169         DPAA_MEMPOOL_DPDEBUG("Request to free %d buffers in bpid = %d",
 170                              n, bp_info->bpid);
 171
 172         if (unlikely(!DPAA_PER_LCORE_PORTAL)) {
 173                 ret = rte_dpaa_portal_init((void *)0);
 174                 if (ret) {
 175                         DPAA_MEMPOOL_ERR("rte_dpaa_portal_init failed with ret: %d",
 176                                          ret);
 177                         return 0;
 178                 }
 179         }
 180
 181         while (i < n) {
 182                 uint64_t phy = rte_mempool_virt2iova(obj_table[i]);
 183
 184                 if (unlikely(!bp_info->ptov_off)) {
 185                         /* buffers are from single mem segment */
 186                         if (bp_info->flags & DPAA_MPOOL_SINGLE_SEGMENT) {
 187                                 bp_info->ptov_off = (size_t)obj_table[i] - phy;
 188                                 rte_dpaa_bpid_info[bp_info->bpid].ptov_off
 189                                                 = bp_info->ptov_off;
 190                         }
 191                 }
 192
 193                 dpaa_buf_free(bp_info,
 194                               (uint64_t)phy + bp_info->meta_data_size);
 195                 i = i + 1;
 196         }
 197
 198         DPAA_MEMPOOL_DPDEBUG("freed %d buffers in bpid =%d",
 199                              n, bp_info->bpid);
 200
 201         return 0;
 202 }
 203
 204 static int
 205 dpaa_mbuf_alloc_bulk(struct rte_mempool *pool,
 206                      void **obj_table,
 207                      unsigned int count)
 208 {
 209         struct rte_mbuf **m = (struct rte_mbuf **)obj_table;
 210         struct bm_buffer bufs[DPAA_MBUF_MAX_ACQ_REL];
 211         struct dpaa_bp_info *bp_info;
 212         void *bufaddr;
 213         int i, ret;
 214         unsigned int n = 0;
 215
 216         bp_info = DPAA_MEMPOOL_TO_POOL_INFO(pool);
 217
 218         DPAA_MEMPOOL_DPDEBUG("Request to alloc %d buffers in bpid = %d",
 219                              count, bp_info->bpid);
 220
 221         if (unlikely(count >= (RTE_MEMPOOL_CACHE_MAX_SIZE * 2))) {
 222                 DPAA_MEMPOOL_ERR("Unable to allocate requested (%u) buffers",
 223                                  count);
 224                 return -1;
 225         }
 226
 227         if (unlikely(!DPAA_PER_LCORE_PORTAL)) {
 228                 ret = rte_dpaa_portal_init((void *)0);
 229                 if (ret) {
 230                         DPAA_MEMPOOL_ERR("rte_dpaa_portal_init failed with ret: %d",
 231                                          ret);
 232                         return -1;
 233                 }
 234         }
 235
 236         while (n < count) {
 237                 /* Acquire is all-or-nothing, so we drain in 7s,
 238                  * then the remainder.
 239                  */
 240                 if ((count - n) > DPAA_MBUF_MAX_ACQ_REL) {
 241                         ret = bman_acquire(bp_info->bp, bufs,
 242                                            DPAA_MBUF_MAX_ACQ_REL, 0);
 243                 } else {
 244                         ret = bman_acquire(bp_info->bp, bufs, count - n, 0);
 245                 }
 246                 /* In case of less than requested number of buffers available
 247                  * in pool, qbman_swp_acquire returns 0
 248                  */
 249                 if (ret <= 0) {
 250                         DPAA_MEMPOOL_DPDEBUG("Buffer acquire failed (%d)",
 251                                              ret);
 252                         /* The API expect the exact number of requested
 253                          * buffers. Releasing all buffers allocated
 254                          */
 255                         dpaa_mbuf_free_bulk(pool, obj_table, n);
 256                         return -ENOBUFS;
 257                 }
 258                 /* assigning mbuf from the acquired objects */
 259                 for (i = 0; (i < ret) && bufs[i].addr; i++) {
 260                         /* TODO-errata - objerved that bufs may be null
 261                          * i.e. first buffer is valid, remaining 6 buffers
 262                          * may be null.
 263                          */
 264                         bufaddr = DPAA_MEMPOOL_PTOV(bp_info, bufs[i].addr);
 265                         m[n] = (struct rte_mbuf *)((char *)bufaddr
 266                                                 - bp_info->meta_data_size);
 267                         DPAA_MEMPOOL_DPDEBUG("Paddr (%p), FD (%p) from BMAN",
 268                                              (void *)bufaddr, (void *)m[n]);
 269                         n++;
 270                 }
 271         }
 272
 273         DPAA_MEMPOOL_DPDEBUG("Allocated %d buffers from bpid=%d",
 274                              n, bp_info->bpid);
 275         return 0;
 276 }
 277
 278 static unsigned int
 279 dpaa_mbuf_get_count(const struct rte_mempool *mp)
 280 {
 281         struct dpaa_bp_info *bp_info;
 282
 283         MEMPOOL_INIT_FUNC_TRACE();
 284
 285         if (!mp || !mp->pool_data) {
 286                 DPAA_MEMPOOL_ERR("Invalid mempool provided\n");
 287                 return 0;
 288         }
 289
 290         bp_info = DPAA_MEMPOOL_TO_POOL_INFO(mp);
 291
 292         return bman_query_free_buffers(bp_info->bp);
 293 }
 294
 295 static int
 296 dpaa_populate(struct rte_mempool *mp, unsigned int max_objs,
 297               void *vaddr, rte_iova_t paddr, size_t len,
 298               rte_mempool_populate_obj_cb_t *obj_cb, void *obj_cb_arg)
 299 {
 300         struct dpaa_bp_info *bp_info;
 301         unsigned int total_elt_sz;
 302
 303         if (!mp || !mp->pool_data) {
 304                 DPAA_MEMPOOL_ERR("Invalid mempool provided\n");
 305                 return 0;
 306         }
 307
 308         /* Update the PA-VA Table */
 309         dpaax_iova_table_update(paddr, vaddr, len);
 310
 311         bp_info = DPAA_MEMPOOL_TO_POOL_INFO(mp);
 312         total_elt_sz = mp->header_size + mp->elt_size + mp->trailer_size;
 313
 314         DPAA_MEMPOOL_DPDEBUG("Req size %" PRIx64 " vs Available %u\n",
 315                            (uint64_t)len, total_elt_sz * mp->size);
 316
 317         /* Detect pool area has sufficient space for elements in this memzone */
 318         if (len >= total_elt_sz * mp->size)
 319                 bp_info->flags |= DPAA_MPOOL_SINGLE_SEGMENT;
 320         struct dpaa_memseg *ms;
 321
 322         /* For each memory chunk pinned to the Mempool, a linked list of the
 323          * contained memsegs is created for searching when PA to VA
 324          * conversion is required.
 325          */
 326         ms = rte_zmalloc(NULL, sizeof(struct dpaa_memseg), 0);
 327         if (!ms) {
 328                 DPAA_MEMPOOL_ERR("Unable to allocate internal memory.");
 329                 DPAA_MEMPOOL_WARN("Fast Physical to Virtual Addr translation would not be available.");
 330                 /* If the element is not added, it would only lead to failure
 331                  * in searching for the element and the logic would Fallback
 332                  * to traditional DPDK memseg traversal code. So, this is not
 333                  * a blocking error - but, error would be printed on screen.
 334                  */
 335                 return 0;
 336         }
 337
 338         ms->vaddr = vaddr;
 339         ms->iova = paddr;
 340         ms->len = len;
 341         /* Head insertions are generally faster than tail insertions as the
 342          * buffers pinned are picked from rear end.
 343          */
 344         TAILQ_INSERT_HEAD(&rte_dpaa_memsegs, ms, next);
 345
 346         return rte_mempool_op_populate_helper(mp, 0, max_objs, vaddr, paddr,
 347                                                len, obj_cb, obj_cb_arg);
 348 }
 349
 350 static const struct rte_mempool_ops dpaa_mpool_ops = {
 351         .name = DPAA_MEMPOOL_OPS_NAME,
 352         .alloc = dpaa_mbuf_create_pool,
 353         .free = dpaa_mbuf_free_pool,
 354         .enqueue = dpaa_mbuf_free_bulk,
 355         .dequeue = dpaa_mbuf_alloc_bulk,
 356         .get_count = dpaa_mbuf_get_count,
 357         .populate = dpaa_populate,
 358 };
 359
 360 MEMPOOL_REGISTER_OPS(dpaa_mpool_ops);