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