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